A stress relief device for a pipe elbow

Abstract

The utility model discloses a stress relieving device at the bend of pipeline belongs to the field of pipeline, and it is including: first fixed part, second fixed part, telescopic link, and convex, wherein first fixed part and second fixed part are used for fixing the pipe section of the both sides of the bend of elbow, telescopic link connects first fixed part and second fixed part, and the both ends of elastic cable are connected with first fixed part and second fixed part respectively, and the middle section of elastic cable is connected with convex, and the convex is configured to convert the elastic force of elastic cable into the kinetic energy of knocking the bend of pipeline. This embodiment fixes the both sides of the bend of pipeline through first fixed part and second fixed part, combines telescopic link and elastic cable, and converts the elastic force into the knocking kinetic energy by using convex, and dynamically disperses the stress concentration at the bend. Compared with the traditional manual hammering, the device provides uniform, controllable knocking force, avoids the damage of pipeline surface, improves the stress relief efficiency and consistency, and has simple structure, easy installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, specifically to a stress relief device at a pipeline bend. Background Technology

[0002] During pipe manufacturing, after pipes are bent into bends using a pipe bending machine, significant stress concentration often occurs at the bend due to material deformation and internal forces. This stress concentration can lead to pipe fatigue, cracking, or deformation, affecting the safety and service life of the pipeline system. In existing technologies, to alleviate stress concentration at bends, the bent section is typically manually struck with a hammer. This external impact redistributes the internal stress of the material, achieving a stress-relieving effect.

[0003] However, this method has significant drawbacks: manual hammering is inefficient, produces uneven force, and makes it difficult to ensure uniform and consistent stress relief. Furthermore, the process is time-consuming and labor-intensive, making it unsuitable for large-scale production. In addition, the hammering method lacks precise control, potentially damaging the pipe surface or introducing new stress points. In recent years, although some mechanized hammering devices or reinforcement structures have been proposed, their complex structures, inconvenient installation, and inability to dynamically adapt to stress changes in the pipe under different operating conditions are significant challenges. Moreover, manual hammering is insufficient for penetrating the interior of pipe bends. Therefore, there is an urgent need for a device that is simple in structure, highly efficient in operation, and can uniformly relieve stress concentration at pipe bends to improve pipe processing quality and operational safety. Utility Model Content

[0004] In view of the problems of fatigue and cracking caused by stress concentration after pipe bending in the prior art, the purpose of this utility model is to overcome the defects of traditional manual hammering, such as low efficiency, uneven force and possible damage to pipe. Therefore, this utility model provides a device that converts elastic force into hammering kinetic energy, dynamically and uniformly relieving stress concentration at pipe bends. Thus, this utility model provides a stress relief device for pipe bends.

[0005] Specifically, this utility model discloses a stress relief device at a pipe bend, comprising:

[0006] First and second fasteners are used to fix the pipe sections on both sides of the bend in the pipe.

[0007] A telescopic rod for connecting the first fixing member and the second fixing member;

[0008] An elastic cable, with its two ends connected to the first fixing member and the second fixing member, respectively;

[0009] A protrusion, connected to the middle section of the elastic cord, is configured to convert the elastic force of the elastic cord into kinetic energy that strikes the bend in the pipe.

[0010] Furthermore, the first and second fixing components have the same structure, both including a first arc-shaped component and a second arc-shaped component. The inner surfaces of the first and second arc-shaped components are fitted to the pipe, and the two ends of the first and second arc-shaped components are connected accordingly.

[0011] Furthermore, the elastic cable is connected to the ends of the first and second fasteners located inside the bend of the pipe.

[0012] Furthermore, both ends of the first arc-shaped member and the second arc-shaped member are provided with planar protrusions, and the protrusions of the first arc-shaped member and the second arc-shaped member abut against each other.

[0013] Furthermore, the first arc-shaped member and the second arc-shaped member are hinged together.

[0014] Furthermore, the protrusion at one end is provided with a screw hole, through which a bolt passes to connect the first arc-shaped component and the second arc-shaped component.

[0015] Furthermore, the protrusion at the other end is hinged.

[0016] Furthermore, the front end of the protrusion is a striking part, and the end face of the striking part is a convex curved surface.

[0017] Furthermore, the protrusion is generally spherical.

[0018] Furthermore, the elastic cord is provided with a pouch for securing the protrusion.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention uses a first and a second fixing member to secure both sides of the pipe bend. Combined with a telescopic rod and an elastic cable, the protrusions convert elastic force into impact kinetic energy, dynamically dispersing stress concentration at the bend. Compared to traditional manual hammering, this device provides a uniform and controllable impact force, avoids damage to the pipe surface, improves stress relief efficiency and consistency, and features a simple structure that is easy to install and maintain.

[0021] In this invention, the striking part at the front end of the protrusion adopts a convex curved surface design, which increases the contact area with the pipe, disperses the striking force, reduces damage to the pipe surface, and improves the uniformity of stress relief.

[0022] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0023] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0024] Figure 1 This is a three-dimensional schematic diagram of a stress relief device at a pipe bend in one or more embodiments of the present invention.

[0025] Figure 2 This is a top view schematic diagram of a stress relief device at a pipe bend in one or more embodiments of the present invention;

[0026] Figure 3 This is a front view schematic diagram of a stress relief device at a pipe bend in one or more embodiments of the present invention;

[0027] Figure 4 This is a right-side view of a stress relief device at a pipe bend in one or more embodiments of the present invention.

[0028] In the picture:

[0029] 11-First fixing component; 12-Second fixing component; 2-Elastic cable; 3-Protrusion; 4-Telescopic rod; 5-Bag; 101-First pipe section; 102-Second pipe section. Detailed Implementation

[0030] In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0031] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Please refer to Figures 1-4This utility model provides a stress relief device for pipe bends, aiming to uniformly alleviate stress concentration caused by bending processes at pipe bends through a simple structure and efficient operation. It includes: a first fixing member 11, a second fixing member 12, a telescopic rod 4, and a protrusion 3. The first fixing member 11 and the second fixing member 12 are used to fix the pipe sections on both sides of the bend. The telescopic rod 4 connects the first fixing member 11 and the second fixing member 12. The two ends of an elastic cable 2 are respectively connected to the first fixing member 11 and the second fixing member 12. The protrusion 3 is connected to the middle section of the elastic cable 2 and is configured to convert the elastic force of the elastic cable 2 into kinetic energy for striking the pipe bend. In this embodiment, the first fixing member 11 and the second fixing member 12 fix both sides of the pipe bend. Combined with the telescopic rod 4 and the elastic cable 2, the protrusion 3 converts the elastic force into striking kinetic energy, dynamically dispersing the stress concentration at the bend. Compared to traditional manual hammering, this device provides a uniform and controllable striking force, avoids damage to the pipe surface, improves stress relief efficiency and consistency, and has a simple structure that is easy to install and maintain.

[0033] According to one embodiment of this utility model, the first fixing member 11 and the second fixing member 12 are used to fix the pipe sections on both sides of the pipe bend, namely the first pipe section 101 and the second pipe section 102, to ensure that the device can be stably attached to the pipe during operation and prevent slippage or displacement. Figures 1-4 As shown, the first fixing member 11 and the second fixing member 12 have the same structural design, both consisting of a first arc-shaped member and a second arc-shaped member. Both the first and second arc-shaped members are semi-circular, designed to fit snugly against the outer surface of the pipe to ensure the fixing member can tightly wrap around the pipe, increasing the contact area and improving fixing stability. In another embodiment, the curvature of the first and second arc-shaped members is less than 180 degrees to accommodate pipes of different diameters.

[0034] According to one embodiment of this utility model, both ends of the first and second arc-shaped components have protrusions with flat surfaces for connecting the two arc-shaped components. One protrusion is connected by a hinge (not shown in the figure), allowing the first and second arc-shaped components to rotate relative to each other, facilitating installation and disassembly of the device. The other protrusion has a screw hole, through which a bolt is passed to lock the first and second arc-shaped components together, forming a complete annular fixing structure. This hinged and bolted connection method not only facilitates operation but also ensures that the fixing components firmly clamp the pipe, adapting to pipes of different diameters.

[0035] According to one embodiment of the present invention, the first fixing member 11 and the second fixing member 12 are provided with a connection point at their ends located inside the pipe bend for connecting the elastic cable 2. This design ensures that the elastic cable 2 can apply tension along the inside of the pipe bend, thereby effectively acting on the stress concentration area at the bend.

[0036] According to one embodiment of this utility model, the telescopic rod 4 is connected between the first fixing member 11 and the second fixing member 12, located on the outside of the pipe bend. Figure 3 and Figure 4 As shown, the main function of the telescopic rod 4 is to adjust the distance between the first fixing member 11 and the second fixing member 12 to accommodate different bending angles and pipe sizes. The telescopic rod 4 adopts a telescopic design, and its length can be adjusted, for example, through a sleeve-type structure or a threaded adjustment structure. The installation of the telescopic rod 4 not only enhances the overall stability of the device, but also provides a reverse support force for the tension of the elastic cable 2, so that the tension of the elastic cable 2 can be effectively converted into the striking kinetic energy of the protrusion 3. The material of the telescopic rod 4 can be selected from high-strength metal or engineering plastic to ensure its rigidity and durability under stress. The two ends of the telescopic rod 4 are connected to the outer sides of the first fixing member 11 and the second fixing member 12 by bolts or pins to ensure a firm installation and easy disassembly.

[0037] According to one embodiment of this utility model, the two ends of the elastic cable 2 are respectively connected to the inner ends of the first fixing member 11 and the second fixing member 12, forming an elastic connection in a stretched state. Figure 1 As shown, the elastic cable 2 is arranged along the inside of the pipe bend. Its material can be high-elasticity rubber, polyurethane elastic rope, or other materials with good elasticity and fatigue resistance. The main function of the elastic cable 2 is to generate tension through its elastic deformation, providing striking kinetic energy for the protrusion 3.

[0038] According to one embodiment of the present invention, the protrusion 3 is connected to the middle section of the elastic cord 2 and is typically fixed by a pouch 5. The protrusion 3 is configured to convert the elastic force of the elastic cord 2 into kinetic energy that strikes a bend in the pipe. Figures 2-4 As shown, the front end of protrusion 3 is a striking part, and the end face of the striking part is designed as a convex curved surface to increase the contact area with the pipe surface, disperse the striking force, and reduce local damage to the pipe surface. Protrusion 3 can be spherical or nearly spherical in shape to ensure that it can flexibly adapt to the curvature changes of the pipe bend during the striking process, while reducing the risk of stress concentration.

[0039] According to one embodiment of this utility model, the pouch 5 is used to fix the protrusion 3 to the middle section of the elastic cord 2. Its material can be wear-resistant fabric or flexible plastic, ensuring that the protrusion 3 remains stably positioned during the stretching and releasing of the elastic cord 2. The pouch 5 is connected to the elastic cord 2 by means of sewing, bonding, or mechanical fixation. Its structural design must ensure that the striking part of the protrusion 3 can freely contact the surface of the pipe.

[0040] According to one or more embodiments of this utility model, the working principle of the device is based on the conversion of elastic force into kinetic energy and the dispersion effect of dynamic impact on pipe stress. The specific working process is as follows: First, the first fixing member 11 and the second fixing member 12 are respectively installed on the first pipe section 101 and the second pipe section 102 on both sides of the pipe bend. By opening the hinge end, the first arc-shaped member and the second arc-shaped member are fitted onto the pipe, and then the protrusion at the other end is locked with bolts to make the fixing member firmly clamp the pipe. The length of the telescopic rod 4 is adjusted to connect the first fixing member 11 and the second fixing member 12 and maintain appropriate tension. The two ends of the elastic cable 2 are connected to the inner ends of the first fixing member 11 and the second fixing member 12, and are initially in a stretched state. The degree of stretching of the elastic cable 2 can be finely adjusted by adjusting the length of the telescopic rod 4 to ensure appropriate elastic force. When the device is started, the tension of the elastic cable 2 drives the protrusion 3 to periodically strike along the inner surface of the pipe bend. The striking part of the protrusion 3 contacts the pipe surface with a convex curved surface, generating a uniform striking force. This impact force is transmitted through the pipe material to the interior, causing a redistribution of stress within the material, thereby alleviating stress concentration at bends.

[0041] It should be noted that, due to the elasticity of the elastic cable 2, the striking action of the protrusion 3 can dynamically adapt to the stress changes of the pipeline under different operating conditions. For example, when the pipeline is affected by external loads or temperature changes, the tension of the elastic cable 2 will automatically adjust to maintain the stability of the striking force.

[0042] According to one or more embodiments of this utility model, through the cooperation of the elastic cord 2 and the protrusion 3, the device can provide a uniform and controllable striking force, which significantly improves the efficiency and consistency of stress relief compared to traditional manual hammering. The curved striking part design of the protrusion 3 further disperses the striking force and avoids localized damage to the pipe surface.

[0043] This device is suitable for various pipeline systems requiring pipe bending. In pipeline production lines, it can be integrated as part of the automation equipment into the downstream section of the pipe bending machine, providing real-time stress relief during bends and improving production efficiency. For pipelines operating in high-temperature and high-pressure environments, this device can effectively alleviate stress concentration caused by temperature changes or pressure fluctuations through dynamic impact. For pipeline systems with multi-angle or complex bends, the adjustable function of the telescopic rod 4 and the adaptability of the elastic cable 2 enable it to flexibly handle bends of different geometries.

[0044] This utility model's stress relief device for pipe bends achieves efficient and uniform relief of stress concentration at pipe bends through the synergistic action of the first fixing component 11, the second fixing component 12, the telescopic rod 4, the elastic cable 2, and the protrusion 3. The device has a simple structure, is easy to install and maintain, and can dynamically adapt to stress changes under different working conditions, significantly improving pipe processing quality and operational safety. Compared with traditional manual hammering, this device has significant advantages in efficiency, consistency, and pipe protection, and is suitable for various industrial pipeline applications.

[0045] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A stress relief device for pipe bends, characterized in that, include: First and second fasteners are used to fix the pipe sections on both sides of the bend in the pipe. A telescopic rod for connecting the first fixing member and the second fixing member; An elastic cable, with its two ends connected to the first fixing member and the second fixing member, respectively; A protrusion, connected to the middle section of the elastic cord, is configured to convert the elastic force of the elastic cord into kinetic energy that strikes the bend in the pipe.

2. The stress relief device at a pipe bend according to claim 1, characterized in that, The first and second fixing components have the same structure, both including a first arc-shaped component and a second arc-shaped component. The inner surfaces of the first and second arc-shaped components are attached to the pipe, and the two ends of the first and second arc-shaped components are connected accordingly.

3. The stress relief device at a pipe bend according to claim 2, characterized in that, The elastic cable is connected to the ends of the first and second fixing members located inside the bend of the pipe.

4. A stress relief device for a pipe bend according to claim 2, characterized in that, Both ends of the first arc-shaped member and the second arc-shaped member are provided with protrusions with flat surfaces, and the protrusions of the first arc-shaped member and the second arc-shaped member abut against each other.

5. A stress relief device for a pipe bend according to claim 4, characterized in that, The first arc-shaped component and the second arc-shaped component are hinged together.

6. A stress relief device for a pipe bend according to claim 4 or 5, characterized in that, The protrusion at one end is provided with a screw hole, through which a bolt passes to connect the first arc-shaped part and the second arc-shaped part.

7. A stress relief device for pipe bends as described in claim 6, characterized in that, The protrusion at the other end is hinged.

8. A stress relief device for pipe bends as described in claim 1, characterized in that, The front end of the protrusion is a striking part, and the end face of the striking part is a convex curved surface.

9. A stress relief device for a pipe bend according to claim 8, characterized in that, The protrusion is spherical in shape.

10. A stress relief device for a pipe bend according to claim 1, characterized in that, The elastic cord is provided with a pouch for securing the protrusion.

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