Corrugated expansion joint with limiting function

Abstract

The utility model provides a corrugated expansion joint with a limiting function, and belongs to the technical field of corrugated pipes. The two connecting flanges located at the two ends of the middle corrugated pipe are provided with the extending limiting parts, the limiting parts are provided with the limiting holes, the two ends of the adjusting rod are arranged in the two corresponding limiting holes in the two connecting flanges in a penetrating mode respectively, and the limiting parts are limited to the adjusting rod through the adjusting pieces. The two connecting flanges are limited and loosened through the position change of the adjusting piece on the adjusting rod, temporary fixing of the total length and limiting of the states of the connecting flanges are achieved, the pipeline can be rapidly aligned and connected, adjustment is not needed, operation is more convenient, and meanwhile the working efficiency is improved. After installation is completed, the movement stroke range can be provided for the limiting part through movement of the adjusting piece, so that the total telescopic range of the sleeve corrugated telescopic joint is limited, the problem of damage caused by unlimited telescopic is avoided, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, specifically to a corrugated expansion joint with limiting function. Background Technology

[0002] Corrugated pipes, a commonly used structure in piping systems, can expand and contract in length and adjust in direction within permissible limits. Therefore, they are suitable for applications with limited space and varying connection strokes and directions. For example, when a piping system expands or cools due to heat, it needs to accommodate deformation. In this case, a corrugated expansion joint is installed in the pipeline. Its main body is a corrugated pipe with connecting flanges at both ends. The expansion, contraction, and bending of the corrugated pipe adjust the distance and relative direction between the two connecting flanges. In other words, the expansion and contraction deformation of the corrugated expansion joint provides space for the deformation of the entire pipeline. Its flexible structure and good adaptability have made it popular in the market.

[0003] Currently, the structure of existing corrugated expansion joints on the market, such as the flexible joint with filter screen disclosed in patent CN215950689U, has a metal hose body, and a first loose flange joint is connected to one end of the metal hose body. A second loose flange joint is connected to the end of the metal hose body away from the first loose flange joint. Furthermore, both the first and second loose flange joints have a movable groove at the end away from the metal hose, and a sealing ring is provided in the movable groove. Six sets of mounting holes are equally spaced in a ring on both the first and second loose flange joints. The metal hose body includes a corrugated pipe and a mesh sleeve. As can be seen, the existing corrugated expansion joints are only connected by a metal flexible hose body between the two flange joints. During installation, the initial length and the arrangement direction of the two flange joints are random, which leads to problems such as the length being too long or too short during pipeline connection. It is necessary to use tools to stretch or compress it by hand. In addition, it is necessary to adjust the two flange joints to a coaxial state in real time. This has the disadvantages of inconvenience, time and labor. Its expansion length is only affected by the environment, that is, its expansion and contraction are unrestricted. This weakens its restriction effect on the connected pipeline, thus making the pipeline susceptible to damage from unlimited expansion and contraction, and affecting its service life. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, this invention aims to provide a corrugated expansion joint with limiting features. Both connecting flanges have protruding limiting portions along their edges, each with a limiting hole. An adjusting rod passes between the limiting holes on the corresponding limiting portions of the two connecting flanges. Adjusting elements are located on both sides of each limiting portion on the adjusting rod. During installation, the positions of the two limiting portions can be temporarily fixed by moving the adjusting elements on the adjusting rod, ensuring the overall length remains stable and the two connecting flanges are coaxial. This eliminates the need for manual stretching, compression, and alignment of the corrugated expansion joint using tools, meeting the requirements for rapid connection. The operation is convenient, time-saving, and labor-saving. Furthermore, after installation, the position of the adjusting elements on both sides of the limiting portions can be adjusted to limit the travel of the limiting portions, thus restricting the expansion range and preventing damage from unrestricted expansion, thereby extending the service life.

[0005] The specific technical solution is as follows:

[0006] A corrugated expansion joint with limiting features includes a central corrugated pipe and two connecting flanges, with the two connecting flanges respectively disposed at both ends of the central corrugated pipe. It further includes several adjusting rods and adjusting elements mounted on each adjusting rod. Each connecting flange has an extending limiting portion along its edge, and each limiting portion has a limiting hole. One end of the adjusting element passes through the limiting hole of the limiting portion of one connecting flange, and the other end of the adjusting rod passes through the corresponding limiting hole of the limiting portion of the other connecting flange. Simultaneously, adjusting elements are provided on both sides of each limiting portion on the adjusting rod.

[0007] In the aforementioned corrugated expansion joint with limiting, the adjusting rod is a screw and the adjusting component is a nut.

[0008] In the aforementioned corrugated expansion joint with limiting, each adjusting member includes two nuts, which are stacked on top of each other.

[0009] In the aforementioned corrugated expansion joint with a limiting mechanism, the limiting part and the connecting flange are integrally formed.

[0010] In the aforementioned corrugated expansion joint with limiting, each connecting flange is provided with multiple limiting parts, and the multiple limiting parts are distributed in a ring array with the axis of the connecting flange as the axis.

[0011] In the aforementioned corrugated expansion joint with limiting, before installation, the adjusting parts on both sides of each limiting part are respectively tightly attached to the two side walls of the corresponding limiting part.

[0012] In the aforementioned corrugated expansion joint with limiting, after installation, the adjusting members on both sides of each limiting part are spaced apart from the side walls of the corresponding limiting part; or one of the adjusting members on both sides of each limiting part is spaced apart from one side wall of the corresponding limiting part, and the other adjusting member is in close contact with the other side wall of the corresponding limiting part.

[0013] In the aforementioned corrugated expansion joint with a limiting feature, the limiting portion extends radially along the connecting flange, and the limiting hole on the limiting portion is located between two adjacent mounting holes on the connecting flange.

[0014] The aforementioned corrugated expansion joint with limiting includes a cover, which is disposed on one side of the two connecting flanges facing away from each other. Each cover has a connecting part on its edge that mates with the limiting part on the corresponding connecting flange. The connecting part has a connecting hole. The adjusting rod passes through the limiting hole and then simultaneously passes through the connecting hole, and the adjusting member simultaneously abuts against the connecting part.

[0015] The aforementioned corrugated expansion joint with limiting includes a jacket, which comprises an intermediate jacket and end jackets. The intermediate jacket is a cylindrical structure with a notch along its axial direction. The notch connects the inner and outer walls of the intermediate jacket and also extends through both ends of the intermediate jacket. The intermediate jacket is inserted into the two adjusting members between the two connecting flanges through the notch. The end jackets are arranged in a cap shape and are fitted onto both ends of the adjusting rod. Each end jacket is provided with a hook extending along the axial direction of the adjusting rod, with one end of the hook hooking onto the edge of the corresponding connecting flange.

[0016] The positive effects of the above technical solution are:

[0017] The aforementioned corrugated expansion joint with limiting features has extending limiting portions on the edges of the connecting flanges at both ends of the central corrugated pipe, with limiting holes on these portions. An adjusting rod has its two ends inserted into the corresponding limiting holes on the two connecting flanges. Furthermore, adjusting elements are provided on both sides of each limiting portion on the adjusting rod. By changing the position of these adjusting elements on the adjusting rod, the limiting portion is restricted to a specific position on the adjusting rod or its travel is limited. This allows for temporary fixation of the two limiting portions in the initial state, ensuring the overall length of the corrugated expansion joint remains stable and the two connecting flanges are coaxial. This eliminates the need for manual stretching, compression, and alignment of the corrugated expansion joint using tools, meeting the requirements for rapid connection. Operation is more convenient. After installation, the travel of the limiting portions can be limited by adjusting the positions of the adjusting elements on both sides of the limiting portion, thereby limiting the total expansion range of the corrugated expansion joint, preventing damage caused by unrestricted expansion and contraction, and extending its service life. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of the corrugated expansion joint with limiting according to the present invention;

[0019] Figure 2 This is a structural diagram of a corrugated expansion joint with a limit switch, featuring a cover and a jacket, according to the present invention.

[0020] In the attached diagram: 1. Intermediate bellows; 2. Connecting flange; 21. Limiting part; 22. Limiting hole; 23. Mounting hole; 3. Adjusting rod; 4. Adjusting component; 5. Cover; 51. Connecting part; 52. Connecting hole; 6. Jacket; 61. Intermediate jacket; 62. End jacket; 611. Notch; 621. Hook. Detailed Implementation

[0021] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 2 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0022] Figure 1 This is a structural diagram of an embodiment of the corrugated expansion joint with limiting function according to this utility model. Figure 1 As shown, the corrugated expansion joint with limit provided in this embodiment includes: a middle corrugated pipe 1 and two connecting flanges 2. At this time, the two connecting flanges 2 are respectively set at both ends of the middle corrugated pipe 1. Preferably, the two ends of the middle corrugated pipe 1 are welded to the corresponding connecting flanges 2 to improve the connection reliability and sealing performance. In addition, each connecting flange 2 is provided with several evenly distributed mounting holes 23 to meet the pipeline connection requirements.

[0023] Specifically, several adjusting rods 3 and adjusting components 4 installed on each adjusting rod 3 are provided between the two connecting flanges 2. At this time, each connecting flange 2 has an extended limiting portion 21 on its edge, which expands the side area of ​​the connecting flange 2, providing conditions for the mating installation of the adjusting rods 3 and adjusting components 4. Each limiting portion 21 has a limiting hole 22, providing conditions for subsequent use with the adjusting component 4 through the limiting hole 22. Furthermore, one end of the adjusting component 4 is inserted into the limiting hole 22 of the limiting portion 21 of one connecting flange 2, and the other end of the adjusting rod 3 is inserted into the corresponding limiting hole 22 of the limiting portion 21 on the other connecting flange 2. That is, the two ends of the adjusting rod 3 connect the two corresponding limiting portions 21 respectively, thus limiting the total length and the direction and state of the connecting flange 2 during installation, facilitating installation and connection. After connection, the displacement stroke of the connecting flange 2 can be limited by the adjusting rod 3, thereby limiting the total expansion and contraction range of the bellows expansion joint and avoiding damage caused by unrestricted expansion and contraction. Meanwhile, an adjusting member 4 is provided on both sides of the adjusting rod 3 and each limiting part 21. The limiting part 21 is restricted to the adjusting rod 3 or provided with a range of movement by moving the adjusting member 4 on the adjusting rod 3, so as to meet different usage needs. The structure is simple, flexible and easy to use.

[0024] More specifically, the adjusting rod 3 used to connect the corresponding two limiting parts 21 is a screw, and the adjusting part 4 on the adjusting rod 3 is a nut. That is, the position of the rod on the screw can be adjusted by turning the nut, which makes the operation more convenient and the connection more reliable and stable.

[0025] More specifically, each adjusting component 4 includes two stacked nuts, meaning each adjusting component 4 has a double-nut structure, which provides better locking stability, prevents loosening, and increases the connection area with the screw, resulting in higher limiting stability and reliability.

[0026] More specifically, the limiting part 21 and the connecting flange 2 are set as an integral structure, that is, the limiting part 21 and the connecting flange 2 are a whole, which has higher structural strength and better load-bearing capacity. Compared with connection methods such as welding, the load-bearing capacity is stronger, which meets the needs of temporary fixing and subsequent positioning.

[0027] More specifically, each connecting flange 2 is provided with multiple limiting parts 21 to achieve multi-directional restriction of the connecting flange 2 and improve the restriction effect. Furthermore, the multiple limiting parts 21 are arranged in a circular array with the axis of the connecting flange 2 as the center. Preferably, each connecting flange 2 is provided with three limiting parts 21, and the three limiting parts 21 are arranged in an equilateral triangle, so that the connecting flange 2 is subjected to triangular force, the force is more even, and it is more stable after being restricted by the three adjusting rods 3 and the corresponding adjusting parts 4.

[0028] More specifically, before installing the corrugated expansion joint with limiters onto the pipeline, the adjusting members 4 on both sides of each limiting part 21 are tightly attached to the side walls of the corresponding limiting part 21. That is, the limiting part 21 is temporarily restricted to a specific position on the adjusting rod 3 by the adjusting members 4, thereby limiting the total length of the corrugated expansion joint and the direction and state of the connecting flange 2. This meets the usage requirements for quick connection with the pipeline and avoids the problem that the existing total length and the direction and state of the connecting flange 2 are too random, requiring manual stretching, compression and straightening operations with tools. The operation is convenient, time-saving and labor-saving.

[0029] More specifically, after installing the corrugated expansion joint with limits on the pipeline, the adjusting members 4 on both sides of each limiting part 21 are spaced apart from the corresponding side walls of the limiting part 21. This allows the limiting part 21 to move between its corresponding adjusting members 4, setting the range of movement for the limiting part 21. This avoids damage caused by unrestricted expansion and contraction of the pipeline during use, extending its service life. Alternatively, one adjusting member 4 on each side of each limiting part 21 can be spaced apart from one side wall of the corresponding limiting part 21, while the other adjusting member 4 is in close contact with the other side wall of the corresponding limiting part 21. This not only limits the total range of movement of the limiting part 21 but also restricts the direction of movement, allowing only subsequent stretching or retraction. This provides greater structural flexibility and meets different usage requirements.

[0030] More specifically, the limiting part 21 extends radially along the connecting flange 2, so that the limiting part 21 is far away from the original mounting hole 23 on the connecting flange 2, and will not interfere with the connection of the mounting hole 23 on the connecting flange 2 itself, thus meeting normal assembly requirements. At the same time, the limiting hole 22 on the limiting part 21 is located between two adjacent mounting holes 23 on the connecting flange 2, which not only avoids the impact on the subsequent connection of the mounting hole 23, but also minimizes the distance between it and the center of the connecting flange 2, reducing the protruding length and the overall volume.

[0031] Figure 2 This is a structural diagram of a corrugated expansion joint with a limiting feature, featuring a cap and a jacket, according to the present invention. Figure 1 and Figure 2As shown, both ends of the corrugated expansion joint with limiters are also equipped with caps 5. In this case, the caps 5 are placed on the opposite side of the two connecting flanges 2, that is, one connecting flange 2 corresponds to one cap 5. The caps 5 cover the center hole of the corresponding connecting flange 2, preventing external impurities from entering the interior of the corrugated expansion joint during storage or transportation, thus improving the external protection effect. In addition, each cap 5 has a connecting part 51 on its edge that cooperates with the limit part 21 on the corresponding connecting flange 2. The connecting part 51 has a connecting hole 52, so that the outer contour shape of the cap 5 is similar to the outer contour of the overall structure of the connecting flange 2 with the limit part 21. Furthermore, after the adjusting rod 3 passes through the limit hole 22, it simultaneously passes through the connecting hole 52, and the adjusting member 4 simultaneously abuts against the connecting part 51. That is, the original adjusting rod 3 and adjusting member 4 are fully utilized to install the cap 5 onto the corrugated expansion joint, eliminating the need for additional assembly structures and reducing manufacturing costs.

[0032] More specifically, the adjusting rod 3 is also provided with a sleeve 6. The sleeve 6 includes an intermediate sleeve 61 and an end sleeve 62. The intermediate sleeve 61 has a cylindrical structure, allowing it to be fitted over the adjusting rod 3. A notch 611 is formed along the axial direction of the intermediate sleeve 61, connecting its inner and outer walls and extending through both ends. This allows the sleeve 6 to be fitted over the adjusting rod 3 from the side via the notch 611, eliminating the need to disassemble the adjusting component 4 and simplifying operation. Furthermore, by positioning the intermediate sleeve 61 between the two adjusting components 4 and the two connecting flanges 2, and after installation and adjustment of the adjusting components 4, the intermediate sleeve 61 can be fitted between the two adjusting components 4 to restrict their subsequent movement, improving the stability of the adjusting components 4 when used as a limiting structure on the adjusting rod 3. Furthermore, the end sleeves 62 are arranged in a cap shape. When the end sleeves 62 are fitted onto both ends of the adjusting rod 3, they form a limiting position at the end of the adjusting rod 3, thereby reinforcing the limiting of the adjusting component 4 during subsequent use and preventing movement of the adjusting component 4 itself. Additionally, each end sleeve 62 is provided with a hook 621 extending axially along the adjusting rod 3. One end of the hook 621 is hooked onto the edge of the corresponding connecting flange 2. By hooking the edge of the connecting flange 2 with the hook 621, the end sleeve 62 can be effectively prevented from detaching from the end of the adjusting rod 3, improving installation stability. Preferably, the edge of the connecting flange 2 is provided with a recessed hanging hole, and the end of the hook 621 is hooked into the hanging hole, preventing the hook 621 from detaching during use, resulting in higher stability and reliability, and reducing the likelihood of accidental detachment of the end sleeve 62. It is worth noting that the intermediate sleeve 61 can be made of plastic and can be cut to an appropriate length according to usage requirements, improving adaptability.

[0033] The corrugated expansion joint with limiting provided in this embodiment includes a central corrugated pipe 1 and two connecting flanges 2. Extending limiting portions 21 are provided on both connecting flanges 2 at both ends of the central corrugated pipe 1, and limiting holes 22 are formed on the limiting portions 21. The two ends of an adjusting rod 3 are respectively inserted into the corresponding limiting holes 22 on the two connecting flanges 2. An adjusting member 4 restricts the limiting portions 21 onto the adjusting rod 3. The position of the adjusting member 4 on the adjusting rod 3 controls the restriction and relaxation of the two connecting flanges 2, achieving temporary fixation of the total length and limitation of the state of the connecting flanges 2. This allows for quick alignment and connection of the pipeline without adjustment, making operation more convenient. Furthermore, after installation, the movement of the adjusting member 4 provides a range of motion for the limiting portions 21, thereby limiting the total expansion and contraction range of the corrugated expansion joint, avoiding damage caused by unrestricted expansion and contraction, and extending its service life.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrugated expansion joint with limiting function, comprising an intermediate corrugated pipe and two connecting flanges, wherein the two connecting flanges are respectively disposed at both ends of the intermediate corrugated pipe, characterized in that, Also includes: The system includes several adjusting rods and adjusting members mounted on each adjusting rod. Each connecting flange has an extended limiting portion on its edge, and each limiting portion has a limiting hole. One end of the adjusting member passes through the limiting hole of the limiting portion of one connecting flange, and the other end of the adjusting rod passes through the limiting hole of the corresponding limiting portion of another connecting flange. Additionally, adjusting members are provided on both sides of each limiting portion on the adjusting rod.

2. The corrugated expansion joint with limiting function according to claim 1, characterized in that, The adjusting rod is a screw, and the adjusting component is a nut.

3. The corrugated expansion joint with limiting according to claim 2, characterized in that, Each of the aforementioned adjusting components includes two aforementioned nuts, and the two aforementioned nuts are stacked.

4. The corrugated expansion joint with limiting according to claim 1, characterized in that, The limiting part and the connecting flange are an integral structure.

5. The corrugated expansion joint with limiting according to claim 1, characterized in that, Each of the connecting flanges is provided with multiple limiting parts, and the multiple limiting parts are arranged in a ring array with the axis of the connecting flange as the axis.

6. The corrugated expansion joint with limiting according to claim 1, characterized in that, Before installation, the adjusting members on both sides of each limiting part are respectively tightly attached to the two side walls of the corresponding limiting part.

7. The corrugated expansion joint with limiting according to claim 1, characterized in that, After installation, the adjusting members on both sides of each limiting part are spaced apart from the side walls of the corresponding limiting part; or one of the adjusting members on both sides of each limiting part is spaced apart from one side wall of the corresponding limiting part, and the other adjusting member is in close contact with the other side wall of the corresponding limiting part.

8. The corrugated expansion joint with limiting according to claim 1, characterized in that, The limiting portion extends radially along the connecting flange, and the limiting hole on the limiting portion is located between two adjacent mounting holes on the connecting flange.

9. The corrugated expansion joint with limiting according to claim 1, characterized in that, It also includes a cover, which is disposed on the opposite side of the two connecting flanges. Each cover has a connecting part on its edge that mates with the limiting part on the corresponding connecting flange. The connecting part has a connecting hole. The adjusting rod passes through the limiting hole and then simultaneously passes through the connecting hole. The adjusting member simultaneously abuts against the connecting part.

10. The corrugated expansion joint with limiting according to claim 1, characterized in that, It also includes a jacket, which includes an intermediate jacket and end jackets. The intermediate jacket is a cylindrical structure with a notch along its axial direction. The notch connects the inner and outer walls of the intermediate jacket and also extends through both ends of the intermediate jacket. The intermediate jacket is inserted into the two adjusting members between the two connecting flanges through the notch. The end jackets are arranged in a cap shape and are sleeved on both ends of the adjusting rod. Each end jacket is provided with a hook extending along the axial direction of the adjusting rod, and one end of the hook hooks onto the edge of the corresponding connecting flange.

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