Multi-station pipe surface treatment apparatus

Abstract

This invention discloses a multi-station pipe surface treatment device, relating to the field of pipe surface treatment technology. To solve the problem of uneven grinding pressure in curved sections of pipes, when the sandpaper extends into the inside of the pipe, the electric telescopic rod is activated to extend it, driving the connecting frame and the central column to move, causing the pull rope to loosen. At this time, the telescopic spring on the side of the lowest first limiting block rebounds, pushing the slider and the first connecting rod to move upward in sequence, achieving stable limiting below the flexible rod. Simultaneously, the telescopic spring on the side of the highest first limiting block rebounds synchronously, driving the lowest second limiting block to move upward. The side arc spring rebounds, pushing the guide plate and the second connecting rod to move upward in sequence, forming a trajectory that matches the curvature of the pipe, limiting the upper part of the flexible rod. This ensures that the sandpaper makes full and uniform contact with the inner surface of the pipe, making the grinding pressure consistent on the inner, outer, and transition areas of the bend.

Description

Technical Field

[0001] This invention relates to the field of pipe surface treatment technology, and in particular to a multi-station pipe surface treatment device. Background Technology

[0002] In modern industrial production, pipe fittings, as core basic components for fluid transportation and structural support, are widely used in many key fields such as aerospace, automobile manufacturing, petrochemicals, and engineering machinery. Their surface quality directly determines the performance, reliability, and service life of the products. Among them, bends occupy an important position in various piping systems because they can adapt to complex installation space layouts and avoid pipeline interference problems. Compared with straight pipes, bends have more stringent requirements for their inner surface quality.

[0003] To meet the demands of large-scale production, multi-station pipe surface treatment equipment has emerged. This equipment, through parallel operation at multiple stations, can simultaneously complete a series of surface treatment processes such as clamping, grinding, and cleaning of pipes, significantly improving production efficiency. However, current multi-station pipe surface treatment equipment generally suffers from uneven grinding of the inner surface of bent pipes, making it difficult to meet the stringent requirements of high-end applications for the quality of the inner surface of bent pipes. The specific defects are mainly reflected in the following aspects: First, existing multi-station grinding equipment often employs a rigid structure design for its grinding mechanism. These rigid grinding components struggle to adapt to the curved structure and complex curvature variations of bent pipes, especially for pipes with small radii of curvature. The rigid grinding head not only struggles to penetrate the curved section smoothly, but even if it does, it cannot guarantee full and uniform contact with the inner surface of the pipe. This leads to inconsistent grinding pressure on the inner, outer, and transitional areas of the bend, resulting in localized over-grinding and under-grinding, severely impacting the uniformity of the inner surface grinding. Simultaneously, the hard contact between the rigid grinding component and the inner wall of the bend can cause deformation of thin-walled pipes, further compromising grinding accuracy and pipe dimensional accuracy. Summary of the Invention

[0004] The purpose of this invention is to address the difficulty of adapting existing rigid grinding components to the curved structure and complex curvature changes of bends, especially for bends with small radii of curvature. Rigid grinding heads struggle to penetrate the curved portion of the bend smoothly, and even when they do, they cannot guarantee comprehensive and uniform contact between the grinding component and the inner surface of the bend. This results in inconsistent grinding pressure on the inner, outer, and transitional areas of the bend, leading to localized over-grinding and under-grinding, severely affecting the uniformity of the inner surface grinding. Furthermore, the hard contact between the rigid grinding component and the inner wall of the bend can cause deformation of thin-walled bends, further compromising grinding accuracy and pipe dimensional accuracy. Therefore, this invention proposes a multi-station pipe surface treatment device.

[0005] To achieve the above objectives, the present invention employs the following technology: a multi-station pipe surface treatment device, comprising a frame and a support frame connected to the frame, and further comprising: a drive unit and a grinding assembly disposed on the frame and the support frame; The drive unit includes a movable component connected to the frame and the support frame. A rotating component is mounted on the movable component. The rotating component includes a support plate and a connecting frame fixed on the movable component. A rotary motor is mounted on the support plate. A plurality of rotating shafts are rotatably connected to the inner wall of the connecting frame. The outer periphery of the plurality of rotating shafts and the outer periphery of the output end of the rotary motor are all connected to a second pulley. The plurality of second pulleys are connected to each other through a second belt. A fixed component is connected to the frame. A water outlet pipe is mounted on one side of the support frame. The polishing assembly includes several connecting columns fixed to one side of the connecting frame, a connecting sleeve fixed to one side of the several connecting columns, a rotating shaft connected to a rotating shaft rotating inside the connecting sleeve, a flexible rod fixed to one side of the rotating shaft, and several sandpapers connected to the outer periphery of the flexible rod. A rotary motor drives a second belt, which in turn drives several rotating shafts to rotate synchronously via a second pulley. The rotating shafts drive a rotating shaft to move a flexible rod and use sandpaper to polish the inside of the bent tube.

[0006] A further description of a multi-station pipe surface treatment device as described above: The movable component includes a fixed frame fixed to the frame and support frame. A movable plate is slidably connected to the outer periphery of the fixed frame. A movable motor is mounted on the movable plate. A threaded rod is rotatably connected to the bottom of the movable plate. The threaded rod is threadedly connected to the fixed frame. The output end of the movable motor and the outer periphery of the threaded rod are both connected to a first pulley. A first belt is connected between the two first pulleys.

[0007] A further description of a multi-station pipe surface treatment device as described above: The connecting sleeve is provided with an adjustment component, which includes two symmetrical limiting rods fixed inside the connecting sleeve. Several stacked first limiting blocks are slidably connected to the outer periphery of the limiting rods. The side of the first limiting block is provided with a limiting groove that contacts the limiting rod. Each first limiting block is provided with a first embedded groove inside. The bottom of the first limiting block is connected to a first embedded rod.

[0008] A further description of a multi-station pipe surface treatment device as described above: The first limiting block has sliding grooves on both sides that communicate with the first embedded groove. A first connecting rod is fixed to one side of the first embedded rod. The first connecting rod passes through the sliding groove of the adjacent first limiting block and is connected to a slider. A positioning rod is fixed to one side of the first limiting block. A limiting plate is fixed to the top of the positioning rod. The slider and the positioning rod are slidably connected. A telescopic spring is sleeved on the outer periphery of the positioning rod.

[0009] A further description of a multi-station pipe surface treatment device as described above: One of the first limiting blocks is provided with several stacked second limiting blocks. Each second limiting block has a second embedded groove inside. A second embedded rod is fixed to the bottom of the second limiting block. An arc groove communicating with the second embedded groove is provided on the side of the second limiting block.

[0010] A further description of a multi-station pipe surface treatment device as described above: A second connecting rod passing through an arc groove is fixed to one side of the second embedded rod, an arc-shaped rod is fixed to one side of the second limiting block, a limit plate is installed on one side of the arc-shaped rod, a guide plate connected to the second connecting rod is slidably connected to the outer periphery of the arc-shaped rod, and an arc-shaped spring is sleeved on the outer periphery of the arc-shaped rod.

[0011] A further description of a multi-station pipe surface treatment device as described above: The interiors of several first and second limiting blocks are all provided with grooves. An electric telescopic rod is installed inside the connecting sleeve. The extension end of the electric telescopic rod is connected to a connecting frame. A central column is connected between the inner walls of the connecting frame. A pull rope is connected to the outer periphery of the central column. The pull rope passes through several grooves and is connected to one of the second limiting blocks.

[0012] A further description of a multi-station pipe surface treatment device as described above: The inner wall of the connecting sleeve is fixed with a fixing plate. The inside of the fixing plate is provided with a clearance groove for the pull rope. A lower pressure plate is fixed to the side of one of the first limiting blocks. A welding frame is fixed to the fixing plate. A clamping plate is slidably connected to the inner wall of the welding frame. The top of the clamping plate is connected to an abutment block that contacts the lower pressure plate. A vertical plate is fixed on the welding frame. Several moving rods that are slidably connected to the vertical plate are fixed to one side of the abutment block. A compression spring is sleeved on the outer periphery of the moving rod.

[0013] In summary, due to the adoption of the above-mentioned technology in this multi-station pipe surface treatment equipment, the beneficial effects of this invention are: When grinding the inner surface of a fixed bend, the set drive unit, grinding components, and adjustment components first start the moving motor. Its output end drives the threaded rod to rotate through the first pulley and the first belt drive. With the help of the threaded connection between the threaded rod and the fixed frame, and the sliding cooperation between the moving plate and the fixed frame, the rotation of the threaded rod is converted into the linear movement of the moving plate, which drives the rotating components to move synchronously. After moving to the appropriate position, the rotating motor is started, and several rotating shafts are driven to rotate through the second pulley and the second belt drive. Then, the rotating shafts drive the flexible rod and the outer peripheral sandpaper to rotate at high speed, so as to achieve grinding of the inner surface of the bend. The water outlet pipe continuously supplies water to remove debris in time and remove grinding heat, effectively avoiding debris from scratching the inner surface of the bend, preventing high temperature from affecting the grinding accuracy and pipe performance, ensuring grinding quality. Moreover, the grinding of the bend is bidirectional, which reduces the time for reversing when grinding the bend and increases grinding efficiency. To address the issue of uneven grinding pressure in curved sections of pipes, when the sandpaper extends into the pipe, an electric telescopic rod is activated to extend it, moving the connecting frame and center column. This loosens the pull rope, causing the telescopic spring on the lowermost first limiting block to rebound, pushing the slider and the first connecting rod in tandem. This causes adjacent first limiting blocks to move upwards sequentially, achieving stable positioning below the flexible rod. Simultaneously, the telescopic spring on the uppermost first limiting block rebounds, causing the lowermost second limiting block to move upwards. Its side arc-shaped spring rebounds, pushing the guide plate and the second connecting rod in tandem, causing several second limiting blocks to move upwards and deflect sequentially, forming a trajectory that matches the curvature of the pipe and positioning them above the flexible rod. This ensures that the sandpaper makes full and uniform contact with the inner surface of the pipe, resulting in consistent grinding pressure on the inner, outer, and transition areas of the bend. This completely solves the problem of uneven grinding of the inner surface of pipes in existing technologies and significantly improves grinding accuracy. When the electric telescopic rod retracts, the uppermost second limiting block is reset by pulling the rope, which in turn resets each of the adjacent second limiting blocks in sequence. Subsequently, the first limiting block is reset synchronously to a vertical position, which together limit the flexible rod to maintain its straight shape. It can be directly adapted to the grinding needs of straight pipes. It can complete the surface treatment of various specifications of pipes without replacing the grinding parts, effectively expanding the application range of the equipment, reducing production and equipment maintenance costs, and improving the versatility and economy of production. Simultaneously, when one of the first limiting blocks descends, it drives the lower pressure plate to descend, pushing the abutment block to slide the clamping plate within the welding frame. The moving rod moves synchronously within the vertical plate and squeezes the compression spring. The two clamping plates simultaneously clamp the lowermost end of the limiting flexible rod, further improving the limiting stability, preventing the flexible rod from shifting shape during grinding, ensuring grinding accuracy and consistency, and extending the service life of the equipment and grinding components. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure according to the present invention is shown; Figure 2 The present invention is shown Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This diagram illustrates another overall perspective of the invention. Figure 4 The present invention is shown Figure 3 Enlarged view of a portion of point B in the middle; Figure 5 A schematic diagram of the grinding assembly structure according to the present invention is shown; Figure 6 A cross-sectional schematic diagram of the grinding assembly according to the present invention is shown; Figure 7 A schematic diagram of the adjustment component structure according to the present invention is shown; Figure 8 A schematic diagram of the first limiting block structure according to the present invention is shown; Figure 9 A schematic diagram of the disassembly structure of the first limiting block according to the present invention is shown; Figure 10 A schematic diagram of the second limiting block structure according to the present invention is shown; Figure 11 A schematic diagram of the disassembly structure of the second limiting block according to the present invention is shown; Figure 12 The present invention is shown Figure 6 A magnified view of a portion of point C in the middle.

[0015] Legend: 11. Frame; 12. Support frame; 20. Drive unit; 21. Moving assembly; 211. Fixing frame; 212. Moving plate; 213. Moving motor; 214. First pulley; 215. First belt; 216. Threaded rod; 22. Rotating assembly; 221. Support plate; 222. Rotating motor; 223. Connecting frame; 224. Rotating shaft; 225. Second pulley; 226. Second belt; 23. Fixing assembly; 24. Water outlet pipe; 30. Grinding assembly; 31. Connecting post; 32. Connecting sleeve; 33. Rotating shaft; 34. Flexible rod; 341. Sandpaper; 40. Adjustment component; 41. Limiting rod; 42. First limiting block; 421. Limiting groove; 422. First inner groove; 423. First inner rod; 424. Slide groove; 425. First connecting rod; 426. Positioning rod; 427. Slider; 428. Telescopic spring; 429. Limiting plate; 43. Second limiting block; 431. Second inner groove; 432. Second inner rod; 433. Arc groove; 434. Second connecting rod; 435, guide plate; 436, arc spring; 437, arc rod; 44, electric telescopic rod; 441, connecting frame; 442, central column; 443, pull rope; 444, pull groove; 45, fixing plate; 451, clearance groove; 452, lower pressure plate; 453, welding frame; 454, abutment block; 455, clamping plate; 456, vertical plate; 457, moving rod; 458, compression spring. Detailed Implementation

[0016] The following will describe in detail, with reference to the accompanying drawings of the embodiments of the present invention, a multi-station pipe surface treatment device according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0017] like Figures 1-12 As shown, the present invention provides a multi-station pipe surface treatment equipment, which includes a frame 11 and a support frame 12 connected to the frame 11, and further includes a drive unit 20 and a grinding assembly 30 disposed on the frame 11 and the support frame 12. like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the drive unit 20 includes a movable component 21 connected to the frame 11 and the support frame 12. The movable component 21 includes a fixed frame 211 fixed to the frame 11 and the support frame 12. A movable plate 212 is slidably connected to the outer periphery of the fixed frame 211. A movable motor 213 is mounted on the movable plate 212. A threaded rod 216 is rotatably connected to the bottom of the movable plate 212. The threaded rod 216 is threadedly connected to the fixed frame 211. The output end of the movable motor 213 and the outer periphery of the threaded rod 216 are both connected to first pulleys 214. A first belt 215 is connected between the two first pulleys 214. A rotating... Component 22, the rotating component 22 includes a support plate 221 fixed on the movable plate 212 and a connecting frame 223. A rotary motor 222 is installed on the support plate 221. A plurality of rotating shafts 224 are rotatably connected to the inner wall of the connecting frame 223. The outer periphery of the plurality of rotating shafts 224 and the outer periphery of the output end of the rotary motor 222 are all connected to a second pulley 225. The plurality of second pulleys 225 are connected to each other through a second belt 226. A fixing component 23 is connected to the frame 11. The fixing component 23 can fix the bend and prevent the bend from shifting during grinding. A water outlet pipe 24 is installed on one side of the support frame 12. One end of the water outlet pipe 24 is connected to a water tank. When grinding is required on the inner surface of the fixed bend, the moving motor 213 is started first. The output end of the moving motor 213 drives the first pulley 214 connected to it to rotate. Through the transmission action of the first belt 215, the first pulley 214 on the outer periphery of the threaded rod 216 rotates synchronously, thereby driving the threaded rod 216 to rotate. Since the threaded rod 216 is threadedly connected to the fixed frame 211 and the moving plate 212 is slidably engaged with the fixed frame 211, the rotation of the threaded rod 216 is converted into the linear movement of the moving plate 212 along the fixed frame 211, thereby driving the rotating component 22 mounted on the moving plate 212 to move synchronously. As the moving plate 212 continues to move, the rotating motor 222 is started. The output end of the rotating motor 222 drives the second pulley 225 connected to it to rotate. Through the transmission action of the second belt 226, the second pulleys 225 on the outer periphery of several rotating shafts 224 rotate synchronously, thereby driving several rotating shafts 224 to rotate.

[0018] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the polishing assembly 30 includes a plurality of connecting posts 31 fixed to one side of the connecting frame 223, a connecting sleeve 32 fixed to one side of the plurality of connecting posts 31, a rotating shaft 33 connected to the rotating shaft 224 rotating inside the connecting sleeve 32, a flexible rod 34 fixed to one side of the rotating shaft 33, and a plurality of polishing sandpaper 341 connected to the outer periphery of the flexible rod 34. The rotating shaft 224 drives the rotating shaft 33 connected to it to rotate synchronously. The rotating shaft 33 drives the flexible rod 34 and the sandpaper 341 on the outer periphery to rotate at high speed to polish the inner surface of the bend. During the polishing process, the moving component 21 can slowly drive the polishing component 30 to move along the axial direction of the bend, ensuring that all areas of the inner surface of the bend can be polished evenly. The water outlet pipe 24 continuously supplies water to remove the polishing debris and heat generated during polishing in a timely manner, so as to avoid the debris scratching the inner surface of the bend and to avoid the high temperature affecting the polishing accuracy and pipe performance.

[0019] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11As shown, an adjusting assembly 40 is provided inside the connecting sleeve 32. The adjusting assembly 40 includes two symmetrical limiting rods 41 fixed inside the connecting sleeve 32. Several stacked first limiting blocks 42 are slidably connected to the outer periphery of the limiting rods 41. The sides of the first limiting blocks 42 are provided with limiting grooves 421 that contact the limiting rods 41. Each first limiting block 42 has a first recessed groove 422 inside. The bottom of the first limiting block 42 is connected to a first recessed rod 423. The sides of the first limiting block 42 are provided with sliding grooves 424 that communicate with the first recessed grooves 422. A first connecting rod 425 is fixed to one side of the first recessed rod 423 and passes through it. A slider 427 is connected to a groove 424 formed in an adjacent first limiting block 42. A positioning rod 426 is fixed to one side of the first limiting block 42, and a limiting plate 429 is fixed to the top of the positioning rod 426. The slider 427 and the positioning rod 426 are slidably connected. A telescopic spring 428 is sleeved on the outer periphery of the positioning rod 426. Several stacked second limiting blocks 43 are provided on one of the first limiting blocks 42. A second inner groove 431 is formed inside each second limiting block 43. A second inner rod 432 is fixed to the bottom of the second limiting block 43. An arc groove 433 communicating with the second inner groove 431 is formed on the side of the second limiting block 43. One side of the second inner rod 432 is... A second connecting rod 434 is fixedly inserted through an arc groove 433. An arc-shaped rod 437 is fixed to one side of the second limiting block 43. A limiting plate 429 is installed on one side of the arc-shaped rod 437. A guide plate 435 connected to the second connecting rod 434 is slidably connected to the outer periphery of the arc-shaped rod 437. An arc-shaped spring 436 is sleeved on the outer periphery of the arc-shaped rod 437. The elastic force of the telescopic spring 428 is greater than that of the arc-shaped spring 436. A pull groove 444 is opened through the interior of several first limiting blocks 42 and second limiting blocks 43. An electric telescopic rod 44 is installed inside the connecting sleeve 32. A connecting frame 441 is connected to the extension end of the electric telescopic rod 44. A central connection is connected between the inner walls of the connecting frame 441. A central column 442 is connected to a pull rope 443 on its outer periphery. The pull rope 443 passes through several pull grooves 444 and is connected to the topmost second limiting block 43. The topmost first limiting block 42 is embedded between the first and second limiting blocks 43. The side of the second embedded rod 432 at the bottom of the second limiting block 43 is connected to a first connecting rod 425. The first connecting rod 425 passes through a sliding groove 424 opened in the adjacent first limiting block 42 and is connected to a slider 427. A positioning rod 426 is fixed on one side of the first limiting block 42. A limiting plate 429 is fixed on the top of the positioning rod 426. The slider 427 is slidably connected to the positioning rod 426. A telescopic spring 428 is sleeved on the outer periphery of the positioning rod 426. To prevent inconsistent grinding pressure of the flexible rod 34 when grinding the curved section of the pipe, the electric telescopic rod 44 is activated and extended as the sandpaper 341 gradually extends into the pipe. The electric telescopic rod 44 drives the connecting frame 441 and the central column 442 at the top to move synchronously. At this time, the pull rope 443 gradually becomes loose. Subsequently, the telescopic spring 428 on the side of the first limiting block 42 at the bottom rebounds, pushing the slider 427 to slide along the outer periphery of the positioning rod 426. This causes the positioning rod 426 to move along the slide groove 424 in conjunction with the first connecting rod 425. The adjacent first limiting block 42 connected to the first connecting rod 425 also moves upward. As each adjacent first limiting block 42 moves in sequence, the lower part of the flexible rod 34 is limited. As the first limiting blocks 42 gradually extend, the telescopic spring 428 on the side of the uppermost first limiting block 42 rebounds synchronously, pushing the slider 427 to slide along the outer periphery of the positioning rod 426, causing the lowermost second limiting block 43 to move upward. As the lowermost second limiting block 43 moves upward, the arc spring 436 on its side rebounds, pushing the guide plate 435 to slide along the outer periphery of the arc rod 437. The guide plate 435 synchronously drives the second connecting rod 434 to move along the arc groove 433, thereby causing the upper second limiting block 43 adjacent to the second limiting block 43 to move upward and deflect to one side under the action of its bottom second embedded rod 432. As the second limiting blocks 43 move upward and deflect in sequence, a bending trajectory matching the curvature of the bent pipe is gradually formed, limiting the upper part of the flexible rod 34, ensuring that the sandpaper 341 on the outer periphery of the flexible rod 34 makes full and uniform contact with the inner surface of the bent pipe, so that the sanding pressure on the inner side, outer side and transition area of ​​the bent pipe remains consistent. When the electric telescopic rod 44 retracts, it pulls the top connecting frame 441 and the central column 442 to move in opposite directions simultaneously. The central column 442 then pulls the pull rope 443, and the uppermost second limiting block 43 begins to reset under the tension of the pull rope 443. This causes the second connecting rod 434 on the side of the second embedded rod 432 at the bottom to move along the arc groove 433. The guide plate 435 connected to the second connecting rod 434 slides synchronously along the outer periphery of the arc rod 437 and squeezes the arc spring 436. When the uppermost second limiting block 43 is fully reset, it will pull the adjacent second limiting blocks 43 to reset synchronously. After all the second limiting blocks 43 are reset, the first limiting block 42 also resets and becomes vertical. At this time, the reset first limiting block 42 and the second limiting block 43 together limit the flexible rod 34, keeping the flexible rod 34 in a straight rod shape. This adapts to the grinding requirements of straight pipes, and the surface treatment of various specifications of pipes can be completed without changing the grinding parts, effectively expanding the application range of the equipment and reducing production costs.

[0020] like Figure 6 , Figure 12As shown, a fixing plate 45 is fixed to the inner wall of the connecting sleeve 32. The fixing plate 45 has an avoidance groove 451 for the avoidance rope 443. A lower pressure plate 452 is fixed to the side of one of the first limiting blocks 42. A welding frame 453 is fixed on the fixing plate 45. A clamping plate 455 is slidably connected to the inner wall of the welding frame 453. An abutment block 454 that contacts the lower pressure plate 452 is connected to the top of the clamping plate 455. A vertical plate 456 is fixed on the welding frame 453. Several moving rods 457 that are slidably connected to the vertical plate 456 are fixed to one side of the abutment block 454. A compression spring 458 is sleeved on the outer periphery of the moving rod 457. Simultaneously, as one of the first limiting blocks 42 descends, it will drive the lower pressure plate 452 to descend as well. The lower pressure plate 452 will then push the abutment block 454, causing the clamping plate 455 connected to it to slide inside the welding frame 453. At the same time, the moving rod 457 on the side of the abutment block 454 will also move synchronously within the vertical plate 456 and exert a squeezing effect on the compression spring 458. During this process, the two clamping plates 455 will simultaneously clamp and limit the lower end of the flexible rod 34, further improving the limiting effect on the flexible rod 34 and ensuring its shape stability.

[0021] Working principle: When grinding the inner surface of the fixed bent pipe, the moving motor 213 is started first. Its output end drives the connected first pulley 214 to rotate. Through the first belt 215, the first pulley 214 on the outer circumference of the threaded rod 216 rotates synchronously, thereby driving the threaded rod 216 to rotate. Since the threaded rod 216 is threadedly connected to the fixed frame 211 and the moving plate 212 is slidably engaged with the fixed frame 211, the rotation of the threaded rod 216 is converted into the linear movement of the moving plate 212 along the fixed frame 211, which synchronously drives the rotating component 22 to move. Once the moving plate 212 has moved to the appropriate position, the rotary motor 222 is started. Its output end is driven by the second pulley 225 and the second belt 226 to drive several rotating shafts 224 to rotate. In turn, the rotating shaft 33 drives the flexible rod 34 and the outer peripheral sandpaper 341 to rotate at high speed to polish the inner surface of the bend. During the polishing, the moving component 21 slowly drives the polishing component 30 to move along the axial direction of the bend to ensure uniform polishing. The water outlet pipe 24 continuously supplies water to remove debris and remove heat in time, avoiding scratches on the inner surface and affecting the polishing accuracy and pipe performance. To avoid uneven pressure on the flexible rod 34 when grinding the curved section of the pipe, when the sandpaper 341 extends into the inside of the pipe, the electric telescopic rod 44 is activated to extend it, which drives the connecting frame 441 and the central column 442 to move, causing the pull rope 443 to loosen. At this time, the telescopic spring 428 on the side of the lowest first limiting block 42 rebounds, pushing the slider 427 to slide along the positioning rod 426, which in turn moves the first connecting rod 425 along the slide groove 424, causing the adjacent first limiting blocks 42 to move upward in sequence, thereby limiting the lower part of the flexible rod 34. During the extension of the first limiting block 42, the telescopic spring 428 on the uppermost side of the first limiting block 42 rebounds synchronously, causing the lowermost second limiting block 43 to move upward. The arc spring 436 on the side of the second limiting block 43 rebounds, pushing the guide plate 435 to slide along the arc rod 437, and linking the second connecting rod 434 to move along the arc groove 433, causing the adjacent upper second limiting block 43 to move upward and deflect. Several second limiting blocks 43 are linked in sequence to form a trajectory that matches the curvature of the bend, limiting the flexible rod 34 above, ensuring that the sandpaper 341 makes full and uniform contact with the inner surface of the bend and that the sanding pressure is consistent. When the electric telescopic rod 44 retracts, it pulls the connecting frame 441 and the central column 442 to move in opposite directions. The pull rope 443 pulls the uppermost second limiting block 43 to reset. The linkage guide plate 435 squeezes the arc spring 436. Then, the adjacent second limiting blocks 43 reset in sequence. After all the second limiting blocks 43 are reset, the first limiting block 42 resets synchronously and is in a vertical state. Together, they limit the flexible rod 34 to maintain a straight rod shape, which is suitable for straight pipe grinding needs. It can handle various specifications of pipes without replacing parts, which broadens the application range of the equipment and reduces production costs. Simultaneously, when one of the first limiting blocks 42 descends, it drives the lower pressure plate 452 to descend, pushing the abutment block 454 to drive the clamping plate 455 to slide within the welding frame 453. The moving rod 457 on the side of the abutment block 454 moves simultaneously within the vertical plate 456 and squeezes the compression spring 458. The two clamping plates 455 simultaneously clamp the lowermost end of the limiting flexible rod 34, further improving the limiting effect and ensuring its shape stability.

[0022] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technology of the multi-station pipe surface treatment equipment and the inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-station pipe surface treatment equipment, comprising a frame (11) and a support frame (12) connected to the frame (11), characterized in that, Also includes: The drive unit (20) and the grinding assembly (30) are mounted on the frame (11) and the support frame (12). The drive unit (20) includes a moving component (21) connected to the frame (11) and the support frame (12). A rotating component (22) is installed on the moving component (21). The rotating component (22) includes a support plate (221) and a connecting frame (223) fixed on the moving component (21). A rotary motor (222) is installed on the support plate (221). A plurality of rotating shafts (224) are rotatably connected to the inner wall of the connecting frame (223). The outer periphery of the plurality of rotating shafts (224) and the outer periphery of the output end of the rotary motor (222) are all connected to a second pulley (225). The plurality of second pulleys (225) are connected to each other by a second belt (226). A fixing component (23) is connected to the frame (11). A water outlet pipe (24) is installed on one side of the support frame (12). The polishing assembly (30) includes several connecting posts (31) fixed to one side of the connecting frame (223), a connecting sleeve (32) fixed to one side of the several connecting posts (31), a rotating shaft (33) connected to the rotating shaft (224) rotatably inside the connecting sleeve (32), a flexible rod (34) fixed to one side of the rotating shaft (33), and several sandpapers (341) connected to the outer periphery of the flexible rod (34). The rotary motor (222) drives the second belt (226) to drive several rotating shafts (224) to rotate synchronously through the second pulley (225). The rotating shafts (224) drive the rotating shaft (33) to drive the flexible rod (34) to grind the inside of the bent pipe with sandpaper (341) on the outer periphery.

2. The multi-station pipe surface treatment equipment according to claim 1, characterized in that, The movable component (21) includes a fixed frame (211) fixed on the frame (11) and the support frame (12). A movable plate (212) is slidably connected to the outer periphery of the fixed frame (211). A movable motor (213) is installed on the movable plate (212). A threaded rod (216) is rotatably connected to the bottom of the movable plate (212). The threaded rod (216) is threadedly connected to the fixed frame (211). The output end of the movable motor (213) and the outer periphery of the threaded rod (216) are both connected to a first pulley (214). A first belt (215) is connected between the two first pulleys (214).

3. The multi-station pipe surface treatment equipment according to claim 2, characterized in that, The connecting sleeve (32) is provided with an adjustment component (40). The adjustment component (40) includes two symmetrical limiting rods (41) fixed inside the connecting sleeve (32). Several stacked first limiting blocks (42) are slidably connected to the outer periphery of the limiting rods (41). The side of the first limiting block (42) is provided with a limiting groove (421) that contacts the limiting rod (41). Each first limiting block (42) is provided with a first inner groove (422) inside. The bottom of the first limiting block (42) is connected with a first inner rod (423).

4. The multi-station pipe surface treatment equipment according to claim 3, characterized in that, The first limiting block (42) has a sliding groove (424) on both sides that communicates with the first inner groove (422). The first inner rod (423) is fixed with a first connecting rod (425) on one side. The first connecting rod (425) passes through the sliding groove (424) of the adjacent first limiting block (42) and is connected to a slider (427). The first limiting block (42) is fixed with a positioning rod (426) on one side. The top of the positioning rod (426) is fixed with a limiting plate (429). The slider (427) and the positioning rod (426) are slidably connected. The outer periphery of the positioning rod (426) is fitted with a telescopic spring (428).

5. The multi-station pipe surface treatment equipment according to claim 4, characterized in that, One of the first limiting blocks (42) is provided with several stacked second limiting blocks (43), each of the second limiting blocks (43) has a second inner groove (431) inside, a second inner rod (432) is fixed at the bottom of the second limiting block (43), and an arc groove (433) communicating with the second inner groove (431) is provided on the side of the second limiting block (43).

6. The multi-station pipe surface treatment equipment according to claim 5, characterized in that, A second connecting rod (434) passing through the arc groove (433) is fixed on one side of the second embedded rod (432), an arc rod (437) is fixed on one side of the second limiting block (43), a limiting plate (429) is installed on one side of the arc rod (437), a guide plate (435) connected to the second connecting rod (434) is slidably connected to the outer periphery of the arc rod (437), and an arc spring (436) is sleeved on the outer periphery of the arc rod (437).

7. The multi-station pipe surface treatment equipment according to claim 6, characterized in that, The interior of several first limiting blocks (42) and second limiting blocks (43) is provided with grooves (444). An electric telescopic rod (44) is installed inside the connecting sleeve (32). The extension end of the electric telescopic rod (44) is connected to a connecting frame (441). A central column (442) is connected between the inner walls of the connecting frame (441). A pull rope (443) is connected to the outer periphery of the central column (442). The pull rope (443) passes through several grooves (444) and is connected to one of the second limiting blocks (43).

8. The multi-station pipe surface treatment equipment according to claim 4, characterized in that, The inner wall of the connecting sleeve (32) is fixed with a fixing plate (45). The inside of the fixing plate (45) is provided with a clearance groove (451) for the clearance pull rope (443). A lower pressure plate (452) is fixed on the side of one of the first limiting blocks (42). A welding frame (453) is fixed on the fixing plate (45). A clamping plate (455) is slidably connected to the inner wall of the welding frame (453). The top of the clamping plate (455) is connected with an abutment block (454) that contacts the lower pressure plate (452). A vertical plate (456) is fixed on the welding frame (453). A number of moving rods (457) that are slidably connected to the vertical plate (456) are fixed on one side of the abutment block (454). A compression spring (458) is sleeved on the outer periphery of the moving rod (457).

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