High pressure pipe bevel milling machine

Abstract

This invention relates to the field of pipeline processing equipment technology and discloses a high-pressure pipeline beveling and milling machine, comprising: a centering and lifting component for supporting and initially positioning the high-pressure pipeline; an outer ring slidably disposed along the axial direction of the centering and lifting component; a rotary drive mechanism including a support toothed ring rotatably disposed on the outer ring and a drive assembly for driving the support toothed ring to rotate; a radial adaptive mechanism including a sliding shell fixed to the support toothed ring, a sliding rod slidable radially along the sliding shell, and a U-shaped frame connecting the sliding rod; and an integrated internal and external clamping and detection mechanism including a second electric push rod disposed on the U-shaped frame, a conductive plate insulated and installed on the telescopic end of the second electric push rod, and a guide wheel rotatably installed on the conductive plate, wherein the guide wheel has both clamping transmission and conductive detection functions. This invention achieves integrated automatic positioning, centering, detection, and protection for high-pressure pipeline beveling and milling, with convenient clamping, high precision, enhanced safety, and improved adaptability.

Description

Technical Field

[0001] This invention relates to the field of pipeline processing equipment technology, specifically a high-pressure pipeline beveling and milling machine. Background Technology

[0002] High-pressure pipeline beveling is a key process in the processing, manufacturing, and on-site installation of pressure pipelines, directly affecting the subsequent welding quality and pressure-bearing operation safety. This process is mainly used to bevele the ends of thick-walled high-pressure pipelines to meet the requirements of welding assembly and sealing pressure.

[0003] Traditional high-pressure pipeline beveling equipment mostly uses manual-assisted alignment and external drive methods. Although basic processing can be completed through manual adjustment and simple clamping, the clamping and positioning process is cumbersome and the alignment efficiency is low. Even with a conventional centering structure, it is difficult to eliminate the processing error caused by clamping eccentricity. At the same time, there is a lack of means to detect the roundness of the pipeline, resulting in unstable processing accuracy. It cannot meet the high-quality and high-safety processing requirements of high-pressure pipelines. Therefore, a high-pressure pipeline beveling milling machine is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-pressure pipeline beveling milling machine to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-pressure pipeline beveling and milling machine, comprising:

[0006] The centering support is used to support and initially position the high-pressure pipeline;

[0007] The outer ring is slidably disposed along the axial direction of the centering support member;

[0008] A rotary drive mechanism includes a support gear ring rotatably disposed on an outer ring and a drive assembly for driving the support gear ring to rotate.

[0009] The radial adaptive mechanism includes a sliding housing fixed to a supporting toothed ring, a sliding rod that slides radially along the sliding housing, and a U-shaped frame connecting the sliding rod;

[0010] The integrated internal and external clamping and detection mechanism includes a second electric push rod mounted on a U-shaped frame, a conductive plate insulated and installed on the telescopic end of the second electric push rod, and a guide wheel rotatably mounted on the conductive plate. The guide wheel has both clamping transmission and conductive detection functions. The conductive plate is electrically connected to a stationary controller through a rotating conductive interface. The outer circumferential surface of the guide wheel is in contact with the inner and outer walls of the high-pressure pipeline, realizing the integration of bidirectional clamping and conductive detection of the pipeline, improving positioning accuracy and detection reliability. The second electric push rod has a built-in load feedback component for collecting the contact pressure signal between the guide wheel and the pipe wall.

[0011] A time-controlled grounding mechanism includes conductive posts that selectively contact the outer wall of the pipe and an electromagnetic on / off switch that controls the grounding on / off state.

[0012] The milling actuator is housed within the U-shaped frame;

[0013] The controller is electrically connected to the conductive plate, the load feedback component of the second electric push rod, and the electromagnetic on / off switch, and determines the pipeline status based on the combined changes of the conductive signal and the load signal.

[0014] The controller is bolted to the outside of the geared motor housing.

[0015] Preferably, it includes a geared motor fixed to the outside of the outer ring by a frame, and a drive gear installed at the output end of the geared motor and meshing with the support gear ring, so as to achieve stable rotational drive with high torque.

[0016] Preferably, a conductive bracket is provided between the conductive plate and the guide wheel, and the conductive plate and the guide wheel are rotatably connected through the conductive bracket, and the outer surface of the guide wheel is coated with a conductive coating.

[0017] Preferably, the centering support includes a support bed, inclined blocks symmetrically arranged on both sides of the top of the support bed, and support columns at the four corners of the lower end of the support bed; the insulated inclined blocks are made of high-strength insulating nylon material, the inclination angle is set at 35°, and the surface is textured with anti-slip texture, which allows the high-pressure pipeline to automatically slide to the center to complete the centering when placed, while realizing the electrical insulation between the pipeline and the support bed, avoiding interference with conductivity detection; the support columns are made of carbon steel material, with anti-slip texture at the bottom, to stably support the whole machine and ensure stable operation of the equipment; the conductive columns of the time-controlled grounding mechanism include a first conductive column and a second conductive column whose lifting is controlled by a third electric push rod, and the bottoms of the first conductive column and the second conductive column are fixed to the top of the third electric push rod by a support plate; the third electric push rod is installed in the bottom groove opened near the centerline of the high-pressure pipeline on the support bed;

[0018] The output terminal of the electromagnetic switch is equipped with a grounding wire. A conductive ring is fitted around the outside of each of the support columns, with the inner wall of the conductive ring fitting snugly against the outer wall of the support column. The conductive ring is electrically connected to the grounding wire. The conductive ring is made of copper and has an interference fit with the support column; the tight fit of the inner wall ensures stable conductivity. The grounding wire is a multi-strand copper core flexible wire, with one end welded to the conductive ring and the other end electrically connected to the electromagnetic switch. The conductive ring is connected to the ground through the support column, allowing for rapid release of milling static electricity, preventing static buildup and potential safety hazards, without affecting the supporting function of the support column.

[0019] Preferably, guide rods are provided at both ends of the opening of the U-shaped frame. The guide rods are V-shaped and radiate towards the pipe wall of the high-pressure pipeline. The guide rods are fixedly connected to the U-shaped frame. The guide rods are made of wear-resistant alloy steel, with a V-angle of 60° and R3 rounded corners at the ends to avoid scratching the pipe wall. When the pipeline is close, the guide rods first contact the pipe wall and guide the U-shaped frame to move radially, automatically adapting to different pipe diameters and improving the adaptability and convenience of clamping.

[0020] Preferably, sliders are welded to both sides of the lower end of the outer ring, and guide rods are welded and fixed to both sides of the front end of the support bed. The sliders are slidably connected to the guide rods. A locking bolt is provided on the outer side of the slider, and the locking bolt passes through the slider and extends to the outer wall of the guide rod. The locking bolt and the slider are connected by a threaded engagement. The locking bolt has an internal hexagonal cylindrical head structure, and a high-friction rubber pressure block is embedded at the end of the bolt. When tightened, the pressure block presses against the outer wall of the guide rod, locking the slider by friction to prevent axial displacement of the outer ring during milling and ensure machining positioning accuracy. After loosening, the position of the outer ring can be smoothly adjusted by sliding.

[0021] Preferably, the milling actuator includes a fixture installed in the through slot of a U-shaped frame, whose feed is controlled by a first electric push rod, and a milling head fixed by the fixture. The milling surface of the milling head faces the high-pressure pipeline. The fixture locks the milling head with a set screw, allowing for quick replacement to adapt to different bevel machining. The first electric push rod is a servo push rod, which can precisely control the feed stroke, push the fixture to drive the milling head to feed, accurately control the bevel depth, and precisely match the milling surface with the machining angle to ensure the bevel machining quality.

[0022] Preferably, the rotating conductive interface is a slip ring, the guide wheels are four in a rectangular arrangement, and the conductive plate is connected to the four signal channels of the slip ring by independent leads.

[0023] Preferably, the controller is configured as follows:

[0024] A circle is defined as a condition where all multiple conductive signals are on and the load pressure is stable.

[0025] When any conductive signal is disconnected and the load pressure fluctuates synchronously, it is determined to be out of round.

[0026] When the conductive signal gradually deteriorates and the load pressure remains stable, it is determined that the contact is worn and compensation is performed.

[0027] A method for beveling high-pressure pipelines, using the aforementioned milling machine, includes:

[0028] The pipe is initially positioned using the centering support.

[0029] The sliding outer ring approaches the pipe, and the guide causes the U-shaped frame to radially adaptively wrap around the pipe wall;

[0030] The second electric push rod is driven to clamp the pipe inside and outside the guide wheel, forming a detection circuit;

[0031] Multiple detection signals are transmitted via a rotary conductive interface during rotational motion.

[0032] Roundness is determined by combining the conductivity signal and the load signal;

[0033] The timing is switched to grounding state to perform bevel milling.

[0034] Compared with the prior art, the present invention provides a high-pressure pipeline beveling milling machine, which has the following beneficial effects:

[0035] This invention achieves automatic centering and positioning of high-pressure pipelines during placement through a centering support component, realizes rotary transmission through an external rotary drive structure formed by a rotary drive mechanism, achieves pipe diameter adaptation and eccentricity compensation through a radial adaptive mechanism formed by a sliding shell, sliding rod and U-shaped frame, and performs internal and external clamping and detection work through an integrated internal and external clamping and detection mechanism. The integrated internal and external clamping and detection mechanism, combined with a time-controlled grounding mechanism, detects out-of-roundness of high-pressure pipelines and releases static electricity. Through the coordinated operation of the above structures, it realizes the integrated operation of rapid positioning, automatic centering, conductivity detection and safety protection for high-pressure pipeline beveling and milling. It has the advantages of simple clamping, accurate positioning, stable operation and strong adaptability, and effectively solves the technical problems of traditional beveling equipment such as cumbersome clamping, difficult alignment, difficulty in compensating for eccentricity errors and lack of real-time roundness detection. Attached Figure Description

[0036] Figure 1 This is a perspective view of the overall structure of the present invention;

[0037] Figure 2 This is a cross-sectional view of the centering and lifting component structure of the present invention;

[0038] Figure 3 This is a perspective view of the U-shaped frame structure of the present invention;

[0039] Figure 4 This is a cross-sectional view of the U-shaped frame and high-pressure pipeline of the present invention.

[0040] Figure 5 This is a schematic diagram of the high-pressure pipeline and the machine body of the present invention.

[0041] In the diagram: 1. Outer ring; 2. Supporting toothed ring; 3. Sliding shell; 4. Sliding rod; 5. U-shaped frame; 6. Support bed; 7. Inclined support block; 8. Guide rod; 9. Slider; 10. Gear motor; 11. Drive gear; 12. Controller; 13. Electromagnetic conduction switch; 14. Grounding wire; 15. First electric push rod; 16. Fixture; 17. Through slot; 18. Milling head; 19. Second electric push rod; 20. Conductive plate; 21. Conductive bracket; 22. Guide wheel; 23. Conductive coating; 24. Bottom groove; 25. Third electric push rod; 26. Support plate; 27. First conductive post; 28. Second conductive post; 29. ​​Conductive ring; 30. Support column; 31. Guide rod. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention provides a technical solution: a high-pressure pipeline beveling and milling machine. Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,include:

[0044] The centering support is used to support and initially position the high-pressure pipeline;

[0045] Outer ring 1 is slidably set along the axial direction of the centering support component;

[0046] The rotary drive mechanism includes a support gear ring 2 rotatably disposed on the outer ring 1 and a drive assembly for driving the support gear ring 2 to rotate.

[0047] The radial adaptive mechanism includes a sliding shell 3 fixed to the supporting toothed ring 2, a sliding rod 4 that slides radially along the sliding shell 3, and a U-shaped frame 5 connecting the sliding rod 4. The sliding rod 4 and the sliding shell 3 are in radial clearance sliding fit. The inner wall of the sliding shell 3 is provided with a guide groove. The sliding rod 4 moves radially linearly along the groove to realize the U-shaped frame 5 adaptively to the pipe diameter.

[0048] The integrated internal and external clamping and detection mechanism includes a second electric push rod 19 mounted on the U-shaped frame 5, a conductive plate 20 insulatedly mounted on the telescopic end of the second electric push rod 19, and a guide wheel 22 rotatably mounted on the conductive plate 20. The guide wheel 22 has both clamping transmission and conductive detection functions. The conductive plate 20 is electrically connected to the stationary controller 12 through a rotating conductive interface. The conductive plate 20 is a rectangular sheet with rounded corners. The substrate is made of epoxy fiberglass insulating board with a copper conductive layer on the surface. A conductive bracket 21 is fixed on the inner side of the conductive plate 20. The second electric push rod 19 has a built-in pressure sensor-type load feedback component to collect the contact pressure between the guide wheel and the pipe wall in real time.

[0049] A time-controlled grounding mechanism includes a conductive post that selectively contacts the outer wall of the pipe and an electromagnetic on / off switch 13 that controls the grounding on / off state.

[0050] The milling actuator is housed within the U-shaped frame 5;

[0051] The controller 12 is electrically connected to the conductive plate 20, the load feedback component of the second electric push rod 19, and the electromagnetic on / off switch 13, and determines the pipeline status based on the combined changes of the conductive signal and the load signal.

[0052] Please see Figure 1 and Figure 2 The drive assembly includes a geared motor 10 fixed to the outside of the outer ring 1 via a frame, and a drive gear 11 mounted on the output end of the geared motor 10 and meshing with the support gear ring 2.

[0053] A conductive bracket is provided between the conductive plate and the guide wheel, and the conductive plate and the guide wheel are rotatably connected through the conductive bracket. The outer surface of the guide wheel 22 is coated with a conductive coating 23, which is a silver-based conductive graphite composite coating. The controller 12 has a built-in constant current source module, which outputs a constant current to the guide wheel detection circuit. The contact resistance between the guide wheel and the pipe wall is calculated and monitored in real time by collecting the voltage at both ends of the detection circuit. After wear, the contact resistance gradually increases from the initial ≤5mΩ to ≤50mΩ. The second electric push rod 19 extends slightly to compensate for the gap. When the resistance exceeds 100mΩ, the controller 12 triggers an audible and visual replacement prompt.

[0054] Please see Figure 2The centering support includes a support bed 6, inclined support blocks 7 symmetrically arranged on both sides of the top of the support bed 6, and support columns 30 arranged at the four corners of the lower end of the support bed 6. The two sets of insulated inclined support blocks 7 are inclined relative to each other to form a V-shaped support surface. The inclined support blocks 7 make it easy to center the high-pressure pipeline placed between the two inclined support blocks 7 when using suspension equipment such as cranes. The conductive columns of the time-controllable grounding mechanism include a first conductive column 27 and a second conductive column 28 whose lifting is controlled by a third electric push rod 25. The bottom of the first conductive column 27 and the second conductive column 28 are fixed to the top of the third electric push rod 25 by a support plate 26. The third electric push rod 25 is installed in the bottom groove 24 opened near the centerline of the high-pressure pipeline in the support bed 6.

[0055] The output terminal of the electromagnetic switch 13 is provided with a grounding wire 14. A conductive ring 29 is sleeved on the outside of any support column 30, and the inner wall of the conductive ring 29 is in contact with the outer wall of the support column 30. The conductive ring 29 is electrically connected to the grounding wire 14, and the support column 30 is in contact with the ground. The conductive ring 29 and the grounding wire 14 work together to achieve the grounding release of static electricity.

[0056] Please see Figure 1 and Figure 3 Guide rods 31 are provided at both ends of the opening of the U-shaped frame 5. The guide rods 31 are V-shaped and radiate towards the pipe wall of the high-pressure pipeline. The guide rods 31 are fixedly connected to the U-shaped frame 5. With the setting of the guide rods 31, when the U-shaped frame 5 is close to the pipe wall of the high-pressure pipeline, the pipe wall contacts the guide rods 31. Under the guidance of the guide rods 31, the U-shaped frame 5 is driven to move radially inside the sliding shell 3 through the sliding rod 4 to automatically adapt to high-pressure pipelines of different diameters. When the outer ring 1 is pushed close to the pipeline, the supporting toothed ring 2 and the U-shaped frame 5 are both stationary. The guide rods 31 contact the pipe wall and guide the U-shaped frame 5 to move radially along the sliding shell 3 to complete the pipe diameter self-adaptation, initial centering, and clamping and centering of the inner and outer guide wheels 22. This step is static throughout and is only for preparation for testing.

[0057] After positioning and clamping, the geared motor drives the support gear ring 2 to rotate at low speed. The U-shaped frame 5, guide wheel 22, conductive plate 20, and guide rod 31 rotate synchronously at low speed with the support gear ring 2, and cooperate with the slip ring to achieve rotational conductivity. The controller 12 continuously collects signals to complete the full circumferential out-of-roundness detection.

[0058] Please see Figure 1 , Figure 2 and Figure 5The lower ends of the outer ring 1 are welded with sliders 9 on both sides. The front ends of the support bed 6 are welded with guide rods 8 on both sides. The sliders 9 and guide rods 8 are slidably connected. Locking bolts are provided on the outer side of the sliders 9. The locking bolts pass through the sliders 9 and extend to the outer wall of the guide rods 8. The locking bolts and sliders 9 are connected by threaded engagement. After the sliders 9 move by the locking bolts, the locking bolts are tightened to fix the sliders 9 to the outside of the guide rods 8, preventing the sliders 9 and the outer ring 1 from being displaced and affecting the bevel milling. The sliders 9 and guide rods 8 are slidably connected by clearance fit. The inner wall of the sliders 9 is provided with linear bearings that fit against the outer wall of the guide rods 8, and the sliding is smooth without jamming.

[0059] Please see Figure 3 and Figure 4 The milling actuator is located in the through slot 17 in the middle of the U-shaped frame 5. The milling actuator includes a clamp 16 whose feed is controlled by a first electric push rod 15 and a milling head 18 fixed by the clamp 16. The milling surface of the milling head 18 faces the high-pressure pipeline. The first electric push rod 15 controls the feed of the milling head 18 during the milling process to achieve depth control of the bevel.

[0060] Please see Figure 3 The rotating conductive interface is a current collector slip ring, and there are four guide wheels 22 arranged in a rectangular shape. The conductive plate 20 is connected to the four signal channels of the slip ring through independent leads. The slip ring stator is fixed to the outer ring 1, and the rotor rotates synchronously with the support toothed ring 2. The detection circuit achieves continuous circuit conduction in the rotating state through the slip ring brush.

[0061] Please see Figure 1 Controller 12 is configured as follows:

[0062] A circle is defined as a condition where all multiple conductive signals are on and the load pressure is stable.

[0063] When any conductive signal is disconnected and the load pressure fluctuates synchronously, it is determined to be out of round.

[0064] When the conductive signal gradually deteriorates and the load pressure remains stable, it is determined that the contact is worn and compensation is performed.

[0065] A method for beveling high-pressure pipelines, using the aforementioned milling machine, includes:

[0066] The pipe is initially positioned using the centering support.

[0067] The sliding outer ring 1 is close to the pipe, and the U-shaped frame 5 is guided to radially adaptively wrap around the pipe wall;

[0068] The second electric push rod 19 is driven to cause the guide wheel 22 to clamp the pipe inside and outside, forming a detection circuit;

[0069] Multiple detection signals are transmitted via a rotary conductive interface during rotational motion.

[0070] Roundness is determined by combining the conductivity signal and the load signal;

[0071] The timing is switched to grounding state to perform bevel milling.

[0072] This solution involves using lifting equipment to hoist the high-pressure pipeline to the centering support. The high-pressure pipeline automatically centers under the action of the inclined blocks 7 on both sides, with the end to be milled facing the outer ring 1 and extending beyond the end of the inclined block 7, completing the initial positioning. The outer ring 1 is then pushed along the guide rod 8 towards the high-pressure pipeline, activating the radial adaptive mechanism. The guide rod 31 at the end of the U-shaped frame 5 contacts the pipe wall and generates radial thrust, causing the U-shaped frame 5 to slide within the sliding shell 3 via the slide rod 4, automatically adapting to the pipe diameter and wrapping around both the inner and outer sides of the pipe wall. At this point, the slider 9 is locked to the guide rod 8. This mechanism achieves circumferential forced synchronous transmission and radial floating adaptive force, compensating for clamping eccentricity errors and ensuring that the milling trajectory is coaxial with the pipe axis. Subsequently, the integrated internal and external clamping and detection mechanism (second electric push rod 19, guide wheel 22, conductive coating 23) is activated. The second electric push rod 19 drives the outer wall guide wheel 22 and the inner wall guide wheel 22 to move respectively, forming a bidirectional clamping mechanism. This allows the U-shaped frame 5 to rotate around the actual axis of the pipe. The guide wheel 22 has both clamping transmission and conductive detection functions, providing a stable contact basis for out-of-roundness detection. A slip ring is assembled between the supporting gear ring 2 and the outer ring 1. The slip ring stator is fixed to the outer ring 1, and the rotor rotates synchronously with the supporting gear ring 2. The detection circuit achieves continuous circuit conduction in the rotating state through the slip ring brush. A multi-channel slip ring is installed at the joint surface between the supporting gear ring 2 and the outer ring 1. The slip ring stator is fixed to the stationary end of the outer ring 1 by bolts, and the slip ring rotor rotates synchronously with the supporting gear ring 2. The conductive plate 20 is connected to the corresponding channel of the slip ring rotor through a high-temperature shielded wire. The slip ring stator channel is connected to the signal acquisition terminal of the controller 12 through a fixed cable to achieve continuous conduction of the detection circuit in the rotating state. The controller 12 is powered by an independent DC power supply, which is connected to the dedicated power channel of the slip ring after passing through the power isolation module to power the conductive detection component on the rotating side. The detection signal and the power supply are transmitted independently through different channels of the slip ring without cross interference.

[0073] After the outer ring 1 is locked, the rotary drive mechanism (support gear ring 2, reduction motor 10, drive gear 11) is started, and the conductive out-of-round detection mechanism (first conductive post 27, conductive plate 20, conductive bracket 21, controller 12) is started simultaneously. The controller 12 controls the third electric push rod 25 to push the support plate 26 up, so that the first conductive post 27 is in contact with the outer wall of the high-pressure pipeline and conducts electricity (at this time, the second conductive post 28 is in contact with the outer wall of the high-pressure pipeline but not in contact with the grounding wire 14). The four guide wheels 22 with conductive coating 23 on the surface form four independent detection circuits. The controller 12 has a built-in DC-DC isolated power supply module. The detection circuit is electrically isolated from the power supply circuit through an optocoupler. The conductive plates 20 of the four guide wheels 22 are independent leads. The first conductive post 27 is the common pole of the detection circuit. The controller 12 adopts a dual-criteria detection principle. After the four independent detection signals are transferred by the slip ring, they are connected to the four independent acquisition ports of the controller 12 through shielded cables to complete the collection. All four circuits are conductive and If the load feedback pressure value of the second electric push rod 19 is stable, it is determined to be a perfect circle. If any circuit is broken and the pressure value fluctuates synchronously, it is determined to be a pipe out of roundness. If only the circuit is broken and there is no pressure fluctuation, it is determined to be a circuit fault. When there is a loss of roundness or a fault, the controller 12 immediately stops the machine and alarms, controls the second electric push rod 19 to retract the guide wheel 22, and the operator moves the outer ring 1 away along the guide rod 8, handles the pipeline or repairs it and reloads the material. During the detection process, the second electric push rod 19 has built-in compensation threshold and loss of roundness threshold. When the wear of the guide wheel 22 causes the contact resistance to be lower than the compensation threshold, the wear of the outer conductive coating 23 of the guide wheel 22 is gradual, the contact resistance rises slowly and the load pressure changes steadily and gradually, and the controller 12 performs compensation. Loss of roundness is abrupt, the contact resistance is broken instantly and the load pressure changes suddenly, the controller 12 determines loss of roundness and stops the machine, the controller 12 controls the second electric push rod 19 to extend slightly out of the compensation gap, maintain physical contact and does not determine loss of roundness. Only when the resistance exceeds the loss of roundness threshold or the circuit is continuously disconnected will it be determined to be out of roundness or stuck and trigger the shutdown protection.

[0074] After the pipe is determined to be perfectly round, the conductive out-of-roundness detection mechanism is closed, and the milling operation is started. The reduction motor 10 meshes with the support gear ring 2 through the drive gear 11, and the reduction and torque increase output high torque rotational power to meet the heavy-duty milling requirements of thick-walled pipes. The support gear ring 2 drives the sliding shell 3 and the U-shaped frame 5 to rotate synchronously. When the milling operation starts, the phased electrostatic protection mechanism (second conductive column 28, electromagnetic conduction switch 13, grounding wire 14, conductive ring 29, and support column 30) is activated at the same time. The controller 12 controls the electromagnetic conduction switch 13 to connect the electrostatic discharge path. The static electricity generated during milling is released through the high-pressure pipe, the second conductive column 28, the grounding wire 14, the conductive ring 29, and the support column 30 to ground, ensuring processing safety. The response time of the electromagnetic conduction switch 13 is ≤10ms. It is disconnected during the detection stage and closed synchronously during the milling stage. It is immediately disconnected when the machine stops, and it is completely synchronized with the start and stop cycle of milling.

[0075] The fixed milling actuator (first electric push rod 15, clamp 16, milling head 18) performs milling synchronously. The milling head 18 is a non-powered fixed structure. The first electric push rod 15 controls the axial feed of the milling head 18 and adjusts the bevel milling depth. The clamp 16 is locked and unlocked by bolts and other fasteners, which facilitates the replacement of the milling head 18 and the adjustment of the fixed position of the milling head 18. In this scheme, the guide wheel 22 is only used to clamp the pipe wall and center the milling trajectory. The adjustment of the milling center is not achieved through the guide wheel 22, but only through the clamp 16 that limits the milling head 18.

[0076] The milling head 18 rotates around the pipe with the U-shaped frame 5 to complete the beveling process. If there is a dent or damage on the end face of the pipe being milled, the first electric push rod 15 can adjust the stroke of the milling head 18 to remove the damaged part. Even if the out-of-roundness detection is skipped and milling is carried out directly, the second electric push rod 19 has a built-in load feedback component that still monitors the resistance in real time and transmits the voltage to the controller 12 through the slip ring. It shares a rotary interface with the conductivity detection. When the pipe is out of roundness or the end face is deformed, causing the guide wheel 22 to get stuck, the load signal is immediately transmitted to the controller 12. The controller 12 uses an embedded main control chip and integrates signal acquisition and drive output modules. After receiving the abnormal load signal, it immediately cuts off the drive circuit of the reduction motor 10 and triggers an alarm, shuts down the reduction motor 10, alarms, and retracts the guide wheel 22 to achieve dual safety protection.

[0077] After milling is completed, the electrostatic discharge channel is closed, the first electric push rod 15 drives the milling head 18 to retract axially, the second electric push rod 19 retracts to make the guide wheel 22 separate from the inner and outer walls of the pipe, the locking bolt of the slider 9 is loosened, the outer ring 1 is moved backward along the guide rod 8 away from the pipe, the high-pressure pipe that has been processed is lifted off by the lifting equipment, and then the new pipe is lifted to the centering support. The out-of-roundness detection, centering clamping, milling processing and unloading process are repeated to enter the next round of milling process.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure pipeline beveling and milling machine, characterized in that, include: The centering support is used to support and initially position the high-pressure pipeline; The outer ring (1) is slidably disposed along the axial direction of the centering support member; The rotary drive mechanism includes a support gear ring (2) rotatably disposed on the outer ring (1) and a drive assembly for driving the support gear ring (2) to rotate; The radial adaptive mechanism includes a sliding shell (3) fixed to the support toothed ring (2), a sliding rod (4) that slides radially along the sliding shell (3), and a U-shaped frame (5) connecting the sliding rod (4). The integrated internal and external clamping and detection mechanism includes a second electric push rod (19) set on the U-shaped frame (5), a conductive plate (20) insulatedly installed on the telescopic end of the second electric push rod (19), and a guide wheel (22) rotatably installed on the conductive plate (20). The guide wheel (22) has both clamping transmission and conductive detection functions. The conductive plate (20) is electrically connected to the stationary controller (12) through a rotating conductive interface. The timing-controlled grounding mechanism includes a conductive post that selectively contacts the outer wall of the pipe and an electromagnetic on / off switch (13) that controls the grounding on / off. The milling actuator is housed within the U-shaped frame (5); The controller (12) is electrically connected to the conductive plate (20), the load feedback component of the second electric push rod (19), and the electromagnetic on switch (13), and determines the pipeline status based on the combined change of the conductive signal and the load signal.

2. The high-pressure pipeline beveling milling machine according to claim 1, characterized in that: The drive assembly includes a geared motor (10) fixed to the outside of the outer ring (1) by a frame, and a drive gear (11) installed at the output end of the geared motor (10) and meshing with the support gear ring (2).

3. A high-pressure pipeline beveling and milling machine according to claim 1, characterized in that: A conductive bracket (21) is provided between the conductive plate (20) and the guide wheel (22), and the conductive plate (20) and the guide wheel (22) are rotatably connected through the conductive bracket (21). The outer surface of the guide wheel (22) is coated with a conductive coating (23).

4. A high-pressure pipeline beveling and milling machine according to claim 1, characterized in that: The centering and lifting components include a support bed (6), inclined support blocks (7) symmetrically arranged on both sides of the top of the support bed (6), and support columns (30) arranged at the four corners of the lower end of the support bed (6). The conductive columns of the time-controlled grounding mechanism include a first conductive column (27) and a second conductive column (28) controlled by a third electric push rod (25). The bottoms of the first conductive column (27) and the second conductive column (28) are fixed to the top of the third electric push rod (25) by a support plate (26). The third electric push rod (25) is installed inside the bottom groove (24) opened near the centerline of the high-pressure pipeline in the support bed (6). The output end of the electromagnetic switch (13) is provided with a grounding wire (14), and a conductive ring (29) is sleeved on the outside of any of the support columns (30), and the inner wall of the conductive ring (29) is in contact with the outer wall of the support column (30). The conductive ring (29) is electrically connected to the grounding wire (14).

5. A high-pressure pipeline beveling milling machine according to claim 1, characterized in that: The U-shaped frame (5) has guide rods (31) at both ends of the opening. The guide rods (31) are V-shaped and radiate outward toward the wall of the high-pressure pipeline. The guide rods (31) are fixedly connected to the U-shaped frame (5).

6. A high-pressure pipeline beveling and milling machine according to claim 4, characterized in that: The lower ends of the outer ring (1) are welded with sliders (9) on both sides. The front ends of the support bed (6) are welded with guide rods (8) and the sliders (9) are slidably connected to the guide rods (8). The outer side of the sliders (9) is provided with locking bolts, which penetrate the sliders (9) and extend to the outer wall of the guide rods (8). The locking bolts and the sliders (9) are connected by threaded engagement.

7. A high-pressure pipeline beveling and milling machine according to claim 1, characterized in that: The milling actuator is located in the through slot (17) in the middle part of the U-shaped frame (5). The milling actuator includes a clamp (16) whose feed is controlled by a first electric push rod (15) and a milling head (18) fixed by the clamp (16). The milling surface of the milling head (18) faces the high-pressure pipeline.

8. A high-pressure pipeline beveling and milling machine according to claim 1, characterized in that: The rotating conductive interface is a current collector slip ring, the guide wheels (22) are four in a rectangular arrangement, and the conductive plate (20) is connected to the four signal channels of the slip ring by independent leads.

9. A high-pressure pipeline beveling and milling machine according to claim 1, characterized in that: The controller (12) is configured as follows: A circle is defined as a condition where all multiple conductive signals are on and the load pressure is stable. When any conductive signal is disconnected and the load pressure fluctuates synchronously, it is determined to be out of round. When the conductive signal gradually deteriorates and the load pressure remains stable, it is determined that the contact is worn and compensation is performed.

10. A method for beveling high-pressure pipelines, characterized in that: Using the milling machine according to any one of claims 1-9, comprising: The pipe is initially positioned using the centering support. The sliding outer ring (1) approaches the pipe, and the U-shaped frame (5) is guided to radially adaptively wrap around the pipe wall; Drive the second electric push rod (19) to make the guide wheel (22) clamp the pipe inside and outside to form a detection circuit; Multiple detection signals are transmitted via a rotary conductive interface during rotational motion. Roundness is determined by combining the conductivity signal and the load signal; The timing is switched to grounding state to perform bevel milling.

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