Device for bending large-diameter U-shaped heat exchange tube
By designing a device that includes a hydraulic system and a support structure, the deformation and error problems of U-shaped heat exchange tubes with large bending radii during the bending process were solved, realizing an efficient and low-cost bending process and improving the quality and production efficiency of heat exchange tubes.
Patent Information
- Application Number
- CN202423187479.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-24
AI Technical Summary
During the bending process of U-shaped heat exchange tubes with large bending radii, problems such as bending deformation, residual stress, wall thickness variation, and out-of-roundness deviation exist, which affect the performance and service life of the heat exchange tubes.
A device comprising a housing, a hydraulic fastening device, a clamping device, a limiting device, a rotary table, a bending die, a positioning block, a support component, and a balance frame is used. The clamping and bending process is controlled by a hydraulic system, and the bending radius and angle are optimized by combining the limiting and supporting structures. A speed reducer is used to adjust the rotation speed to ensure bending quality.
It improves the bending quality and efficiency of large-diameter U-shaped heat exchange tubes, reduces bending errors between multiple heat exchange tubes, optimizes the process flow, reduces production costs, and improves production efficiency.
Smart Images
Figure CN223543808U_ABST
Abstract
Description
Technical Field
[0001] This application generally relates to the technical field of U-shaped heat exchanger tube manufacturing, and more particularly to an apparatus for bending large-diameter U-shaped heat exchanger tubes. Background Technology
[0002] Currently, in the field of heat exchanger tube manufacturing, U-shaped heat exchanger tubes are widely used in industries such as petrochemicals, thermal power, and nuclear power due to their unique structure and superior performance. With the continuous development of industrial technology, the demand for U-shaped heat exchanger tubes with large bending radii is increasing. However, many technical challenges exist in the bending process of U-shaped heat exchanger tubes with large bending radii, such as bending deformation, residual stress, wall thickness variations, and roundness deviations. These problems seriously affect the performance and service life of the heat exchanger tubes. Therefore, for the above reasons, researching and developing a new device for bending large-diameter U-shaped heat exchanger tubes is of great significance for improving the bending quality of heat exchanger tubes, optimizing the process flow, and reducing production costs. Utility Model Content
[0003] In view of the above-mentioned technical problems, this disclosure proposes an apparatus for bending large-diameter U-shaped heat exchange tubes, characterized in that it includes: a housing, with a hydraulic fastening device disposed above one end of the housing; a hydraulic station placed inside the housing and connected to the hydraulic fastening device; a clamping device fixed together with the hydraulic fastening device, enabling the hydraulic fastening device to drive the clamping device to move back and forth to clamp and release the U-shaped heat exchange tube; and a limiting device placed on one side of the clamping device for controlling the bending of the U-shaped heat exchange tube. The clamping device has a limited travel range; a rotary table is positioned above the other end of the housing; a bending die is arranged around and fixed to the rotary table for adjusting the bending radius of the U-shaped heat exchange tube; a positioning block is arranged on one side of the clamping device; a first support member is arranged below the positioning block and the clamping device for supporting the positioning block and the clamping device; and a balance frame is fixed to the rotary table by fasteners to support the U-shaped heat exchange tube.
[0004] In a preferred embodiment, a speed reducer is provided below the rotary table, and the rotary table is rotated by the speed reducer.
[0005] In a preferred embodiment, two grooves are provided on one side of the positioning block to simultaneously accommodate and support two U-shaped heat exchange tubes during bending.
[0006] In a preferred embodiment, the two grooves are identical in shape and size and are spaced apart.
[0007] In a preferred embodiment, the two grooves are different in shape and size and are separated by a certain distance.
[0008] In a preferred embodiment, the fasteners are bolts and nuts.
[0009] In a preferred embodiment, a cloth strip is provided between the U-shaped heat exchange tube and the bending die to prevent the U-shaped heat exchange tube and the bending die from direct contact.
[0010] In a preferred embodiment, a second support member and a third support member are provided on both sides of the turntable. The second support member and the third support member are fixed above the housing, and a first limiting member and a second limiting member are respectively provided above the second support member and the third support member to limit the rotation angle of the turntable.
[0011] In a preferred embodiment, the first limiting member and the second limiting member are fixed to the second support member and the third support member by a connecting member.
[0012] Compared with the prior art, the beneficial effects of this disclosure are as follows: the technical solution of this utility model improves the bending quality and efficiency of large-diameter U-shaped heat exchange tubes, and can process multiple heat exchange tubes at one time, while reducing bending errors between multiple heat exchange tubes, and also optimizes the process flow and reduces production costs. Attached Figure Description
[0013] The novel features of this application are specifically set forth in the appended claims. A better understanding of the features and advantages of this application will be gained by referring to the following detailed description and accompanying drawings, which illustrate illustrative embodiments in which the principles of this application are utilized. The drawings are for illustrative purposes only and should not be considered as limiting the scope of this application. Furthermore, the same reference numerals denote the same elements throughout the drawings, in which:
[0014] Figure 1 A schematic diagram of an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown;
[0015] Figure 2 A schematic diagram of a hydraulic station for a device for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown.
[0016] Figure 3 A schematic diagram of a clamping device for bending a large-diameter U-shaped heat exchange tube according to an exemplary embodiment of the present disclosure is shown.
[0017] Figure 4A cross-sectional view of a positioning block of an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown; and;
[0018] Figure 5 A schematic diagram of multiple support members of an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown.
[0019] Explanation of reference numerals in the attached drawings: 1-box body, 2-limiting device, 3-hydraulic fastening device, 4-clamping device, 5-positioning block, 6-turntable, 7-balance frame, 8-reducer, 9-first support component, 10-second support component, 11-hydraulic station, 12-bending mold, 13-third support component, 14-fourth support component, 15-wheel. Detailed Implementation
[0020] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this disclosure and to fully convey the scope of this disclosure to those skilled in the art. Nothing in the following detailed description is intended to suggest that any particular component or feature is essential to this application. Those skilled in the art will understand that various features may be substituted for or combined with each other without departing from the scope of this disclosure.
[0021] Figure 1A schematic diagram of an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown. An apparatus for bending large-diameter U-shaped heat exchange tubes may include: a housing 1, a limiting device 2, a hydraulic fastening device 3, a clamping device 4, a positioning block 5, a rotary table 6, a balancing frame 7, a reducer 8, a first support member 9, a second support member 10, a hydraulic station 11, a bending die 12, a third support member 13, a fourth support member 14, and wheels 15. The hydraulic fastening device 3 may be disposed above one end of the housing 1. The hydraulic station 11 may be placed inside the housing 1 and connected to the hydraulic fastening device 3. The clamping device 4 may be fixed together with the hydraulic fastening device 3, allowing the hydraulic fastening device 3 to drive the clamping device 4 to move back and forth to clamp and release the U-shaped heat exchange tube. The limiting device 2 may be placed on one side of the clamping device 4 to limit the travel of the clamping device 4. The rotary table 6 may be disposed above the other end of the housing 1. The bending die 12 can be arranged around the rotary table 6 and fixed together with the rotary table 6 to adjust the bending radius of the U-shaped heat exchange tube. In some embodiments, bending dies 12 of different specifications can be installed on the rotary table 6 to achieve the purpose of bending U-shaped heat exchange tubes of different radii. In a preferred embodiment, a speed reducer 8 can be provided below the rotary table 6. The speed reducer 8 can drive the rotary table 6 to rotate. In some embodiments, the speed reducer 8 can be a planetary speed reducer, a gear speed reducer, a worm gear speed reducer, or any speed reducer that a person skilled in the art deems suitable. The positioning block 5 can be arranged on one side of the clamping device 4. In a preferred embodiment, two grooves can be provided on one side of the positioning block 5 to simultaneously accommodate and support two U-shaped heat exchange tubes during bending. In a preferred embodiment, the two grooves can be the same in shape and size and are spaced apart by a certain distance. In other embodiments, the two grooves can be different in shape and size and are spaced apart by a certain distance. The shape of the grooves is preferably circular. The first support member 9 can be arranged below the positioning block 5 and the clamping device 4 to support them. The balancing frame 7 can be fixed to the rotary table 6 with fasteners to support the U-shaped heat exchange tube. In a preferred embodiment, during bending, the heat exchange tube can be placed on the balancing frame 7, and the center position of the heat exchange tube can be adjusted to the circular groove formed by the positioning block 5 and the clamping device 4. In some embodiments, a plurality of wheels 15 can be provided at the other end of the clamping device 4. The heat exchange tube can slide along the plurality of wheels 15. In a preferred embodiment, the fasteners can be bolts and nuts. In other embodiments, the fasteners can be screws, threaded rods, bolts, pins, or any type of fastener deemed appropriate by those skilled in the art.In some embodiments, the balance frame 7 can be L-shaped and fixed at one end to the rotary table 6 to support the U-shaped heat exchange tube and ensure that the U-shaped heat exchange tube is bent in a predetermined direction. In a preferred embodiment, a cloth strip can be provided between the U-shaped heat exchange tube and the bending die 12 to prevent direct contact between the U-shaped heat exchange tube and the bending die 12. In a preferred embodiment, the first support member 9 can be located at the bottom of the rotary table 6, and one side of the first support member 9 coincides with the longitudinal axis of the rotary table 6. The fourth support member 14 can be located at the top of the rotary table 6, and the longitudinal axis of the fourth support member 14 can coincide with the longitudinal axis of the rotary table 6. The positioning block 5 can be fixed on the first support member 9, and one side of the positioning block 5 abuts against or is close to the clamping device 4. In a preferred embodiment, a second support member 10 and a third support member 13 can be provided on both sides of the rotary table 6. The second support member 10 and the third support member 13 can be fixed above the housing 1, and a first limiting member and a second limiting member are respectively provided above the second support member 10 and the third support member 13 to limit the rotation angle of the turntable 6 to ensure that the bending angle is controllable. At the same time, by adjusting the bending angle, the springback of the U-shaped heat exchange tube after bending is effectively controlled, so that the roundness after bending meets the requirements of the drawing. The first limiting member and the second limiting member are fixed to the second support member 10 and the third support member 13 by connecting members. In a preferred embodiment, the connecting member can be a bolt and a nut. In other embodiments, the connecting member can be a screw, threaded rod, bolt, pin, or any type of connecting member that is deemed appropriate by those skilled in the art.
[0022] Figure 2 A schematic diagram of a hydraulic station 11 for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of this disclosure is shown. The hydraulic station 11 may be located inside the housing 1. A hydraulic fastening device 3 may be placed above and connected to the hydraulic station 11. A clamping device 4 may be fixed to the hydraulic fastening device 3 by fasteners, such that the hydraulic fastening device 3 can drive the clamping device 4 to move back and forth. In a preferred embodiment, the fasteners may be bolts and nuts, and the number of fasteners may be three. In other embodiments, the fasteners may be screws, threaded rods, bolts, pins, or any type of fastener deemed appropriate by those skilled in the art.
[0023] Figure 3 A schematic diagram of a clamping device 4 for bending a large-diameter U-shaped heat exchange tube according to an exemplary embodiment of the present disclosure is shown. One end of the clamping device 4 can abut against and support the U-shaped heat exchange tube. For example, a plurality of wheels 15 can be provided at the other end of the clamping device 4, and the heat exchange tube can slide along the plurality of wheels 15. Figure 4 A cross-sectional view of a positioning block 5 of an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of the present disclosure is shown. Two grooves may be provided on one side of the positioning block 5, into which two U-shaped heat exchange tubes can be placed to simultaneously accommodate and support them during bending. This ensures uniform stress on the heat exchange tubes in the circumferential direction during bending, thereby preventing changes in the wall thickness of the U-shaped heat exchange tubes and / or cracks in the substrate after bending. Using the above apparatus, two U-shaped heat exchange tubes can be processed at once, while reducing bending errors between the U-shaped heat exchange tubes.
[0024] Figure 5 A schematic diagram of multiple supports for an apparatus for bending large-diameter U-shaped heat exchange tubes according to an exemplary embodiment of this disclosure is shown. The multiple supports can all be fixed to a rotary table 6 by fasteners. In a preferred embodiment, the fasteners can be bolts and nuts. In other embodiments, the fasteners can be screws, threaded rods, bolts, pins, or any type of fastener deemed suitable by those skilled in the art. A first support 9 can be located at the bottom of the rotary table 6, and one side of the first support 9 coincides with the longitudinal axis of the rotary table 6. A second support 10 and a third support 13 can be symmetrically located on both sides of the longitudinal axis of the rotary table 6, respectively, and can form a 60-degree angle with the longitudinal axis. In other embodiments, the second support 10 and the third support 13 can form angles of 45 degrees, 50 degrees, 55 degrees, 65 degrees, 70 degrees, or any angle deemed suitable by those skilled in the art with respect to the longitudinal axis. A fourth support 14 can be located at the top of the rotary table 6, and the longitudinal axis of the fourth support 14 can coincide with the longitudinal axis of the rotary table 6. The balance frame 7 can be fixed on the rotary table 6 to support the U-shaped heat exchange tube.
[0025] Compared with existing technologies, the technical solution of this utility model solves the problems of deformation, excessive residual stress, excessive wall thickness variation, and out-of-tolerance roundness of large-diameter U-shaped heat exchange tubes after bending. This utility model improves the bending quality and efficiency of U-shaped heat exchange tubes, saves labor costs for enterprises, reduces labor intensity, and provides a more efficient, reliable, and environmentally friendly solution for the field. Furthermore, this utility model can process multiple U-shaped heat exchange tubes at once, reducing bending errors between multiple U-shaped heat exchange tubes, and also optimizes the process flow and reduces production costs.
[0026] It should be understood that the systems in the various embodiments provided in this utility model can be combined, modified, and / or altered to form new technical solutions. Without inventive effort, these technical solutions should also be included within the scope of protection claimed by this utility model.
[0027] Numerous specific examples are provided in the embodiments described herein. It should be understood that these examples are for the purpose of elaborating on the implementation of the present invention in detail and are not intended to limit the scope of the invention. Embodiments of the present invention can be practiced without these specific examples. In some embodiments, structures and / or techniques well-known to those skilled in the art have not been shown in detail so as not to obscure the understanding of the present invention.
[0028] Although preferred embodiments of the present invention have been shown and described herein, it will be readily understood by those skilled in the art that these embodiments are provided by way of example only. Various changes, modifications, and substitutions will appear to those skilled in the art without departing from the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein are optionally used to implement the present invention. The scope of the present invention is intended to be defined by the claims, and thereby to cover structures within the scope of these claims and their equivalents.
Claims
1. An apparatus for bending large-diameter U-shaped heat exchange tubes, characterized in that, include: The housing has a hydraulic fastening device located above one end of the housing. A hydraulic power unit, which is placed inside the housing and connected to the hydraulic fastening device; A clamping device is fixed together with the hydraulic fastening device, so that the hydraulic fastening device can drive the clamping device to move back and forth to clamp and release the U-shaped heat exchange tube. A limiting device is placed on one side of the clamping device to limit the travel of the clamping device. A rotary table, which is positioned above the other end of the housing; A bending die, which is arranged around and fixed to the rotary table, is used to adjust the bending radius of the U-shaped heat exchange tube; A positioning block, wherein the positioning block is arranged on one side of the clamping device; A first support member, disposed below the positioning block and the clamping device, is used to support the positioning block and the clamping device; and A balancing frame, which is fixed to the rotary table by fasteners, supports the U-shaped heat exchange tube.
2. The apparatus according to claim 1, characterized in that, A speed reducer is installed below the rotary table, which drives the rotary table to rotate.
3. The apparatus according to claim 1, characterized in that, Two grooves are provided on one side of the positioning block to accommodate and support the two U-shaped heat exchange tubes simultaneously during bending.
4. The apparatus according to claim 3, characterized in that, The two grooves are identical in shape and size and are spaced apart.
5. The apparatus according to claim 3, characterized in that, The two grooves are different in shape and size and are separated by a certain distance.
6. The apparatus according to claim 1, characterized in that, The fasteners mentioned are bolts and nuts.
7. The apparatus according to claim 1, characterized in that, A cloth strip is provided between the U-shaped heat exchange tube and the bending die to prevent the U-shaped heat exchange tube and the bending die from direct contact.
8. The apparatus according to claim 1, characterized in that, A second support member and a third support member are provided on both sides of the turntable. The second support member and the third support member are fixed above the housing. A first limiting member and a second limiting member are respectively provided above the second support member and the third support member to limit the rotation angle of the turntable.
9. The apparatus according to claim 8, characterized in that, The first limiting member and the second limiting member are fixed to the second support member and the third support member by a connecting member.