Exhaust pipe assembly of engine, engine comprising exhaust pipe assembly and engineering machinery comprising exhaust pipe assembly

Abstract

The utility model relates to an exhaust pipe assembly of an engine, the engine and engineering machinery. The exhaust pipe assembly comprises an exhaust elbow with an upward exhaust port and a flow guide device. An opening is formed in the bottom of the exhaust elbow; the flow guide device is connected to the exhaust elbow at the position below the opening, the flow guide device is provided with an inlet and an outlet, the inlet is communicated with the opening, and the outlet is arranged to face the outer side direction of the engine so as to guide rainwater and / or waste gas flowing out of the opening to the side direction of the engine. According to the exhaust pipe assembly, the problem that rainwater flowing out of the exhaust bent pipe and dust in waste gas flow to an air filter below the exhaust bent pipe to cause pollution is solved, and the problem that the performance of the exhaust bent pipe is reduced due to the fact that impurities in the waste gas of an engine are adsorbed by the air filter is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an exhaust pipe assembly of an engine, an engine comprising the exhaust pipe assembly and an engineering machine comprising the engine. Background Art

[0002] The exhaust system of construction machinery refers to the system that collects and discharges exhaust gas, which generally includes a muffler and an exhaust tail pipe (also called an exhaust elbow), and may also include an aftertreatment system. Some construction machinery needs to exhaust upward, that is, the outlet of the exhaust tail pipe is arranged vertically upward and has an open structure. This allows rainwater to easily enter the exhaust tail pipe. After rainwater flows back into the exhaust system from the exhaust tail pipe, it may cause corrosion inside the muffler or aftertreatment system, affecting their normal use or reducing their service life.

[0003] In order to solve the problem of rainwater backflow, the exhaust tail pipe located downstream of the muffler in the prior art is provided with a groove at the bottom for draining rainwater in the pipe. Although this solves the problem of rapid drainage and preventing rainwater backflow on rainy days, it also causes the following problems: since an air filter or some other equipment is arranged below the exhaust tail pipe, the rainwater flowing out of the groove flows to the equipment below, such as the air filter; and since the engine exhaust gas leaks out from the groove below the exhaust tail pipe, after a long period of operation, the rainwater mixed with black smoke falls on the equipment below, forming stains thereon. Moreover, the engine exhaust gas leaking out of the groove is easily adsorbed by the air filter below, and the impurities therein further reduce the performance of the air filter. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above object, according to one aspect of the utility model, an exhaust pipe assembly of an engine is provided, the exhaust pipe assembly comprising an exhaust elbow having an exhaust port facing upward and a flow guide device. The bottom of the exhaust elbow is provided with an opening; the flow guide device is connected to the exhaust elbow below the opening, and the flow guide device has an inlet and an outlet, wherein the inlet is connected to the opening, and the outlet is arranged to face the outside direction of the engine to guide rainwater and / or exhaust gas flowing out of the opening to the side of the engine.

[0006] According to an example of the utility model, the engine includes an air filter, the air filter is located below the exhaust pipe assembly in the height direction of the engine, and the guide device is located between the opening of the exhaust elbow and the air filter.

[0007] According to an example of the present invention, the flow guiding device is configured as a conduit, the inlet is formed on the wall of the conduit and the shape of the inlet is suitable for surrounding the opening, and at least one end of the conduit is open to form the outlet.

[0008] According to an example of the present invention, the conduit extends obliquely relative to the horizontal direction, and at least one end of the conduit located at a lower side in the height direction of the engine forms the outlet.

[0009] According to an example of the present utility model, the flow guide device includes a cylindrical joint connected to the outer side of the wall of the exhaust elbow below the opening, and the inner diameter of the cylindrical joint matches the size of the opening.

[0010] According to an example of the utility model, the flow guide device also includes an adapter having a fluid channel inside, the adapter includes a first part connected to the cylindrical joint and a second part having an angle with the first part and provided with the outlet, wherein the angle is configured to make the second part extend downwardly inclined relative to the horizontal direction.

[0011] According to an example of the present utility model, the exhaust pipe assembly further includes a pipeline connected to an outlet of the flow guide device, and the pipeline extends to one side of the engine.

[0012] According to an example of the present utility model, the flow guiding device is connected to the exhaust elbow below the opening in a fluid-tight manner.

[0013] According to another aspect of the present invention, an engine is provided, the engine comprising an air filter and the exhaust pipe assembly as described above, wherein the air filter is located below the exhaust pipe assembly in the height direction of the engine.

[0014] According to another aspect of the utility model, a construction machine is provided. The construction machine comprises the exhaust pipe assembly or the engine as described above.

[0015] The exhaust pipe assembly of the engine of the utility model is provided with an opening at the bottom of the exhaust elbow, and a guide device is provided below the opening, whose outlet is arranged to face the outside direction of the engine, so that rainwater and / or exhaust gas can be guided to one side of the engine through the guide device, for example, directly fall to the ground at the side of the engine. This not only solves the problem that rainwater flowing out of the exhaust elbow mixed with dust in the exhaust gas flows to the air filter below it and pollutes it, but also solves the problem that impurities in the engine exhaust gas are adsorbed by the air filter and its performance is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0017] Figure 1 A perspective view showing an exhaust pipe assembly according to an exemplary embodiment of the present invention is shown.

[0018] Figure 2 Show Figure 1 Front view of the exhaust pipe assembly shown.

[0019] Figure 3 Show Figure 2 A cross-sectional view of the exhaust pipe assembly along line AA is shown.

[0020] Figure 4 A perspective view showing an exhaust pipe assembly according to another exemplary embodiment of the present invention is shown.

[0021] Figure 5 Show Figure 4 A side view of the exhaust pipe assembly is shown.

[0022] Figure 6 Show Figure 5 A cross-sectional view of the exhaust pipe assembly along line BB is shown.

[0023] Figure 7 Show Figure 6 An enlarged view of point C of the exhaust pipe assembly is shown.

[0024] Description of reference numerals:

[0025] 1. exhaust elbow; 11. exhaust port; 12. opening; 2. flow guide device; 21. inlet; 22. outlet; 3. conduit; 4. cylindrical joint; 5. adapter; 51. fluid channel; 52. first part; 53. second part; α, angle. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, it is contemplated that any combination of the features and elements described below may be used to implement the present invention, regardless of whether they relate to different embodiments.

[0027] In the description of the present invention, the expressions "upper", "lower", "above", "below", "above", "below" and the like are used relative to the ground on which the construction machinery is running, wherein the direction closer to the ground is "lower" and the opposite is "upper". The "height direction" herein refers to the vertical direction relative to the ground.

[0028] Terms such as "first", "second", etc. are used herein to describe elements of the present application, and these terms are only used to distinguish the elements, but are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express an open-ended inclusive meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0029] Figures 1 to 4 FIG. 2 shows an exhaust pipe assembly of an engine according to a first embodiment of the present utility model. Figure 1 and Figure 2 As shown, the exhaust pipe assembly according to this embodiment may include an exhaust elbow 1 and a guide device 2. The exhaust elbow 1 may be connected by a first end extending substantially in the horizontal direction, a second end extending in the vertical direction, and a connecting portion extending obliquely from one end of the first end to the lower end of the second end. A flange may be provided at one end of the first end away from the connecting portion, and an end of the second end away from the connecting portion is used as an exhaust port 11. An opening 12 is provided at the bottom (first end) of the exhaust elbow 1, and the opening 12 is connected to the inner cavity of the exhaust elbow 1 to discharge rainwater entering the exhaust elbow 1 through the exhaust port 11. The guide device 2 has an inlet 21 surrounding the opening 12, and is connected to the exhaust elbow 1 below the inlet 21. The guide device 2 also has an outlet 22 arranged to face the outside direction of the engine. Thus, rainwater flowing out of the opening 12 can be caught, and rainwater and / or exhaust gas can be guided to the side of the engine.

[0030] It is understood that the engine of the present utility model refers to an engine assembly, that is, it may include components such as an engine body, an air filter and a muffler. "The outer direction of the engine" is the lateral direction away from the engine body (e.g., its center plane) and the components thereon. In the example of the present utility model, the engine body, the air filter and the muffler can be arranged from bottom to top in the height direction of the engine, and the exhaust elbow 1 is connected to the downstream of the muffler via a flange, and the exhaust elbow 1 is located above the air filter and the engine body in the height direction. The guide device 2 is located between the opening 12 of the exhaust elbow 1 and the air filter in the height direction of the engine. The guide device 2 guides the rainwater and / or exhaust gas flowing out of the opening 12 of the exhaust elbow 1 to the side of the engine, so that the rainwater can be prevented from falling or flowing onto the air filter and / or the engine body below, and the air filter can be prevented from inhaling the exhaust gas leaked from the opening 12, and the mixture produced after the rainwater mixed with the exhaust gas can be prevented from flowing or falling onto the air filter and the engine body below to form stains. In a specific embodiment, each engine body can be provided with two side-by-side air filters and two side-by-side exhaust elbows 1, wherein the outlet 22 of one guide device 2 faces one side of the engine, and the outlet of the other guide device 2 can face the other side of the engine.

[0031] like Figure 1 and Figure 2 As shown, the flow guide device 2 according to this embodiment can be configured as a conduit 3. In this embodiment, the opening 12 can be two narrow slots arranged side by side at the bottom of the exhaust elbow 1. In some other embodiments, the shape of the opening 12 can be a hole of any shape, such as a circle, a square, etc., or a plurality of small hole-like structures arranged at intervals. The inlet 21 is formed on the wall of the conduit 3, and the shape of the inlet 21 is suitable for surrounding the opening 12, which is conducive to enclosing the opening 12 when the conduit 3 is sealed and connected to the exhaust elbow 1 at the opening 12 by a connection method such as welding, so as to guide all rainwater and / or exhaust gas flowing out through the opening 12 into the conduit 3. At least one end of the conduit 3 has an opening to form an outlet.

[0032] Preferably, the conduit 3 can be arranged obliquely and open at least at the lower end to form an outlet 22. This facilitates smooth discharge after entering the exhaust elbow 1. It can be understood that the conduit 3 can also be arranged horizontally and open at one end or both ends. In the present embodiment, the conduit 3 extends obliquely relative to the horizontal direction, and the outlet 22 may include an opening at one end of the conduit 3 located below in the height direction. In this way, rainwater flowing out of the opening 12 can more easily flow out from the lower end of the conduit 3 due to its own weight. The end of the conduit 3 located above in the height direction can also be opened to form an outlet 22. At a larger rainwater flow rate, the two outlets facilitate the rapid outflow of rainwater. At a smaller flow rate, the lower opening is used for the discharge of rainwater, and the upper opening is used for the discharge of exhaust gas.

[0033] In a further embodiment, the flow guide device 2 may further include a pipeline (not shown) connected to the outlet 22 of the conduit 3. The pipeline may be a flow guide tube made of a soft or hard material, preferably a hose. In this case, the outlet 22 of the conduit 3 does not completely extend to the outside of the engine, but the conduit 3 is extended by the pipeline, and the rainwater and / or exhaust gas are guided to one side of the engine through the pipeline.

[0034] Figures 4 to 7 The exhaust pipe assembly of the engine of the second embodiment of the utility model is shown. The differences between the second embodiment and the first embodiment are mainly described below, and the contents that are substantially the same or similar to those in the first embodiment will be omitted or only briefly mentioned.

[0035] The exhaust pipe assembly according to the second embodiment may also include an exhaust elbow 1 and a guide device 2. The bottom of the exhaust elbow 1 has an opening 12, and the rainwater and / or exhaust gas flowing out through the opening 12 is also guided to the side of the engine by the guide device 2. However, in the second embodiment, the opening 12 is configured as a circular hole, and the guide device 2 may include a cylindrical joint 4 connected to the outside of the wall of the exhaust elbow 1 at the opening 12 in a fluid-tight manner. The cylindrical joint 4 has a certain thickness and its inner diameter matches the size of the opening 12, so that one end of the cylindrical joint 4 can have an overlapping portion with the outside of the wall of the exhaust elbow 1, which facilitates fixing the cylindrical joint 4 to the exhaust elbow 1 by welding or bonding. It can be understood that the opening 12 can also be configured as some other structural forms of openings listed above, and it is only necessary to set the inner diameter of the cylindrical joint 4 to completely surround the opening 12.

[0036] Furthermore, if Figures 4 to 7 As shown, the flow guiding device 2 also includes an adapter 5. The adapter 5 has a fluid channel 51 therein and may include: Figure 7The first part 52 is located on the upper side and the second part 53 is located on the lower side. The second part 53 forms an angle α with the first part 52 and extends from one end of the first part 52 to the Figure 7 The lower side shown extends obliquely, thereby enabling the outlet 22 provided at one end of the second part 53 away from the first part 52 to face the outside direction of the engine. The fluid channel 51 passes through the adapter 5 along the central axis of the first part 52 and the second part 53. Preferably, the flow guide device 2 may also include a pipeline connected to the second part 53, which is in fluid communication with the adapter 5 via the outlet 22 and extends to one side of the engine, thereby guiding the rainwater and exhaust gas flowing out of the opening 12 to flow to the outside of the engine. Since the flow guide device 2 includes a pipeline, the second part 53 of the adapter does not need to extend to the outside of the engine, but is extended to the outside of the engine via the pipeline. Preferably, a step portion may be provided on the outer periphery of the second part 53, and when the first part 52 is connected to the tubular joint 4, for example, by a threaded connection, the step portion can abut against the end surface of the tubular joint 4 to position the adapter 5.

[0037] The utility model also provides an engine comprising an air filter and the exhaust pipe assembly, wherein the air filter is located below the exhaust pipe assembly in the height direction of the engine.

[0038] The utility model also provides an engineering machine comprising the exhaust pipe assembly or the engine.

[0039] Industrial Applicability

[0040] The exhaust pipe assembly according to the utility model is suitable for an engine having an exhaust elbow with an upward exhaust port, and is particularly suitable for an engineering machine with an air filter, an engine body and / or other equipment arranged below the exhaust elbow. However, it should be understood that the exhaust pipe assembly of the engine according to the utility model can also be used for a vehicle having an exhaust pipe with an upward exhaust port and other components arranged below the position of the exhaust pipe for discharging rainwater.

[0041] The working process of the two embodiments of the utility model is described below. When rainwater enters the exhaust elbow 1 through the exhaust port 11, the rainwater gathers at the bottom of the exhaust elbow 1 and mixes with part of the exhaust gas, and enters the guide device 2 (the conduit 3 of the first embodiment or the cylindrical joint 4 and the adapter 5 of the second embodiment) through the opening 12.

[0042] In the first embodiment, rainwater and / or exhaust gas enter the conduit 3, and since the conduit 3 extends obliquely relative to the horizontal direction, and one end thereof located at the bottom is open to form an outlet 22. Thus, rainwater entering the conduit 3 can flow out from the opening at the lower end of the conduit 3 due to its own weight. In the example where the conduit 3 directly extends to the outside of the engine, rainwater and / or exhaust gas enter the outlet of the conduit 3 and are directly discharged to the outside of the engine. In the example where the conduit 3 is shorter and does not extend to the outside of the engine, rainwater and / or exhaust gas are discharged to one side of the engine via a pipe extending from the conduit 3. Therefore, rainwater will not flow onto engine components such as the air filter below the exhaust pipe, and will not cause contamination thereto, and will not cause the air filter to inhale exhaust gas leaked from the opening 12 of the exhaust elbow.

[0043] In the second embodiment, rainwater and / or exhaust gas enter the second part 53 via the first part 52 of the cylindrical joint 4 and the adapter 5. Since the second part 53 extends downwardly at an angle relative to the horizontal direction and an outlet 22 is provided at one end (i.e., the lower end) thereof away from the first part, rainwater entering the second part 53 can flow out from the outlet 22 due to its own weight. In the case where the adapter 5 is also connected to a pipeline, the rainwater and / or exhaust gas are discharged to one side of the engine via the pipeline.

[0044] As described above, in the exhaust pipe assembly of the engine according to the utility model, an opening 12 is provided at the bottom of the exhaust elbow 1, and a guide device 2 capable of enclosing the opening 12 is provided at the opening 12. The inlet 21 of the guide device 2 is connected with the opening 12, and the outlet 22 is arranged to face the outside of the engine. This allows rainwater and / or exhaust gas to fall directly from the side of the engine to the ground, which not only solves the problem of rainwater on the exhaust elbow 1 scouring the air filter below it, but also solves the problem of impurities mixed with exhaust gas generated by incomplete combustion when the engine is working being adsorbed by the air filter and affecting the performance of the air filter.

[0045] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. An exhaust pipe assembly of an engine, characterized in that: The exhaust pipe assembly comprises: An exhaust elbow (1) having an exhaust port (11) facing upward, wherein an opening (12) is provided at the bottom of the exhaust elbow (1); and A flow guide device (2), the flow guide device (2) is connected to the exhaust elbow (1) below the opening (12), and the flow guide device (2) has an inlet (21) and an outlet (22), wherein the inlet (21) is communicated with the opening (12), and the outlet (22) is arranged to face the outside of the engine so as to guide rainwater and / or exhaust gas flowing out of the opening (12) to the side of the engine.

2. The exhaust pipe assembly according to claim 1, characterized in that: The engine comprises an air filter, which is located below the exhaust pipe assembly in the height direction of the engine, and the guide device (2) is located between the opening (12) of the exhaust elbow (1) and the air filter.

3. The exhaust pipe assembly according to claim 1, characterized in that The flow guide device (2) is configured as a conduit (3), the inlet (21) is formed on the wall of the conduit (3) and the shape of the inlet (21) is suitable for surrounding the opening (12), and at least one end of the conduit (3) is open to form the outlet (22).

4. The exhaust pipe assembly according to claim 3, characterized in that: The duct (3) extends obliquely relative to the horizontal direction, and at least one end of the duct (3) located at the bottom in the height direction of the engine is open to form the outlet (22).

5. The exhaust pipe assembly according to claim 1, characterized in that The flow guide device (2) comprises a cylindrical joint (4) connected to the outer side of the wall of the exhaust elbow (1) below the opening (12), and the inner diameter of the cylindrical joint (4) matches the size of the opening (12).

6. The exhaust pipe assembly according to claim 5, characterized in that The flow guide device (2) further comprises an adapter (5) having a fluid channel (51) therein, the adapter (5) comprising a first portion (52) connected to the cylindrical joint (4) and a second portion (53) having an angle (α) with the first portion (52) and provided with the outlet (22), wherein the angle (α) is configured such that the second portion (53) extends downwardly obliquely relative to a horizontal direction.

7. The exhaust pipe assembly according to any one of claims 1 to 6, characterized in that: The exhaust pipe assembly further comprises a pipe connected to the outlet (22) of the flow guide device, the pipe extending to one side of the engine.

8. The exhaust pipe assembly according to any one of claims 1 to 6, characterized in that: The flow guide device (2) is connected to the exhaust elbow (1) below the opening (12) in a fluid-tight manner.

9. An engine, characterized in that: The engine includes an air filter and the exhaust pipe assembly according to any one of claims 1 to 8, wherein the air filter is located below the exhaust pipe assembly in the height direction of the engine.

10. An engineering machine, characterized in that: Comprising the exhaust pipe assembly according to any one of claims 1 to 8 or the engine according to claim 9.

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