Surface treatment equipment and treatment method for oil pipe machining

Abstract

The invention relates to the technical field of petroleum pipeline machining, and particularly discloses surface treatment equipment for oil pipe machining and a treatment method.The surface treatment equipment comprises a mounting mechanism, a supporting mechanism and two grinding mechanisms, the supporting mechanism is annular, a through hole for a pipeline to penetrate through is formed in the supporting mechanism, and the through hole is provided with a main axis extending front and back; the two polishing mechanisms are distributed on the upper side and the lower side of the main axis. Each polishing mechanism comprises a transmission assembly and an abrasive belt mechanism installed in the transmission assembly. According to the surface treatment equipment for oil pipe machining and the treatment method, the supporting mechanism is arranged on the outer side of the pipeline in a sleeving mode, meanwhile, the upper rotating ring and the lower rotating ring are connected, and the rotating rings drive abrasive cloth to rotate around the outer side of the pipeline through the jacking assembly and the two adjusting assemblies so as to polish welding seams on the pipeline; when the abrasive cloth meets a protruding weld joint in the weld joint polishing process, the polishing force of the abrasive cloth on the weld joint can be increased through the jacking roller, and therefore large polishing force can be accurately applied to the protruding position of the weld joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil pipeline processing, in particular to a surface treatment equipment and method for oil pipe processing. BACKGROUND

[0002] Oil pipe is a key equipment in the oil and gas industry for downhole oil and gas exploitation, mainly used for transporting crude oil or natural gas from the formation to the ground surface, and needs to withstand high pressure environment and meet international standards such as API SPEC 5CT. Its application fields cover oil and gas exploitation, engineering machinery hydraulic system, coal industry water injection and grouting, and oil drilling equipment. Oil pipe is divided into seamless pipe and welded pipe, seamless pipe is mainly used for ultra-deep well, ultra-high pressure well, and corrosive environment containing acid gas, and welded pipe is mainly used as a gathering pipeline network in the oil field. During the processing of the welded pipe, a polishing device is usually used to process the weld joint of the oil pipe.

[0003] The patent document with the authorization announcement number CN222711698U discloses a pipeline welding polishing device, which comprises a base; two sides of the base are fixedly connected with wheel frames; the top of each wheel frame is provided with a wheel seat; a supporting shaft is rotatably connected to the wheel seat; a pair of supporting rollers are fixedly connected to the supporting shaft; a stand is fixedly connected to the side surface of the wheel frame; a driving seat is arranged on the top of the stand; a speed reducer motor is fixedly connected to the driving seat; and a driving shaft is rotatably connected to the side surface of the driving seat.

[0004] However, the structure design of the above-mentioned related technology: in the process of polishing the weld of the pipeline, due to the uneven surface of the weld, part of the weld is more protruding, and in the process of polishing the weld by the polishing piece driven by the electric push rod motor, it is inconvenient to accurately apply polishing force to the protruding position of the weld, which may cause inconsistent excess during polishing, so that the protruding position of the weld is still protruding, and the other parts are prone to over-polishing.

[0005] Therefore, a surface treatment equipment and method for oil pipe processing are proposed to solve the problems in the above-mentioned related technology. SUMMARY

[0006] The present application provides a surface treatment equipment and method for oil pipe processing, which aims to solve the problem of inconvenient accurate application of polishing force to the protruding position of the weld in the related technology.

[0007] The surface treatment equipment for oil pipe processing of the present application comprises a mounting mechanism, a supporting mechanism and two polishing mechanisms, the supporting mechanism is annular and has a through hole for the pipeline to pass through inside, the through hole has a main axis extending along the front and back, and the two polishing mechanisms are distributed on the upper and lower sides of the main axis, the polishing mechanism comprises a transmission assembly and a sand belt mechanism installed in the transmission assembly;

[0008] The transmission assembly includes a rotating ring and a drive assembly. The rotating ring is mounted in the support mechanism and rotates around the main axis. The drive assembly is used to drive the rotating ring to rotate, and the transmission assembly is used to drive the sanding belt mechanism to rotate around the central axis. The sanding belt mechanism includes a top pressure assembly, two adjustment assemblies, an annular abrasive cloth, and a motor. The adjustment assembly includes rotating rollers and elastic connectors. The two rotating rollers are radially and elastically slidably connected to the rotating ring along the main axis through the elastic connectors and are distributed left and right. The top pressure assembly includes a top pressure roller located between the two rotating rollers and an elastic support. The two ends of the abrasive cloth are fitted onto the rotating rollers, and the middle part of the abrasive cloth is fitted onto the top pressure roller. The top pressure roller is radially and elastically slidably connected to the rotating ring along the main axis through the elastic support to increase the grinding force of the abrasive cloth on the protruding parts of the pipe weld.

[0009] Before grinding the pipe, the support mechanism is placed on the outside of the pipe, and the upper and lower rotating rings are connected to form a closed ring structure so that the abrasive cloth covers the outside of the pipe, ensuring that the entire weld area can be effectively ground. Then, the grinding of the weld on the pipe begins. During grinding, the rotating ring is driven by the drive component to rotate. The rotating ring drives the abrasive cloth to rotate around the outside of the pipe through the top pressure component and two adjustment components to grind the weld on the pipe. When the abrasive cloth encounters a relatively protruding weld during the grinding process, the top pressure roller will apply additional top pressure, which can increase the grinding force of the abrasive cloth on the protruding part of the weld, so as to accurately apply a larger grinding force to the protruding part of the weld and avoid excessive grinding of the weld in other areas of the pipe.

[0010] Preferably, the support mechanism includes a lower support component, an upper support component, and a locking component, wherein the upper support component is disposed on the lower support component, and the locking component is disposed inside the upper support component.

[0011] Preferably, the lower support assembly includes a lower housing, connecting blocks, a protective cover, and sliders. The lower housing is slidably mounted on the mounting mechanism. The two connecting blocks are respectively mounted on the top sides of the lower housing. The protective cover is mounted on the bottom of the lower housing and is connected to the interior of the lower housing. The two sliders are respectively mounted on the bottom sides of the lower housing. The drive assembly is located on one side of the protective cover.

[0012] Preferably, the upper support assembly includes an upper shell and two connecting blocks II. The two connecting blocks II are respectively installed on the bottom sides of the upper shell. The connecting blocks I and II are fixed together by bolts. Rotating grooves for sliding of the transmission assembly are provided on both sides of the inner wall of the upper shell and the lower shell.

[0013] Preferably, the locking assembly includes a gear, a rotating shaft, and a locking seat. The gear is located on the top side of the upper rotating ring and meshes with the rotating ring. The rotating shaft is installed at one end of the gear and extends through one side of the upper housing to the outside of the upper housing. The locking seat is located on the outside of one end of the rotating shaft.

[0014] The locking seat can lock the rotating shaft, preventing gear 1 from rotating. At the same time, gear 1 can lock the upper rotating ring, thus locking the rotating ring when not in use and preventing the upper rotating ring from rotating.

[0015] Preferably, the drive assembly includes a motor, a second gear, and a second helical gear. The motor is mounted on one end of the protective cover, the second gear is mounted on the motor, the second gear is located at the bottom of the lower rotating ring and meshes with the rotating ring, and the second helical gear is mounted on one end of the second gear and located below the lower rotating ring.

[0016] The motor drives the rotating ring to rotate via gear two, thereby causing the abrasive cloth to rotate around the outside of the pipe.

[0017] Preferably, the adjustment assembly further includes a hinge cylinder, a sliding shaft, and a rotating frame. The hinge cylinder is hinged to the inner side of the rotating ring, the sliding shaft is radially elastically slidably connected to the inside of the hinge cylinder along the main axis, the rotating frame is mounted on the top of the sliding shaft, and the rotating roller is rotatably connected to the inside of the rotating frame with the rotating roller protruding from the top of the rotating frame.

[0018] The hinged cylinder, hinged to the rotating ring, can adaptively adhere to the outside of the pipe when the rotating roller contacts the outside of the pipe, so as to adapt to pipes of different diameters and facilitate grinding of pipes of different diameters.

[0019] Preferably, the mounting mechanism includes a mounting component and a sliding component, the lower housing is slidably connected to the mounting component, and the sliding component is disposed inside the mounting component.

[0020] Preferably, the mounting assembly includes a mounting frame, two slides, and two baffles. The two slides are respectively opened on the top sides of the mounting frame, the slider on the lower housing is slidably connected in the slides, and the two baffles are respectively installed on the front and rear sides of the mounting frame.

[0021] The slider on the lower housing can slide on the mounting bracket by means of the groove opened on the mounting bracket.

[0022] A surface treatment method for oil pipe processing, using the aforementioned surface treatment equipment for oil pipe processing, includes the following steps: S1: The hydraulic cylinder drives the lower housing to rise, so that the inner side of the sandpaper below is close to the outer surface of the pipe. At the same time, the two rotating rollers are spread open and pressed against the outer wall of the pipe by the action of the pipe. Then the sliding shaft is locked by the fixing parts. S2: Install the upper housing onto the top of the lower housing so that the two sandpaper sheets fit together tightly against the outer wall of the pipe; S3: Turn the locking seat handle to release the rotating shaft lock, allowing the rotating ring to rotate freely. Then, the motor drives the lower rotating ring to rotate through gear two, which in turn drives the upper rotating ring to rotate synchronously, so that the sandpaper rotates around the outer wall of the pipe. S4: When the abrasive cloth passes through the weld with a high protrusion, the top pressure roller is compressed by the reverse force, increasing the grinding pressure of the abrasive cloth on this part. When the weld protrusion is ground to be flush with the pipe, the top pressure roller returns to normal pressure. S5: The motor drives the sandpaper to rotate in the opposite direction to the rotation of the ring via the rotating roller, so as to enhance the sanding effect.

[0023] During grinding, the lower and upper housings are joined together, with the pipe placed between them. At this time, the two rotating rollers are spread apart and pressed against the outer wall of the pipe by the action of the pipe, so that the two abrasive cloths are pressed against the outer wall of the pipe together. When the abrasive cloths come into contact with the outer wall of the pipe, the motor drives the lower rotating ring and the upper rotating ring to rotate synchronously through the gear two, thereby driving the abrasive cloths to rotate around the outer wall of the pipe and grind the weld. When the abrasive cloths encounter relatively protruding welds during the grinding process, the top pressure roller can increase the grinding force of the abrasive cloths on the welds, so as to apply a larger grinding force to the protruding parts of the welds precisely, avoiding excessive grinding of the welds in other areas of the pipe. When the weld protrusions are ground to be flush with the pipe, the top pressure rollers return to normal pressure to prevent over-grinding.

[0024] The beneficial effects of the present invention by adopting the above technical solution are as follows: During grinding, the support mechanism is sleeved on the outside of the pipe, and the upper and lower rotating rings are connected so that the abrasive cloth covers the outside of the pipe. Then, the rotating ring drives the abrasive cloth to rotate around the outside of the pipe through the top pressure component and two adjusting components to grind the weld on the pipe. When the abrasive cloth encounters a relatively protruding weld during the grinding process, the top pressure roller can increase the grinding force of the abrasive cloth on the weld, so as to accurately apply a larger grinding force to the protruding part of the weld and avoid excessive grinding of the weld in other areas of the pipe. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the support mechanism in a specific embodiment of the present invention.

[0027] Figure 3This is a schematic diagram of the internal structure of the lower and upper shells in a specific embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the transmission assembly in a specific embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the fixed cylinder and the hinged cylinder in a specific embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the locking component in a specific embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the installation mechanism in a specific embodiment of the present invention.

[0032] Figure label: 10. Lifting mechanism; 11. Base plate; 12. Casters; 13. Hydraulic cylinder; 14. Telescopic rod; 20. Mounting mechanism; 21. Mounting assembly; 211. Mounting bracket; 212. Slide groove; 213. Baffle; 22. Sliding assembly; 221. Reciprocating lead screw; 222. Threaded sleeve; 223. Helical gear one; 30. Support mechanism; 31. Lower support assembly; 311. Lower housing; 312. Connecting block one; 313. Protective cover; 314. Slider; 32. Upper support assembly; 321. Upper housing; 322. Connecting block two; 323. Rotating groove; 33. Locking assembly; 331. Gear one; 332. Rotating shaft; 333. Locking seat; 40. Grinding mechanism; 41. Transmission assembly; 411. Rotary ring; 412. Semi-slip ring; 413. Insert block; 414. Slot; 42. Drive assembly; 421. Motor; 422. Gear II; 423. Helical gear II; 43. Top pressure assembly; 431. Fixed cylinder; 432. Spring I; 433. Limiting plate; 434. Slide rod; 435. Connecting frame; 436. Top pressure roller; 44. Adjustment assembly; 441. Hinge seat; 442. Hinge cylinder; 443. Fixing component; 444. Spring II; 445. Slide plate; 446. Slide shaft; 447. Rotating frame; 448. Rotating roller; 45. Motor I; 46. Sandpaper. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] like Figures 1 to 7As shown, the surface treatment equipment for oil pipe processing of the present invention includes a lifting mechanism 10, a mounting mechanism 20, a support mechanism 30, and two grinding mechanisms 40. The mounting mechanism 20 is mounted on the top of the lifting mechanism 10, the support mechanism 30 is slidably connected to the top of the mounting mechanism 20, and the two grinding mechanisms 40 are both disposed inside the support mechanism 30. The support mechanism 30 is annular and has a through hole for the pipe to pass through. The through hole has a main axis extending along the front and rear. The two grinding mechanisms 40 are distributed on the upper and lower sides of the main axis.

[0035] During grinding, the lifting mechanism 10 drives the support mechanism 30 to be fitted onto the outside of the pipe, and then the grinding mechanism 40 grinds the weld seam on the pipe.

[0036] like Figures 1 to 3 As shown, the support mechanism 30 includes a lower support component 31, an upper support component 32, and a locking component 33. The upper support component 32 is disposed on top of the lower support component 31, and the locking component 33 is disposed inside the upper support component 32.

[0037] Continue to refer to Figures 1 to 3 As shown, the lower support assembly 31 includes a lower housing 311, connecting blocks 312, a protective cover 313, and sliders 314. The lower housing 311 is slidably mounted on the mounting mechanism 20, and an arc-shaped groove is formed on the top of the lower housing 311. There are two connecting blocks 312, which are respectively installed on the top sides of the lower housing 311. The protective cover 313 is installed on the bottom of the lower housing 311 and is connected to the interior of the lower housing 311. There are two sliders 314, which are respectively installed on the bottom sides of the lower housing 311.

[0038] like Figures 2 to 3 As shown, the upper support assembly 32 includes an upper housing 321 and a second connecting block 322. Both the lower housing 311 and the upper housing 321 have cavities for the grinding mechanism 40 to rotate. An arc-shaped groove is formed at the bottom of the upper housing 321, and the arc-shaped groove on the lower housing 311 communicates with the arc-shaped groove on the upper housing 321. There are two connecting blocks 322, which are respectively installed on the bottom sides of the upper housing 321. Connecting block 312 and connecting block 322 are fixed together by bolts. Rotation grooves 323 for the grinding mechanism 40 to slide are formed on both sides of the inner walls of the upper housing 321 and the lower housing 311.

[0039] Before polishing, place the upper housing 321 on top of the lower housing 311, and then connect the connecting block 1 312 and the connecting block 2 322 with bolts to fix the upper housing 321 and the lower housing 311.

[0040] like Figure 1 , Figure 3 ,Figure 4 and Figure 6 As shown, the locking assembly 33 includes a gear 331, a rotating shaft 332, and a locking seat 333. The gear 331 is located on one side of the top of the grinding mechanism 40 and meshes with the grinding mechanism 40. The rotating shaft 332 is installed at one end of the gear 331. One end of the rotating shaft 332 passes through one side of the upper housing 321 and extends to the outside of the upper housing 321. The locking seat 333 is sleeved on the outside of one end of the rotating shaft 332. The locking seat 333 is installed on the top side of the upper housing 321. The locking seat 333 is provided with a handle for controlling locking and unlocking. The locking seat 333 is specifically a handle locker. The handle locker is prior art, and its structure and working principle will not be described in detail here.

[0041] When not in use, rotating the handle on the locking seat 333 can lock the rotating shaft 332, thus preventing the rotating shaft 332 from rotating. The rotating shaft 332 can lock the grinding mechanism 40 through gear 331 to prevent the grinding mechanism 40 from rotating. When in use, rotating the handle on the locking seat 333 in the opposite direction can release the lock on the rotating shaft 332, thus allowing the rotating shaft 332 to rotate.

[0042] like Figures 1 to 3 As shown, both grinding mechanisms 40 include a transmission assembly 41 and a sanding belt mechanism installed in the transmission assembly 41. The transmission assembly 41 includes a transmission component 41 and a drive component 42. The transmission component 41 is rotatably mounted inside the support mechanism 30 around the main axis. The drive component 42 is mounted on the protective cover 313 to drive the transmission component 41 to rotate. The transmission component 41 is used to drive the sanding belt mechanism to rotate around the central axis.

[0043] like Figures 2 to 4 As shown, the transmission assembly 41 includes a rotating ring 411 and two semi-slip rings 412. The rotating ring 411 is composed of a semi-toothed ring, and the two semi-slip rings 412 are respectively mounted on the two end faces of the rotating ring 411. The semi-slip rings 412 on the upper and lower rotating rings 411 are rotatably connected in the rotation grooves 323 of the lower housing 311 and the upper housing 321, respectively. Insert blocks 413 are installed on both sides of the bottom of the upper rotating ring 411, and slots 414 for inserting the insert blocks 413 are opened on both sides of the top of the lower rotating ring 411. Gear 331 meshes with the upper rotating ring 411, preventing the upper rotating ring 411 from rotating when not in use.

[0044] like Figures 3 to 4As shown, the drive assembly 42 includes a motor 421, a second gear 422, and a second helical gear 423. The motor 421 is mounted at one end of the protective cover 313, and one end of the second gear 422 is mounted on the drive shaft of the motor 421. The second gear 422 is located at the bottom of the lower rotating ring 411 and meshes with it. The meshing of the lower rotating ring 411 with the second gear 422 provides support and limits the rotation of the lower rotating ring 411, preventing it from rotating when the motor 421 is not running. The second helical gear 423 is mounted at one end of the second gear 422 and is located below the lower rotating ring 411.

[0045] When the upper housing 321 is fixed to the top of the lower housing 311, the insert 413 on the upper rotating ring 411 is inserted into the slot 414 on the lower rotating ring 411. When the motor 421 drives the lower rotating ring 411 to rotate via the gear 422, the lower rotating ring 411 can drive the upper rotating ring 411 to rotate via the insert 413.

[0046] like Figures 2 to 5 As shown, the sanding belt mechanism includes a top pressure component 43, two adjustment components 44, an annular sanding cloth 46, and a motor 45. The two adjustment components 44 are both set on the rotating ring 411 and are distributed left and right. The top pressure component 43 is located between the two adjustment components 44. The left and right ends of the sanding cloth 46 are respectively fitted onto the two adjustment components 44, and the middle part of the sanding cloth 46 is fitted onto the top pressure component 43.

[0047] like Figures 3 to 5 As shown, the top-pressing assembly 43 includes a fixed cylinder 431, a spring 432, a limiting plate 433, a sliding rod 434, a connecting frame 435, and a top-pressing roller 436. The bottom end of the fixed cylinder 431 is installed in the middle of the inner side of the rotating ring 411. The bottom end of the spring 432 is installed in the middle of the inner bottom wall of the fixed cylinder 431. The bottom end of the limiting plate 433 is installed in the top of the spring 432. The bottom end of the sliding rod 434 is installed in the top of the limiting plate 433, and the top of the sliding rod 434 passes through the top of the fixed cylinder 431 and extends to the outside of the fixed cylinder 431. The connecting frame 435 is installed in the top of the sliding rod 434. The connecting frame 435 is U-shaped. The top-pressing roller 436 is rotatably connected to the outside of the connecting frame 435, and the outer side of the top-pressing roller 436 protrudes from the top of the connecting frame 435.

[0048] Continue to refer to Figures 3 to 5As shown, the adjusting assembly 44 includes a hinge seat 441, a hinge cylinder 442, a fixing member 443, a second spring 444, a sliding plate 445, a sliding shaft 446, a rotating frame 447, and a rotating roller 448. The hinge seat 441 is installed inside the rotating ring 411 and is hinged to the bottom end of the hinge cylinder 442 via a pin. A torque spring (not shown) is provided between the hinge seat 441 and the pin to drive the hinge cylinder 442 to return to its original position. The bottom end of the second spring 444 is installed in the middle of the inner bottom wall of the hinge cylinder 442, and the bottom end of the sliding plate 445 is installed at the top end of the second spring 444.

[0049] The bottom end of the sliding shaft 446 is mounted on the top end of the sliding plate 445, and the top end of the sliding shaft 446 passes through the top end of the hinge cylinder 442 and extends to the outside of the hinge cylinder 442. The fixing member 443 is a screw, which is threadedly connected to the top of one side of the hinge cylinder 442, and can fix the sliding shaft 446 through the fixing member 443. The rotating frame 447 is mounted on the top end of the sliding shaft 446. The rotating frame 447 is U-shaped. The rotating roller 448 is rotatably connected to the inside of the rotating frame 447. The outer side of the rotating roller 448 protrudes from the top of the rotating frame 447. The motor 45 is mounted on the rotating frame 447, and the drive shaft of the motor 45 is mounted on one end of the rotating roller 448. The two ends of the abrasive cloth 46 are respectively fitted onto the two rotating rollers 448, and the middle part of the abrasive cloth 46 is fitted onto the top pressure roller 436.

[0050] The torque spring on the hinge seat 441 allows the rotating roller 448 to adhere to the outside of the pipe during the upward movement of the lower housing 311, thus enabling the abrasive cloth 46 to adapt to pipes of different diameters and facilitating grinding of pipes of varying diameters. The spring 432 on the fixed cylinder 431 tensions the abrasive cloth 46, and the motor 45 drives the abrasive cloth 46 to rotate via the rotating roller 448, thereby changing the grinding surface of the abrasive cloth 46. When the motor 421 starts, it drives the upper and lower rotating rings 411 to rotate via the gear 422.

[0051] When the rotating ring 411 rotates, it drives the rotating frame 447 on the sliding shaft 446 to rotate around the main axis via the hinge cylinder 442 on the hinge seat 441. Simultaneously, the rotating frame 447 drives the abrasive cloth 46 to rotate via the rotating roller 448, causing the abrasive cloth 46 to rotate on the outside of the pipe, thereby grinding the weld seam on the pipe. During the weld seam grinding process, the spring 432 in the fixed cylinder 431 drives the connecting frame 435 to press against the pipe via the sliding rod 434 on the limiting plate 433, thus causing the pressure roller 436 to press against the pipe. When the weld seam protrudes significantly, the pressure of the pressure roller 436 can apply greater force to the abrasive cloth 46, thereby precisely grinding the more protruding parts of the weld seam, allowing the abrasive cloth 46 to obtain greater grinding force when passing over the more protruding weld seam. When the weld seam is ground to be flush with the outer surface of the pipe, the pressure roller 436 can stop on the outer surface of the pipe to prevent the abrasive cloth 46 from over-grinding the pipe.

[0052] like Figures 1 to 3 As shown, the mounting mechanism 20 includes a mounting assembly 21 and a sliding assembly 22. The lower housing 311 is slidably connected to the top of the mounting assembly 21, the mounting assembly 21 is mounted on the top of the lifting mechanism 10, and the sliding assembly 22 is disposed inside the mounting assembly 21.

[0053] When the lifting mechanism 10 is activated, it drives the mounting component 21 to move up and down, thereby moving the lower housing 311 up and down, enabling it to perform precise vertical lifting movements. This lifting movement can be flexibly adjusted according to the pipe diameter and weld height, ensuring that the abrasive cloth 46 always maintains the optimal contact position with the pipe surface, thus achieving an efficient grinding effect. The sliding component 22 drives the lower housing 311 to reciprocate along the length of the pipe for reciprocating grinding.

[0054] like Figures 2 to 3 and Figure 7 As shown, the mounting assembly 21 includes a mounting bracket 211, a sliding groove 212, and a baffle 213. The mounting bracket 211 is U-shaped, and there are two sliding grooves 212, which are respectively formed on the top two sides of the mounting bracket 211. The slider 314 on the lower housing 311 is slidably connected in the sliding groove 212. There are two baffles 213, which are respectively installed on the front and rear sides of the mounting bracket 211. The sliding assembly 22 is rotatably connected between the two baffles 213.

[0055] like Figures 2 to 4 and Figure 7As shown, the sliding assembly 22 includes a reciprocating screw 221, a threaded sleeve 222, and a helical gear 223. The reciprocating screw 221 is rotatably connected between two baffles 213, the threaded sleeve 222 is threadedly connected to the reciprocating screw 221, and the helical gear 223 is installed on the outside of the threaded sleeve 222. The upper half of the helical gear 223 is located inside the protective cover 313 and meshes with the helical gear 423.

[0056] When gear 2 422 starts to rotate, it drives helical gear 1 223 to rotate via helical gear 2 423. The rotation of helical gear 1 223 further drives the threaded sleeve 222 to reciprocate laterally on the reciprocating screw 221. At the same time, the threaded sleeve 222 is connected to the lower housing 311 via helical gear 1 223. The rotation of helical gear 1 223 not only drives the threaded sleeve 222 to reciprocate on the reciprocating screw 221, but also drives the lower housing 311 to reciprocate laterally on the mounting bracket 211, so that the abrasive cloth 46 reciprocates laterally on the surface of the pipe, thereby uniformly polishing the surface of the pipe.

[0057] like Figures 1 to 2 and Figure 7 As shown, the lifting mechanism 10 includes a base plate 11, casters 12, hydraulic cylinders 13, and telescopic rods 14. The casters 12 are equipped with brake pads, and there are four casters 12. The four casters 12 are respectively installed at the four corners of the bottom of the base plate 11. The casters 12 not only enable the lifting mechanism 10 to move flexibly, but also fix the position when needed by the brake pads, ensuring that the equipment remains stable during operation.

[0058] The fixed end of the hydraulic cylinder 13 is installed on the top of the base plate 11, and the telescopic end of the hydraulic cylinder 13 is connected to the bottom of the mounting frame 211. There are two telescopic rods 14, with the fixed ends of the two telescopic rods 14 installed on the top sides of the base plate 11 respectively, and the movable ends of the two telescopic rods 14 connected to the bottom sides of the mounting frame 211 respectively, providing auxiliary support and stability. The telescopic rods 14 can move synchronously with the extension and retraction of the hydraulic cylinder 13, ensuring that the mounting frame 211 remains horizontal during lifting and lowering, and avoiding tilting or swaying due to uneven force on one side.

[0059] Through the coordinated operation of hydraulic cylinder 13 and telescopic rod 14, lifting mechanism 10 can achieve smooth lifting and lowering of mounting frame 211, suitable for working needs at different heights.

[0060] The casters 12 can push the base plate 11 to move so that the sandpaper 46 can move along the length of the pipe, making it easier to grind multiple welds on the pipe. The hydraulic cylinder 13 can drive the mounting bracket 211 to move up and down, thereby driving the lower housing 311 to move up and down to adapt to pipes of different heights.

[0061] Working principle: During grinding, the device is first moved to the bottom of the pipe by the casters 12. The hydraulic cylinder 13 drives the lower housing 311 to move upward through the mounting bracket 211. When the lower housing 311 moves upward, the two rotating rollers 448 are spread open by the action of the pipe. At the same time, under the action of the torque spring on the hinge seat 441, the two rotating rollers 448 are pressed against the outside of the pipe. Then, the sliding shaft 446 is locked in the hinge cylinder 442 by the fixing part 443. During the upward movement of the lower housing 311, the top pressure roller 436 moves upward synchronously with the lower housing 311. When the inner side of the sandpaper 46 located below is pressed against the outside of the pipe, the top pressure roller 436 presses against the outside of the pipe.

[0062] After the sandpaper 46 located below is attached to the outside of the pipe, the upper housing 321 is installed on top of the lower housing 311, so that both sandpaper 46 are attached to the outer wall of the pipe.

[0063] After the abrasive cloth 46 is applied to the pipe, the locking seat 333 unlocks the rotating shaft 332, allowing the two rotating rings 411 to rotate. Then, the motor 421 is started, and the motor 421 drives the two abrasive cloths 46 to rotate through the gear 422, thereby causing the abrasive cloths 46 to rotate on the surface of the pipe to polish the pipe.

[0064] During the grinding process of the abrasive cloth 46 on the pipe, the top pressure roller 436, under the action of the spring 432, presses the abrasive cloth 46 against the pipe. When the abrasive cloth 46 contacts the weld area with a larger protrusion, the spring 432 can apply a greater reaction force to the top pressure roller 436, thereby allowing the top pressure roller 436 to apply a greater top pressure to the abrasive cloth 46 relative to the area where the abrasive cloth 46 contacts the weld with a smaller protrusion. This allows for precise "reinforced grinding" of the weld with a larger protrusion, meaning that the abrasive cloth 46 can obtain greater grinding force when passing over the protruding weld. When the weld protrusion is ground to be flush with the area of ​​the pipe without a weld, the reaction force of the spring 432 decreases, maintaining only the contact between the top pressure roller 436 and the outer surface of the pipe, without further "reinforced grinding," to prevent the abrasive cloth 46 from over-grinding the pipe.

[0065] During grinding, the motor 45 can drive the abrasive cloth 46 to rotate in the opposite direction to the rotation of the rotating ring 411, thereby enhancing the grinding effect on the pipe weld while changing the grinding surface of the abrasive cloth 46.

[0066] When gear 2 422 rotates, gear 2 422 can drive helical gear 1 223 to rotate through helical gear 2 423. At this time, helical gear 1 223 drives threaded sleeve 222 to reciprocate laterally on reciprocating screw 221. At the same time, threaded sleeve 222 drives lower housing 311 to reciprocate laterally on mounting bracket 211 through helical gear 1 223, so that sandpaper 46 reciprocates laterally on the surface of pipe, thereby uniformly polishing the surface of pipe.

[0067] A surface treatment method for oil pipe processing according to the present invention, which utilizes the above-mentioned surface treatment equipment for oil pipe processing, includes the following steps: S1: The hydraulic cylinder 13 drives the mounting bracket 211 and the lower housing 311 to rise, so that the inner side of the sandpaper 46 below is close to the outer surface of the pipe. At the same time, the two rotating rollers 448 are spread open and close to the outer wall of the pipe under the action of the pipe. Then the sliding shaft 446 is locked by the fixing piece 443. S2: Install the upper housing 321 onto the top of the lower housing 311 so that the two sandpaper 46 are pressed tightly against the outer wall of the pipe; S3: Rotate the locking seat 333 handle to release the lock on the rotating shaft 332, allowing the rotating ring 411 to rotate freely; Subsequently, motor 421 drives the lower rotating ring 411 to rotate through gear 422, which in turn drives the upper rotating ring 411 to rotate synchronously. The rotating ring 411 drives the sandpaper 46 to rotate around the outer wall of the pipe through the adjusting component 44 and the top pressure component 43, and performs circumferential grinding on the weld. S4: During the grinding process, the spring 432 in the top pressure assembly 43 continuously applies pressure towards the pipe to the top pressure roller 436, making the abrasive cloth 46 adhere tightly to the weld. When the abrasive cloth 46 passes through a weld with a high protrusion, the top pressure roller 436 is compressed by the reverse force, increasing the grinding pressure of the abrasive cloth 46 on that part, thus achieving localized pressure grinding. When the weld protrusion is ground to be flush with the pipe, the top pressure roller 436 returns to normal pressure to prevent over-grinding. S5: Motor 45 drives the sandpaper 46 to rotate in the opposite direction to the rotation of the rotating ring 411 via the rotating roller 448 to enhance the grinding effect. At the same time, motor 421 drives the helical gear 223 on the helical gear 423 to rotate via gear 422. The helical gear 223 drives the threaded sleeve 222 to reciprocate along the reciprocating screw 221, thereby driving the lower housing 311 to reciprocate along the pipe axis to achieve uniform grinding of the weld.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A surface treatment device for oil pipe processing, comprising an installation mechanism (20), a support mechanism (30), and two grinding mechanisms (40), characterized in that, The support mechanism (30) is annular and has a through hole for the pipe to pass through. The through hole has a main axis extending in the front and back. Two grinding mechanisms (40) are distributed on the upper and lower sides of the main axis. The grinding mechanism (40) includes a transmission assembly (41) and a sanding belt mechanism installed in the transmission assembly (41). The transmission assembly (41) includes a rotating ring (411) and a drive assembly (42). The rotating ring (411) is mounted in the support mechanism (30) and rotates around the main axis. The drive assembly (42) is used to drive the rotating ring (411) to rotate. The transmission assembly (41) is used to drive the sanding belt mechanism to rotate around the central axis. The sanding belt mechanism includes a top pressure assembly (43), two adjustment assemblies (44), an annular sandpaper (46), and a motor (45). The adjustment assembly (44) includes a rotating roller (448) and an elastic connector. The two rotating rollers (448) are radially and elastically connected to the rotating ring (411) along the main axis through the elastic connector and are distributed left and right. The top pressure assembly (43) includes a top pressure roller (436) located between the two rotating rollers (448) and an elastic support. The two ends of the sandpaper (46) are fitted on the rotating rollers (448), and the middle part of the sandpaper (46) is fitted on the top pressure roller (436). The top pressure roller (436) is radially and elastically connected to the rotating ring (411) along the main axis through the elastic support to increase the sanding force of the sandpaper (46) on the protruding parts of the pipe weld.

2. The surface treatment equipment for tubing processing according to claim 1, characterized in that, The support mechanism (30) includes a lower support component (31), an upper support component (32) and a locking component (33). The upper support component (32) is disposed on the lower support component (31), and the locking component (33) is disposed inside the upper support component (32).

3. The surface treatment equipment for oil pipe processing according to claim 2, characterized in that, The lower support assembly (31) includes a lower housing (311), connecting blocks (312), a protective cover (313), and sliders (314). The lower housing (311) is slidably mounted on the mounting mechanism (20). The two connecting blocks (312) are respectively mounted on the top of the two sides of the lower housing (311). The protective cover (313) is mounted on the bottom of the lower housing (311) and is connected to the interior of the lower housing (311). The two sliders (314) are respectively mounted on the bottom sides of the lower housing (311). The drive assembly (42) is located on one side of the protective cover (313).

4. The surface treatment equipment for tubing processing according to claim 3, characterized in that, The upper support assembly (32) includes an upper shell (321) and two connecting blocks (322). The two connecting blocks (322) are respectively installed on the bottom sides of the upper shell (321). The connecting block (312) and the connecting block (322) are fixed together by bolts. Rotating grooves (323) for sliding of the transmission assembly (41) are provided on both sides of the inner wall of the upper shell (321) and the lower shell (311).

5. The surface treatment equipment for tubing processing according to claim 4, characterized in that, The locking assembly (33) includes a gear (331), a rotating shaft (332), and a locking seat (333). The gear (331) is located on the top side of the upper rotating ring (411) and meshes with the rotating ring (411). The rotating shaft (332) is installed at one end of the gear (331). One end of the rotating shaft (332) passes through one side of the upper housing (321) and extends to the outside of the upper housing (321). The locking seat (333) is located on the outside of one end of the rotating shaft (332).

6. The surface treatment equipment for tubing processing according to claim 3, characterized in that, The drive assembly (42) includes a motor (421), a second gear (422), and a second helical gear (423). The motor (421) is mounted on one end of the protective cover (313). The second gear (422) is mounted on the motor (421). The second gear (422) is located at the bottom of the lower rotating ring (411) and meshes with the rotating ring (411). The second helical gear (423) is mounted on one end of the second gear (422) and is located below the lower rotating ring (411).

7. The surface treatment equipment for tubing processing according to claim 1, characterized in that, The adjustment assembly (44) further includes a hinge cylinder (442), a sliding shaft (446), and a rotating frame (447). The hinge cylinder (442) is hinged to the inside of the rotating ring (411). The sliding shaft (446) is radially elastically slidably connected to the inside of the hinge cylinder (442) along the main axis. The rotating frame (447) is mounted on the top of the sliding shaft (446). The rotating roller (448) is rotatably connected to the inside of the rotating frame (447) and the rotating roller (448) protrudes from the top of the rotating frame (447).

8. The surface treatment equipment for tubing processing according to claim 6, characterized in that, The mounting mechanism (20) includes a mounting component (21) and a sliding component (22), the lower housing (311) is slidably connected to the mounting component (21), and the sliding component (22) is disposed inside the mounting component (21).

9. The surface treatment equipment for oil pipe processing according to claim 8, characterized in that, The mounting assembly (21) includes a mounting bracket (211), two slides (212) and two baffles (213). The two slides (212) are respectively opened on the top sides of the mounting bracket (211). The slider (314) on the lower housing (311) is slidably connected in the slides (212). The two baffles (213) are respectively installed on the front and rear sides of the mounting bracket (211).

10. A surface treatment method for oil pipe processing, characterized in that, The surface treatment equipment for tubing processing according to any one of claims 1-9 is used, comprising the following steps: S1: The hydraulic cylinder (13) drives the lower housing (311) to rise, so that the inner side of the sand cloth (46) below is close to the outer surface of the pipe. At the same time, the two rotating rollers (448) are spread open and close to the outer wall of the pipe under the action of the pipe, and then the sliding shaft (446) is locked by the fixing piece (443). S2: Install the upper housing (321) onto the top of the lower housing (311) so that the two sandpapers (46) are pressed together against the outer wall of the pipe; S3: Rotate the locking seat (333) handle to release the lock of the rotating shaft (332), so that the rotating ring (411) can rotate freely. Then, the motor (421) drives the lower rotating ring (411) to rotate through the gear two (422), which in turn drives the upper rotating ring (411) to rotate synchronously, so that the sandpaper (46) rotates around the outer wall of the pipe. S4: When the abrasive cloth (46) passes through the weld with a high protrusion, the top pressure roller (436) is compressed by the reverse force of the spring (432), increasing the grinding pressure of the abrasive cloth (46) on this part. When the weld protrusion is ground to be flush with the pipe, the top pressure roller (436) returns to normal pressure. S5: Motor 1 (45) drives the sandpaper (46) to rotate in the opposite direction to the rotation of the ring (411) via the rotating roller (448) to enhance the sanding effect.

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