Welding seam polishing device

Abstract

The embodiment of the invention provides a weld joint grinding device, and relates to the technical field of polishing, the weld joint grinding device comprises a base, an angle adjusting mechanism is fixedly mounted at the top of the base, a base frame is fixedly mounted at the top of the angle adjusting mechanism, and a height adjusting mechanism is fixedly mounted in the middle of the base frame; according to the equipment, a second electric push rod can be used for pushing a fixing block, a linear damper and a third electric push rod are driven to rotate and stretch out and draw back, and therefore the positions and angles of a third motor and a polishing grinding wheel are adjusted; and meanwhile, a second motor is started to drive a gear, a gear ring and a mounting frame to rotate, multiple sets of polishing grinding wheels work synchronously, efficiency is improved, the stability of welding machining is improved due to the linear damper, the design can meet the polishing requirements of pipe orifices with different diameters, and rapid and automatic polishing is achieved.

Description

Technical Field

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

[0002] Large steel pipe refers to a tubular structure with a larger diameter, which is mainly used to transport liquids, gases or other materials. Flanges are disc-shaped connectors usually made of steel with bolt holes. When welding and installing large steel pipes and flanges, the flanges must first be accurately placed on the ends of the large steel pipes, and the central axes of the two must be completely aligned, and the connecting surface of the flanges must fit tightly with the ends of the steel pipes without any gaps. Subsequently, welding processes such as manual arc welding and gas shielded welding are used to weld the flanges and the ends of the steel pipes along the circumferential direction. During the welding process, the quality of the weld must be strictly guaranteed, and various defects such as pores, slag inclusions, and incomplete penetration must be avoided. After the welding and installation of large steel pipe flanges are completed, it is very necessary to polish the inner diameter welding part of the pipe. The purpose is to remove burrs, welding slag and other debris at the welding part, so that the inner wall of the pipe becomes smooth and flat, effectively reducing fluid resistance, and improving the service life and work efficiency of the pipe. At the same time, it can also prevent impurities from accumulating at the welding part to avoid affecting the normal operation of the pipe. At present, the commonly used method is to use a manual handheld polishing device to assist in polishing. This method does have a certain degree of flexibility and can meet the needs of polishing to a certain extent. However, it also has some obvious shortcomings. Manual operation is easily affected by the worker's own skill level and working status, which leads to unstable polishing quality. In addition, long-term manual operation will bring greater labor intensity and relatively low work efficiency. Summary of the invention

[0003] The embodiment of the present application provides a weld grinding device to solve the problem of low polishing efficiency of current weld grinding devices.

[0004] The embodiment of the present application provides a weld grinding device, comprising: a base, an angle adjustment mechanism is fixedly installed on the top of the base, a base frame is fixedly installed on the top of the angle adjustment mechanism, a height adjustment mechanism is fixedly installed in the middle of the base frame, a polishing mechanism is fixedly installed on the front of the height adjustment mechanism, and a universal frame is rotatably connected to the four corners of the bottom of the base, and a universal wheel is rotatably connected to the inner side of the universal frame; The polishing mechanism includes a rotating component, which is fixedly installed on the front side of the height adjustment mechanism. A mounting frame is fixedly installed on the front side of the rotating component, a linkage component is fixedly installed on the side of the mounting frame away from the rotating component, and polishing components are fixedly installed at the front end of the linkage component in a circular arrangement with equal intervals.

[0005] In a feasible implementation, the angle adjustment mechanism includes side panels and a fixed plate, the side panels are fixedly installed on both sides of the top of the base, the inner upper ends of the side panels are rotatably connected with a rotating shaft, the bottom of the base frame and the top of the rotating shaft are fixedly connected, the fixed plate is fixedly installed on the middle part of the side of the base away from the polishing mechanism, a hinge groove is opened on the outer side of the fixed plate, a first electric push rod is hinged on the inner side of the hinge groove, the outer end of the first electric push rod is hinged with a hinge frame, and the hinge frame is fixedly connected to the height adjustment mechanism.

[0006] In a feasible implementation, the height adjustment mechanism includes a guide rail, which is fixedly installed in the middle of the inner side of the base frame, a first motor is fixedly installed on the inner bottom of the guide rail, a screw rod is fixedly installed on the output end of the first motor, a movable block is threadedly connected to the outer surface of the screw rod, the movable block is slidably connected to the inner side of the guide rail, the front side of the movable block is fixedly connected to the rotating assembly, and the back side of the guide rail is fixedly connected to the articulated frame.

[0007] In a feasible implementation, the overall cross-sectional shape of the internal cavity of the guide rail is set to be a cross shape, the top view shape of the movable block is also set to be a cross shape, and the outer surface of the movable block and the inner wall of the guide rail are fixedly connected with wear-resistant gaskets.

[0008] In a feasible implementation, a handrail frame is fixedly mounted on the top of the base, and a non-slip handrail cover is fixedly mounted on the middle part of the outer end of the handrail frame.

[0009] In a feasible implementation, the rotating assembly includes a fixed column, which is fixedly installed on the front side of the movable block, the front side of the fixed column is rotatably connected to a fixed disk, the outer side of the fixed disk is fixedly connected to a gear ring, the top of the fixed column is fixedly installed with a top plate, the upper end of the top plate is fixedly installed with a second motor, the output end of the second motor is fixedly installed with a gear, the gear and the gear ring are meshingly connected, and the mounting frame is fixedly installed on the front side of the fixed disk.

[0010] In a feasible implementation, the linkage assembly includes a second electric push rod and a mounting ring, the mounting ring is fixedly installed at the front end of the mounting frame, the second electric push rod is fixedly installed in the middle of the front side of the fixed plate, a fixed block is fixedly installed at the front end of the second electric push rod, empty grooves are evenly spaced on the outer side of the fixed block, linear dampers are hinged on the inner sides of the empty grooves, square grooves are evenly spaced on the side of the mounting ring away from the movable block, a round block is rotatably connected to the inner side of the square groove, and the inner side of the round block is fixedly connected to the outer end of the linear damper.

[0011] In a feasible implementation, the polishing assembly includes a third electric push rod, which is fixedly installed on the front side of the fixed block, a fixed frame is fixedly installed on the front end of the third electric push rod, a third motor is fixedly installed on the inner side of the fixed frame, and a polishing grinding wheel is installed on the output end of the third motor.

[0012] In a feasible implementation, a socket is fixedly installed on the back of the polishing wheel, the socket is sleeved on the outer end of the output shaft of the third motor, the outer side of the socket is threadedly connected with a mounting screw, and the socket is installed on the outer side of the output shaft of the third motor through the mounting screw.

[0013] In a feasible implementation, the mounting screw is configured as a hand-tightening screw, and the outer surface of the outer end knob of the mounting screw is fixedly connected with anti-slip protrusions at even intervals.

[0014] The embodiment of the present application provides a weld grinding device; 1. By setting a polishing mechanism, the device is provided with a polishing mechanism. When in use, the device moves to the welding nozzle of the steel pipe through the universal wheel, starts the second electric push rod to push the fixed block, drives the linear damper and the third electric push rod to rotate and extend, thereby adjusting the position and angle of the third motor and the polishing wheel. During processing, the third motor is started to rotate the polishing wheel to polish the welding part of the inner wall of the nozzle. At the same time, the second motor is started to drive the gear, gear ring and mounting frame to rotate. Multiple groups of polishing wheels work synchronously to improve efficiency. Due to the linear damper, the stability of welding processing is improved. This design can adapt to the polishing needs of nozzles of different diameters and realize fast and automatic polishing. 2. The device is also provided with a height adjustment mechanism. During use, the first motor is started to drive the screw to rotate, and the movable block is driven to slide on the inside of the guide rail, so as to flexibly adjust the height of the polishing mechanism and improve the adaptability of the overall polishing process. During the adjustment process, the first electric push rod is started to push the articulated frame to contact the guide rail, and the rotating shaft at the bottom of the mounting frame is linked to make the guide rail as a whole adjustable in angle, thereby assisting in adjusting the angle and height of the welding mechanism. Through the flexible adjustment of the angle and height, the overall polishing performance of the device is further adapted, thereby improving the adaptability and convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide 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 improper limitations on the present invention.

[0016] In the attached picture: Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present application; Figure 2It is a rear view structural schematic diagram provided by an embodiment of the present application; Figure 3 It is a bottom-up structural schematic diagram provided by an embodiment of the present application; Figure 4 It is a side view structural schematic diagram provided by an embodiment of the present application; Figure 5 It is a schematic diagram of a top view structure provided by an embodiment of the present application; Figure 6 It is a rear view structural schematic diagram of a polishing mechanism provided in one embodiment of the present application; Figure 7 It is a front structural schematic diagram of a polishing mechanism provided in an embodiment of the present application; Figure 8 This application provides an embodiment Figure 1 A is an enlarged structural diagram of FIG.

[0017] Description of reference numerals: 100-base; 200-angle adjustment mechanism; 300-base frame; 400-anti-slip armrest; 500-universal wheel; 600-polishing mechanism; 700-height adjustment mechanism; 800-armrest frame; 900-universal frame; 210-side plate; 220-fixed plate; 230-rotating shaft; 240-hinged slot; 250-first electric push rod; 260-hinged frame; 610-rotation assembly; 620-mounting frame; 630-linkage assembly; 640-polishing assembly; 611-fixed column; 612-fixed plate; 613-gear ring; 614-top plate; 615-second motor; 616-gear; 631-second electric push rod; 632-mounting ring; 633-fixing block; 634-empty slot; 635-linear damper; 636-square slot; 637-round block; 641-third electric push rod; 642-fixed frame; 643-third motor; 644-polishing grinding wheel; 645-sleeve seat; 646-installation screw; 710 - guide rail; 720 - first motor; 730 - lead screw; 740 - movable block. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0019] Example refer to Figures 1 to 8 A weld grinding device of this embodiment includes: a base 100, an angle adjustment mechanism 200 is fixedly installed on the top of the base 100, a base frame 300 is fixedly installed on the top of the angle adjustment mechanism 200, a height adjustment mechanism 700 is fixedly installed in the middle of the base frame 300, a polishing mechanism 600 is fixedly installed on the front of the height adjustment mechanism 700, and a universal frame 900 is rotatably connected to the four corners of the bottom of the base 100, and a universal wheel 500 is rotatably connected to the inner side of the universal frame 900; The polishing mechanism 600 includes a rotating assembly 610, which is fixedly mounted on the front side of the height adjustment mechanism 700. A mounting frame 620 is fixedly mounted on the front side of the rotating assembly 610. A linkage assembly 630 is fixedly mounted on the side of the mounting frame 620 away from the rotating assembly 610. A polishing assembly 640 is fixedly mounted on the front end of the linkage assembly 630 in a circular arrangement with equal spacing. The universal wheel 500 and the mounting frame 620 at the bottom of the base 100 facilitate flexible movement of the device. In the angle adjustment mechanism 200, the rotating shaft 230 on the inner side of the side plate 210 enables the base frame 300 to rotate, and the fixed plate 220 The upper hinged first electric push rod 250 cooperates with the articulated frame 260 to achieve angle adjustment, so as to better adapt to different work scenes and needs. The height adjustment mechanism 700 can flexibly change the height of the polishing mechanism 600 to improve the adaptability of the polishing process. In the polishing mechanism 600, the rotating component 610 can drive the mounting frame 620 to rotate, and the linkage component 630 can coordinate the work of each polishing component 640. The polishing components 640 arranged in an equidistant ring can improve the polishing efficiency and quality. The overall design makes the device easy, efficient and precise to operate in weld grinding, and can meet the needs of various complex working conditions.

[0020] The angle adjustment mechanism 200 includes a side plate 210 and a fixed plate 220. The side plate 210 is fixedly mounted on both sides of the top of the base 100. The inner upper end of the side plate 210 is rotatably connected with a rotating shaft 230. The bottom of the base frame 300 is fixedly connected to the top of the rotating shaft 230. The fixed plate 220 is fixedly mounted on the middle of the side of the base 100 away from the polishing mechanism 600. The outer side of the fixed plate 220 is provided with a hinge groove 240. The inner side of the hinge groove 240 is hinged with a first electric push rod 250. The outer end of the first electric push rod 250 is hinged with a hinge frame 260. The hinge frame 260 is fixedly connected to the height adjustment mechanism 700. The side plate 210 is fixedly mounted on both sides of the top of the base 100. The rotating shaft 230 at the inner upper end thereof is firmly connected to the bottom of the base frame 300, so that the base frame 300 can be flexibly rotated with the rotating shaft 230 as the axis, thereby realizing the preliminary adjustment of the device angle.

[0021] The fixed plate 220 is fixed to the middle part of one side of the base 100 away from the polishing mechanism 600. The hinge groove 240 opened on the outer side thereof provides a stable hinge position for the first electric push rod 250. The hinge frame 260 hinged at the outer end of the first electric push rod 250 is fixedly connected to the height adjustment mechanism 700. When the first electric push rod 250 is extended or retracted, the hinge frame 260 can be pushed to move, thereby driving the entire height adjustment mechanism 700 and the polishing mechanism 600 connected thereto to change the angle. This design makes it possible to accurately and quickly adjust the angle of the polishing mechanism 600 according to the position and angle requirements of the weld in actual operation, thereby greatly improving the applicability and flexibility of the device. Whether dealing with workpieces of different shapes or in complex working environments, it can ensure that the polishing mechanism 600 is accurately aligned with the weld for grinding, thereby ensuring the grinding effect and work efficiency.

[0022] The height adjustment mechanism 700 includes a guide rail 710, which is fixedly installed in the middle of the inner side of the base frame 300. A first motor 720 is fixedly installed at the bottom of the guide rail 710. A screw rod 730 is fixedly installed at the output end of the first motor 720. A movable block 740 is threadedly connected to the outer surface of the screw rod 730. The movable block 740 is slidably connected to the inner side of the guide rail 710. The front of the movable block 740 is fixedly connected to the rotating assembly 610, and the back of the guide rail 710 is fixedly connected to the articulated frame 260. The overall cross-sectional shape of the internal cavity of the guide rail 710 is set in a cross shape, and the top view shape of the movable block 740 is also set in a cross shape. The outer surface of the movable block 740 and the inner wall of the guide rail 710 are fixedly connected with wear-resistant gaskets. An armrest frame 800 is fixedly installed on the top of the base 100, and an anti-slip armrest cover 400 is fixedly installed in the middle of the outer end of the armrest frame 800.

[0023] The rotating assembly 610 includes a fixed column 611, which is fixedly installed on the front of the movable block 740. The front of the fixed column 611 is rotatably connected with a fixed disk 612, and the outer side of the fixed disk 612 is fixedly connected with a toothed ring 613. The top of the fixed column 611 is fixedly installed with a top plate 614, and the upper end of the top plate 614 is fixedly installed with a second motor 615. The output end of the second motor 615 is fixedly installed with a gear 616, and the gear 616 and the toothed ring 613 are meshed and connected. The mounting frame 620 is fixedly installed on the front of the fixed disk 612. The guide rail 710 is fixed in the middle of the inner side of the base frame 300 to provide stable support for the internal components. The first motor 720 at the bottom of the guide rail 710 drives the screw rod 730 to rotate, so that the threaded movable block 740 can slide up and down inside the guide rail 710 to achieve precise height adjustment. The cross-shaped design of the movable block 740 and the guide rail 710 and the wear-resistant gasket ensure the stability and durability of the sliding. The armrest frame 800 and the anti-slip armrest cover 400 facilitate operation and movement of the device. In the rotating assembly 610, the fixed plate 612 on the front of the fixed column 611 is meshed and connected with the gear 616 at the output end of the second motor 615 through the gear ring 613 to achieve flexible rotation. The mounting frame 620 on the front of the fixed plate 612 can rotate accordingly, so that the weld can be processed from different angles. This combination of height adjustment and rotation greatly improves the flexibility and adaptability of the device, can accurately meet various complex weld grinding requirements, and improve grinding quality and efficiency.

[0024] The linkage assembly 630 includes a second electric push rod 631 and a mounting ring 632. The mounting ring 632 is fixedly mounted on the front end of the mounting frame 620. The second electric push rod 631 is fixedly mounted in the middle of the front of the fixed plate 612. A fixed block 633 is fixedly mounted on the front end of the second electric push rod 631. Empty grooves 634 are evenly spaced on the outer side of the fixed block 633. Linear dampers 635 are hinged on the inner sides of the empty grooves 634. Square grooves 636 are evenly spaced on the side of the mounting ring 632 away from the movable block 740. A round block 637 is rotatably connected to the inner side of the square groove 636. The inner side of the round block 637 is fixedly connected to the outer end of the linear damper 635. The polishing assembly 640 includes a third electric push rod 641. The third electric push rod The movable push rod 641 is fixedly installed on the front side of the fixed block 633, the front end of the third electric push rod 641 is fixedly installed with a fixing frame 642, the inner side of the fixing frame 642 is fixedly installed with a third motor 643, the output end of the third motor 643 is installed with a polishing wheel 644, the back side of the polishing wheel 644 is fixedly installed with a socket 645, the socket 645 is sleeved on the outer end of the output shaft of the third motor 643, the outer side of the socket 645 is threadedly connected with a mounting screw 646, the socket 645 is installed on the outer side of the output shaft of the third motor 643 through the mounting screw 646, the mounting screw 646 is set as a hand-tightening screw, and the outer surface of the outer end button handle of the mounting screw 646 is fixedly connected with anti-slip protrusions at equal intervals. The mounting ring 632 is fixed at the front end of the mounting frame 620 to provide a stable foundation for the structure. The second electric push rod 631 is located in the middle of the front of the fixed plate 612, pushing the fixed block 633 at the front end to move. The linear damper 635 hinged in the empty groove 634 on the outside of the fixed block 633 is connected to the round block 637 rotatably connected in the square groove 636 on one side of the mounting ring 632. This connection method can achieve telescopic adjustment while playing a buffering and compensation role through the linear damper 635, thereby enhancing the stability and durability of the device. The third electric push rod 641 is fixed on the front side of the fixed block 633, and can accurately control the position of the front end fixed frame 642. The third motor 643 in the fixed frame 642 drives the polishing wheel 644 at the output end to work. The socket 645 is connected to the motor output shaft through a hand-tightened mounting screw 646, which is convenient for installation and replacement. The anti-slip protrusion of the button handle at the outer end of the screw increases the convenience of operation. The cooperation of the entire linkage assembly 630 and the polishing assembly 640 realizes flexible and precise adjustment of the position and angle of the polishing wheel 644, adapts to different weld grinding requirements, improves the efficiency and quality of grinding, and is more convenient for maintenance and adjustment of the device.

[0025] Principle and advantages of use: By setting up the polishing mechanism 600, the device can be moved to the welding mouth of the steel pipe by rolling on the ground with the universal wheel 500 during use. At this time, the second electric push rod 631 is started to operate. The second electric push rod 631 can be used to assist in pushing the fixed block 633 to move. At this time, the linear damper 635 in the empty groove 634 on the fixed block 633 rotates, and the linear damper 635 cooperates with the round block 637 in the square groove 636 to drive the third electric push rod 641 to be telescopically adjusted. At this time, the third electric push rod 641 rotates inside the empty slot 634, and the third electric push rod 641 rotates to assist in adjusting and driving the third motor 643 to rotate. At this time, the polishing wheel 644 at the output end of the third motor 643 can be assisted in adjusting the rotation. By rotating and adjusting the polishing wheel 644, it can be flexibly adapted to the polishing needs. During this period, the third electric push rod 641 can be started to run, and the polishing wheel 644 can be assisted in extending and retracting through the movement of the third electric push rod 641, and the position of the polishing wheel 644 can be flexibly adjusted, so that the device can be flexibly adapted to steel pipes of different diameters. In addition, during the processing, the third motor 643 can be started to run, and the third motor 643 can drive the polishing wheel 644 to rotate. The polishing wheel 644 rotates in contact with the outer welding port of the steel pipe, and the welding port on the inner wall of the pipe mouth of the steel pipe can be polished. At the same time, during the polishing process, the second motor 615 can be started to run, and the second motor 615 can assist in driving the gear 616 to rotate. The gear ring 613 can be driven to rotate by the rotation of the gear 616. The rotation of the gear ring 613 can drive the mounting frame 620 and the entire mounting ring 632 to rotate. At this time, each polishing wheel 616 44 fits inside the weld of the pipe mouth of the steel pipe and rotates to assist in polishing the inner wall of the pipe mouth of the steel pipe. Its adjustable design can flexibly adapt to the polishing of different pipe mouth diameters. At the same time, its multiple sets of polishing wheels 644 rotate and displace synchronously, so that the device as a whole can quickly and automatically polish the pipe mouth of the steel pipe, which can improve the overall polishing efficiency of the device. In addition, during the polishing process, since the linear damper 635 is set, the linear damper 635 can be used to assist in telescopic compensation and buffering, which can improve the stability of the overall welding process of the device.

[0026] By setting the height adjustment mechanism 700, during use of the device, the first motor 720 can be started to run, and the first motor 720 can be used to drive the screw rod 730 to rotate. The rotation of the screw rod 730 can assist in driving the movable block 740 to slide on the inner side of the guide rail 710. The movable block 740 slides up and down, and then the height of the polishing mechanism 600 in the device can be flexibly adjusted, which can improve the adaptability of the overall polishing processing of the device. In the adjustment process, the first electric push rod 250 can be started to run, and the first electric push rod 250 can be used to run, so that the articulated frame 260 can be pushed to contact the guide rail 710. At this time, the articulated frame 260 is linked at the first electric push rod 250, and at the same time, the bottom of the mounting frame 620 cooperates with the rotating shaft 230 to assist in linkage, so that the guide rail 710 of the device can be adjusted as a whole, and then the angle and height of the welding mechanism can be assisted in adjusting. By flexibly adjusting the angle and height of the welding mechanism, the adaptability of the overall polishing processing of the device can be further adapted, which can improve the overall adaptability and convenience of use of the device.

[0027] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0028] 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 used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A weld grinding device, characterized in that: include: A base (100), wherein an angle adjustment mechanism (200) is fixedly mounted on the top of the base (100), a base frame (300) is fixedly mounted on the top of the angle adjustment mechanism (200), a height adjustment mechanism (700) is fixedly mounted in the middle of the base frame (300), a polishing mechanism (600) is fixedly mounted on the front of the height adjustment mechanism (700), and universal frames (900) are rotatably connected to the four corners of the bottom of the base (100), and a universal wheel (500) is rotatably connected to the inner side of the universal frame (900); The polishing mechanism (600) comprises a rotating assembly (610), wherein the rotating assembly (610) is fixedly mounted on the front side of the height adjustment mechanism (700), a mounting frame (620) is fixedly mounted on the front side of the rotating assembly (610), a linkage assembly (630) is fixedly mounted on a side of the mounting frame (620) away from the rotating assembly (610), and polishing assemblies (640) are fixedly mounted on the front end of the linkage assembly (630) in a circular arrangement at equal intervals.

2. The weld grinding device according to claim 1, characterized in that: The angle adjustment mechanism (200) comprises a side plate (210) and a fixed plate (220); the side plates (210) are fixedly mounted on both sides of the top of the base (100); the inner upper ends of the side plates (210) are rotatably connected to a rotating shaft (230); the bottom of the base frame (300) is fixedly connected to the top of the rotating shaft (230); the fixed plate (220) is fixedly mounted on the middle part of a side of the base (100) away from the polishing mechanism (600); a hinge groove (240) is provided on the outer side of the fixed plate (220); a first electric push rod (250) is hingedly mounted on the inner side of the hinge groove (240); the outer end of the first electric push rod (250) is hingedly mounted to a hinge frame (260); the hinge frame (260) is fixedly connected to the height adjustment mechanism (700).

3. The weld grinding device according to claim 2, characterized in that: The height adjustment mechanism (700) comprises a guide rail (710), wherein the guide rail (710) is fixedly mounted in the middle of the inner side of the base frame (300), a first motor (720) is fixedly mounted on the inner bottom of the guide rail (710), a lead screw (730) is fixedly mounted on the output end of the first motor (720), a movable block (740) is threadedly connected to the outer surface of the lead screw (730), the movable block (740) is slidably connected to the inner side of the guide rail (710), the front side of the movable block (740) is fixedly connected to the rotating assembly (610), and the back side of the guide rail (710) is fixedly connected to the articulated frame (260).

4. The weld grinding device according to claim 3, characterized in that: The overall cross-sectional shape of the internal cavity of the guide rail (710) is arranged in a cross shape, and the top view shape of the movable block (740) is also arranged in a cross shape. The outer surface of the movable block (740) and the inner wall of the guide rail (710) are both fixedly connected with wear-resistant gaskets.

5. The weld grinding device according to claim 1, characterized in that: A handrail frame (800) is fixedly mounted on the top of the base (100), and a non-slip handrail cover (400) is fixedly mounted on the middle portion of the outer end of the handrail frame (800).

6. The weld grinding device according to claim 3, characterized in that: The rotating assembly (610) comprises a fixed column (611), wherein the fixed column (611) is fixedly mounted on the front side of the movable block (740), the front side of the fixed column (611) is rotatably connected to a fixed disk (612), the outer side of the fixed disk (612) is fixedly connected to a gear ring (613), a top plate (614) is fixedly mounted on the top of the fixed column (611), a second motor (615) is fixedly mounted on the upper end of the top plate (614), a gear (616) is fixedly mounted on the output end of the second motor (615), the gear (616) and the gear ring (613) are meshingly connected, and the mounting frame (620) is fixedly mounted on the front side of the fixed disk (612).

7. The weld grinding device according to claim 6, characterized in that: The linkage assembly (630) comprises a second electric push rod (631) and a mounting ring (632), wherein the mounting ring (632) is fixedly mounted on the front end of the mounting frame (620), the second electric push rod (631) is fixedly mounted on the middle of the front face of the fixed plate (612), a fixed block (633) is fixedly mounted on the front end of the second electric push rod (631), the outer side of the fixed block (633) is provided with empty grooves (634) at equal intervals, the inner sides of the empty grooves (634) are hinged with linear dampers (635), and the side of the mounting ring (632) away from the movable block (740) is provided with square grooves (636) at equal intervals, the inner side of the square groove (636) is rotatably connected with a round block (637), and the inner side of the round block (637) is fixedly connected to the outer end of the linear damper (635).

8. The weld grinding device according to claim 7, characterized in that: The polishing assembly (640) comprises a third electric push rod (641), the third electric push rod (641) is fixedly mounted on the front side of the fixed block (633), a fixing frame (642) is fixedly mounted on the front end of the third electric push rod (641), a third motor (643) is fixedly mounted on the inner side of the fixing frame (642), and a polishing grinding wheel (644) is mounted on the output end of the third motor (643).

9. The weld grinding device according to claim 8, characterized in that: The polishing wheel (644) is arranged in a cylindrical shape, and a sleeve seat (645) is fixedly installed on the back of the polishing wheel (644). The sleeve seat (645) is sleeved on the outer end of the output shaft of the third motor (643). The outer side of the sleeve seat (645) is threadedly connected to a mounting screw (646), and the sleeve seat (645) is installed on the outer side of the output shaft of the third motor (643) through the mounting screw (646).

10. The weld grinding device according to claim 9, characterized in that: The mounting screw rod (646) is configured as a hand-tightening screw rod, and the outer surface of the outer end knob of the mounting screw rod (646) is fixedly connected with anti-slip protrusions at even intervals.

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