High-rigidity metal flexible compensator

Abstract

The utility model discloses a high-rigidity metal flexible compensator which comprises a compensator body composed of two corrugated pipe parts and a supporting pipe part, the supporting pipe part is of a round pipe structure integrally formed with the two corrugated pipe parts, and the supporting pipe part plays a role in supporting and connecting the two corrugated pipe parts. The corrugated pipe part is arranged on the compensator main body, so that the overall rigidity of the compensator main body is improved, the height of the wave crest protrusions of the corrugated pipe part is 15-20 mm and is higher than the height of the wave crest of a traditional corrugated pipe, the corrugated pipe part has better flexibility and displacement compensation effect, and the reinforcing rib structure is arranged on the side wall of each wave crest protrusion, so that the overall rigidity of the compensator main body is improved. According to the metal flexible compensator adopting the technical scheme, more displacement compensation amount can be obtained, the structural rigidity and the deformation and stretching resistance of the metal flexible compensator can be improved, and therefore the load bearing capacity of a product is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metal bellows, in particular to a high-rigidity metal flexible compensator. Background Art

[0002] A flexible compensator is a flexible structure made of metal bellows, which is used to compensate for the angular and axial displacement of pipelines, ducts, and containers. This flexible bellows can be used as a connecting component of the automobile exhaust system. It is generally installed at the front of the exhaust system, very close to the automobile engine, in a high temperature and vibration environment. The main metal bellows is used to compensate for the axial displacement of the automobile exhaust pipe caused by thermal expansion and contraction during use, and to reduce the possibility of exhaust pipe breakage caused by the bumps of the car on the road.

[0003] According to the multiple wave crests and troughs of the metal bellows, which are arranged radially around the bellows, and the multiple wave crests and troughs are arranged in order along the axial interval of the bellows, the wave crest height of the bellows used in the automobile exhaust system is generally 10mm. Due to the use of this structure, when the length of the metal bellows is made longer, although it has better flexibility and can obtain a larger angular and axial compensation, the overall stiffness of the metal bellows is not high, and it cannot withstand a large load pressure, which reduces the ability to resist deformation and stretching. During installation and use, the metal bellows is prone to deformation, bending, or even rupture when subjected to a large pressure, affecting the service life of the product. Therefore, under the premise of meeting the compensation amount of the metal bellows, it is necessary to further improve the structural stiffness of the bellows. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the metal bellows in the prior art has low overall rigidity and poor ability to resist deformation and stretching, which leads to the metal bellows being easily deformed, bent or even broken when subjected to greater pressure.

[0005] In order to solve the above technical problems, the utility model provides a high-rigidity metal flexible compensator, including a compensator body, wherein the compensator body is composed of two bellows parts and a support tube part connected between the two bellows parts, the support tube part is a circular tube structure integrally formed with the two bellows parts, the bellows part includes a plurality of annular wave crest protrusions arranged at intervals along its axial direction, the height of the wave crest protrusion is 15mm-20mm, and a reinforcing rib structure is arranged on one side or both sides of the side wall of each of the wave crest protrusions.

[0006] As a preferred solution, the reinforcing rib structure is at least one annular rib formed on the side walls of the wave crest protrusion.

[0007] As a preferred solution, the annular rib is integrally stamped and formed on the side walls on both sides of the wave crest protrusion, and two annular grooves are formed on the inner walls on both sides of the wave crest protrusion corresponding to the annular rib.

[0008] As a preferred solution, the reinforcing rib structure is composed of a plurality of convex ribs in an annular array on the side walls of both sides of the wave crest protrusion.

[0009] As a preferred solution, two buffer tube portions are extended and connected between the two ends of the support tube portion and the two corrugated tube portions.

[0010] As a preferred solution, the cross-section of the buffer tube portion is in a bell-mouth shape.

[0011] As a preferred solution, the support tube portion and the two corrugated tube portions are hydraulically formed integrally from a stainless steel tube blank, and the length of the support tube portion is 1 / 4-1 / 3 of the length of the compensator body.

[0012] As a preferred solution, the tube diameter H of the support tube portion is larger than the inner diameter D1 of the bellows portion and smaller than the outer diameter D2 of the bellows portion.

[0013] As a preferred solution, one end of the two corrugated tube parts away from the supporting tube part is respectively formed with a circular connecting pipe, and a flange structure is installed on the circular connecting pipe.

[0014] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0015] 1. In the high-rigidity metal flexible compensator provided by the utility model, the compensator body is composed of two bellows parts and a supporting tube part, and the supporting tube part is a round tube structure integrally formed with the two bellows parts. The supporting tube part supports and connects the two bellows parts, thereby improving the overall rigidity of the compensator body, and the compensator body can be made longer without deformation and bending. At the same time, the wave crest protrusion height of the bellows part is made to 15mm-20mm, which is higher than the wave crest height of the traditional bellows, so that the bellows part has better flexibility and displacement compensation effect, and a reinforcing rib structure is provided on the side wall of each wave crest protrusion. The reinforcing rib structure can increase the structural strength of the bellows part, avoid bending and deformation of the bellows part caused by uneven stress caused by the increased height, and have good structural stability. The metal flexible compensator adopting the technical solution can not only obtain more displacement compensation, but also improve its own structural rigidity and ability to resist deformation and stretching, thereby improving the load bearing capacity and service life of the product.

[0016] 2. In the high-rigidity metal flexible compensator provided by the utility model, since the peak height of the bellows part is made higher, a better displacement compensation amount can be obtained. In order to prevent the bellows part from plastic deformation or even rupture during use, a reinforcing rib structure is provided on each peak protrusion. The reinforcing rib structure is preferably annular ribs respectively formed on the side walls on both sides of the peak protrusion. Such annular ribs are distributed according to the annular contour shape of the peak protrusion, which greatly enhances the structural strength of multiple peak protrusions, thereby overcoming the plastic deformation or even rupture of the bellows part caused by uneven stress caused by excessive peak height, thereby improving the strength and deformation resistance of the bellows part.

[0017] 3. In the high-rigidity metal flexible compensator provided by the utility model, two buffer tube portions are extended and connected between the two ends of the support tube portion and the two bellows tube portions, and the cross-sectional shape of the buffer tube portion is a trumpet-mouth shape. This structural arrangement, with the help of the two buffer tube portions designed in a trumpet-mouth shape, effectively expands the diameter between the support tube portion and the bellows tube portion, plays a role in force buffering and gas diversion, and prevents the metal flexible compensator from rapid expansion during the exhaust process and promotes gas fluidity, thereby more effectively protecting the bellows and the support tube portion and improving the smoothness of the exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the cross-sectional structure of a high-rigidity metal flexible compensator provided by the utility model;

[0020] Figure 2 for Figure 1 The schematic diagram of the partially enlarged structure of the high-rigidity metal flexible compensator shown;

[0021] Figure 3 It is a schematic diagram of the planar structure of the reinforcing rib structure of the utility model;

[0022] Figure 4 It is a schematic diagram of a planar structure of another alternative method of the reinforcing rib structure of the utility model;

[0023] Explanation of the reference numerals: 1. bellows portion; 11. wave crest protrusion; 2. support pipe portion; 3. buffer pipe portion; 4. circular connecting pipe; 5. reinforcing rib structure; 51. annular convex rib; 52. convex rib strip. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components.

[0027] Example

[0028] The present embodiment is described in detail below with reference to the accompanying drawings:

[0029] This embodiment provides Figure 1-4 A high-rigidity metal flexible compensator is shown, comprising a compensator body, which is composed of two bellows parts 1 and a support tube part 2 connected between the two bellows parts 1, wherein the support tube part 2 is a circular tube structure integrally formed with the two bellows parts 1, and the bellows part 1 comprises a plurality of annular wave crest protrusions 11 arranged at intervals along its axial direction, wherein the height of the wave crest protrusion 11 is 15 mm-20 mm, and a reinforcing rib structure 5 is arranged on one side or both side walls of each of the wave crest protrusions 11.

[0030] The above implementation mode is the core technical solution of this embodiment. The compensator body is composed of two bellows parts 1 and a support tube part 2. The support tube part 2 supports and connects the two bellows parts 1, thereby improving the overall stiffness of the compensator body. The compensator body can be made longer without deformation or bending. The height of the wave crest protrusion 11 of the bellows part 1 is made to 15mm-20mm, which is higher than the wave crest height of the traditional bellows, so that the bellows part 1 has better flexibility and displacement compensation effect. A reinforcing rib structure 5 is provided on the side wall of each wave crest protrusion 11. The reinforcing rib structure 5 can increase the structural strength of the bellows part, avoid bending and deformation of the bellows part 1 due to uneven stress caused by the increased height, and have good structural stability. The metal flexible compensator using this technical solution can not only obtain more displacement compensation, but also improve its own structural stiffness and ability to resist deformation and stretching, thereby improving the load bearing capacity and service life of the product.

[0031] Combine the following Figure 2-4 The specific setting method of the reinforcing rib structure is described in detail:

[0032] The height of the peak protrusion on the peak tube portion is preferably 16 mm. Since a higher peak height of the corrugated tube portion 1 can obtain a better displacement compensation amount, in order to prevent the corrugated tube portion 1 from plastic deformation or even rupture during use, a reinforcing rib structure 5 is provided on each peak protrusion 11. Figure 2-3 The reinforcing rib structure 5 is an annular convex rib 51 formed on the side walls of the wave crest protrusion 11, and the annular convex rib 51 is integrally stamped on the side walls of the wave crest protrusion 11, and two annular grooves are formed on the inner walls on both sides of the wave crest protrusion 11 corresponding to the annular convex rib 51. The advantage of this design is that the annular convex rib 51 is distributed according to the annular contour shape of the wave crest protrusion, which greatly enhances the structural strength of multiple wave crest protrusions 11, thereby overcoming the plastic deformation or even rupture of the corrugated tube part caused by the uneven stress caused by the excessive wave crest height, thereby improving the strength and deformation resistance of the corrugated tube part.

[0033] As an alternative to the above-mentioned reinforcing rib structure 5, refer to Figure 4 The reinforcing rib structure 5 is composed of a plurality of convex ribs 52 in an annular array on the side walls of the wave crest protrusion 11. Similarly, the structural strength of the plurality of wave crest protrusions 11 can be enhanced by the plurality of convex ribs 52, thereby overcoming the plastic deformation or even rupture of the bellows portion 1 caused by the uneven stress due to the excessive wave crest height, thereby improving the strength and anti-deformation ability of the bellows portion 1. Those skilled in the art can select the specific setting method of the reinforcing rib structure according to the above description, and other equivalent implementations will not be described one by one here.

[0034] In this embodiment, the support pipe part 2 and the two bellows parts 1 are hydraulically formed from a stainless steel tube blank. The length of the support pipe part 2 is 1 / 4-1 / 3 of the length of the compensator body. Figure 1 The diameter of the support pipe portion 2 is larger than the inner diameter D1 of the bellows portion 1 and smaller than the outer diameter D2 of the bellows portion 1. The support pipe portion 2 supports and connects the two bellows portions 1. In this way, the length of each bellows portion 1 can be made longer, thereby improving the overall compensation capacity of the compensator body. The support pipe portion 2 with a circular pipe structure design can avoid elastic fatigue, and has a strong overall load resistance, and can resist overall or local instability, thereby ensuring the structural stability of the compensator body.

[0035] It is further preferred that two buffer tubes 3 are extended and connected between the two ends of the support tube 2 and the two bellows 1, and the cross-sectional shape of the buffer tube 3 is in a trumpet shape. This structural setting effectively expands the diameter between the support tube 2 and the bellows 1 through the two buffer tubes 3 designed in a trumpet shape, plays a role in force buffering and gas diversion, and prevents the metal flexible compensator from rapid expansion during the exhaust process and promotes gas fluidity, thereby more effectively protecting the bellows and support tubes and improving the smoothness of product exhaust.

[0036] like Figure 1 As shown, the two bellows parts 1 are respectively formed with a circular connecting pipe 4 at one end away from the supporting pipe part 2, and a flange structure is installed on the circular connecting pipe 4. The metal flexible compensator can be installed to a preset installation position through the flange structure to achieve the installation and fixation of the metal flexible compensator.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A high-rigidity metal flexible compensator, comprising a compensator body, characterized in that: The compensator body is composed of two bellows parts (1) and a support pipe part (2) connected between the two bellows parts (1); the support pipe part (2) is a circular pipe structure integrally formed with the two bellows parts (1); the bellows part (1) comprises a plurality of annular wave crest protrusions (11) arranged at intervals along its axial direction; the height of the wave crest protrusions (11) is 15 mm to 20 mm; and a reinforcing rib structure (5) is provided on one side or both side walls of each of the wave crest protrusions (11).

2. A high-rigidity metal flexible compensator according to claim 1, characterized in that: The reinforcing rib structure (5) is at least one annular convex rib (51) formed on the side walls on both sides of the wave crest protrusion (11).

3. A high-rigidity metal flexible compensator according to claim 2, characterized in that: The annular convex rib (51) is integrally stamped and formed on the side walls on both sides of the wave crest protrusion (11), and two annular grooves are formed on the inner walls on both sides of the wave crest protrusion (11) corresponding to the annular convex rib (51).

4. A high-rigidity metal flexible compensator according to claim 1, characterized in that: The reinforcing rib structure (5) is composed of a plurality of convex ribs (52) arranged in an annular array on the side walls of both sides of the wave crest protrusion (11).

5. A high-rigidity metal flexible compensator according to claim 2 or 4, characterized in that: Two buffer tube sections (3) are extended and connected between the two ends of the support tube section (2) and the two corrugated tube sections (1).

6. A high-rigidity metal flexible compensator according to claim 5, characterized in that: The cross-sectional shape of the buffer tube portion (3) is a bell-mouth shape.

7. A high-rigidity metal flexible compensator according to claim 1, characterized in that: The support pipe part (2) and the two corrugated pipe parts (1) are integrally hydraulically formed from a stainless steel pipe blank, and the length of the support pipe part (2) is 1 / 4-1 / 3 of the length of the compensator body.

8. A high-rigidity metal flexible compensator according to claim 7, characterized in that: The diameter of the support tube portion (2) is larger than the inner diameter D1 of the bellows portion (1) and smaller than the outer diameter D2 of the bellows portion (1).

9. A high-rigidity metal flexible compensator according to claim 8, characterized in that: A circular connecting pipe (4) is formed at one end of the two corrugated pipe parts (1) away from the supporting pipe part (2), and a flange structure is installed on the circular connecting pipe (4).

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