Pipeline hot bending forming device

Abstract

The utility model provides a pipeline hot bending forming device, which relates to the technical field of pipe bending and comprises a steel pipe feeding mechanism, a heating mechanism and a pipe bending mechanism which are sequentially arranged along the conveying direction of a steel pipe, the steel pipe feeding mechanism is used for conveying a steel pipe body towards the heating mechanism, and the heating mechanism is positioned between the steel pipe feeding mechanism and the pipe bending mechanism. The pipe bending mechanism is used for preheating the to-be-bent part of the steel pipe and completing bending forming of a steel pipe body. According to the utility model, the independent heat treatment procedure and the pipe bending process in the traditional process are deeply fused, and the steel pipe is synchronously heated by using the working clearance of the pipe bending process, so that the production time additionally occupied by the traditional'centralized heat treatment after pipe bending 'is avoided, the heating mechanism accurately preheats the to-be-bent part of the steel pipe before pipe bending, and the production efficiency is improved. The material is bent in a thermoplastic state, the internal stress is naturally released, and subsequent concentrated annealing is not needed. Compared with a traditional process, the residual stress of the formed pipeline is reduced, and the defect rate of surface wrinkles, cracks and the like is reduced.

Description

Technical Field

[0001] This utility model mainly relates to the field of pipe bending technology, specifically to a pipe hot bending forming device. Background Technology

[0002] In modern industry, pipeline systems, as critical infrastructure for fluid transport, are widely used in numerous sectors including petroleum, natural gas, chemical, power, and construction. Steel pipes, as the main components of these systems, often need to be bent at specific angles to accommodate complex pipeline layouts. While mechanized pipe bending devices have streamlined the pipe feeding and bending process with industrial development, traditional systems still face significant technical bottlenecks. After bending, an additional centralized heat treatment process is required to eliminate internal material stress, a process defect that has long constrained production efficiency and cost control.

[0003] Traditional pipe bending devices cause uneven plastic deformation at the bending points of steel pipes, leading to residual stress concentration. Without subsequent heat treatment, the pipe fittings may experience shape distortion and weld cracking during service due to stress release. However, centralized heat treatment processes have drawbacks, requiring the batch transportation of bent pipe fittings to the heat treatment furnace, increasing logistics costs and time losses. Utility Model Content

[0004] 1. The technical problem to be solved by the utility model:

[0005] This utility model provides a pipe hot bending forming device to solve the technical problems existing in the background art.

[0006] 2. Technical Solution:

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows: a pipe hot bending forming device, comprising a steel pipe feeding mechanism, a heating mechanism and a bending mechanism arranged sequentially along the steel pipe conveying direction. The steel pipe feeding mechanism is used to convey the steel pipe body towards the heating mechanism. The heating mechanism is located between the steel pipe feeding mechanism and the bending mechanism and is used to preheat the part of the steel pipe to be bent. The bending mechanism is used to complete the bending forming of the steel pipe body.

[0008] Preferably, the steel pipe feeding mechanism includes a support frame, a moving mechanism is provided on the support frame, a moving seat is provided on the output end of the moving mechanism, the moving mechanism is used to drive the moving seat into the heating mechanism, the moving seat is used to install a clamp, and the clamp is used to clamp the steel pipe body.

[0009] Preferably, the moving mechanism includes two bearing seats mounted on the support frame, a screw is rotatably mounted between the two bearing seats, a threaded sleeve is threadedly mounted on the screw, the moving seat is connected to the threaded sleeve, the moving mechanism is used to drive the moving seat to move along the axial direction of the screw, and a motor is also mounted on the support frame, the motor is fixedly connected to the screw, and the motor is used to drive the screw to rotate.

[0010] Preferably, the moving mechanism further includes guide rails mounted on the support frame, with two guide rails located on both sides of the screw, and a slider fixedly mounted on the bottom of the moving seat, the slider slidingly engaging with the guide rails.

[0011] Preferably, the heating mechanism includes a mounting bracket on which a medium-frequency electric heating device, a support wheel, and a photoelectric sensor are mounted. The medium-frequency electric heating device is used to heat the steel pipe body. The support wheel is located on the side of the medium-frequency electric heating device near the steel pipe feeding mechanism and is used to support the steel pipe body. The photoelectric sensor is located on the lower side of the medium-frequency electric heating device and is used to detect the position of the steel pipe body.

[0012] 3. Beneficial effects:

[0013] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0014] This invention utilizes a pipe feeding mechanism to achieve fixed-length conveying and precise positioning of the steel pipe body, ensuring that the pipe body accurately enters the heating and bending mechanisms. The pipe body is held by grippers, guaranteeing stability during conveying and preventing deviation or shaking. The heating mechanism preheats the portion of the pipe body to be bent, giving the steel material better plasticity and toughness in a hot state, facilitating bending. The bending mechanism then bends the heated pipe body to achieve the required shape and size.

[0015] This utility model's steel pipe feeding mechanism achieves automated steel pipe conveying, reducing manual operation and improving production efficiency. The heating mechanism heats the steel pipe during conveying, avoiding the time wasted on separate heating in traditional processes and shortening the production cycle. Precise pipe positioning and heating control ensure good dimensional and shape accuracy of the steel pipe during hot bending. The heated steel pipe material exhibits improved plasticity and toughness, reducing defects such as cracks and wrinkles during bending and improving product quality.

[0016] This invention deeply integrates the independent heat treatment process in traditional manufacturing with the pipe bending process. It utilizes the working intervals of the bending process to simultaneously heat the steel pipe, avoiding the extra production time required for the traditional "concentrated heat treatment after bending." This shortens the process time. The heating mechanism precisely preheats the part of the steel pipe to be bent before bending, allowing the material to bend in a thermoplastic state, naturally releasing internal stress without the need for subsequent concentrated annealing. Compared to traditional processes, the residual stress in the formed pipe is reduced, and the rate of defects such as surface wrinkles and cracks is decreased. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a perspective view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the steel pipe feeding mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the moving mechanism structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the heating mechanism structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the pipe bending mechanism of this utility model.

[0023] Figure label:

[0024] 1. Pipe feeding mechanism; 11. Support frame; 12. Moving mechanism; 121. Bearing seat; 122. Screw; 123. Threaded sleeve; 124. Motor; 125. Guide rail; 126. Slider; 13. Moving seat; 14. Gripper; 2. Heating mechanism; 21. Mounting support; 22. Medium frequency electric heating device; 23. Support wheel; 24. Photoelectric sensor; 3. Pipe bending mechanism; 4. Steel pipe body. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Example

[0030] See attached document Figures 1-6 A pipe hot bending forming device includes a steel pipe feeding mechanism 1, a heating mechanism 2 and a bending mechanism 3 arranged sequentially along the steel pipe conveying direction. The steel pipe feeding mechanism 1 is used to convey the steel pipe body 4 towards the heating mechanism 2. The heating mechanism 2 is located between the steel pipe feeding mechanism 1 and the bending mechanism 3 and is used to preheat the part of the steel pipe to be bent. The bending mechanism 3 is used to complete the bending forming of the steel pipe body 4.

[0031] The steel pipe feeding mechanism 1 includes a support frame 11, a moving mechanism 12 is provided on the support frame 11, and a moving seat 13 is provided on the output end of the moving mechanism 12. The moving mechanism 12 drives the moving seat 13 into the heating mechanism 2. The moving seat 13 is used to install the clamp 14, and the clamp 14 is used to clamp the steel pipe body 4.

[0032] The moving mechanism 12 includes two bearing seats 121 mounted on the support frame 11. A screw 122 is rotatably mounted between the two bearing seats 121. A threaded sleeve 123 is threadedly mounted on the screw 122. The moving seat 13 is connected to the threaded sleeve 123. The moving mechanism 12 is used to drive the moving seat 13 to move along the axial direction of the screw 122. A motor 124 is also mounted on the support frame 11. The motor 124 is fixedly connected to the screw 122. The motor 124 is used to drive the screw 122 to rotate.

[0033] The moving mechanism 12 also includes guide rails 125 mounted on the support frame 11. The two guide rails 125 are located on both sides of the screw 122. A slider 126 is fixedly mounted on the bottom of the moving seat 13. The slider 126 slides in cooperation with the guide rails 125.

[0034] The heating mechanism 2 includes a mounting bracket 21, on which a medium-frequency electric heating device 22, a support wheel 23, and a photoelectric sensor 24 are mounted. The medium-frequency electric heating device 22 is used to heat the steel pipe body 4. The support wheel 23 is located on the side of the medium-frequency electric heating device 22 close to the steel pipe feeding mechanism 1 and is used to support the steel pipe body 4. The photoelectric sensor 24 is located on the lower side of the medium-frequency electric heating device 22 and is used to detect the position of the steel pipe body 4.

[0035] Working principle:

[0036] The gripper 14 is mounted on the movable seat 13. When the steel pipe body 4 is placed in the designated position, the gripper 14 fixes the steel pipe by mechanical clamping or hydraulic / pneumatic means to ensure that the steel pipe does not slip during the conveying process.

[0037] Motor 124 starts, driving screw 122 to rotate. Screw 122 and threaded sleeve 123 are connected by a thread, converting the rotational motion into axial linear motion. Threaded sleeve 123 drives movable seat 13 to move axially along screw 122. Simultaneously, slider 126 at the bottom of movable seat 13 slides on guide rail 125, ensuring stability and linear accuracy of movement. Movable seat 13 drives gripper 14 and steel pipe body 4 to be conveyed towards heating mechanism 2 until the part of the steel pipe to be bent enters the designated position of heating mechanism 2.

[0038] Under the push of the pipe feeding mechanism, the front end of the steel pipe body 4 is supported by the support wheel 23. The support wheel 23 can rotate freely, reducing friction when the steel pipe moves, and ensuring that the axis of the steel pipe is aligned with the center line of the heating mechanism and the bending mechanism. After the medium frequency electric heating device 22 is powered on, it rapidly heats the part of the steel pipe body 4 to be bent through the principle of electromagnetic induction, so that the steel pipe body 4 locally reaches a suitable temperature for bending.

[0039] The photoelectric sensor 24 is located below the medium-frequency electric heating device 22, and detects the position of the steel pipe body 4 in real time to ensure that the part to be bent accurately enters the heating area. When the steel pipe body 4 is in place, the sensor sends a feedback signal, which can control the steel pipe feeding mechanism 1 to stop moving, so that the medium-frequency electric heating device 22 is precisely fixed.

[0040] After the section of the steel pipe body 4 to be bent is heated to the predetermined temperature, the steel pipe feeding mechanism 1 continues to push the steel pipe body 4 toward the bending mechanism 3, or the bending mechanism 3 receives the steel pipe body 4 by its traction device.

[0041] The pipe bending mechanism 3 typically includes bending dies (such as bending dies, clamping dies, guide dies, etc.), which apply bending torque to the heated steel pipe body 4 via mechanical transmission (such as hydraulic cylinders, servo motors). During the bending process, the steel pipe body 4 is more prone to deformation in the heated section due to increased plasticity caused by the increased temperature, while the unheated section maintains a certain rigidity, ensuring the stability of the bent shape. Based on the preset bending angle and radius, the pipe bending mechanism 3 monitors the bending process in real time through sensors (such as angle encoders, displacement sensors), and closed-loop control ensures forming accuracy.

[0042] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pipe hot bending forming device, characterized in that: The system includes a steel pipe feeding mechanism (1), a heating mechanism (2), and a pipe bending mechanism (3) arranged sequentially along the steel pipe conveying direction. The steel pipe feeding mechanism (1) is used to convey the steel pipe body (4) towards the heating mechanism (2). The heating mechanism (2) is located between the steel pipe feeding mechanism (1) and the pipe bending mechanism (3) and is used to preheat the part of the steel pipe to be bent. The pipe bending mechanism (3) is used to complete the bending and forming of the steel pipe body (4). The steel pipe feeding mechanism (1) includes a support frame (11), a moving mechanism (12) is provided on the support frame (11), a moving seat (13) is provided on the output end of the moving mechanism (12), the moving mechanism (12) is used to drive the moving seat (13) into the heating mechanism (2), the moving seat (13) is used to install a clamp (14), and the clamp (14) is used to clamp the steel pipe body (4). The moving mechanism (12) includes two bearing seats (121) mounted on the support frame (11), and a screw (122) is rotatably mounted between the two bearing seats (121). A threaded sleeve (123) is threadedly mounted on the screw (122). The moving seat (13) is connected to the threaded sleeve (123). The moving mechanism (12) is used to drive the moving seat (13) to move along the axial direction of the screw (122). A motor (124) is also mounted on the support frame (11). The motor (124) is fixedly connected to the screw (122). The motor (124) is used to drive the screw (122) to rotate.

2. The pipe hot bending forming device according to claim 1, characterized in that: The moving mechanism (12) also includes guide rails (125) mounted on the support frame (11). The two guide rails (125) are located on both sides of the screw (122). A slider (126) is fixedly mounted on the bottom of the moving seat (13). The slider (126) slides with the guide rails (125).

3. The pipe hot bending forming device according to claim 1, characterized in that: The heating mechanism (2) includes a mounting bracket (21), on which a medium-frequency electric heating device (22), a support wheel (23), and a photoelectric sensor (24) are mounted. The medium-frequency electric heating device (22) is used to heat the steel pipe body (4). The support wheel (23) is located on the side of the medium-frequency electric heating device (22) close to the steel pipe feeding mechanism (1). The support wheel (23) is used to support the steel pipe body (4). The photoelectric sensor (24) is located on the lower side of the medium-frequency electric heating device (22). The photoelectric sensor (24) is used to detect the position of the steel pipe body (4).

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