Exhaust gas guiding device and construction machine
By designing a fixed connection between the exhaust tail pipe and the hood, the exhaust pipe plug is connected and an exhaust gas guide device that avoids the gap, the problem of the exhaust gas guide device affecting the opening of the hood and the damage of the silencer in the prior art is solved, and the smoothness and noise control of the opening and closing of the hood is achieved.
Patent Information
- Application Number
- CN202422545066.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-22
AI Technical Summary
The installation of exhaust gas guidance devices on existing construction machinery affects the opening of the hood and may damage the muffler.
An exhaust gas guide device is designed, in which the exhaust tailpipe is fixedly connected to the hood, the exhaust pipe is connected to the exhaust tailpipe plug, a gap is provided to avoid interference, and stability is enhanced by bolting the connection plate, and the lower end of the exhaust pipe has an axial gap for easy insertion.
It realizes that the muffler is not affected when opening and closing the hood, avoids damage caused by vibration, and reduces noise leakage.
Smart Images
Figure CN223136244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine exhaust emission, and more specifically, to an exhaust gas guiding device and construction machinery. Background Art
[0002] Most construction machinery uses an engine as a power device, and the engine exhaust is discharged outward through a muffler. The muffler of construction machinery is usually installed under the engine hood. In order to discharge the exhaust gas, an exhaust gas guiding device is provided at the exhaust port of the muffler.
[0003] In the existing construction machinery, the lower end of the exhaust pipe of the exhaust gas guiding device is fixedly connected to the muffler, and the upper end is exposed outside the engine hood. The engine hood is used to isolate the components below it from the outside. However, construction machinery often needs to be repaired or maintained, and during this process, the engine hood needs to be opened. The fixed connection structure between the exhaust pipe and the muffler in the existing exhaust gas guiding device affects the opening of the engine hood. In addition, during the operation of a diesel engine, due to large vibrations, an overly long integral exhaust gas guiding device may cause damage to the muffler. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is the problem that the installation of the exhaust gas guiding device on the existing construction machinery affects the opening of the engine hood and may damage the muffler, and to provide an exhaust gas guiding device and construction machinery.
[0005] The technical solution for the utility model to achieve its purpose is: an exhaust gas guiding device, which includes an engine hood that can be flipped open and closed around its hinge pin, a muffler installed below the engine hood, and an exhaust tail pipe fixedly connected to the engine hood. The lower end of the exhaust tail pipe extends below the engine hood, and the upper end of the exhaust pipe on the muffler is inserted into the inner hole of the lower end of the exhaust tail pipe, and the part where the exhaust tail pipe is sleeved with the exhaust pipe has a radial gap.
[0006] In the exhaust gas guiding device of the utility model, an avoidance notch for the exhaust tail pipe to avoid the upper end of the exhaust pipe when the engine hood is flipped open and closed is provided on the pipe wall at the lower end of the exhaust tail pipe and / or an avoidance notch for the exhaust pipe to avoid the lower end of the exhaust tail pipe when the engine hood is flipped open and closed is provided at the upper end of the exhaust pipe. Further, the upper part of the avoidance notch on the exhaust tail pipe and / or the lower part of the avoidance notch on the exhaust pipe is arc-shaped.
[0007] In the exhaust gas guiding device of the utility model, a mounting plate is welded on the exhaust tail pipe, and the mounting plate is fixedly connected to the engine hood through bolts. Further, the mounting plate includes a connecting plate welded to the exhaust tail pipe by a support plate. The connecting plate is attached to the engine hood and fixedly connected through bolts; the support plate is arranged below the connecting plate and is welded to both the connecting plate and the exhaust tail pipe at the same time.
[0008] In the exhaust gas guiding device of the present utility model, the lower end of the exhaust pipe is sleeved on the air outlet connecting pipe of the muffler, and a locking clamp is arranged at the sleeved position.
[0009] In the exhaust gas guiding device of the present utility model, the lower end of the exhaust pipe has an axial gap for expanding and contracting the radial dimension of the lower end of the inner hole of the exhaust pipe.
[0010] In the exhaust gas guiding device of the present utility model, the exhaust pipe has a corrugated section for bending the exhaust pipe.
[0011] In the exhaust gas guiding device of the present utility model, the length of the exhaust pipe is not greater than 20 cm.
[0012] The technical solution of the present utility model to achieve its purpose is: a construction machinery, which has the aforementioned exhaust gas guiding device.
[0013] Compared with the prior art, in the exhaust gas guiding device of the present utility model, the exhaust tail pipe is fixedly connected to the engine hood and is connected to the exhaust pipe by an insertion sleeve connection. When the engine hood is opened and closed, the exhaust tail pipe and the exhaust pipe can be disengaged or inserted and sleeved by themselves. The exhaust gas guiding device will not affect the opening and closing of the engine hood, and the exhaust tail pipe will not exert a force on the exhaust pipe of the muffler, and its vibration will not damage or even affect the muffler. Description of the Drawings
[0014] Figure 1 is the structural schematic diagram of the exhaust gas guiding device of the present utility model Figure 1 。
[0015] Figure 2 is the structural schematic diagram of the exhaust gas guiding device of the present utility model Figure 2 。
[0016] Figure 3 is the structural schematic diagram of the exhaust tail pipe in the exhaust gas guiding device of the present utility model.
[0017] Figure 4 is the structural schematic diagram of the exhaust pipe of the muffler in the exhaust gas guiding device of the present utility model.
[0018] Names and serial numbers of components in the figure:
[0019] Muffler 10, exhaust pipe 11, clamp 12, axial gap 13.
[0020] Engine hood 20.
[0021] Exhaust tail pipe 31, connecting plate 32, support plate 33, bolt 34, avoidance notch 35. Detailed Embodiment
[0022] The following describes the specific implementation plan with reference to the drawings.
[0023] As shown Figure 1 Figure 2 in the figure, the exhaust gas guiding device includes a hood 20 that can be turned over and opened or closed around its hinge pin, a muffler 10 installed below the hood 20, and an exhaust tail pipe 31 fixedly connected to the hood. The lower end of the exhaust tail pipe 31 extends below the hood 20. The upper end of the exhaust pipe 11 on the muffler 10 is inserted into the lower end of the exhaust tail pipe 31, and there is a radial gap between the inserted parts of the exhaust tail pipe 31 and the exhaust pipe 11.
[0024] On the pipe wall at the lower end of the exhaust tail pipe 31, there is an avoidance notch 35 for the exhaust tail pipe 31 to avoid the upper end of the exhaust pipe 11 when the hood 20 is turned over and opened or closed. The upper part of the avoidance notch 35 is arc-shaped.
[0025] As shown Figure 2 in the figure, the hood 20 is installed through a pin or hinge and can rotate around its hinge center point A to realize the turning over and opening or closing of the hood 20. Since the exhaust tail pipe 31 is fixedly connected to the hood 20 and the connection between the exhaust tail pipe 31 and the exhaust pipe 11 is an insertion connection, when the hood 20 is opened or closed, the exhaust tail pipe 31 and the exhaust pipe 11 can be disconnected or inserted by themselves, and the exhaust gas guiding device will not affect the opening or closing of the hood 20.
[0026] As shown Figure 2 in the figure, there is a partially overlapping part between the lower end of the exhaust tail pipe 31 and the upper end of the exhaust pipe 11, and there is a certain gap in this overlapping part. The length of the overlapping part between the exhaust tail pipe 31 and the exhaust pipe 11 and the size of the gap between them are related to the noise reduction effect. If the overlapping length is too short and the gap is too large, there will be a serious sound leakage phenomenon, resulting in an increase in the overall machine noise. To avoid serious sound leakage, the overlap degree (the length of the socket overlap) and the gap between the exhaust tail pipe 31 and the exhaust pipe 11 need to be controlled below a certain size. However, if the overlap degree is too large and the gap is too small, when the hood is opened or closed, the exhaust tail pipe 31 and the upper end of the exhaust pipe 11 will interfere. To balance the overlap degree, the gap, and small sound leakage, an avoidance notch 35 is provided at the lower end of the exhaust tail pipe 31. As shown Figure 2 Figure 3 in the figure, the avoidance notch 35 on the exhaust tail pipe 31 is provided on one side of the lower end of the exhaust tail pipe 31 facing the hinge center point A of the hood. The avoidance notch 35 on the exhaust tail pipe 31 can prevent the exhaust tail pipe 31 from interfering with the upper part of the exhaust pipe 11 when the hood 20 is turned over. Optionally, the upper part of the avoidance notch 35 on the exhaust tail pipe 31 is arc-shaped. For the same purpose, an avoidance notch can also be provided on the upper part of the exhaust pipe 11, and the avoidance notch on the exhaust pipe 11 is provided on one side of the upper end of the exhaust pipe 11 facing away from the hinge center point A of the hood. In addition, avoidance notches can also be provided at the same time on the lower end of the exhaust tail pipe 31 and the upper end of the exhaust pipe 11.
[0027] As shown Figure 1As shown, a mounting plate is welded on the exhaust tail pipe, and the mounting plate is fixedly connected to the hood by bolts. In order to strengthen the connection strength between the mounting plate and the exhaust tail pipe 31 and facilitate the installation of the exhaust tail pipe 31, the mounting plate includes a connecting plate 32 and a supporting plate 33. The connecting plate 32 is welded to the exhaust tail pipe 31 and fits with the hood 20 and is fixedly connected by bolts 34; the supporting plate 33 is arranged below the connecting plate 32 and is welded to the connecting plate 32 and the exhaust tail pipe 31 at the same time. The supporting plate 33 is provided to enhance the strength between the exhaust tail pipe 31 and the connecting plate 32.
[0028] like Figure 1 As shown, the lower end of the exhaust pipe 11 is sleeved on the outlet interface pipe of the muffler 10 and a locking clamp 12 is provided at the sleeve. The clamp 12 increases the connection strength between the exhaust pipe 11 and the outlet interface pipe of the muffler 10. Figure 4 As shown, the lower end of the exhaust pipe 11 has an axial gap 13 for radial expansion and contraction. The axial gap 13 increases the tolerance of the lower end of the exhaust pipe and facilitates the fitting and plugging between the exhaust pipe 11 and the outlet interface pipe of the muffler 10.
[0029] Optionally, the exhaust pipe 11 has a corrugated section for pipe bending. When the hood is closed, the exhaust pipe can be bent at the corrugated section so that the upper end of the exhaust pipe is bent toward the exhaust tail pipe 31. When the hood is not completely closed, the exhaust tail pipe 31 is butted against the upper end of the exhaust pipe 11. As the hood continues to close, the insertion depth between the exhaust tail pipe 31 and the exhaust pipe 11 increases, and the exhaust tail pipe 31 also pushes the exhaust pipe 11 to bend.
[0030] Optionally, the length of the exhaust pipe 11 is not greater than 20 cm.
[0031] This embodiment also provides a construction machinery having the aforementioned exhaust gas guiding device. The construction machinery may be an excavator, or a mechanical equipment with a design modification based on the upper rotating body of an excavator, such as a pile-driving machine, etc. The construction machinery may also be a loader or a grader, etc.
Claims
1. An exhaust gas guiding device, characterized in that, It includes a hood that can be flipped open and closed around its hinge pin shaft, a muffler installed below the hood, and an exhaust tail pipe fixedly connected to the hood. The lower end of the exhaust tail pipe extends below the hood. The upper end of the exhaust pipe on the muffler is inserted into the inner hole at the lower end of the exhaust tail pipe, and there is a radial gap between the part of the exhaust tail pipe sleeved with the exhaust pipe.
2. The exhaust gas guiding device according to claim 1, characterized in that, A relief notch for the exhaust tail pipe to avoid the upper end of the exhaust pipe when the hood is flipped open and closed is provided on the pipe wall at the lower end of the exhaust tail pipe and / or a relief notch for the exhaust pipe to avoid the lower end of the exhaust tail pipe when the hood is flipped open and closed is provided at the upper end of the exhaust pipe.
3. The exhaust gas guiding device according to claim 2, characterized in that, The upper part of the relief notch on the exhaust tail pipe and / or the lower part of the relief notch on the exhaust pipe is arc-shaped.
4. The exhaust gas guiding device according to any one of claims 1 to 3, characterized in that A mounting plate is welded on the exhaust tail pipe, and the mounting plate is fixedly connected to the hood by bolts.
5. The exhaust gas guiding device according to claim 4, characterized in that, The mounting plate includes a connecting plate welded to the support plate and the exhaust tail pipe. The connecting plate is in contact with the hood and fixedly connected by bolts; the support plate is arranged below the connecting plate and is welded to both the connecting plate and the exhaust tail pipe at the same time.
6. The exhaust gas guiding device according to any one of claims 1 to 3, characterized in that, The lower end of the exhaust pipe is sleeved on the air outlet connecting pipe of the muffler, and a locking clamp is provided at the sleeved part.
7. The exhaust gas guiding device according to claim 6, characterized in that, The lower end of the exhaust pipe has an axial slit for expanding and contracting the radial dimension of the lower end of the inner hole of the exhaust pipe.
8. The exhaust gas guiding device according to claim 6, characterized in that, There is a corrugated section on the exhaust pipe for the exhaust pipe to bend.
9. The exhaust gas guiding device according to claim 6, characterized in that, The length of the exhaust pipe is not more than 20 cm.
10. An engineering machinery, characterized in that, It has the exhaust gas guiding device according to any one of claims 1 to 9.