A fitness steel pipe weld burr processing device

Abstract

The application discloses a fitness steel pipe welding seam burr processing device and belongs to the technical field of steel pipe high-frequency welding, which comprises a cutter seat connected with a cantilever cutter bar, a scraper is arranged on the top of the cutter seat, and an upper supporting roller is arranged on the top of the cutter seat; two groups of lifting rods are vertically slidably arranged relative to the cutter seat, the bottom end of the lifting rod is provided with a lower supporting roller, and the top end of the lifting rod is sealedly extended into a first piston hole of the cutter seat; a second piston hole is connected with the first piston hole and is vertically arranged, a transverse piston is arranged in the second piston hole, the transverse piston is assembled with a connecting rod through an extension assembly, and the extension assembly can convert the horizontal movement of the transverse piston into the circumferential rotary movement of the connecting rod; through the locking cooperation of the two groups of lifting rods with the cutter seat, on the basis of continuously forming stable support on the front end of the cantilever cutter bar, the two groups of lifting rods can retreat in turn to pass through the welding scars and hard protrusions on the inner wall of the steel pipe, and the extrusion and scratching of the scraper and the inner wall of the steel pipe are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of high-frequency welding technology for steel pipes, and in particular to a device for deburring weld seams of fitness steel pipes. Background Technology

[0002] During the production of high-frequency straight seam steel pipes, after the steel strip is formed and high-frequency extrusion welded, a raised inner weld bead will form at the weld seam on the inner wall of the steel pipe. If it is not removed in time, it will not only cause the inner wall of the steel pipe to be rough, but also affect subsequent processing steps such as galvanizing and plastic lining. Therefore, the production line is equipped with an inner weld seam burr removal device.

[0003] Currently, the devices used for internal burr removal in high-frequency welding machines mainly include cantilever cutter bars, cutter holders, scrapers, and hydraulic drive mechanisms. The tail of the cantilever cutter bar is mounted on the welding machine adjustment bracket. The scraper and upper support roller are installed on the top of the cutter holder, and the lower support roller is installed at the bottom of the cutter holder via a support arm. The lower support roller can support the suspended end of the cantilever cutter bar, thereby ensuring stable contact between the scraper and the inner weld seam of the steel pipe.

[0004] In actual use, since the support arm is usually locked to the tool holder, when the steel pipe is welded and formed, hard foreign objects such as weld beads, weld scars or extrusion protrusions are easily generated on the inner wall of the steel pipe. As the steel pipe continues to be conveyed forward, the lower support roller will be pushed upward by the pipe wall when it passes the protrusion position. The suspended end of the cantilever tool bar loses effective support and is lifted and shaken. The cutting edge of the scraper will be excessively squeezed against the inner wall of the steel pipe, which can easily scratch the steel pipe base material.

[0005] Therefore, it is necessary to provide a device for deburring weld seams of fitness steel pipes to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a device for deburring weld seams of fitness steel pipes, so as to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: a device for deburring weld seams of fitness steel pipes, comprising: A tool holder connected to a cantilever tool holder, with a scraper and an upper support roller mounted on the top of the tool holder; A lifting rod that can slide vertically relative to the tool holder, the lifting rod is provided in two sets, the bottom end of the lifting rod is provided with a lower support roller, and the top end of the lifting rod is sealed and extends into the first piston hole of the tool holder; A second piston hole is connected to and perpendicular to the first piston hole. A transverse piston is provided in the second piston hole. The transverse piston is equipped with a connecting rod via a telescopic assembly. The telescopic assembly can convert the horizontal movement of the transverse piston into the circumferential rotation of the connecting rod. The rotating rod is connected to the connecting rod drive. Both ends of the rotating rod are equipped with locking pins that can engage with the lifting rod. After the rotating rod rotates synchronously with the connecting rod, it can drive the locking pins to approach or disengage from the lifting rod, so that the two sets of lifting rods are alternately locked with the tool holder.

[0008] As a further aspect of the present invention: the tool holder is provided with a hydraulic flow channel communicating with the first piston hole.

[0009] As a further aspect of the present invention: a longitudinal piston is fixed at the top of the lifting rod, and the longitudinal piston is disposed in the first piston hole.

[0010] As a further aspect of the present invention, the lower support roller is elastically connected to the tool holder in the vertical direction.

[0011] As a further embodiment of the present invention: the telescopic assembly includes a first connector and a second connector, the first connector being fixedly connected to the transverse piston and slidingly engaged with the tool holder along the length direction of the tool holder, and the second connector being rotatably engaged with the connecting rod through a one-way bearing; It also includes a guide member and an inclined groove. One of the guide member and the inclined groove is located at the first joint and the other at the second joint. During the relative movement of the first joint and the second joint along the axis of the connecting rod, the second joint can be driven to rotate circumferentially through the sliding engagement of the guide member and the inclined groove.

[0012] As a further aspect of the present invention: multiple sets of first magnetic elements and second magnetic elements are respectively embedded on the end faces of the locking pin and the rotating rod. The first magnetic elements and second magnetic elements are evenly distributed and staggered along the circumference of the rotating rod, and the magnetic poles of the opposite end faces of the first magnetic elements and second magnetic elements are opposite.

[0013] As a further aspect of the present invention: one end of the inclined groove is connected to a straight groove, which is arranged parallel to the axis of the rotating rod. When the guided component slides from the inclined groove into the straight groove, the second joint is circumferentially locked.

[0014] As a further aspect of the present invention: the connecting rod and the rotating rod are arranged in parallel, and the two are connected by a transmission component, which is a belt or a gear set.

[0015] As a further aspect of the present invention: a limiting part is fixedly sleeved on the outer side of the locking pin, the limiting part is configured as a polygonal structure, the tool holder is provided with a guide groove for installing the locking pin, the inner wall of the guide groove is provided with a square groove area that slides with the limiting part, and the end of the limiting part near the rotating rod extends to the outer side of the end of the locking pin.

[0016] As a further aspect of the present invention: the diameter of the first piston hole is larger than the diameter of the second piston hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the device utilizes two sets of lifting rods to alternately lock with the cutter holder, and the two sets of lifting rods work together; on the basis of continuously forming stable support for the front end of the cantilever cutter bar, the two sets of lifting rods can successively retract to pass through the weld scars and hard protrusions on the inner wall of the steel pipe, effectively preventing the scraper from being squeezed and scraped against the inner wall of the steel pipe; Meanwhile, this structure achieves hydraulic linkage by relying on the interconnected first piston hole and second piston hole, which can drive the rotating rod to rotate without the need for an additional drive source, and automatically complete the alternating locking and switching between the two sets of lifting rods and the tool holder, thus facilitating the miniaturization of the tool holder. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position of the tool holder inside the steel pipe according to the present invention; Figure 3 This is a schematic diagram of the connection structure between the swing arm and the tool holder of the present invention; Figure 4 This is a perspective view of the tool holder of the present invention in a vertical cross-section; Figure 5 This is a plan view of the tool holder of the present invention in the vertical direction; Figure 6 This is a distribution diagram of the first magnetic component and the second magnetic component of the present invention; Figure 7 This is a schematic diagram of the guided member, straight groove, and inclined groove structure of the present invention; Figure 8 This is the present invention. Figure 4 A magnified structural diagram at point A.

[0020] In the diagram: 1. Cantilever cutter bar; 101. Base; 2. Adjusting bracket; 3. Steel pipe; 4. Cutter holder; 401. Hydraulic flow channel; 402. First piston hole; 5. Upper support roller; 6. Scraper; 7. Swing arm; 701. First swing arm; 702. Second swing arm; 8. Lower support roller; 9. Lifting rod; 10. Connecting rod; 11. Connecting protrusion; 12. Longitudinal piston; 13. Transverse piston; 14. First joint; 15. Second joint; 16. Rotating rod; 17. Locking pin; 1701. Limiting part; 18. Protruding ring; 1801. Pin hole; 19. Elastic element; 20. Connecting rod; 21. Support part; 22. Limiting post; 23. First magnetic element; 24. Second magnetic element; 25. Guided part; 26. Guide part; 2601. Inclined groove; 2602. Straight groove; 27. Transmission element. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] like Figures 1 to 8 As shown, a deburring device for weld seams of fitness steel pipes is mainly used for treating the inner weld seams of formed steel pipes 3 in high-frequency welding machines. The device as a whole includes a cantilever blade 1 and a blade holder 4 located at the end of the cantilever blade 1. A scraper 6 is fixedly installed on the blade holder 4 by bolts or other connecting parts. Figure 1 As shown, the cantilever cutter bar 1 has a base 101 at the end away from the cutter holder 4, and the base 101 is connected to the adjusting bracket 2 in the high-frequency welding machine. Specifically, the adjusting bracket 2 is equipped with a driving component such as an electric cylinder or a hydraulic cylinder, and the telescopic end of the driving component is fixedly connected to the base 101, which facilitates the adjustment of the height of the scraper 6 in the vertical direction, enabling the treatment of weld seams on the inner side of steel pipes 3 of different diameters.

[0024] The cantilever tool holder 1 is equipped with an impedance device in its middle section. This impedance device can concentrate the alternating magnetic flux generated by the high-frequency induction coil, and utilize the skin effect and proximity effect to concentrate the welding current at the weld bevel of the steel pipe 3, thereby improving the welding thermal efficiency. In addition, multiple flow channels are opened inside the cantilever tool holder 1 and the tool holder 4, which can carry media such as cooling water and hydraulic oil to achieve component cooling and hydraulic oil supply, respectively. The cantilever tool holder 1, the tool holder 4, and the scraper 6 are all existing mature components, and will not be described in detail in this solution. The following section focuses on a detailed description of the improved centering support assembly on the tool holder 4: The centering support assembly includes an upper support roller 5 and a lower support roller 8. The upper support roller 5 is rotatably installed in a pre-set slot at the top of the tool holder 4, and the outer surface of the upper support roller 5 is provided with an avoidance groove to avoid interference between the upper support roller 5 and the weld seam of the inner wall of the steel pipe 3.

[0025] The bottom of the tool holder 4 is hinged to a swing arm 7, and the lower support roller 8 is rotatably mounted on the bottom end of the swing arm 7. Figures 1-2As shown, in the specific operation, the vertical height of the cantilever cutter bar 1 is adjusted so that the upper support roller 5 is in contact with the inner wall of the steel pipe 3 and the scraper 6 is at the inner weld. The angle of the swing arm 7 is adjusted by hydraulic drive so that the lower support roller 8 abuts against the inner circular surface of the steel pipe 3, thereby supporting the suspended end of the cantilever cutter bar 1 and maintaining the horizontal stability of the cantilever cutter bar 1.

[0026] Combination Figures 3-8 As shown, the bottom of the tool holder 4, located at the swing arm 7, has a groove. The top end of the swing arm 7 is hinged to the groove via a pin, allowing the swing arm 7 to rotate around the pin to adjust its angle. The tool holder 4 has a lifting rod 9 connected to the swing arm 7. The lifting rod 9 slides vertically with the tool holder 4 and is located in the groove. Specifically, the top of the swing arm 7 protrudes outward to form a connecting protrusion 11. A connecting rod 10 is provided between the connecting protrusion 11 and the lifting rod 9, with both ends of the connecting rod 10 hinged to the lifting rod 9 and the connecting protrusion 11, respectively. With this structure, when the lifting rod 9 is moved vertically by hydraulic drive, the lifting rod 9 can push the swing arm 7 to rotate around the pin, thereby adjusting the lower support roller 8 to fit against the inner side of the steel pipe 3.

[0027] from Figures 4-5 As can be seen, the tool holder 4 is provided with a first piston hole 402 coaxially arranged with the lifting rod 9. A longitudinal piston 12 is fixed at one end of the lifting rod 9 extending into the first piston hole 402. The longitudinal piston 12 and the first piston hole 402 are sealed together by a sealing ring. The tool holder 4 is provided with a hydraulic flow channel 401 in the horizontal direction that communicates with the first piston hole 402. Hydraulic oil can be introduced into the first piston hole 402 through the hydraulic flow channel 401 to push the longitudinal piston 12 to move within the first piston hole 402, thereby adjusting the angle of the swing arm 7.

[0028] The angle of the swing arm 7 can be adjusted and locked through the hydraulic structure, so that the lower support roller 8 can adapt to steel pipes 3 of different diameters and provide rigid support for the suspended end of the cantilever cutter bar 1. However, in actual use, when there are weld scars or hard protrusions on the inner wall of the steel pipe 3, one end of the cantilever cutter bar 1 tends to be lifted when the lower support roller 8 passes through this area, which causes the scraper 6 to have excessive contact with the inner wall of the steel pipe 3 and easily scratches the inner wall of the steel pipe 3.

[0029] Based on this, this scheme has two sets of swing arms 7, as referenced. Figures 4-5 As shown, specifically, there are a first swing arm 701 and a second swing arm 702, which can be alternately locked with the tool holder 4. Specifically, refer to... Figure 5As shown, along the forward direction of the steel pipe 3, the first swing arm 701 is initially unlocked from the tool holder 4, while the second swing arm 702 remains locked to the tool holder 4. When there are weld scars or hard protrusions on the inner wall of the steel pipe 3, the lower support roller 8 at the bottom of the first swing arm 701 passes over the weld scar or protrusion first and retracts upward. During this process, the lower support roller 8 at the bottom of the second swing arm 702 can support the suspended end of the cantilever tool bar 1, thereby keeping the tool holder 4 and the scraper 6 stable. When the first swing arm 701 returns to its original position, it can be locked with the tool holder 4, while the second swing arm 702 unlocks from the tool holder 4, allowing the lower support roller 8 at the bottom of the second swing arm 702 to pass through weld scars or protrusions. During this process, the first swing arm 701 can support one end of the cantilever tool bar 1.

[0030] In summary, this device is equipped with two sets of swing arms 7 that can alternately lock and engage with the cutter holder 4. When there are foreign objects such as weld scars or hard protrusions on the inner wall of the steel pipe 3, one set of swing arms 7 can move upward with the protrusion of the pipe wall, while the other set of swing arms 7 remains locked and supported, continuously providing stable support to the front end of the cutter holder 4. The two sets of swing arms 7 alternately unlock and lock in a cycle, ensuring that the cutter holder 4 passes smoothly through the protruding area of ​​the pipe wall, suppressing the vertical displacement and shaking of the cutter holder 4 throughout the process, effectively maintaining the operational stability of the cutter holder 4 and the scraper 6, and preventing the scraper 6 from scraping against the steel pipe 3 base material.

[0031] The tool holder 4 is provided with a rotating rod 16 along its length. The rotating rod 16 is rotatably connected to the tool holder 4 via bearings. Both ends of the rotating rod 16 are provided with locking pins 17, which engage with the lifting rod 9. During the rotation of the rotating rod 16, the locking pins 17 can be attracted or repelled by magnetic force, thereby allowing the locking pins 17 to unlock or lock the lifting rod 9 to the tool holder 4. The tool holder 4 also includes a connecting rod 20, which is parallel to and connected to the rotating rod 16. The tool holder 4 has a second piston hole (not shown) that communicates with the first piston hole 402. The second piston hole is perpendicular to the first piston hole 402, and a transverse piston 13 is disposed within the second piston hole. The transverse piston 13 is sealed to the second piston hole by a sealing ring. The transverse piston 13 is connected to the connecting rod 20 via a telescopic assembly. The telescopic assembly is configured to rotate the horizontal movement of the transverse piston 13 into a circular motion of the connecting rod 20 around its own axis, thereby driving the rotating rod 16 to rotate.

[0032] Combination Figure 5As shown, when the first swing arm 701 travels to the weld scar or hard protrusion on the inner wall of the steel pipe 3, it will retract upwards, simultaneously squeezing the hydraulic oil inside the first piston hole 402; the pressurized hydraulic oil flows into the second piston hole, pushing the transverse piston 13 to move horizontally and compress the telescopic assembly. When the first swing arm 701 passes over the protruding structure and returns to its original position downwards, the telescopic assembly extends and drives the connecting rod 20 to rotate circumferentially. The connecting rod 20 then drives the rotating rod 16 to rotate synchronously via the transmission component 27. After the rotating rod 16 rotates, the force between the end of the rotating rod 16 near the first swing arm 701 and the locking pin 17 changes from magnetic attraction to repulsion, while the force between the other end and the corresponding locking pin 17 changes from repulsion to magnetic attraction, thus completing the state switch: the first swing arm 701 is locked and fixed to the tool holder 4, and the second swing arm 702 is released from the locking engagement with the tool holder 4.

[0033] It should be noted that the diameter of the first piston hole 402 is larger than that of the second piston hole, which facilitates the amplification of the displacement of the lifting rod 9. When the longitudinal piston 12 moves a short distance within the first piston hole 402, the hydraulic oil in the first piston hole 402 can enter the second piston hole and push the transverse piston 13 to move a longer distance.

[0034] In the above scheme, the lower support roller 8 is connected to the lifting rod 9 via the swing arm 7. Alternatively, in another embodiment, the lower support roller 8 can be directly installed at the bottom of the lifting rod 9. The difference lies in the following: when the lower support roller 8 is directly installed at the bottom of the lifting rod 9, the vertical movement distance of the lower support roller 8 can be directly transmitted to the lifting rod 9, thus avoiding weakening the vertical displacement of the lower support roller 8 and helping to maintain the vertical displacement of the longitudinal piston 12. However, when the lower support roller 8 is connected to the lifting rod 9 via the swing arm 7, the lower support roller 8 has a larger displacement during the swinging process of the lifting rod 9 driving the swing arm 7, thus accommodating steel pipes 3 with larger diameters. In this application, the connection of the lower support roller 8 to the lifting rod 9 via the swing arm 7 is used as an example for illustration.

[0035] The telescopic assembly includes a first connector 14 and a second connector 15. The first connector 14 is fixedly connected to the transverse piston 13 and slides along the length of the tool holder 4. The second connector 15 is coaxially arranged with the first connector 14 and rotates unidirectionally with the connecting rod 20 via a one-way bearing. Figure 5 , Figure 7 As shown, the first connector 14 and the second connector 15 are both stepped shafts. The end face of the first connector 14 and the second connector 15 near the connecting rod 20 is provided with a circular hole. The end of the second connector 15 away from the connecting rod 20 is inserted into the circular hole of the first connector 14. Furthermore, the inner wall of the circular hole of the first connector 14 extends outward along its diameter to form a guided member 25. The guided member 25 is a columnar protrusion. The outer circular surface of the section where the second connector 15 inserts into the first connector 14 is provided with a guiding portion 26 that mates with the guided member 25. The guiding portion 26 is a helical groove 2601 formed on the outer circular surface of the second connector 15. When the guided member 25 slides within the helical groove 2601, it can drive the second connector 15 to rotate, thereby driving the connecting rod 20 to rotate through the second connector 15. Of course, in actual use, the guided member 25 can also be located at the second connector 15, while the guiding portion 26 can be located on the inner wall of the circular hole of the first connector 14.

[0036] Combination Figure 6 As shown, multiple sets of first magnetic elements 23 and second magnetic elements 24 are fixedly embedded on the end face of the locking pin 17 opposite to the rotating rod 16. The first magnetic elements 23 and second magnetic elements 24 are evenly arranged and staggered along the circumferential direction. It should be noted that the magnetic poles of the outer surfaces of the first magnetic elements 23 and second magnetic elements 24 are opposite, and both the first magnetic elements 23 and second magnetic elements 24 are made of high-temperature resistant magnets, such as samarium cobalt magnets or neodymium iron boron magnets.

[0037] Based on the above structural setup, the working process of this solution is as follows: Reference Figure 5 Initially, the first magnetic element 23 near the end of the rotating rod 16 close to the first rocker arm 701 aligns with the second magnetic element 24 on the locking pin 17, so that the rotating rod 16 unlocks the first rocker arm 701 from the tool holder 4 through the magnetic attraction of the locking pin 17 at the first rocker arm 701. When the first rocker arm 701 passes the protrusion, the first rocker arm 701 folds upward and pushes the transverse piston 13 to move horizontally through the vertical movement of the longitudinal piston 12, and then drives the second connector 15 to move in the opposite direction through the cooperation of the guide 25 and the inclined groove 2601. Figure 4 The second connector 15 rotates in the direction X shown in the diagram. It should be noted that the second connector 15 rotates with the connecting rod 20 via a one-way bearing, allowing the second connector 15 to rotate only in the direction X. Figure 4 The direction X shown in the diagram drives the connecting rod 20 to rotate. Therefore, during the process of the first swing arm 701 folding upward and pushing the transverse piston 13 to move, the second joint 15 is in a state of rotating independently. When the first swing arm 701 passes the protrusion and returns to its original position, the longitudinal piston 12 moves downward along the first piston hole 402 and draws hydraulic oil from the second piston hole, causing the transverse piston 13 to return to its original position. During this process, the second connector 15 can be driven to move according to the guide member 25 and the inclined groove 2601. Figure 4Rotating in the direction X, as shown, allows the second connector 15 to synchronously drive the connecting rod 20 to rotate. The connecting rod 20, in turn, drives the rotating rod 16 to rotate synchronously via the transmission component 27. This aligns the first magnetic component 23 of the rotating rod 16 near the first swing arm 701 with the first magnetic component 23 at the end of the locking pin 17. Through the repulsive force between them, the locking pin 17 engages with the lifting rod 9 at the first swing arm 701. Simultaneously, the first magnetic component 23 of the rotating rod 16 near the second swing arm 702 aligns with the second magnetic component 24 on the locking pin 17. Through the magnetic attraction between them, the locking pin 17 disengages from the lifting rod 9 at the second swing arm 702, allowing the second swing arm 702 to unlock from the tool holder 4 and pass through the protrusions on the inner wall of the steel pipe 3.

[0038] In summary, this device utilizes the alternating locking engagement of the first swing arm 701 and the second swing arm 702 with the tool holder 4, with the two sets of swing arms 7 working in concert. While continuously providing stable support to the front end of the cantilever tool bar 1, the two sets of swing arms 7 can successively retract to avoid weld scars and hard protrusions passing through the inner wall of the steel pipe 3, effectively preventing the scraper 6 from being squeezed or scraped against the inner wall of the steel pipe 3. Simultaneously, this structure achieves hydraulic linkage through the interconnected first piston hole 402 and second piston hole, eliminating the need for an additional drive source to drive the rotating rod 16 to rotate, automatically completing the alternating locking and switching between the first swing arm 701, the second swing arm 702, and the tool holder 4, thus facilitating the miniaturization of the tool holder 4.

[0039] Combination Figures 6-7 As shown, the outer circumference of the second connector 15 is also provided with a straight groove 2602 that communicates with the inclined groove 2601. The straight groove 2602 is arranged parallel to the axial direction of the second connector 15. When the guided member 25 slides from the inclined groove 2601 into the straight groove 2602, the second connector 15 stops rotating and remains circumferentially locked; from Figure 6 As can be seen, the first magnetic element 23 and the second magnetic element 24 are circumferentially staggered, so that after the rotating rod 16 rotates at a certain angle, the first magnetic element 23 and the second magnetic element 24 can be completely aligned or staggered. Preferably, in this scheme, for every 90° rotation of the rotating rod 16, the first magnetic element 23 and the second magnetic element 24 can be completely aligned or staggered along the axis of the rotating rod 16. Through this structure, when the lower support roller 8 passes the protrusion on the inner wall of the steel pipe 3, the swing arm 7 folds upward and drives the transverse piston 13 to move horizontally, so that the guided part 25 can slide into the straight groove 2602 through the inclined groove 2601 and maintain circumferential locking on the second joint 15. During this process, the connecting rod 20 drives the rotating rod 16 to rotate 90° circumferentially through the transmission component 27, so that the first magnetic element 23 and the second magnetic element 24 are aligned or staggered. It should be noted that the transmission component 27 can be a belt or a gear set, etc.

[0040] Combination Figure 5 , Figure 8 As shown, in one embodiment, a pin hole 1801 that mates with the locking pin 17 can be provided on the outer circular surface of the lifting rod 9, so that the lifting rod 9 can be locked with the locking pin 17. Alternatively, a protruding ring 18 can be fixedly sleeved on the outer side of the lifting rod 9, with the pin hole 1801 located on the outer circular surface of the protruding ring 18. To accommodate steel pipes 3 of different diameters, multiple sets of pin holes 1801 can be provided along the axial direction of the lifting rod 9, so that the locking pin 17 can mate with different pin holes 1801 according to the diameter of the steel pipe 3.

[0041] Combination Figure 4 As shown, an elastic element 19 is connected between the swing arm 7 and the top wall of the groove. The elastic element 19 can be a limiting spring, and the swing arm 7 tends to open outward under the elastic force of the limiting spring. Specifically, when hydraulic oil is injected into the first piston hole 402 through the hydraulic flow channel 401, the longitudinal piston 12 can first drive the swing arm 7 to open downward, while the transverse swing arm 7 remains relatively stable. In the embodiment where the lower support roller 8 is directly connected to the lifting rod 9, an annular boss can be fixed on the outside of the lifting rod 9 at the bottom position. The limiting spring can be sleeved on the outside of the lifting rod 9 and connected between the boss and the bottom of the tool holder 4.

[0042] The tool holder 4 adopts a split left-right assembly structure, with the left and right parts respectively injection molded. The tool holder 4 has an internal receiving groove for accommodating components such as the first connector 14, the second connector 15, the connecting rod 20, the transmission component 27, and the rotating rod 16, providing installation references and arrangement space for each component. Combined with... Figure 5 As can be seen, along the length of the tool holder 4, the end of the receiving groove extends outward to form a limiting post 22. One end of the limiting post 22 extends into the interior of the first connector 14 and slides into the first connector 14, thereby restricting the circumferential rotation of the first connector 14 and achieving circumferential positioning. In addition, the cooperation between the limiting post 22 and the first connector 14 also prevents one end of the transverse piston 13 from entering the first piston hole 402. In the vertical direction, a support part 21 extends integrally inside the receiving groove, and the connecting rod 20 passes through the support part 21 for assembly. The two are circumferentially rotated and axially fixedly engaged. In actual assembly conditions, a spring can be added between the support part 21 and the first connector 14 so that the first connector 14 forms an elastic abutment engagement with the support part 21 along the length of the tool holder 4.

[0043] Reference Figure 5 The tool holder 4 has a guide groove communicating with the first piston hole 402, and the ends of the retaining pin 17 and the rotating rod 16 are both assembled inside the guide groove. Figure 6It is understood that the locking pin 17 is externally fixed with a limiting part 1701, which has a polygonal structure, preferably a quadrilateral structure in this embodiment. The inner wall of the guide groove is formed with a square groove segment that slides and adapts to the limiting part 1701, which can restrict the circumferential rotation of the locking pin 17. The end of the limiting part 1701 facing the rotating rod 16 extends to the outer side of the end of the locking pin 17. When the rotating rod 16 attracts the locking pin 17 by magnetic attraction, the limiting part 1701 can abut against the end face of the rotating rod 16 to limit the movement and prevent the first magnetic component 23 from having a hard collision with the second magnetic component 24.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for deburring weld seams of fitness steel pipes, characterized in that, include: A tool holder (4) is connected to the cantilever tool holder (1), and a scraper (6) and an upper support roller (5) are mounted on the top of the tool holder (4). A lifting rod (9) that can slide vertically relative to the tool holder (4) is provided in two sets. The bottom end of the lifting rod (9) is provided with a lower support roller (8), and the top end of the lifting rod (9) is sealed and extends into the first piston hole (402) of the tool holder (4). A second piston hole is connected to the first piston hole (402) and is arranged vertically. A transverse piston (13) is provided in the second piston hole. The transverse piston (13) is equipped with a connecting rod (20) via a telescopic assembly. The telescopic assembly can convert the horizontal movement of the transverse piston (13) into the circumferential rotation of the connecting rod (20). The rotating rod (16) is connected to the connecting rod (20) for transmission. Both ends of the rotating rod (16) are equipped with locking pins (17) that can engage with the lifting rod (9). After the rotating rod (16) rotates synchronously with the connecting rod (20), it can drive the locking pins (17) to approach or disengage from the lifting rod (9), so that the two sets of lifting rods (9) are locked alternately with the tool holder (4).

2. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The tool holder (4) is provided with a hydraulic flow channel (401) that communicates with the first piston hole (402).

3. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The top end of the lifting rod (9) is fixed with a longitudinal piston (12), which is located in the first piston hole (402).

4. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The lower support roller (8) is elastically connected to the knife holder (4) in the vertical direction.

5. The device for deburring weld seams of fitness steel pipes according to claim 2, characterized in that: The telescopic assembly includes a first connector (14) and a second connector (15). The first connector (14) is fixed to the transverse piston (13) and slides along the length of the cutter holder (4). The second connector (15) rotates with the connecting rod (20) through a one-way bearing. It also includes a guide (25) and a sloping groove (2601). One of the guide (25) and the sloping groove (2601) is located at the first joint (14) and the other is located at the second joint (15). During the relative movement of the first joint (14) and the second joint (15) along the axis of the connecting rod (20), the second joint (15) can be driven to rotate circumferentially through the sliding cooperation between the guide (25) and the sloping groove (2601).

6. The device for deburring weld seams of fitness steel pipes according to claim 5, characterized in that: The locking pin (17) and the rotating rod (16) are respectively fitted with multiple sets of first magnetic elements (23) and second magnetic elements (24). The first magnetic elements (23) and second magnetic elements (24) are evenly distributed and staggered along the circumference of the rotating rod (16), and the magnetic poles of the first magnetic elements (23) and second magnetic elements (24) are opposite to each other on their opposite end faces.

7. The device for deburring weld seams of a fitness steel pipe according to claim 5, characterized in that: One end of the inclined groove (2601) is connected to a straight groove (2602). The straight groove (2602) is arranged parallel to the axis of the rotating rod (16). When the guided member (25) slides from the inclined groove (2601) into the straight groove (2602), the second joint (15) is circumferentially locked.

8. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The connecting rod (20) and the rotating rod (16) are arranged in parallel and are connected by a transmission component (27), which is a belt or a gear set.

9. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The locking pin (17) is fixedly sleeved with a limiting part (1701) on the outside. The limiting part (1701) is set as a polygonal structure. The tool holder (4) is provided with a guide groove for installing the locking pin (17). The inner wall of the guide groove is provided with a square groove area that slides with the limiting part (1701). The end of the limiting part (1701) near the rotating rod (16) extends to the outside of the end of the locking pin (17).

10. The device for deburring weld seams of fitness steel pipes according to claim 1, characterized in that: The diameter of the first piston hole (402) is larger than the diameter of the second piston hole.

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