A metal bellows

Abstract

The utility model belongs to the technical field of metal bellows, in particular to a metal bellows, comprising a metal bellows body, flanges are fixed at both ends of the metal bellows body, the metal bellows also comprises: a connecting column, a plurality of connecting columns are installed between two flanges at equal intervals along the circumferential direction, and both ends of the connecting column have external threads, and the ends of the connecting columns pass through the flanges; a nut; a mounting sleeve; an arc-shaped limit plate; the metal bellows of the utility model uses four connecting columns evenly spaced in the circumferential direction to improve the structural strength of the metal bellows body, a No. 1 support spring and a No. 2 support spring are used to buffer the axial thermal deformation of the metal bellows body, and the arc-shaped limit plate and the No. 3 support spring are used to limit and buffer the radial thermal deformation of the metal bellows body, which greatly improves the safety of the metal bellows, avoids thermal deformation damage of the metal bellows, and extends the service life of the metal bellows.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal bellows, and in particular relates to a metal bellows. Background Art

[0002] Metal bellows is a kind of pipe with regular wave-like appearance. Commonly used metal bellows are carbon steel, stainless steel, steel lined with plastic, aluminum, etc. They are mainly used for non-concentric axial transmission with a very small bending radius, or irregular turning, expansion and contraction, or absorbing thermal deformation of pipes, or for connecting pipes to pipes or pipes to equipment in situations where it is not convenient to install with fixed elbows.

[0003] It is well known that the corrugated section on the metal bellows can absorb the thermal deformation of the pipe. However, the traditional metal bellows lacks the necessary safety protection structure when in use. When the metal bellows transports heat medium, in addition to axial deformation, radial deformation will also occur, which can easily lead to damage to the metal bellows. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a metal bellows, which has the characteristics of easy use, high safety performance and long service life.

[0005] To achieve the above object, the utility model provides the following technical solution: a metal bellows, comprising a metal bellows body, flanges are fixed at both ends of the metal bellows body, and the metal bellows also includes:

[0006] Connecting columns, a plurality of connecting columns are installed between the two flanges at equal intervals along the circumferential direction, and both ends of the connecting columns have external threads, and the ends of the connecting columns penetrate the flanges;

[0007] A nut, the nut being installed on the protruding end of the connecting column by screwing, and a No. 2 supporting spring being sleeved on the connecting column and located between the nut and the flange;

[0008] A mounting sleeve, wherein a plurality of the mounting sleeves are sleeved and fixed on the connecting column;

[0009] An arc-shaped limit plate is elastically connected to the mounting sleeve, and an arc opening of the arc-shaped limit plate faces the metal bellows body.

[0010] As a preferred technical solution of the present utility model, four of the connecting columns and the arc-shaped limiting plates are arranged at equal intervals along the circumferential direction.

[0011] As a preferred technical solution of the utility model, five installation sleeves are arranged at equal intervals along the length direction of the connecting column.

[0012] As a preferred technical solution of the utility model, a limiting ring is also fixed on the connecting column, and a No. 1 supporting spring is also sleeved on the connecting column and is located between the flange and the limiting ring.

[0013] As a preferred technical solution of the utility model, it also includes a No. 3 support spring, a connecting block is fixed to the outer wall of the arc-shaped limit plate, a connecting piece is fixed to the outer wall of the mounting sleeve, a guide column arranged to pass through the connecting piece is fixed on the connecting block, and a limiting disk is fixed on the protruding end of the guide column, and the No. 3 support spring is sleeved on the guide column and is located between the connecting piece and the connecting block.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the metal bellows of the utility model utilizes four connecting columns equally spaced in the circumferential direction to improve the structural strength of the metal bellows body, the No. 1 support spring and the No. 2 support spring are used to buffer the axial thermal deformation of the metal bellows body, and the arc-shaped limit plate and the No. 3 support spring are used together to limit and buffer the radial thermal deformation of the metal bellows body, which greatly improves the safety of the metal bellows, avoids thermal deformation damage of the metal bellows, and extends the service life of the metal bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For this utility model Figure 1 A is an enlarged structural diagram;

[0018] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in FIG.

[0019] In the figure: 1. Metal bellows body; 2. Flange; 3. Connecting column; 4. External thread; 5. Nut; 6. Limiting ring; 7. No. 1 supporting spring; 8. Mounting sleeve; 9. Arc-shaped limiting plate; 10. No. 2 supporting spring; 11. Connecting piece; 12. Connecting block; 13. Guide column; 14. Limiting plate; 15. No. 3 supporting spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a metal bellows, comprising a metal bellows body 1, flanges 2 are fixed at both ends of the metal bellows body 1, the metal bellows also includes: a connecting column 3, a plurality of connecting columns 3 are installed between the two flanges 2 at equal intervals along the circumferential direction, and both ends of the connecting column 3 have external threads 4, and the ends of the connecting column 3 pass through the flange 2; a nut 5, the nut 5 is installed on the protruding end of the connecting column 3 by threaded engagement, and a No. 2 support spring 10 is sleeved on the connecting column 3 and is located between the nut 5 and the flange 2; a mounting sleeve 8, a plurality of mounting sleeves 8 are sleeved and fixed on the connecting column 3; an arc-shaped limit plate 9, the arc-shaped limit plate 9 is elastically connected to the mounting sleeve 8, and the arc mouth of the arc-shaped limit plate 9 faces the metal bellows body 1. When in use, the metal The bellows body 1 can be connected to the pipeline system. When the metal bellows body 1 transports hot medium, the metal bellows body 1 will produce axial and radial thermal deformation. For axial thermal deformation, due to the principle of thermal expansion and contraction, the metal bellows body 1 will produce axial stretching. At this time, the No. 2 support spring 10 compresses and buffers the axial stretching of the metal bellows body 1 to ensure safety; for radial thermal deformation, the metal bellows body 1 will produce radial expansion, and the arc-shaped limit plate 9 is used to limit the radial expansion of the metal bellows body 1. At the same time, the elastically installed arc-shaped limit plate 9 will also buffer the radial expansion of the metal bellows body 1 to ensure safety, which greatly improves the safety of the metal bellows body 1, avoids thermal deformation and damage of the metal bellows body 1, and extends the service life of the metal bellows body 1.

[0022] Specifically, according to the attached Figure 1 As shown, in this embodiment, four connecting columns 3 and four arc-shaped limiting plates 9 are arranged at equal intervals along the circumferential direction, and the stability is good.

[0023] Specifically, according to the attached Figure 1 As shown, in this embodiment, five mounting sleeves 8 are arranged at equal intervals along the length direction of the connecting column 3 to ensure the stability of the installation of the arc-shaped limiting plate 9.

[0024] Specifically, according to the attached Figure 1As shown, in this embodiment, a limiting ring 6 is also fixed on the connecting column 3, and a No. 1 support spring 7 is also sleeved on the connecting column 3 and is located between the flange 2 and the limiting ring 6, which cooperates with the No. 2 support spring 10 to achieve dynamic balance and ensure the stability and safety of the metal bellows body 1.

[0025] Specifically, according to the attached Figure 1 and attached Figure 3 As shown, in this embodiment, it also includes a No. 3 support spring 15, a connecting block 12 is fixed on the outer wall of the arc-shaped limit plate 9, a connecting piece 11 is fixed on the outer wall of the mounting sleeve 8, a guide column 13 is fixed on the connecting block 12 and is arranged to pass through the connecting piece 11, and a limiting disk 14 is fixed on the protruding end of the guide column 13, the No. 3 support spring 15 is sleeved on the guide column 13 and is located between the connecting piece 11 and the connecting block 12, the No. 3 support spring 15 realizes the elastic installation of the arc-shaped limit plate 9, when the metal bellows body 1 generates radial expansion, the arc-shaped limit plate 9 is forced to move toward the outside and compress the No. 3 support spring 15, the No. 3 support spring 15 buffers the radial expansion of the metal bellows body 1 to ensure safety.

[0026] Working principle and use process of the utility model: When the metal bellows body 1 of the utility model is used, the metal bellows body 1 can be connected to the pipeline system. When the metal bellows body 1 transports the heat medium, the metal bellows body 1 will produce axial and radial thermal deformation. For the axial thermal deformation, due to the principle of thermal expansion and contraction, the metal bellows body 1 will produce axial stretching. At this time, the second support spring 10 compresses and buffers the axial stretching of the metal bellows body 1 to ensure safety;

[0027] For radial thermal deformation, the metal bellows body 1 will produce radial expansion, and the arc-shaped limit plate 9 is used to limit the radial expansion of the metal bellows body 1. At the same time, the elastically installed arc-shaped limit plate 9 will also buffer the radial expansion of the metal bellows body 1 to ensure safety, thereby greatly improving the safety of the metal bellows body 1, avoiding thermal deformation and damage of the metal bellows body 1, and extending the service life of the metal bellows body 1.

[0028] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In addition, in the description of the embodiments of the present invention, unless otherwise clearly stipulated and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. 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 directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A metal bellows, comprising a metal bellows body (1), flanges (2) being fixed at both ends of the metal bellows body (1), characterized in that: The metal bellows also includes: A connecting column (3), wherein a plurality of the connecting columns (3) are installed between the two flanges (2) at equal intervals along the circumferential direction, and both ends of the connecting column (3) are provided with external threads (4), and the ends of the connecting columns (3) penetrate the flanges (2); A nut (5), the nut (5) being mounted on the protruding end of the connecting column (3) by means of a threaded engagement, and a second supporting spring (10) being sleeved on the connecting column (3) and located between the nut (5) and the flange (2); A mounting sleeve (8), wherein a plurality of the mounting sleeves (8) are sleeved and fixed on the connecting column (3); An arc-shaped limit plate (9), wherein the arc-shaped limit plate (9) is elastically connected to the mounting sleeve (8), and the arc opening of the arc-shaped limit plate (9) faces the metal bellows body (1).

2. A metal bellows according to claim 1, characterized in that: Four of the connecting columns (3) and the arc-shaped limiting plates (9) are arranged at equal intervals along the circumferential direction.

3. A metal bellows according to claim 1, characterized in that: Five installation sleeves (8) are arranged at equal intervals along the length direction of the connection column (3).

4. A metal bellows according to claim 1, characterized in that: A limiting ring (6) is also fixed on the connecting column (3), and a No. 1 supporting spring (7) is also sleeved on the connecting column (3) and is located between the flange (2) and the limiting ring (6).

5. The metal bellows according to claim 1, characterized in that: It also includes a No. 3 support spring (15), a connecting block (12) is fixed on the outer wall of the arc-shaped limit plate (9), a connecting sheet (11) is fixed on the outer wall of the mounting sleeve (8), a guide column (13) is fixed on the connecting block (12) and is arranged to pass through the connecting sheet (11), and a limit plate (14) is fixed on the protruding end of the guide column (13), and the No. 3 support spring (15) is sleeved on the guide column (13) and is located between the connecting sheet (11) and the connecting block (12).

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