An inner chamfering device for processing PVC pipe with steel skeleton sealing ring

Abstract

This utility model relates to the field of pipe internal chamfering technology, and particularly to an internal chamfering device for processing PVC pipes with steel-reinforced sealing rings. It includes a pipe clamping and rotating mechanism and a worktable. The worktable is equipped with a horizontal base and a horizontal displacement mechanism. A vertical base and a lifting mechanism are mounted on the horizontal base. A drive motor is mounted on the vertical base. The output shaft of the drive motor drives and connects to a chamfering cutter. A limiter mounting seat is fixedly connected to the front end of the drive motor. The bottom of the limiter mounting seat has an opening, and the front end of the limiter mounting seat has a through hole. A support shaft is installed in the through hole. A circumferential limiter is fixedly connected to one end of the support shaft near the chamfering cutter, and the circumferential limiter is positioned directly opposite the chamfering cutter. A locking nut is threaded to the other end of the support shaft. An axial limiter is fixedly connected to the front end of the drive motor near the opening. This utility model can precisely limit the processing position and depth of the chamfering cutter, ensuring stable and uniform chamfer dimensions.

Description

Technical Field

[0001] This utility model relates to the field of pipe internal chamfering technology, and more specifically to an internal chamfering device for processing PVC pipes with steel-framed sealing rings. Background Technology

[0002] During the construction and installation of polyvinyl chloride (PVC) pipes, ordinary flexible rubber sealing rings are mainly used for socket connections. However, due to differences in the hardness, size, and structure of the sealing ring material, displacement of the socket rubber ring and leakage are prone to occur. At the same time, the sealing ring may also suffer from stress cracking due to long-term compression, especially in medium and large diameter, high-pressure pipelines, where such problems are more prominent.

[0003] The new type of PVC pipe uses a sealing ring with a steel skeleton support at the socket connection. The steel skeleton increases strength and improves the sealing ring's resistance to deformation, ensuring it is more reliably fixed within the socket. This prevents excessive local gaps caused by eccentricity during insertion and removal, which could lead to insufficient circumferential stress and displacement of the rubber ring. This technology employs a special one-piece molding process in the pipe socket manufacturing process. Using specialized equipment and molds, the steel skeleton sealing ring is embedded into the pipe socket after secondary heating of the pipe end, followed by cooling and shaping. This achieves excellent integrity between the steel skeleton sealing ring and the pipe, effectively maintaining the sealing performance of the pipe connection.

[0004] In the production process of PVC pipes with integrated steel skeleton sealing rings, chamfering the 90-degree angle between the socket end and the inner wall is an essential and crucial step. The chamfering range is approximately 30% of the pipe wall thickness. Its main function is to ensure that the heated and softened pipe end can be smoothly pushed into the mold during the subsequent installation of the steel skeleton sealing ring, avoiding jamming or stacking due to contact between the inner wall and the sealing ring and the diameter expansion, which could damage the processed product.

[0005] Currently, achieving stable and uniform dimensions for the inner wall chamfer is crucial for ensuring the quality of the entire socket processing and represents a core technical challenge in this process. Existing chamfering devices may suffer from issues such as inconvenient chamfer dimension adjustment, low processing accuracy, and insufficient structural stability during processing, leading to difficulties in guaranteeing chamfer quality and affecting the processing quality of the pipe socket and the subsequent installation effect of the steel skeleton sealing ring. Utility Model Content

[0006] The purpose of this invention is to provide an internal chamfering device for processing PVC pipes with steel-framed sealing rings, ensuring stable and uniform chamfer dimensions, and effectively solving the problems of inconvenient chamfer dimension adjustment and low processing accuracy in the prior art.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] An internal chamfering device for processing PVC pipes with steel-reinforced sealing rings includes a pipe clamping and rotating mechanism and a worktable. The worktable has a horizontal base and a horizontal displacement mechanism for driving the horizontal base to move horizontally. The horizontal base has a vertical base and a lifting mechanism for driving the vertical base to rise and fall. A drive motor is mounted on the vertical base. The output shaft of the drive motor drives a chamfering cutter. A limiter mounting seat is fixedly connected to the front end of the drive motor. The limiter mounting seat surrounds the chamfering cutter. The bottom of the limiter mounting seat has an opening, and the front end of the limiter mounting seat has a through hole. A support shaft is installed in the through hole. A circumferential limiter is fixedly connected to one end of the support shaft near the chamfering cutter, and the circumferential limiter faces the chamfering cutter. A locking nut is threaded to the other end of the support shaft. An axial limiter is fixedly connected to the front end of the drive motor near the opening.

[0009] Furthermore, the horizontal displacement mechanism includes a horizontal feed cylinder mounted on the workbench and two parallel horizontal linear guide rails. The horizontal base is slidably connected to the two horizontal linear guide rails, and the telescopic rod of the horizontal feed cylinder is driven to connect to the horizontal base.

[0010] Furthermore, the lifting mechanism includes two vertical guide rails that are vertically fixedly connected to one side of the horizontal base. A cylinder mounting seat is fixedly connected to the top of the two vertical guide rails. A vertical feed cylinder is mounted on the cylinder mounting seat. The vertical base is slidably connected to the vertical guide rails. The telescopic rod of the vertical feed cylinder drives the vertical base.

[0011] Furthermore, the top of the limiter mounting base is provided with an adjustment groove that communicates with the through hole. A circumferential limiting locking rod is rotatably connected in the adjustment groove. The bottom of the circumferential limiting locking rod abuts against the side wall of the support shaft. The support shaft and the through hole are fitted with a clearance.

[0012] Furthermore, the top of the limiter mounting base is provided with a dust removal interface, which is positioned directly opposite the chamfering blade.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention uses circumferential and axial limiters to precisely limit the processing position and depth of the chamfering cutter. The circumferential and axial limiters control the relative position of the chamfering cutter and the pipe, ensuring stable and uniform chamfer dimensions, effectively solving the problems of inconvenient chamfer dimension adjustment and low processing accuracy in existing technologies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.Figure One ;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure Two .

[0017] 1. Worktable; 2. Horizontal base; 3. Vertical base; 4. Drive motor; 5. Chamfering tool; 6. Limiter mounting base; 601. Through hole; 602. Adjustment groove; 603. Dust removal interface; 7. Support shaft; 8. Circumferential limiter; 9. Locking nut; 10. Axial limiter; 11. Horizontal feed cylinder; 12. Horizontal linear guide; 13. Vertical guide; 14. Cylinder mounting base; 15. Vertical feed cylinder; 16. Circumferential limit locking rod; 17. Pipe. Detailed Implementation

[0018] like Figure 1 and Figure 2 As shown, an internal chamfering device for processing PVC pipes with steel-reinforced sealing rings includes a pipe clamping and rotating mechanism and a worktable 1. The worktable 1 has a horizontal base 2 and a horizontal displacement mechanism for driving the horizontal base 2 to move horizontally. The horizontal base 2 has a vertical base 3 and a lifting mechanism for driving the vertical base 3 to rise and fall. A drive motor 4 is mounted on the vertical base 3. The output shaft of the drive motor 4 is connected to a chamfering blade 5. A limiter mounting seat 6 is fixedly connected to the front end of the drive motor 4. The limiter mounting seat 6 surrounds the chamfering blade 5 and has an opening at its bottom. A through hole 601 is opened at the front end of the limiter mounting seat 6. A support shaft 7 is provided inside the through hole 601. A circumferential limiter 8 is fixedly connected to one end of the support shaft 7 near the chamfering blade 5. The circumferential limiter 8 is positioned directly opposite the chamfering blade 5. A locking nut 9 is threaded to the other end of the support shaft 7. An axial limiter 10 is fixedly connected to the front end of the drive motor 4 near the opening.

[0019] The horizontal displacement mechanism includes a horizontal feed cylinder 11 mounted on the worktable 1 and two parallel horizontal linear guide rails 12. The horizontal base 2 is slidably connected to the two horizontal linear guide rails 12, and the telescopic rod of the horizontal feed cylinder 11 is driven to connect to the horizontal base 2.

[0020] The lifting mechanism includes two vertical guide rails 13 that are vertically fixedly connected to one side of the horizontal base 2. A cylinder mounting seat 14 is fixedly connected to the top of the two vertical guide rails 13. A vertical feed cylinder 15 is installed on the cylinder mounting seat 14. The vertical base 3 is slidably connected to the vertical guide rails 13. The telescopic rod of the vertical feed cylinder 15 drives the vertical base 3.

[0021] The top of the limiter mounting base 6 is provided with an adjustment groove 602 that communicates with the through hole 601. A circumferential limiting locking rod 16 is rotatably connected in the adjustment groove 602. The bottom of the circumferential limiting locking rod 16 abuts against the side wall of the support shaft 7. The support shaft 7 and the through hole 601 are fitted with a clearance.

[0022] The top of the limiter mounting base 6 is provided with a dust removal interface 603, which is positioned directly opposite the chamfering cutter 5. During the chamfering process, the cutting debris can be collected and recycled by connecting an external centrifugal fan dust removal device during the chamfering milling operation, avoiding the accumulation of debris and dust in the processing area. This not only improves the processing quality but also improves the working environment, protects the health of operators, and reduces the risk of equipment damage due to dust ingress.

[0023] Working principle:

[0024] The pipe 17 to be processed is fixed by the pipe clamping and rotating mechanism. The horizontal feed cylinder 11 in the horizontal displacement mechanism pushes the horizontal machine base 2 to slide on the horizontal linear guide rail 12 until the axial limiter 11 touches the end of the pipe 17 and stops moving forward. The vertical feed cylinder 15 in the lifting mechanism drives the vertical machine base 3 to rise and fall on the vertical guide rail 13 until the circumferential limiter 8 abuts against the inner wall of the pipe. At this time, the drive motor 4 drives the chamfering cutter 5 to mill the end of the pipe 17. After the pipe clamping and rotating mechanism drives the pipe 17 to rotate one revolution, the inner wall chamfering is completed. The vertical feed cylinder 15 and the horizontal feed cylinder 11 are reset, and the drive motor 4 stops.

[0025] When adjusting the chamfer size, rotate the circumferential locking rod 16 to change its tightness against the support shaft 7. This changes the relative position of the circumferential limiter 8 and the chamfering cutter 5. For example, increasing the tightness of the circumferential locking rod 16 against the support shaft 7 lowers the bottom of the circumferential limiter 8 relative to the chamfering cutter 5, moving it closer to the inner wall of the pipe 17. This reduces the circumferential processing range of the chamfering cutter 5, resulting in a smaller chamfer size. Conversely, decreasing the tightness of the circumferential locking rod 16 against the support shaft 7 moves the circumferential limiter 8 away from the inner wall of the pipe 17, increasing the chamfer size. In this way, the chamfer size can be precisely adjusted according to actual processing requirements.

[0026] This device utilizes a combination of a horizontal displacement mechanism and a lifting mechanism. A horizontal feed cylinder 11 pushes a horizontal base 2 to slide along a horizontal linear guide rail 12. The axial limiter 10 stops after contacting the end of the pipe 17, precisely determining the device's horizontal position. A vertical feed cylinder 15 drives a vertical base 3 to rise and fall along a vertical guide rail 13 until the circumferential limiter 8 abuts against the inner wall of the pipe 17, determining the vertical position. This multi-mechanism collaborative positioning method ensures that the chamfering cutter 5 accurately reaches the predetermined position at the end of the pipe 17 during each processing step, providing a foundation for stable chamfer dimensions. The axial limiter 10 and the circumferential limiter 8 position the chamfering cutter 5 relative to the pipe 17, ensuring the uniformity of the chamfer dimensions.

[0027] By adjusting the position of the circumferential limiter 8 through the circumferential limit locking rod 16, the processing range of the chamfering cutter 5 in the circumferential direction can be precisely controlled, enabling the device to meet the processing requirements of different specifications of pipes and different chamfering dimensions, thus improving the versatility and applicability of the equipment.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An internal chamfering device for processing PVC pipes with steel-reinforced sealing rings, comprising a pipe clamping and rotating mechanism, characterized in that: It also includes a workbench (1), on which a horizontal base (2) and a horizontal displacement mechanism for driving the horizontal base (2) to move horizontally are provided. A vertical base (3) and a lifting mechanism for driving the vertical base (3) to rise and fall are provided on the horizontal base (2). A drive motor (4) is mounted on the vertical base (3). The output shaft of the drive motor (4) is connected to a chamfering cutter (5). A limiter mounting base (6) is fixedly connected to the front end of the drive motor (4). The limiter mounting base (6) surrounds the chamfering cutter (5). 5) The bottom of the limiter mounting base (6) is provided with an opening, and the front end of the limiter mounting base (6) is provided with a through hole (601). A support shaft (7) is provided in the through hole (601). A circumferential limiter (8) is fixedly connected to one end of the support shaft (7) near the chamfering knife (5). The circumferential limiter (8) is set directly opposite the chamfering knife (5). A locking nut (9) is threaded to the other end of the support shaft (7). An axial limiter (10) is fixedly connected to the front end of the drive motor (4) near the opening.

2. The inner chamfering device for processing PVC pipes with steel-reinforced sealing rings as described in claim 1, characterized in that: The horizontal displacement mechanism includes a horizontal feed cylinder (11) mounted on the workbench (1) and two parallel horizontal linear guide rails (12). The horizontal base (2) is slidably connected to the two horizontal linear guide rails (12). The telescopic rod of the horizontal feed cylinder (11) is driven to connect to the horizontal base (2).

3. The inner chamfering device for processing PVC pipes with steel-reinforced sealing rings as described in claim 1, characterized in that: The lifting mechanism includes two vertical guide rails (13) that are vertically fixedly connected to one side of the horizontal base (2). A cylinder mounting seat (14) is fixedly connected to the top of the two vertical guide rails (13). A vertical feed cylinder (15) is installed on the cylinder mounting seat (14). The vertical base (3) is slidably connected to the vertical guide rails (13). The telescopic rod of the vertical feed cylinder (15) is driven to connect to the vertical base (3).

4. The inner chamfering device for processing PVC pipes with steel-reinforced sealing rings as described in claim 1, characterized in that: The top of the limiter mounting base (6) is provided with an adjustment groove (602) that connects to the through hole (601). A circumferential limiting locking rod (16) is rotatably connected in the adjustment groove (602). The bottom of the circumferential limiting locking rod (16) abuts against the side wall of the support shaft (7). The support shaft (7) and the through hole (601) are in clearance fit.

5. The inner chamfering device for processing PVC pipes with steel-reinforced sealing rings as described in claim 4, characterized in that: The top of the limiter mounting base (6) is provided with a dust removal port (603), which is positioned directly opposite the chamfering knife (5).

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