An apparatus for automated in-service pipeline polishing and roll press strengthening and methods of use thereof

Abstract

This invention relates to the field of precision machining and strengthening technology for cylindrical workpiece surfaces, specifically to an automated in-service pipe polishing and rolling strengthening device and its usage method. The device includes an outer frame, a grinding mechanism fixed above the front end of the outer frame, double ball-head rolling mechanisms fixed on the left and right sides of the front end of the outer frame, several telescopic rods fixed inside the outer frame, universal wheels fixedly connected to the telescopic rods, and a first clamping mechanism and a second clamping mechanism disposed inside the outer frame. This invention can realize integrated processing of pipe surface polishing and rolling strengthening, and has the characteristics of adaptive pipe diameter, omnidirectional movement, firm positioning, and strong on-site adaptability.

Description

Technical Field

[0001] This invention belongs to the field of precision machining and strengthening technology for cylindrical workpiece surfaces, specifically relating to an automated in-service pipe polishing and rolling strengthening device and its usage method. Background Technology

[0002] In the life extension treatment of petrochemical, nuclear power, shipbuilding, pressure vessels and long-distance in-service pipelines, it is necessary to grind the outer wall of the pipeline to remove defects, rust and oxide scale, and then strengthen the surface by mechanical rolling to improve its fatigue resistance, corrosion resistance and wear resistance.

[0003] Existing pipe polishing and rolling equipment has many defects: polishing and rolling equipment are independent of each other, requiring secondary clamping and positioning, which is cumbersome, has low processing efficiency, and has limited function; it is only suitable for pipes with fixed diameter, and tooling needs to be changed when the diameter changes, which is costly, time-consuming, and has poor versatility; grinding and rolling have large vibrations, which can easily cause uneven surface texture, reduced processing accuracy, and poor processing stability. It cannot move omnidirectionally around the pipeline, and conventional clamping is prone to loosening and slippage, making it difficult to guarantee on-site processing accuracy and resulting in poor processing stability. Since large equipment cannot enter the construction site, it can only process offline, limiting its application scenarios.

[0004] To address the aforementioned problems, this invention provides an automated in-service pipeline polishing and rolling strengthening device and its usage method that integrates polishing, rolling, adaptive pipe diameter, omnidirectional movement, and stable fixed positioning. Summary of the Invention

[0005] To address the problems of existing pipe outer wall processing and strengthening devices being limited in function, having low processing efficiency, being unable to adapt to pipes of different diameters, and having poor versatility and mobility, this invention provides an automated in-service pipe polishing and rolling strengthening device and its usage method, which realizes integrated processing of pipe surface polishing and rolling strengthening, and features adaptive pipe diameter, omnidirectional movement, firm positioning, and strong field adaptability.

[0006] The technical solution of the present invention is as follows: An automated in-service pipe polishing and rolling strengthening device includes an outer frame, a grinding mechanism fixed above the front end of the outer frame, a double ball-head rolling mechanism fixed on the left and right sides of the front end of the outer frame, several telescopic rods fixed inside the outer frame, casters fixedly connected to the telescopic rods, and a first clamping mechanism and a second clamping mechanism disposed inside the outer frame.

[0007] Preferably, the outer frame is ring-shaped.

[0008] Preferably, the polishing mechanism includes a polishing motor fixedly connected to the upper front end of the outer frame, an adjusting slide fixedly connected to the rotating shaft of the polishing motor, and a polishing wheel slidably connected to the adjusting slide.

[0009] Preferably, the double ball head rolling mechanism includes a motor fixedly connected to the outer frame, a telescopic cylinder fixedly connected to the motor's rotating shaft, and a hard alloy ball head fixedly connected to the telescopic end of the telescopic cylinder.

[0010] Preferably, a pressure sensor is also fixed on the telescopic end of the cylinder.

[0011] Preferably, the caster wheel is a Mecana wheel, which is driven to rotate by a drive motor.

[0012] Preferably, the first clamping mechanism includes a first cylinder fixed to the inner wall of the outer frame and an upper pressure plate fixedly connected to the telescopic end of the first cylinder, the upper pressure plate being inverted U-shaped.

[0013] Preferably, the second clamping mechanism includes a second cylinder fixed to the lower left side of the inner wall of the outer frame, a first top plate fixedly connected to the telescopic end of the second cylinder, a third cylinder fixed to the lower right side of the inner wall of the outer frame, and a second top plate fixedly connected to the telescopic end of the third cylinder. The first top plate and the second top plate cooperate to support the workpiece.

[0014] Preferably, a Z-shaped electromagnetic adsorption mechanism is further provided between the upper pressure plate and the workpiece. The Z-shaped electromagnetic adsorption mechanism includes a magnetic upper plate and a magnetic lower plate. Electromagnetic chucks are provided in the magnetic upper plate and the magnetic lower plate. The magnetic upper plate has an upper sliding groove and the magnetic lower plate has a lower sliding groove. One end of a first connecting rod is slidably connected in the upper sliding groove. The other end of the first connecting rod is hinged to the magnetic lower plate. One end of a second connecting rod is slidably connected in the lower sliding groove. The other end of the second connecting rod is hinged to the magnetic upper plate. The second connecting rod is hinged to the middle of the first connecting rod.

[0015] A method for using the aforementioned automated in-service pipe polishing and rolling strengthening device is as follows: An annular outer frame is fitted over the pipe to be processed; the first and second clamping mechanisms work together to automatically center and clamp the pipe; the Z-shaped electromagnetic adsorption mechanism is adjusted to fit the outer wall of the pipe, and the electromagnetic chuck is energized to achieve adsorption between the device and the pipe; the universal wheels are adjusted to the appropriate pipe diameter position using the telescopic rod, the grinding wheel is adjusted using the adjusting slide, and the carbide ball head is adjusted to the working position using the telescopic cylinder; the grinding motor is started, and the grinding wheel performs pre-polishing treatment on the pipe surface; the double ball head rolling mechanism is started, and the carbide ball head performs rolling reinforcement on the polished pipe surface; the Mecanum wheel drive device moves omnidirectionally along the pipe axis and circumference to achieve continuous processing; after processing is completed, the electromagnetic chuck is de-energized to release the adsorption, the first and second clamping mechanisms are reset, and the device is removed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention integrates polishing and rolling strengthening into the same device, and completes the two processes in one clamping, thereby improving processing efficiency and surface consistency; (2) In the embodiments of the present invention, by designing a telescopic rod, an adjusting slide, and a telescopic cylinder for coordinated adjustment, it can be adapted to pipes of different diameters and has strong versatility; (3) In the embodiments of the present invention, a Mecanum wheel is used to enable the device to move around the pipeline in any direction, thus satisfying the continuous processing of long-distance pipelines; (4) In the embodiments of the present invention, the dual clamping mechanism is combined with the Z-type electromagnetic adsorption mechanism, so that there is no loosening or slippage during the processing, thus ensuring the processing accuracy; (5) The present invention has a compact structure, does not require the assistance of large machine tools, can be directly operated on construction sites and factory areas, has a wide range of applications, and can adapt to various scenarios; (6) In the embodiments of the present invention, the double ball head rolling mechanism is equipped with a pressure sensor to adjust the rolling pressure in real time, and the strengthening effect is stable and reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a side view of the entire invention; Figure 4 This is a schematic diagram of the double ball head rolling mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the first clamping mechanism and the second clamping mechanism of the present invention; Figure 6 This is a schematic diagram of the Z-type electromagnetic adsorption mechanism; Figure 7 This is a schematic diagram of the structure of the universal wheel of the present invention; Figure 8 This is a schematic diagram of the grinding mechanism of the present invention; In the diagram: 1-Outer frame; 2-Grinding mechanism; 21-Grinding motor; 22-Adjusting slide; 23-Grinding wheel; 24-Pressure sensor; 3-Double ball head rolling mechanism; 31-Motor; 32-Telescopic cylinder; 33-Carbide ball head; 34-Pressure sensor; 4-Telescopic rod; 5-Universal wheel; 6-First clamping mechanism; 61-First cylinder; 62-Upper pressure plate; 7-Second clamping mechanism; 71-Second cylinder; 72-First top plate; 73-Third cylinder; 74-Second top plate; 8-Z-type electromagnetic adsorption mechanism; 81-Magnetic upper plate; 82-Magnetic lower plate; 83-Electromagnetic chuck; 84-Upper slide groove; 85-Lower slide groove; 86-First connecting rod; 87-Second connecting rod; 9-Control console; 10-Pipeline; 11-Drive motor. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] See Figure 1-3 An automated in-service pipe polishing and rolling strengthening device includes an outer frame 1, a grinding mechanism 2 fixed above the front end of the outer frame 1, a double ball head rolling mechanism 3 fixed on the left and right sides of the front end of the outer frame 1, a number of telescopic rods 4 fixed inside the outer frame 1, universal wheels 5 fixedly connected to the telescopic rods 4, and a first clamping mechanism 6 and a second clamping mechanism 7 disposed inside the outer frame 1.

[0020] The telescopic rod 4 can be a conventional component with telescopic properties, such as a cylinder or an electric cylinder.

[0021] See Figure 1-3 In one embodiment of the present invention, the outer frame 1 is annular and can be fitted onto the outside of the pipe 10 to provide an installation carrier for each functional mechanism.

[0022] See Figure 1 In one embodiment of the present invention, a control console 9 is fixed on the outer frame 1. The control console 9 can adjust the rotation speed of the grinder, the working path of the machine and the moving speed of the casters, and can also control the length of each telescopic rod to achieve the state required by each working part.

[0023] See Figure 2 and Figure 8 In one embodiment of the present invention, the grinding mechanism 2 includes a grinding motor 21 fixedly connected to the upper front end of the outer frame 1, an adjusting slide 22 fixedly connected to the rotating shaft of the grinding motor 21, and a grinding wheel 23 slidably connected to the adjusting slide 22. The adjusting slide 22 can drive the grinding wheel 23 to move radially to adapt to different pipe diameters and adjust the grinding pressure.

[0024] See Figure 4 In one embodiment of the present invention, the double ball head rolling mechanism 3 includes a motor 31 fixedly connected to the outer frame 1, a telescopic cylinder 32 fixedly connected to the rotating shaft of the motor 31, and a hard alloy ball head 33 fixedly connected to the telescopic end of the telescopic cylinder 32. The telescopic cylinder 32 drives the hard alloy ball head 33 to roll and strengthen the surface of the pipe 10.

[0025] See Figure 4 Based on the previous embodiment, a pressure sensor 34 is also fixed on the telescopic end of the telescopic cylinder 32 to monitor the rolling pressure in real time and ensure that the rolling strengthening effect is uniform and stable.

[0026] See Figure 7In one embodiment of the present invention, the caster wheel 5 is a Mecanum wheel, and the telescopic rod 4 can adjust the radial position of the caster wheel 5 to adapt to pipes 10 of different diameters. At the same time, the caster wheel 5 can realize the omnidirectional movement of the device around the pipe 10. The caster wheel 5 is driven to rotate by the drive motor 11.

[0027] See Figure 5 In one embodiment of the present invention, the first clamping mechanism 6 includes a first cylinder 61 fixed to the inner wall of the outer frame 1 and an upper pressure plate 62 fixedly connected to the telescopic end of the first cylinder 61. The upper pressure plate 62 is inverted U-shaped, and the first cylinder 61 drives the upper pressure plate 62 to clamp and position the upper part of the pipe 10.

[0028] See Figure 5 In one embodiment of the present invention, the second clamping mechanism 7 includes a second cylinder 71 fixed to the lower left side of the inner wall of the outer frame 1, a first top plate 72 fixedly connected to the telescopic end of the second cylinder 71, a third cylinder 73 fixed to the lower right side of the inner wall of the outer frame 1, and a second top plate 74 fixedly connected to the telescopic end of the third cylinder 73. The first top plate 72 and the second top plate 74 cooperate to support and clamp the lower part of the pipe 10, and work together with the first clamping mechanism 6 to achieve automatic centering of the pipe 10.

[0029] See Figure 2 and Figure 6 In one embodiment of the present invention, a Z-shaped electromagnetic adsorption mechanism 8 is further provided between the upper pressure plate 62 and the workpiece. The Z-shaped electromagnetic adsorption mechanism 8 includes a magnetic upper plate 81 and a magnetic lower plate 82. An electromagnetic chuck 83 is provided in the magnetic upper plate 81 and the magnetic lower plate 82. The magnetic upper plate 81 has an upper sliding groove 84 and the magnetic lower plate 82 has a lower sliding groove 85. One end of a first connecting rod 86 is slidably connected in the upper sliding groove 84, and the other end of the first connecting rod 86 is hinged to the magnetic lower plate 82. One end of a second connecting rod 87 is slidably connected in the lower sliding groove 85, and the other end of the second connecting rod 87 is hinged to the magnetic upper plate 81. The second connecting rod 87 is hinged to the middle of the first connecting rod 86. When the electromagnetic chuck 83 is energized, it achieves a firm adsorption between the device and the pipe 10. When the power is turned off, the adsorption is quickly released.

[0030] The Z-type electromagnetic adsorption mechanism is a light adsorption mechanism. This mechanism does not completely fix the machine to the pipeline. Its main function is to apply a small pressure, which can both lightly fix the machine during operation and determine the corresponding length of various telescopic rods when the adsorption mechanism is fixed to the pipeline, thus playing a positioning role and enabling each workpiece to work efficiently.

[0031] A method for using an automated in-service pipe polishing and rolling strengthening device is as follows: Move the entire device to the side of the in-service pipeline 10 to be processed, and align it with the section of pipeline 10 to be processed; The annular outer frame 1 is fitted over the outside of the pipe 10 to be processed, so that the pipe 10 is located in the central area of ​​the outer frame 1; The first clamping mechanism 6 and the second clamping mechanism 7 work together to complete the automatic centering and clamping of the pipe 10: that is, the first cylinder 61 is activated to drive the inverted U-shaped upper pressure plate 62 to move downward and initially press the upper part of the pipe 10; simultaneously, the second cylinder 71 and the third cylinder 73 are activated to drive the first top plate 72 and the second top plate 74 to move towards the center of the pipe 10, and cooperate with the upper pressure plate 62 to complete the automatic centering and lower support of the pipe 10.

[0032] Adjust the Z-shaped electromagnetic adsorption mechanism 8 to fit against the outer wall of the pipe 10, and energize the electromagnetic chuck 83 to achieve adsorption between the device and the pipe 10: that is, adjust the magnetic upper plate 81 and magnetic lower plate 82 of the Z-shaped electromagnetic adsorption mechanism 8, and slide them in the groove through the first connecting rod 86 and the second connecting rod 87 to adaptively fit against the outer wall of the pipe 10; energize the electromagnetic chuck 83 to generate suction force to adsorb and position the device and the pipe 10.

[0033] Adjust the universal wheel 5 to the appropriate pipe diameter position by adjusting the telescopic rod 4, adjust the grinding wheel 23 by adjusting the slide table 22, and adjust the carbide ball head 33 to the working position by adjusting the telescopic cylinder 32. Adjust the telescopic rod 4 inside the outer frame 1 to push the universal wheel 5 to move radially so that the wheel surface is in close contact with the outer wall of the pipe 10 to match the current pipe 10 diameter.

[0034] Start the grinding motor 21, and the grinding wheel 23 performs polishing pretreatment on the surface of the pipe 10; start the double ball head rolling mechanism 3, and the carbide ball head 33 performs rolling strengthening on the polished surface of the pipe 10; adjust the radial position of the grinding wheel 23 by adjusting the slide table 22, and set the grinding feed and grinding pressure so that the grinding wheel 23 fits against the surface of the pipe 10 to be processed; start the grinding motor 21 to drive the grinding wheel 23 to rotate, and remove oxide scale, rust, welding slag and polish the surface of the pipe 10.

[0035] Start the motor 31 of the double ball head rolling mechanism 3, adjust the extension length of the telescopic cylinder 32, so that the carbide ball head 33 contacts the polished surface of the pipe 10; turn on the pressure sensor 34 to monitor the rolling pressure in real time. The telescopic cylinder 32 maintains the set pressure, and the double ball heads simultaneously roll the surface of the pipe 10, introducing residual compressive stress, refining the grains, and completing surface strengthening.

[0036] The universal wheel 5 drive device moves omnidirectionally along the axial and circumferential directions of the pipe 10 to achieve continuous processing: driving the universal wheel 5 drives the device to move omnidirectionally along the axial and circumferential directions of the pipe 10 to achieve continuous polishing and rolling of the outer wall of the pipe 10 without dead angles.

[0037] After processing, the electromagnetic chuck 83 is de-energized and released from adsorption, the first clamping mechanism 6 and the second clamping mechanism 7 are reset, and the removal device is removed. After all polishing and rolling processes are completed, the grinding motor 21, the motor 31 of the double ball head rolling mechanism 3, and the pressure sensor 34 are turned off in sequence. When the electromagnetic chuck 83 is de-energized, the magnetic attraction disappears, and the Z-shaped electromagnetic adsorption mechanism 8 separates from the outer wall of the pipe 10. The first cylinder 61 drives the upper pressure plate 62 to rise, and the second cylinder 71 and the third cylinder 73 drive the first top plate 72 and the second top plate 74 to retract respectively, releasing the clamping and support of the pipe 10.

[0038] Adjust the telescopic rod 4 to retract the caster 5, remove the annular outer frame 1 from the pipe 10, remove the device, and complete the entire processing procedure.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automated in-service pipe polishing and rolling strengthening device, characterized in that, It includes an outer frame, a grinding mechanism fixed above the front end of the outer frame, a double ball-head rolling mechanism fixed on the left and right sides of the front end of the outer frame, several telescopic rods fixed inside the outer frame, universal wheels fixedly connected to the telescopic rods, and a first clamping mechanism and a second clamping mechanism set inside the outer frame.

2. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The outer frame is ring-shaped.

3. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The polishing mechanism includes a polishing motor fixedly connected to the upper front end of the outer frame, an adjusting slide fixedly connected to the rotating shaft of the polishing motor, and a polishing wheel slidably connected to the adjusting slide.

4. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The double ball head rolling mechanism includes a motor fixedly connected to the outer frame, a telescopic cylinder fixedly connected to the motor's rotating shaft, and a hard alloy ball head fixedly connected to the telescopic end of the telescopic cylinder.

5. The automated in-service pipeline polishing and rolling strengthening device according to claim 4, characterized in that, A pressure sensor is also fixed on the telescopic end of the cylinder.

6. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The caster wheel is a Mechner wheel, which is driven to rotate by a drive motor.

7. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The first clamping mechanism includes a first cylinder fixed to the inner wall of the outer frame and an upper pressure plate fixedly connected to the telescopic end of the first cylinder. The upper pressure plate is in the shape of an inverted U.

8. The automated in-service pipeline polishing and rolling strengthening device according to claim 1, characterized in that, The second clamping mechanism includes a second cylinder fixed to the lower left side of the inner wall of the outer frame, a first top plate fixedly connected to the telescopic end of the second cylinder, a third cylinder fixed to the lower right side of the inner wall of the outer frame, and a second top plate fixedly connected to the telescopic end of the third cylinder. The first top plate and the second top plate cooperate to support the workpiece.

9. An automated in-service pipe polishing and rolling strengthening device according to claim 7, characterized in that, A Z-shaped electromagnetic adsorption mechanism is also provided between the upper pressure plate and the workpiece. The Z-shaped electromagnetic adsorption mechanism includes a magnetic upper plate and a magnetic lower plate. Electromagnetic chucks are provided in the magnetic upper plate and the magnetic lower plate. The magnetic upper plate has an upper sliding groove and the magnetic lower plate has a lower sliding groove. One end of a first connecting rod is slidably connected in the upper sliding groove. The other end of the first connecting rod is hinged to the magnetic lower plate. One end of a second connecting rod is slidably connected in the lower sliding groove. The other end of the second connecting rod is hinged to the magnetic upper plate. The second connecting rod is hinged to the middle of the first connecting rod.

10. A method of using the automated in-service pipe polishing and rolling strengthening device as described in any one of claims 1-9, characterized in that, The method is as follows: The annular outer frame is fitted onto the outside of the pipe to be processed; the first and second clamping mechanisms work together to automatically center and clamp the pipe; the Z-shaped electromagnetic adsorption mechanism is adjusted to fit the outer wall of the pipe, and the electromagnetic chuck is energized to achieve adsorption between the device and the pipe; the universal wheels are adjusted to the appropriate pipe diameter position using the telescopic rod, the grinding wheel is adjusted using the sliding table, and the carbide ball head is adjusted to the working position using the telescopic cylinder; the grinding motor is started, and the grinding wheel performs polishing pretreatment on the pipe surface; The double ball head rolling mechanism is activated, and the carbide ball head rolls and strengthens the polished pipe surface; the Mecanum wheel drive moves omnidirectionally along the pipe axis and circumference to achieve continuous processing; after processing, the electromagnetic chuck is de-energized and released from adsorption, the first clamping mechanism and the second clamping mechanism are reset, and the device is removed.

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