Exhaust structure, exhaust device and engineering machinery

Abstract

The utility model discloses an exhaust structure, exhaust device and engineering machinery, including exhaust tail pipe and bend, the exhaust tail pipe is bent, the both ends of exhaust tail pipe are respectively equipped with first air inlet and first air outlet, the both ends of bend are respectively equipped with second air inlet and second air outlet, the first air inlet and second air outlet are equipped with second air inlet and second air outlet. One end of the bent pipe penetrates through the first air inlet so that the second air outlet can be located in one end of the exhaust tail pipe, and the exhaust tail pipe and the bent pipe are in exhaust injection fit. A partition plate is arranged in the other end of the exhaust tail pipe and is in a bent shape, the edge of one side of the partition plate is matched with the first air outlet in a split-flow mode, and the edge of the other side of the partition plate is matched with the second air outlet in a split-flow mode. The exhaust tail pipe is reasonable in structural design, and the exhaust backflow phenomenon can be effectively avoided by designing the bent plate (namely the partition plate) in the exhaust tail pipe.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to an exhaust structure, an exhaust device, and engineering machinery. Background Technology

[0002] The common exhaust systems of existing loaders are as follows: the air inlet of the muffler or after-treatment unit is connected to the exhaust port of the engine turbocharger, the exhaust port of the muffler or after-treatment unit is connected to the inlet of the bent pipe, and the outlet of the bent pipe is inserted into the exhaust tailpipe to play the role of exhaust ejection.

[0003] However, in actual use, it was found that the exhaust was not smooth and there was a high-temperature exhaust backflow phenomenon (the exhaust backflow phenomenon in the exhaust tailpipe was more serious when the ambient wind was 10m / s), which caused the after-processor wiring harness to burn out, and urgently needs to be improved.

[0004] The reason for the backflow is that when the airflow in the middle left part of the bend is discharged, it affects the smooth discharge of the exhaust gas on the right side. When the exhaust gas on the right side hits the top of the tailpipe, it is reflected back into the cabin.

[0005] Briefly explain the shortcomings of existing technologies:

[0006] The existing loader exhaust system has a problem with the bend in the exhaust pipe, the exhaust tailpipe, and the connection between the two, which causes high-temperature exhaust backflow, and this problem urgently needs to be solved. Utility Model Content

[0007] The purpose of this utility model is to provide an exhaust structure, exhaust device, and engineering machinery to solve the problem of high-temperature exhaust backflow caused by the bends in the exhaust system, exhaust tailpipe, and the coordination between the two in existing loader exhaust systems.

[0008] To achieve the above objectives, the present invention provides an exhaust structure, including an exhaust tailpipe and a bend. The exhaust tailpipe is bendable, and its two ends are respectively provided with a first air inlet and a first air outlet. The two ends of the bend are respectively provided with a second air inlet and a second air outlet. One end of the bend passes through the first air inlet, so that the second air outlet is located inside one end of the exhaust tailpipe. The exhaust tailpipe and the bend form an exhaust ejector. The other end of the exhaust tailpipe is provided with a baffle plate, which is bendable. One side edge of the baffle plate is connected to the first air outlet for flow diversion, and the other side edge of the baffle plate is connected to the second air outlet for flow diversion.

[0009] Furthermore, the partition includes a first diverter plate, a second diverter plate, and a third diverter plate connected in sequence. The first diverter plate is configured to divert air from the first air outlet, and the third diverter plate is configured to divert air from the second air outlet. There is a bending angle between the first diverter plate and the second diverter plate, and there is a bending angle between the second diverter plate and the third diverter plate.

[0010] Furthermore, the length of the first splitter plate from the first air outlet to the second splitter plate is 74.5±3mm, the first splitter plate is parallel to the upper inner surface of the exhaust tailpipe, and the distance between the first splitter plate and the upper inner surface of the exhaust tailpipe is 74mm±3mm.

[0011] Furthermore, the bending angle between the second diverter plate and the first diverter plate is 170±1°, and the length of the second diverter plate from the first diverter plate to the third diverter plate is 114±3mm.

[0012] Furthermore, the bending angle between the third flow divider and the second flow divider is 137±1°, and the length of the third flow divider extending from the second flow divider toward the second air outlet is 71.5±3mm.

[0013] Furthermore, the third diverter plate is perpendicular to the cross-section of the second air outlet, the center line of the third diverter plate is offset from that of the second air outlet, and there is a gap between the partition plate and the cross-section of the second air outlet.

[0014] Furthermore, the distance between the third diverter plate and the left side wall of the second air outlet when they are parallel is 79±3mm, the distance between the third diverter plate and the right side wall of the second air outlet when they are parallel is 53±3mm, and the interval between the partition plate and the cross section of the second air outlet is 48±3mm.

[0015] Furthermore, the bent pipe includes a first circular pipe, a second circular pipe, and a third circular pipe connected in sequence, with the second air inlet disposed on the third circular pipe and the second air outlet disposed on the first circular pipe, the first circular pipe passing through the first air inlet; there is a bending angle between the first circular pipe and the second circular pipe, and there is a bending angle between the second circular pipe and the third circular pipe; the thickness of the partition plate is 1±0.3mm; the exhaust tailpipe is an arc-shaped pipe.

[0016] This utility model also provides an exhaust device, including a hood, inside which a muffler or after-processor and an engine are provided; the hood is provided with an exhaust structure as described in any of the above technical solutions, a first air inlet is connected to the opening of the hood, the other end of the bent pipe is located inside the hood, a second air inlet is connected to the muffler or the after-processor, and the muffler or the after-processor is connected to the engine.

[0017] This utility model also provides an engineering machinery, including an engineering machinery body, and an exhaust structure or an exhaust device as described in any of the above technical solutions, wherein the exhaust structure or the exhaust device is disposed on the engineering machinery body.

[0018] In summary, the application of the technical solution of this utility model has the following beneficial effects: The structure of this utility model is reasonable. (1) By setting the exhaust tailpipe to be curved, the two ends of the exhaust tailpipe are respectively provided with a first air inlet and a first air outlet, the two ends of the curved pipe are respectively provided with a second air inlet and a second air outlet, and one end of the curved pipe passes through the first air inlet so that the second air outlet is located inside one end of the exhaust tailpipe. The exhaust tailpipe and the curved pipe form an exhaust ejection cooperation. Thus, in actual use, the air inlet of the muffler or after-processor can be connected to the turbocharger exhaust port of the engine, the exhaust port of the muffler or after-processor can be connected to the air inlet of the curved pipe (i.e. the second air inlet), and the air outlet of the curved pipe (i.e. the second air outlet) can be inserted into the exhaust tailpipe to play the role of exhaust ejection. (2) By setting a baffle inside the other end of the exhaust tailpipe, the baffle is curved, with one edge of the baffle cooperating with the first air outlet and the other edge of the baffle cooperating with the second air outlet; thus, the airflow discharged from the curved pipe can be divided into two parts, left and right, which do not affect each other, thereby achieving a good diversion effect and preventing exhaust gas backflow. From this analysis, it can be seen that compared with the prior art, this utility model can effectively avoid exhaust gas backflow by designing a curved plate (i.e., a baffle) in the exhaust tailpipe. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the exhaust device of this utility model;

[0020] Figure 2 This is a schematic diagram of the exhaust structure of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the exhaust structure of this utility model;

[0022] Explanation of reference numerals in the attached drawings: exhaust tailpipe (1), bend (2), engine hood (3), after-treatment unit (4), engine (5); first air intake (101), first air outlet (102), baffle (103), first splitter plate (1031), second splitter plate (1032), third splitter plate (1033); second air intake (201), second air outlet (202), first round pipe (203), second round pipe (204), third round pipe (205). Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0024] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 When observing, the observer's left side is designated as left, the observer's right side as right, the area in front of the observer as front, the area behind the observer as back, the area above the observer as top, and the area below the observer as bottom. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate the orientation or positional relationship based on the accompanying drawings. These are merely for the purpose of clearly describing the present invention and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0025] See Figures 1 to 3This embodiment provides an exhaust structure, including an exhaust tailpipe 1 and a bend 2. The exhaust tailpipe 1 is bendable, and its two ends are respectively provided with a first air inlet 101 and a first air outlet 102. The two ends of the bend 2 are respectively provided with a second air inlet 201 and a second air outlet 202. One end of the bend 2 passes through the first air inlet 101 so that the second air outlet 202 is located inside one end of the exhaust tailpipe 1. The exhaust tailpipe 1 and the bend 2 form an exhaust ejector engagement. The other end of the exhaust tailpipe 1 is provided with a baffle 103, which is bendable. One side edge of the baffle 103 is engaged with the first air outlet 102, and the other side edge of the baffle 103 is engaged with the second air outlet 202. Functions: (1) By setting the exhaust tailpipe in a curved shape, the two ends of the exhaust tailpipe are respectively provided with a first air inlet and a first air outlet, and the two ends of the curved pipe are respectively provided with a second air inlet and a second air outlet. One end of the curved pipe passes through the first air inlet so that the second air outlet is located inside one end of the exhaust tailpipe. The exhaust tailpipe and the curved pipe form an exhaust ejection cooperation; thus, in actual use, the air inlet of the muffler or after-processor can be connected to the exhaust port of the engine turbocharger, the exhaust port of the muffler or after-processor can be connected to the air inlet of the curved pipe (i.e., the second air inlet), and the air outlet of the curved pipe (i.e., the second air outlet) can be inserted into the exhaust tailpipe to play the role of exhaust ejection. (2) By setting a baffle inside the other end of the exhaust tailpipe, the baffle is curved. One side edge of the baffle is matched with the first air outlet for diversion, and the other side edge of the baffle is matched with the second air outlet for diversion; thus, the baffle can be used to divide the airflow discharged from the curved pipe into two parts, and the two parts of the airflow do not affect each other, thereby playing a good diversion role and avoiding exhaust gas backflow. Analysis shows that, compared with the prior art, this utility model can effectively avoid exhaust backflow by designing a bent plate (i.e., a baffle) in the exhaust tailpipe.

[0026] Specifically, the baffle 103 includes a first diverter plate 1031, a second diverter plate 1032, and a third diverter plate 1033 connected in sequence. The first diverter plate 1031 is configured to divert air from the first outlet 102, and the third diverter plate 1033 is configured to divert air from the second outlet 202. There is a bending angle between the first diverter plate 1031 and the second diverter plate 1032, and between the second diverter plate 1032 and the third diverter plate 1033. Function: Because the baffle 103 is a three-section bent plate, the first diverter plate 1031, the second diverter plate 1032, and the third diverter plate 1033 can respectively perform the functions of diverting air, transitioning air, and diverting air.

[0027] Specifically, the length of the first splitter plate 1031 from the first air outlet 102 to the second splitter plate 1032 is 74.5±3mm. The first splitter plate 1031 is parallel to the upper inner surface of the exhaust tailpipe 1, and the distance between the first splitter plate 1031 and the upper inner surface of the exhaust tailpipe 1 is 74mm±3mm. Function: By using the first section with a length of 74.5±3mm, parallel to the upper inner surface of the exhaust tailpipe, and a distance of 74mm±3mm, the splitter plate 1031 and the first air outlet 102 can be better coordinated.

[0028] Specifically, the bending angle between the second diverter plate 1032 and the first diverter plate 1031 is 170±1°, and the length of the second diverter plate 1032 from the first diverter plate 1031 to the third diverter plate 1033 is 114±3mm. Function: By using the angle of 170±1° between the second segment and the first segment, and the length of 114±3mm, a better transition fit is achieved in the second diverter plate 1032, thereby facilitating flow diversion.

[0029] Specifically, the bending angle between the third splitter plate 1033 and the second splitter plate 1032 is 137±1°, and the length of the third splitter plate 1033 extending from the second splitter plate 1032 toward the second air outlet 202 is 71.5±3mm. Function: By using the angle of 137±1° between the third and second sections and the length of 71.5±3mm, the flow distribution between the third splitter plate 1033 and the second air outlet 202 is better achieved.

[0030] Specifically, the third diverter plate 1033 is perpendicular to the cross-section of the second outlet 202, and the center lines of the third diverter plate 1033 and the second outlet 202 are offset and misaligned. There is a gap between the cross-section of the baffle plate 103 and the second outlet 202. Function: By ensuring that the third diverter plate 1033 is perpendicular to the cross-section of the bend insertion end and misaligned with the center line of the bend outlet, exhaust flow splitting will not fail when there is a misalignment between the tailpipe and the bend. Even if the left-right distance deviation of the bend in the exhaust tailpipe is within 20mm, the exhaust gas can still be discharged smoothly. The gap between the cross-section of the baffle plate 103 and the second outlet 202 facilitates the flow splitting coordination between the third diverter plate 1033 and the second outlet 202.

[0031] Specifically, the distance between the third diverter plate 1033 and the left side wall of the second outlet 202 when parallel is 79±3mm, the distance between the third diverter plate 1033 and the right side wall of the second outlet 202 when parallel is 53±3mm, and the interval between the partition plate 103 and the cross section of the second outlet 202 is 48±3mm. Function: This bent plate design, with its third section perpendicular to and not aligned with the bend outlet cross section, prevents exhaust flow failure when there is a misalignment between the tailpipe and the bend, effectively diverting the exhaust flow (dividing the airflow from the bend into two parts, left and right, which do not affect each other) and preventing exhaust backflow. Verification shows that even with the exhaust tailpipe shifted 20mm to the left or right, exhaust backflow is effectively avoided.

[0032] Specifically, the bend 2 includes a first circular pipe 203, a second circular pipe 204, and a third circular pipe 205 connected in sequence. A second air inlet 201 is located on the third circular pipe 205, and a second air outlet 202 is located on the first circular pipe 203. The first circular pipe 203 passes through the first air inlet 101. There is a bending angle between the first circular pipe 203 and the second circular pipe 204, and a bending angle between the second circular pipe 204 and the third circular pipe 205. The thickness of the baffle 103 is 1±0.3mm. The exhaust tailpipe 1 is an arc-shaped pipe. Function: The bend 2 and the exhaust tailpipe 1 work together to facilitate the exhaust ejection function; the 1±0.3mm thickness of the baffle 103 facilitates the diversion function and prevents exhaust gas backflow.

[0033] This utility model also provides an exhaust device, including a hood 3, inside which a muffler or after-treatment unit 4 and an engine 5 are provided; the hood 3 is provided with an exhaust structure according to any of the above technical solutions, a first air inlet 101 is connected to the opening of the hood 3, the other end of the bent pipe 2 is located inside the hood 3, a second air inlet 201 is connected to the muffler or after-treatment unit 4, and the muffler or after-treatment unit 4 is connected to the engine 5. Function: The air inlet of the muffler or after-treatment unit is connected to the turbocharger exhaust port of the engine, the exhaust port of the muffler or after-treatment unit is connected to the bent pipe air inlet (i.e., the second air inlet), and the bent pipe outlet (i.e., the second outlet) is inserted into the exhaust tailpipe, serving as an exhaust ejector; the baffle serves as a diversion function to prevent exhaust gas backflow.

[0034] This utility model also provides an engineering machinery, including the engineering machinery body, and an exhaust structure or exhaust device according to any of the above-mentioned technical solutions, wherein the exhaust structure or exhaust device is disposed on the engineering machinery body. Application: The exhaust structure and exhaust device are applicable to the exhaust systems of most engineering machinery, such as loaders.

[0035] In summary, the improvement is as follows: Compared with the prior art, this utility model can effectively avoid exhaust backflow by designing a specially shaped bent plate in the exhaust tailpipe. Even when the ambient wind is blowing directly at the tailpipe outlet at 10 m / s, there is no exhaust backflow. At the same time, even if the bent pipe and exhaust tailpipe are not in the designed position due to assembly errors, the exhaust gas can still be discharged smoothly without backflow problems.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An exhaust structure comprising an exhaust tail pipe (1) and an elbow pipe (2), characterized by: The exhaust tail pipe (1) is curved, and the two ends of the exhaust tail pipe (1) are respectively provided with a first air inlet (101) and a first air outlet (102); the two ends of the elbow pipe (2) are respectively provided with a second air inlet (201) and a second air outlet (202); one end of the elbow pipe (2) penetrates through the first air inlet (101), so that the second air outlet (202) is located inside one end of the exhaust tail pipe (1); the exhaust tail pipe (1) and the elbow pipe (2) form an exhaust injection fit; the inside of the other end of the exhaust tail pipe (1) is provided with a partition plate (103), the partition plate (103) is curved, one side edge of the partition plate (103) is in shunt cooperation with the first air outlet (102), and the other side edge of the partition plate (103) is in shunt cooperation with the second air outlet (202).

2. The exhaust structure according to claim 1, characterized by: The partition plate (103) comprises a first shunt plate (1031), a second shunt plate (1032) and a third shunt plate (1033) connected in sequence, the first shunt plate (1031) is in shunt cooperation with the first air outlet (102), and the third shunt plate (1033) is in shunt cooperation with the second air outlet (202); the first shunt plate (1031) and the second shunt plate (1032) have a bending angle, and the second shunt plate (1032) and the third shunt plate (1033) have a bending angle.

3. The exhaust structure according to claim 2, characterized by: The length of the first shunt plate (1031) from the first air outlet (102) to the second shunt plate (1032) is 74.5±3mm, the first shunt plate (1031) is parallel to the upper inner surface of the exhaust tail pipe (1), and the distance between the first shunt plate (1031) and the upper inner surface of the exhaust tail pipe (1) is 74mm±3mm.

4. The exhaust structure according to claim 2, characterized by: The bending angle between the second shunt plate (1032) and the first shunt plate (1031) is 170±1°, and the length of the second shunt plate (1032) from the first shunt plate (1031) to the third shunt plate (1033) is 114±3mm.

5. The exhaust structure according to claim 2, characterized by: The bending angle between the third shunt plate (1033) and the second shunt plate (1032) is 137±1°, and the length of the third shunt plate (1033) extending from the second shunt plate (1032) to the second air outlet (202) is 71.5±3mm.

6. The exhaust structure according to claim 2, characterized by: The third shunt plate (1033) is perpendicular to the cross section of the second air outlet (202), the third shunt plate (1033) is offset from the center line of the second air outlet (202), and the partition plate (103) has a spacing with the cross section of the second air outlet (202).

7. The exhaust structure according to claim 6, characterized by: The distance between the third flow distribution plate (1033) and the left side wall of the second gas outlet (202) when parallel is 79±3mm, the distance between the third flow distribution plate (1033) and the right side wall of the second gas outlet (202) when parallel is 53±3mm, and the distance between the partition plate (103) and the cross section of the second gas outlet (202) is 48±3mm.

8. The exhaust structure according to any one of claims 1 to 7, characterized by: The elbow pipe (2) comprises a first circular pipe (203), a second circular pipe (204) and a third circular pipe (205) connected in sequence, the second gas inlet (201) is arranged on the third circular pipe (205), the second gas outlet (202) is arranged on the first circular pipe (203), and the first circular pipe (203) passes through the first gas inlet (101); the first circular pipe (203) and the second circular pipe (204) have a bending angle, the second circular pipe (204) and the third circular pipe (205) have a bending angle; the thickness of the partition plate (103) is 1±0.3mm; and the exhaust tail pipe (1) is an arc-shaped pipe.

9. An exhaust device comprising a cowling (3) inside which there are a muffler or aftertreatment (4), an engine (5); characterized by the fact that: The exhaust structure of any one of claims 1 to 8 is arranged on the machine cover (3), the first gas inlet (101) is connected with the opening of the machine cover (3), the other end of the elbow pipe (2) is located in the interior of the machine cover (3), the second gas inlet (201) is connected with the muffler or the aftertreatment device (4), and the muffler or the aftertreatment device (4) is connected with the engine (5).

10. A working machine comprising a working machine body, characterised in that: The exhaust structure of any one of claims 1 to 8 or the exhaust device of claim 9 is arranged on the engineering machinery body.

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