A high frequency pipe welding apparatus for pipe welding

Abstract

The utility model relates to high -frequency welded pipe technical field, and disclose a kind of high-frequency welded pipe welding equipment for welded pipe processing, including base and two extrusion rollers of relative arrangement to form conveying channel, the inlet of the conveying channel is provided with high-frequency current heater, the inside of the base is provided with driving element;Roller shaft is detachably installed in the middle of the extrusion roller, and the lower end of the roller shaft is rotatably connected with base through bearing and extends to the inside of base.The utility model directly drives two extrusion rollers to rotate actively, provides stable feeding power for pipe, which actively offsets the influence of external traction and extrusion reaction force on bearing seat, significantly reduces the risk of micro plastic deformation or displacement of bearing seat due to long-term bearing of huge one-way extrusion force, fundamentally guarantees the stability of gap and parallelism between two extrusion rollers, so that extrusion line remains constant, greatly improves the uniformity of weld quality and yield.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency welded pipe technology, specifically to a high-frequency welded pipe welding equipment for welded pipe processing. Background Technology

[0002] High-frequency straight seam welded pipe technology is a key process in modern metal pipe manufacturing. It involves forming a steel strip into a pipe blank, and then rapidly heating the edges of the blank to a molten state using the skin effect and proximity effect of high-frequency current. Welding is then achieved under the radial pressure of extrusion rollers. In this process, the extrusion rollers, as the core actuators, directly determine the quality of the weld due to the stability of their operation. The extrusion line (i.e., the weld line) formed between the two extrusion rollers must maintain extremely high alignment, parallelism, and a constant gap to ensure a uniform, dense weld free from defects such as incomplete welds or slag inclusions.

[0003] Currently, in the welding equipment commonly used in the industry, the extrusion rollers are usually rigidly mounted on the equipment frame via bearing seats, and their rotational power depends on the external traction force passively driven by the advancing pipe. This structure has revealed significant problems during long-term continuous production: the extrusion rollers need to withstand continuous and huge radial extrusion forces. This force, together with the external traction force, acts on the bearing seats and their mounting base, which can easily lead to cumulative micro-plastic deformation of the support structure or displacement of the installation position. Even a small deformation can damage the relative positional accuracy between the two extrusion rollers, causing fluctuations or displacement of the extrusion line. As a result, not only is the weld quality uneven and the product qualification rate reduced, but the need for frequent shutdowns for adjustment also seriously affects production efficiency.

[0004] Therefore, in view of the above-mentioned defects of existing high-frequency welded pipe welding equipment, it is urgent to develop a new type of welding equipment that can effectively suppress the deformation of the support structure and ensure the long-term stability of the extrusion line, so as to meet the needs of continuous production of high-quality welded pipes. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a high-frequency welded pipe welding equipment for welded pipe processing.

[0006] This utility model proposes a high-frequency welded pipe welding equipment for welded pipe processing, including a base and two extrusion rollers arranged opposite each other to form a conveying channel. A high-frequency current heater is provided at the entrance of the conveying channel, and a driving component is provided inside the base.

[0007] A roller shaft is detachably mounted in the middle of the extrusion roller, and the lower end of the roller shaft is rotatably connected to the base via a bearing and extends into the base.

[0008] The device also includes a transmission mechanism located inside the base, which transmits the output power of the drive component to the two roller shafts and drives the two extrusion rollers to rotate in opposite directions.

[0009] Preferably, the transmission mechanism includes:

[0010] The first gear is fixedly installed at the lower end of the two roller shafts;

[0011] And a pair of meshing second gears, the second gears being rotatably mounted in the base via a gear shaft, and each of the second gears meshing with the adjacent first gear;

[0012] The output end of the drive unit is connected to the gear shaft of one of the second gears.

[0013] Preferably, the detachable connection structure between the extrusion roller and the roller shaft is as follows:

[0014] The extrusion roller has an axially penetrating sleeve hole in the middle, and the inner wall of the sleeve hole has an axially extending limiting groove.

[0015] The upper outer wall of the roller is provided with a limiting plate that matches the limiting groove;

[0016] The limiting plate and the limiting groove are inserted into each other.

[0017] Preferably, the upper end of the roller shaft is also threaded with two limiting nuts, which are located on the upper and lower end faces of the extrusion roller, respectively, for axial pressing and positioning of the extrusion roller after installation.

[0018] Preferably, the device further includes auxiliary rollers symmetrically arranged on both sides of the conveying channel for rolling the open edge of the pipe.

[0019] Preferably, the auxiliary roller is mounted on the base via a rotatable support structure;

[0020] The support structure includes a support arm hinged to the base and a connecting arm connected to the support arm, with the auxiliary roller rotatably mounted on the lower end of the connecting arm.

[0021] Preferably, a limiting block is provided on the inner side of the support arm, and a limit switch is provided on the base;

[0022] When the support arm is in the vertical working position, the limit switch acts on the limit block to achieve locking.

[0023] Preferably, the limit switch includes a limit plate that is rotatably connected to the base via a damping shaft, and the limit plate can rotate and press against the upper end face of the limit block.

[0024] Preferably, the driving component is a motor, and its output end is connected to the gear shaft of the second gear through a belt drive or chain drive structure.

[0025] Preferably, the high-frequency current heater has an annular heating section, the center of which is concentric with the conveying channel.

[0026] The high-frequency welding equipment for welded pipe processing proposed in this utility model has the following beneficial effects:

[0027] (i) By setting up built-in drive components and transmission mechanisms, the two extrusion rollers are directly driven to rotate actively in opposite directions, providing stable feeding power for the pipe. This can actively counteract the influence of external traction force and extrusion reaction force on the bearing seat, significantly reducing the risk of slight plastic deformation or displacement of the bearing seat due to long-term exposure to huge unidirectional extrusion force. This fundamentally ensures the stability of the gap and parallelism between the two extrusion rollers, thereby keeping the extrusion line constant and greatly improving the uniformity of weld quality and yield.

[0028] (ii) The extrusion roller is connected to the limit plate and the limit groove through the insertion and engagement, and is axially fixed by the upper and lower limit nuts, which realizes quick assembly and disassembly with the roller shaft. This modular design is extremely convenient when the extrusion roller needs to be replaced or repaired, greatly shortens the downtime and improves the equipment maintenance efficiency.

[0029] (iii) The auxiliary rollers and their support arms and connecting arms adopt an outward hinge design and are equipped with limit blocks and limit switches for locking. This structure allows the space above the equipment to be opened quickly, which greatly facilitates the observation, debugging and maintenance of key components such as the extrusion rollers, pipe channels and high-frequency current heaters.

[0030] (iv) The gear transmission mechanism is used to realize the synchronous rotation of the two rollers in opposite directions. The transmission ratio is accurate and the power transmission is smooth. The entire drive and transmission system is integrated into the base, making the equipment structure compact and neat in appearance, while reducing the risk of external mechanical damage.

[0031] (v) The symmetrically arranged auxiliary rollers pre-roll and position the opening edge of the tube blank before welding. Together with the actively rotating extrusion roller, they ensure the accuracy of the alignment of the tube blank edge during heating and extrusion, further improving the stability and reliability of high-frequency welding.

[0032] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] Figure 1 This is a front structural diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0035] Figure 3 This is a schematic diagram of the assembly structure of the extrusion roller and roller shaft of this utility model.

[0036] Figure descriptions: 1. Base; 2. Extrusion roller; 3. High-frequency current heater; 4. Auxiliary roller; 5. Pipe; 6. Support arm; 7. Connecting arm; 8. Limit block; 9. Limit switch; 10. Roller shaft; 11. First gear; 12. Second gear; 13. Drive component; 14. Limit plate; 15. Limit groove; 16. Limit nut. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] Please see Figures 1-3 A high-frequency welded pipe welding device for welded pipe processing includes a base 1. Two extrusion rollers 2 are rotatably mounted on the upper end of the base 1. The two extrusion rollers 2 are arranged opposite each other to form a conveying channel through which the pipe 5 passes. A high-frequency current heater 3 is also provided above the base 1 at the entrance of the conveying channel. The high-frequency current heater 3 has an annular heating part and the center of the annulus is concentric with the conveying channel so as to heat the opening edge of the pipe 5 at high frequency. The extrusion rollers 2 are used to extrude the pipe 5 to merge the opening edge and realize high-frequency welding.

[0039] The upper end of the base 1 is also equipped with auxiliary rollers 4 symmetrically distributed on both sides of the opening of the pipe 5. The auxiliary rollers 4 roll the edge of the opening to improve the stability of high frequency welding.

[0040] The upper ends of the base 1 are hinged to both sides with support arms 6 that can be flipped open outwards. The support arms 6 are L-shaped, with one end extending horizontally at a right angle to the top of the tube 5 and a connecting arm 7 installed thereon. The other end of the connecting arm 7 extends downwards and toward the opening of the tube 5. The auxiliary roller 4 is rotatably connected to the lower end of the adjacent connecting arm 7 through the wheel axle. The flipping design of the support arms 6 facilitates the opening of the extrusion roller 2, the tube 5 and the high-frequency current heater 3, thereby facilitating inspection and maintenance.

[0041] A limit block 8 is installed on the inner side of the lower end of the support arm 6. When the lower end of the support arm 6 is perpendicular to the upper end surface of the base 1, the limit block 8 is in contact with the upper end surface of the base 1. A limit switch 9 for locking the limit block 8 is installed on the upper end surface of the base 1, which can fix the state of the support arm 6 and improve the working stability.

[0042] The limit switch 9 includes a limit plate. One end of the limit plate is rotatably connected to the upper end face of the base 1 through a damping shaft. The other end of the limit plate is pressed against the upper end face of the limit block 8 through a rotating cover, thereby restricting the limit block 8 from flipping outward with the support arm 6, thereby achieving the fixation and locking of the support arm 6.

[0043] A roller shaft 10 is detachably installed in the middle of the extrusion roller 2. The lower end of the roller shaft 10 is rotatably connected to the upper end of the base 1 through a bearing. The lower ends of both roller shafts 10 extend into the base 1 and are connected to the output end of the transmission mechanism. The input end of the transmission mechanism is driven by the drive component 13 inside the base 1. The drive component 13 drives the transmission mechanism to drive the two first gears 11 to rotate in opposite directions, thereby realizing the active rotation of the two extrusion rollers 2. This enables the stable feeding of the pipe 5 in the conveying channel. Moreover, the active rotation of the extrusion rollers 2 can offset and weaken part of the radial extrusion force, avoid slight plastic deformation or displacement of the bearing seat, thereby ensuring the stability of the gap and parallelism between the two extrusion rollers, avoiding the extrusion line from shifting or fluctuating, thus improving the weld quality, avoiding defects such as false welding and slag inclusion, and helping to improve the yield and pressure bearing capacity of the welded pipe.

[0044] The transmission mechanism includes a first gear 11 mounted on the lower end of two rollers 10, and two second gears 12 located between the two first gears 11 and meshing horizontally. The second gears 12 are rotatably connected to the inner wall of the base 1 via gear shafts. The second gears 12 also mesh with the adjacent first gears 11 for transmission. The gear shaft of one of the second gears 12 is connected to the output end of the drive unit 13.

[0045] The drive unit 13 includes a motor installed inside the base 1. The output end of the motor is connected to the gear shaft of one of the second gears 12 via a synchronous belt or chain drive structure. This design enables the drive unit 13 to drive the second gear 12 and the first gear 11 meshing with it to rotate, thereby achieving the opposite rotation of the two first gears 11, which in turn drives the two roller shafts 10 to rotate in the opposite direction, thus achieving the opposite rotation of the two extrusion rollers 2.

[0046] In one embodiment, such as Figure 3As shown, the extrusion roller 2 has an axially penetrating sleeve hole in the middle. The inner wall of the sleeve hole has circumferentially distributed and axially extended limiting grooves 15. The upper outer wall of the roller shaft 10 is equipped with circumferentially distributed and axially extended limiting plates 14. The number of limiting plates 14 is the same as the number of limiting grooves 15 and they are inserted and assembled one by one, so that the extrusion roller 2 can be quickly and stably assembled with the upper end of the roller shaft 10.

[0047] Furthermore, two limiting nuts 16 are threaded onto the upper end of the roller 10. The two limiting nuts 16 are respectively set above and below the limiting plate 14 so that while abutting against the lower end face of the extrusion roller 2, they can also press and cover the upper end face of the extrusion roller 2, thereby realizing the limiting and stabilization of the detachable design of the extrusion roller 2.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-frequency welded pipe welding device for welded pipe processing, comprising a base (1) and two extrusion rollers (2) arranged opposite each other to form a conveying channel, wherein a high-frequency current heater (3) is provided at the entrance of the conveying channel, characterized in that: The base (1) is equipped with a drive component (13); The middle part of the extrusion roller (2) is detachably mounted with a roller shaft (10), the lower end of which is rotatably connected to the base (1) via a bearing and extends into the interior of the base (1); The device also includes a transmission mechanism located inside the base (1), which transmits the output power of the drive member (13) to the two roller shafts (10) and drives the two extrusion rollers (2) to rotate in opposite directions.

2. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 1, characterized in that, The transmission mechanism includes: The first gear (11) is fixedly installed at the lower end of the two rollers (10). And a pair of meshing second gears (12), the second gears (12) are rotatably mounted in the base (1) via a gear shaft, and each of the second gears (12) meshes with the adjacent first gear (11); The output end of the drive unit (13) is connected to the gear shaft of one of the second gears (12).

3. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 1, characterized in that, The detachable connection structure between the extrusion roller (2) and the roller shaft (10) is as follows: The extrusion roller (2) has an axially penetrating sleeve hole in the middle, and the inner wall of the sleeve hole has an axially extending limiting groove (15). The upper outer wall of the roller (10) is provided with a limiting plate (14) that is adapted to the limiting groove (15). The limiting plate (14) and the limiting groove (15) are inserted into each other.

4. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 3, characterized in that, The upper end of the roller (10) is also threaded with two limiting nuts (16), which are located on the upper and lower end faces of the extrusion roller (2) respectively, and are used to axially press and position the extrusion roller (2) after installation.

5. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 1, characterized in that, The equipment also includes auxiliary rollers (4) symmetrically arranged on both sides of the conveying channel for rolling the opening edge of the pipe (5).

6. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 5, characterized in that, The auxiliary roller (4) is mounted on the base (1) via a rotatable support structure; The support structure includes a support arm (6) hinged to the base (1) and a connecting arm (7) connected to the support arm (6), and the auxiliary roller (4) is rotatably mounted on the lower end of the connecting arm (7).

7. A high-frequency welded pipe welding equipment for welded pipe processing according to claim 6, characterized in that, The inner side of the support arm (6) is provided with a limit block (8), and the base (1) is provided with a limit switch (9). When the support arm (6) is in the vertical working position, the limit switch (9) acts on the limit block (8) to achieve locking.

8. The high-frequency welded pipe welding equipment for welded pipe processing according to claim 7, characterized in that, The limit switch (9) includes a limit plate that is rotatably connected to the base (1) via a damping shaft. The limit plate can rotate and press against the upper surface of the limit block (8).

9. A high-frequency welded pipe welding equipment for welded pipe processing according to claim 2, characterized in that, The driving component (13) is a motor, and its output end is connected to the gear shaft of the second gear (12) through a belt drive or chain drive structure.

10. A high-frequency welded pipe welding equipment for welded pipe processing according to claim 1, characterized in that, The high-frequency current heater (3) has an annular heating section, the center of which is concentric with the conveying channel.

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