High frequency welded pipe inner doctor assembly

Abstract

The application discloses an inner scraping knife assembly of a high-frequency welded pipe and belongs to the technical field of welded pipes. The inner scraping knife assembly comprises a mounting rod, the outer circumferential surface of a guide wheel arranged at the upper end of the mounting rod is provided with a groove, the welding seam of a pipe passes through the groove, one end of the mounting rod is connected with a knife holder, an annular knife is arranged on the knife holder, the other end of the mounting rod is connected with a support, at least one magnetic bar is arranged on the support and located on the inner wall of the pipe and close to the welding seam, and the welding seam area will sequentially pass through the magnetic bar, the guide wheel and the annular knife. The support is further expanded, the support is used for mounting the magnetic bar, the functionality of the inner scraping knife assembly is improved, and the high-frequency welding process of the pipe is adapted.

Description

Technical Field

[0001] This application relates to the field of welded pipe technology, and in particular to an internal scraper assembly for a high-frequency welded pipe. Background Technology

[0002] In the production process of high-frequency welded pipes, weld removal is one of the key steps to ensure pipe quality. Weld beads or burrs will always remain on the inner and outer surfaces of the pipe fittings produced by high-frequency welding. In particular, the removal of internal burrs is more difficult because the pipe diameter limitation makes the removal process of internal burrs more complicated, thus limiting the application range of welded pipes.

[0003] Subsequently, corresponding cutting tools appeared on the market, such as the Chinese patent application "Weld Seam Internal Scraper" (application number: CN201520467925.7), which discloses a ring-shaped tool and a tool holder. The ring-shaped tool is fixed to the front end of the tool holder, and the axis of the ring-shaped tool is inclined to one side of the tool holder, with the angle between the axis of the ring-shaped tool and the vertical direction being 10-30 degrees. The tool holder is provided with a bracket that can adjust the height of the ring-shaped tool. The bracket includes a support arm and an adjusting screw. A receiving groove is opened on the lower bottom surface of the tool holder. The support arm is placed in the receiving groove and is pivotally connected to the tool holder through a pivot shaft. The adjusting screw is threaded to the upper surface of the tool holder on one side of the pivot shaft and extends into the receiving groove to abut against the support arm.

[0004] While existing high-frequency welding pipe scrapers can remove weld seams from the inner wall of circular pipes, they still have some shortcomings in practical applications. For example, the scraper's structure is fixed, lacks scalability, has limited functionality, and cannot be well adapted to high-frequency welding technology. Utility Model Content

[0005] The technical problem to be solved by this application is to provide an inner scraper assembly for high-frequency welded pipes, which further expands the support for mounting a magnetic rod, thereby improving the functionality of the inner scraper assembly and adapting it to the high-frequency welding process of pipe fittings.

[0006] The technical solution adopted in this application is as follows: an inner scraper assembly for a high-frequency welded pipe, including a mounting rod, a guide wheel mounted on the upper end of the mounting rod, and a support wheel adjustablely mounted on the lower end of the mounting rod. A groove is provided in the middle of the outer circumference of the guide wheel, and the weld of the pipe passes through the groove. One end of the mounting rod is connected to a tool holder, on which a ring-shaped tool is mounted. The other end of the mounting rod is connected to a bracket, on which at least one magnetic rod is mounted. The at least one magnetic rod is located on the inner wall of the pipe and close to the weld. The weld area will pass through the magnetic rod, the guide wheel, and the ring-shaped tool in sequence.

[0007] Compared with existing technologies, the advantages of this application are as follows: First, the internal scraper function in existing technologies is limited and cannot be well adapted to high-frequency welding technology. This application further adds a magnetic rod, which is correspondingly set in the high-frequency welding machine. The magnetic rod can enhance the concentration effect of high-frequency current, making the current more concentrated at the weld, optimizing the high-frequency welding process, and improving heating efficiency and welding quality. This not only makes the weld easier to remove in the subsequent process, reducing the mechanical force required to remove the weld, but also improves the weld removal effect, thereby improving the overall production efficiency. This effectively solves the problem of functional limitations in existing technologies, expands the function of the internal scraper assembly, and makes it better adapted to high-frequency welding technology.

[0008] Secondly, after passing the magnetic rod, the weld seam reaches the guide wheel. This application features a groove in the center of the outer circumference of the guide wheel. The weld beads generated during high-frequency welding then pass through this groove and are removed by the annular cutter. The groove on the guide wheel positions and guides the weld seam, allowing the subsequent annular cutter to precisely scrape away the weld beads from the inner wall of the pipe fitting. This ensures complete removal of the weld beads, reducing subsequent processing problems or quality defects caused by weld bead residue and improving the surface quality of the welded pipe fitting.

[0009] Finally, the synergistic effect of the support wheels and guide wheels makes the internal scraper assembly run more smoothly, reducing vibration and impact during operation. This stable operation helps reduce wear between various components. The split design of the mounting rod, blade holder, and support structure allows for partial disassembly and replacement, effectively extending the overall service life and reducing maintenance costs.

[0010] In this application, for ease of description and in light of actual production conditions, the weld seam of the pipe fitting is typically located on its top surface. Therefore, at least one magnetic rod must be positioned directly below the weld seam, and it is preferable to place the welding position directly above the magnetic rod. High-frequency welding is achieved through induction heating using high-frequency current. One of the main functions of the magnetic rod is to enhance the concentration effect of the high-frequency current, making the current more concentrated at the weld seam, thereby improving heating efficiency and weld quality.

[0011] In some embodiments of this application, the axis of the ring cutter is inclined to one side of the tool holder, and the angle between the axis of the ring cutter and the vertical direction is 10-30 degrees.

[0012] The small-angle tilt design allows the cutting edge of the ring cutter to better fit the inner wall of the pipe, increasing the contact area and contact angle between the cutter and the weld, thereby more effectively removing weld beads and ensuring that the weld is completely removed, improving the weld removal effect and the inner surface quality of the welded pipe.

[0013] In some embodiments of this application, the tool holder includes a connecting section and a mounting section, the included angle between the connecting section and the mounting section is an obtuse angle, the connecting section and the mounting rod are coaxially arranged, and the annular tool is locked in the mounting section.

[0014] This tool holder design better adapts to the shape of pipe fittings and welding positions, making the ring cutter more stable and accurate when removing welds. The obtuse angle design between the connecting section and the mounting section optimizes the tool's installation position and angle, improving tool efficiency and removal effect.

[0015] In some embodiments of this application, the top surface of the mounting section is provided with a stepped hole, which penetrates the top and bottom surfaces of the mounting section. The stepped hole includes a large hole section and a small hole section arranged coaxially, with the large hole section located above the small hole section. The axis of the stepped hole is perpendicular to the top surface of the mounting section.

[0016] The stepped hole design provides a stable mounting base for the ring cutter and a channel for the removal of weld beads. The larger hole section can accommodate the bottom of the ring cutter, while the smaller hole section guides the weld beads to exit smoothly, preventing weld beads from accumulating around the cutter, reducing cutter wear, and improving the stability and service life of the equipment.

[0017] In some embodiments of this application, the bottom of the annular cutter is embedded in the large hole section, the top of the annular cutter protrudes from the top surface of the mounting section, and the inner diameter of the annular cutter is less than or equal to the diameter of the small hole section.

[0018] The weld beads on the weld are cut by the annular cutter and fall into the cutter, then exit along the small hole section. This design allows the annular cutter to be securely mounted on the cutter holder while ensuring that the weld beads can smoothly pass through the annular cutter into the small hole section and be discharged. The inner diameter of the annular cutter is less than or equal to the diameter of the small hole section, which effectively guides the weld beads out, reduces interference with the cutter, and improves the weld removal effect.

[0019] In some embodiments of this application, the ring cutter is secured to a bolt-locked tool holder. This bolt-locking design makes the installation and removal of the ring cutter more convenient and quick, facilitating tool replacement and maintenance. This design improves equipment maintainability, reduces equipment downtime, and lowers maintenance costs.

[0020] In some embodiments of this application, at least two guide wheels are installed on the upper end of the mounting rod, with a gap between adjacent guide wheels, and the guide wheels are located on the side of the support wheel away from the tool holder or on both sides of the support wheel.

[0021] The design of at least two guide wheels better guides the weld seam through, reducing its offset and twisting during passage, ensuring the weld seam is directly aligned with the annular cutter, and improving the accuracy and stability of weld seam removal. The spacing between adjacent guide wheels can be adjusted according to the specific conditions of the weld seam, further optimizing the guiding effect.

[0022] In some embodiments of this application, the other end of the mounting rod is connected to the bracket via a connecting rod, the bracket and the connecting rod are coaxially arranged, and the connecting rod and the mounting rod are coaxially arranged.

[0023] This coaxial design makes the entire internal scraper assembly more compact and stable, reducing vibration and impact during operation and improving operating efficiency and service life. At the same time, the coaxial design facilitates installation and adjustment, enhancing the equipment's operability.

[0024] In some embodiments of this application, the bracket is a cylindrical structure, sleeved on the outside of the connecting rod, with multiple magnetic rods arranged around the outer periphery of the connecting rod. The axial direction of the magnetic rods is parallel to the axial direction of the bracket, and all the magnetic rods are mounted on the bracket.

[0025] The cylindrical support structure and multiple surrounding magnetic rods enhance the concentration effect of high-frequency current, making the current more concentrated at the weld seam, thus improving welding efficiency and quality. This design is suitable for pipes with large inner diameters and allows for the arrangement of multiple magnetic rods to further optimize the welding process.

[0026] In some embodiments of this application, the top surface of the bracket is provided with an axially oriented mounting groove, a magnetic rod is embedded in the mounting groove, and part of the magnetic rod extends out of the mounting groove. The bottom surface of the bracket is regularly provided with a row of through holes.

[0027] The mounting slot design allows the magnetic rod to be securely mounted on the bracket, while the portion of the magnetic rod extending beyond the mounting slot better enhances its function of concentrating high-frequency current. This design is suitable for mounting a single magnetic rod and can accommodate fittings with small diameters.

[0028] In this application, the connection structure of the support wheel is similar to that of the prior art, and will not be described in detail here.

[0029] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0030] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0031] Figure 1 This is a structural diagram of Scheme 1 of this application. Figure 1 ; Figure 2 This is a structural diagram of Scheme 1 of this application. Figure 2 ; Figure 3 This is a sectional view of Scheme 1 of this application; Figure 4 This is a structural diagram of Scheme 2 in this application. Figure 1 ; Figure 5 This is a structural diagram of Scheme 2 in this application. Figure 2 ; Figure 6 This is a cross-sectional view of Scheme 2 of this application.

[0032] The specific annotations in the attached drawings are as follows: 1. Mounting rod; 2. Guide wheel; 3. Support wheel; 4. Groove; 5. Tool holder; 6. Ring cutter; 7. Bracket; 8. Magnetic rod; 9. Connecting section; 10. Mounting section; 11. Stepped hole; 11a. Large hole section; 11b. Small hole section; 12. Bolt; 13. Connecting rod; 14. Mounting groove; 15. Through hole; 16. Pipe fitting. Detailed Implementation

[0033] The present application will now be described in detail with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] The inner scraper assembly of the high-frequency welded pipe, as described in Example 1. Figure 1 As shown: The device includes a mounting rod 1, with a guide wheel 2 mounted on its upper end and a support wheel 3 adjustablely mounted on its lower end. The synergistic effect of the support wheel 3 and the guide wheel 2 makes the internal scraper assembly run more smoothly, reducing vibration and impact during operation. This smooth operation helps reduce wear between the various components. The split design of the mounting rod 1, blade holder 5, and bracket 7 allows for partial disassembly and replacement, effectively extending the overall service life and reducing maintenance costs.

[0036] A groove 4 is provided in the middle of the outer circumference of the guide wheel 2. The weld seam of the pipe fitting passes through the groove 4, and the weld beads generated by high-frequency welding will pass through the groove 4 and then be removed by the annular cutter 6. The groove 4 of the guide wheel 2 plays a positioning and guiding role for the weld seam, so that the subsequent annular cutter 6 can accurately scrape off the weld beads on the inner wall of the pipe fitting 16, ensuring that the weld beads are completely removed, reducing subsequent processing problems or quality defects caused by weld bead residue, and improving the surface quality of the welded pipe fitting 16.

[0037] One end of the mounting rod 1 is connected to a tool holder 5, on which a ring-shaped cutter 6 is mounted. The other end of the mounting rod 1 is connected to a bracket 7, on which at least one magnetic rod 8 is mounted. The magnetic rod 8 is located on the inner wall of the pipe fitting and close to the weld. The weld area will pass through the magnetic rod 8, the guide wheel 2, and the ring-shaped cutter 6 in sequence. This application further adds a magnetic rod 8, and the weld first passes through the magnetic rod 8 located on its inner wall. The magnetic rod 8 can enhance the concentration effect of the high-frequency current, making the current more concentrated at the weld, optimizing the high-frequency welding process, and improving heating efficiency and welding quality. This not only makes the weld easier to remove in the subsequent process and reduces the mechanical force required to remove the weld, but also improves the weld removal effect, thereby improving the overall production efficiency, effectively solving the problem of functional limitations in the prior art, expanding the function of the inner scraper assembly, and enabling it to better adapt to high-frequency welding technology.

[0038] In this application, for ease of description and in light of actual production conditions, the weld seam of the pipe fitting 16 is typically located on its top surface. Therefore, at least one magnetic rod 8 is positioned directly below the weld seam, and it is preferable to position the welding operation directly above the magnetic rod 8. High-frequency welding is achieved through induction heating using high-frequency current. One of the main functions of the magnetic rod 8 is to enhance the concentration effect of the high-frequency current, making the current more concentrated at the weld seam, thereby improving heating efficiency and welding quality.

[0039] In this application, the connection structure of the support wheel 3 is similar to that of the prior art, and will not be described in detail here.

[0040] Example 2, as Figures 1 to 3 As shown, the axis of the annular cutter 6 is inclined to one side of the cutter holder 5, and the angle between the axis of the annular cutter 6 and the vertical direction is 10-30 degrees. The small-angle inclination design allows the cutting edge of the annular cutter 6 to better fit the inner wall of the pipe fitting 16, increasing the contact area and contact angle between the cutter and the weld, thereby more effectively removing weld beads from the weld, ensuring that the weld is completely removed, and improving the weld removal effect and the inner surface quality of the welded pipe fitting 16.

[0041] The tool holder 5 includes a connecting section 9 and a mounting section 10, with an obtuse angle between them. The connecting section 9 and the mounting rod 1 are coaxially arranged, and the annular cutter 6 is locked to the mounting section 10. This structural design of the tool holder 5 can better adapt to the shape and welding position of the pipe fitting 16, making the annular cutter 6 more stable and accurate when removing welds. The obtuse angle design between the connecting section 9 and the mounting section 10 can optimize the installation position and angle of the cutter, improving the efficiency and removal effect of the cutter.

[0042] The top surface of the mounting section 10 has a stepped hole 11 that penetrates both the top and bottom surfaces of the mounting section 10. The stepped hole 11 includes a large hole section 11a and a small hole section 11b arranged coaxially, with the large hole section 11a located above the small hole section 11b. The axis of the stepped hole 11 is perpendicular to the top surface of the mounting section 10. The stepped hole 11 provides a stable mounting base for the annular cutter 6 and also provides a channel for the removal of weld beads. The large hole section 11a can accommodate the bottom of the annular cutter 6, while the small hole section 11b guides the weld beads to exit smoothly, preventing weld beads from accumulating around the cutter, reducing cutter wear, and improving the stability and service life of the equipment.

[0043] The bottom of the annular cutter 6 is embedded in the large-hole section 11a, and the top of the annular cutter 6 protrudes from the top surface of the mounting section 10. The inner diameter of the annular cutter 6 is less than or equal to the diameter of the small-hole section 11b. Weld beads on the weld are cut by the annular cutter 6, fall into the annular cutter 6, and are then discharged along the small-hole section 11b. This design allows the annular cutter 6 to be securely mounted on the tool holder 5, while ensuring that the weld beads can smoothly pass through the annular cutter 6 into the small-hole section 11b and be discharged. The fact that the inner diameter of the annular cutter 6 is less than or equal to the diameter of the small-hole section 11b effectively guides the weld beads out, reduces interference with the tool, and improves the weld removal effect.

[0044] The ring cutter 6 is locked to the tool holder 5 by bolts 12. The bolt 12 locking design makes the installation and removal of the ring cutter 6 more convenient and quick, facilitating tool replacement and maintenance. This design improves the maintainability of the equipment, reduces downtime, and lowers maintenance costs.

[0045] At least two guide wheels 2 are mounted on the upper end of the mounting rod 1. There is a gap between adjacent guide wheels 2. The guide wheels 2 are located on the side of the support wheel 3 away from the tool holder 5 or on both sides of the support wheel 3. The design of at least two guide wheels 2 can better guide the weld seam through, reduce weld seam offset and twisting during passage, and ensure that the weld seam is directly aligned with the annular tool 6, improving the accuracy and stability of weld seam removal. The gap between adjacent guide wheels 2 can be adjusted according to the specific conditions of the weld seam to further optimize the guiding effect.

[0046] The other end of the mounting rod 1 is connected to the bracket 7 via a connecting rod 13. The bracket 7 and the connecting rod 13 are coaxially arranged, and the connecting rod 13 and the mounting rod 1 are coaxially arranged. This coaxial design makes the entire internal scraper assembly more compact and stable, reduces vibration and impact during operation, and improves the operating efficiency and service life of the equipment. At the same time, the coaxial arrangement also facilitates the installation and adjustment of the equipment, improving its operability.

[0047] The support 7 is a cylindrical structure, sleeved around the connecting rod 13. Multiple magnetic rods 8 are arranged around the outer periphery of the connecting rod 13, with the axial direction of the magnetic rods 8 parallel to the axial direction of the support 7. All the magnetic rods 8 are mounted on the support 7. The cylindrical structure of the support 7 and the surrounding magnetic rods 8 can better enhance the concentration effect of high-frequency current, making the current more concentrated at the weld, thus improving welding efficiency and quality. This design is suitable for cases where the inner diameter of the pipe fitting 16 is large, allowing for the arrangement of multiple magnetic rods 8 to further optimize the welding process.

[0048] The rest of the contents of Example 2 are the same as those of Example 1.

[0049] Example 3, as Figures 4 to 6 As shown, the other contents of Embodiment 3 are the same as those of Embodiment 2, except that: the top surface of the bracket 7 has an axially oriented mounting groove 14, and a magnetic rod 8 is embedded in the mounting groove 14, with part of the magnetic rod 8 extending out of the mounting groove 14; the bottom surface of the bracket 7 has a row of through holes 15 regularly arranged. The design of the mounting groove 14 allows the magnetic rod 8 to be firmly installed on the bracket 7, and the fact that part of the magnetic rod 8 extends out of the mounting groove 14 can better exert its function of enhancing the concentration of high-frequency current. This design is suitable for the installation of a single magnetic rod 8 and can be matched with cases where the diameter of the tube 16 is small.

[0050] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An inner scraper assembly for a high-frequency welded pipe, characterized in that, The fitting includes an installation rod (1), with a guide wheel (2) installed at the upper end of the installation rod (1) and a support wheel (3) adjustablely installed at the lower end of the installation rod (1). A groove (4) is provided in the middle of the outer circumference of the guide wheel (2), and the weld of the fitting passes through the groove (4). One end of the installation rod (1) is connected to a tool holder (5), and a ring cutter (6) is installed on the tool holder (5). The other end of the installation rod (1) is connected to a bracket (7), and at least one magnetic rod (8) is installed on the bracket (7). The at least one magnetic rod (8) is located on the inner wall of the fitting and close to the weld. The weld area will pass through the magnetic rod (8), the guide wheel (2), and the ring cutter (6) in sequence.

2. The inner scraper assembly for high-frequency welded pipe according to claim 1, characterized in that, The axis of the ring cutter (6) is inclined to one side of the tool holder (5), and the angle between the axis of the ring cutter (6) and the vertical direction is 10-30 degrees.

3. The inner scraper assembly for high-frequency welded pipe according to claim 1, characterized in that, The tool holder (5) includes a connecting section (9) and a mounting section (10). The included angle between the connecting section (9) and the mounting section (10) is an obtuse angle. The connecting section (9) and the mounting rod (1) are coaxially arranged. The ring cutter (6) is locked in the mounting section (10).

4. The inner scraper assembly for high-frequency welded pipe according to claim 3, characterized in that, The top surface of the mounting section (10) is provided with a stepped hole (11), which penetrates the top and bottom surfaces of the mounting section (10). The stepped hole (11) includes a large hole section (11a) and a small hole section (11b) arranged coaxially. The large hole section (11a) is located above the small hole section (11b), and the axis of the stepped hole (11) is perpendicular to the top surface of the mounting section (10).

5. The inner scraper assembly for a high-frequency welded pipe according to claim 4, characterized in that, The bottom of the ring cutter (6) is embedded in the large hole section (11a), and the top of the ring cutter (6) protrudes from the top surface of the mounting section (10). The inner diameter of the ring cutter (6) is less than or equal to the diameter of the small hole section (11b).

6. The inner scraper assembly for high-frequency welded pipe according to claim 1, characterized in that, The ring cutter (6) is locked to the tool holder (5) by bolts (12).

7. The inner scraper assembly for high-frequency welded pipe according to claim 1, characterized in that, At least two guide wheels (2) are installed on the upper end of the mounting rod (1). There is a gap between two adjacent guide wheels (2). The guide wheels (2) are located on the side of the support wheel (3) away from the tool holder (5) or on both sides of the support wheel (3).

8. The inner scraper assembly for high-frequency welded pipe according to claim 1, characterized in that, The other end of the mounting rod (1) is connected to the bracket (7) via the connecting rod (13). The bracket (7) and the connecting rod (13) are coaxially arranged. The connecting rod (13) and the mounting rod (1) are coaxially arranged.

9. The inner scraper assembly for a high-frequency welded pipe according to claim 8, characterized in that, The bracket (7) is a cylindrical structure. The bracket (7) is sleeved on the outside of the connecting rod (13). Multiple magnetic rods (8) are arranged around the outer periphery of the connecting rod (13). The axial direction of the magnetic rods (8) is parallel to the axial direction of the bracket (7). All the magnetic rods (8) are installed on the bracket (7).

10. The inner scraper assembly for a high-frequency welded pipe according to claim 8, characterized in that, The top surface of the bracket (7) is provided with an axially oriented mounting groove (14), and a magnetic rod (8) is embedded in the mounting groove (14). Part of the magnetic rod (8) extends out of the mounting groove (14). A row of through holes (15) is regularly arranged on the bottom surface of the bracket (7).

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