CN220151418U

CN220151418U - Metal corrugated telescopic exhaust pipe

Info

Publication number: CN220151418U
Application number: CN202321697260.XU
Authority: CN
Inventors: 杨建强; 杨永刚
Original assignee: Hubei Kangqiang Power Technology Co ltd
Current assignee: Hubei Kangqiang Power Technology Co ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-12-08
Anticipated expiration: 2033-06-29

Abstract

The utility model discloses a metal corrugated telescopic exhaust pipe which comprises a double-layer corrugated pipe body, a flange and a positioning structure. The double-layer corrugated pipe body is made of corrugated high-temperature-resistant and corrosion-resistant metal materials and is divided into a first corrugated section, a flat section and a second corrugated section, so that vibration of an engine can be effectively absorbed. The flange is made of elastic material, is embedded with a steel ring, improves the stability and strength of the flange, and is connected with the exhaust port and the silencer through the mounting hole. The positioning structure comprises a positioning ring and a positioning clamping groove and is used for fixing the exhaust pipe. The utility model solves the problems of poor vibration absorption effect and poor stability of the exhaust pipe in the prior art, realizes more excellent vibration absorption performance, is easy to install, and has strong working stability and durability.

Description

Metal corrugated telescopic exhaust pipe

Technical Field

The utility model relates to the technical field of mechanical engineering, in particular to a metal corrugated telescopic exhaust pipe for an exhaust system of a diesel engine.

Background

One of the important components of an automotive exhaust system is the exhaust pipe, which is a conduit for directing exhaust gases from an engine to the exterior of the vehicle. In order to adapt to thermal expansion and vibration generated during the running process of the engine, a specially designed pipeline, namely a metal corrugated telescopic exhaust pipe, is usually used at the connection part of the exhaust pipe, the engine and the silencer. The corrugated design of the metal corrugated telescopic exhaust pipe can effectively absorb and relieve vibration and thermal expansion and protect the engine and other parts of the vehicle.

At present, most of metal corrugated telescopic exhaust pipes in the market adopt a single-layer metal pipe body design, and the materials of the metal corrugated telescopic exhaust pipes are mainly metals with high temperature resistance and good mechanical properties, such as stainless steel or aluminum alloy. While these materials are somewhat capable of withstanding the thermal expansion and vibration generated by the engine, their performance is still inadequate when dealing with vibrations of higher frequency or greater amplitude. In addition, such single-layer design exhaust pipes often require additional fastening and positioning devices at the junction to ensure stability of the exhaust pipe during vehicle travel.

However, the current corrugated metal telescopic exhaust pipe still has room for improvement in the performance of handling high frequency or large amplitude vibrations, especially in the effect of absorbing and damping vibrations. Furthermore, reliance on fixed and positioning equipment not only increases the complexity of the installation of the exhaust pipe, but may also affect its stability and durability under extreme operating conditions. Therefore, how to design a novel metal corrugated telescopic exhaust pipe to provide more excellent vibration absorbing performance, and at the same time, simplify the installation process and improve the working stability and durability thereof has become a current technical challenge.

Disclosure of Invention

In order to solve the problems in the prior art, the embodiment of the utility model provides a metal corrugated telescopic exhaust pipe. The technical scheme is as follows:

on one hand, the utility model provides a metal ripple flexible blast pipe, including double-deck ripple body, flange and location structure, wherein, double-deck ripple body comprises inlayer body and outer body, is filled with shock attenuation material between inlayer body and the outer body, and inlayer body is made by the high temperature resistant, corrosion resistant metal material that has the ripple; the flanges are respectively arranged at two ends of the double-layer corrugated pipe body, are made of materials with certain elasticity, are embedded with steel rings to provide strength, and are used for connecting the double-layer corrugated pipe body with an exhaust port and a silencer of the engine; the positioning structure comprises a positioning ring and a positioning clamping groove, the positioning ring is arranged at the joint of the corrugated pipe body and the flange, the positioning clamping groove is arranged on the side face of the flange, a connecting bolt is inserted into the positioning clamping groove, and the connecting part of the positioning clamping groove, the engine and the silencer is fixed through the connecting bolt.

Further, the double-layer corrugated pipe body is of a multi-section structure and comprises a first corrugated section, a leveling section and a second corrugated section, wherein the first corrugated section and the second corrugated section are respectively arranged on two sides of the leveling section, and the outer ends of the first corrugated section and the second corrugated section are connected with flanges.

Further, the embedded steel ring on the flange is made of stainless steel and is distributed at the peripheral part of the flange so as to enhance the stability and strength of the flange.

Further, the locating ring is fixed on the outer side of the joint of the outer layer pipe body and the flange, and the locating clamping groove is semicircular in shape so as to be suitable for connecting bolts with various shapes.

Further, the shock absorbing material fills the entire length between the inner tube body and the outer tube body; the shock absorbing material is made of silica gel to optimize shock absorbing capacity.

Further, the flange is provided with a mounting hole.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

through adopting double-deck bellows body structure to pack damping material between inside and outside body, can absorb and alleviate the vibration of different frequency and amplitude that the engine produced in the operation in-process effectively, thereby improved vibration absorption and damped effect. In particular, the multi-segment design of the double-layer bellows body (including the first bellows segment, the flat segment, and the second bellows segment) may provide a more specialized damping effect for different vibration characteristics of the engine under different operating conditions.

By embedding the steel ring in the flange, the stability and strength of the flange can be improved, so that the stability and durability of the exhaust pipe under extreme working conditions are improved.

Through setting up location structure (including holding ring and location draw-in groove), can simplify the installation of blast pipe to ensure the stability of blast pipe in the vehicle in-process of traveling. The positioning structure is ingenious in design, the influence of vibration of the engine on the silencer can be reduced, and meanwhile, the connecting bolts with various shapes are adapted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a corrugated metal telescopic exhaust pipe according to an embodiment of the present utility model;

fig. 2 is a schematic view of a flange in an embodiment of the utility model.

In the figure, 1 is a double-layer corrugated pipe body, 11 is a first corrugated section, 12 is a flat section, and 13 is a second corrugated section; 2 is a flange, and 21 is a mounting hole; 3 is a positioning mechanism, 31 is a positioning ring; and 4 is a connecting bolt.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

The utility model provides a metal corrugated telescopic exhaust pipe, which comprises a double-layer corrugated pipe body 1, a flange 2 and a positioning structure 3, and is fixed by using a connecting bolt 4, as shown in figures 1 and 2.

The double-layer corrugated pipe body 1 is composed of an inner layer pipe body and an outer layer pipe body, wherein the inner layer pipe body and the outer layer pipe body are made of corrugated high-temperature-resistant and corrosion-resistant metal materials, such as stainless steel or aluminum alloy can be selected. The double-layer corrugated pipe body 1 is designed into a multi-section structure and comprises a first corrugated section 11, a leveling section 12 and a second corrugated section 13, wherein the first corrugated section 11 and the second corrugated section 13 are respectively arranged on two sides of the leveling section 12. The multi-section design can provide more targeted damping effect according to different vibration frequencies and amplitudes generated by the engine under different working conditions. A shock absorbing material such as silica gel is filled between the inner and outer tube bodies, which can optimize shock absorbing capacity, and which extends through the entire length between the inner and outer tube bodies.

In this embodiment, in the metal corrugated expansion exhaust pipe of this utility model, the double-layered corrugated pipe body is a very critical part. The pipe body consists of an inner layer pipe body and an outer layer pipe body, which are made of high-temperature-resistant and corrosion-resistant metal materials and have a corrugated design. For example, stainless steel or aluminum alloy can be used as the material for the fabrication because these materials have excellent high temperature and corrosion resistance.

A shock absorbing material, such as silica gel, is filled between the inner and outer tube bodies. The function of such shock absorbing materials is mainly to absorb and dissipate shocks generated by the operation of the engine, thereby avoiding that such shocks are transferred to other parts of the exhaust system, affecting the stability and operation efficiency of the entire exhaust system. The shock-absorbing material penetrates through the whole length between the inner and outer pipe bodies, so that the whole corrugated pipe body can effectively absorb shock.

In addition, the double-layer corrugated pipe body is designed into a multi-section structure and comprises a first corrugated section, a flat section and a second corrugated section. The two sides of the leveling section are respectively provided with a first corrugated section and a second corrugated section. The multi-stage design has a very important function, namely, the multi-stage design can provide more targeted damping effect according to different vibration frequencies and amplitudes generated by the engine under different working conditions. For example, in certain operating conditions of the engine, the engine may generate vibrations of greater amplitude or frequency, in which case a greater damping capacity is required to counter such vibrations. The multistage design can adjust the damping performance according to the working state of the engine, and ensure the stable operation of the engine and an exhaust system.

As for the connection relationship, the outer end of the double-layered bellows body is connected with the exhaust port and the muffler of the engine through a flange. The connection among the flattening section, the first corrugated section and the second corrugated section is usually realized by means of welding and the like, so that the integrity and the stability of the pipe body are ensured.

In particular, the flattened section plays a very critical role in such multi-segment bellows body designs. Its main effects and significance are mainly expressed in the following aspects:

structural stability: the flattened section may serve as a structurally stable portion, in contrast to the corrugated sections on both sides, providing a relatively stable structural reference. This can prevent that too much ripple from leading to the structure elasticity too big, has guaranteed the overall stability of body.

Damping effect adjusts: under certain engine operating conditions, the engine may produce vibrations of greater amplitude or frequency. At this time, the leveling section can act as a "buffer" to help reduce excessive shock transfer, preventing excessive shock from affecting the stable operation of the engine and exhaust system.

Thermal expansion adjustment: during engine operation, the pipe body is thermally expanded due to the high temperature exhaust gas. The flattened section can absorb the length change due to the temperature change to some extent, thereby avoiding excessive stress at the connection site due to thermal expansion.

Saving materials: less material is required in the manufacturing process of the flat section compared to the corrugated section, thereby saving material costs to some extent.

In summary, the design of the flat section can ensure the excellent shock absorption performance of the metal corrugated telescopic exhaust pipe, and simultaneously has better structural stability and thermal expansion adjustment performance, so that the design has more advantages in economic benefit.

The purpose of providing the corrugated section is mainly two: firstly, the elasticity of the exhaust pipe is enhanced, and secondly, the functions of shock absorption and noise reduction are provided.

First, the existence of the corrugated section enables the metal corrugated telescopic exhaust pipe to bear displacement and thermal expansion effects generated by engine operation to a certain extent. Since the engine has various vibration and displacement in the running process, the corrugated section can provide enough elasticity, and the exhaust pipe body cannot generate excessive stress when bearing the displacement and vibration, so that the cracking or fracture of the exhaust pipe is avoided.

Secondly, the bellows also play a key role in damping and noise reduction. Due to the operation of the engine, particularly at high speeds, a large amount of vibration and noise is generated. The corrugated section has good shock absorption performance, and can effectively absorb and disperse the vibration so as to reduce the influence of the corrugated section on other parts of the vehicle and drivers. In addition, the corrugated section can also effectively reduce noise generated by exhaust gas passing through the exhaust pipe, thereby improving the driving environment.

Therefore, the arrangement of the corrugated section plays an important role in improving the performance of the metal corrugated telescopic exhaust pipe and improving driving experience.

The flanges 2 are respectively disposed at two ends of the double-layered corrugated pipe body 1, and are made of a material having a certain elasticity, such as silica gel, rubber, etc., to absorb part of shock. The flange 2 is embedded with a steel ring, such as stainless steel, which is arranged at the peripheral part of the flange 2 to enhance the stability and strength of the flange 2. The flange 2 is provided with mounting holes 21 for connecting the double-layered bellows body 1 with an exhaust port and a muffler of an engine.

Specifically, the flange is a circular or other shaped coupling member designed with a plurality of mounting holes. These mounting holes enable the flange to securely connect the corrugated metal extension exhaust pipe with the exhaust port and muffler of the engine by bolts or other fasteners. In addition, the steel ring is embedded in the flange, so that the flange is of an annular structure and is distributed at the periphery of the flange, and the effect of reinforcing the flange is achieved.

Flanges are arranged at two ends of the double-layer corrugated pipe body and are contacted with an exhaust port and a silencer of the engine. In this position, the flange is able to effectively transmit the vibrations generated by the engine to the bellows body and then absorb the vibrations by the particular structure of the bellows body.

The flange is connected with an exhaust port of the engine and the muffler through mounting holes on the flange. The flange is typically fastened to the exhaust port and muffler of the engine by bolts or other fasteners to form a unitary body.

The main function of the flange is to connect the corrugated pipe body with the exhaust port and the silencer of the engine, and in the connecting process, the vibration generated by the engine is absorbed, so that the influence of the vibration on the exhaust system and other parts of the engine is prevented.

The main body of the flange is made of a material with certain elasticity, such as silica gel, rubber and the like, which can absorb part of vibration and reduce the influence of the vibration. Meanwhile, the steel ring embedded in the flange is made of stainless steel, and the material has high strength and good corrosion resistance, and can ensure the stability and strength of the flange.

The positioning structure 3 comprises a positioning ring 31 and a positioning clamping groove. The positioning ring 31 is arranged on the outer side of the joint of the outer pipe body and the flange 2, and can reduce the influence of vibration of the engine on the silencer. The positioning clamping groove is arranged on the side surface of the flange 2, and is semicircular in shape so as to be matched with the connecting bolts 4 with various shapes.

In this embodiment, location structure mainly includes holding ring and location draw-in groove, and they act on the fixed and the location of metal corrugated expansion exhaust pipe and engine gas vent and muffler jointly, help offset the vibration, prevent dislocation.

Specifically, the positioning ring is generally an annular structure and is arranged outside the joint of the corrugated pipe body and the flange; the positioning clamping groove is a semicircular groove and is arranged on the side face of the flange. The design of the positioning clamping groove can be adapted to connecting bolts with various shapes so as to adapt to different installation requirements.

The locating ring is positioned at the outer side of the joint of the outer layer pipe body and the flange, and can fix the corrugated pipe body and the flange structure together through the locating ring. The positioning clamping groove is positioned on the side face of the flange to adapt to connecting bolts with various shapes, and the position of the exhaust pipe is further fixed.

The positioning ring is directly connected with the flange, and the positioning clamping groove is fixed with the connecting part of the engine and the silencer by inserting the connecting bolt.

The main functions of the positioning structure are stability and positioning, the influence of vibration of the engine during operation on the muffler and the exhaust pipe can be effectively reduced, loosening or dislocation of a connecting part caused by vibration is avoided, and stable operation of an exhaust system is ensured.

The positioning ring and the positioning clamping groove can be made of materials such as metal or high-strength plastic, and the materials have good wear resistance, corrosion resistance and enough hardness, and can keep stability and durability under the high-temperature and high-pressure environment.

Through connecting bolt 4 for location structure 3 is fixed with the junction of engine and muffler, has guaranteed the flexible blast pipe system of whole metal ripple in the in-process of engine work, remains stable connected state throughout.

Application example: the metal corrugated telescopic exhaust pipe is adopted on a diesel engine of a large commercial truck. The main component of the exhaust pipe is stainless steel with high temperature resistance, excellent mechanical property and excellent corrosion resistance.

Specifically, the double-layer corrugated tube body 1, including the first corrugated section 11, the flat section 12, and the second corrugated section 13, is made of stainless steel. Silica gel is filled between the inner and outer tube bodies of the double-layer corrugated tube body to be used as a damping material so as to optimize the shock absorption capacity. This design allows vibrations and thermal expansions generated during engine operation to be effectively absorbed and dampened, thereby protecting the engine and other parts of the vehicle.

The flange 2 is also made of stainless steel, and a steel ring is embedded in the flange to enhance the stability and strength of the flange. The flange connects the double-layer corrugated pipe body with the exhaust port and the muffler of the engine through the mounting holes 21.

The positioning structure 3, including the positioning ring 31 and the positioning clamping groove, is made of stainless steel. The locating ring is arranged on the outer side of the joint of the outer pipe body and the flange, so that the influence of vibration of the engine on the silencer can be reduced. The positioning clamping groove is arranged on the side face of the flange and is semicircular in shape so as to be matched with connecting bolts in various shapes. And the connecting bolt 4 is used for fixing the exhaust pipe at the connecting part of the engine and the silencer.

The commercial truck adopting the metal corrugated telescopic exhaust pipe can ensure the efficient operation of the engine no matter the commercial truck runs on an expressway or shuttles on an urban road, and meanwhile, the vibration and noise are effectively reduced, and the driving comfort level of a driver is improved.

The foregoing is only illustrative of the present utility model and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present utility model.

Claims

1. The metal corrugated telescopic exhaust pipe is characterized by comprising a double-layer corrugated pipe body, a flange and a positioning structure, wherein the double-layer corrugated pipe body is composed of an inner pipe body and an outer pipe body, a damping material is filled between the inner pipe body and the outer pipe body, and the inner pipe body and the outer pipe body are made of corrugated high-temperature-resistant and corrosion-resistant metal materials; the flanges are respectively arranged at two ends of the double-layer corrugated pipe body, are made of materials with certain elasticity, are embedded with steel rings to provide strength, and are used for connecting the double-layer corrugated pipe body with an exhaust port and a silencer of the engine; the positioning structure comprises a positioning ring and a positioning clamping groove, the positioning ring is arranged at the joint of the corrugated pipe body and the flange, the positioning clamping groove is arranged on the side face of the flange, a connecting bolt is inserted into the positioning clamping groove, and the connecting part of the positioning clamping groove, the engine and the silencer is fixed through the connecting bolt.

2. The metal corrugated telescopic exhaust pipe according to claim 1, wherein the double-layer corrugated pipe body is of a multi-section structure and comprises a first corrugated section, a leveling section and a second corrugated section, the first corrugated section and the second corrugated section are respectively arranged on two sides of the leveling section, and outer end connecting flanges of the first corrugated section and the second corrugated section are respectively arranged on two sides of the leveling section.

3. The corrugated metal pipe as claimed in claim 1, wherein the embedded steel ring is made of stainless steel and is arranged at the peripheral part of the flange to enhance the stability and strength of the flange.

4. The corrugated metal pipe as claimed in claim 1, wherein the positioning ring is fixed on the outer side of the junction of the outer pipe body and the flange, and the positioning slot is semicircular in shape to adapt to various shapes of connecting bolts.

5. The corrugated metal pipe as claimed in claim 1, wherein the shock absorbing material fills the entire length between the inner pipe body and the outer pipe body; the shock absorbing material is made of silica gel to optimize shock absorbing capacity.

6. The corrugated metal pipe of claim 1, wherein the flange is provided with mounting holes.