An engine exhaust pipe assembly and an engine having the same.

Abstract

This utility model provides an engine exhaust pipe assembly, including an exhaust pipe connected to the engine's aftertreatment system to receive engine exhaust gases, and a water-blocking pipe fitted inside the exhaust pipe. The water-blocking pipe includes a cylindrical main body and a connecting ring protruding from the outside of the main body. The connecting ring is fixedly connected to the inner wall of the exhaust pipe. The outer diameter of the main body is smaller than the inner diameter of the exhaust pipe, so that the outer wall of the main body, the inner wall of the exhaust pipe, and the connecting ring together form an annular drainage groove. The exhaust pipe also has a drainage hole connecting the drainage groove to the outside, and the connecting ring is installed below the drainage hole. Through the annular drainage groove formed by the water-blocking pipe and the inner wall of the exhaust pipe, combined with the drainage hole located above the connecting ring, rainwater flowing in along the pipe wall is intercepted and discharged in a directed manner, completely blocking the path of rainwater entering the aftertreatment system and solving the problem of rainwater backflow in traditional exhaust pipes.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to an engine exhaust pipe assembly and an engine having the same. Background Technology

[0002] In existing technology, the exhaust tailpipe is typically connected to the engine aftertreatment system via a notch at the bottom and secured with clamps. However, this structure lacks a rainproof design, allowing rainwater to easily enter the aftertreatment system through the exhaust tailpipe during heavy rain, and potentially even backflow into the engine. This can not only damage the aftertreatment system's function but also cause engine starting failures, severely impacting the system's normal operation and lifespan.

[0003] Therefore, there is an urgent need for an exhaust tailpipe structure that can effectively prevent rainwater from entering the after-processor, in order to solve the defects existing in the prior art. Utility Model Content

[0004] The purpose of this utility model is to provide an engine exhaust pipe assembly and an engine having the same. The annular drainage groove formed by the water-proof pipe and the inner wall of the exhaust pipe, combined with the drainage hole located above the connecting ring, allows rainwater to be intercepted and discharged in a directional manner when it flows in along the pipe wall, completely blocking the path of rainwater into the after-processor and solving the problem of rainwater backflow in traditional exhaust pipes.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] This utility model provides an engine exhaust pipe assembly, including an exhaust pipe for communicating with an engine aftertreatment unit to receive engine exhaust gas, and a water-blocking pipe sleeved inside the exhaust pipe; the water-blocking pipe includes a cylindrical main body and a connecting ring protruding from the outside of the main body, the connecting ring being fixedly connected to the inner wall of the exhaust pipe, the outer diameter of the main body being smaller than the inner diameter of the exhaust pipe, such that the outer wall of the main body, the inner wall of the exhaust pipe, and the connecting ring together form an annular drainage groove; the exhaust pipe also has a drainage hole communicating with the drainage groove to the outside, and the connecting ring is installed below the drainage hole.

[0007] Furthermore, an inclined guide surface is provided at the connection between the outer wall of the main body and the connecting ring, and the height of the guide surface gradually decreases from the outer wall of the main body towards the drain hole.

[0008] Furthermore, the main pipe is erected vertically, and the top of the main pipe is higher than the height of the drain hole.

[0009] Furthermore, multiple drainage holes are provided and are evenly distributed along the circumference of the exhaust pipe.

[0010] Furthermore, the exhaust pipe includes a connecting section and a guide section that are connected to each other. The connecting section is vertically arranged and is used to communicate with the engine's after-treatment system. The connecting ring is connected to the inner wall of the connecting section. The guide section is bent relative to the connecting section and is inclined upward relative to the horizontal plane.

[0011] Furthermore, the tilt angle ranges from 10° to 30°, and the bevel angle of the end cut of the guide section ranges from 90° to 120°.

[0012] Furthermore, the drainage trough is used to collect water entering from the inlet of the guide section and then discharge it.

[0013] Furthermore, the drainage hole is formed on the connecting section.

[0014] An engine includes an engine body, an after-processor connected to the engine body, and an engine exhaust pipe assembly as described in any one of the embodiments connected to the after-processor, characterized in that the exhaust pipe of the engine exhaust pipe assembly is connected to the after-processor to receive engine exhaust gas generated by the engine body and processed by the after-processor, the drain trough is used to collect water entering the exhaust pipe from the outside, and the drain hole is used to discharge the water collected by the drain trough.

[0015] Furthermore, the exhaust pipe also includes a clamp assembly installed at the connection point between the connecting section and the after-processor for fixing the exhaust pipe and the after-processor to each other.

[0016] This utility model provides an engine exhaust pipe assembly, including an exhaust pipe connected to the engine's aftertreatment system to receive engine exhaust gases, and a water-blocking pipe fitted inside the exhaust pipe. The water-blocking pipe includes a cylindrical main body and a connecting ring protruding from the outside of the main body. The connecting ring is fixedly connected to the inner wall of the exhaust pipe. The outer diameter of the main body is smaller than the inner diameter of the exhaust pipe, so that the outer wall of the main body, the inner wall of the exhaust pipe, and the connecting ring together form an annular drainage groove. The exhaust pipe also has a drainage hole connecting the drainage groove to the outside, and the connecting ring is installed below the drainage hole. Through the annular drainage groove formed by the water-blocking pipe and the inner wall of the exhaust pipe, combined with the drainage hole located above the connecting ring, rainwater flowing in along the pipe wall is intercepted and discharged in a directed manner, completely blocking the path of rainwater entering the aftertreatment system and solving the problem of rainwater backflow in traditional exhaust pipes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an engine exhaust pipe assembly provided in an embodiment of the present invention.

[0019] Figure 2 for Figure 1 The diagram shows the structure of the water inlet pipe of the engine exhaust pipe assembly.

[0020] Figure 3 for Figure 1 The diagram shows the structure of the exhaust pipe in the engine exhaust pipe assembly.

[0021] In the diagram: 1. Exhaust pipe; 11. Drain hole; 12. Connecting section; 13. Guide section; 14. Clamp assembly; 2. Waterproof pipe; 21. Main body; 22. Connecting ring; 23. Guide surface; 3. Drainage trough. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when this utility model is in use. They are only for the convenience of description and simplification, 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.

[0025] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides an engine exhaust pipe assembly, including an exhaust pipe 1 connected to the engine's after-processor to receive engine exhaust gas, and a water-blocking pipe 2 sleeved inside the exhaust pipe 1; the water-blocking pipe 2 includes a cylindrical main body 21 and a connecting ring 22 protruding from the outside of the main body 21, the connecting ring 22 being fixedly connected to the inner wall of the exhaust pipe 1, the outer diameter of the main body 21 being smaller than the inner diameter of the exhaust pipe 1, so that the outer wall of the main body 21, the inner wall of the exhaust pipe 1, and the connecting ring 22 together form an annular drainage groove 3; the exhaust pipe 1 also has a drainage hole 11 connecting the drainage groove 3 to the outside, and the connecting ring 22 is installed below the drainage hole 11.

[0028] Specifically, the exhaust pipe 1 is tubular in shape with a smooth inner wall and one or more circular exhaust holes on the pipe wall; the water-proof pipe 2 consists of a cylindrical pipe body and an annular connecting ring 22 protruding from the outside of the main pipe body 21. The two ends of the main pipe body 21 are connected, and the connecting ring 22 extends radially outward along the main pipe body 21 with the annular surface perpendicular to the axis of the main pipe body 21. The whole is in the form of "cylindrical body + annular boss". The outer wall of the main pipe body 21, the inner wall of the exhaust pipe 1 and the connecting ring 22 together form a closed annular groove-shaped drainage groove 3. The groove width is the difference between the inner diameter of the exhaust pipe 1 and the outer diameter of the main pipe body 21, and the groove depth is determined by the axial width of the connecting ring 22.

[0029] Specifically, one end of the exhaust pipe 1 is connected to the exhaust outlet of the engine after-treatment system, and the other end extends along the engine exhaust path, located in the exhaust channel between the engine after-treatment system and the exhaust terminal; the water-cooling pipe 2 is sleeved inside the exhaust pipe 1, the main body 21 is coaxially arranged with the exhaust pipe 1, the annular surface of the connecting ring 22 is tightly fitted and fixedly connected to the inner wall of the exhaust pipe 1, and the connecting ring 22 is located directly below the drain hole 11, so that the drain hole 11 is opened on the pipe wall of the exhaust pipe 1 above the connecting ring 22.

[0030] The exhaust pipe 1 is not only a channel for conveying exhaust gas after the engine aftertreatment, but also a carrier for the installation of the water inlet pipe 2. It cooperates with the connecting ring 22 to form a drainage groove 3 and discharges liquid through the drain hole 11. The main body 21 of the water inlet pipe 2 forms an annular gap with the inner wall of the exhaust pipe 1, guiding liquids such as condensate in the exhaust gas into the drainage groove 3. The connecting ring 22 securely installs the water inlet pipe 2 in the exhaust pipe 1 to prevent it from shifting, and also blocks the downward flow of liquid, causing it to accumulate in the drainage groove 3. The drain hole 11 drains the liquid in the drainage groove 3 to prevent liquid from accumulating in the exhaust pipe 1.

[0031] In this embodiment, an inclined guide surface 23 is provided at the connection between the outer wall of the main pipe 21 and the connecting ring 22. The guide surface 23 is a smooth slope that gradually slopes down from the outer wall of the main pipe 21 toward the drain hole 11, and smoothly transitions with the outer wall of the main pipe 21 and the surface of the connecting ring 22. The guide surface 23 is located at the connection between the main pipe 21 and the connecting ring 22 of the water-proof pipe 2, in the drain groove 3 inside the exhaust pipe 1, specifically on the side of the outer wall of the main pipe 21 near the connecting ring 22, and its inclined direction is toward the drain hole 11 opened on the exhaust pipe 1, which can guide the liquid on the surface of the main pipe 21 to the drain hole 11.

[0032] Specifically, when liquids such as condensate and residual flushing water in the exhaust gas flow to the outer wall of the main pipe 21, the guide surface 23 can effectively guide the liquid with its inclined structure, causing the liquid to flow along the inclined surface towards the drain hole 11, accelerating the speed at which the liquid enters the drain tank 3 and is finally discharged through the drain hole 11, preventing the liquid from accumulating at the connection between the main pipe 21 and the connecting ring 22, further improving the drainage efficiency of the entire exhaust pipe 1 assembly, and reducing the residence time of the liquid in the exhaust pipe 1.

[0033] In this embodiment, the main pipe 21 is fitted inside the exhaust pipe 1 and is arranged coaxially with the exhaust pipe 1. The connecting ring 22 protrudes from the outside of the main pipe 21 and is fixedly connected to the inner wall of the exhaust pipe 1. At this time, the main pipe 21 exists in an upright state, and its top extends upward to a position higher than the drain hole 11.

[0034] Since the top of the main pipe 21 is higher than the drain hole 11, it can guide and block the exhaust gas in the exhaust pipe 1, reducing the direct impact of the exhaust gas on the drain hole 11 area. At the same time, when liquid mixed in the exhaust gas or water from the outside flows upward, the higher top of the main pipe 21 can prevent it from passing over the main pipe 21, making it easier for it to flow downward along the outer wall of the main pipe 21 under the action of gravity. Combined with the guide surface 23 at the connection between the main pipe 21 and the connecting ring 22, it can more efficiently introduce the liquid into the drain tank 3 and discharge it through the drain hole 11, avoiding the accumulation of liquid in the upper part of the exhaust pipe 1 or overflow with the exhaust gas.

[0035] Specifically, in this embodiment, the multiple drainage holes 11 are all small circular holes, evenly distributed along the circumference of the exhaust pipe 1, meaning that the central angle between any two adjacent drainage holes 11 is equal, forming a ring-shaped hole structure. These drainage holes 11 are located at the corresponding drainage groove 3 positions on the exhaust pipe 1, specifically directly above the connecting ring 22 and on the pipe wall of the exhaust pipe 1 below the top of the main pipe body 21, and are connected to the interior of the drainage groove 3. By using multiple evenly distributed drainage holes 11, the drainage area is increased, drainage efficiency is improved, and the situation where liquid cannot be discharged from the drainage groove 3 due to blockage of a single drainage hole 11 is avoided. At the same time, the circumferentially evenly distributed design allows liquid at different positions in the drainage groove 3 to be discharged quickly and evenly through the corresponding drainage holes 11, reducing the retention and accumulation of liquid in the drainage groove 3, and further preventing liquid from accumulating in the exhaust pipe 1 and causing corrosion or affecting the smooth flow of exhaust.

[0036] In this embodiment, the exhaust pipe 1 includes a connecting section 12 and a guide section 13. The connecting section 12 is a tubular structure, which is vertical (the angle between its axis and the vertical line is in the range of 0°-15°). The inner wall is used to install the connecting pipe of the water-proof pipe 2. One end is connected to the engine's after-processor, so that the exhaust gas enters the initial channel of the exhaust pipe 1. The guide section 13 is also tubular, connected to the connecting section 12 and bent. Its bending angle relative to the connecting section 12 is designed according to the engine compartment layout and is inclined upward relative to the horizontal surface. The inclination angle is preferably between 10° and 30°. The end cut is at an angle. The angle range (i.e., the angle between the cut plane and the axis of the guide section 13) is preferably 90° to 120°. The whole forms a combination of "vertical straight pipe + bent upward inclined pipe".

[0037] Specifically, the connecting section 12 is located at the exhaust outlet of the engine after-treatment unit and is fixedly connected to the after-treatment unit via a flange or welding. Its internal connecting ring 22 is connected to the main body 21 of the water inlet pipe 2, ensuring stable installation of the water inlet pipe 2. The guide section 13 is connected to the end of the connecting section 12 furthest from the after-treatment unit, extending along the engine exhaust path towards the outside of the vehicle or subsequent devices. Its bending and tilting design allows it to adapt to the spatial layout within the engine compartment, avoiding interference with other components. The function of the connecting section 12 is to receive the exhaust gas discharged from the after-treatment unit, providing an initial flow channel for the exhaust gas, and ensuring the stable installation of the water inlet pipe 2 via the fixed connecting ring 22. The upward tilt angle (10°~30°) of the guide section 13 reduces exhaust resistance and lowers the risk of backflow from external foreign objects (such as rainwater). The 90°~120° angled cut at the end optimizes the exhaust direction, allowing the exhaust gas to be discharged more smoothly and reducing exhaust noise and airflow disturbance.

[0038] In this embodiment, the main function of the drainage trough 3 is to collect water entering from the inlet of the guide section 13. When the water enters from the inlet of the guide section 13, it will flow to the connecting section 12 under the action of gravity and other forces. At this time, the drainage trough 3 can intercept and collect this water. The drainage hole 11 is opened on the connecting section 12, which corresponds to the drainage trough 3. It can discharge the water collected by the drainage trough 3 to the outside of the exhaust pipe 1 in a timely manner, so as to avoid water accumulating in the exhaust pipe 1 and affecting the normal operation of the engine.

[0039] Another embodiment of this application provides an engine, including an engine body, an after-processor, and an engine exhaust pipe 1 assembly. One end of the after-processor is connected to the exhaust port of the engine body via a pipe, and the other end is connected to the exhaust pipe 1 of the engine exhaust pipe 1 assembly. One end of the connecting section 12 of the exhaust pipe 1 is connected to the after-processor, and the other end is connected to the guide section 13. The water-separating pipe 2 is fixed inside the connecting section 12 by a connecting ring 22, so that the drainage trough 3 is located inside the connecting section 12 and below the drainage hole 11. When the engine body is working, it generates exhaust gas. After the exhaust gas is processed by the after-processor, it enters the exhaust pipe 1 of the exhaust pipe 1 assembly and is transported to the outside by the exhaust pipe 1. During this process, the drainage trough 3 is used to collect water entering the exhaust pipe 1 from the outside (such as the inlet of the guide section 13). The collected water converges in the drainage trough 3 under the action of gravity and is discharged through the drainage hole 11 on the connecting section 12 to prevent water from accumulating in the exhaust pipe 1. The main body 21 of the water-separating pipe 2 can guide the water flow to the drainage trough 3, and the connecting ring 22 serves to fix the water-separating pipe 2 and form the bottom wall of the drainage trough 3.

[0040] Specifically, the engine exhaust pipe assembly also includes a clamp assembly 14 installed at the connection point between the exhaust pipe 1 connecting section 12 and the after-processor, for firmly fixing the exhaust pipe 1 connecting section 12 and the after-processor together to prevent loosening when the engine vibrates or exhaust pressure impacts during operation.

[0041] The engine exhaust pipe assembly provided by this utility model includes an exhaust pipe 1 that communicates with the engine's after-processor to receive engine exhaust gas, and a water-blocking pipe 2 fitted inside the exhaust pipe 1. The water-blocking pipe 2 includes a cylindrical main body 21 and a connecting ring 22 protruding from the outside of the main body 21. The connecting ring 22 is fixedly connected to the inner wall of the exhaust pipe 1. The outer diameter of the main body 21 is smaller than the inner diameter of the exhaust pipe 1, so that the outer wall of the main body 21, the inner wall of the exhaust pipe 1, and the connecting ring 22 together form an annular drainage groove 3. The exhaust pipe 1 also has a drainage hole 11 that communicates the drainage groove 3 with the outside, and the connecting ring 22 is installed below the drainage hole 11. Through the annular drainage groove 3 formed by the water-blocking pipe 2 and the inner wall of the exhaust pipe 1, combined with the drainage hole 11 located above the connecting ring 22, rainwater is intercepted and discharged in a directed manner when it flows in along the pipe wall, completely blocking the path of rainwater into the after-processor and solving the problem of rainwater backflow in traditional exhaust pipes.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An engine exhaust pipe assembly characterized by, The system includes an exhaust pipe (1) for communicating with an engine after-processor to receive engine exhaust gas, and a water-proof pipe (2) fitted inside the exhaust pipe (1). The water-proof pipe (2) includes a cylindrical main body (21) and a connecting ring (22) protruding from the outside of the main body (21). The connecting ring (22) is fixedly connected to the inner wall of the exhaust pipe (1). The outer diameter of the main body (21) is smaller than the inner diameter of the exhaust pipe (1), so that the outer wall of the main body (21), the inner wall of the exhaust pipe (1), and the connecting ring (22) together form an annular drainage groove (3). The exhaust pipe (1) also has a drainage hole (11) that communicates the drainage groove (3) with the outside. The connecting ring (22) is installed below the drainage hole (11).

2. The engine exhaust pipe assembly according to claim 1, characterized in that, An inclined guide surface (23) is provided at the connection between the outer wall of the main body (21) and the connecting ring (22), and the height of the guide surface (23) gradually decreases from the outer wall of the main body (21) toward the drain hole (11).

3. The engine exhaust pipe assembly according to claim 2, characterized in that, The main body (21) is erected, and the top of the main body (21) is higher than the height of the drain hole (11).

4. The engine exhaust pipe assembly according to claim 3, characterized in that, The drain holes (11) are provided in multiple locations and are evenly distributed around the circumference of the exhaust pipe (1).

5. The engine exhaust pipe assembly according to claim 1, characterized in that, The exhaust pipe (1) includes a connecting section (12) and a guide section (13) connected to each other. The connecting section (12) is set vertically for communication with the engine's after-processor. The connecting ring (22) is connected to the inner wall of the connecting section (12). The guide section (13) is bent relative to the connecting section (12) and is inclined upward relative to the horizontal plane.

6. The engine exhaust pipe assembly according to claim 5, characterized in that, The tilt angle range is 10°~30°, and the angle range of the cut at the end of the guide section (13) is 90°~120°.

7. The engine exhaust pipe assembly according to claim 5, characterized in that, The drainage channel (3) is used to collect water entering from the inlet of the guide section (13) and then discharge it.

8. The engine exhaust pipe assembly according to claim 6, characterized in that, The drain hole (11) is opened on the connecting section (12).

9. An engine, comprising an engine body, an after-processor in communication with the engine body, and an engine exhaust pipe assembly as described in any one of claims 1-8 in communication with the after-processor, characterized in that, The exhaust pipe (1) of the engine exhaust pipe assembly is connected to the after-processor to receive engine exhaust gas generated by the engine body and processed by the after-processor. The drain trough (3) is used to collect water entering the exhaust pipe (1) from the outside. The drain hole (11) is used to drain the water collected by the drain trough (3).

10. The engine according to claim 9, characterized in that, The exhaust pipe (1) also includes a clamp assembly (14) installed at the connection point between the connecting section (12) and the after-processor for fixing the exhaust pipe (1) and the after-processor to each other.

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