A double-layer heat-insulated exhaust tailpipe

Abstract

This utility model relates to the field of exhaust tailpipe technology, specifically a double-layer heat-insulated exhaust tailpipe, comprising: an exhaust pipe, wherein the left end of the outer surface of the exhaust pipe is provided with an external threaded connection, and the right side of the exhaust pipe is provided with an annular groove; an outer tube, wherein the left end of the inner surface of the outer tube is provided with an internal threaded connection, and the right end of the outer tube is provided with an arc-shaped connection end, and the left side of the arc-shaped connection end is provided with a sealing protrusion; and a heat insulation pad, wherein the heat insulation pad is located between the exhaust pipe and the outer tube. This utility model allows for quick assembly and disassembly of the outer tube and the exhaust pipe as needed through a simple threaded connection, ensuring both heat insulation and sealing performance, while also improving its external aesthetics.

Description

Technical Field

[0001] This utility model relates to the field of exhaust tailpipe technology, specifically a double-layer heat-insulated exhaust tailpipe. Background Technology

[0002] Traditional single-layer exhaust pipes are in direct contact with high-temperature exhaust gases, resulting in high surface temperatures. When the vehicle is parked, passengers (especially children) or maintenance personnel may accidentally touch the hot exhaust pipe and suffer burns. In addition, the rear of the car usually houses components such as bumpers (made of plastic), body paint, and wiring harnesses. These materials will age, deform, or even melt if exposed to high temperatures for a long time. As a result, double-layer heat-insulated exhaust pipes have emerged on the market. Double-layer heat-insulated exhaust pipes are a special design component at the end of the car's exhaust system. Their structure consists of an inner exhaust pipe and an outer protective cover. There is usually an air gap or heat insulation material between the two layers, forming a double heat insulation barrier that can effectively protect the vehicle.

[0003] Currently, when using double-layer insulated exhaust tailpipes, if the inner exhaust pipe is damaged due to high temperature or corrosion (such as air leakage), the outer protective cover needs to be disassembled for repair. This is more complicated and costly than the direct replacement of a single-layer tailpipe. In addition, if the insulation material ages and falls off, the entire tailpipe may need to be replaced, further increasing maintenance costs. Therefore, we propose a double-layer insulated exhaust tailpipe. Utility Model Content

[0004] The purpose of this utility model is to provide a double-layer heat-insulated exhaust tailpipe, which has the advantages of convenient maintenance and cost-saving replacement. It solves the problem that if the inner exhaust pipe is damaged due to high temperature or corrosion during use, the outer protective cover needs to be removed for maintenance, which is more cumbersome and costly than direct replacement of a single-layer tailpipe. In addition, if the heat insulation material ages and falls off, the entire tailpipe may need to be replaced, further increasing maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-layer heat-insulated exhaust tailpipe, comprising:

[0006] An exhaust pipe is provided with an external threaded connection at the left end of its outer surface and an annular groove on the right side of the exhaust pipe.

[0007] The outer tube has an internal threaded connection at its left end and an arc-shaped connection at its right end, with a sealing ring on the left side of the arc-shaped connection.

[0008] A heat insulation pad, which is located between the exhaust pipe and the outer pipe.

[0009] Preferably, the inner wall of the outer tube is fixedly connected with a dispersion sheet, and there are multiple dispersion sheets, each with a different tilt angle.

[0010] Preferably, a decorative sleeve is fixedly connected to the right end of the outer surface of the outer tube, and the decorative sleeve is made of titanium alloy.

[0011] Preferably, the inner wall of the decorative tube sleeve and the outer surface of the outer tube are fixedly connected by a plurality of Z-shaped connectors distributed at equal angles.

[0012] Preferably, the inner surface of the middle end of the Z-shaped connector has a through hole.

[0013] Preferably, the exhaust pipe and the outer pipe are made of stainless steel, and the heat insulation pad is made of thick ceramic fiber cotton.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention uses a simple threaded connection to allow the outer tube and the exhaust pipe to be quickly assembled and disassembled as needed, ensuring both heat insulation and sealing, while also improving its external aesthetics. Attached Figure Description

[0016] Figure 1 This is a first-view structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention from a second perspective;

[0018] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 4 This is a schematic diagram of the fitting structure between the exhaust pipe and the exhaust pipe of this utility model;

[0020] Figure 5 This is a schematic diagram of the exploded structure of this utility model.

[0021] In the diagram: 1. Exhaust pipe; 101. External threaded connection; 102. Annular groove; 2. Outer tube; 201. Internal threaded connection; 202. Dispersion plate; 203. Arc-shaped connection end; 204. Sealing convex ring; 3. Heat insulation pad; 4. Decorative tube sleeve; 401. Z-shaped connector; 402. Through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The exhaust pipe 1, external threaded connection 101, annular groove 102, outer tube 2, internal threaded connection 201, dispersion plate 202, arc-shaped connection end 203, sealing convex ring 204, heat insulation pad 3, decorative tube sleeve 4, Z-shaped connector 401 and through hole 402 of this application are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0024] Example 1

[0025] Please see Figures 1-5 As shown, this utility model provides a technical solution: a double-layer heat-insulated exhaust tailpipe, comprising:

[0026] The exhaust pipe 1 has an external threaded connection part 101 at the left end of its outer surface and an annular groove 102 on its right side.

[0027] The outer tube 2 has an internal threaded connection 201 at its left end and an arc-shaped connection 203 at its right end. A sealing protrusion 204 is provided on the left side of the arc-shaped connection 203.

[0028] Heat insulation pad 3 is located between exhaust pipe 1 and outer pipe 2.

[0029] The exhaust pipe 1 and the outer pipe 2 are made of 304 stainless steel, and the heat insulation pad 3 is made of thick ceramic fiber cotton.

[0030] This technical solution: Through the cooperation of the external threaded connection part 101 and the internal threaded connection part 201 (currently, the most mainstream method is bracket welding connection, that is, the inner layer and the outer layer are rigidly fixed by metal brackets, which is the standard solution for most mass-produced vehicles. It has a simple structure, low cost and high reliability. Its design involves welding 3-4 evenly distributed small metal brackets on the outer wall of the inner exhaust pipe, and welding the other end of the bracket to the inner wall of the outer protective cover to form a "multi-point support" structure), the outer pipe 2 and the exhaust pipe 1 can be fixed by a threaded connection. Meanwhile, the outer tube 2 will drive the heat insulation pad 3 into the space between the outer tube 2 and the exhaust pipe 1, so that the structure can meet the design requirements of structural stability (avoiding vibration and abnormal noise), heat insulation (reducing heat conduction) and assembly process. When the outer tube 2 is connected to the exhaust pipe 1, it can drive the sealing convex ring 204 into the annular groove 102 through the arc-shaped connection end 203, thereby ensuring the sealing performance when the outer tube 2 is connected to the exhaust pipe 1. The right end of the outer tube 2 and the exhaust pipe 1 after connection is arc-shaped, which can improve the external aesthetics of the tailpipe.

[0031] Example 2

[0032] Based on Embodiment 1, this utility model is as follows: Figures 1-5 As shown, the inner wall of the outer tube 2 is fixedly connected with a dispersion plate 202. There are multiple dispersion plates 202, and the tilt angle of each dispersion plate 202 is different.

[0033] This technical solution: By setting the dispersion plate 202, the connection strength between the outer tube 2 and the heat insulation pad 3 can be enhanced. The arrangement of multiple heat insulation pads 3 with different tilt angles can disperse noise and improve the sound insulation effect of the exhaust tailpipe.

[0034] Example 3

[0035] Based on Embodiment 1, this utility model is as follows: Figures 1-5 As shown, a decorative tube sleeve 4 is fixedly connected to the right end of the outer surface of the outer tube 2, and the decorative tube sleeve 4 is made of titanium alloy. Multiple Z-shaped connectors 401 with equal angles are fixedly connected between the inner wall of the decorative tube sleeve 4 and the outer surface of the outer tube 2. A through hole 402 is opened on the inner surface of the middle end of the Z-shaped connector 401.

[0036] This technical solution: By setting the decorative tube sleeve 4, its outer side can be painted with a favorite color. At the same time, the decorative tube sleeve 4 can further insulate heat. The multiple Z-shaped connectors 401 distributed at equal angles can improve the connection strength between the decorative tube sleeve 4 and the outer tube 2. With the assistance of the through hole 402, a tool can be inserted into its inner side. When rotated, it can drive the decorative tube sleeve 4 and the outer tube 2 to move synchronously, which facilitates the user or maintenance personnel to disassemble, maintain or replace the corresponding parts of the outer tube 2. The operation is simple and convenient.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A double-layer insulated exhaust tailpipe, characterized in that, include: An exhaust pipe (1) is provided with an external threaded connection part (101) on the left end of the outer surface of the exhaust pipe (1) and an annular groove (102) is provided on the right side of the exhaust pipe (1). The outer tube (2) has an internal threaded connection part (201) at the left end of the inner side and an arc-shaped connection end (203) at the right end. A sealing protrusion ring (204) is provided on the left side of the arc-shaped connection end (203). Heat insulation pad (3) is located between exhaust pipe (1) and outer pipe (2).

2. The double-layer insulated exhaust tailpipe according to claim 1, characterized in that: The inner wall of the outer tube (2) is fixedly connected with a dispersion plate (202), and there are multiple dispersion plates (202), each of which has a different tilt angle.

3. The double-layer insulated exhaust tailpipe according to claim 1, characterized in that: A decorative tube sleeve (4) is fixedly connected to the right end of the outer surface of the outer tube (2), and the decorative tube sleeve (4) is made of titanium alloy.

4. A double-layer insulated exhaust tailpipe according to claim 3, characterized in that: The inner wall of the decorative tube sleeve (4) and the outer surface of the outer tube (2) are fixedly connected by a plurality of Z-shaped connectors (401) distributed at equal angles.

5. A double-layer insulated exhaust tailpipe according to claim 4, characterized in that: A through hole (402) is provided on the inner surface of the middle end of the Z-shaped connector (401).

6. The double-layer insulated exhaust tailpipe according to claim 1, characterized in that: The exhaust pipe (1) and the outer pipe (2) are made of 304 stainless steel, and the heat insulation pad (3) is made of thick ceramic fiber cotton.

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