A center positioning device for circular pipe machining and a method of using the same

Abstract

The application provides a center positioning device for circular pipeline machining and a use method thereof, and belongs to the technical field of pipeline machining positioning, and comprises a device base, the upper end of the device base is provided with base guide rails on both sides along the length direction, two groups of sliding supports one are slidingly arranged on the upper end of the base guide rails close to both sides, a translation drive for driving the sliding supports one to slide horizontally is arranged on the device base, a sliding support two is slidingly arranged on the middle part of the upper end of the base guide rails, and connecting supports are fixedly arranged at both ends of the sliding support two; the sliding support one is provided with a center positioning assembly for center positioning of the pipeline, and the sliding support one is provided with a lifting adjusting assembly for adjusting the height of the center positioning assembly; the center positioning assembly, the lifting adjusting assembly, the clamping mechanism and the supporting mechanism are integrated, and the accurate alignment of the geometric center of the pipeline is realized.

Description

Technical Field

[0001] This invention belongs to the field of pipeline processing and positioning technology, specifically a center positioning device for processing circular pipelines and its usage method. Background Technology

[0002] During the production, transportation, and installation of pipes, precise positioning of their geometric center is often required for subsequent processes such as cutting, alignment, welding, and inspection. In pipe processing and construction scenarios, pipes are typically placed horizontally in an overhead or supported manner, making accurate acquisition of their center point crucial for ensuring process precision and construction quality. Current technologies often rely on manual measurement or fixed clamps for pipe center positioning, which is cumbersome and prone to human error affecting positioning accuracy. When dealing with pipes of different diameters, traditional positioning devices are difficult to adapt quickly, often requiring replacement of specialized components or complex adjustments, leading to low work efficiency. Furthermore, pipes are prone to axial offset or radial sway during positioning, affecting the stability of the center point coordinates and failing to meet high-precision processing requirements. Regarding the coordinated positioning of the inner and outer walls of the pipe, existing methods lack an effective linkage adjustment mechanism, failing to simultaneously achieve precise alignment and overall fixation of both ends of the pipe, thus hindering the implementation of subsequent automated processing flows. Summary of the Invention

[0003] The purpose of this application is to provide a center positioning device and method for processing circular pipes, which solves the problems of insufficient positioning accuracy, poor adaptability and poor stability during processing in the existing technology when accurately positioning the center point of the pipe and adapting to pipes of different specifications.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a center positioning device for processing circular pipes, including a device base, a base guide rail is provided on both sides of the upper end of the device base along the length direction, two sets of sliding supports are slidably arranged on the upper end of the base guide rail near the two sides, and a translation drive for driving the sliding supports to slide horizontally is provided on the device base, a second sliding support is slidably arranged in the middle of the upper end of the base guide rail, and a connecting support is fixedly arranged at both ends of the second sliding support. The sliding support is provided with a center positioning component for positioning the center of the pipeline, and the sliding support is provided with a lifting adjustment component for adjusting the height of the center positioning component. The sliding support 2 is provided with two sets of clamping mechanisms for clamping the upper part of the pipe, and the sliding support 2 is provided with a clamping drive assembly for adjusting the relative distance between the two sets of clamping mechanisms, which is suitable for clamping pipes of different specifications. The connecting support is provided with a support mechanism for supporting the bottom of the pipe; the clamping drive assembly includes a translation motor fixedly installed at one end of the sliding support, a translation gear fixedly installed on the output shaft of the translation motor, and a base rack fixedly installed on the side wall of the base guide rail, which meshes with the translation gear. The clamping mechanism and the support mechanism are driven to adjust their positions along the length direction through the meshing transmission of the gear and rack, so as to achieve stable support and clamping of the pipe. The central positioning component includes a positioning sleeve with a central shaft hole. Multiple T-shaped grooves arranged in a circular array are provided on the outer periphery of the positioning sleeve. A driving sleeve is slidably mounted on the outer periphery of the positioning sleeve. A connecting rod one is rotatably connected to the side of the T-shaped groove away from the lifting and adjusting component. A connecting rod two is rotatably connected to the driving sleeve. A pressing block for pressing against the inner wall of the pipe is rotatably connected to the ends of connecting rod one and connecting rod two away from the positioning sleeve. A connecting end plate is detachably mounted on the end of the positioning sleeve away from the lifting and adjusting component, and an electric push rod for driving the driving sleeve to slide is mounted on the connecting end plate.

[0005] Preferably, the lifting adjustment assembly includes a lifting base fixedly installed on the upper end of a sliding support, a vertical lifting groove is provided on the lifting base, a lifting guide groove is provided on the side wall of the lifting groove, a lifting sliding seat is slidably installed at the lifting groove, lifting guide blocks are fixedly provided at both ends of the lifting sliding seat and are slidably connected to the lifting guide groove, and the center positioning assembly is fixedly installed on the lifting sliding seat.

[0006] Preferably, a motor plate is detachably and fixedly installed on the upper end of the lifting base, a lifting screw is rotatably installed at the lifting groove, the lifting sliding seat is threadedly connected to the lifting screw, and a lifting motor for driving the lifting screw to rotate is fixedly installed on the motor plate.

[0007] Preferably, the bottom of the T-shaped slide groove is provided with a connecting through groove that connects to the shaft hole of the sleeve seat. A positioning push plate is slidably disposed in the shaft hole of the sleeve seat. The positioning push plate is fixedly connected to the output end of the electric push rod. Multiple push plate slots are provided on the outer periphery of the positioning push plate. A push plate insert is slidably inserted into the push plate slot. The push plate insert is detachably connected to the drive slide sleeve through the connecting through groove.

[0008] Preferably, the driving sleeve includes a sliding sleeve that is slidably sleeved on the outer periphery of the positioning sleeve, and a T-shaped slider that slides and engages with a T-shaped groove on the inner periphery of the sliding sleeve. The second connecting rod is rotatably connected to the T-shaped slider. The end of the sliding sleeve away from the second connecting rod is provided with an insertion groove that engages with the push plate.

[0009] Preferably: a plate stop is slidably connected through the side wall of the insertion slot; the upper part of the push plate is provided with a plate groove that slidably engages with the plate stop; a stop connecting plate is fixedly connected to the side of the plate stop away from the insertion slot; a connecting plate guide rod is slidably connected through the stop connecting plate; one end of the connecting plate guide rod is fixedly connected to the sliding sleeve; a plate spring is sleeved on the outer periphery of the connecting plate guide rod; one end of the plate spring is fixedly connected to the sliding sleeve; and the other end of the plate spring is fixedly connected to the stop connecting plate. When assembling the center positioning component, first install the positioning push plate on the output end of the electric push rod, then fix the electric push rod to the end of the positioning sleeve through the connecting end plate. Next, insert multiple sets of push plate inserts through the connecting slots into the push plate slots. After the push plate inserts are inserted, slide the drive sleeve from the side of the positioning sleeve closest to the connecting end plate onto the outside of the positioning sleeve. Before inserting the drive sleeve into the positioning sleeve, install the second connecting rod at the T-shaped slider. When the drive sleeve slides along the T-shaped groove onto the outer periphery of the positioning sleeve, the portion of the push plate extending out of the positioning sleeve inserts into the insertion slot. Simultaneously with insertion into the insertion slot, the push plate... The two sides of the insert plate are squeezed and the insert plate springs cause the insert plate blocks on both sides to insert into the insert plate slots, completing the limiting and locking connection of the push plate insert and the drive sleeve. Then, the first connecting rod is rotated and installed at the end of the T-shaped slide. Finally, the top pressure block is installed on the first and second connecting rods. The positioning push plate is moved by the electric push rod, and the drive sleeve is moved synchronously under the linkage of the push plate insert to complete the radial extension and retraction of the top pressure block. It is suitable for the center top pressure positioning of pipes with different diameters. The detachable center positioning component can be quickly disassembled and assembled, and different parts can be quickly replaced for flexible adaptation according to different pipe specifications.

[0010] Preferably, the clamping drive assembly further includes two sets of clamping guide rails and two sets of clamping uprights fixedly disposed on the upper end of the sliding support. Two sets of guide rail sliders are slidably disposed on the clamping guide rails, and the two clamping mechanisms are respectively fixedly installed on the two sets of guide rail sliders. A bidirectional lead screw is rotatably installed between the two sets of clamping uprights, and a clamping motor for driving the bidirectional lead screw to rotate is fixedly installed on one set of clamping uprights. Two sets of threaded seats are threadedly connected to the bidirectional lead screw, and the two sets of threaded seats are respectively fixedly connected to the lower end of the clamping mechanism.

[0011] Preferably, the clamping mechanism includes a clamping frame fixedly mounted on a threaded seat, a rotating seat rotatably mounted on the upper part of the clamping frame, and a clamping motor for driving the rotating seat to rotate fixedly mounted on the outer side wall of the clamping frame; a rotating bracket is fixedly mounted on the rotating seat, a bearing sleeve is fixedly mounted on the rotating bracket, a clamping shaft is rotatably mounted inside the bearing sleeve through a bearing, and clamping pressure rollers for pressing the pipe are fixedly mounted at both ends of the clamping shaft.

[0012] Preferably, the support mechanism includes a support base fixedly installed on the upper end of the connecting support, a support base plate fixedly provided on the upper end of the support base, and an arc-shaped groove for placing a pipe of fixed diameter provided on the upper end of the support base plate; A vertically upward support cylinder is fixedly installed on the upper end of the support base. A lifting connecting rod is fixedly connected to the output end of the support cylinder. Rotating arms are rotatably connected to both ends of the lifting connecting rod. The middle part of the rotating arm is rotatably connected to the support base plate through a pin. A support block for supporting the pipeline is rotatably installed at the end of the rotating arm away from the lifting connecting rod through a pin.

[0013] Preferred method: A method of using a positioning device for a circular pipe machining center, comprising the following steps: Step 1: First, set the clamping mechanism and support mechanism in the middle of the device base, and place the pipe that needs to be centered on the two sets of support mechanisms. Step 2: The lifting adjustment component on one side is moved to the end of the pipe by translation drive, and the lifting adjustment component on that side drives the center positioning component set on it to be inserted into the pipe. Then, the positioning push plate is moved by electric push rod, and the drive sleeve is moved synchronously under the linkage of the push plate insert plate to complete the radial extension and retraction of the top pressure block, so that multiple sets of top pressure blocks are pressed against the inner wall of the pipe to complete the center positioning of one side of the pipe. Step 3: Then, driven by the clamping drive assembly, the clamping mechanism and the support mechanism move toward the lifting adjustment assembly on the other side and stop when they are close to the end of the pipe. The support height of the support mechanism on the pipe is adjusted to make the pipe horizontal. The horizontal state can be determined with the help of a level. After the horizontal state is adjusted, the two sets of support mechanisms adjust to clamp the upper part of the pipe, so that the pipe is in a fixed state. Step 4: Subsequently, another set of lifting and adjusting components moves toward the pipeline under the drive of translation, so that the center positioning component on it is inserted into the pipeline. Then, the inner wall of the pipeline is squeezed and clamped by the center positioning component to complete the center positioning of both ends of the pipeline. Moreover, the clamping mechanism and the support mechanism not only assist in the center positioning of the pipeline, but also maintain the stability of the pipeline during the subsequent processing.

[0014] The beneficial effects of this invention are as follows: By integrating a central positioning component, a lifting and adjusting component, a clamping mechanism, and a supporting mechanism, precise alignment of the pipe's geometric center is achieved. This device can adjust the spacing of the clamping mechanism via the clamping drive component and flexibly adapt to pipes of different diameters and specifications through the radial extension and retraction of the central positioning component. Furthermore, the synergistic effect of the clamping and supporting mechanisms ensures stable support and fixation of the pipe during positioning and subsequent processing, effectively solving the problems of insufficient pipe positioning accuracy, poor adaptability, and unsatisfactory processing stability in existing technologies, thus meeting the requirements for high-precision processing and flexible adaptation. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is an isometric structural schematic diagram of the entire invention; Figure 3 This is a three-dimensional structural schematic diagram of the clamping drive component of the present invention; Figure 4 This is an isometric structural diagram of the clamping drive assembly of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the support mechanism of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the lifting and adjusting component of the present invention; Figure 8 This is a three-dimensional structural diagram of the central positioning component of the present invention; Figure 9 This is a schematic diagram of the main structure of the central positioning component of the present invention; Figure 10 This is the present invention. Figure 9 Schematic diagram of the cross-sectional structure along the AA direction; Figure 11 This is the present invention. Figure 9 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 12 This is a three-dimensional structural diagram of the drive sleeve of the present invention.

[0017] In the diagram: 1. Device base; 11. Base guide rail; 12. Base rack; 13. Sliding support one; 14. Sliding support two; 15. Connecting support; 2. Translation drive; 3. Lifting adjustment assembly; 31. Lifting base; 32. Lifting groove; 33. Lifting guide groove; 34. Motor plate; 35. Lifting motor; 36. Lifting screw; 37. Lifting sliding seat; 38. Lifting guide block; 4. Center positioning assembly; 41. Positioning sleeve; 411. Sleeve shaft hole; 412. T-shaped slide groove; 413. Connecting through groove; 42. Connecting end plate; 43. Electric push rod; 44. Positioning push plate; 441. Push plate slot; 45. Push plate insert plate; 451. Insert plate groove; 46. Drive sliding sleeve; 461. Sliding sleeve; 462. T-shaped slider; 463. Insertion groove; 46 4. Insert plate stop; 465. Stop plate connecting plate; 466. Connecting plate guide rod; 467. Insert plate spring; 47. Connecting rod one; 48. Connecting rod two; 49. Top pressure block; 5. Clamping drive assembly; 51. Clamping guide rail; 52. Guide rail slider; 53. Clamping upright plate; 54. Clamping motor; 55. Bidirectional lead screw; 56. Translation motor; 57. Translation gear; 6. Clamping mechanism; 61. Clamping frame; 58. Threaded seat; 63. Rotating seat; 64. Clamping motor; 65. Rotating bracket; 66. Bearing sleeve; 67. Clamping shaft; 68. Clamping pressure roller; 7. Support mechanism; 71. Support base; 72. Support base plate; 73. Arc groove; 74. Support cylinder; 75. Lifting connecting rod; 76. Rotating arm; 77. Pin one; 78. Pin two; 79. Support block. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] Traditional pipe manufacturing, transportation, and installation often require precise positioning of their geometric center for subsequent processes such as cutting, alignment, welding, and inspection. However, existing technologies suffer from insufficient positioning accuracy, poor adaptability, and inadequate stability during processing when accurately positioning the pipe center point and adapting to different pipe specifications, making it difficult to meet the demands for high-precision processing and flexible adaptation.

[0020] For this, please refer to Figures 1-12As shown, this application proposes a center positioning device for processing circular pipes. It achieves precise center positioning, stable clamping and effective support of the pipe by setting up a device base 1, a base guide rail 11, a sliding support 13, a translation drive 2, a sliding support 14, a connecting support 15, a center positioning component 4, a lifting adjustment component 3, a clamping mechanism 6, a clamping drive component 5 and a support mechanism 7. It can also flexibly adapt to pipes of different specifications, thereby effectively solving the positioning accuracy and adaptability problems existing in the prior art.

[0021] Specifically, the device includes a base 1, which serves as the supporting foundation for the entire device, providing a stable mounting platform for all upper components. Base rails 11 are provided on both sides of the upper end of the base 1 along its length. These base rails 11 can be simple linear slide rails.

[0022] Near the sides of the upper end of the base guide rail 11, two sets of sliding supports 13 are slidably disposed. These sliding supports 13 can cooperate with the base guide rail 11, for example, via rollers or sliding bearings, to achieve horizontal movement. The device base 1 is also provided with a translation drive 2 for driving the sliding supports 13 to slide horizontally. This translation drive 2 can be a manual push-pull mechanism, or the reciprocating motion of the sliding supports 13 can be achieved through a simple hand-cranked screw mechanism.

[0023] A second sliding support 14 is slidably disposed at the upper middle part of the base guide rail 11. The second sliding support 14 can move on the base guide rail 11 through sliding engagement, similar to the first sliding support 13. Both ends of the second sliding support 14 are fixedly provided with connecting supports 15. These connecting supports 15 can be simple L-shaped brackets, used to support the subsequent support mechanism.

[0024] On the sliding support 13, there is a center positioning component 4 for positioning the center of the pipe, and a lifting adjustment component 3 for adjusting the height of the center positioning component 4. The lifting adjustment component 3 can be a manually adjustable threaded rod mechanism, in which the center positioning component 4 is vertically raised or lowered by rotating the threaded rod, or the height can be adjusted by stacking pads.

[0025] The sliding support 14 is equipped with two sets of clamping mechanisms 6 for holding the upper part of the pipe. These clamping mechanisms 6 can be composed of simple fixing clamps, and the clamping position can be manually adjusted by bolts. The sliding support 14 is also equipped with a clamping drive assembly 5 for adjusting the relative distance between the two sets of clamping mechanisms 6 to adapt to the clamping of pipes of different specifications. The clamping drive assembly 5 can be a manually adjustable one-way screw mechanism, which drives the clamping mechanisms 6 to move relative to each other by rotating the screw.

[0026] The connecting support 15 is equipped with a support mechanism 7 for supporting the bottom of the pipe. The support mechanism 7 can consist of V-blocks or rollers of fixed height, used to bear the weight of the pipe.

[0027] The clamping drive assembly 5 is specifically implemented by a translation motor 56 fixedly installed at one end of the sliding support 14. A translation gear 57 is fixedly installed on the output shaft of the translation motor 56. A base rack 12, which meshes with the translation gear 57, is fixedly installed on the side wall of the base guide rail 11. The translation motor 56 drives the translation gear 57 to rotate, and the translation gear 57 meshes with the base rack 12 to drive the sliding support 14 and the clamping mechanism 6 and support mechanism 7 on it to adjust their positions along the length direction, thereby achieving stable support and clamping of the pipeline.

[0028] The center positioning component 4 includes a positioning sleeve 41. The positioning sleeve 41 has a central sleeve shaft hole 411 and a plurality of T-shaped grooves 412 arranged in a circular array on its outer periphery. These T-shaped grooves 412 can be machined from the body of the positioning sleeve 41 to provide guidance for the drive sleeve 46. The drive sleeve 46 is slidably mounted on the outer periphery of the positioning sleeve 41, and the drive sleeve 46 can easily slide against the outer periphery of the positioning sleeve 41 via a sliding bearing or bushing.

[0029] A connecting rod 47 is rotatably connected to the side of the T-shaped slide 412 away from the lifting and adjusting assembly 3. A connecting rod 48 is rotatably connected to the drive sleeve 46. A pressing block 49 for pressing against the inner wall of the pipe is rotatably connected to the ends of the connecting rods 47 and 48 away from the positioning sleeve 41. These connecting rods and the pressing block 49 can form a simple four-bar linkage mechanism, in which the pressing block 49 is radially pushed out or retracted by the axial movement of the drive sleeve 46.

[0030] A connecting end plate 42 is detachably mounted on the end of the positioning sleeve 41 away from the lifting adjustment assembly 3. An electric push rod 43 for driving the drive sleeve 46 to slide is mounted on the connecting end plate 42. The output end of the electric push rod 43 can be directly connected to the drive sleeve 46 by bolts or by a simple pin, thereby driving the drive sleeve 46 to slide along the axial direction of the positioning sleeve 41.

[0031] This embodiment provides a center positioning device for machining circular pipes. By integrating a center positioning component 4, a lifting and adjusting component 3, a clamping mechanism 6, and a supporting mechanism 7, it achieves precise alignment of the pipe's geometric center. The device can adjust the spacing of the clamping mechanism 6 via the clamping drive component 5, and flexibly adapt to pipes of different diameters and specifications through the radial extension and retraction of the center positioning component 4. Furthermore, the synergistic effect of the clamping mechanism 6 and the supporting mechanism 7 ensures stable support and fixation of the pipe during positioning and subsequent machining, effectively solving the problems of insufficient pipe positioning accuracy, poor adaptability, and unsatisfactory machining stability in existing technologies, thus meeting the requirements for high-precision machining and flexible adaptation.

[0032] In some of the embodiments described above in this application, a lifting adjustment component is proposed to adjust the height of the center positioning component. However, in its implementation, the lifting may lack a stable guiding mechanism, causing the center positioning component to sway or deviate during height adjustment, thereby affecting the accuracy of the pipeline center positioning.

[0033] For this, please refer to Figures 1-2 and Figure 7 As shown, this application further proposes a lifting adjustment component 3, which includes a lifting base 31 fixedly installed on the upper end of the sliding support 13. The lifting base 31 is provided with a vertical lifting groove 32. The side wall of the lifting groove 32 is provided with a lifting guide groove 33. A lifting sliding seat 37 is slidably installed at the lifting groove 32. Lifting guide blocks 38 that are slidably connected to the lifting guide groove 33 are fixedly installed at both ends of the lifting sliding seat 37. The center positioning component 4 is fixedly installed on the lifting sliding seat 37.

[0034] Through the above technical solution, the lifting base 31 provides a stable installation foundation for the entire lifting adjustment assembly 3, while the lifting groove 32 and the lifting guide groove 33 set on its side wall together construct a precise vertical guide path. The lifting sliding seat 37 slides within the lifting groove 32 and is tightly engaged with the lifting guide groove 33 by the lifting guide blocks 38 fixed at both ends, effectively constraining the lateral movement and swaying of the lifting sliding seat 37. This integrated guide mechanism ensures that the center positioning assembly 4 can smoothly and accurately rise and fall along a preset straight path when adjusting its height, avoiding positioning errors caused by swaying or offset. Therefore, the lifting adjustment assembly 3 of this application significantly improves the adjustment accuracy and stability of the center positioning assembly 4 in the vertical direction, thereby ensuring the accuracy of pipeline center positioning and improving the overall reliability and positioning effect of the device.

[0035] In some of the embodiments described above in this application, a lifting adjustment component is proposed to adjust the height of the center positioning component. However, in its implementation, the lack of an automatic driving mechanism may lead to the height adjustment relying on manual operation, resulting in insufficient positioning accuracy and low adjustment efficiency.

[0036] For this, please refer to Figures 1-2 and Figure 7 As shown, this application further proposes that, based on the above-mentioned lifting adjustment assembly 3, a motor plate 34 is detachably and fixedly installed on the upper end of the lifting base 31, a lifting screw 36 is rotatably installed at the lifting groove 32, a lifting sliding seat 37 is threadedly connected to the lifting screw 36, and a lifting motor 35 for driving the lifting screw 36 to rotate is fixedly installed on the motor plate 34.

[0037] Through the above technical solution, a motor plate 34 is detachably and fixedly installed on the lifting base 31, and a lifting motor 35 is fixedly installed on this motor plate 34. The lifting motor 35 can drive the lifting screw 36, which is rotatably installed in the lifting groove 32. Since the lifting sliding seat 37 is threadedly connected to the lifting screw 36, the precise rotation of the lifting motor 35 can drive the lifting sliding seat 37 to move precisely and linearly in the vertical direction through the lifting screw 36. Given that the center positioning component 4 is fixedly installed on the lifting sliding seat 37, this automated drive mechanism makes the height adjustment of the center positioning component 4 no longer dependent on manual operation, but is achieved through the precise control of the motor. This not only significantly improves the automation level and ease of operation of height adjustment, but more importantly, through the inherent high-precision characteristics of screw drive, it ensures the positioning accuracy of the center positioning component 4 in the vertical direction, thereby effectively solving the problems of insufficient positioning accuracy and low adjustment efficiency that may be caused by manual operation. In addition, the detachable motor plate 34 design also provides convenience for the maintenance and replacement of the lifting motor 35, further improving the practicality and reliability of the device.

[0038] In some of the solutions described above in this application, a center positioning component is proposed to adapt to the center positioning of pipes of different diameters by driving the top pressure block to radially extend and retract through the sliding of the driving sleeve. However, in its implementation, the connection mechanism of the driving sleeve may lack reliable disassembly, resulting in difficulties in disassembling and assembling the component, affecting maintenance efficiency and flexibility in adapting to different pipe specifications.

[0039] For this, please refer to Figures 7-12As shown, the bottom of the T-shaped slide groove 412 is provided with a connecting through groove 413 that connects to the sleeve shaft hole 411. A positioning push plate 44 is slidably disposed in the sleeve shaft hole 411. The positioning push plate 44 is fixedly connected to the output end of the electric push rod 43. Multiple push plate slots 441 are provided on the outer periphery of the positioning push plate 44. A push plate insert plate 45 is slidably inserted into the push plate slot 441. The push plate insert plate 45 is detachably connected to the drive slide sleeve 46 through the connecting through groove 413.

[0040] Specifically, the connecting slot 413 is a channel structure located at the bottom of the T-shaped slide 412 and connecting to the sleeve shaft hole 411. Its main function is to provide a through path for the push plate 45, allowing it to extend from inside the sleeve shaft hole 411 to the outside of the T-shaped slide 412 and connect with the drive sleeve 46. The connecting slot 413 can be milled or cast, with a narrow opening pre-reserved at the bottom of the T-shaped slide 412 of the positioning sleeve 41 to connect with the sleeve shaft hole 411. Alternatively, the connecting slot 413 can also be formed by providing multiple independent holes at the bottom of the T-shaped slide 412 of the positioning sleeve 41, these holes arranged axially to form a channel allowing the push plate 45 to pass through.

[0041] The positioning push plate 44 is a disc-shaped or columnar component slidably disposed inside the sleeve shaft hole 411. Its main function is to receive the driving force of the electric push rod 43 and transmit this force to the push plate insert 45, thereby indirectly driving the sliding of the drive sleeve 46. The positioning push plate 44 can be designed as a disc with guide grooves or guide protrusions, which cooperates with the corresponding structure of the inner wall of the sleeve shaft hole 411 to ensure stable axial sliding. Alternatively, the positioning push plate 44 can be a rod with a specific cross-sectional shape, with a correspondingly shaped hole in the sleeve shaft hole 411 to prevent rotation and ensure linear sliding. The positioning push plate 44 is fixedly connected to the output end of the electric push rod 43. This fixed connection ensures that the linear motion of the electric push rod 43 can be directly and without loss transmitted to the positioning push plate 44, thereby achieving precise driving of subsequent mechanisms. This fixed connection can be achieved by means of threaded connection, pin connection, or key connection. Alternatively, the output ends of the positioning push plate 44 and the electric push rod 43 can be integrated into one unit during manufacturing to improve the rigidity and precision of the connection.

[0042] The push plate slot 441 is a groove-shaped structure located on the outer periphery of the positioning push plate 44, used for slidingly inserting the push plate insert 45. Its function is to provide a pluggable interface for the push plate insert 45, enabling a detachable connection and motion transmission between the positioning push plate 44 and the push plate insert 45. The push plate slot 441 can be designed as a rectangular slot opened radially along the positioning push plate 44, with its depth and width matching the dimensions of the push plate insert 45 to ensure the stability of the sliding connection. Alternatively, the push plate slot 441 can be designed as a T-shaped slot or a dovetail slot, cooperating with corresponding T-shaped protrusions or dovetail protrusions on the push plate insert 45 to provide stronger resistance to pull-out. The push plate insert 45 is a plate-shaped component that slides into the push plate slot 441. Its function is to transmit the axial movement of the positioning push plate 44 to the drive sleeve 46 and serves as a key component for the detachable connection. The push plate 45 can be made of high-strength metal, and its shape and size precisely match the push plate slot 441 to ensure good guidance and stability during sliding. Alternatively, the push plate 45 can be made of composite materials or engineering plastics to reduce weight and may have self-lubricating properties to reduce friction. The push plate 45 is detachably connected to the drive sleeve 46 through the connecting slot 413. This connection allows the push plate 45 to pass through the internal structure of the positioning sleeve 41, transmitting the movement of the positioning push plate 44 to the external drive sleeve 46, while maintaining the detachability of the connection, facilitating the assembly, maintenance, and replacement of components. The push plate 45 and the drive sleeve 46 can be detachably connected by means of pins, bolts, clips, or quick-release mechanisms. For example, the end of the push plate 45 can have a hole, which, after being aligned with the corresponding hole on the drive sleeve 46, can be fixed by inserting a pin. Another approach is to design a protrusion or hook-like structure at the end of the push plate 45, which can engage with the groove or mating structure on the drive sleeve 46 and can be quickly separated with a simple operation.

[0043] Through the above technical solution, this application provides a clear path for motion transmission in the central positioning component 4 by setting a connecting groove 413 at the bottom of the T-shaped slide groove 412 to connect the sleeve shaft hole 411. The positioning push plate 44 is slidably disposed in the sleeve shaft hole 411 and fixedly connected to the output end of the electric push rod 43, ensuring that the precise driving force of the electric push rod 43 can be effectively transmitted. Multiple push plate slots 441 on the outer periphery of the positioning push plate 44 and the slidingly inserted push plate plate 45 form a modular interface, allowing the push plate plate 45 to pass through the connecting groove 413 and achieve a detachable connection with the drive slide sleeve 46. This design cleverly solves the problem of the lack of reliable detachability in the connection mechanism of the drive slide sleeve 46. Specifically, when the central positioning component 4 needs to be assembled or maintained, the operator can easily connect or separate the positioning push plate 44 and the drive slide sleeve 46 by inserting and removing the push plate plate 45, greatly simplifying the disassembly and assembly process and improving maintenance efficiency. Meanwhile, this detachable connection method also enhances the flexibility of the center positioning component 4, allowing for quick replacement or adjustment of components such as the drive sleeve 46 or the top pressure block 49 as needed when adapting to pipes of different diameters, without the need for complex disassembly of the entire center positioning component 4. This effectively improves the device's adaptability to pipes of different specifications and the convenience of on-site operation.

[0044] In some of the solutions described above in this application, a drive sleeve is proposed to slide and drive the top pressure block to extend and retract radially. However, in this process, the structure of the drive sleeve may not be specific enough, resulting in complex assembly, inaccurate sliding, or weak connection.

[0045] For this, please refer to Figures 7-12 As shown, the driving sleeve 46 includes a sliding sleeve 461 that is slidably sleeved on the outer periphery of the positioning sleeve 41. The inner periphery of the sliding sleeve 461 is provided with a T-shaped slider 462 that slidably engages with the T-shaped sliding groove 412. The connecting rod 48 is rotatably connected to the T-shaped slider 462. The end of the sliding sleeve 461 away from the connecting rod 48 is provided with an insertion groove 463 that engages with the push plate 45.

[0046] Specifically, the sliding sleeve 461 is the core component of the driving sleeve 46. Its main function is to provide a carrier that can slide along the axial direction of the positioning sleeve 41 to drive the connecting rod 48. The sliding sleeve 461 can adopt a cylindrical structure, with its inner diameter precisely matching the outer diameter of the positioning sleeve 41 to ensure the stability and smoothness of the sliding process. Alternatively, the sliding sleeve 461 can also be designed as a split structure, for example, assembled from two or more half-ring parts by bolts or other fasteners. This design facilitates the installation of the sliding sleeve 461 onto the positioning sleeve 41 during assembly and facilitates subsequent maintenance and component replacement. The T-shaped slider 462 is disposed on the inner circumference of the sliding sleeve 461, and its function is to form a precise guiding fit with the T-shaped groove 412 on the positioning sleeve 41. This T-shaped structure can effectively restrict the radial and circumferential degrees of freedom of the sliding sleeve 461, ensuring that it can only slide along the axial direction of the positioning sleeve 41, thereby ensuring the accuracy of the drive. The T-shaped slider 462 can be integrally formed with the sliding sleeve 461 through precision machining such as milling or casting. Alternatively, the T-shaped slider 462 can be a separate component, securely fixed to the inner circumference of the sliding sleeve 461 by bolts, riveting, or welding. This allows for the use of different materials or more precise machining processes to manufacture the slider, optimizing its wear resistance and sliding performance. The connecting rod 48 is rotatably connected to the T-shaped slider 462. This connection effectively converts the axial sliding of the T-shaped slider 462 into the oscillation of the connecting rod 48, thereby driving the top pressure block 49 to achieve radial extension and retraction. The rotatable connection is typically achieved through a pin or shaft. The pin passes through corresponding holes on the connecting rod 48 and the T-shaped slider 462 and can be axially fixed by a retaining ring or nut, ensuring the reliability of the connection and the flexibility of rotation. The insertion slot 463 is located at the end of the sliding sleeve 461 away from the connecting rod 48, and its main function is to serve as a connection interface with the push plate 45. The design of the insertion slot 463 should match the shape and size of the push plate 45, for example, it can be designed as a rectangular or U-shaped slot so that the push plate 45 can be easily and accurately inserted and removed. This insertion method not only simplifies the assembly process, but also ensures that the driving force transmitted by the electric push rod 43 through the positioning push plate 44 and the push plate 45 can act stably and reliably on the sliding sleeve 461.

[0047] Through the above technical solution, this application effectively solves the problems of complex assembly, inaccurate sliding, and weak connection that may exist in the sliding drive process of the drive sleeve by specifically defining the structure of the drive sleeve 46. Specifically, the drive sleeve 46 includes a sliding sleeve 461 that is slidably sleeved on the outer periphery of the positioning sleeve 41, which allows the drive sleeve 46 to slide stably along the positioning sleeve 41 and avoids displacement during radial extension and retraction. The inner periphery of the sliding sleeve 461 is provided with a T-shaped slider 462 that slides in conjunction with the T-shaped groove 412. This engagement provides precise guidance, ensuring smooth and wobbly sliding, thereby improving sliding accuracy. The second connecting rod 48 is rotatably connected to the T-shaped slider 462, so that when the sliding sleeve 461 moves, the second connecting rod 48 can directly and effectively transmit the motion to the top pressure block 49 based on the fixed point of the T-shaped slider 462, enhancing driving efficiency. The end of the sliding sleeve 461 furthest from the connecting rod 48 is provided with a insertion groove 463 that mates with the push plate 45. This achieves a reliable connection with the push plate 45, simplifies the assembly process, ensures stable transmission of driving force, and prevents loosening of the connection. Overall, this structural design makes the drive mechanism of the center positioning component 4 more stable and precise, and easier to assemble and maintain, thereby improving the reliability and efficiency of pipeline center positioning.

[0048] In some of the solutions described above in this application, a drive sleeve is proposed to connect the push plate. However, in its implementation, the connection may be unstable or the assembly may be complicated, affecting quick replacement and adaptation to different pipes.

[0049] For this, please refer to Figures 7-12As shown, this application further proposes the following technical solution: a plate stop 464 is slidably connected through the side wall of the insertion groove 463; the upper part of the push plate 45 is provided with an insertion groove 451 that slidably engages with the plate stop 464; a stop connecting plate 465 is fixedly connected to the side of the plate stop 464 away from the insertion groove 463; a connecting plate guide rod 466 is slidably connected through the stop connecting plate 465; one end of the connecting plate guide rod 466 is fixedly connected to the sliding sleeve 461; a plate spring 467 is sleeved on the outer periphery of the connecting plate guide rod 466. One end of the insert spring 467 is fixedly connected to the sliding sleeve 461, and the other end of the insert spring 467 is fixedly connected to the stop plate 465. When the center positioning component 4 needs to be assembled, firstly, the positioning push plate 44 is installed at the output end of the electric push rod 43, and then the electric push rod 43 is fixedly installed at the end of the positioning sleeve 41 through the connecting end plate 42. Subsequently, multiple sets of push plate inserts 45 are inserted into the push plate slot 441 through the connecting through groove 413. After the push plate inserts 45 are inserted, the drive sliding sleeve 46 is moved from the positioning sleeve 41 towards the connecting end. One side of plate 42 is fitted onto the outside of positioning sleeve 41. Before the drive sliding sleeve 46 is fitted onto positioning sleeve 41, connecting rod 48 is installed at T-shaped slider 462. When the drive sliding sleeve 46 slides along T-shaped groove 412 and fits onto the outer periphery of positioning sleeve 41, the part of push plate 45 extending out of positioning sleeve 41 is inserted into insertion groove 463. At the same time as being inserted into insertion groove 463, the insert plate blocks 464 are pressed to both sides, and under the elastic action of insert plate spring 467, the insert plate blocks 464 on both sides are inserted into insert plate groove 451, completing the push plate insertion. The limit lock of 45 and drive sleeve 46 is then installed. Then, the connecting rod 47 is rotated and installed at the end of the T-shaped slide 412. Finally, the top pressure block 49 is installed on the connecting rod 47 and the connecting rod 48. The positioning push plate 44 is moved by the electric push rod 43, and the drive sleeve 46 is moved synchronously under the linkage of the push plate insert plate 45 to complete the radial extension and retraction of the top pressure block 49. It is suitable for the center top pressure positioning of pipes with different diameters. The detachable center positioning component 4 can be quickly disassembled and assembled, and different parts can be quickly replaced for flexible adaptation according to different pipe specifications.

[0050] Through the above technical solution, this application provides a cleverly structured and easy-to-operate connection locking mechanism, effectively solving the problems of weak connection and complex assembly between the drive sleeve 46 and the push plate 45. During assembly, when the push plate 45 is inserted into the insertion slot 463, its side will press against the plate stop 464, causing the plate stop 464 to slide to both sides under the guidance of the connecting plate guide rod 466, while compressing the plate spring 467. Once the push plate 45 is fully inserted, the plate stop 464 automatically resets under the elastic action of the plate spring 467 and locks into the plate slot 451 on the push plate 45, thereby achieving a quick and reliable limiting and locking connection between the push plate 45 and the drive sleeve 46. This self-locking connection method not only improves the stability of the connection and avoids the loosening risk that may be caused by traditional bolt or pin connections, but also greatly simplifies the assembly and disassembly process, enabling the center positioning component 4 to be quickly assembled and disassembled. Furthermore, due to the ease of connection, users can quickly replace different top pressure blocks 49 or drive sleeves 46 and other components according to the needs of different pipe specifications, thereby achieving flexible adaptation to pipes of different diameters and significantly improving the versatility and efficiency of the device.

[0051] In some embodiments of this application, a clamping drive assembly is proposed to adjust the relative distance between two sets of clamping mechanisms to adapt to the clamping of pipes of different specifications. However, in its implementation, the sliding support 14 is moved as a whole by gear and rack transmission, which cannot accurately control the relative distance between the two sets of clamping mechanisms, resulting in unstable clamping or inflexible adjustment.

[0052] For this, please refer to Figures 1-4 As shown, the clamping drive assembly 5 also includes two sets of clamping guide rails 51 and two sets of clamping upright plates 53 fixedly disposed on the upper end of the sliding support 14. Two sets of guide rail sliders 52 are slidably disposed on the clamping guide rails 51, and two sets of clamping mechanisms 6 are respectively fixedly installed on the two sets of guide rail sliders 52. A bidirectional lead screw 55 is rotatably installed between the two sets of clamping upright plates 53, and a clamping motor 54 for driving the bidirectional lead screw 55 to rotate is fixedly installed on one set of clamping upright plates 53. Two sets of threaded seats 58 are threadedly connected to the bidirectional lead screw 55, and the two sets of threaded seats 58 are respectively fixedly connected to the lower end of the clamping mechanism 6.

[0053] Through the above technical solution, the two sets of clamping guide rails 51 and the two sets of clamping uprights 53 provide a stable sliding support frame for the clamping mechanism 6, ensuring the structural rigidity of the clamping mechanism 6 during the adjustment process. The two sets of clamping mechanisms 6 slide on the clamping guide rails 51 via guide rail sliders 52, achieving independent mobility of the clamping mechanism 6 and avoiding the inaccuracies caused by overall movement. Furthermore, a bidirectional lead screw 55 is rotatably installed between the two sets of clamping uprights 53 and driven to rotate by the clamping motor 54. Two sets of threaded seats 58 threaded onto the bidirectional lead screw 55 are fixedly connected to the lower end of the clamping mechanism 6. When the clamping motor 54 drives the bidirectional lead screw 55 to rotate, the left- and right-hand thread characteristics of the bidirectional lead screw 55 allow the two sets of threaded seats 58 to move synchronously in opposite directions or move closer together, thereby precisely adjusting the relative distance between the two sets of clamping mechanisms 6. This design avoids the limitations of adjusting the spacing solely by moving the sliding support 214 as a whole, significantly improving the accuracy and flexibility of the spacing adjustment of the clamping mechanism 6, ensuring the stability and reliability when clamping pipes of different specifications, and effectively solving the problems of unstable clamping or inflexible adjustment.

[0054] In some of the embodiments described above in this application, a clamping mechanism is proposed for clamping the upper part of the pipe. However, in its implementation, the clamping mechanism may lack an effective rotation and pressing mechanism, resulting in unstable clamping or inability to adapt to changes in pipe shape, thus affecting positioning accuracy.

[0055] For this, please refer to Figures 1-5 As shown, this application further proposes a clamping mechanism 6, which includes a clamping frame 61 fixedly mounted on a threaded seat 58. A rotating seat 63 is rotatably mounted on the upper part of the clamping frame 61. A clamping motor 64 for driving the rotating seat 63 to rotate is fixedly mounted on the outer side wall of the clamping frame 61. A rotating bracket 65 is fixedly mounted on the rotating seat 63. A bearing sleeve 66 is fixedly mounted on the rotating bracket 65. A clamping shaft 67 is rotatably mounted inside the bearing sleeve 66 through a bearing. Clamping rollers 68 for pressing the pipe are fixedly mounted at both ends of the clamping shaft 67.

[0056] Through the above technical solution, the clamping frame 61 of the clamping mechanism 6 is fixedly mounted on the threaded seat 58, providing a solid support foundation for the entire mechanism. The rotating seat 63, rotatably mounted on the upper part of the clamping frame 61, can achieve precise angular rotation under the drive of the clamping motor 64 fixedly mounted on the outer wall of the clamping frame 61. This rotatable structure allows the rotating bracket 65, bearing sleeve 66, and clamping shaft 67 and clamping pressure roller 68, all fixedly mounted on the rotating seat 63, to rotate as a whole. This allows the clamping pressure roller 68 to be adjusted according to the actual posture and surface shape of the pipe, achieving multi-angle, flexible pressing. The clamping pressure roller 68's placement at both ends of the clamping shaft 67 ensures uniform pressing of the pipe, avoids localized stress concentration, and effectively improves the stability and reliability of the clamping. Simultaneously, the rotatable mounting of the clamping shaft 67 within the bearing sleeve 66 via bearings allows the clamping pressure roller 68 to roll smoothly when pressing the pipe, reducing friction and potential damage to the pipe surface, further improving the adaptability and positioning accuracy of the clamping. Therefore, the clamping mechanism 6 of this application can effectively solve the problem that the clamping mechanism in the prior art lacks an effective rotation and pressing mechanism, resulting in unstable clamping or inability to adapt to changes in pipe shape, and significantly improves the accuracy and reliability of pipe center positioning.

[0057] In some of the embodiments described above in this application, a support mechanism 7 is proposed to support the lower part of the pipe. However, in its implementation, the support mechanism lacks an adjustment function, making it difficult to effectively adapt to pipes of different specifications and failing to achieve a stable and accurate support effect.

[0058] For this, please refer to Figures 1-6 As shown, this application further proposes an adjustable support mechanism 7, which includes a support base 71 fixedly installed on the upper end of the connecting support 15. A support base plate 72 is fixedly provided on the upper end of the support base 71, and an arc-shaped groove 73 is provided on the upper end of the support base plate 72 for placing and initially positioning a pipe of a fixed diameter.

[0059] A vertically upward-facing support cylinder 74 is fixedly installed on the upper end of the support base 71. A lifting rod 75 is fixedly connected to the output end of the support cylinder 74. Rotating arms 76 are rotatably connected to both ends of the lifting rod 75. The middle part of the rotating arm 76 is rotatably connected to the support base plate 72 via a first pin 77, while the end of the rotating arm 76 away from the lifting rod 75 is rotatably mounted with a support block 79 for direct contact and support of the pipe via a second pin 78.

[0060] Through the above technical solution, the support cylinder 74 in the support mechanism 7 drives the lifting linkage 75 to move up and down through its telescopic movement, thereby causing the rotating arms 76 on both sides to rotate around the pivot pin 77. This linkage mechanism allows the support blocks 79 installed at the ends of the rotating arms 76 to be raised or lowered synchronously, thereby precisely adjusting the height and level of the pipe placed in the arc-shaped groove 73. With the assistance of an auxiliary level, the horizontal state of the pipe can be accurately determined, ensuring stability and accuracy during installation or construction.

[0061] In some of the solutions described above in this application, a device is proposed for centering the pipeline. However, during operation, there is a lack of detailed steps to ensure accurate and stable positioning, especially when adjusting the pipeline level and fixing its position, which leads to inaccurate positioning or low efficiency and cannot effectively support subsequent processing.

[0062] In this regard, this application further proposes a method for using a center positioning device for machining circular pipes, the method comprising the following steps: Step 1: First, position the clamping mechanism 6 and support mechanism 7 in the center of the device base 1, and place the pipe requiring centering on the two sets of support mechanisms 7. This step aims to provide a stable initial platform for the initial placement of the pipe and subsequent precise centering. Positioning the clamping mechanism 6 and support mechanism 7 in the center of the device base 1 ensures that the initial position of the pipe on the device is relatively centered, laying the foundation for subsequent precise positioning operations. The placement of the pipe can be achieved through manual handling, hoisting with lifting equipment, or automated conveying systems, ensuring it is securely supported on the two sets of support mechanisms 7, preventing accidental movement or tilting of the pipe before positioning.

[0063] Step 2: The translation drive 2 moves one of the lifting adjustment components 3 to the end of the pipe, and the lifting adjustment component 3 on that side drives the center positioning component 4 installed on it to be inserted into the pipe. Then, the electric push rod 43 drives the positioning push plate 44 to move, and under the linkage of the push plate insert plate 45, it drives the drive sleeve 46 to slide to complete the radial extension and retraction of the top pressure block 49, so that multiple sets of top pressure blocks 49 are pressed against the inner wall of the pipe to complete the center positioning of one side of the pipe. This step achieves the initial accurate center positioning of one end of the pipe. The translation drive 2 can be a gear and rack transmission mechanism, a screw and nut mechanism, or a synchronous belt transmission mechanism. Its function is to accurately control the movement of the lifting adjustment component 3 along the length direction of the device base 1 so that it accurately reaches the end of the pipe. The lifting adjustment component 3 is responsible for raising or lowering the center positioning component 4 to a suitable height so that it can be smoothly inserted into the pipe. Once the center positioning component 4 is inserted into place, the electric push rod 43 will drive the positioning push plate 44 to move axially. The positioning push plate 44 is linked with the drive sleeve 46 through the push plate insert 45, converting the axial movement into the radial sliding of the drive sleeve 46. The sliding of the drive sleeve 46 then drives multiple sets of top pressure blocks 49 to extend radially outward through the linkage mechanism until they are tightly pressed against the inner wall of the pipe, thereby achieving precise center positioning of that end of the pipe.

[0064] Step 3: Subsequently, driven by the clamping drive assembly 5, the clamping mechanism 6 and the support mechanism 7 move towards the lifting adjustment assembly 3 on the other side, stopping near the end of the pipe. The support height of the support mechanism 7 is adjusted to ensure the pipe is level, which can be confirmed using a level. Once the level is adjusted, the two sets of support mechanisms 7 clamp the upper part of the pipe, fixing it in a fixed state. This step aims to adjust and fix the overall level of the pipe, providing a stable environment for center positioning at the other end. The clamping drive assembly 5 controls the clamping mechanism 6 and the support mechanism 7 to move along the length of the device base 1, bringing them close to the other end of the pipe. At this position, the height of the support mechanism 7 can be finely adjusted, for example, using a hydraulic cylinder, pneumatic cylinder, or electric screw mechanism, to eliminate sagging or tilting of the pipe due to its own weight or uneven initial placement, ensuring the pipe is in an ideal level state. A level (such as an electronic level or bubble level) can be used to assist in detecting and confirming the levelness of the pipe. Once the pipe is level, the two sets of clamping mechanisms 6 will apply clamping force from above or to the side of the pipe to firmly fix the pipe to the support mechanism 7, preventing it from shifting or shaking during subsequent operations.

[0065] Step 4: Subsequently, another set of lifting and adjusting components 3 moves towards the pipeline under the drive of the translation drive 2, causing the center positioning component 4 on it to be inserted into the pipeline. The center positioning component 4 then squeezes and clamps the inner wall of the pipeline, completing the center positioning of both ends of the pipeline. The clamping mechanism 6 and the support mechanism 7 not only assist in the center positioning of the pipeline but also maintain the stability of the pipeline during subsequent processing. This step completes the center positioning of the other end of the pipeline and emphasizes the continuous role of the clamping and support mechanisms. Similar to Step 2, another set of lifting and adjusting components 3 moves under the drive of the translation drive 2 and inserts its center positioning component 4 into the pipeline. The center positioning component 4, again through the coordinated action of the electric push rod 43, the positioning push plate 44, the push plate insert plate 45, the drive sliding sleeve 46, and the top pressure block 49, squeezes and clamps the inner wall of the pipeline, thereby achieving precise center positioning of both ends of the pipeline. During this process, the clamping mechanism 6 and the support mechanism 7 not only assist in the positioning of the pipeline in the initial stage, but more importantly, after the center positioning of both ends of the pipeline is completed, they continuously provide stable support and clamping for the pipeline, ensuring that the pipeline maintains its precise center position and fixed state during subsequent cutting, welding, inspection and other processing, which greatly improves processing accuracy and efficiency.

[0066] Through the above technical solution, this application provides a systematic, precise, and stable method for using a pipeline center positioning device. This method is implemented in steps: first, the pipeline is initially placed and one end is positioned; then, the overall level of the pipeline is adjusted and fixed; finally, the precise center positioning of the other end is achieved. This operational process effectively solves the problems of inaccurate positioning and poor stability that may occur in traditional positioning processes. In particular, by introducing precise adjustment and fixation of the pipeline's level in step three, and by emphasizing the continuous stabilizing role of the clamping mechanism 6 and the support mechanism 7 in subsequent processing in step four, the pipeline maintains its precise center position throughout the entire processing cycle, thereby significantly improving the accuracy and efficiency of pipeline processing and reducing the scrap rate and rework costs caused by positioning errors.

[0067] The following example will provide a more detailed explanation of the above technical solution: In a pipe processing workshop, a user needs to precisely center a large-diameter metal pipe in order to perform subsequent automated welding operations. The pipe is quite long, requiring simultaneous centering at both ends to ensure overall alignment accuracy.

[0068] First, the operator places the pipe to be positioned on the device base 1. Base guide rails 11 are provided on both sides of the upper end of the device base 1 along its length. At this time, both sets of sliding supports 13 and 14 are located in the central area of ​​the device base 1. The pipe is initially placed on two sets of support mechanisms 7, which are fixedly installed on connecting supports 15, which in turn are fixedly installed at both ends of the sliding supports 14.

[0069] Next, the translation drive 2 drives one of the sliding supports 13 to slide horizontally along the base guide rail 11, moving the lifting adjustment assembly 3 and the center positioning assembly 4 on it to one end of the pipe. The lifting motor 35 in the lifting adjustment assembly 3 drives the lifting screw 36 to rotate. The lifting screw 36 is threaded onto the lifting sliding seat 37, thereby driving the lifting sliding seat 37 and the center positioning assembly 4 on it to precisely adjust their height in the vertical direction. After the center positioning assembly 4 is adjusted to the appropriate height, its positioning sleeve 41 is inserted into the pipe.

[0070] After the positioning component 4 is inserted into the pipe, the operator activates the electric push rod 43. As the positioning push plate 44 moves, the drive sleeve 46 slides along the outer periphery of the positioning sleeve 41 in tandem with the push plate insert 45. The sliding of the drive sleeve 46 causes the connecting rod 48 to rotate, and the connecting rod 48 and the connecting rod 47 together drive the pressure block 49 to extend and retract radially outward. Multiple pressure blocks 49 are evenly pressed against the inner wall of the pipe, thereby completing the precise center positioning of one side of the pipe. This internal pressure positioning method, compared with the traditional external clamping, can avoid damage to the outer wall of the pipe and ensure the accuracy of internal positioning, and is especially suitable for pipes with high surface quality requirements.

[0071] Subsequently, driven by the clamping drive assembly 5, the sliding support 14 moves along the base guide rail 11 toward the other side of the pipe until it stops near the other end of the pipe. The clamping drive assembly 5 includes a translation motor 56 fixedly mounted on one end of the sliding support 14. A translation gear 57 is fixedly mounted on the output shaft of the translation motor 56, and a base rack 12 that meshes with the translation gear 57 is fixedly provided on the side wall of the base guide rail 11. By driving the translation gear 57 to mesh with the base rack 12 through the translation motor 56, the sliding support 14 and its clamping mechanism 6 and support mechanism 7 are adjusted in position along the length direction.

[0072] After the sliding support 14 is in place, the operator fine-tunes the support height of the pipe using the support mechanism 7. Once the pipe reaches the desired level, the two clamping mechanisms 6 begin to clamp the upper part of the pipe, fixing it in a fixed state. The clamping motor 54 drives the bidirectional lead screw 55 to rotate, causing the two sets of threaded seats 58 to move towards or away from each other, thereby adjusting the relative distance between the two sets of clamping mechanisms 6 to accommodate pipes of different specifications. This combination of multi-point support and clamping provides a more stable fixing effect than a single support.

[0073] Finally, another set of lifting and adjusting components 3 moves towards the pipeline under the drive of the translation drive 2, causing the center positioning component 4 on it to insert into the pipeline. This center positioning component 4 also drives the positioning push plate 44 via the electric push rod 43, which in turn drives the push plate insert plate 45 and the drive sliding sleeve 46, causing the top pressure block 49 to radially extend and retract, squeezing and clamping the inner wall of the pipeline, thus completing the precise center positioning of the other end of the pipeline. At this point, both ends of the pipeline have achieved precise center positioning, and the clamping mechanism 6 and the support mechanism 7 not only assist in the center positioning of the pipeline but also maintain stability during subsequent pipeline processing, such as welding or cutting, ensuring processing accuracy and quality. This integrated positioning, support, and clamping solution effectively solves the problem of difficulty in accurately obtaining the geometric center position of the pipe during processing, significantly improving work efficiency and product quality. Furthermore, the detachable design of the center positioning component 4, through the cooperation of components such as the insert plate stop 464 and the insert plate spring 467, allows for quick assembly and disassembly, and allows for flexible adaptation by quickly replacing different components according to different pipe specifications, improving the equipment's versatility and adaptability.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A center positioning device for machining circular pipes, characterized in that: The device includes a base (1), and base guide rails (11) are provided on both sides of the upper end of the base (1) along the length direction. Two sets of sliding supports (13) are slidably provided on the upper end of the base guide rails (11) near the sides. A translation drive (2) for driving the sliding supports (13) to slide horizontally is provided on the base (1). A second sliding support (14) is slidably provided in the middle of the upper end of the base guide rails (11). Both ends of the second sliding support (14) are fixedly provided with connecting supports (15). The sliding support (13) is provided with a center positioning component (4) for positioning the center of the pipeline, and the sliding support (13) is provided with a lifting adjustment component (3) for adjusting the height of the center positioning component (4). The sliding support (14) is provided with two sets of clamping mechanisms (6) for clamping the upper part of the pipe, and the sliding support (14) is provided with a clamping drive assembly (5) for adjusting the relative distance between the two sets of clamping mechanisms (6), which is suitable for clamping pipes of different specifications. The connecting support (15) is provided with a support mechanism (7) for supporting the bottom of the pipe; the clamping drive assembly (5) includes a translation motor (56) fixedly installed at one end of the sliding support (14), a translation gear (57) is fixedly installed on the output shaft of the translation motor (56), and a base rack (12) is fixedly installed on the side wall of the base guide rail (11) and meshes with the translation gear (57). The clamping mechanism (6) and the support mechanism (7) are driven to adjust their positions along the length direction through the meshing transmission of the gear and rack, so as to achieve stable support and clamping of the pipe; The central positioning component (4) includes a positioning sleeve (41), the center of which is provided with a sleeve shaft hole (411), and the outer periphery of the positioning sleeve (41) is provided with a plurality of T-shaped grooves (412) arranged in a ring array. The outer periphery of the positioning sleeve (41) is slidably provided with a driving sleeve (46). The side of the T-shaped groove (412) away from the lifting adjustment component (3) is rotatably connected to a connecting rod one (47). The driving sleeve (46) is rotatably connected to a connecting rod two (48). The ends of the connecting rod one (47) and the connecting rod two (48) away from the positioning sleeve (41) are rotatably connected to a pressing block (49) for pressing against the inner wall of the pipe. The end of the positioning sleeve (41) away from the lifting adjustment component (3) is detachably installed with a connecting end plate (42), and the connecting end plate (42) is installed with an electric push rod (43) for driving the driving sleeve (46) to slide.

2. The center positioning device for processing circular pipes according to claim 1, characterized in that: The lifting adjustment assembly (3) includes a lifting base (31) fixedly installed on the upper end of the sliding support (13). The lifting base (31) is provided with a vertical lifting groove (32). The side wall of the lifting groove (32) is provided with a lifting guide groove (33). A lifting sliding seat (37) is slidably installed at the lifting groove (32). Lifting guide blocks (38) that are slidably connected to the lifting guide groove (33) are fixedly installed at both ends of the lifting sliding seat (37). The center positioning assembly (4) is fixedly installed on the lifting sliding seat (37).

3. A center positioning device for processing circular pipes according to claim 2, characterized in that: The upper end of the lifting base (31) is detachably fixedly mounted with a motor plate (34), the lifting screw (36) is rotatably mounted at the lifting groove (32), the lifting sliding seat (37) is threadedly connected to the lifting screw (36), and the motor plate (34) is fixedly mounted with a lifting motor (35) for driving the lifting screw (36) to rotate.

4. A center positioning device for processing circular pipes according to claim 1, characterized in that: The bottom of the T-shaped slide groove (412) is provided with a connecting groove (413) that connects to the sleeve shaft hole (411). A positioning push plate (44) is slidably arranged in the sleeve shaft hole (411). The positioning push plate (44) is fixedly connected to the output end of the electric push rod (43). Multiple push plate slots (441) are provided on the outer periphery of the positioning push plate (44). A push plate insert (45) is slidably inserted into the push plate slot (441). The push plate insert (45) is detachably connected to the drive slide sleeve (46) through the connecting groove (413).

5. A center positioning device for processing circular pipes according to claim 4, characterized in that: The drive sleeve (46) includes a sliding sleeve (461) that is slidably sleeved on the outer periphery of the positioning sleeve (41). The inner periphery of the sliding sleeve (461) is provided with a T-shaped slider (462) that slidably engages with the T-shaped slide groove (412). The second connecting rod (48) is rotatably connected to the T-shaped slider (462). The end of the sliding sleeve (461) away from the second connecting rod (48) is provided with a plug groove (463) that engages with the push plate insert (45).

6. A center positioning device for processing circular pipes according to claim 5, characterized in that: A plate stop (464) is slidably connected through the side wall of the insertion slot (463). The upper part of the push plate (45) is provided with a plate groove (451) that slidably engages with the plate stop (464). A stop plate connecting plate (465) is fixedly connected to the side of the plate stop (464) away from the insertion slot (463). A connecting plate guide rod (466) is slidably connected through the stop plate connecting plate (465). One end of the connecting plate guide rod (466) is fixedly connected to the sliding sleeve (461). A plate spring (467) is sleeved on the outer periphery of the connecting plate guide rod (466). One end of the plate spring (467) is fixedly connected to the sliding sleeve (461), and the other end of the plate spring (467) is fixedly connected to the stop plate connecting plate (465). When the center positioning component (4) needs to be assembled, first install the positioning push plate (44) at the output end of the electric push rod (43), then fix the electric push rod (43) at the end of the positioning sleeve (41) through the connecting end plate (42), and then insert multiple sets of push plate inserts (45) through the connecting through groove (413) into the push plate slot (441). After the push plate inserts (45) are inserted, the drive sleeve (46) is inserted from the side of the positioning sleeve (41) near the connecting end plate (42) into the outside of the positioning sleeve (41). Before the drive sleeve (46) is inserted into the positioning sleeve (41), the connecting rod two (48) is installed at the T-shaped slider (462). When the drive sleeve (46) slides along the T-shaped slide groove (412) and is fitted onto the outer periphery of the positioning sleeve (41), the part of the push plate insert (45) extending out of the positioning sleeve (41) is inserted into the insertion groove (463). In the middle, while inserting into the insertion slot (463), the insert plate blocks (464) are squeezed to both sides, and under the elastic action of the insert plate spring (467), the insert plate blocks (464) on both sides are inserted into the insert plate slot (451) to complete the limiting and locking of the push plate insert (45) and the drive sleeve (46). Then, the connecting rod one (47) is rotated and installed at the end of the T-shaped slide (412). Finally, the top pressure block (49) is installed on the connecting rod one (47) and the connecting rod two (48). The positioning push plate (44) is driven to move by the electric push rod (43), and the drive sleeve (46) is driven to slide in sync under the linkage of the push plate insert (45) to complete the radial extension and retraction of the top pressure block (49). It is suitable for the center top pressure positioning of pipes of different diameters. The detachable center positioning component (4) can realize quick disassembly and assembly, and can quickly replace different parts for flexible adaptation according to different pipe specifications.

7. A center positioning device for processing circular pipes according to claim 1, characterized in that: The clamping drive assembly (5) further includes two sets of clamping guide rails (51) and two sets of clamping uprights (53) fixedly disposed on the upper end of the sliding support (14). Two sets of guide rail sliders (52) are slidably disposed on the clamping guide rails (51), and two sets of clamping mechanisms (6) are respectively fixedly installed on the two sets of guide rail sliders (52). A bidirectional lead screw (55) is rotatably installed between the two sets of clamping uprights (53), and a clamping motor (54) for driving the bidirectional lead screw (55) to rotate is fixedly installed on one set of clamping uprights (53). Two sets of threaded seats (58) are threadedly connected to the bidirectional lead screw (55), and the two sets of threaded seats (58) are respectively fixedly connected to the lower end of the clamping mechanism (6).

8. A center positioning device for processing circular pipes according to claim 7, characterized in that: The clamping mechanism (6) includes a clamping frame (61) fixedly mounted on a threaded seat (58). A rotating seat (63) is rotatably mounted on the upper part of the clamping frame (61). A clamping motor (64) for driving the rotating seat (63) to rotate is fixedly mounted on the outer side wall of the clamping frame (61). A rotating bracket (65) is fixedly mounted on the rotating seat (63). A bearing sleeve (66) is fixedly mounted on the rotating bracket (65). A clamping shaft (67) is rotatably mounted inside the bearing sleeve (66) through a bearing. A clamping pressure roller (68) for pressing the pipe is fixedly mounted at both ends of the clamping shaft (67).

9. A center positioning device for processing circular pipes according to claim 1, characterized in that: The support mechanism (7) includes a support base (71) fixedly installed on the upper end of the connecting support (15), a support base plate (72) fixedly provided on the upper end of the support base (71), and an arc groove (73) for placing a pipe of fixed diameter provided on the upper end of the support base plate (72). A vertically upward support cylinder (74) is fixedly installed on the upper end of the support base (71). A lifting connecting rod (75) is fixedly connected to the output end of the support cylinder (74). Both ends of the lifting connecting rod (75) are rotatably connected to a rotating arm (76). The middle part of the rotating arm (76) is rotatably connected to the support base plate (72) through a first pin (77). A support block (79) for supporting the pipeline is rotatably installed at the end of the rotating arm (76) away from the lifting connecting rod (75) through a second pin (78).

10. The method of using a positioning device for a circular pipe machining center according to claim 1, characterized in that: Includes the following steps: Step 1: First, set the clamping mechanism (6) and the support mechanism (7) in the middle of the device base (1), and place the pipe that needs to be centered on the two sets of support mechanisms (7); Step 2: The lifting adjustment component (3) on one side is moved to the end of the pipe by translation drive (2), and the lifting adjustment component (3) on that side drives the center positioning component (4) set on it to be inserted into the pipe. Then, the positioning push plate (44) is moved by electric push rod (43), and the drive sleeve (46) is moved synchronously under the linkage of push plate insert plate (45) to complete the radial extension and retraction of the top pressure block (49), so that multiple sets of top pressure blocks (49) are pressed against the inner wall of the pipe to complete the center positioning of one side of the pipe. Step 3: Then, driven by the clamping drive assembly (5), the clamping mechanism (6) and the support mechanism (7) move toward the lifting adjustment assembly (3) on the other side and stop when they are close to the end of the pipe. The support height of the support mechanism (7) on the pipe is adjusted to make the pipe horizontal. The horizontal state can be determined with the help of a level. After the horizontal state is adjusted, the two sets of support mechanisms (7) are adjusted to clamp the upper part of the pipe so that the pipe is fixed. Step 4: Then another set of lifting adjustment components (3) moves toward the pipe under the drive of translation drive (2), so that the center positioning component (4) on it is inserted into the pipe. Then the inner wall of the pipe is squeezed and clamped by the center positioning component (4) to complete the center positioning of both ends of the pipe. The clamping mechanism (6) and the support mechanism (7) not only assist the center positioning of the pipe, but also maintain the stability of the pipe during the subsequent processing of the pipe.

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