bellows

Abstract

This invention discloses a bellows, comprising: a bellows body, the bellows body including multiple tangential displacement portions and multiple compensation portions, the tangential displacement portions and compensation portions being arranged sequentially and connected along a first direction, with every two tangential displacement portions connected or spaced apart by at least one compensation portion; each tangential displacement portion includes two displacement structures connected and symmetrically arranged along the first direction, and the two displacement structures are subjected to different force directions; the compensation portions are expandable and deformable along the first direction, and the maximum deformation of the multiple compensation portions in the first direction is not less than the maximum deformation of the multiple tangential displacement portions in the first direction; the first direction is the axial direction of the bellows body. The bellows body includes multiple tangential displacement portions and multiple compensation portions. The tangential displacement portions enable displacement of both ends of the bellows body in the tangential direction, and the compensation portions provide axial compensation. This bellows provides three degrees of freedom of deformation: tangential displacement, straight line, and bending.

Description

Technical Field

[0001] This invention generally relates to the field of corrugated pipe technology, and specifically to a corrugated pipe. Background Technology

[0002] Bellows are a common and important mechanical component, often used for vacuum connections, vibration damping, deformation compensation, etc., and are widely used in vacuum machinery, optical systems, chemical engineering and other fields.

[0003] Currently, most bellows structures are based on a series of circular rings, which are simple in function and can achieve large radius of curvature bending along the axial direction. This allows for tangential displacement of the flanges at both ends. However, the bellows deforms unevenly at this point, with large deformation on the outer side of the bend and small deformation on the inner side, which negatively impacts the service life of the bellows. If tensile or compressive deformation is superimposed at this time, it will cause great damage to the bellows.

[0004] The industrial sector has increasingly demanding functional requirements for bellows. For example, optical vacuum systems often require linear motors to move the manipulated object along the flange plane. This necessitates the use of a bellows capable of tangential displacement to connect an external motor. Otherwise, an internal motor would impose a series of vacuum requirements on the motor and create more complex potential demands on the overall system, significantly increasing costs. Therefore, there is a need for a bellows that can effectively adapt to tangential displacement deformation. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a bellows.

[0006] This invention provides a corrugated pipe, comprising: a corrugated pipe body, the corrugated pipe body including a plurality of tangential misalignment portions and a plurality of compensation portions, the tangential misalignment portions and the compensation portions being arranged sequentially and connected along a first direction, wherein every two tangential misalignment portions are connected together or are separated by at least one compensation portion;

[0007] The tangential misalignment portion includes two misalignment structures that are connected and symmetrically arranged in the first direction, and the two misalignment structures are subjected to different force directions;

[0008] The compensation part is expandable and deformable along the first direction, and the maximum deformation of the plurality of compensation parts in the first direction is not less than the maximum deformation of the plurality of tangential displacement parts in the first direction;

[0009] The first direction is the axial direction of the bellows body.

[0010] In some examples, the offset structure includes a first fold, a first connecting portion, a second fold, and a second connecting portion that are sequentially connected in the circumferential direction of the bellows body;

[0011] The first folded portion includes a first sheet portion and a second sheet portion that are bent and connected. A first recess is formed at the connection between the first sheet portion and the second sheet portion. The second folded portion includes a third sheet portion and a fourth sheet portion that are bent and connected. A second recess is formed at the connection between the third sheet portion and the second sheet portion. The first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion are all obtuse-angled triangular structures.

[0012] The longest side of the first thin sheet portion is equal to and connected with the longest side of the second thin sheet portion, and the longest side of the third thin sheet portion is equal to and connected with the longest side of the fourth thin sheet portion;

[0013] The first connecting portion and the second connecting portion are trapezoidal structures respectively. The two sides of the first connecting portion are the shortest side of the first thin sheet portion and the shortest side of the third thin sheet portion, respectively. The two sides of the second connecting portion are the shortest side of the second thin sheet portion and the shortest side of the fourth thin sheet portion, respectively.

[0014] In some examples, the first sheet portion and the second sheet portion are the same; and / or, the third sheet portion and the fourth sheet portion are the same.

[0015] In some examples, the first sheet portion and the third sheet portion are the same, the second sheet portion and the fourth sheet portion are the same, and the first connecting portion and the second connecting portion are respectively isosceles trapezoidal structures.

[0016] In some examples, the first sheet portion and the second sheet portion are the same.

[0017] In some examples, in the tangential misalignment portion, a first protrusion is formed at the connection of two symmetrically arranged first folded portions, a second protrusion is formed at the connection of two symmetrically arranged second folded portions, a third protrusion is formed at the connection of two symmetrically arranged first connecting portions, and a third recess is formed at the connection of two symmetrically arranged second connecting portions.

[0018] In some examples, the compensation unit includes two frustum-shaped ring structures connected and symmetrically arranged in the first direction, with the small ends of the two frustum-shaped ring structures facing each other and the large ends facing away from each other.

[0019] In some examples, the orthographic projection of the compensation part in the first direction is a trapezoidal ring structure.

[0020] In some examples, the tangential misalignment portion and the compensation portion are distributed alternately along the first direction.

[0021] In some examples, the bellows further includes a flange and a flange connection; the flange is provided at both ends of the bellows body, and the flange is connected to the tangential misalignment part or the compensation part through the flange connection.

[0022] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0023] The bellows provided in this embodiment of the invention includes a bellows body comprising multiple tangential displacement portions and multiple compensation portions. The tangential displacement portions enable tangential displacement at both ends of the bellows body, while the compensation portions provide axial compensation. Simultaneously, this bellows can be used as a standard bellows, providing both axial straight and bending deformation. Therefore, this bellows provides three degrees of freedom of deformation: tangential displacement, straightness, and bending. The bellows has a simple structure and is easy to mass-produce and assemble. Attached Figure Description

[0024] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a bellows provided in an embodiment of the present invention;

[0026] Figure 2 This is a front view schematic diagram of a bellows provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a portion of the structure of the bellows body in the bellows provided in an embodiment of the present invention, viewed from one angle.

[0028] Figure 4 This is a schematic diagram of a portion of the structure of the bellows body in the bellows provided in an embodiment of the present invention from another perspective;

[0029] Figure 5 This is a schematic diagram illustrating the principle of tangential displacement generated by the tangential displacement section in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the compensation unit provided in an embodiment of the present invention;

[0031] Figure 7 A tensile schematic diagram of the compensation part provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the compression of the compensation section provided in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 4 As shown, an embodiment of the present invention provides a corrugated pipe, including: a corrugated pipe body 1, the corrugated pipe body 1 including a plurality of tangential misalignment parts 11 and a plurality of compensation parts 12, the tangential misalignment parts 11 and the compensation parts 12 are arranged sequentially and connected along a first direction A, and every two tangential misalignment parts 11 are connected or at least one compensation part 12 is spaced apart in between.

[0036] The tangential displacement part 11 includes two displacement structures 13 connected and symmetrically arranged in the first direction A, and the two displacement structures 13 are subjected to different force directions;

[0037] The compensation part 12 is expandable and deformable along the first direction A, and the maximum deformation of the multiple compensation parts 12 in the first direction A is not less than the maximum deformation of the multiple tangential displacement parts 11 in the first direction A.

[0038] Wherein, the first direction A is the axial direction of the bellows body 1.

[0039] It should be noted that "tangential" is perpendicular to the first direction A, and "tangential displacement" refers to the displacement of the two ends of the bellows (i.e., at least one of the two ends of the bellows is displaced relative to the first direction A). When tangential displacement occurs, the distance between the two ends of the bellows in the first direction A remains unchanged.

[0040] In the bellows provided in this embodiment, the tangential displacement part 11 can realize the tangential displacement of the bellows body 1. At the same time, the tangential displacement part 11 will have axial deformation, and the compensation part 12 can perform axial compensation, so that the bellows can be specifically used in scenarios where there is tangential displacement.

[0041] In addition, this bellows can be used as a regular bellows, providing axial straight and bending deformation. Therefore, this bellows can provide three degrees of freedom of deformation: tangential displacement, straight line and bending. Furthermore, the bellows has a simple structure and is easy to mass-produce and assemble.

[0042] In some exemplary embodiments, the offset structure 13 includes a first folded portion 131, a first connecting portion 132, a second folded portion 133, and a second connecting portion 134 that are sequentially connected in the circumferential direction of the bellows body;

[0043] The first folded portion 131 includes a first sheet portion 1311 and a second sheet portion 1312 that are bent and connected. A first recess is formed at the connection between the first sheet portion 1311 and the second sheet portion 1312. The second folded portion 133 includes a third sheet portion 1331 and a fourth sheet portion 1332 that are bent and connected. A second recess is formed at the connection between the third sheet portion 1331 and the second sheet portion 1312. The first sheet portion 1311, the second sheet portion 1312, the third sheet portion 1331 and the fourth sheet portion 1332 are all obtuse-angled triangular structures.

[0044] The longest side of the first thin sheet 1311 is equal to and connected with the longest side of the second thin sheet 1312, and the longest side of the third thin sheet 1331 is equal to and connected with the longest side of the fourth thin sheet 1332.

[0045] The first connecting portion 132 and the second connecting portion 134 are trapezoidal structures. The two sides of the first connecting portion 132 are the shortest sides of the first thin sheet portion 1311 and the third thin sheet portion 1331, respectively. The two sides of the second connecting portion 134 are the shortest sides of the second thin sheet portion 1312 and the fourth thin sheet portion 1332, respectively.

[0046] Combination Figure 2 and Figure 3 It is understood that the bellows provided in the embodiments of the present invention can achieve tangential displacement in the direction opposite to the first connecting part 132 and the second connecting part 134, but cannot achieve tangential displacement in the direction opposite to the first folding part 131 and the second folding part 133.

[0047] In some exemplary embodiments, the first sheet portion 1311 and the second sheet portion 1312 are the same; and / or, the third sheet portion 1331 and the fourth sheet portion 1332 are the same.

[0048] The first sheet portion 1311 and the second sheet portion 1312 are the same, which facilitates the formation of the first folded portion 131 and the corresponding first recessed portion;

[0049] The third sheet portion 1331 and the fourth sheet portion 1332 are the same, which facilitates the formation of the second fold portion 133 and the corresponding second recess portion.

[0050] For example, the first sheet portion 1311 and the second sheet portion 1312 are the same, and the third sheet portion 1331 and the fourth sheet portion 1332 are the same, which facilitates the rapid formation of the first fold portion 131 and the second fold portion 133. The first fold portion 131 and the second fold portion 133 are connected with the first connecting portion 132 and the second connecting portion 134 to realize the formation of the shift structure 13, thereby reducing the complexity of the shift structure 13 to a certain extent.

[0051] In some exemplary embodiments, the first sheet portion 1311 and the third sheet portion 1331 are the same, the second sheet portion 1312 and the fourth sheet portion 1332 are the same, and the first connecting portion 132 and the second connecting portion 134 are respectively in the form of isosceles trapezoidal structures.

[0052] In this embodiment, the first folding part 131 and the second folding part 132 are the same, and the first connecting part 132 and the second connecting part 134 are respectively in the form of isosceles trapezoidal structures, which can effectively simplify the misalignment structure 13, thereby simplifying the structure of the corrugated pipe body 1.

[0053] Furthermore, the first thin sheet portion 1311 and the second thin sheet portion 1312 are identical. That is, the first thin sheet portion 1311, the second thin sheet portion 1312, the third thin sheet portion 1331 and the fourth thin sheet portion 1332 are all identical, and the first connecting portion 132 and the second connecting portion 134 are respectively in the form of isosceles trapezoidal structures, which can more effectively simplify the misalignment structure 13 and reduce the complexity of the bellows body 1.

[0054] In some exemplary embodiments, reference is made to Figure 3 and Figure 4 In the tangentially offset portion 11, a first protrusion is formed at the connection of two symmetrically arranged first folded portions 131, a second protrusion is formed at the connection of two symmetrically arranged second folded portions 133, a third protrusion 135 is formed at the connection of two symmetrically arranged first connecting portions 132, and a third recess 136 is formed at the connection of two symmetrically arranged second connecting portions 134.

[0055] In this embodiment, the bellows may be tangentially displaced toward the side where the third protrusion 135 is located; and / or, the bellows may be tangentially displaced toward the side where the third recess 136 is located.

[0056] Reference Figure 2 The first direction A is vertical, and multiple third protrusions 135 are distributed along the first direction A, and multiple third recesses 136 are distributed along the first direction A. The third protrusions 135 are located on the left side, and the third recesses 136 are located on the right side.

[0057] To facilitate the explanation of the deformation principle during tangential displacement of the tangential displacement section, combined with... Figure 2 The two misalignment structures in the tangential misalignment section are divided into an upper misalignment structure and a lower misalignment structure. The direction of the tangential force on the upper misalignment structure is the direction of compression deformation of the first fold and the second fold in the upper misalignment structure; similarly, the direction of the tangential force on the lower misalignment structure is the direction of compression deformation of the first fold and the second fold in the lower misalignment structure.

[0058] When the bellows shifts tangentially toward the side where the third protrusion 135 is located, specifically, the lower shifting structure of each tangential shifting part deforms along the tangential force and simultaneously undergoes axial compressive deformation, while the upper shifting structure does not deform; when the bellows shifts tangentially toward the side where the third recess 136 is located, specifically, the upper shifting structure of each tangential shifting part deforms along the tangential force and simultaneously undergoes axial compressive deformation, while the lower shifting structure does not deform.

[0059] Reference Figure 5 The example of the tangential displacement section shows the lower displacement structure. Dashed box I illustrates the schematic diagram of the lower displacement structure from the front and top views. Similarly, dashed box II also illustrates the schematic diagram of the lower displacement structure from the front and top views. From dashed box I to dashed box II, the lower displacement structure undergoes tangential displacement along the direction of the arrow, while simultaneously undergoing axial compressive deformation.

[0060] In some exemplary embodiments, such as Figure 6 As shown, the compensation unit 12 includes two frustum-shaped ring structures 121 connected and symmetrically arranged in the first direction A. The small ends of the two frustum-shaped ring structures 121 are opposite each other, and the large ends are opposite to each other, enabling tensile and compressive deformation. (Refer to...) Figure 7 The compensation part 12 is in a stretched state; refer to Figure 8 The compensation section 12 is in a compressed state. When tangential misalignment occurs in the tangential misalignment section and axial compression deformation occurs, the compensation section 12 performs passive and equal-amount tensile compensation to ensure that the distance between the two ends of the bellows remains constant.

[0061] Furthermore, the orthographic projection of the compensation part 12 in the first direction A is a trapezoidal ring structure, which ensures that the compensation part 12 and the tangential misalignment part 11 can be aligned and connected.

[0062] Since the tangential misalignment part 11 includes a first folded part 131, a first connecting part 132, a second folded part 133 and a second connecting part 134 connected sequentially in the circumferential direction of the bellows body; correspondingly, the frustum ring structure 121 includes four trapezoidal plate-shaped parts, and the opening formed by the four trapezoidal plate-shaped parts of the frustum ring structure 121 has a trapezoidal structure in the orthogonal projection on the first direction A.

[0063] In some exemplary embodiments, the tangential misalignment portion 11 and the compensation portion 12 are alternately distributed along the first direction A, thereby ensuring that the bellows body deforms as uniformly as possible when tangential misalignment occurs.

[0064] Of course, the tangential displacement parts and the compensation parts can also be arranged in a concentrated manner. The number of tangential displacement parts and compensation parts does not need to be equal. As long as the maximum compensable deformation of the compensation part is greater than the axial deformation of the tangential displacement parts, it is sufficient.

[0065] In some exemplary embodiments, the bellows 1 further includes a flange 14 and a flange connection portion 15; the bellows body 1 has flanges 14 at both ends, and the flanges 14 are connected to the tangential misalignment portion 11 or the compensation portion 12 through the flange connection portion 15.

[0066] Flange 14 can be used to connect to corresponding flanges on other machinery, containers or pipelines. The dimensions of the tangential misalignment part 11 and the compensation part 12 can be designed according to the diameter of flange 14 to ensure the usability, coordination and compactness of the overall structure of the bellows.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] This invention uses terms such as "first," "second," etc., to describe various types of information, but these terms should not be limited to. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information.

[0069] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0070] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A corrugated pipe, characterized in that, include: The bellows body includes multiple tangential misalignment sections and multiple compensation sections. The tangential misalignment sections and the compensation sections are arranged sequentially and connected along a first direction. Each pair of tangential misalignment sections is connected or separated by at least one compensation section. The tangential misalignment portion includes two misalignment structures that are connected and symmetrically arranged in the first direction, and the two misalignment structures are subjected to different force directions. The misalignment structure includes a first fold portion, a first connecting portion, a second fold portion, and a second connecting portion that are sequentially connected in the circumferential direction of the bellows body. The first folded portion includes a first sheet portion and a second sheet portion that are bent and connected. A first recess is formed at the connection between the first sheet portion and the second sheet portion. The second folded portion includes a third sheet portion and a fourth sheet portion that are bent and connected. A second recess is formed at the connection between the third sheet portion and the second sheet portion. The first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion are all obtuse-angled triangular structures. The longest side of the first thin sheet portion is equal to and connected with the longest side of the second thin sheet portion, and the longest side of the third thin sheet portion is equal to and connected with the longest side of the fourth thin sheet portion; The first connecting portion and the second connecting portion are trapezoidal structures respectively. The two sides of the first connecting portion are the shortest side of the first thin sheet portion and the shortest side of the third thin sheet portion, respectively. The two sides of the second connecting portion are the shortest side of the second thin sheet portion and the shortest side of the fourth thin sheet portion, respectively. The compensation part is expandable and deformable along the first direction, and the maximum deformation of the plurality of compensation parts in the first direction is not less than the maximum deformation of the plurality of tangential displacement parts in the first direction; The first direction is the axial direction of the bellows body.

2. The corrugated pipe according to claim 1, characterized in that, The first sheet portion and the second sheet portion are the same; and / or, the third sheet portion and the fourth sheet portion are the same.

3. The corrugated pipe according to claim 1, characterized in that, The first sheet portion is the same as the third sheet portion, the second sheet portion is the same as the fourth sheet portion, and the first connecting portion and the second connecting portion are respectively in the form of an isosceles trapezoidal structure.

4. The corrugated pipe according to claim 2, characterized in that, The first sheet portion and the second sheet portion are the same.

5. The bellows according to any one of claims 1-4, characterized in that, In the tangential misalignment portion, a first protrusion is formed at the connection of two symmetrically arranged first folded portions, a second protrusion is formed at the connection of two symmetrically arranged second folded portions, a third protrusion is formed at the connection of two symmetrically arranged first connecting portions, and a third recess is formed at the connection of two symmetrically arranged second connecting portions.

6. The bellows according to any one of claims 1-4, characterized in that, The compensation unit includes two frustum-shaped ring structures that are connected and symmetrically arranged in the first direction, with the small ends of the two frustum-shaped ring structures facing each other and the large ends facing away from each other.

7. The corrugated pipe according to claim 6, characterized in that, The compensation part has a trapezoidal ring structure when projected onto the first direction.

8. The corrugated pipe according to claim 1, characterized in that, The tangential misalignment portion and the compensation portion are alternately distributed along the first direction.

9. The corrugated pipe according to claim 1, characterized in that, It also includes flanges and flange connections; The bellows body has flanges at both ends, and the flanges are connected to the tangential misalignment part or the compensation part through the flange connection part.

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