A bellows structure

Abstract

The utility model belongs to the technical field of electronic product cooling, disclose a kind of bellows structure, including bellows, bellows includes at least two layers of metal layer, all metal layer is sequentially arranged along the radial direction of bellows, in every adjacent two layers of metal layer, the metal layer located in outer layer is covered on the outer wall of the metal layer located in inner layer, and one of every adjacent two layers of metal layer is copper layer, another is stainless steel layer, to improve the flexibility and sealing property of bellows by this.

Description

Technical Field

[0001] This utility model relates to the field of electronic product cooling technology, and in particular to a corrugated pipe structure. Background Technology

[0002] High-performance chips typically require cooling devices to lower their temperature. In existing technologies, the coolant in these devices flows through corrugated pipes.

[0003] Existing corrugated pipes are often made from austenitic stainless steel round tubes through an expansion corrugation process. The ductility of austenitic stainless steel largely depends on the deformation capacity of its face-centered cubic crystal structure. Its deformation capacity is weakened after local necking, and the poor microstructure uniformity of austenitic stainless steel itself leads to poor flexibility in the corrugated pipes. Furthermore, during the expansion corrugation process, austenitic stainless steel round tubes are prone to pitting or scratch defects, which can easily lead to micropore leakage and severely reduce the sealing performance of the corrugated pipe.

[0004] Therefore, there is an urgent need to propose a corrugated pipe structure to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a corrugated pipe structure that can improve the flexibility and sealing performance of the corrugated pipe.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A corrugated pipe structure includes a corrugated pipe comprising at least two metal layers arranged sequentially along the radial direction of the corrugated pipe. In each pair of adjacent metal layers, the outer metal layer covers the outer wall of the inner metal layer, and one of each pair of adjacent metal layers is a copper layer and the other is a stainless steel layer.

[0008] Optionally, the number of bellows is at least two, and all bellows are nested in sequence. Each bellows has a corrugated section, which includes multiple peaks and multiple troughs. The multiple peaks and multiple troughs are alternately arranged along the axial direction of the bellows. Along the radial direction of the bellows, the peaks of two adjacent bellows are arranged opposite each other, and the troughs of two adjacent bellows are arranged opposite each other.

[0009] Optionally, a gap is left between every two adjacent bellows along the radial direction of the bellows.

[0010] Optionally, the corrugated pipe also includes a straight pipe section. The straight pipe section and the corrugated section are distributed along the axial direction of the corrugated pipe. In two adjacent corrugated pipes, the inner diameter of the straight pipe section of the outer corrugated pipe is a, and the outer diameter of the straight pipe section of the inner corrugated pipe is b, where 0.01mm≤ab≤0.5mm.

[0011] Optionally, the ratio of the thickness of the copper layer to the thickness of the stainless steel layer is 10%-90%.

[0012] Optionally, the thickness of the copper layer is greater than or equal to 0.01 mm.

[0013] Optionally, the thickness of the stainless steel layer is greater than or equal to 0.03 mm.

[0014] Optionally, the number of metal layers can be two or three.

[0015] Optionally, the innermost metal layer among all metal layers is a copper layer.

[0016] Optionally, the copper layer is an oxygen-free copper layer, a pure copper layer, or an alloy copper layer, and the stainless steel layer is a SUS316L layer or a SUS304L layer.

[0017] The beneficial effects of this utility model are:

[0018] The corrugated pipe structure provided by this utility model includes at least two metal layers, all of which are arranged sequentially along the radial direction of the corrugated pipe. In each pair of adjacent metal layers, the outer metal layer covers the outer wall of the inner metal layer, and one of each pair of adjacent metal layers is a copper layer and the other is a stainless steel layer. Compared with the stainless steel layer, the copper atoms in the copper layer are more regularly arranged, resulting in less sliding resistance and thus greater ductility. Therefore, combining the copper and stainless steel layers can improve the overall flexibility of the corrugated pipe, thereby significantly increasing its flexural strength. In addition, when the corrugated pipe is manufactured using the expansion corrugation process, copper atoms can flow into the cracks on the surface of the stainless steel layer, thereby improving the overall sealing performance of the corrugated pipe and reducing the probability of micropore leakage. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the corrugated pipe provided in Embodiment 1 of this utility model;

[0020] Figure 2 This is a cross-sectional structural schematic diagram of the corrugated pipe structure provided in Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the corrugated pipe structure provided in Embodiment 1 of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the corrugated pipe provided in Embodiment 2 of this utility model.

[0023] In the picture:

[0024] 100, Corrugated pipe; 110, Metal layer; 111, Copper layer; 112, Stainless steel layer; 210, Corrugated section; 220, Straight pipe section. Detailed Implementation

[0025] 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 present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] Example 1

[0030] This embodiment provides a bellows structure that can improve the flexibility and sealing performance of the bellows.

[0031] Specifically, such as Figure 1As shown, the corrugated pipe structure includes a corrugated pipe 100, which includes at least two metal layers 110. For example, the number of metal layers 110 can be two, three, four or more. All metal layers 110 are arranged sequentially along the radial direction of the corrugated pipe 100. In each pair of adjacent metal layers 110, the outer metal layer 110 covers the outer wall of the inner metal layer 110. In each pair of adjacent metal layers 110, one is a copper layer 111 and the other is a stainless steel layer 112.

[0032] Compared to the stainless steel layer 112, the copper atoms in the copper layer 111 are more regularly arranged, resulting in lower sliding resistance and thus greater ductility. Therefore, combining the copper layer 111 and the stainless steel layer 112 improves the overall flexibility of the bellows 100, significantly increasing its flexural strength. Furthermore, when the bellows 100 is manufactured using an expansion corrugation process, copper atoms can flow into the cracks on the surface of the stainless steel layer, thereby improving the overall sealing performance of the bellows 100 and reducing the likelihood of micropore leakage.

[0033] It should be noted that the above-mentioned corrugated process is a common production process in this field, so its specific process flow and principle will not be elaborated here.

[0034] It should also be noted that the process of bonding the copper layer 111 and the stainless steel layer 112 into a single unit before corrugation is a common manufacturing process in the field. For example, a stainless steel tube is fitted over a copper tube to form a sleeve. The sleeve is heated, and during this heating process, copper molecules and various metal molecules in the stainless steel diffuse to form a composite tube semi-finished product. This composite tube semi-finished product is then repeatedly drawn until it reaches a suitable diameter, thus forming a composite tube. Alternatively, a copper plate is stacked on a stainless steel plate and then heated for a period of time. During this heating process, copper molecules and various metal molecules in the stainless steel diffuse to form a composite plate. The composite plate is rolled into a circle and the seam is welded to form a composite tube semi-finished product. This composite tube semi-finished product is then repeatedly drawn until it reaches a suitable diameter, thus forming a composite tube.

[0035] Because stainless steel contains various alloy components, its microstructure is less uniform than that of copper. Stainless steel is prone to pitting defects, while copper atoms are more regularly arranged and have less sliding resistance. Therefore, copper has greater ductility. During the diffusion process of copper molecules and various metal molecules in stainless steel, copper atoms embed into the pits and defects on the surface of stainless steel, thereby improving the overall sealing performance of the composite pipe.

[0036] Optionally, the number of metal layers 110 is two or three, in order to minimize the production cost of the bellows 100.

[0037] Optionally, the innermost metal layer 110 among all metal layers 110 is a copper layer 111. Since the reactivity of copper is much lower than that of iron in stainless steel, using copper layer 111 as the innermost metal layer 110 can significantly improve the chemical corrosion resistance of the bellows 100, thereby improving the reliability of the bellows 100.

[0038] In this embodiment, the number of metal layers 110 is three. Therefore, in this embodiment, the metal layer 110 includes two copper layers 111 and one stainless steel layer 112, wherein the stainless steel layer 112 is sandwiched between the two copper layers 111.

[0039] Of course, in other embodiments, two of the three metal layers 110 may be stainless steel layers 112, and one may be copper layer 111, with the copper layer 111 sandwiched between the two stainless steel layers 112.

[0040] Optionally, the ratio of the thickness of the copper layer 111 to the thickness of the stainless steel layer 112 is 10%-90%. For example, the ratio of the thickness of the copper layer 111 to the thickness of the stainless steel layer 112 can be 10%, 15%, 50%, 65%, 85%, or 90%, etc., to improve the success rate of the composite of the copper layer 111 and the stainless steel layer 112, that is, to improve the yield of the composite pipe.

[0041] Optionally, the thickness of the copper layer 111 is greater than or equal to 0.01 mm. For example, the thickness of the copper layer 111 can be 0.01 mm, 0.02 mm, or 0.03 mm. If the thickness of the copper layer 111 is less than 0.01 mm, the thickness of the copper layer 111 is too thin. When the copper layer 111 and the stainless steel layer are combined into a composite pipe, the performance of the copper layer 111 itself will be reduced, thereby reducing the overall performance of the corrugated pipe 100. Therefore, maintaining the thickness of the copper layer 111 at more than 0.01 mm can provide a guarantee for the overall performance of the corrugated pipe 100.

[0042] Optionally, the thickness of the stainless steel layer 112 is greater than or equal to 0.03 mm. For example, the thickness of the stainless steel layer 112 can be 0.03 mm, 0.04 mm, or 0.05 mm. If the thickness of the stainless steel layer 112 is less than 0.03 mm, the thickness of the stainless steel layer 112 is too thin. When the copper layer 111 and the stainless steel layer are combined into a composite pipe, the performance of the stainless steel layer 112 itself will be reduced, thereby reducing the overall performance of the corrugated pipe 100. Therefore, maintaining the thickness of the stainless steel layer 112 at more than 0.03 mm can provide a guarantee for the overall performance of the corrugated pipe 100.

[0043] Optionally, the copper layer 111 is an oxygen-free copper layer, a pure copper layer, or an alloy copper layer, and the stainless steel layer 112 is a SUS316L layer or a SUS304L layer. The elongation properties of oxygen-free copper, pure copper, and alloy copper are relatively close to those of SUS316L and SUS304L. Therefore, using an oxygen-free copper layer, a pure copper layer, or an alloy copper layer as the copper layer 111 and using a SUS316L layer or a SUS304L layer as the stainless steel layer 112 can improve the bulging effect on the bellows 100.

[0044] Optionally, such as Figure 2 and Figure 3 As shown, the number of bellows 100 is at least two. Exemplarily, the number of bellows 100 can be two, three, or four, etc. All bellows 100 are nested sequentially. Each bellows 100 has a corrugated section 210, which includes multiple crests and multiple troughs. The crests and troughs are alternately arranged along the axial direction of the bellows 100. Along the radial direction of the bellows 100, the crests of two adjacent bellows 100 are arranged opposite each other, and the troughs of two adjacent bellows 100 are arranged opposite each other. With the total wall thickness of the bellows structure being the same, compared to a single bellows 100, this structure of nesting multiple bellows 100 sequentially can reduce the wall thickness of each bellows 100, thus improving the flexibility of each bellows 100, thereby achieving the effect of improving the overall flexibility of the bellows structure. This effect is particularly noticeable when the wall thickness of the corrugated pipe structure is relatively thick. For example, when the wall thickness of the corrugated pipe structure is greater than 0.3 mm, compared to using a single corrugated pipe 100 with a wall thickness greater than 0.3 mm, the technical solution provided in this embodiment can use two or three corrugated pipes 100 with a wall thickness less than 0.3 mm to form a corrugated pipe structure in sequence. This can reduce the wall thickness of a single corrugated pipe 100 in the corrugated pipe structure, thereby improving the flexibility of a single corrugated pipe 100 in the corrugated pipe structure.

[0045] On the other hand, this structure, which uses multiple bellows 100 nested sequentially, improves the overall sealing performance of the bellows structure. Specifically, when a micropore appears in one of the bellows 100, but not in the others, the overall bellows structure still maintains a good sealing effect. Therefore, this structure, with multiple bellows 100 nested sequentially, improves the overall reliability of the bellows structure. This effect is particularly pronounced when the wall thickness of the bellows structure is thin. For example, when the wall thickness is less than 0.03 mm, the wall thickness of each individual bellows 100 is less than 0.03 mm. Because the wall thickness of each individual bellows 100 is thin, the probability of a micropore appearing in that single bellows 100 increases. However, even when a micropore appears in one bellows 100, because the bellows structure consists of multiple bellows 100 nested sequentially, the overall bellows structure still maintains good sealing performance as long as the other bellows 100 do not have micropores.

[0046] The number of peaks and troughs can be fifty, sixty, or sixty-five, depending on the actual usage requirements.

[0047] Preferably, the wall thickness of the bellows structure is between 0.06mm and 0.25mm. If the wall thickness is less than 0.06mm, the probability of micropores appearing in a single bellows 100 increases. If the wall thickness is greater than 0.25mm, the wall thickness of a single bellows 100 becomes too thick, thus reducing the flexibility of both the individual bellows 100 and the overall bellows structure. Therefore, a wall thickness of 0.06mm-0.25mm improves both the flexibility and the sealing performance of the bellows structure. Preferably, the inner diameter of the bellows structure (i.e., the inner diameter of the innermost bellows 100) is between 1mm and 50mm.

[0048] Furthermore, along the radial direction of the corrugated pipe 100, a gap is left between every two adjacent corrugated pipes 100. On the one hand, during the production process, this structure facilitates the sequential nesting of several corrugated pipes 100 to form a corrugated pipe structure. On the other hand, during the bending of the corrugated pipe structure, this structure provides clearance space between two adjacent corrugated pipes 100, which is conducive to further improving the overall flexibility of the corrugated pipe structure.

[0049] Furthermore, the corrugated pipe 100 is also provided with a straight pipe section 220. The straight pipe section 220 and the corrugated section 210 are distributed along the axial direction of the corrugated pipe 100. In two adjacent corrugated pipes 100, the inner diameter of the straight pipe section 220 of the outer corrugated pipe 100 is a, and the outer diameter of the straight pipe section 220 of the inner corrugated pipe 100 is b, where 0.01mm≤ab≤0.5mm. For example, ab can be 0.01mm, 0.06mm, 0.1mm, 0.35mm, 0.4mm, or 0.5mm, etc. This ensures that there is sufficient clearance space between two adjacent corrugated pipes 100 and makes the overall structure of the corrugated pipe more compact.

[0050] In this embodiment, the corrugated pipe 100 is provided with two straight pipe sections 220, and the two ends of the corrugated section 210 are respectively connected to the two straight pipe sections 220.

[0051] It should be noted that, Figure 3The diagram shows a schematic of a corrugated pipe structure. Since the corrugated pipe structure is formed by at least two corrugated pipes 100 nested together in sequence, and the crests of two adjacent corrugated pipes 100 are arranged opposite each other, and the troughs of two adjacent corrugated pipes 100 are arranged opposite each other, the corrugated section 210 of the corrugated pipe structure is the corrugated section 210 of the corrugated pipe 100, the straight pipe section 220 of the corrugated pipe structure is the straight pipe section 220 of the corrugated pipe 100, the crest of the corrugated pipe structure is the crest of the corrugated pipe 100, and the trough of the corrugated pipe structure is the trough of the corrugated pipe 100.

[0052] Optionally, the two ends of the corrugated pipe structure are welded to two connectors respectively. Since each corrugated pipe 100 in the corrugated pipe structure includes a copper layer 111 and a stainless steel layer 112, during welding, the pit defects that appear in the stainless steel layer 112 when expanding the corrugation will be amplified. Since the melting point of copper material is low, the surface of the copper layer 111 can easily be micro-melted, allowing copper atoms to penetrate into the pit defects of the stainless steel layer 112, thereby filling the defects of the stainless steel layer 112 and improving the yield of the welding position of the corrugated pipe structure.

[0053] The corrugated pipe structure provided in this embodiment has good flexibility and high sealing performance. Furthermore, the overall structure of the corrugated pipe is simple, which can help reduce production difficulty and production costs.

[0054] Example 2

[0055] This embodiment provides a bellows structure. The following mainly describes the differences between this embodiment and Embodiment 1, while the similarities will not be repeated.

[0056] like Figure 4 As shown, there are two metal layers 110, one of which is a copper layer 111 and the other is a stainless steel layer 112, with the stainless steel layer 112 covering the outer wall of the copper layer 111. Of course, in other embodiments, the copper layer 111 may cover the outer wall of the stainless steel layer 112.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bellows structure, characterized in that, The device includes a bellows (100) comprising at least two metal layers (110), all of which are arranged sequentially along the radial direction of the bellows (100). In each pair of adjacent metal layers (110), the outer metal layer (110) covers the outer wall of the inner metal layer (110), and one of each pair of adjacent metal layers (110) is a copper layer (111) and the other is a stainless steel layer (112).

2. The bellows structure of claim 1, wherein The number of the corrugated pipes (100) is at least two, and all the corrugated pipes (100) are nested in sequence. Each corrugated pipe (100) has a corrugated section (210), which includes multiple peaks and multiple troughs. The multiple peaks and multiple troughs are alternately arranged along the axial direction of the corrugated pipe (100). Along the radial direction of the corrugated pipe (100), the peaks of two adjacent corrugated pipes (100) are arranged opposite each other, and the troughs of two adjacent corrugated pipes (100) are arranged opposite each other.

3. The bellows structure of claim 2, wherein, Along the radial direction of the bellows (100), a gap is left between every two adjacent bellows (100).

4. The bellows structure of claim 3, wherein, The corrugated pipe (100) is also provided with a straight pipe section (220). The straight pipe section (220) and the corrugated section (210) are distributed along the axial direction of the corrugated pipe (100). In two adjacent corrugated pipes (100), the inner diameter of the straight pipe section (220) of the outer corrugated pipe (100) is a, and the outer diameter of the straight pipe section (220) of the inner corrugated pipe (100) is b, where 0.01mm≤ab≤0.5mm.

5. The bellows structure according to any one of claims 1-4, characterized in that, The ratio of the thickness of the copper layer (111) to the thickness of the stainless steel layer (112) is 10%-90%.

6. A bellows structure according to any one of claims 1-4, characterized in that The thickness of the copper layer (111) is greater than or equal to 0.01 mm.

7. The bellows structure according to any one of claims 1-4, characterized in that, The thickness of the stainless steel layer (112) is greater than or equal to 0.03 mm.

8. A bellows structure according to any one of claims 1-4, characterized in that The number of metal layers (110) is two or three.

9. The bellows structure according to any one of claims 1-4, characterized in that, The innermost metal layer (110) among all the metal layers (110) is the copper layer (111).

10. The bellows structure according to any one of claims 1-4, characterized in that, The copper layer (111) is an oxygen-free copper layer, a pure copper layer, or an alloy copper layer, and the stainless steel layer (112) is a SUS316L layer or a SUS304L layer.

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