Pre-adjustable corrugated pipe with variable cross-section shape

Abstract

The invention belongs to the technical field of corrugated pipes, and discloses a pre-adjustable corrugated pipe with a variable cross-section shape, the pre-adjustable corrugated pipe comprises a pre-adjustable corrugated pipe and a U-shaped corrugated pipe, the pre-adjustable corrugated pipe comprises a first arc, and two ends of the first arc are fixedly connected with first circular rings; through cooperation of structures such as the first circular arc and the first circular ring, the defects that a U-shaped corrugated pipe is small in single-wave compression ratio and large in axial rigidity are overcome, the waveform of the pre-adjustable corrugated pipe can be manually designed in advance, the application range of many corrugated pipes can be widened, and the application range of the corrugated pipe is widened. According to the utility model, the design is reasonable, a selectable space is provided for application in the aspect of displacement ratio of external pressure, and different pressure, displacement and rigidity requirements are met by reasonably selecting and adjusting different geometric corrugated pipe parameters (except for the same parameters as the U shape, the radius r1 of the first circular arc, the height h1 of the first circular ring and the like).

Description

Technical Field

[0001] The invention belongs to the technical field of corrugated pipes, in particular to a corrugated pipe with a pre-adjustable variable cross-section shape. Background Art

[0002] Bellows, as an important mechanical component, plays an indispensable role in many fields with its unique structure and excellent performance. Its history can be traced back to the 19th century, but it was not until the mid-20th century that it was widely used with the rapid development of industrial technology. The core of bellows lies in its elastic corrugated structure. This design gives the material compressibility and extensibility in the axial and radial directions, enabling it to cope with various complex working conditions. Therefore, it is widely used in aerospace, automobile manufacturing, petrochemical, medical equipment and other fields, and is mainly used for precision bellows required by various industries such as vacuum, valves and sensors.

[0003] The waveform of the existing hydraulic metal bellows is mostly "U" shaped, however, the compression ratio (displacement / free length) that this type of bellows can withstand under the specified life requirements is relatively small, and under the conditions of the outer dimensions and wall thickness of the bellows, its pressure bearing capacity and displacement capacity under the same life conditions are both fixed values, which makes the application occasions and uses of the "U" shape subject to greater restrictions. Therefore, a pre-adjustable variable cross-section bellows is proposed, which has the effect of improving the pressure resistance of the bellows, improving the pressure resistance of the bellows and increasing the application range of the bellows. Summary of the invention

[0004] In order to solve the problem mentioned in the above background technology that the waveform of the existing hydraulic metal bellows is mostly "U"-shaped, but the compression ratio (displacement / free length) that this type of bellows can withstand under the specified life requirement is relatively small, and when the bellows's outer dimensions and wall thickness are conditions, its pressure bearing capacity and displacement capacity under equal life conditions are both fixed values, which makes the application occasions and uses of the U-shape subject to greater restrictions, the present invention provides a bellows with a pre-adjustable variable cross-section shape.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pre-adjustable variable-cross-section bellows, comprising a pre-adjustable bellows and a "U"-shaped bellows, the pre-adjustable bellows comprising a first arc, both ends of the first arc are fixedly connected to a first ring, the two ends of the first rings away from the first arc are fixedly connected to a second arc, and the two ends of the second arcs away from the first ring are fixedly connected to a second ring.

[0006] Preferably, there are several pre-adjustable bellows, the distance between two of the second rings is q, the distance between the centers of two of the first arcs is q, the radius of the first arc is r1, the radius of the second arc is r2, the height of the pre-adjustable bellows is h, the height of the first ring is h1, and the height of the second ring is h2.

[0007] Preferably, the width of the "U"-shaped corrugated tube is q, and the height of the "U"-shaped corrugated tube is h.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention solves the shortcomings of the "U"-shaped bellows, such as relatively small single-wave compression and large axial stiffness, by arranging the coordination of structures such as the first arc and the first ring. The waveform of the pre-adjustable bellows can be artificially designed in advance, which can improve the application range of many bellows, especially providing a selection space for applications in displacement ratios with extremely large external pressures. At the same time, by reasonably selecting and adjusting different geometric bellows parameters (in addition to the same parameters as the U-shape, the radius r1 of the first arc and the height h1 of the first ring are added), the pressure, displacement and stiffness requirements of different requirements can be met, and the bellows can be used to replace the "U"-shaped bellows in applications under external pressure and in specific occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention;

[0011] Figure 2 This is a schematic diagram of the front view structure of the pre-adjustable bellows of the present invention;

[0012] Figure 3 It is a front view structural schematic diagram of the "U"-shaped corrugated pipe of the present invention.

[0013] In the figure: 1. pre-adjustable bellows; 11. first arc; 12. first ring; 13. second arc; 14. second ring; 2. "U"-shaped bellows. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] like Figures 1 to 3As shown, the present invention provides a pre-adjustable variable-section bellows, including a pre-adjustable bellows 1 and a "U"-shaped bellows 2, the pre-adjustable bellows 1 includes a first arc 11, both ends of the first arc 11 are fixedly connected with a first ring 12, the ends of the two first rings 12 away from the first arc 11 are fixedly connected with a second arc 13, and the ends of the two second arcs 13 away from the first ring 12 are fixedly connected with a second ring 14.

[0016] There are several pre-adjustable bellows 1, the distance between the two second circular rings 14 is q, the distance between the centers of the two first circular arcs 11 is q, the radius of the first circular arc 11 is r1, the radius of the second circular arc 13 is r2, the height of the pre-adjustable bellows 1 is h, the height of the first circular ring 12 is h1, the height of the second circular ring 14 is h2, the width of the "U"-shaped bellows 2 is q, and the height of the "U"-shaped bellows 2 is h.

[0017] The above scheme is adopted: by setting the cooperation of the first arc 11 and the first ring 12 and other structures, the shortcomings of the "U"-shaped bellows 2, such as relatively small single-wave compression and large axial stiffness, are solved. The waveform of the pre-adjustable bellows 1 can be artificially designed in advance, such as being composed of spherical shells of two or more different arcs (such as the first arc 11 and the second arc 13, etc.) and rings of different heights (such as the first ring 12 and the second ring 14, etc.). Different design changes of these data can achieve that the waveform is compared with the waveform of the "U"-shaped bellows 2, and not only the ring shell can be The bellows is strengthened and the radius of the arc spherical shell is also reduced to achieve the purpose of improving the pressure resistance of the bellows and increasing the compression ratio of a single wave, thereby improving the application range of many bellows, especially providing a selection space for applications in displacement ratios with extremely large external pressures. At the same time, by reasonably selecting and adjusting different geometric bellows parameters (in addition to the same parameters as the U-shape, the radius r1 of the first arc 11 and the height h1 of the first ring 12 are added), the pressure, displacement and stiffness requirements of different requirements can be met, and the bellows can be used to replace the "U"-shaped bellows 2 in applications under external pressure and in specific occasions.

[0018] The working principle and use process of the present invention: The waveform of the bellows 1 can be pre-adjusted as follows: Figure 2 As shown, it is composed of spherical shells of two or more different arcs (such as the first arc 11 and the second arc 13, etc.) and circular rings of different heights (such as the first circular ring 12 and the second circular ring 14, etc.), and different design changes of these data can be used to achieve that the waveform is not only strengthened compared with the waveform of the "U"-shaped bellows 2, but also the radius of the arc spherical shell is reduced, so as to achieve the purpose of improving the pressure resistance of the bellows and increasing the compression ratio of a single wave;

[0019] And because a variety of composite bellows are used, U-shapes formed by arcs and rings of different widths are flexibly compounded and superimposed according to a certain rule, thereby greatly improving the pressure resistance, displacement per unit length and overall axial stiffness of the bellows, so that the device can be used to replace the "U"-shaped bellows 2 in applications of external pressure and specific occasions.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-adjustable variable cross-sectional shape bellows, comprising a pre-adjustable bellows (1) and a "U"-shaped bellows (2), characterized in that: The pre-adjustable bellows (1) comprises a first circular arc (11), both ends of the first circular arc (11) are fixedly connected to a first circular ring (12), two ends of the first circular rings (12) away from the first circular arc (11) are fixedly connected to a second circular arc (13), and two ends of the second circular arcs (13) away from the first circular ring (12) are fixedly connected to a second circular ring (14).

2. The pre-adjustable variable cross-sectional shape bellows according to claim 1, characterized in that: There are a plurality of pre-adjustable bellows (1), the distance between two of the second circular rings (14) is q, the distance between the centers of two of the first circular arcs (11) is q, the radius of the first circular arc (11) is r1, the radius of the second circular arc (13) is r2, the height of the pre-adjustable bellows (1) is h, the height of the first circular ring (12) is h1, and the height of the second circular ring (14) is h2.

3. The pre-adjustable variable cross-sectional shape bellows according to claim 1, characterized in that: The width of the "U"-shaped corrugated tube (2) is q, and the height of the "U"-shaped corrugated tube (2) is h.

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