Exhaust tailpipe limiting device

Abstract

The utility model provides an exhaust tail pipe stop device belongs to tractor exhaust tail pipe structure technical field. Its technical scheme is: an exhaust tail pipe stop device includes: exhaust connecting pipe, welding fixed in the outer wall of exhaust connecting pipe's locating block, the distance of locating block from exhaust connecting pipe tail end top surface is 80-120mm, exhaust tail pipe, its pipe wall sets up the aperture of matching with locating block shape, exhaust pipe clamp, be located at exhaust tail pipe aperture, exhaust tail pipe passes through exhaust pipe clamp and is installed in exhaust connecting pipe tail end. The aperture and locating block inlayed connection are used for limiting exhaust tail pipe circumferential rotation. Advantageous effects are: through welding locating block on exhaust connecting pipe, set up the aperture of inlaying with locating block on exhaust tail pipe, prevent exhaust tail pipe from rotating, this limit mode is relatively simple to dismount, the precision requirement of manufacture is not high, and the production cost is low, and adopts the welding mode connection, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the technical field of tractor exhaust tailpipe structure, and in particular to an exhaust tailpipe limiting device. Background Technology

[0002] The tractor exhaust tailpipe is the final component of the engine exhaust system, serving as the outlet pipe for the engine's combustion exhaust gases to be released into the atmosphere. It is an indispensable part of the tractor. The exhaust tailpipe not only discharges exhaust gases, but its design at the end helps prevent rainwater, dust, and other foreign objects from flowing back into the exhaust system, protecting the engine and exhaust aftertreatment devices. The specific exhaust direction also prevents exhaust gases from blowing towards the ground and stirring up dust, or directly towards the operator.

[0003] Currently, tractors operate in harsh environments, mostly dusty, debris-filled, and wet conditions with uneven surfaces. This inevitably causes the vehicle to shake, which over time can lead to the exhaust tailpipe rotating. This poses significant risks, such as the upper part of the tailpipe colliding with surrounding objects and exhaust fumes blowing towards the driver. Existing exhaust tailpipe limiting methods on the market are rare, and disassembling and assembling the tailpipe is complex, resulting in poor applicability. For example...

[0004] 1. Flange connection for limiting: Flanges are welded to the end of the exhaust connection pipe and the end of the exhaust tailpipe, and the two are connected by high-strength bolts. The connection is rigid and has good sealing performance; however, flange connection for limiting requires high manufacturing precision and is relatively complicated to disassemble and assemble.

[0005] 2. Use a special metal bracket to fix or clamp the exhaust tailpipe. The bracket itself is fixed with bolts. Although this method is reliable, the fixing method is complicated and the service life is short.

[0006] 3. Using clamp-type fixing and limiting: The bottom of the exhaust tailpipe is made into an flared end, inserted into the exhaust connection pipe, and then fixed by clamp. This fixing method is simple and easy to disassemble, but it requires high precision of the pipe opening. Long-term vibration may cause the exhaust tailpipe to rotate on its own.

[0007] Therefore, there is an urgent need for a low-cost and long-term usable limit device to solve the above technical problems. Utility Model Content

[0008] The purpose of this utility model is to overcome the problems in the background technology and provide an exhaust tailpipe limiting device that is easy to assemble and disassemble, has low precision requirements, and has a long service life. This limiting device can prevent the exhaust tailpipe from rotating on its own. The exhaust tailpipe limiting device is welded to the exhaust connecting pipe, which does not affect the tractor's usability and overall aesthetics, while ensuring the effective fixation of the exhaust tailpipe.

[0009] To achieve the aforementioned objectives, the present invention employs the following technical solution: an exhaust tailpipe limiting device, comprising:

[0010] Exhaust connection pipe;

[0011] A positioning block is welded and fixed to the outer wall of the exhaust connection pipe, and the distance between the positioning block and the top surface of the tail end of the exhaust connection pipe is 80-120mm;

[0012] The exhaust tailpipe has a notch in its wall that matches the shape of the positioning block;

[0013] An exhaust pipe clamp is provided at the notch of the exhaust tailpipe, and the exhaust tailpipe is installed at the end of the exhaust connecting pipe through the exhaust pipe clamp.

[0014] The notch is fitted and connected to the positioning block to restrict the circumferential rotation of the exhaust tailpipe;

[0015] Furthermore, the notch is a rectangular or trapezoidal structure, and its depth is 1.5-2 times the wall thickness of the exhaust tailpipe.

[0016] Furthermore, the positioning block is a metal block, and its welding surface with the exhaust connecting pipe is an arc-shaped curved surface with a radius of curvature consistent with the outer diameter of the exhaust connecting pipe.

[0017] Furthermore, the positioning block is made of a metal material with a thermal conductivity ≥40W / (m·K).

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model prevents the exhaust tailpipe from rotating by welding a positioning block onto the exhaust connecting pipe and setting a notch on the exhaust tailpipe that fits into the positioning block. This limiting method is relatively simple to assemble and disassemble, does not require high manufacturing precision, and uses a welding method to ensure tightness without increasing costs and extending service life. At the same time, this fixing method is simple and can be used interchangeably with other vehicle models. The heat conduction method ensures heat dissipation and eliminates the need to consider the possibility of the positioning block being burned by high temperatures in the exhaust connecting pipe and exhaust tailpipe. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] The attached diagram is labeled as follows: 1. Exhaust connecting pipe; 2. Positioning block; 3. Exhaust tailpipe; 4. Exhaust pipe clamp. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0023] Example 1:

[0024] like Figure 1 As shown, this embodiment provides an exhaust tailpipe limiting device, including:

[0025] Exhaust connection pipe 1: Made of high-temperature resistant alloy steel pipe, with an outer diameter of φ60mm and a wall thickness of 3mm;

[0026] Positioning block 2: A rectangular metal block with dimensions of 20mm × 15mm × 8mm. The welding surface between this block and the exhaust connecting pipe 1 is an arc-shaped curved surface with a radius of curvature R = 30mm (consistent with the outer diameter of the exhaust connecting pipe). This positioning block is made of Q235 carbon steel with a thermal conductivity ≥40W / (m·K) and is welded and fixed to the outer wall of the exhaust connecting pipe 1 at a distance of 100mm from the top surface of the tail end (within the range of 80-120mm).

[0027] Exhaust tailpipe 3: A rectangular notch (18mm long × 10mm wide) is opened in its pipe wall, and the notch depth is 5mm (1.67 times the exhaust tailpipe wall thickness of 3mm, which meets the 1.5-2 times requirement);

[0028] Exhaust pipe clamp 4: Use a high-strength stainless steel clamp (model JUB-50) and install it directly at the notch of the exhaust tailpipe 3.

[0029] Installation steps:

[0030] 1. Weld the positioning block 2 to the designated position of the exhaust connection pipe 1 by arc welding, and control the welding temperature at 1200-1300℃;

[0031] 2. Align the rectangular notch of the exhaust tailpipe 3 vertically with the positioning block 2 and insert it into the exhaust connecting pipe 1, ensuring the notch is fully engaged with the positioning block. Figure 1 As shown, at this time, the positioning block 2 restricts the exhaust tailpipe 3 from rotating circumferentially;

[0032] 3. Tighten the bolts with a torque of 15 N·m to complete the connection between the exhaust connection pipe 1 and the exhaust tailpipe 3.

[0033] Technical effects:

[0034] The notch and the positioning block fit together completely eliminate the risk of tailpipe self-rotation, and no deflection greater than 0.5° was observed during the vibration test;

[0035] The arc-shaped welding surface increases the contact area between the positioning block and the pipe wall by 40%, improving heat dissipation efficiency (the positioning block is only 210°C when the tail pipe is 500°C in actual measurement).

[0036] The clamp is directly fixed to the notch, forming a double anti-rotation mechanism.

[0037] Example 2:

[0038] The technical features that differ from Example 1 are as follows: the notch is changed to a trapezoidal structure (top bottom 10mm / bottom bottom 14mm / height 15mm), with a depth of 6mm (twice the wall thickness of 3mm); the radius of curvature of the welding surface of the positioning block is adjusted to R=45mm (to fit large-diameter exhaust connection pipes).

[0039] Effect: The trapezoidal notch enhances shear resistance, and no notch deformation was observed during tractor bump tests.

[0040] Example 3:

[0041] Technical features that distinguish the positioning block 2: The material of the positioning block 2 is replaced with T2 copper with a thermal conductivity of 238W / (m·K), and the welding position is set to 80mm from the tail end.

[0042] Results: Under high-temperature exhaust gas conditions (650℃), the temperature of the positioning block is only 185℃, with no thermal deformation.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An exhaust tailpipe limiting device, characterized in that, include: Exhaust connection pipe (1); A positioning block (2) is welded and fixed to the outer wall of the exhaust connection pipe (1), and the distance between the positioning block (2) and the top surface of the tail end of the exhaust connection pipe (1) is 80-120mm. The exhaust tailpipe (3) has a notch in its wall that matches the shape of the positioning block (2); An exhaust pipe clamp (4) is provided at the notch of the exhaust tail pipe (3), and the exhaust tail pipe (3) is installed at the end of the exhaust connecting pipe (1) through the exhaust pipe clamp (4); The notch is fitted and connected to the positioning block (2) to restrict the circumferential rotation of the exhaust tailpipe (3).

2. The exhaust tailpipe limiting device according to claim 1, characterized in that, The notch is a rectangular or trapezoidal structure, and its depth is 1.5-2 times the wall thickness of the exhaust tailpipe (3).

3. The exhaust tailpipe limiting device according to claim 1, characterized in that, The positioning block (2) is a metal block, and its welding surface with the exhaust connecting pipe (1) is an arc-shaped curved surface with a radius of curvature consistent with the outer diameter of the exhaust connecting pipe (1).

4. The exhaust tailpipe limiting device according to claim 1, characterized in that, The positioning block (2) is made of a metal material with a thermal conductivity of ≥40W / (m·K).

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