A high-frequency straight seam welded pipe production line discharging device

Abstract

This application relates to the field of strip steel storage technology and discloses a discharge device for a high-frequency straight seam welded pipe production line, including a cage body. Two adjusting supports are symmetrically and movably installed inside the cage body. A discharge roller is rotatably mounted on the top of the cage body, and a guide shaft is fixedly installed on the side of the cage body near the discharge roller. The device uses torsion springs and correction plates to promptly correct the strip steel when it deflects. Simultaneously, the correction plates do not remain in constant contact with the side of the strip steel, thus reducing friction during its movement and lowering the probability of mismatch between the strip steel discharge speed and the traction speed on the production line. This maintains the stability of the strip steel conveying process, improves the production quality of the welded pipe, and allows for dynamic adjustment and buffering of the strip steel when tension fluctuations occur. This prevents instantaneous tension fluctuations caused by strip steel stacking, changes in discharge angle, etc., from impacting the equipment on the production line, thereby extending the equipment's service life.

Description

Technical Field

[0001] This application relates to the field of strip steel storage technology, and in particular to a discharge device for a high-frequency straight seam welded pipe production line. Background Technology

[0002] In the production process of high-frequency straight seam welded pipe, in order to prevent production line interruption, the strip steel in the form of a disc coil is first stored and unloaded by a horizontal spiral looper or a vertical material cage before being transported to the production line. When the end of the current strip steel coil is unwound and welded to the beginning of the next strip steel coil, the production line does not need to be stopped and restarted, thus ensuring the continuity of welded pipe production.

[0003] Vertical feed cages, due to their small footprint but limited load-bearing capacity, are often used in low-to-medium speed, small-to-medium diameter economical high-frequency straight seam welded pipe production lines. The starting end of the strip enters the feed cage under the action of the transfer rollers, and is stacked vertically within the cage. Then, under the action of the discharge rollers, it exits the cage and extends onto the production line. To prevent friction between the inner wall of the feed cage and the side of the strip, which could cause wear and undulations, the inner diameter of the feed cage usually needs to be slightly larger than the width of the strip. This results in the strip being discharged under the action of the discharge rollers and the traction rollers on the production line, in order to ensure… The smoothness of the strip steel during conveying cannot be achieved by installing vertical guide rollers at the discharge port, which may cause the strip steel to deviate. If the deviated strip steel is not corrected in time, the side of the strip steel will continue to rub against the inner wall of the cage, increasing the friction between the discharge roller and the strip steel, affecting the discharge speed of the strip steel. This results in a mismatch between the discharge speed of the strip steel and the traction speed of the traction roller on the production line, increasing the load on the traction roller drive source. Not only will the strip steel deviation affect the production quality of welded pipes, but it will also damage the drive source and affect its service life. Summary of the Invention

[0004] This application proposes a discharge device for a high-frequency straight seam welded pipe production line. This device features timely correction of deflected strip steel, while the correction plates do not remain in constant contact with the strip steel's side, thus reducing friction during the strip's movement. This decreases the probability of mismatch between the strip's discharge speed and the production line's traction speed, maintaining the stability of strip steel transport and improving the production quality of welded pipes. Furthermore, it dynamically adjusts and buffers the strip steel when tension fluctuations occur via correction rollers, preventing instantaneous tension fluctuations caused by strip steel stacking, changes in discharge angle, etc., from impacting the equipment on the production line and extending the equipment's service life. This addresses the problem of production quality fluctuations and reduced drive equipment lifespan caused by the inability to timely correct deflected strip steel during transport, leading to mismatch between the strip steel discharge speed and the production line's traction rollers.

[0005] To achieve the above objectives, this application adopts the following technical solution: a discharge device for a high-frequency straight seam welded pipe production line, comprising a guide shaft, a main guide roller is rotatably mounted on the outer side of the guide shaft and the main guide roller is located at the center of the guide shaft, and a correction roller is symmetrically rotatably mounted on the outer sides of both ends of the guide shaft, a torsion spring is fixedly mounted on the inner side wall of the correction roller, the torsion spring is sleeved on the outer side of the guide shaft, and the end of the torsion spring away from the correction roller is fixedly connected to the outer side of the guide shaft, and a spiral correction plate is fixedly mounted on the outer side of the correction roller. When the strip gradually shifts and coincides with the correction roller, the friction between the strip and the correction roller drives the correction roller and the correction plate to rotate. When the correction plate rotates, it gradually comes into contact with the side of the strip and guides and resets it.

[0006] Furthermore, the end of the straightening plate near the main guide roller is not flush with the side of the straightening roller. That is, a portion of the outer surface of the end of the straightening roller near the main guide roller is completely smooth. When the overlap area between the strip and the straightening roller is small, but the straightening roller rotates due to strip tension fluctuations or other reasons, the straightening plate will not affect the normal movement of the strip.

[0007] Furthermore, multiple secondary guide rollers are symmetrically and movably installed at both ends of the main guide roller, and the side of the correction roller closer to the main guide roller is in contact with the corresponding secondary guide roller. The secondary guide roller is C-shaped, and a support rod is fixedly installed on the side of the secondary guide roller closer to the main guide roller. Support slots adapted to the support rods are opened on both sides of the main guide roller and on the side of the secondary guide roller away from the support rods. The multiple secondary guide rollers are adjusted and assembled by engaging the support rods with the support slots.

[0008] Furthermore, a screw is slidably mounted at the end of the correction roller away from the main guide roller, and a handle is fixedly mounted at the end of the screw away from the correction roller, which movably penetrates the side wall of the material cage body. The position of the correction roller is adjusted by rotating the screw through the handle.

[0009] Furthermore, a limiting ring is rotatably installed at one end of the screw near the straightening roller, and a limiting groove adapted to the screw and the limiting ring is opened on the side of the straightening roller near the screw. The limiting groove limits the screw and the limiting ring, and when the straightening roller is rotated under force, the limiting ring will slide inside the limiting groove.

[0010] Furthermore, multiple load plates are symmetrically slidably mounted on the outer sides of both ends of the guide shaft. Two connecting rods are symmetrically fixedly mounted on the side of the load plate near the straightening roller. Connecting slots that engage with the connecting rods are provided on both the side of the straightening roller near the load plate and the side of the load plate away from the connecting rods. Multiple load plates are assembled and connected by engaging the connecting rods with the connecting slots.

[0011] The beneficial effects of this invention are as follows: This application provides a discharge device for a high-frequency straight seam welded pipe production line. During the strip steel's movement, when the strip steel deviates due to stacking and folding, the friction between the strip steel and the straightening roller drives the straightening roller and straightening plate to rotate. The torsion spring and straightening plate promptly correct the strip steel's deviation. At the same time, the straightening plate will not always be in contact with the side of the strip steel, thus increasing the friction during the strip steel's movement. This reduces the probability of the strip steel's discharge speed becoming mismatched with the traction speed on the production line, maintaining the stability of the strip steel's conveying, improving the production quality of the welded pipe, and also dynamically adjusting and buffering the strip steel when tension fluctuations occur. This prevents instantaneous tension fluctuations caused by strip steel stacking, changes in discharge angle, etc., from impacting the equipment on the production line, thus extending the equipment's service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the main guide roller, guide shaft and screw of the present invention; Figure 4 This is a schematic diagram of the structure of the guide shaft, the straightening roller, and the screw of the present invention; Figure 5 This is a schematic diagram of the structure of the correction roller, correction plate and limiting groove of the present invention; Figure 6 This is a schematic diagram of the structure of the secondary guide roller of the present invention; Figure 7 This is a schematic diagram of the structure of the load-bearing plate of the present invention.

[0013] In the diagram: 1. Material cage body; 2. Adjusting bracket; 3. Discharge roller; 4. Main guide roller; 5. Guide shaft; 6. Secondary guide roller; 7. Correcting roller; 8. Correcting plate; 9. Support rod; 10. Support slot; 11. Screw; 12. Rotary handle; 13. Limiting ring; 14. Limiting groove; 15. Load plate; 16. Connecting rod; 17. Connecting slot. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] See Figures 1 to 7 A discharge device for a high-frequency straight seam welded pipe production line includes a cage body 1. Two adjusting supports 2 are symmetrically and movably installed inside the cage body 1. A feed roller is located on one side of the cage body 1, and a discharge roller 3 is rotatably installed on the top of the cage body 1. A guide shaft 5 is fixedly installed on the side of the cage body 1 near the discharge roller 3. A main guide roller 4 is rotatably and finitely installed on the outer side of the guide shaft 5, and the main guide roller 4 is positioned at the center of the guide shaft 5. Multiple auxiliary guide rollers 6 are symmetrically and movably installed at both ends of the main guide roller 4. During production, the distance between the two adjusting supports 2 is adjusted to match the strip steel. The starting end of the strip steel, which is in the shape of a disc coil, enters the cage body 1 under the action of the feed roller, and the strip steel is positioned between the two adjusting supports 2. In the middle of bracket 2, the starting end of the strip steel then comes into contact with the discharge roller 3, and is then guided to the main guide roller 4, where it comes into contact with the main guide roller 4 and the auxiliary guide roller 6. Finally, it is guided and limited by the main guide roller 4 and the auxiliary guide roller 6 to the production line. After the strip steel is installed, the production line is started and the feed roller and discharge roller 3 are driven to rotate by the drive equipment. The rotation speed of the feed roller can be slightly greater than the rotation speed of the discharge roller 3, so that the strip steel entering the cage body 1 is stacked vertically inside the cage body 1. When the end of the current strip steel coil is completely discharged and welded to the starting end of the next strip steel coil, the strip steel stored inside the cage body 1 allows the production line to be operated without stopping and restarting, ensuring the continuity of welded pipe production.

[0016] See Figures 3 to 6 The secondary guide roller 6 is C-shaped. A support rod 9 is fixedly installed on the side of the secondary guide roller 6 near the main guide roller 4. Support grooves 10 adapted to the support rod 9 are opened on both sides of the main guide roller 4 and on the side of the secondary guide roller 6 away from the support rod 9. When the diameter of the welded pipe changes, the width of the strip changes. At the same time as adjusting the distance between the two adjusting brackets 2, the number of secondary guide rollers 6 also needs to be adjusted to match the width of the strip. The C-shaped secondary guide roller 6 can be directly fitted on the outside of the guide shaft 5. Then, the secondary guide roller 6 is slid so that the support rod 9 is engaged into the inside of the support groove 10, thereby completing the installation of the secondary guide roller 6 that fits against the main guide roller 4. Then, the remaining secondary guide rollers 6 are installed as needed until the common width of the main guide roller 4 and multiple secondary guide rollers 6 matches the width of the strip.

[0017] See Figures 3 to 4A guide shaft 5 has two symmetrically rotatably mounted correction rollers 7 on its outer ends. The side of the correction roller 7 closest to the main guide roller 4 is in contact with the corresponding auxiliary guide roller 6. A torsion spring (not shown in the figure) is fixedly mounted on the inner wall of the correction roller 7. The torsion spring is fitted onto the outer side of the guide shaft 5, and the end of the torsion spring furthest from the correction roller 7 is fixedly connected to the outer side of the guide shaft 5. Figure 3 For example, under the action of the torsion spring, the straightening roller 7 and the straightening plate 8 are kept in the initial position. The straightening plate 8 is fixedly installed on the outer side of the straightening roller 7. The straightening plate 8 is open spiral. One end of the straightening plate 8 is away from the main guide roller 4 and is flush with the side wall of the straightening roller 7 in the vertical direction. The end of the straightening plate 8 close to the main guide roller 4 extends spirally along the surface of the straightening roller 7 toward the main guide roller 4. When the strip is discharged normally without deviation, the strip comes into contact with the main guide roller 4 and the auxiliary guide roller 6 from below and drives the main guide roller 4 and the auxiliary guide roller 6 to rotate under the action of friction, ensuring the normal conveying of the strip.

[0018] When the strip steel experiences tension fluctuations during discharge due to accumulation and folding, or when the strip steel tilts to one side under its own weight, the strip steel will gradually deviate during discharge. As the strip steel deviates from the surface of the secondary guide roller 6 and gradually overlaps with the straightening roller 7, the friction between the strip steel and the straightening roller 7 gradually increases with the increase of the overlapping area. The straightening roller 7 gradually rotates counterclockwise under the action of friction and the traveling force of the strip steel, and the torsion spring is also twisted and rotated. When the straightening roller 7 rotates, it drives the straightening plate 8 to rotate synchronously until the side of the straightening plate 8 closest to the main guide roller 4 gradually contacts the side of the strip steel. As the straightening roller 7 continues to rotate, the straightening plate 8 gradually guides the strip steel towards the direction of the main guide roller 4. The strip is guided by extrusion and then corrected. As the strip gradually returns to its original position, the contact area between the strip and the correction roller 7 gradually decreases. When the friction between the strip and the correction roller 7 is insufficient to overcome the initial elastic force of the torsion spring, the correction roller 7 and the correction plate 8 gradually rotate in the opposite direction to return to their original position under the action of the torsion spring. The torsion spring and the correction plate 8 correct the strip in time when it deviates. At the same time, the correction plate 8 will not always be in contact with the side of the strip, which would increase the friction during the movement of the strip. This reduces the probability of the strip's output speed being mismatched with the traction speed on the production line, maintains the stability of the strip's conveying, improves the production quality of welded pipes, and extends the service life of the equipment.

[0019] The end of the straightening plate 8 near the main guide roller 4 is not flush with the side of the straightening roller 7. That is, a part of the outer surface of the end of the straightening roller 7 near the main guide roller 4 is completely smooth. When the strip deviates slightly within the normal range, although the overlapping area between the strip and the straightening roller 7 is small, the tension of the strip suddenly increases, and its positive pressure on the straightening roller 7 increases. This causes the straightening roller 7 to rotate even if the strip does not deviate excessively. At this time, the tension of the strip can be dynamically adjusted and buffered by overcoming the torsion spring force to drive the straightening roller 7 to rotate. This prevents the tension from fluctuating instantaneously due to strip stacking, changes in the discharge angle, etc., during the strip discharge process, which could impact the equipment on the production line and extend the service life of the equipment.

[0020] See Figures 4 to 5 A screw 11 is slidably mounted on the end of the straightening roller 7 away from the main guide roller 4. The end of the screw 11 away from the straightening roller 7 moves through the side wall of the material cage body 1 and is fixedly mounted with a handle 12. When the strip width changes, after the adjustment and assembly of each auxiliary guide roller 6 is completed, the screw 11 is driven to rotate by the handle 12, thereby adjusting the position of the straightening roller 7 so that the side of the straightening roller 7 close to the main guide roller 4 is in contact with the corresponding auxiliary guide roller 6 to match the strip width. A limit ring 13 is rotatably mounted on the end of the screw 11 close to the straightening roller 7. A limit groove 14 adapted to the screw 11 and the limit ring 13 is opened on the side of the straightening roller 7 close to the screw 11. The limit groove 14 limits the screw 11 and the limit ring 13. When the straightening roller 7 is rotated under force, the limit ring 13 will slide inside the limit groove 14, so that the screw 11 does not affect the normal operation of the straightening roller 7.

[0021] See Figures 3 to 7Multiple load plates 15 are symmetrically slidably mounted on the outer sides of both ends of the guide shaft 5. Two connecting rods 16 are symmetrically fixedly mounted on the side of the load plate 15 near the straightening roller 7. The straightening roller 7 has connecting grooves 17 that engage with the connecting rods 16 on both the side of the straightening roller 7 near the load plate 15 and the side of the load plate 15 away from the connecting rods 16. Because the strip steel used in different types of welded pipes is made of different materials and has different surface roughness, the friction between the strip steel and the straightening roller 7 is different when the overlapping area is the same. Therefore, when the strip steel deviates, the straightening roller 7 may rotate too frequently or not at all. Therefore, when the surface of the strip steel is relatively smooth, the multiple load plates 15 are slid away from the straightening roller 7 to release the connecting rods 16 from the straightening roller 7. The engagement between the slots 17 ensures that the initial torque that needs to be overcome when the strip passes over and rotates with the straightening roller 7 is relatively small. This avoids the situation where the straightening roller 7 cannot rotate due to insufficient friction, thus preventing the straightening plate 8 from correcting the strip. Conversely, when the surface of the strip is relatively rough, multiple load plates 15 are slid towards the straightening roller 7, so that the connecting rod 16 engages with the connecting slot 17 to connect multiple load plates 15 to the straightening roller 7. This results in a larger initial torque that needs to be overcome when the strip passes over and rotates with the straightening roller 7. This avoids the fatigue strain caused by the frequent rotation of the straightening roller 7 leading to frequent torsion and reset of the torsion spring, which would prevent the straightening roller 7 and the straightening plate 8 from resetting smoothly and affecting the service life of the torsion spring.

[0022] Working principle: During production, the distance between the two adjusting brackets 2 is adjusted to match the strip width. Simultaneously, the common width of the main guide roller 4 and multiple auxiliary guide rollers 6 is adjusted to match the strip width through the engagement between the support rod 9 and the support slot 10. Then, the correction roller 7 is adjusted to fit against the adjacent auxiliary guide roller 6 by rotating the screw 11. The starting end of the strip, in a disc-shaped coil, enters the material cage body 1 under the action of the feed roller, and the strip is positioned between the two adjusting brackets 2. Subsequently, the starting end of the strip fits against the discharge roller 3 and is guided to the main guide roller 4, where it meets the main guide roller 4 and the auxiliary guide rollers 6. The strip steel is brought into contact with the main guide roller 4 and the auxiliary guide roller 6 and finally guided and limited to the production line. After the strip steel is installed, the production line is started and the feed roller and discharge roller 3 are driven by the drive equipment to rotate. The rotation speed of the feed roller can be slightly greater than the rotation speed of the discharge roller 3, so that the strip steel entering the cage body 1 is stacked vertically inside the cage body 1. When the end of the current strip steel coil is completely unloaded and welded to the starting end of the next strip steel coil, the strip steel stored inside the cage body 1 allows the production line to be maintained without stopping and restarting, ensuring the continuity of welded pipe production.

[0023] When the strip steel experiences tension fluctuations during discharge due to stacking and folding, or when the strip steel tilts to one side under its own weight, the strip steel will gradually deviate during discharge. When the strip steel deviates slightly but within the normal range, although the overlap area between the strip steel and the straightening roller 7 is small, the sudden increase in strip steel tension increases the positive pressure on the straightening roller 7. This causes the straightening roller 7 to rotate even if the strip steel does not deviate excessively. At this time, by overcoming the torsion spring force to drive the straightening roller 7 to rotate, the tension of the strip steel can be dynamically adjusted and buffered. This prevents the instantaneous tension fluctuations caused by strip steel stacking, changes in discharge angle, etc. during the strip steel discharge process from impacting the equipment on the production line, thus extending the service life of the equipment.

[0024] As the strip shifts from the surface of the secondary guide roller 6 to gradually overlap with the straightening roller 7, the friction between them gradually increases due to the increased overlap area. Under the influence of this friction and the strip's travel force, the straightening roller 7 rotates counterclockwise, causing the torsion spring to rotate as well. This rotation of the straightening roller 7 drives the straightening plate 8 to rotate synchronously until it gradually contacts the side of the strip near the main guide roller 4. As the straightening roller 7 continues to rotate, the straightening plate 8 gradually pushes and guides the strip towards the main guide roller 4, thus correcting the strip's deviation and gradually restoring it to its original position. During the process, the contact area between the strip and the straightening roller 7 gradually decreases. When the friction between the strip and the straightening roller 7 is insufficient to overcome the initial elastic force of the torsion spring, the straightening roller 7 and the straightening plate 8 gradually rotate in the opposite direction to reset under the action of the torsion spring. The torsion spring and the straightening plate 8 correct the strip in time when it deflects. At the same time, the straightening plate 8 will not always be in contact with the side of the strip, which would increase the friction during the movement of the strip. This reduces the probability of the strip's output speed being mismatched with the traction speed on the production line, maintains the conveying stability of the strip, improves the production quality of welded pipes, and extends the service life of the equipment.

[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A discharge device for a high-frequency straight seam welded pipe production line, characterized in that, The system includes a guide shaft (5), on which a main guide roller (4) is rotatably mounted and positioned at the center of the guide shaft (5). A correction roller (7) is symmetrically mounted on the outer sides of both ends of the guide shaft (5). A torsion spring is fixedly mounted on the inner wall of the correction roller (7). The torsion spring is fitted onto the outer side of the guide shaft (5), and the end of the torsion spring away from the correction roller (7) is fixedly connected to the outer side of the guide shaft (5). A spiral correction plate (8) is fixedly mounted on the outer side of the correction roller (7). When the strip gradually shifts and overlaps with the correction roller (7), the friction between the strip and the correction roller (7) drives the correction roller (7) and the correction plate (8) to rotate. As the correction plate (8) rotates, it gradually contacts the side of the strip and guides it to reset.

2. The discharge equipment of a high-frequency straight seam welded pipe production line according to claim 1, characterized in that, The end of the correction plate (8) near the main guide roller (4) is not flush with the side of the correction roller (7). That is, a part of the outer surface of the end of the correction roller (7) near the main guide roller (4) is completely smooth. When the overlap area between the strip and the correction roller (7) is small, but the correction roller (7) rotates due to the tension fluctuation of the strip, the correction plate (8) will not affect the normal movement of the strip.

3. The discharge equipment of a high-frequency straight seam welded pipe production line according to claim 2, characterized in that, Multiple auxiliary guide rollers (6) are symmetrically and movably installed at both ends of the main guide roller (4), and the side of the correction roller (7) close to the main guide roller (4) is in contact with the corresponding auxiliary guide roller (6). The auxiliary guide roller (6) is C-shaped, and a support rod (9) is fixedly installed on the side of the auxiliary guide roller (6) close to the main guide roller (4). Support slots (10) adapted to the support rod (9) are opened on both sides of the main guide roller (4) and on the side of the auxiliary guide roller (6) away from the support rod (9). The multiple auxiliary guide rollers (6) are adjusted and assembled by engaging the support rod (9) with the support slot (10).

4. The discharge equipment of a high-frequency straight seam welded pipe production line according to claim 3, characterized in that, The end of the correction roller (7) away from the main guide roller (4) is slidably fitted with a screw (11). The end of the screw (11) away from the correction roller (7) moves through the side wall of the cage body (1) and is fixedly fitted with a handle (12). The screw (11) is rotated by the handle (12) to adjust the position of the correction roller (7).

5. The discharge equipment of a high-frequency straight seam welded pipe production line according to claim 4, characterized in that, A limiting ring (13) is rotatably installed at one end of the screw (11) near the straightening roller (7). A limiting groove (14) adapted to the screw (11) and the limiting ring (13) is opened on the side of the straightening roller (7) near the screw (11). The screw (11) and the limiting ring (13) are limited by the limiting groove (14). When the straightening roller (7) is rotated under force, the limiting ring (13) will slide inside the limiting groove (14).

6. The discharge equipment of a high-frequency straight seam welded pipe production line according to claim 5, characterized in that, Multiple load plates (15) are symmetrically slidably installed on the outer sides of both ends of the guide shaft (5). Two connecting rods (16) are symmetrically fixedly installed on the side of the load plate (15) near the correction roller (7). The side of the correction roller (7) near the load plate (15) and the side of the load plate (15) away from the connecting rod (16) are provided with connecting slots (17) that engage with the connecting rods (16). Multiple load plates (15) are assembled and connected by engaging the connecting rods (16) with the connecting slots (17).

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