A steel structure welding point grinding equipment

Abstract

The present invention relates to the technical field of steel structure weld spot grinding, and in particular to a steel structure weld spot grinding device, comprising a base and a support frame symmetrically fixed to the top of the base, guide rails are installed at the four corners of the top of the base, an electric lifting plate is installed between the guide rails, and a movable seat is installed on the electric lifting plate. The present invention twists the bidirectional screw rod to drive the limit frame to move below the sand belt, the movement of the limit frame drives the first push plate to move, the first push plate and the limit frame move to adjust the width of the sand belt grinding, start the electric lifting plate, so that the limit frame contacts the steel pipe, start the stepper motor so that the first push plate and the second push plate push the sand belt between the limit frames downward to contact the weld, start the drive motor so that the sand belt grinds the weld position, so that the limit frame, the first push plate and the second push plate can adjust the sand belt grinding width according to the width of the weld, so that welds of different widths can be accurately ground, thereby improving adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure weld point grinding, in particular to a steel structure weld point grinding device. Background Art

[0002] Steel structure is a structure made of steel materials and is one of the main types of building structures. Steel pipe is one of the most common steel structures. Usually, the length of the steel pipe does not meet the use requirements, so multiple steel pipes need to be welded together to reach the required length. Welding spots will appear at the welding points of the steel pipes, and the welding spots need to be polished.

[0003] The Chinese patent with the announcement number CN115256141B discloses a welding point grinding device for steel structure construction, including a machine base and a controller, the controller is arranged on the machine base, and a mounting seat is movably arranged on the machine base. The grinding device also includes: a driving roller, which is movably arranged on the machine base; a power element, which is arranged on the machine base and its output end is connected to the driving roller; two rotating rollers, which are symmetrically and movably arranged on the machine base, and the rotating rollers are located on one side of the mounting seat. The two rotating rollers and the driving roller are connected by belts, and the belts are triangular; a plurality of grinding strips are arranged equidistantly. It is arranged on the outer wall of the belt; and the telescopic structure, which is in several groups and symmetrically arranged on the machine base, and the telescopic structure is connected to the rotating roller. Although the above patent can grind the welds of the steel pipe, the width of the welds of different steel pipes may be different, and the width of the abrasive belt is fixed, which may lead to adaptability problems during the grinding process. It cannot adapt to welds of different widths for precise grinding, and the adaptability is low. Specifically, when the width of the abrasive belt is greater than the width of the weld, the abrasive belt will not only grind the weld, but also grind the normal pipe wall area around the weld unnecessarily. This excessive grinding not only wastes the abrasive belt resources, but more importantly, it may cause uneven thickness in the normal pipe wall area of ​​the steel pipe, thereby affecting the overall quality and structural strength of the steel pipe.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a steel structure weld spot grinding device is proposed, which can accurately grind weld spots of different widths and improve adaptability. Summary of the invention

[0005] In order to overcome the disadvantage that the widths of different steel pipe welds may be different, while the width of the sanding belt is fixed, which may lead to adaptability problems during the grinding process and inability to accurately grind welds of different widths and has low adaptability, the present invention provides a steel structure weld grinding device that can accurately grind welds of different widths and improve adaptability.

[0006] The present invention is achieved through the following technical solutions:

[0007] A steel structure welding spot grinding equipment comprises a base and a support frame symmetrically fixed to the top of the base, guide rails are installed at the four corners of the top of the base, an electric lifting plate is installed between the guide rails, a movable seat is installed on the electric lifting plate, a fixed frame is fixed to the movable seat, a guide roller is rotatably connected to the fixed frame, an abrasive belt is wound between the guide rollers, a driving motor is installed at the bottom of the movable seat, and the output shaft of the driving motor is connected to one of the ends of the guide rollers through a synchronous belt assembly for transmission, and also comprises a fixing assembly, a tensioning assembly, a sliding frame, a compression spring, a mounting frame, a limiting frame, a ball, a slide plate, a first push plate, a second push plate and a driving assembly, the fixing assembly is installed on the fixing frame for pressing and fixing the steel pipe, the tensioning assembly is installed on the movable seat for tightening the abrasive belt, The fixing frame is symmetrically slidably connected with a sliding frame, and a compression spring is connected between the sliding frame and the fixing frame, and a mounting frame is fixedly connected between the sliding frames. The mounting frame is symmetrically slidably connected with a limit frame, and the lower inner end of the limit frame is arc-shaped and is under the sand belt. The lower inner end of the limit frame is rotatably connected with balls at evenly spaced intervals, and a slide plate is slidably set between the sliding frames, and a first push plate is fixedly connected to the bottom of the slide plate, and a second push plate located on both sides of the first push plate is symmetrically slidably connected to the bottom of the slide plate, and the second push plate is slidably connected to the end of the limit frame, and a driving assembly is arranged between the sliding frame and the mounting frame, and the driving assembly is used to first drive the limit frame to move under the sand belt, so that the limit frame adjusts the sand belt grinding width, and then the first push plate and the second push plate move downward to limit the adjusted sand belt.

[0008] To further explain, the fixing assembly includes a fixing plate symmetrically fixed to the fixing frame, a cylinder is installed on the fixing plate, and the end of the telescopic rod of the cylinder is fixed with a pressing block located directly above the support frame for pressing and fixing the steel pipe.

[0009] Further explanation, the tensioning assembly includes a guide seat symmetrically fixed to the bottom of the movable seat, a sliding seat is slidably connected between the guide seats, a tensioning wheel in contact with the sanding belt is rotatably connected to the sliding seat to tighten the sanding belt, and a connecting spring is symmetrically connected between the sliding seat and the movable seat.

[0010] Further explanation, the driving assembly includes a screw rod symmetrically rotatably connected to the top of the mounting frame, the screw rod is threadedly connected to the slide plate, a stepper motor is installed on the inner side of the fixed frame, the output shaft end of the stepper motor and the bidirectional screw rod are connected through a synchronous belt assembly, a bidirectional screw rod is rotatably connected to the mounting frame, and the bidirectional screw rod is threadedly connected to the limit frame.

[0011] Further explanation, the steel structure weld grinding equipment also includes a cleaning component, which includes a rotating shaft rotatably connected to the fixed frame, the rotating shaft and one of the guide rollers are connected through a synchronous belt assembly, a brush roller in contact with the sanding belt is fixedly mounted on the rotating shaft for cleaning debris attached to the sanding belt, and a collecting component is provided on the fixed frame for collecting the removed debris.

[0012] To further explain, the collection assembly includes a dust suction frame fixedly connected to a fixing frame, the dust suction frame is located below the brush roller to collect the removed debris, and a hose is connected to the dust suction frame.

[0013] Further explanation, the steel structure weld point grinding equipment also includes a rotating component, which includes a fixed frame symmetrically fixed to the top of the base, a cross plate slidingly connected between the fixed frames, a driving roller rotatably connected to the top of the cross plate to drive the steel pipe to rotate, a servo motor is installed on the cross plate, and the output shaft of the servo motor is connected to the driving roller through a synchronous belt assembly, and a support spring is connected between the cross plate and the base.

[0014] Further description, the steel structure welding spot grinding equipment also includes a contact wheel that is evenly spaced and rotatably connected to the bottom of the first push plate and the bottom of the second push plate, and is used to reduce the friction between the first push plate, the second push plate and the sand belt.

[0015] The beneficial effects of the present invention are:

[0016] 1. First place the steel pipe between the front and rear support frames, twist the two-way screw to drive the limit frame to move under the sanding belt, the movement of the limit frame drives the first push plate to move, the first push plate and the limit frame move to adjust the width of the sanding belt grinding, then start the electric lifting plate to make the limit frame contact with the steel pipe, start the stepper motor so that the first push plate and the second push plate push the sanding belt between the limit frames downward to contact the welding point, start the drive motor to make the sanding belt grind the welding point position, in this way, through the action of the limit frame, the first push plate and the second push plate, the sanding belt grinding width can be adjusted according to the width of the welding point, so that welding points of different widths can be accurately ground, thereby improving adaptability.

[0017] 2. Under the action of the brush roller, every time the sanding belt is grinding the welding point, the rotation of the brush roller can remove the impurities attached to the sanding belt, which can prevent the sanding belt from being attached with debris and affecting the subsequent grinding effect of the welding point, thereby improving the subsequent grinding effect of the sanding belt.

[0018] 3. Under the action of the driving roller, whenever the steel pipe needs to be rotated, the driving roller can drive the steel pipe to rotate, so that the next welding point of the steel pipe is located at the top. In this way, there is no need for the operator to manually rotate the steel pipe, so that the steel pipe can be rotated more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the abrasive belt and the pressing block of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the tensioning wheel and the connecting spring of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the limiting frame, the first push plate and the second push plate of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the ball of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the cleaning component of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating assembly of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the contact wheel of the present invention.

[0027] Among them: 1-base, 2-support frame, 3-guide rail, 4-electric lifting plate, 5-movable seat, 6-fixed frame, 7-guide roller, 8-abrasive belt, 9-drive motor, 10-fixed plate, 101-cylinder, 102-pressing block, 11-guide seat, 111-sliding seat, 112-tensioning wheel, 113-connecting spring, 12-sliding frame, 13-compression spring, 14-mounting frame, 15-limiting frame, 151-ball, 16-slide plate, 17-first push plate, 18-second push plate, 20-stepping motor, 201-screw, 202-bidirectional screw, 21-rotating shaft, 211-brush roller, 212-dust suction frame, 213-hose, 22-fixed frame, 221-cross plate, 222-drive roller, 223-servo motor, 224-support spring, 23-contact wheel. DETAILED DESCRIPTION

[0028] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0029] Example: A steel structure welding spot grinding device, please refer to Figure 1-Figure 5As shown, it includes a base 1 and a support frame 2 symmetrically fixed to the top of the base 1, the support frame 2 can realize the placement of steel pipes, the four corners of the top of the base 1 are installed with guide rails 3, an electric lifting plate 4 is installed between the four guide rails 3, a movable seat 5 is installed at the bottom of the electric lifting plate 4, a fixed frame 6 is fixed to the bottom of the movable seat 5, four guide rollers 7 are rotatably connected to the fixed frame 6, a sanding belt 8 is wound between the four guide rollers 7, a driving motor 9 is installed on the right side of the bottom of the movable seat 5, and the output shaft of the driving motor 9 is connected to the front of the upper right guide roller 7 The ends are connected by a synchronous belt assembly, and also include a fixing assembly, a tensioning assembly, a sliding frame 12, a compression spring 13, a mounting frame 14, a limiting frame 15, a ball 151, a slide plate 16, a first push plate 17, a second push plate 18 and a driving assembly. The fixing assembly is installed on the fixing frame 6. When the fixing assembly is in operation, the fixing assembly can press and fix the steel pipe. The tensioning assembly is installed on the movable seat 5. When the tensioning assembly is in operation, the tensioning assembly can tighten the sand belt 8. The upper part of the fixing frame 6 slides symmetrically front and back. A sliding frame 12 is connected in a dynamic manner, and a compression spring 13 is connected between the upper part of the front and rear sliding frames 12 and the upper part of the fixed frame 6. A mounting frame 14 is fixedly connected between the lower parts of the front and rear sliding frames 12. A limit frame 15 is symmetrically slidably connected to the mounting frame 14. The lower inner end of the limit frame 15 is arc-shaped and is located below the sanding belt 8. The lower inner ends of the front and rear limit frames 15 are evenly spaced and rotatably connected with balls 151. A slide plate 16 is slidably set between the front and rear sliding frames 12, and a first push plate 1 is fixedly connected to the middle of the bottom of the slide plate 16. 7. A second push plate 18 is symmetrically slidably connected to the bottom of the slide plate 16. The second push plate 18 is located on both sides of the first push plate 17. The second push plates 18 on the front and rear sides are respectively slidably connected to the upper inner ends of the front and rear limit frames 15 on the front and rear sides. A driving component is arranged between the sliding frame 12 and the mounting frame 14. The driving component is used to first drive the limit frame 15 to move below the sanding belt 8 so that the limit frame 15 can adjust the sanding width of the sanding belt 8, and then the first push plate 17 and the second push plate 18 move downward to limit the adjusted sanding belt 8.

[0030] See also Figure 2 As shown, the fixing assembly includes a fixing plate 10, a cylinder 101 and a pressure block 102. The fixing plate 10 is symmetrically fixed to the front and rear of the lower part of the fixing frame 6. The cylinders 101 are installed on the front and rear fixing plates 10. The ends of the telescopic rods of the front and rear cylinders 101 are fixed with pressure blocks 102. The pressure block 102 is located directly above the support frame 2. When the pressure block 102 moves downward and contacts the steel pipe, the pressure block 102 can press and fix the steel pipe.

[0031] See also Figure 2 and Figure 3As shown, the tensioning assembly includes a guide seat 11, a sliding seat 111, a tensioning wheel 112 and a connecting spring 113. The guide seat 11 is fixedly connected to the middle of the bottom of the movable seat 5 symmetrically front and back, and the sliding seat 111 is slidably connected between the guide seats 11 on the front and rear sides. The sliding seat 111 is rotatably connected to the tensioning wheel 112, which is in contact with the sanding belt 8. The tensioning wheel 112 can tighten the sanding belt 8, and a connecting spring 113 is symmetrically connected between the top of the sliding seat 111 and the bottom of the movable seat 5.

[0032] See also Figure 4 As shown, the driving assembly includes a stepper motor 20, a screw rod 201 and a bidirectional screw rod 202. The screw rod 201 is symmetrically connected to the left side of the top of the mounting frame 14 and is threadedly connected to the left side of the slide plate 16. The stepper motor 20 is installed on the lower left side of the inner rear side of the fixing frame 6. The output shaft end of the stepper motor 20 is connected to the upper parts of the bidirectional screw rods 202 on the front and rear sides through a synchronous belt assembly. The bidirectional screw rod 202 is rotatably connected to the upper left side of the mounting frame 14, and the bidirectional screw rod 202 is threadedly connected to the upper left side of the front and rear limit frames 15 on both sides.

[0033] First, place the welded steel pipe between the two support frames 2, and make the welding point of the steel pipe just below the sanding belt 8, then twist the two-way screw rod 202 to rotate forward, and the two-way screw rod 202 drives the front and rear limit frames 15 to move in the direction of approaching each other, and the front and rear limit frames 15 move to adjust the grinding width of the sanding belt 8. At the same time, the limit frames 15 also drive the front and rear second push plates 18 to move in the direction of approaching each other, and the second push plates 18 move synchronously with the limit frames 15. When the limit frames 15 move to the width required for sanding of the sanding belt 8, stop twisting the two-way screw rod 202, and the limit frames 15 stop driving the second push plates 18 to move. At this time, start the electric lifting plate 4 to move downward, and the electric lifting plate 4 moves downward to drive the movable seat 5 to move downward, and the movable seat 5 moves downward to drive The fixed frame 6 moves downward, and the fixed frame 6 drives the sanding belt 8 to move downward through the guide roller 7. At the same time, the fixed frame 6 moves downward and drives the sliding frame 12 to move downward through the compression spring 13. The sliding frame 12 moves downward and drives the mounting frame 14 to move downward. The mounting frame 14 drives the limiting frame 15 to move downward. When the limiting frame 15 moves downward and contacts the outer wall of the steel pipe, the limiting frame 15 stops moving downward. The limiting frame 15 stops the mounting frame 14 from moving downward. The mounting frame 14 stops the sliding frame 12 from moving downward. The fixed frame 6 continues to move downward to compress the compression spring 13. As the sanding belt 8 continues to move downward and contacts the ball 151 on the limiting frame 15, the limiting frame 15 limits the middle position of the lower part of the sanding belt 8. The middle position of the sanding belt 8 stops moving downward, and the fixed frame 6 The sanding belt 8 continues to move downward and is squeezed by the guide roller 7. The middle of the lower part of the sanding belt 8 is arc-shaped. At the same time, the upper part of the sanding belt 8 is tightened to drive the tension wheel 112 to move upward. The tension wheel 112 moves upward to drive the sliding seat 111 to move upward, and the connecting spring 113 is compressed, and the electric lifting plate 4 is closed. Then the stepper motor 20 is started to rotate, and the stepper motor 20 drives the screw 201 to rotate forward through the synchronous belt assembly. The screw 201 rotates forward to drive the slide plate 16 to move downward. The slide plate 16 moves downward to drive the first push plate 17 and the second push plate 18 to move downward. The first push plate 17 and the second push plate 18 move downward and contact the middle of the lower part of the sanding belt 8. Due to the limitation of the sanding belt 8 by the limit frame 15, the first push plate 17 and the second push plate 18 move downward to push the front and rear sides The sanding belt 8 between the limit frames 15 partially moves downward, causing the front and rear sides of the sanding belt 8 to tilt up, and the first push plate 17 and the second push plate 18 push the sanding belt 8 to be close to the welding point of the steel pipe. The stepper motor 20 is turned off, and the screw 201 stops driving the first push plate 17 and the second push plate 18 to move downward through the slide plate 16, and then the cylinder 101 is started. The telescopic rod of the cylinder 101 extends to drive the pressure block 102 to move downward, and the pressure block 102 moves downward and contacts the steel pipe. The pressure block 102 presses the steel pipe tightly, and the cylinder 101 is turned off, and the drive motor 9 can be started. The drive motor 9 drives the upper right guide roller 7 to rotate through the synchronous belt assembly. The upper right guide roller 7 rotates and drives the sanding belt 8 to rotate through the remaining guide rollers 7. The ball 151 on the limit frame 15 guides the sanding belt 8.In order to prevent the continuous friction between the sand belt 8 and the limit frame 15 and cause wear, the sand belt 8 rotates to grind the welds of the steel pipe, making the welds of the steel pipe smoother, so as to prevent the welds from affecting the appearance and overall structural strength of the steel pipe. Since the grinding width of the sand belt 8 has been adjusted, unnecessary grinding of the normal pipe wall area around the welds can be prevented, thereby ensuring the overall quality and structural strength of the steel pipe. When the grinding of the welds of a part of the steel pipe is completed, the drive motor 9 is turned off, the sand belt 8 stops rotating, and the cylinder 101 is started. The extension of the cylinder 101 The shortening of the retracted rod drives the pressing block 102 to move upward and reset, and the pressing block 102 resets and disengages from the steel pipe, and the steel pipe stops being pressed and fixed. The operator can twist the steel pipe to rotate so that the next welding point is located above and contacts the abrasive belt 8, and then start the cylinder 101 to drive the pressing block 102 to move downward and reset to contact the steel pipe. The pressing block 102 continues to press and fix the steel pipe, and the drive motor 9 is started to rotate the abrasive belt 8 to continue to grind the welding point of the steel pipe. This is repeated, and a circle of welding points of the steel pipe can be fully polished. When the grinding of the welding point of the steel pipe is completed After that, the driving motor 9 is turned off, the sanding belt 8 stops rotating, the cylinder 101 is started to drive the pressure block 102 to reset, and then the stepping motor 20 is started to drive the screw 201 to reverse, and the screw 201 reverses and drives the first push plate 17 and the second push plate 18 to move upward and reset through the slide plate 16 to disengage from the sanding belt 8, the sanding belt 8 stops being limited, and the lower middle of the sanding belt 8 rebounds upward and resets to disengage from the steel pipe. At the same time, due to the action of the connecting spring 113, the sliding seat 111 moves downward and resets, driving the tensioning wheel 112 to move downward and reset, and the tensioning wheel 11 2 reset, continue to tighten the sanding belt 8, then start the electric lifting plate 4 to move upward and reset, drive the movable seat 5 to move upward and reset, the movable seat 5 drives the fixed frame 6 to move upward and reset, the fixed frame 6 resets and drives the sanding belt 8 to move upward and reset through the guide roller 7, and at the same time, the fixed frame 6 first resets the compression spring 13, and then the fixed frame 6 drives the sliding frame 12 to move upward and reset through the compression spring 13, and the sliding frame 12 drives the limit frame 15 to move upward and reset through the mounting frame 14, and the steel pipe after the grinding of the weld point can be removed from the support frame 2. When all the weld points of the steel pipe are polished, twist the two-way screw rod 202 to reverse and drive the limit frames 15 on the front and rear sides to move and reset in the direction away from each other, and the limit frames 15 drive the first push plates 17 on the front and rear sides to move and reset in the direction away from each other. In this way, through the action of the limit frame 15, the first push plate 17 and the second push plate 18, the grinding width of the sanding belt 8 can be adjusted according to the width of the weld point, so that weld points of different widths can be accurately polished, thereby improving adaptability. ,

[0034] See also Figure 6As shown, the steel structure welding spot grinding equipment also includes a cleaning component installed between the guide roller 7 and the fixed frame 6, the cleaning component includes a rotating shaft 21, a brush roller 211 and a collecting component, the upper right side of the fixed frame 6 is rotatably connected with the rotating shaft 21, the front side of the rotating shaft 21 and the front side of the guide roller 7 on the upper right side are connected by a synchronous belt component, the middle part of the rotating shaft 21 is fixedly sleeved with a brush roller 211, the brush roller 211 is in contact with the sand belt 8, when the brush roller 211 rotates, the brush roller 211 can remove the debris attached to the sand belt 8, the fixed frame 6 is provided with a collecting component, the collecting component can collect the removed debris; the collecting component includes a dust suction frame 212 and a hose 213, the upper right side of the fixed frame 6 is fixedly connected with the dust suction frame 212, the dust suction frame 212 is located below the brush roller 211, the dust suction frame 212 can collect the removed debris, and the bottom middle of the dust suction frame 212 is connected with a hose 213.

[0035] See also Figure 7 As shown, the steel structure weld spot grinding equipment also includes a rotating component installed on the base 1, and the rotating component includes a fixed frame 22, a cross plate 221, a driving roller 222, a servo motor 223 and a support spring 224. The fixed frame 22 is symmetrically fixed to the middle of the top of the base 1, and a cross plate 221 is slidably connected between the fixed frames 22 on the left and right sides. The driving roller 222 is rotatably connected to the middle of the top of the cross plate 221. When the driving roller 222 rotates, the driving roller 222 can drive the steel pipe to rotate. A servo motor 223 is installed at the bottom of the cross plate 221, and the output shaft of the servo motor 223 is connected to the rear side of the driving roller 222 through a synchronous belt assembly. Support springs 224 are connected between the left and right sides of the bottom of the cross plate 221 and the top of the base 1.

[0036] Initially, the hose 213 is connected to an external vacuum cleaner. When the sanding belt 8 rotates to grind the weld, the upper right guide roller 7 rotates to synchronously drive the shaft 21 to rotate, and the shaft 21 rotates to drive the brush roller 211 to rotate. The brush roller 211 rotates to remove the debris attached to the sanding belt 8 due to grinding. The removed debris falls into the vacuum cleaner frame 212. The external vacuum cleaner is started, and the external vacuum cleaner extracts and collects the debris in the vacuum cleaner frame 212 through the hose 213 to prevent the debris from falling to the surroundings and affecting the working environment. When the sanding belt 8 stops rotating, the upper right guide roller 7 stops driving the shaft 21 to rotate, and the shaft 21 stops driving the brush roller 211 to rotate. In this way, debris attached to the sanding belt 8 can be prevented from affecting the subsequent grinding effect of the weld, thereby improving the subsequent grinding effect of the sanding belt 8.

[0037] When the steel pipe is placed between the front and rear support frames 2, the steel pipe contacts the driving roller 222, and then the front and rear limit frames 15 move downward and contact the steel pipe, the limit frame 15 first pushes the steel pipe to move downward, and the steel pipe moves downward to drive the driving roller 222 to move downward, and the driving roller 222 drives the cross plate 221 to move downward, and the supporting spring 224 is compressed. When the steel pipe is completely in contact with the support frame 2, the steel pipe stops moving downward, and the steel pipe causes the limit frame 15 to move downward. When the steel pipe needs to be rotated so that the next welding point is located at the top to be polished, the cylinder 101 is started to drive the pressing block 102 to loosen the steel pipe, and then the servo motor 223 is started. The servo motor 223 drives the driving roller 222 to rotate through the synchronous belt assembly, and the driving roller 222 drives the steel pipe to rotate. When the next welding point of the steel pipe is at the top, the servo motor 223 is turned off, the driving roller 222 stops driving the steel pipe to rotate, and then the cylinder 101 is started to drive the pressing block 102 to move downward to press the steel pipe, and the welding point of the steel pipe can continue to be polished. When the welding points around the steel pipe are polished, the limit frame 15 moves upward and resets to disengage from the steel pipe, and the cylinder 101 is started to drive the pressing block 102 to loosen the steel pipe. Due to the action of the support spring 224, the horizontal plate 221 moves upward and resets to drive the driving roller 222 to move upward and reset. The driving roller 222 drives the steel pipe to move upward for a distance, and the steel pipe can be removed. In this way, the operator does not need to manually rotate the steel pipe, so it is more convenient to rotate the steel pipe.

[0038] See also Figure 8 As shown, the steel structure weld grinding equipment also includes a contact wheel 23, and the bottom of the first push plate 17 and the bottom of the second push plate 18 are evenly spaced and rotatably connected with the contact wheel 23. When the sanding belt 8 rotates, the contact wheel 23 can reduce the friction between the first push plate 17 and the second push plate 18 and the sanding belt 8.

[0039] When the first push plate 17 and the second push plate 18 move downward, the first push plate 17 and the second push plate 18 drive the contact wheel 23 to move downward, and the contact wheel 23 moves downward to contact the sanding belt 8. The first push plate 17 and the second push plate 18 push the lower middle position of the sanding belt 8 downward to contact the steel pipe through the contact wheel 23. When the sanding belt 8 rotates to grind the welding points of the steel pipe, the rotation of the sanding belt 8 drives the contact wheel 23 to rotate. The contact wheel 23 can prevent excessive friction between the sanding belt 8 and the first push plate 17 and the second push plate 18, thereby ensuring the integrity of the sanding belt 8.

[0040] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A steel structure welding spot grinding device, comprising a base (1) and a support frame (2) symmetrically fixed to the top of the base (1), guide rails (3) are installed at the four corners of the top of the base (1), an electric lifting plate (4) is installed between the guide rails (3), a movable seat (5) is installed on the electric lifting plate (4), a fixed frame (6) is fixed to the movable seat (5), a guide roller (7) is rotatably connected to the fixed frame (6), an abrasive belt (8) is wound between the guide rollers (7), a driving motor (9) is installed at the bottom of the movable seat (5), and the output shaft of the driving motor (9) is connected to the end of one of the guide rollers (7) through a synchronous belt assembly. The invention is characterized in that: The invention also comprises a fixing assembly, a tensioning assembly, a sliding frame (12), a compression spring (13), a mounting frame (14), a limiting frame (15), a ball (151), a slide plate (16), a first push plate (17), a second push plate (18) and a driving assembly, wherein the fixing assembly is mounted on the fixing frame (6) and is used to compress and fix the steel pipe, the tensioning assembly is mounted on the movable seat (5) and is used to tighten the abrasive belt (8), the sliding frame (12) is symmetrically slidably connected to the fixing frame (6), a compression spring (13) is connected between the sliding frame (12) and the fixing frame (6), a mounting frame (14) is fixedly connected between the sliding frame (12), the limiting frame (15) is symmetrically slidably connected to the mounting frame (14), the lower inner end of the limiting frame (15) is arc-shaped and is located in the abrasive belt ( 8), the inner end of the lower part of the limit frame (15) is evenly spaced and rotatably connected with balls (151), a slide plate (16) is slidably mounted between the sliding frames (12), a first push plate (17) is fixedly connected to the bottom of the slide plate (16), and a second push plate (18) located on both sides of the first push plate (17) is symmetrically slidably connected to the bottom of the slide plate (16), and the second push plate (18) is slidably connected to the end of the limit frame (15), and a driving component is arranged between the sliding frame (12) and the mounting frame (14), and the driving component is used to first drive the limit frame (15) to move below the sanding belt (8), so that the limit frame (15) can adjust the sanding width of the sanding belt (8), and then the first push plate (17) and the second push plate (18) move downward to limit the adjusted sanding belt (8).

2. A steel structure welding spot grinding equipment according to claim 1, characterized in that: The fixing assembly comprises a fixing plate (10) symmetrically fixed to the fixing frame (6), a cylinder (101) being mounted on the fixing plate (10), and a pressing block (102) located directly above the supporting frame (2) being fixed to the end of the telescopic rod of the cylinder (101) for pressing and fixing the steel pipe.

3. A steel structure welding spot grinding equipment according to claim 2, characterized in that: The tensioning assembly comprises a guide seat (11) symmetrically fixed to the bottom of the movable seat (5); a sliding seat (111) is slidably connected between the guide seats (11); a tensioning wheel (112) in contact with the sanding belt (8) is rotatably connected to the sliding seat (111) to tighten the sanding belt (8); and a connecting spring (113) is symmetrically connected between the sliding seat (111) and the movable seat (5).

4. A steel structure welding spot grinding equipment according to claim 3, characterized in that: The driving assembly comprises a screw rod (201) symmetrically rotatably connected to the top of the mounting frame (14), the screw rod (201) being threadedly connected to the slide plate (16), a stepper motor (20) being installed inside the fixing frame (6), the output shaft end of the stepper motor (20) being connected to the bidirectional screw rod (202) through a synchronous belt assembly, a bidirectional screw rod (202) being rotatably passed through the mounting frame (14), and the bidirectional screw rod (202) being threadedly connected to the limit frame (15).

5. A steel structure welding spot grinding equipment according to claim 4, characterized in that: The steel structure welding spot grinding equipment also includes a cleaning component, which includes a rotating shaft (21) rotatably connected to a fixed frame (6), the rotating shaft (21) and one of the guide rollers (7) being connected by a synchronous belt component, a brush roller (211) in contact with the sand belt (8) being fixedly mounted on the rotating shaft (21) and used for cleaning debris attached to the sand belt (8), and a collecting component being arranged on the fixed frame (6) for collecting the cleaned debris.

6. A steel structure welding spot grinding device according to claim 5, characterized in that: The collecting assembly comprises a dust collecting frame (212) fixedly connected to the fixing frame (6); the dust collecting frame (212) is located below the brush roller (211) to collect the removed debris; and a hose (213) is connected to the dust collecting frame (212).

7. A steel structure welding spot grinding device according to claim 6, characterized in that: The steel structure welding spot grinding device also includes a rotating assembly, which includes a fixed frame (22) symmetrically fixed to the top of the base (1), a horizontal plate (221) is slidably connected between the fixed frames (22), a driving roller (222) is rotatably connected to the top of the horizontal plate (221) for driving the steel pipe to rotate, a servo motor (223) is installed on the horizontal plate (221), an output shaft of the servo motor (223) and the driving roller (222) are connected to each other via a synchronous belt assembly, and a supporting spring (224) is connected between the horizontal plate (221) and the base (1).

8. The steel structure welding spot grinding equipment according to claim 7, characterized in that: The steel structure welding spot grinding device also includes a contact wheel (23) which is rotatably connected to the bottom of the first push plate (17) and the bottom of the second push plate (18) at even intervals and is used to reduce the friction between the first push plate (17) and the second push plate (18) and the sanding belt (8).

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