CN212960351U - Corrugated pipe structure and exhaust system using same - Google Patents

Abstract

The utility model belongs to the technical field of metal pipe fitting, a bellows structure is related to, including bellows body, last connecting pipe and the lower connecting pipe of setting both ends about the bellows body, evenly distributed has a plurality of flexure strips on the outer circumference of last connecting pipe, the flexure strip includes interconnect's vertical and arc, the lateral wall fixed connection of vertical and last connecting pipe, the arc outwards extends along the lower extreme of vertical, be equipped with elasticity adjustable's clamp on the outer then circumference of lower connecting pipe, bellows body and last connecting pipe and lower connecting pipe between be integrated into one piece's flexible metal bellows structure, the flexure strip is the integrated into one piece structure of vertical and arc, and the upper and lower both ends of directional bellows body respectively at the both ends of flexure strip. The utility model discloses simple structure, reliable and stable, both convenient effective, reduce cost has realized the damping and has fallen the function of making an uproar again, has very big market value, is worth extensively popularizing and applying.

Description

Corrugated pipe structure and exhaust system using same

Technical Field

The utility model belongs to the technical field of the metal pipe fitting, concretely relates to bellows structure and use this bellows structure's exhaust system.

Background

The engineering machinery has severe working condition and large vibration impact, and the exhaust system not only bears severe vibration during working, but also has the phenomenon that the parts of the exhaust system are cracked and fall off in early stage when the exhaust system needs to treat the emission of high-temperature exhaust gas of an engine.

In the exhaust system of engineering machinery, often use flexible metal bellows, its main effect is the energy that the absorption vibration produced, realizes the flexonics, bears the high temperature of exhaust, uses flexible metal bellows in the present trade, uses the clamp to press from both sides tight fixed, and both ends are fixed and can lead to the bellows atress inequality, can't release stress under the high temperature, lead to the fracture inefficacy, if flexible metal bellows fixed mode is unreasonable promptly, or the distortion is too big, under the effect of thermal stress, just can lead to premature failure fracture.

Therefore, a flexible metal corrugated pipe structure with elastic buffering and vibration damping performance is needed to be designed to solve the problem of cracking caused by uneven stress during the operation of the flexible metal corrugated pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that flexible metal bellows leads to the fracture at the inequality stress of work among the prior art, a simple structure of design, reliable and stable, both convenient effective, reduce cost's bellows structure and use this bellows structure's exhaust system again.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a bellows structure, includes bellows body, sets up last connecting pipe and lower connecting pipe at bellows body upper and lower both ends, evenly distributed has a plurality of flexure strips on the outer circumference of last connecting pipe, the flexure strip includes interconnect's vertical and arc, the lateral wall fixed connection of vertical and last connecting pipe, the arc outwards extends along the lower extreme of vertical, be equipped with elasticity adjustable clamp on the outside circumference of connecting pipe down.

Preferably, the corrugated pipe body, the upper connecting pipe and the lower connecting pipe are in an integrally formed flexible metal corrugated pipe structure.

Preferably, the elastic sheet is an integrally formed structure of a vertical part and an arc-shaped part, and two ends of the elastic sheet point to the upper end and the lower end of the corrugated pipe body respectively.

Preferably, the number of the elastic pieces is three, and the three elastic pieces are distributed at equal angular intervals.

Preferably, the vertical member is fixedly connected with the upper connecting pipe through a rivet.

Preferably, the arc-shaped part is in a parabolic structural form with the middle protruding out of two ends.

An exhaust system, comprising:

the above-described bellows structure;

an engine aftertreatment assembly mounted on the bracket;

the exhaust pipe is arranged above the engine post-treatment assembly, and the corrugated pipe structure is connected between the exhaust pipe and the engine post-treatment assembly.

Preferably, the lower connecting pipe is clamped on an exhaust port of the engine after-treatment assembly through a clamping hoop.

Preferably, the upper connecting pipe is pressed on the inner side wall of the exhaust pipe through an elastic sheet.

After the technical scheme is adopted, the utility model provides a pair of bellows structure and use exhaust system of this bellows structure has following beneficial effect:

(1) the two ends of the flexible metal corrugated pipe are respectively connected and fixed by adopting one end, the other end is free, the free end is elastically connected, so that the flexible metal corrugated pipe can absorb vibration energy and has the functions of vibration reduction and noise reduction;

(2) the utility model has simple structure, stability and reliability, not only realizes elastic connection, but also can effectively release thermal stress, and prolongs the service life of the metal flexible corrugated pipe;

(3) the utility model discloses it is all very convenient that structural mounting disassembles, does not need to use special instrument, has reduced the cost input of installation and maintenance.

Drawings

Fig. 1 is a schematic structural view of a bellows structure according to the present invention;

fig. 2 is a schematic view of an assembly structure of an exhaust system adopting the bellows structure of the present invention.

Wherein: bellows body 1, last connecting pipe 2, lower connecting pipe 3, flexure strip 4, vertical 5, arc 6, clamp 7, rivet 8, engine aftertreatment assembly 9, support 10, blast pipe 11, gas vent 12.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The utility model relates to a corrugated pipe structure, as shown in figure 1, comprising a corrugated pipe body 1, an upper connecting pipe 2 and a lower connecting pipe 3 which are arranged at the upper end and the lower end of the corrugated pipe body 1, in particular to a flexible metal corrugated pipe structure which is integrated between the corrugated pipe body 1 and the upper connecting pipe 2 as well as the lower connecting pipe 3, a plurality of elastic sheets 4 are uniformly distributed on the outer circumference of the upper connecting pipe 2, in particular, the two ends of the elastic sheets 4 are respectively directed to the upper end and the lower end of the corrugated pipe body 1, three elastic sheets 4 are arranged, and the three elastic sheets 4 are distributed along the outer circumference of the upper connecting pipe 2 at equal angular intervals, the elastic sheets 4 comprise a vertical piece 5 and an arc piece 6 which are connected with each other, the vertical piece 5 and the arc piece 6 are integrated, the vertical piece 5 is fixedly connected with the outer side wall of the upper connecting pipe 2, in particular, the vertical piece 5 is fixedly connected with the, the arc 6 is outwards extended along the lower end of the vertical part 5, specifically, the arc 6 is in a parabolic structure shape protruding out of the two ends in the middle, and a clamp 7 with adjustable tightness is arranged on the circumference of the outer side of the lower connecting pipe 3.

The utility model relates to an exhaust system, as shown in fig. 2, including above-mentioned bellows structure, engine aftertreatment assembly 9 and blast pipe 11, engine aftertreatment assembly 9 is installed on support 10, blast pipe 11 sets up the top at engine aftertreatment assembly 9, bellows structural connection is between blast pipe 11 and engine aftertreatment assembly 9, and is concrete, connecting pipe 3 presss from both sides tightly on the gas vent 12 of engine aftertreatment assembly 9 through clamp 7 down, and the internal diameter of connecting pipe 3 is not less than the external diameter of gas vent 12 promptly down, it compresses tightly on the inside wall of blast pipe 11 through flexure strip 4 to go up connecting pipe 2, and the external diameter of going up connecting pipe 2 promptly is not more than the internal diameter of blast pipe 11.

The utility model relates to a bellows structure for exhaust system, during the installation, lower connecting pipe 3 presss from both sides tightly on the gas vent 12 of engine aftertreatment assembly 9 with clamp 7, go up connecting pipe 2 and directly inlay and insert blast pipe 11, at this moment, the riveting is in metal flexure strip 4 in the last connecting pipe 2 outside under elastic effect, compress tightly on the inner wall of blast pipe 11, six degrees of freedom are all unrestricted, so, above-mentioned bellows installation has realized that one end is fixed, the elastic free connection of one end.

To sum up, the utility model provides a pair of bellows structure and use exhaust system of this bellows structure, simple structure, reliable and stable, both convenient effective, reduce cost has realized the damping and has fallen the function of making an uproar again, has very big market value, is worth extensively popularizing and applying.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. A bellows structure, characterized by: including bellows body (1), last connecting pipe (2) and lower connecting pipe (3) of setting both ends about bellows body (1), evenly distributed has a plurality of flexure strips (4) on the outer circumference of last connecting pipe (2), flexure strip (4) are including interconnect's vertical (5) and arc (6), the lateral wall fixed connection of vertical (5) and last connecting pipe (2), the lower extreme of vertical (5) is outwards extended in arc (6), be equipped with elasticity adjustable clamp (7) on the outside circumference of connecting pipe (3) down.

2. A bellows structure according to claim 1, wherein: the corrugated pipe body (1), the upper connecting pipe (2) and the lower connecting pipe (3) are integrally formed to form a flexible metal corrugated pipe structure.

3. A bellows structure according to claim 1, wherein: the elastic sheet (4) is of an integrally formed structure of a vertical part (5) and an arc-shaped part (6), and two ends of the elastic sheet (4) point to the upper end and the lower end of the corrugated pipe body (1) respectively.

4. A bellows structure according to claim 1, wherein: the number of the elastic pieces (4) is three, and the three elastic pieces (4) are distributed at equal angle intervals.

5. A bellows structure according to claim 1, wherein: the vertical piece (5) is fixedly connected with the upper connecting pipe (2) through a rivet (8).

6. A bellows structure according to claim 5, wherein: the arc-shaped piece (6) is in a parabolic structure shape with the middle protruding out of two ends.

7. An exhaust system, characterized by: the method comprises the following steps:

a bellows structure as claimed in any one of claims 1 to 6;

an engine aftertreatment assembly (9), the engine aftertreatment assembly (9) being mounted on a bracket (10);

the exhaust pipe (11), the exhaust pipe (11) sets up the top at engine aftertreatment assembly (9), the bellows structure is connected between exhaust pipe (11) and engine aftertreatment assembly (9).

8. An exhaust system according to claim 7, wherein: the lower connecting pipe (3) is clamped on an exhaust port (12) of an engine post-treatment assembly (9) through a clamp (7).

9. An exhaust system according to claim 7, wherein: the upper connecting pipe (2) is tightly pressed on the inner side wall of the exhaust pipe (11) through the elastic sheet (4).

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