Circumferential weld grinding device

Abstract

An embodiment of the present application provides an annular weld grinding device, which relates to the technical field of annular weld grinding devices, and includes a main frame, a mobile structure, a lifting and rotating structure, a supporting structure, a rotating drive structure, and an engaging drive structure; the mobile structure is arranged on the left side of the main frame, and the mobile structure can move relative to the main frame; the lifting and rotating structure is movably arranged above the mobile structure and can move up and down and change its position above the mobile structure; the support structure is fixedly arranged inside the main frame for supporting pipes of different diameters; the rotating drive structure is fixedly arranged on the right side of the main frame for driving the pipe to be ground to rotate when the support structure is driven; the engaging drive structure is fixedly arranged on the bottom wall of the main frame for adjusting the support span of the support structure. The device as a whole replaces multi-step manual grinding with machinery, improves grinding efficiency, ensures grinding quality, and reduces manual labor intensity.

Description

Technical Field

[0001] The present application relates to the technical field of grinding annular welds, and in particular to an annular weld grinding device. Background Art

[0002] Circular welds are welding marks left after various circular materials are welded together. The welds formed by circular welding are closed circular rings and are commonly seen in pipeline welding. Welding slag, oxides and other impurities will be generated during the welding process. If they are not removed in time, the strength and durability of the weld will be affected. Grinding equipment is needed to grind them. Grinding can effectively remove impurities and improve the quality of the weld. Grinding can make the weld surface smoother, improve the appearance quality of the weld, make it more beautiful, and improve mechanical properties and corrosion resistance.

[0003] Currently, when grinding the annular welds on some materials, a manual handheld grinding mechanism is used for grinding. The grinding method of the handheld grinding mechanism is unstable and cannot guarantee the grinding quality. When the handheld grinding method is used, the overall specifications of the grinding device usually used are small, resulting in low grinding efficiency and increased manual workload. Summary of the Invention

[0004] An embodiment of the present application provides a circular weld grinding device to solve the problem of low efficiency in manual grinding of circular welds in the prior art.

[0005] An embodiment of the present application provides an annular weld grinding device, comprising: a main frame, a movable structure, a lifting and rotating structure, a supporting structure, a rotating drive structure and an engaging drive structure; the movable structure is arranged on the left side of the main frame, and the movable structure can move relative to the main frame; the lifting and rotating structure is movably arranged above the movable structure and can move up and down and change its position above the movable structure; the supporting structure is fixedly arranged inside the main frame for supporting pipes of different diameters; the rotating drive structure is fixedly arranged on the right side of the main frame for driving the pipe to be ground on the supporting structure to rotate; the engaging drive structure is fixedly arranged on the bottom wall of the main frame for adjusting the support span of the supporting structure.

[0006] In a feasible implementation, the movable structure includes a movable base, a limiting column, an adjusting stud, and a fixed vertical plate. The movable base is arranged on the left side of the main frame, the limiting column passes through the movable base and is fixedly connected to the left side of the main frame, the adjusting stud is located between the two limiting columns and passes through the main frame and is fixedly connected to the left side of the main frame through a seat bearing, the fixed vertical plate is symmetrically arranged on the upper surface of the main frame, and a threaded groove matching the adjusting stud is opened at the place where the movable base is passed through by the adjusting stud, and the adjusting stud can be screwed together with the movable base.

[0007] In a feasible implementation, running wheels are mounted on the lower surface of the movable base via a fixing frame.

[0008] In a feasible implementation, the lifting and rotating structure includes a lifting frame, a first motor, a rotating disk and a first telescopic cylinder. The lifting frame is movably mounted on the outside of the fixed vertical plate, the first motor is fixedly installed on the left side of the lifting frame, and the rotating disk is fixedly installed on the right side of the lifting frame. The output shaft of the first motor passes through the lifting frame and is fixedly connected to the left side of the rotating disk. The output shaft of the first motor can rotate freely. The first telescopic cylinder is arranged below the lifting frame. The telescopic end of the first telescopic cylinder is fixedly connected to the lower surface of the lifting frame, and the lower end of the first telescopic cylinder is fixed to the upper surface of the mobile base.

[0009] In a feasible implementation, the engaging groove is opened on the right side of the rotating disk, the engaging groove is T-shaped as a whole, the grinding block is arranged inside the engaging groove, and a partition block is fixedly formed in the middle of the engaging groove body. The screw rod passes through the disk body between the rotating disk and the engaging groove from the outside of the rotating disk. There are two screw rods and the inner ends are fixedly connected to the upper and lower sides of the partition block through a seat bearing. A rotating wheel for easy rotation is formed on the outer end of the screw rod, and the screw rod body passes through the grinding block and is screwed with it.

[0010] In a feasible implementation, the support structure includes a support rod, a support plate, a fixed block, a transmission shaft and a supporting wheel. The support rod is arranged in a front-to-back direction inside the main frame. There are four support rods in total. The support plates are symmetrically arranged in a front-to-back direction inside the main frame. There are two support plates in total. The support rod passes through the support plate. The fixed blocks are distributed on the upper surface of the support plate. The transmission shaft is distributed in a left-right direction above the two fixed blocks. The transmission shaft passes through the fixed block. The supporting wheels are distributed on the transmission shaft shaft and do not contact the main frame.

[0011] In a feasible implementation, the pulley is fixedly arranged at the right end of the transmission shaft, the transmission belt is installed in the pulley groove, the meshing tooth plate is distributed on the inner side of the support plate, and the meshing tooth plate is symmetrically distributed about the center of the main frame.

[0012] In a feasible implementation, the rotation drive structure includes an extension base, a second telescopic cylinder, a mounting frame and a second motor, the extension base is formed on the right side of the bottom wall of the main frame, the second telescopic cylinder is fixedly arranged on the upper surface of the extension base, the mounting frame is fixedly installed on the upper end of the second telescopic cylinder, the second motor is fixedly installed on the right side of the mounting frame, the output shaft of the second motor passes through the mounting frame, and the pulley is fixedly installed on the left end of the output shaft of the second motor, and the pulley here can be linked with the transmission belt.

[0013] In a feasible implementation, the meshing drive structure includes a third motor and a transmission gear, the third motor is fixedly embedded in the bottom wall of the main frame, the output shaft of the third motor extends upward through the bottom wall of the main frame, and the transmission gear is fixed to the upper end of the output shaft of the third motor.

[0014] In a feasible implementation, the transmission gear is fixedly arranged in the middle portion above the bottom wall of the main frame.

[0015] The embodiment of the present application provides an annular weld grinding device;

[0016] The adjusting screw in the movable structure is rotated to engage with the movable base, so that the movable base can move along the limit column and cooperate with the walking wheel to complete the movement, so that the lifting and rotating structure can move left and right, and the position of the lifting and rotating structure is adjusted. At the same time, the screwing screw in the lifting and rotating structure is rotated to engage with the screwing screw and the grinding block, so that the two grinding blocks are respectively adjusted to contact the inner and outer walls of the workpiece to be ground. The position of the grinding block is adjustable, and workpieces of different diameters to be ground are ground. The above steps are interspersed until the two grinding blocks contact the inner and outer walls of the workpiece to be ground. After the position is determined, the first motor is started, and the first motor is used to drive the rotating disk and the grinding block to rotate, so as to perform rotational grinding on the workpiece to be ground;

[0017] Secondly, by controlling the rotation of the third motor in the meshing drive mechanism, the transmission gear rotates, and when the transmission gear rotates, it meshes with the meshing tooth plates on the inner side of the support plate, so that the support plates move away from or approach each other, thereby making the transmission shaft and the supporting wheel move away from or approach each other, so that the specifications of the workpiece to be polished that can be supported can be changed, which is convenient for supporting and fixing workpieces to be polished with different diameters. In this process, the pulleys at the ends of the transmission shaft move away from or approach each other, and cooperate with the second telescopic cylinder to drive the mounting frame, the second motor and the pulley on the output shaft of the second motor to move up and down. When the transmission shaft and the supporting wheel move away from or approach each other, the transmission belt can be kept taut, and the pulley on its output shaft is driven to rotate by the second motor, and the transmission belt is used to rotate the transmission shaft and the supporting wheel. The first motor and the second motor rotate in opposite directions, so that the relative speed of the workpiece to be polished increases, which is convenient for improving the polishing efficiency. The overall multi-step manual polishing is replaced by machinery, which improves the polishing efficiency, ensures the polishing quality, and reduces the labor intensity of manual work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the adjusting screw and the limiting column of this application;

[0021] Figure 3 This is a schematic diagram of the meshing drive structure of the present application;

[0022] Figure 4 This is a schematic diagram of the distribution position of the meshing tooth plates of the present application;

[0023] Figure 5 This is a schematic diagram of the rotating disk structure of this application;

[0024] Figure 6 This is a schematic diagram of the mobile structure, lifting and rotating structure of this application;

[0025] Figure 7 This application Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0026] Description of reference numerals:

[0027] 100-main frame; 200-support legs; 300-mobile structure; 400-lifting and rotating structure; 500-support mechanism; 600-rotation drive structure; 700-engagement drive structure

[0028] 310-mobile base; 320-limiting column; 330-travel wheel; 340-adjusting stud; 350-fixed vertical plate;

[0029] 410 - lifting frame; 420 - first motor; 430 - rotating disk; 440 - engaging groove; 450 - first telescopic cylinder; 460 - screw rod; 470 - grinding block; 480 - adjusting wheel; 490 - partition block;

[0030] 510-support rod; 520-support plate; 530-fixed block; 540-transmission shaft; 550-support wheel; 560-pulley; 570-transmission belt; 580-meshing gear plate;

[0031] 610-Extension base; 620-Second telescopic cylinder; 630-Mounting frame; 640-Limiting column; 650-Second motor;

[0032] 710-third motor; 720-transmission gear. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0034] Please refer to Figure 1-Figure 7A soil sampling and drilling device for an annular weld grinding device includes: a main frame 100, a support leg 200, a mobile structure 300, a lifting and rotating structure 400, a supporting structure 500, a rotating drive structure 600, and an engaging drive structure 700. The mobile structure 300 is arranged on the left side of the main frame 100. The mobile structure 300 can move relative to the main frame 100. The mobile structure 300 includes a mobile base 310, a limiting column 320, an adjusting stud 340, and a fixed vertical plate 350. The mobile base 310 is arranged on the left side of the main frame 100. The limiting column 320 passes through the mobile base 310 and is fixedly connected to the left side of the main frame 100. The mobile base 310 can slide left and right along the limiting column 320. The limiting column 320 can adjust the movement of the mobile base 310. The path is restricted so that it can move stably. The adjusting stud 340 is located between the two limit columns 320 and passes through the main frame 100 and is fixedly connected to the left side of the main frame 100 through a seat bearing, so that the adjusting stud 340 can rotate. The fixed vertical plate 350 is symmetrically arranged on the upper surface of the main frame 100. The mobile base 310 is penetrated by the adjusting stud 340 and is provided with a thread groove matching the adjusting stud 340. The adjusting stud 340 is screwed together with the mobile base 310, so that the adjusting stud 340 can drive the mobile base 310 to move. The adjusting stud 340 can be screwed together with the mobile base 310. The lower surface of the mobile base 310 is installed with a walking wheel 330 through a fixed frame. The setting of the walking wheel 330 can support the mobile base 310, making its overall structure more stable.

[0035] When adjusting the left and right position of the mobile base 310 , the adjusting screw 340 is rotated, and the adjusting screw 340 rotates and screws with the mobile base 310 , so that the mobile base 310 slides stably left and right along the limiting column 320 under the support of the walking wheel 330 .

[0036] Please refer to Figures 1-6 The lifting and rotating structure 400 is movably arranged above the mobile structure 300 and can move up and down and change its position above the mobile structure 300. The lifting and rotating structure 400 includes a lifting frame 410, a first motor 420, a rotating disk 430, and a first telescopic cylinder 450. The lifting frame 410 is movably sleeved on the outside of the fixed vertical plate 350, the first motor 420 is fixedly installed on the left side of the lifting frame 410, and the rotating disk 430 is fixedly installed on the right side of the lifting frame 410. The output shaft of the first motor 420 passes through the lifting frame 410 and is fixedly connected to the left side of the rotating disk 430. The output shaft of the first motor 420 can rotate freely. The first telescopic cylinder 450 is arranged below the lifting frame 410. The extension and retraction of the first telescopic cylinder 450 can directly drive the lifting frame 410 to rise and fall, change the position of the rotating disk 430, so as to find the center of the workpieces to be polished with different diameters.

[0037] The telescopic end of the first telescopic cylinder 450 is fixedly connected to the lower surface of the lifting frame 410, and the lower end of the first telescopic cylinder 450 is fixed to the upper surface of the movable base 310. The engaging groove 440 is opened on the right side of the rotating disk 430. The setting of the engaging groove 440 is convenient for limiting the moving path of the grinding block 470 therein. The engaging groove 440 is T-shaped as a whole.

[0038] The grinding block 470 is arranged in the engaging groove 440. There are two grinding blocks 470 with different shapes. One grinding block 470 is used to grind the outer wall and weld wall of the workpiece to be ground, and the other grinding block 470 is used to grind the inner wall and weld wall of the workpiece to be ground. The dividing block 490 is fixedly formed in the middle of the engaging groove 440. The screwing screw 460 passes through the disk body between the rotating disk 430 and the engaging groove 440 from the outside of the rotating disk 430. There are two screwing screws 460 and the inner ends are fixedly connected to the upper and lower sides of the dividing block 490 through the seat bearing. The setting of the seat bearing enables the screwing screw 460 to rotate. A rotating wheel for easy rotation is formed at the outer end of the screwing screw 460. The rod body of the screwing screw 460 passes through the grinding block 470 and is screwed with it, so that the screwing screw 460 can drive the grinding block 470 to move along the engaging groove 440.

[0039] When adjusting the position of the grinding block 440, first control the first telescopic cylinder 450 to extend and retract. The extension of the first telescopic cylinder 450 drives the lifting frame 410 to move up and down along the fixed vertical plate, thereby driving the rotating disk 430 to move up and down, so as to align the center position of the workpiece to be ground. Then, the two screw rods 460 are rotated respectively so that the grinding surfaces of the two grinding blocks 470 are roughly aligned with the inner and outer walls of the workpiece to be ground.

[0040] Please refer to Figure 1-Figure 4 The support structure 500 is fixedly arranged inside the main frame 100 and is used to support pipes of different diameters. The support structure 500 includes support rods 510, support plates 520, fixed blocks 530, transmission shafts 540 and supporting wheels 550. The support rods 510 are arranged inside the main frame 100 in a front-to-back direction. There are four support rods 510 in total. The support plates 520 are symmetrically arranged inside the main frame 100 in a front-to-back direction. There are two support plates 520 in total. The support rods 510 pass through the support plates 520. The fixed blocks 530 are distributed on the upper surfaces of the support plates 520. The transmission shafts 540 are distributed above the two fixed blocks 530 in a left-right direction. The transmission shafts 540 pass through the fixed blocks 530. The supporting wheels 550 are distributed on the shafts of the transmission shafts 540 and do not contact the main frame 100. The supporting wheels 550 rotate synchronously with the transmission shafts 540, so that the supporting wheels 550 can rotate smoothly, thereby driving the workpiece to be polished to rotate.

[0041] The pulley 560 is fixedly mounted on the right end of the transmission shaft 540, the transmission belt 570 is installed in the wheel groove of the pulley 560, and the meshing gear plates 580 are distributed on the inner side of the support plate 520. The meshing gear plates 580 are symmetrically distributed about the center of the main frame 100. The meshing drive structure 700 includes a third motor 710 and a transmission gear 720. The third motor 710 is fixedly embedded in the bottom wall of the main frame 100. The output shaft of the third motor 710 extends upward through the bottom wall of the main frame 100. The transmission gear 720 is fixed to the upper end of the output shaft of the third motor 710. The transmission gear 720 is fixedly mounted in the middle of the upper bottom wall of the main frame 100. The transmission gear 720 can mesh with the two meshing gear plates 580. When the transmission gear 720 rotates, the two meshing gear plates 580 can be moved away from or closer to each other.

[0042] Please refer to Figures 1-6 , for workpieces to be polished with different diameters, the span between the supporting wheels 550 is adjusted, and the third motor 710 is started. The third motor 710 rotates to drive the transmission gear to rotate, and the transmission gear 720 engages with the two meshing tooth plates 580 when it rotates; when the transmission gear 720 rotates, the two meshing tooth plates 580 can be moved away from or closer to each other, thereby driving the support plates 520 to move away from or closer to each other along the support rod 510, so that the support plates 520, the fixed block 530, the transmission shaft 540, and the supporting wheels 550 move away from or closer to each other, adapting to different workpieces to be polished.

[0043] The rotation drive structure 600 is fixedly mounted on the right side of the main frame 100 and is used to drive the support structure 500 to rotate the pipe to be polished. The rotation drive structure 600 includes an extension base 610, a second telescopic cylinder 620, a mounting bracket 630, and a second motor 650. The extension base 610 is formed on the right side of the bottom wall of the main frame 100. The second telescopic cylinder 620 is fixedly mounted on the upper surface of the extension base 610. The mounting bracket 630 is fixedly mounted on the upper end of the second telescopic cylinder 620. The extension and retraction of the second telescopic cylinder 620 drives the mounting bracket 630 to move up and down, thereby moving the second motor 650 and the pulley 560 up and down, facilitating the adjustment of the pulley 560's position and keeping the drive belt 570 taut for convenient transmission. The second motor 650 is fixedly mounted on the right side of the mounting bracket 630. The output shaft of the second motor 650 extends through the mounting bracket 630. The pulley 560 is fixedly mounted on the left end of the output shaft of the second motor 650, where the pulley 560 and the drive belt 570 can be linked.

[0044] Before adjusting the span between the support wheels 550, if a workpiece with a smaller diameter needs to be polished, the spacing between the pulleys 560 on the drive shaft 540 will decrease, and the drive belt 570 will become loose. It is necessary to control the second telescopic cylinder 620 to retract, driving the second motor 650 and the pulley 560 downward to tighten the drive belt 570. If a workpiece with a smaller diameter needs to be polished, the spacing between the pulleys 560 on the drive shaft 540 will increase, and the drive belt 570 will become tight. It is necessary to control the second telescopic cylinder 620 to extend, driving the second motor 650 and the pulley 560 upward to prevent damage to the drive belt 570 due to excessive tension.

[0045] Working Principle: Before using the device, first adjust the span between the supporting wheels 550 according to the specifications of the workpiece to be polished, start the third motor 710, and the rotation of the third motor 710 drives the transmission gear to rotate. When the transmission gear 720 rotates, it can cause the two meshing tooth plates 580 to move away from or closer to each other, thereby driving the support plate 520 to move away from or closer to each other along the support rod 510, so that the support plate 520, the fixed block 530, the transmission shaft 540, and the supporting wheels 550 move away from or closer to each other to adapt to different workpieces to be polished. Then, the workpiece to be polished is stably placed on the supporting wheels 550, and the first telescopic cylinder 450 is controlled to extend and retract. The first telescopic cylinder 450 is telescopically moved to drive the lifting frame 410 to move up and down along the fixed vertical plate, thereby driving the rotating disk 430 to move up and down, so as to align the center position of the workpiece to be polished, and then the two screwing screws 460 are rotated respectively so that the polishing surfaces of the two polishing blocks 470 are roughly aligned with the inner and outer walls of the workpiece to be polished, and then the adjusting stud 340 is rotated, and the adjusting stud 340 is rotated and screwed with the movable base 310, so that the movable base 310 can slide stably left and right along the limit column 320 under the support of the walking wheel 330, so that the polishing block 470 is close to the inner and outer walls and the welding joint of the workpiece to be polished, and the position of the polishing block 470 is continuously adjusted until the polishing block 470 is close to the inner and outer walls and the welding joint of the workpiece to be polished, and the span between the supporting wheels 550 is adjusted. If a workpiece with a smaller diameter needs to be polished, the distance between the pulleys 560 on the transmission shaft 540 becomes smaller, and the transmission belt 570 becomes loose. The second telescopic cylinder 620 needs to be retracted, driving the second motor 650 and the pulley 560 downward to tighten the transmission belt 570. If a workpiece with a larger diameter needs to be polished, the distance between the pulleys 560 on the transmission shaft 540 becomes larger, and the transmission belt 570 becomes tight. The second telescopic cylinder 620 needs to be extended, driving the second motor 650 and the pulley 560 upward to prevent the transmission belt 570 from being damaged by excessive tension. The first motor 420 and the second motor 650 are then started. The first motor 420 starts to rotate the rotating disk 430, causing the polishing block 470 to rotate accordingly. Simultaneously, the second motor 650 rotates, driving the pulley 560 and the transmission belt 570 to complete the linkage, driving the transmission shaft 540 and the supporting wheel 550 to rotate, causing the workpiece to rotate, thereby accelerating the polishing process.

[0046] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0047] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A circular weld grinding device, characterized in that: It comprises a main frame (100), a moving structure (300), a lifting and rotating structure (400), a supporting structure (500), a rotating driving structure (600) and an engaging driving structure (700); The movable structure (300) is arranged on the left side of the main frame (100), and the movable structure (300) is capable of moving relative to the main frame (100); The lifting and rotating structure (400) is movably arranged above the movable structure (300) and is capable of moving up and down and changing position above the movable structure (300); The support structure (500) is fixedly arranged inside the main frame (100) and is used to support pipes of different diameters; The rotation drive structure (600) is fixedly arranged on the right side of the main frame (100) and is used to drive the pipe to be polished located on the support structure (500) to rotate; The meshing drive structure (700) is fixedly arranged on the bottom wall of the main frame (100) and is used to adjust the support span of the support structure (500); The support structure (500) comprises a support rod (510), a support plate (520), a fixing block (530), a transmission shaft (540), a supporting wheel (550), a pulley (560) and a transmission belt (570). The support rods (510) are arranged in a front-to-back direction inside the main frame (100). There are four support rods (510). The support plates (520) are arranged in a front-to-back symmetrical manner inside the main frame (100). There are two plates (520), the support rod (510) passes through the support plate (520), the fixed block (530) is distributed on the upper surface of the support plate (520), the transmission shaft (540) is distributed above the two fixed blocks (530) in the left and right directions, the transmission shaft (540) passes through the fixed blocks (530), and the supporting wheel (550) is distributed on the shaft of the transmission shaft (540) and does not contact the main frame (100); The pulley (560) is fixedly arranged on the right end portion of the transmission shaft (540), the transmission belt (570) is installed in the wheel groove of the pulley (560), the meshing tooth plate (580) is distributed on the inner side surface of the support plate (520), and the meshing tooth plate (580) is symmetrically distributed about the center of the main frame (100); The rotation drive structure (600) includes an extension base (610), a second telescopic cylinder (620), a mounting frame (630) and a second motor (650), wherein the extension base (610) is formed on the right side of the bottom wall of the main frame (100), the second telescopic cylinder (620) is fixedly arranged on the upper surface of the extension base (610), the mounting frame (630) is fixedly mounted on the upper end of the second telescopic cylinder (620), the second motor (650) is fixedly mounted on the right side of the mounting frame (630), the output shaft of the second motor (650) passes through the mounting frame (630), and the pulley (560) is fixedly mounted on the left end of the output shaft of the second motor (650), wherein the pulley (560) is linked with the transmission belt (570); The meshing drive structure (700) comprises a third motor (710) and a transmission gear (720); the third motor (710) is fixedly embedded in the bottom wall of the main frame (100); an output shaft of the third motor (710) extends upward through the bottom wall of the main frame (100); and the transmission gear (720) is fixed to the upper end of the output shaft of the third motor (710); The transmission gear (720) is fixedly arranged at the middle portion above the bottom wall of the main frame (100); when the transmission gear (720) rotates, it engages with the two meshing tooth plates (580) to drive the two meshing tooth plates (580) to move away from or towards each other.

2. The annular weld grinding device according to claim 1, characterized in that: The movable structure (300) comprises a movable base (310), a limiting column (320), an adjusting screw (340) and a fixed vertical plate (350), wherein the movable base (310) is arranged on the left side of the main frame (100), the limiting column (320) passes through the movable base (310) and is fixedly connected to the left side of the main frame (100), the adjusting screw (340) is located between the two limiting columns (320) and passes through the main frame (100) and is fixedly connected to the left side of the main frame (100) via a seat bearing, and the fixed vertical plate (350) is symmetrically arranged on the upper surface of the main frame (100), and a threaded groove matching the adjusting screw (340) is provided at the portion of the movable base (310) where the adjusting screw (340) passes through, and the adjusting screw (340) is screwed together with the movable base (310).

3. The annular weld grinding device according to claim 2, characterized in that: The lower surface of the movable base (310) is provided with walking wheels (330) via a fixing frame.

4. The annular weld grinding device according to claim 2, characterized in that: The lifting and rotating structure (400) comprises a lifting frame (410), a first motor (420), a rotating disk (430) and a first telescopic cylinder (450). The lifting frame (410) is movably sleeved on the outside of the fixed vertical plate (350). The first motor (420) is fixedly installed on the left side of the lifting frame (410). The rotating disk (430) is fixedly installed on the right side of the lifting frame (410). The output shaft of the first motor (420) passes through the lifting frame (410) and is fixedly connected to the left side of the rotating disk (430). The output shaft of the first motor (420) is freely rotatable. The first telescopic cylinder (450) is arranged below the lifting frame (410). The telescopic end of the first telescopic cylinder (450) is fixedly connected to the lower surface of the lifting frame (410). The lower end of the first telescopic cylinder (450) is fixed to the upper surface of the movable base (310).

5. The annular weld grinding device according to claim 4, characterized in that: The engaging groove (440) is opened on the right side of the rotating disk (430), and the engaging groove (440) is T-shaped as a whole. The grinding block (470) is arranged inside the engaging groove (440). A partition block (490) is fixedly formed in the middle of the engaging groove (440). The screw rod (460) passes through the disk body between the rotating disk (430) and the engaging groove (440) from the outside of the rotating disk (430). There are two screw rods (460) and the inner ends are fixedly connected to the upper and lower sides of the partition block (490) through the seat bearing. A rotating wheel for easy rotation is formed at the outer end of the screw rod (460). The screw rod (460) passes through the grinding block (470) and is screwed with it.

Images