Metal welding corrugated pipe with long fatigue life

Abstract

The utility model relates to the technical field of metal welding corrugated pipes, and discloses a long-fatigue-life metal welding corrugated pipe which comprises a metal corrugated pipe body, a first connector is welded to the front end of the metal corrugated pipe body, and a second connector is welded to the rear end of the metal corrugated pipe body. A mounting sliding groove is formed in the surface of the first connector, and a limiting clamping ring is slidably connected into the mounting sliding groove. When the limiting nuts at the front end and the rear end are rotated to be taken down from the surfaces of the limiting clamping rings and the threaded connectors, the rubber protection columns are installed in the first connector and the second connector, and then the limiting clamping rings and the limiting nuts are matched for limiting and fixing; limiting screws are arranged to be rotationally taken out from the interiors of the first connector and the second connector, connecting plates and limiting columns are pulled to be taken down from the surface of a rubber protection plate, the inner metal corrugated pipe can be effectively protected when being used through cooperation of the rubber protection plate and a rubber protection column, and the service life of the metal corrugated pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metal welded bellows, in particular to metal welded bellows with high fatigue life. Background Art

[0002] A metal welded bellows is a flexible pipe made by precision welding of thin hollow diaphragms formed by stamping. It has characteristics such as pressure resistance, temperature resistance, corrosion resistance, and good sealing performance. The welded bellows has a large deformation amount and a long service life, and is widely used in fields such as instruments, aerospace, and the electronics industry. Welding technologies include tungsten inert gas shielded welding, microbeam plasma welding, electron beam welding, and laser welding, etc.

[0003] Compare the metal welded bellows with the publication number 202323233122.9, which includes a corrugated pipe fitting. The corrugated pipe fitting includes a number of first diaphragms and second diaphragms, and the number of first diaphragms and second diaphragms are arranged alternately and are sequentially sealed and welded. The first diaphragms and second diaphragms located at both ends of the corrugated pipe fitting are respectively sealed and welded with end cover wave plates. The end cover wave plates located at both ends are respectively sealed and welded with a first joint and a second joint. Further, both the first diaphragm and the second diaphragm include a flat portion and an annular elastic portion located on the outer edge of the flat portion. The annular elastic portion includes an annular inclined section and an annular welding section located on the outer edge of the annular inclined section. The inclined directions of the annular inclined sections of the first diaphragm and the second diaphragm are opposite. Further, the adjacent two first diaphragms and second diaphragms where the annular inclined sections approach each other are sealed and welded through the annular welding section, and the adjacent two first diaphragms and second diaphragms where the annular inclined sections are far away from each other are sealed and welded through the flat portion. Further, the annular inclined section is in a wavy shape formed by a number of arcs, and the arch heights of the number of arcs gradually decrease from the inside to the outside. The stress in each direction of the diaphragm is small, which is beneficial to improving the service life; at the same time, the welding strength between the first diaphragm and the second diaphragm located at the end and the first joint and the second joint can be enhanced through the end cover wave plates, so that the first inner circular weld and the first outer circular weld, which are the weakest at the end, in the bellows assembly are both strengthened, thereby improving the structural strength and reliability of the bellows assembly.

[0004] For this metal welded bellows, the welding strength between the first diaphragm and the second diaphragm located at the end and the first joint and the second joint can be enhanced through the end cover wave plates, so that the first inner circular weld and the first outer circular weld, which are the weakest at the end, in the bellows assembly are both strengthened, thereby improving the structural strength and reliability of the bellows assembly. However, when the whole device is in use, it is not convenient to provide effective protection for the metal welded bellows, making the metal welded bellows prone to external collisions, affecting the service life of the metal welded bellows. Summary of the Utility Model

[0005] To solve the above technical problems, the present utility model provides a metal welded bellows with high fatigue life.

[0006] The present utility model is realized by the following technical solutions: A metal welded bellows with high fatigue life, including a metal bellows, a first joint is welded to the front end of the metal bellows, and a second joint is welded to the rear end of the metal bellows;

[0007] An installation chute is provided on the surface of the first joint, a limit snap ring is slidably connected inside the installation chute, a threaded connector is threadedly connected inside the first joint, a limit nut is threadedly connected to the surface of the threaded connector, a rubber protection column is fixedly connected to the surface of the threaded connector, a limit card slot is provided inside the first joint, a rubber protection plate is clamped inside the limit card slot, a limit screw rod is threadedly connected inside the first joint, a connecting plate is threadedly connected to the surface of the limit screw rod, and a limit column is welded to the bottom end of the connecting plate.

[0008] As a further improvement of the above solution, the installation chutes are symmetrically distributed with the first joint as the center, the installation chutes are symmetrically distributed with the second joint as the center, and the threaded connectors are symmetrically distributed with the rubber protection columns as the center.

[0009] Through the above technical solutions, the number of installation chutes is set to several, which can facilitate the installation and disassembly of the limit snap ring, and can cooperate with the limit nut to fix and limit the limit snap ring.

[0010] As a further improvement of the above solution, the limit columns are symmetrically distributed with the connecting plate as the center, and the limit screw rod extends through the connecting plate to the inside of the first joint and the second joint.

[0011] As a further improvement of the above solution, a limit snap ring is slidably connected inside the second joint, the limit nuts are symmetrically distributed with the first joint as the center, and the limit snap rings are symmetrically distributed with the second joint as the center.

[0012] As a further improvement of the above solution, the limit columns are symmetrically distributed with the first joint as the center, the connecting plates are symmetrically distributed with the second joint as the center, and the limit screw rods are symmetrically distributed with the first joint as the center.

[0013] As a further improvement of the above solution, the rubber protection plates are symmetrically distributed with the metal bellows as the center, and the rubber protection columns are symmetrically distributed with the metal bellows as the center.

[0014] As a further improvement of the above solution, the rubber protection columns are located on the surface of the metal bellows, and the rubber protection plates are located on the surface of the metal bellows.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] When the utility model is removed from the surfaces of the limit snap ring and the threaded connector by rotating the limit nuts at both front and rear ends, the rubber protection columns are installed inside the first connector and the second connector, and then limited and fixed in cooperation with the limit snap ring and the limit nuts. By setting the limit screw rod to be rotated and removed from inside the first connector and the second connector, the connecting plate and the limit column are pulled to be removed from the surface of the rubber protection plate. By cooperating with the rubber protection plate and the rubber protection columns, effective protection can be provided for the internal metal corrugated pipe during use, increasing the service life of the metal corrugated pipe.

[0017] By setting the sliding connection between the installation chute and the limit snap ring, and the cooperation between the threaded connector and the limit nut in the utility model, during the installation and maintenance process, the positions of the components can be quickly positioned and adjusted, improving the installation efficiency and convenience. By setting the design that the limit screw rod penetrates through the connecting plate and extends into the connector, not only the mechanical strength of the connection is enhanced, but also the protection of the internal structure is increased through the setting of the limit column, improving the overall safety and adaptability. By setting the structure of the limit screw rod and the connecting plate, it is convenient to inspect and maintain the inside when needed, reducing the maintenance cost and time. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the side anatomical structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the rubber protection plate disassembly structure of the utility model;

[0021] Figure 4 It is an enlarged schematic diagram of the structure at position A of the utility model;

[0022] Figure 5 It is a schematic diagram of the right view structure of the utility model.

[0023] Main Symbol Description:

[0024] 1. Metal corrugated pipe; 2. First connector; 3. Second connector; 4. Installation chute; 5. Limit snap ring; 6. Limit nut; 7. Threaded connector; 8. Limit card slot; 9. Rubber protection plate; 10. Limit column; 11. Connecting plate; 12. Limit screw rod; 13. Rubber protection column. Detailed Embodiment

[0025] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0026] Embodiment:

[0027] Please refer to Figures 1-5 , the high-fatigue-life metal welded bellows of this embodiment includes a metal bellows 1, a first joint 2 is welded to the front end of the metal bellows 1, and a second joint 3 is welded to the rear end of the metal bellows 1;

[0028] An installation chute 4 is opened on the surface of the first joint 2, a limit snap ring 5 is slidably connected inside the installation chute 4, a threaded connector 7 is threadedly connected inside the first joint 2, a limit nut 6 is threadedly connected to the surface of the threaded connector 7, a rubber protection post 13 is fixedly connected to the surface of the threaded connector 7, a limit card slot 8 is opened inside the first joint 2, a rubber protection plate 9 is clamped inside the limit card slot 8, a limit screw 12 is threadedly connected inside the first joint 2, a connecting plate 11 is threadedly connected to the surface of the limit screw 12, and a limit post 10 is welded to the bottom end of the connecting plate 11. When the limit nuts 6 at both ends are rotated and removed from the surfaces of the limit snap ring 5 and the threaded connector 7, the rubber protection post 13 is installed inside the first joint 2 and the second joint 3, and then the limit snap ring 5 and the limit nut 6 are used for limiting and fixing. By setting the limit screw 12 to be rotated and removed from the inside of the first joint 2 and the second joint 3, the connecting plate 11 and the limit post 10 are pulled to be removed from the surface of the rubber protection plate 9. By cooperating with the rubber protection plate 9 and the rubber protection post 13, effective protection can be provided for the internal metal bellows 1 during use, increasing the service life of the metal bellows 1.

[0029] The installation chutes 4 are symmetrically distributed with the first joint 2 as the center, the installation chutes 4 are symmetrically distributed with the second joint 3 as the center, and the threaded connector 7 is symmetrically distributed with the rubber protection post 13 as the center.

[0030] The number of the installation chutes 4 is set to several, which can facilitate the installation and disassembly of the limit snap ring 5 and can cooperate with the limit nut 6 to fix and limit the limit snap ring 5.

[0031] The limit posts 10 are symmetrically distributed with the connecting plate 11 as the center, and the limit screw 12 penetrates through the connecting plate 11 and extends to the inside of the first joint 2 and the second joint 3.

[0032] A limit snap ring 5 is slidably connected inside the second joint 3, the limit nuts 6 are symmetrically distributed with the first joint 2 as the center, and the limit snap rings 5 are symmetrically distributed with the second joint 3 as the center.

[0033] The limiting posts 10 are symmetrically distributed around the first joint 2, the connecting plates 11 are symmetrically distributed around the second joint 3, and the limiting screw rods 12 are symmetrically distributed around the first joint 2. By providing the sliding connection between the installation chute 4 and the limiting snap ring 5, and the cooperation between the threaded connection head 7 and the limiting nut 6, during the installation and maintenance processes, the positions of the components can be quickly located and adjusted, improving the installation efficiency and convenience. Through the design of the limiting screw rod 12 passing through the connecting plate 11 and extending into the joint, not only the mechanical strength of the connection is enhanced, but also the protection of the internal structure is increased through the setting of the limiting posts 10, improving the overall safety and adaptability. By providing the structures of the limiting screw rod 12 and the connecting plate 11, it is convenient to inspect and maintain the interior when needed, reducing the maintenance cost and time.

[0034] The rubber guard plates 9 are symmetrically distributed around the metal bellows 1, and the rubber protection posts 13 are symmetrically distributed around the metal bellows 1.

[0035] The rubber protection posts 13 are located on the surface of the metal bellows 1, and the rubber guard plates 9 are located on the surface of the metal bellows 1.

[0036] The implementation principle of the high-fatigue-life metal welded bellows in the embodiment of this application is as follows: After placing the whole device in a suitable position, when the limiting nuts 6 at both front and rear ends are rotated and removed from the surfaces of the limiting snap ring 5 and the threaded connection head 7, the rubber protection posts 13 are installed into the interiors of the first joint 2 and the second joint 3, and then the limiting and fixing are carried out in cooperation with the limiting snap ring 5 and the limiting nut 6. By setting the limiting screw rod 12 to be rotated and removed from the interiors of the first joint 2 and the second joint 3, the connecting plate 11 and the limiting posts 10 are pulled to be removed from the surface of the rubber guard plate 9. Through the cooperation of the rubber guard plate 9 and the rubber protection posts 13, effective protection can be provided for the internal metal bellows 1 during use, increasing the service life of the metal bellows 1. By providing the sliding connection between the installation chute 4 and the limiting snap ring 5, and the cooperation between the threaded connection head 7 and the limiting nut 6, during the installation and maintenance processes, the positions of the components can be quickly located and adjusted, improving the installation efficiency and convenience. Through the design of the limiting screw rod 12 passing through the connecting plate 11 and extending into the joint, not only the mechanical strength of the connection is enhanced, but also the protection of the internal structure is increased through the setting of the limiting posts 10, improving the overall safety and adaptability. By providing the structures of the limiting screw rod 12 and the connecting plate 11, it is convenient to inspect and maintain the interior when needed, reducing the maintenance cost and time.

[0037] The above implementation manners are only the preferred implementation manners of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A high fatigue life metal welded bellows, comprising a metal bellows (1), a first joint (2) being welded to the front end of the metal bellows (1), and a second joint (3) being welded to the rear end of the metal bellows (1); It is characterized in that The surface of the first joint (2) is provided with a mounting groove (4), the interior of the mounting groove (4) is slidably connected to a limiting clamp ring (5), the interior of the first joint (2) is threadedly connected to a threaded connector (7), the surface of the threaded connector (7) is threadedly connected to a limiting nut (6), the surface of the threaded connector (7) is fixedly connected to a rubber protective column (13), the interior of the first joint (2) is provided with a limiting clamping groove (8), the interior of the limiting clamping groove (8) is clamped with a rubber protective plate (9), the interior of the first joint (2) is threadedly connected to a limiting screw (12), the surface of the limiting screw (12) is threadedly connected to a connecting plate (11), and a limiting column (10) is welded to the bottom end of the connecting plate (11).

2. The high fatigue life metal welded bellows according to claim 1, characterized in that: The installation slide groove (4) is symmetrically distributed with the first joint (2) as the center, the installation slide groove (4) is symmetrically distributed with the second joint (3) as the center, and the threaded connector (7) is symmetrically distributed with the rubber protective column (13) as the center.

3. The high fatigue life metal welded bellows according to claim 1, characterized in that: The limiting columns (10) are symmetrically distributed with the connecting plate (11) as the center, and the limiting screw rod (12) penetrates the connecting plate (11) and extends to the inside of the first joint (2) and the second joint (3).

4. The high fatigue life metal welded bellows according to claim 3, characterized in that: The second joint (3) is internally slidably connected to a limit snap ring (5); the limit nut (6) is symmetrically distributed around the first joint (2); and the limit snap ring (5) is symmetrically distributed around the second joint (3).

5. The high fatigue life metal welded bellows according to claim 1, characterized in that: The limiting columns (10) are symmetrically distributed with the first joint (2) as the center, the connecting plates (11) are symmetrically distributed with the second joint (3) as the center, and the limiting screws (12) are symmetrically distributed with the first joint (2) as the center.

6. The high fatigue life metal welded bellows according to claim 5, characterized in that: The rubber protective plates (9) are symmetrically distributed with the metal bellows (1) as the center, and the rubber protective columns (13) are symmetrically distributed with the metal bellows (1) as the center.

7. The high fatigue life metal welded bellows according to claim 6, characterized in that: The rubber protective column (13) is located on the surface of the metal bellows (1), and the rubber protective plate (9) is located on the surface of the metal bellows (1).

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