Double-layer metal corrugated pipe

Abstract

The utility model relates to the technical field of metal corrugated pipes, and discloses a double-layer metal corrugated pipe which comprises a corrugated pipe body, corrugated pipe connectors are fixedly connected to the two ends of the corrugated pipe body respectively, protective sleeves are arranged outside the corrugated pipe connectors in a sleeved mode, and protective plugs are connected to the interiors of the corrugated pipe connectors in a clamped mode. The side, away from the corrugated pipe, of the protection plug is fixedly connected with a limiting block. According to the technical scheme, the protective sleeve is arranged outside the corrugated pipe connector in the sleeving mode, the corrugated pipe connector can be protected, then the protective plug is plugged into the corrugated pipe connector, the corrugated pipe connector can be prevented from being extruded and deformed in cooperation with the protective sleeve, meanwhile, the protective plug can be rapidly taken out through the limiting block, and the service life of the protective plug is prolonged. And the protective sleeve can be limited and prevented from falling off from the corrugated pipe connector, and convenience and practicability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal bellows, in particular to a double-layer metal bellows. Background Technique

[0002] A metal bellows is a pipe with a regular wavy shape. Common metal bellows are made of carbon steel, stainless steel, steel lined with plastic, aluminum, etc. It is mainly used for non-concentric axial transmission with a very small bending radius, or irregular turning, expansion and contraction, or absorbing the thermal deformation of the pipeline, or for connecting pipelines to pipelines or pipelines to equipment in occasions where it is not convenient to install fixed elbows.

[0003] In the patent document with the published publication number CN218455032U, a double-layer durable metal bellows is disclosed. It includes a bellows assembly. A first connection plate is provided on the left side of the bellows assembly. First connectors are provided at the four corners on the left side of the first connection plate. A second connection plate is provided on the right side of the bellows assembly. First connection holes are provided at the four corners on the right side of the second connection plate. The four first connectors are respectively inserted into the four first connection holes. Connection blocks are provided on the surfaces of the first connection plate and the second connection plate. The connection blocks are slidably connected to the first sliding grooves; first, the ports of the two bellows are welded together, and then the connection blocks on the surfaces of the first connection plate and the second connection plate are slid to insert the first connectors and the first connection holes. The first connection plate and the second connection plate will protect the ports of the two bellows, prevent impurities from accumulating at the ends, thereby accelerating the corrosion of the bellows and reducing its service life.

[0004] Since the interfaces of the existing metal bellows are directly exposed to the outside, the interfaces of the metal bellows are easily deformed by extrusion during handling, which is not conducive to subsequent connection with other bellows. Therefore, a double-layer metal bellows is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a double-layer metal bellows to solve the problems put forward in the background technique.

[0006] The embodiment of the present application provides a double-layer metal bellows, including a bellows. Bellows interfaces are fixedly connected to both ends of the bellows. A protective sleeve is sleeved outside the bellows interfaces. A protective plug is snap-fitted inside the bellows interfaces. A limiting block is fixedly connected to the side of the protective plug away from the bellows.

[0007] By adopting the above technical solution, by sleeving the protective sleeve outside the corrugated pipe interface, the corrugated pipe interface can be protected. Then, the protective plug is inserted into the inside of the corrugated pipe interface. Cooperating with the protective sleeve can prevent the corrugated pipe interface from being squeezed and deformed. At the same time, the limiting block is beneficial to the quick removal of the protective plug and can also limit the protective sleeve to prevent the protective sleeve from falling off the corrugated pipe interface, which is convenient and practical.

[0008] Optionally, a rubber sleeve is fixedly adhered to the inner wall of the protective sleeve.

[0009] By adopting the above technical solution, the rubber sleeve can prevent the protective sleeve from wearing the outer wall of the corrugated pipe interface.

[0010] Optionally, the diameter of the protective plug is adapted to the aperture of the corrugated pipe interface.

[0011] By adopting the above technical solution, it is beneficial for the protective plug to be firmly clamped inside the corrugated pipe interface to prevent the protective plug from falling off.

[0012] Optionally, the protective plug is made of rubber material.

[0013] By adopting the above technical solution, it can prevent the protective plug from wearing the inner wall of the corrugated pipe interface.

[0014] Optionally, the corrugated pipe is a double-layer corrugated pipe.

[0015] By adopting the above technical solution, it is beneficial to improve the service life of the corrugated pipe.

[0016] Optionally, the protective sleeve is made of metal material.

[0017] By adopting the above technical solution, the strength and toughness of the protective sleeve can be improved, and the protection effect on the corrugated pipe interface is improved.

[0018] Optionally, the limiting block is of a cylindrical structure, and the diameter of the limiting block is larger than the aperture of the protective sleeve.

[0019] By adopting the above technical solution, it can prevent the protective sleeve from falling off the corrugated pipe interface.

[0020] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0021] The technical solution of the present application can protect the corrugated pipe interface by sleeving the protective sleeve outside the corrugated pipe interface. Then, the protective plug is inserted into the inside of the corrugated pipe interface. Cooperating with the protective sleeve can prevent the corrugated pipe interface from being squeezed and deformed. At the same time, the limiting block is beneficial to the quick removal of the protective plug and can also limit the protective sleeve to prevent the protective sleeve from falling off the corrugated pipe interface, which is convenient and practical. Description of the Drawings

[0022] Other features, objects, and advantages of the present utility model will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of a double-layer metal bellows of the present utility model;

[0024] Figure 2 It is an exploded structure diagram of a double-layer metal bellows of the present utility model;

[0025] Figure 3 It is a schematic diagram of the structure of a protective sleeve of a double-layer metal bellows of the present utility model.

[0026] In the figure: 1, bellows; 2, bellows interface; 3, protective sleeve; 4, limit block; 5, protective plug; 6, rubber sleeve. Detailed implementation manners

[0027] Please refer to Figures 1-3 , the present utility model provides a technical solution: a double-layer metal bellows, including a bellows 1, both ends of the bellows 1 are fixedly connected with bellows interfaces 2, a protective sleeve 3 is sleeved outside the bellows interfaces 2, a protective plug 5 is snap-fitted inside the bellows interfaces 2, and a limit block 4 is fixedly connected to one side of the protective plug 5 away from the bellows 1.

[0028] In the technical solution of the present utility model, as Figure 3 shown, a rubber sleeve 6 is fixedly adhered to the inner wall of the protective sleeve 3; the rubber sleeve 6 can prevent the protective sleeve 3 from wearing the outer wall of the bellows interface 2.

[0029] In the technical solution of the present utility model, as Figure 2 shown, the diameter of the protective plug 5 is adapted to the aperture of the bellows interface 2; it is beneficial for the protective plug 5 to be firmly snap-fitted inside the bellows interface 2 and prevent the protective plug 5 from falling off.

[0030] In the technical solution of the present utility model, as Figure 2 shown, the protective plug 5 is made of rubber material; it can prevent the protective plug 5 from wearing the inner wall of the bellows interface 2.

[0031] In the technical solution of the present utility model, as Figure 1 shown, the bellows 1 is a double-layer bellows; it is beneficial to improve the service life of the bellows 1.

[0032] In the technical solution of the present utility model, as Figure 1 shown, the protective sleeve 3 is made of metal material; it can improve the strength and toughness of the protective sleeve 3 and enhance the protection effect on the bellows interface 2.

[0033] In the technical solution of the present utility model, as Figure 1 shown, the limiting block 4 is of a cylindrical structure, and the diameter of the limiting block 4 is larger than the aperture of the protective sleeve 3; it can prevent the protective sleeve 3 from falling off the corrugated pipe interface 2.

[0034] Working principle: When carrying the corrugated pipe 1, the protective sleeve 3 can be first sleeved outside the corrugated pipe interface 2 to protect the corrugated pipe interface 2. Then, the protective plug 5 is inserted into the inside of the corrugated pipe interface 2. Cooperating with the protective sleeve 3 can prevent the corrugated pipe interface 2 from being squeezed and deformed. At the same time, the limiting block 4 is beneficial to the quick removal of the protective plug 5 and can also limit the protective sleeve 3 to prevent the protective sleeve 3 from falling off the corrugated pipe interface 2, which is convenient and practical.

[0035] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A double-layer metal bellows, characterized in that: The invention comprises a bellows (1), both ends of the bellows (1) are fixedly connected to bellows interfaces (2), the outer sleeve of the bellows interface (2) is provided with a protective sleeve (3), the inner snap-fitting connection of the bellows interface (2) is provided with a protective plug (5), and the side of the protective plug (5) away from the bellows (1) is fixedly connected to a limiting block (4).

2. A double-layer metal bellows according to claim 1, characterized in that: A rubber sleeve (6) is glued and fixed to the inner wall of the protective sleeve (3).

3. A double-layer metal bellows according to claim 1, characterized in that: The diameter of the protective plug (5) is matched to the aperture of the bellows interface (2).

4. A double-layer metal bellows according to claim 1, characterized in that: The protective plug (5) is made of rubber material.

5. A double-layer metal bellows according to claim 1, characterized in that: The corrugated pipe (1) is a double-layer corrugated pipe.

6. A double-layer metal bellows according to claim 1, characterized in that: The protective sleeve (3) is made of metal material.

7. A double-layer metal bellows according to claim 1, characterized in that: The limiting block (4) is a cylindrical structure, and the diameter of the limiting block (4) is larger than the aperture of the protective sleeve (3).

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