Fixed-point grinding device and method for inner wall of steel pipe

Abstract

The invention discloses a fixed-point grinding device and method for the inner wall of a steel pipe, and relates to the technical field of fixed-point grinding. The device comprises a device body, a U-shaped groove is formed in the device body, a limiting frame is arranged at the edge of the right side of the top of the device body, two sliding plates are arranged at the top of the device body and located in the limiting frame, rubber columns are rotationally installed on the left sides of the sliding plates, and an electric sliding rail is arranged on the left side of the device body; a movable frame is slidably mounted in the electric sliding rail, a sliding groove is formed in the right side of the movable frame, and a linear plate is fixedly mounted on the edge of the sliding groove of the movable frame. Different from traditional grinding, a wireless module is arranged in the video recording assembly to transmit a picture obtained after the inner wall of the steel pipe is ground to mobile equipment of a worker, and it is ensured that the worker monitors the grinding scene in real time; workers can conveniently know the smoothness of the inner wall of the steel pipe in time so as to replace the thickness of the grinding wheel in time and adjust the rotating speed of equipment to guarantee the grinding quality.

Description

Technical Field

[0001] The invention relates to the technical field of fixed-point grinding, and in particular to a device and method for fixed-point grinding of the inner wall of a steel pipe. Background Art

[0002] Usually, when processing steel into steel pipes, the raw steel will go through the steps of flattening, rough forming, welding, deburring, fine forming, cutting, etc. In the welding step, there may be hidden dangers of welding defects. When there are welding defects on the steel surface, the surface of the steel pipe is usually polished.

[0003] The patent with the patent announcement number CN215824963U discloses a fixed-point grinding device for the inner wall of a steel pipe, which includes a mobile trolley that moves in a straight line, a motor is provided on the mobile trolley, a grinding shaft is connected to the output end of the motor, a grinding head is provided on the grinding shaft, the grinding head moves in the steel pipe by the movement of the mobile trolley, and an encoder that rotates synchronously with the walking shaft is provided on the walking shaft of the mobile trolley. This patent can accurately locate the part or area of ​​the steel pipe that needs to be ground during grinding, so as to achieve precise grinding.

[0004] However, the device still has some shortcomings: the device can effectively grind the inner wall of the steel pipe, but when polishing the inner wall of the steel pipe for a steel pipe with a smaller diameter, it is difficult for the staff to observe the polishing progress of the inner wall of the steel pipe, resulting in difficulty for the staff to timely understand the smoothness of the inner wall of the steel pipe and thus timely change the thickness of the grinding wheel and the speed of the equipment, which increases the risk of deformation of the steel pipe. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device and method for fixed-point grinding of the inner wall of a steel pipe, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fixed-point grinding device for the inner wall of a steel pipe, comprising a device body, a U-shaped groove is provided inside the device body, and a limit frame is provided at the right edge of the top of the device body, two sliding plates are provided on the top of the device body, and the two sliding plates are both located inside the limit frame, and rubber columns are rotatably installed on the left sides of the sliding plates, an electric slide rail is provided on the left side of the device body, a moving frame is slidably installed inside the electric slide rail, a slide groove is provided on the right side of the moving frame, a straight plate is fixedly installed at the edge of the slide groove of the moving frame, a motor is slidably installed on the left side of the moving frame, and the slide groove of the moving frame rotates inside A reciprocating screw is installed dynamically, the left end of the reciprocating screw passes through and is fixedly installed on the right side of the motor output end, a grinding wheel ring is fixedly installed on the right end of the reciprocating screw, a plurality of mounting grooves are opened on the outer wall of the grinding wheel ring, a circular ring is penetrated and slidably installed on the outer wall of the reciprocating screw, a plurality of arc grooves are opened on the outer wall of the circular ring, a limiting rod is penetrated and slidably installed inside the circular ring, the left side of the limiting rod is fixedly installed on the right side of the mobile frame, a plurality of video recording components are fixedly installed inside the circular arc groove, the lens of the video recording component is provided with a transparent protective cover, and a wireless module is provided inside the video recording component, a magnetic ring is penetrated and slidably installed on the outer wall of the reciprocating screw, and the right side of the magnetic ring is connected to the circular ring The left side is rotatably connected, and a plurality of telescopic brush plates are fixedly installed at the angle adjacent to the outer wall of the magnetic ring and the collecting groove. The telescopic brush plate has a built-in spring, and an arc-shaped piece is fixedly installed on the outer wall plane of the telescopic end of the telescopic brush plate. A push plate is slidably installed on the inner wall of the magnetic ring collecting groove close to the outer wall of the reciprocating screw rod. The steel pipe to be ground is placed between the outer wall surfaces of the two rubber columns, and the steel pipe is supported by the rubber column. After that, the staff adjusts the distance between the two sliding plates. At this time, when the sliding plate approaches away from the center of the device body, the rubber column generates a rotational force through the friction between the steel pipe and starts to rotate in the opposite direction. The rubber column increases the friction between the steel pipe through the rotational force and its own characteristics. The friction increases the stability of the steel pipe, and the sliding plate always slides straight inside the limit frame. The electric slide rail is then started, and the electric slide rail drives the mobile frame to move at a fixed point inside itself. Before the mobile frame moves, the grinding wheel of the required thickness of the steel pipe is installed inside the mounting groove of the outer wall of the grinding wheel ring, and the motor is started. The output end of the motor drives the reciprocating screw to rotate, and the reciprocating screw drives the grinding wheel ring to rotate. The reciprocating screw is adjusted up and down by the linear plate water inlet. At the same time, the circular ring contacts the inner wall of the spiral groove of the reciprocating screw through the centrifugal force of the reciprocating screw rotation and its own built-in card block, and is limited by the limit rod, so the circular ring can slide left and right along the outer wall of the reciprocating screw and drive the camera assembly to move synchronously;When the reciprocating screw rotates, the magnetic ring is not limited by the limiting rod, so the magnetic ring rotates with the reciprocating screw. At the same time, when the circular ring slides to the left along the outer wall of the reciprocating screw, it resists the synchronous movement of the magnetic ring. When the magnetic ring rotates, it drives the telescopic brush plate to rotate. The telescopic brush plate causes its own telescopic end to extend away from the outer wall of the reciprocating screw through the centrifugal force of rotation. At this time, the telescopic brush plate brushes the inner wall of the steel pipe. When the telescopic end of the telescopic brush plate contacts the unpolished part of the inner wall of the steel pipe, it causes the resistance force, and the telescopic end of the telescopic brush plate shrinks toward the outer wall of the reciprocating screw. At this time, the telescopic end of the telescopic brush plate drives the arc piece to move synchronously, and the arc piece pushes the push plate to slide inside the arc groove of the magnetic ring, and so on. ;

[0007] According to the above technical solution, a number of collecting grooves are provided on the outer wall of the magnetic ring, and the magnetic ring is not limited by the limiting rod. The push plate is fixedly connected to the end of the arc piece close to the reciprocating screw away from the side of the reciprocating screw. An anti-loosening device is provided under the reciprocating screw to prevent the steel pipe from shaking due to external interference forces during fixed-point grinding of the steel pipe.

[0008] According to the above technical scheme, the anti-loosening device includes a U-groove plate, a plurality of round rods and a rotating wheel. The left side of the U-groove plate is fixedly installed on the right side of the moving frame, and the bottom of the U-groove plate contacts the top surface of the device body. The front and back sides of the plurality of round rods are slidably installed on the inner wall of the U-groove of the U-groove plate by springs. The rotating wheel is rotatably installed on the outer wall surface of the round rod, and a plurality of grooves are provided on the outer wall of the rotating wheel. An anti-stress device is provided under the U-groove plate to prevent the steel pipe from deforming due to changes in its own stress in the processing area around the device body caused by temperature differences. When the moving frame moves in a sliding direction through the electric slide rail, the U-groove plate is driven to move synchronously, the U-groove plate drives the round rod to move synchronously, and the round rod drives the rotating wheel to move synchronously. When the rotating wheel moves toward the bottom of the steel pipe, it contacts the outer wall of the bottom of the steel pipe and generates friction. The rotating wheel first slides inside the U-groove of the U-groove plate through the round rod, and the spring elastic force causes its own outer wall to always fit the outer wall of the steel pipe. Then the rotating wheel starts to rotate through the friction between the steel pipe and the steel pipe.

[0009] According to the above technical solution, the anti-loosening device also includes a plurality of spring sheets and a trapezoidal plate. The plurality of spring sheets are equidistant and fixedly installed on the surface of the outer wall of the rotating wheel, and the spring sheets are located corresponding to the grooves of the rotating wheel. The trapezoidal plate is fixedly installed on the concave surface of the spring sheets on a plane away from the rotating wheel. When the rotating wheel rotates, the spring sheets are driven to rotate. The arc surface of the spring sheets contacts the outer wall of the steel pipe and is subjected to resistance force and deforms toward the direction close to the rotating wheel until it is flush with the outer wall of the rotating wheel. When the spring sheets no longer resist the outer wall of the steel pipe, they are restored by their own elasticity.

[0010] According to the above technical scheme, the anti-loosening device also includes a sliding block and a resonance plate, the sliding block is slidably installed at the bottom of the inner wall of the rotating wheel groove by a spring on the side of the sliding block away from the spring sheet, a plurality of grooves are opened at the bottom of the sliding block, and the top of the sliding block is located on the inclined movement trajectory of the trapezoidal plate, the resonance plate is fixedly installed on the outer wall surface of the round rod close to the center of the rotating wheel, and the top edge of the resonance plate is located on the movement trajectory of the groove at the bottom of the sliding block, a square groove is opened inside the resonance plate, and a plurality of swing rods are hinged on the top of the inner wall of the square groove by a torsion spring, when the spring sheet is deformed, it drives the trapezoidal plate to resist the sliding block, when the inclined surface of the trapezoidal plate resists the sliding block, the sliding block slides along the bottom of the rotating wheel groove away from the center of the rotating wheel, when the sliding block slides, the groove at its bottom resists the top edge of the resonance plate and bends and deforms, when the sliding block passes the resonance plate, the resonance plate swings back and forth through its own toughness reset process, when the resonance plate swings, it drives the swing rod hinge shaft to start rotating, and at this time the swing rod swings synchronously.

[0011] According to the above technical scheme, the anti-stress device includes a T-shaped disc, two L-shaped plates and a wave plate. The top of the T-shaped disc is fixedly installed on the bottom of the U-groove plate, and the bottoms of the two L-shaped plates are slidably installed on the bottom of the inner wall of the U-shaped groove of the device body through springs, and the arc surface of the L-shaped plate is located on the movement trajectory of the outer wall of the T-shaped disc. The L-shaped plate is provided with a groove on the side close to the device body, and the wave plate is fixedly installed on the vertical surface of the inner wall of the L-shaped plate away from the center of the device body. When the U-groove plate moves to the right, it drives the T-shaped disc to slide synchronously along the bottom of the inner wall of the U-shaped groove of the device body. When the T-shaped disc slides, its own circular surface will resist the arc surface of the L-shaped plate to generate a resistance force. The L-shaped plate slides in the direction away from the center of the device body through the resistance force. When the T-shaped disc slides to the groove of the L-shaped plate, the resistance force disappears and the L-shaped plate is reset by the spring elastic force. This reciprocating process causes the L-shaped plate to slide and reset, and the L-shaped plate drives the wave plate to move synchronously.

[0012] According to the above technical scheme, the anti-stress device also includes a rotating rod and a plurality of activated carbon plates. The right end of the rotating rod is rotatably installed on the right side of the inner wall of the U-shaped groove of the device body, and a spiral groove is provided on the outer wall of the rotating rod. The left side of the rotating rod passes through the vertical surface of the T-shaped disc. The plurality of activated carbon plates are equidistant and fixedly installed on the outer wall surface of the rotating rod, and a square groove is provided on the outer wall of the activated carbon plate. When the T-shaped disc moves, it contacts the outer wall of the rotating rod. At this time, the non-self-locking spiral groove on the outer wall of the rotating rod contacts the built-in block of the T-shaped disc to generate a rotational force and start to rotate. When the rotating rod rotates, it drives the activated carbon plate to rotate.

[0013] According to the above technical scheme, the anti-stress device also includes an elastic sheet and a penetration plate. The elastic sheet is fixedly installed on the vertical surface of the inner wall of the activated carbon plate on the arc surface close to the outer wall of the rotating rod. The penetration plate penetrates and slides on the arc surface of the elastic sheet away from the outer wall of the rotating rod on the side close to the rotating rod. The penetration plate penetrates the inside of the activated carbon plate, and the arc surface of the penetration plate contacts the bottom of the inner wall of the U-shaped groove of the device body. When the activated carbon plate rotates, it drives the elastic sheet and the penetration plate to rotate. When the penetration plate rotates, it contacts the bottom of the inner wall of the U-shaped groove of the device body to generate a resistance force, thereby shrinking toward the inside of the activated carbon plate. When the penetration plate shrinks, it resists the elastic sheet to deform. When the penetration plate no longer resists the bottom of the inner wall of the U-shaped groove of the device body, the elastic force of the elastic sheet pushes the penetration plate to reset, and this process repeats.

[0014] A method for using a fixed-point grinding device for inner wall of a steel pipe comprises the following steps: S1: The steel pipe to be ground is placed between the outer wall surfaces of the two rubber columns. The steel pipe is supported by the rubber columns. Then the staff adjusts the distance between the two sliding plates. When the sliding plates move away from the center of the device body, the rubber columns generate a rotational force through the friction between the rubber columns and the steel pipe and start to rotate in the opposite direction. S2: The rubber column increases the friction between the rubber column and the steel pipe through rotational force and its own characteristics to increase stability. At the same time, the sliding plate always slides in a straight line inside the limit frame. The electric slide rail is then started, and the electric slide rail drives the mobile frame to move at a fixed point inside itself. S3: Before the moving frame moves, a grinding wheel of the required thickness for the steel pipe is installed on the outer wall of the grinding wheel ring, and the grinding wheel is installed inside the mounting groove of the outer wall of the grinding wheel ring. At this time, the motor is started, and the output end of the motor drives the reciprocating screw to rotate, and the reciprocating screw drives the grinding wheel ring to rotate; S4: When the grinding wheel ring rotates, it extends into the steel pipe for rotational grinding, and then the inner wall of the steel pipe is equivalently ground through the fixed-point movement of the electric slide rail to ensure the smoothness of the inner wall of the steel pipe. At the same time, the ring contacts the inner wall of the spiral groove of the reciprocating screw through the centrifugal force of the reciprocating screw and its own built-in block. Therefore, the ring can slide left and right along the outer wall of the reciprocating screw and drive the camera component to move synchronously. The camera component transmits the image of the inner wall of the steel pipe after grinding to the staff's mobile device through the wireless module, ensuring that the staff can monitor the grinding situation in real time.

[0015] The present invention provides a device and method for fixed-point grinding of the inner wall of a steel pipe, which has the following beneficial effects: (1) The present invention cooperates with a movable frame, a linear plate, a reciprocating screw, a grinding wheel ring, a circular ring and a recording component, so that the grinding wheel ring can adapt to the grinding of steel pipes of different lengths, and relies on the fixed-point movement of an electric slide rail to perform equivalent grinding on the inner wall of the steel pipe to ensure the smoothness of the inner wall of the steel pipe, thereby improving practicality; at the same time, different from traditional grinding, the built-in wireless module of the recording component transmits the image of the inner wall of the steel pipe after grinding to the mobile device of the staff, ensuring that the staff can monitor the grinding scene in real time, and it is convenient for the staff to timely understand the smoothness of the inner wall of the steel pipe so as to timely change the thickness of the grinding wheel and adjust the equipment speed to ensure the grinding quality; through the cooperation of a magnetic ring, a telescopic brush plate, an arc sheet and a push plate, the telescopic brush plate is adapted to scrape off the steel debris still attached to the inner wall of steel pipes of different diameters after grinding, and the magnetic ring reciprocates to absorb and accept the fallen steel debris over a large range, and at the same time relies on the push plate to push the steel debris to slide inside the arc groove to avoid accumulation in the center and reduce the volume of the arc groove.

[0016] (2) The present invention, through the setting of the anti-loosening device, cooperates with the moving frame, U-groove plate, round rod and rotating wheel, converts the force that ensures the stable parallelism of the steel pipe during the grinding movement of the reciprocating screw from sliding friction to rolling friction, and ensures that the steel pipe can be stable and not shaken when disturbed by external forces through the rubber column and the rotating wheel, and ensures that the steel pipe can always be in a straight line from left to right to avoid deviation, thereby preventing local grinding from being too thin; through the cooperation of the spring piece, trapezoidal plate, sliding block and resonance plate, the grinding wheel ring is prompted to move at a fixed point to grind the inner wall of the steel pipe. During the operation of the equipment and the vibration of external force interference, the vibration is offset by the reverse interference force generated by the resonance plate and the swing of the swing rod, thereby reducing the overall operation fluctuation of the equipment and further preventing the steel pipe from being slightly offset.

[0017] (3) The present invention sets an anti-stress device, and cooperates with a U-groove plate, a T-shaped disc, an L-shaped plate and a wave plate to achieve sliding shielding of sparks splashed by weld leaks or damaged parts of the steel pipe when the inner wall of the steel pipe is ground. At the same time, the wave plate continuously slides through its own wave surface to accelerate the air circulation rate in the processing area of ​​the device body, thereby avoiding the possibility of heat accumulation causing the local temperature of the steel pipe to be uneven, changing the stress and increasing the deformation of the steel pipe; through the cooperation of the rotating rod, the activated carbon plate, the elastic sheet and the through plate, the activated carbon plate is prompted to rotate and absorb and purify the harmful gas generated by the spark smoke generated by the grinding within the processing range, and the elastic sheet reciprocates and deforms to fan the circulation speed of the harmful gas within the rotation range of the activated carbon plate, thereby accelerating the contact rate between the two within the same time, prompting the activated carbon plate to evenly absorb the harmful gas and improve the purification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a left side perspective schematic diagram of the present invention as a whole; Figure 3 It is a schematic diagram of the peripheral structure of the reciprocating screw rod of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 It is a schematic diagram of the anti-loosening device of the present invention; Figure 6 It is an enlarged schematic diagram of part of the structure of the anti-loosening device of the present invention; Figure 7 It is a schematic diagram of the stress prevention device of the present invention; Figure 8 This is a schematic diagram of the anti-stress device of the present invention from a top perspective; Fig. 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B in the middle.

[0019] In the figure: 1. device body; 2. sliding plate; 21. rubber column; 3. electric slide rail; 4. anti-loosening device; 41. U-slot plate; 42. round rod; 43. rotating wheel; 44. spring piece; 45. trapezoidal plate; 46. sliding block; 47. resonance plate; 5. anti-stress device; 51. T-shaped disc; 52. L-shaped plate; 53. wave plate; 54. rotating rod; 55. activated carbon plate; 56. elastic sheet; 57. through plate; 6. moving frame; 7. linear plate; 8. reciprocating screw rod; 9. grinding wheel ring; 10. circular ring; 11. recording component; 12. magnetic ring; 13. telescopic brush plate; 14. arc sheet; 15. push plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figure 1-Figure 9One embodiment of the present invention is: a fixed-point grinding device for the inner wall of a steel pipe, comprising a device body 1, a U-shaped groove is provided inside the device body 1, and a limit frame is provided at the right edge of the top of the device body 1, two sliding plates 2 are provided on the top of the device body 1, and the two sliding plates 2 are both located inside the limit frame, and rubber columns 21 are rotatably installed on the left side of the sliding plates 2, an electric slide rail 3 is provided on the left side of the device body 1, and a moving frame 6 is slidably installed inside the electric slide rail 3, a slide groove is provided on the right side of the moving frame 6, a straight plate 7 is fixedly installed at the edge of the slide groove of the moving frame 6, a motor is slidably installed on the left side of the moving frame 6, and the inside of the slide groove of the moving frame 6 A reciprocating screw 8 is rotatably installed, the left end of the reciprocating screw 8 passes through and is fixedly installed on the right side of the motor output end, a grinding wheel ring 9 is fixedly installed on the right end of the reciprocating screw 8, and a plurality of mounting grooves are provided on the outer wall of the grinding wheel ring 9, a circular ring 10 is penetrated and slidably installed on the outer wall of the reciprocating screw 8, a plurality of arc grooves are provided on the outer wall of the circular ring 10, a limiting rod is penetrated and slidably installed inside the circular ring 10, the left side of the limiting rod is fixedly installed on the right side of the mobile frame 6, a plurality of video recording components 11 are fixedly installed inside the arc groove of the circular ring 10, the lens of the video recording component 11 is provided with a transparent protective cover, and a wireless module is provided inside the video recording component 11, the outer wall of the reciprocating screw 8 passes through and is slidably installed A magnetic ring 12 is installed, and the right side of the magnetic ring 12 is rotatably connected to the left side of the circular ring 10. A plurality of telescopic brush plates 13 are fixedly installed at the angle between the outer wall of the magnetic ring 12 and the collecting groove. The telescopic brush plates 13 are equipped with springs. An arc-shaped piece 14 is fixedly installed on the outer wall plane of the telescopic end of the telescopic brush plate 13. A push plate 15 is slidably installed on the inner wall of the collecting groove of the magnetic ring 12 near the outer wall of the reciprocating screw rod 8. Through the above cooperation, the grinding wheel ring 9 can adapt to the grinding of steel pipes of different lengths, and the fixed-point movement of the electric slide rail 3 is used to perform equivalent grinding on the inner wall of the steel pipe to ensure the smoothness of the inner wall of the steel pipe and improve practicality. At the same time, it is different from traditional grinding by taking a camera. The recording component 11 has a built-in wireless module which transmits the image of the inner wall of the steel pipe after grinding to the staff's mobile device, ensuring that the staff can monitor the grinding situation in real time, making it convenient for the staff to timely understand the smoothness of the inner wall of the steel pipe so as to timely change the coarseness of the grinding wheel and adjust the equipment speed to ensure the grinding quality; through the above cooperation, the telescopic brush plate 13 is prompted to adaptively scrape off the steel debris still adhered to the inner wall of steel pipes of different diameters after grinding, and the magnetic ring 12 reciprocates to absorb and accept the fallen steel debris on a large scale, and at the same time relies on the push plate 15 to push the steel debris to slide inside the arc groove to avoid accumulation in the center and reduce the volume of the arc groove.

[0022] A plurality of collecting grooves are provided on the outer wall of the magnetic ring 12, and the magnetic ring 12 is not limited by the limiting rod. The push plate 15 is fixedly connected to the end of the arc piece 14 close to the reciprocating screw 8 away from the side of the reciprocating screw 8. An anti-loosening device 4 is provided below the reciprocating screw 8 to prevent the steel pipe from shaking due to external interference forces during fixed-point grinding of the steel pipe.

[0023] When in use, the steel pipe that needs to be ground is placed between the outer wall surfaces of the two rubber columns 21, and the steel pipe is supported by the rubber columns 21. Then the staff adjusts the distance between the two sliding plates 2. At this time, when the sliding plate 2 moves away from the center of the device body 1, the rubber column 21 generates a rotational force through the friction between the rubber column 21 and the steel pipe and starts to rotate in the opposite direction. The rubber column 21 increases the friction between the rubber column 21 and the steel pipe through the rotational force and its own characteristics to increase the stability of the steel pipe. At the same time, the sliding plate 2 always slides in a straight line inside the limit frame, and then the electric slide rail 3 is started. The electric slide rail 3 drives the mobile frame 6 to move at a fixed point inside itself. Before the mobile frame 6 moves, the grinding wheel of the required thickness for the steel pipe is installed on the outer wall of the grinding wheel ring 9. Inside the groove, start the motor, the motor output end drives the reciprocating screw 8 to rotate, the reciprocating screw 8 drives the grinding wheel ring 9 to rotate, the reciprocating screw 8 is adjusted up and down by the linear plate 7 water inlet line, and the ring 10 contacts the inner wall of the spiral groove of the reciprocating screw 8 through the centrifugal force of the reciprocating screw 8 rotation and its own built-in block, and is limited by the limit rod, so the ring 10 can slide left and right along the outer wall of the reciprocating screw 8 and drive the recording component 11 to move synchronously, through the above cooperation, the grinding wheel ring 9 can adapt to the grinding of steel pipes of different lengths, and rely on the fixed-point movement of the electric slide rail 3 to perform equivalent grinding on the inner wall of the steel pipe to ensure the smoothness of the inner wall of the steel pipe and improve practicality; at the same time, it is different from traditional grinding through the recording group The built-in wireless module of component 11 transmits the image of the inner wall of the steel pipe after grinding to the mobile device of the staff, ensuring that the staff can monitor the grinding situation in real time, and it is convenient for the staff to timely understand the smoothness of the inner wall of the steel pipe so as to timely change the thickness of the grinding wheel and adjust the equipment speed to ensure the grinding quality; when the reciprocating screw 8 rotates, since the magnetic ring 12 is not limited by the limiting rod, the magnetic ring 12 rotates with the reciprocating screw 8, and at the same time, when the ring 10 slides to the left along the outer wall of the reciprocating screw 8, it resists the synchronous movement of the magnetic ring 12, and the rotation of the magnetic ring 12 drives the telescopic brush plate 13 to rotate, and the telescopic brush plate 13 causes its own telescopic end to extend away from the outer wall of the reciprocating screw 8 through the rotating centrifugal force. The inner wall of the steel pipe is brushed, and when the telescopic end of the telescopic brush plate 13 contacts the inner wall of the steel pipe that has not been polished flat, a resistance force is generated, and the telescopic end of the telescopic brush plate 13 shrinks toward the outer wall of the reciprocating screw 8. At this time, the telescopic end of the telescopic brush plate 13 drives the arc piece 14 to move synchronously, and the arc piece 14 pushes the push plate 15 to slide inside the arc groove of the magnetic ring 12, and repeats this process. Through the above cooperation, the telescopic brush plate 13 is enabled to adaptively scrape off the steel debris still adhered to the inner wall of steel pipes of different diameters after polishing, and the magnetic ring 12 reciprocates to absorb and accept the fallen steel debris on a large scale, and at the same time relies on the push plate 15 to push the steel debris to slide inside the arc groove to avoid accumulation in the center and reduce the volume of the arc groove.

[0024] See also Figure 1-Figure 9 , based on the above embodiment, another embodiment of the present invention further includes an anti-loosening device 4; The anti-loosening device 4 includes a U-groove plate 41, a plurality of round rods 42 and a rotating wheel 43. The left side of the U-groove plate 41 is fixedly installed on the right side of the mobile frame 6, and the bottom of the U-groove plate 41 contacts the top surface of the device body 1. The front and back sides of the plurality of round rods 42 are slidably installed on the inner wall of the U-groove of the U-groove plate 41 through springs. The rotating wheel 43 is internally rotatably installed on the outer wall surface of the round rod 42, and the outer wall of the rotating wheel 43 is provided with a plurality of grooves. An anti-stress device 5 is provided below the U-groove plate 41 to prevent the stress of the steel pipe itself from changing due to the temperature difference in the processing area around the device body 1, resulting in deformation of the steel pipe itself. Through the above cooperation, the force that ensures the stable parallelism of the steel pipe during the grinding movement of the reciprocating screw 8 is converted from sliding friction to rolling friction. The rubber column 21 and the rotating wheel 43 ensure that the steel pipe can be stable and not shaken when disturbed by external force, while ensuring that the steel pipe can always be in a straight line from left to right to avoid deviation, thereby preventing local grinding from being too thin.

[0025] The anti-loosening device 4 also includes a plurality of spring sheets 44 and a trapezoidal plate 45. The plurality of spring sheets 44 are equidistantly and fixedly mounted on the outer wall surface of the rotating wheel 43, and the spring sheets 44 are located corresponding to the grooves of the rotating wheel 43. The trapezoidal plate 45 is fixedly mounted on the concave surface of the spring sheets 44 on a plane away from the rotating wheel 43.

[0026] The anti-loosening device 4 also includes a sliding block 46 and a resonance plate 47. The sliding block 46 is slidably installed on the bottom of the inner wall of the groove of the rotating wheel 43 away from the spring sheet 44 through a spring. A plurality of grooves are provided at the bottom of the sliding block 46, and the top of the sliding block 46 is located on the inclined motion trajectory of the trapezoidal plate 45. The resonance plate 47 is fixedly installed on the outer wall surface of the round rod 42 near the center of the rotating wheel 43, and the top edge of the resonance plate 47 is located on the motion trajectory of the groove at the bottom of the sliding block 46. A square groove is provided inside the resonance plate 47, and a plurality of swing rods are hinged on the top of the inner wall of the square groove through a torsion spring. In the process of the grinding wheel ring 9 being moved at a fixed point to grind the inner wall of the steel pipe through the above cooperation, the vibration during the operation of the equipment and the vibration caused by external force interference are offset by the reverse interference force generated by the swing of the resonance plate 47 and the swing rod, thereby reducing the overall operation fluctuation of the equipment and further preventing the steel pipe from being slightly offset.

[0027] When in use, the moving frame 6 drives the U-groove plate 41 to move synchronously through the electric slide rail 3 when there is sliding movement, the U-groove plate 41 drives the round rod 42 to move synchronously, and the round rod 42 drives the rotating wheel 43 to move synchronously. When the rotating wheel 43 moves toward the bottom of the steel pipe, it contacts the outer wall of the bottom of the steel pipe and generates friction. The rotating wheel 43 first slides inside the U-groove of the U-groove plate 41 through the round rod 42, and the spring elastic force causes its own outer wall to always fit the outer wall of the steel pipe. Then, the rotating wheel 43 starts to rotate through the friction between the steel pipe and the rotating wheel. Through the above cooperation, the force that ensures the stable parallelism of the steel pipe during the grinding movement of the reciprocating screw rod 8 is converted from sliding friction to rolling friction. The rubber column 21 and the rotating wheel 43 ensure that the steel pipe can be stable and not shaken when disturbed by external forces, and at the same time ensure that the steel pipe can always be in a straight line from left to right to avoid deviation, so as to prevent local grinding from being too thin; when the rotating wheel 43 rotates, it drives the spring piece 44 to rotate, and the arc surface of the spring piece 44 contacts the outer wall of the steel pipe and is subjected to resistance to move closer to the rotating wheel. 43 direction until it is flush with the outer wall of the rotating wheel 43. When the spring piece 44 no longer contacts the outer wall of the steel pipe, it is reset by its own elasticity. When the spring piece 44 is deformed, it drives the trapezoidal plate 45 to contact the sliding block 46. When the inclined surface of the trapezoidal plate 45 contacts the sliding block 46, the sliding block 46 slides along the bottom of the groove of the rotating wheel 43 toward the direction away from the center of the rotating wheel 43. When the sliding block 46 slides, the groove at the bottom of itself contacts the top edge of the resonance plate 47 and bends and deforms. After the sliding block 46 passes the resonance plate 47, the resonance plate 47 swings back and forth during the reset process of its own toughness. When the resonance plate 47 swings, it drives the swing rod hinge shaft to start rotating. At this time, the swing rod swings synchronously. Through the above cooperation, the grinding wheel ring 9 is moved at a fixed point to grind the inner wall of the steel pipe. The vibration during the operation of the equipment and the vibration caused by external force interference are offset by the reverse interference force generated by the swing of the resonance plate 47 and the swing rod, thereby reducing the overall operation fluctuation of the equipment and further preventing the steel pipe from slightly deviating.

[0028] See also Figure 1-Figure 9 , based on the above embodiment, another embodiment of the present invention further includes an anti-stress device 5; The anti-stress device 5 includes a T-shaped disc 51, two L-shaped plates 52 and a wave plate 53. The top of the T-shaped disc 51 is fixedly installed on the bottom of the U-groove plate 41. The bottoms of the two L-shaped plates 52 are slidably installed on the bottom of the inner wall of the U-shaped groove of the device body 1 through springs, and the arc surface of the L-shaped plate 52 is located on the movement trajectory of the outer wall of the T-shaped disc 51. The L-shaped plate 52 is provided with a groove on the side close to the device body 1, and the wave plate 53 is fixedly installed on the vertical surface of the inner wall of the L-shaped plate 52 away from the center of the device body 1. Through the above cooperation, sparks splashed by weld leaks or damaged parts of the steel pipe when the inner wall of the steel pipe is ground are slidably shielded. At the same time, the wave plate 53 continuously slides through its own wave surface to accelerate the air circulation rate in the processing area of ​​the device body 1, avoiding the possibility of heat accumulation causing the local temperature of the steel pipe to be uneven, changing the stress and increasing the deformation of the steel pipe.

[0029] The anti-stress device 5 also includes a rotating rod 54 and a plurality of activated carbon plates 55. The right end of the rotating rod 54 is rotatably installed on the right side of the inner wall of the U-shaped groove of the device body 1, and a spiral groove is opened on the outer wall of the rotating rod 54. The left side of the rotating rod 54 passes through the vertical surface of the T-shaped disc 51. A plurality of activated carbon plates 55 are equidistant and fixedly installed on the outer wall surface of the rotating rod 54, and a square groove is opened on the outer wall of the activated carbon plate 55.

[0030] The anti-stress device 5 also includes an elastic sheet 56 and a penetration plate 57. The elastic sheet 56 is fixedly installed on the vertical surface of the inner wall of the activated carbon plate 55 on the curved surface on the side close to the outer wall of the rotating rod 54. The penetration plate 57 is penetrated and slidably installed on the curved surface of the elastic sheet 56 on the side close to the rotating rod 54 away from the outer wall of the rotating rod 54. The penetration plate 57 penetrates the inside of the activated carbon plate 55, and the curved surface of the penetration plate 57 contacts the bottom of the inner wall of the U-shaped groove of the device body 1. Through the above cooperation, the activated carbon plate 55 is prompted to rotate and absorb and purify the harmful gas generated by the spark smoke generated by grinding within the processing range, and the elastic sheet 56 reciprocates and deforms to fan the circulation speed of the harmful gas within the rotating range of the activated carbon plate 55, thereby accelerating the contact rate between the two within the same time, prompting the activated carbon plate 55 to evenly absorb the harmful gas and improve the purification efficiency.

[0031] When in use, when the U-groove plate 41 moves to the right, it drives the T-shaped disc 51 to slide synchronously along the bottom of the inner wall of the U-groove of the device body 1. When the T-shaped disc 51 slides, its own circular surface will resist the arc surface of the L-shaped plate 52 to generate a resistance force. The L-shaped plate 52 slides away from the center of the device body 1 through the resistance force. When the T-shaped disc 51 slides to the groove of the L-shaped plate 52, the resistance force disappears. The L-shaped plate 52 is reset by the spring force. This reciprocating process causes the L-shaped plate 52 to slide and reset. The L-shaped plate 52 drives the wave plate 53 to move synchronously. Through the above cooperation, the sparks splashed by the weld leakage or damaged part of the steel pipe during the grinding of the inner wall of the steel pipe can be slid and shielded. At the same time, the wave plate 53 continuously slides through its own wave surface to accelerate the air circulation rate in the processing area of ​​the device body 1, avoiding the possibility of heat accumulation causing the local temperature of the steel pipe to be different, changing the stress and increasing the deformation of the steel pipe; when the T-shaped disc 51 moves, it contacts the outer wall of the rotating rod 54. At this time, the outer wall of the rotating rod 54 is not The self-locking spiral groove contacts the built-in block of the T-shaped disc 51 to generate a rotating force and start to rotate. When the rotating rod 54 rotates, it drives the activated carbon plate 55 to rotate. When the activated carbon plate 55 rotates, it drives the elastic sheet 56 and the through plate 57 to rotate. When the through plate 57 rotates, it contacts the bottom of the inner wall of the U-shaped groove of the device body 1 to generate a resistance force, thereby shrinking toward the inside of the activated carbon plate 55. When the through plate 57 shrinks, it resists the elastic sheet 56 and deforms. When the through plate 57 no longer resists the bottom of the inner wall of the U-shaped groove of the device body 1, the elastic force of the elastic sheet 56 pushes the through plate 57 to reset, and so on. Through the above cooperation, the activated carbon plate 55 is prompted to rotate and absorb and purify the harmful gas generated by the spark smoke generated by grinding within the processing range, and the elastic sheet 56 reciprocates and deforms and fans the circulation speed of the harmful gas within the rotation range of the activated carbon plate 55, thereby accelerating the contact rate between the two within the same time, prompting the activated carbon plate 55 to evenly absorb the harmful gas and improve the purification efficiency.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fixed-point grinding device for the inner wall of a steel pipe, comprising a device body (1), a U-shaped groove is provided inside the device body (1), and a limit frame is provided at the right edge of the top of the device body (1), two sliding plates (2) are provided on the top of the device body (1), and the two sliding plates (2) are both located inside the limit frame, and rubber columns (21) are rotatably installed on the left side of the sliding plates (2), and an electric slide rail (3) is provided on the left side of the device body (1), characterized in that: A moving frame (6) is slidably mounted inside the electric slide rail (3), a slide groove is provided on the right side of the moving frame (6), a straight plate (7) is fixedly mounted on the edge of the slide groove of the moving frame (6), a motor is slidably mounted on the left side of the moving frame (6), a reciprocating screw rod (8) is rotatably mounted inside the slide groove of the moving frame (6), the left end of the reciprocating screw rod (8) passes through and is fixedly mounted on the right side of the motor output end, a grinding wheel ring (9) is fixedly mounted on the right end of the reciprocating screw rod (8), a plurality of mounting grooves are provided on the outer wall of the grinding wheel ring (9), a circular ring (10) is penetrated through and slidably mounted on the outer wall of the reciprocating screw rod (8), a plurality of arc grooves are provided on the outer wall of the circular ring (10), a limit rod is penetrated through and slidably mounted inside the circular ring (10), and the left side of the limit rod is fixedly mounted The invention is mounted on the right side of the mobile frame (6). A plurality of video recording components (11) are fixedly mounted inside the arc groove of the circular ring (10). The lens of the video recording component (11) is provided with a transparent protective cover, and a wireless module is provided inside the video recording component (11). A magnetic ring (12) is penetrated through the outer wall of the reciprocating screw rod (8) and is slidably mounted thereon. The right side of the magnetic ring (12) is rotatably connected to the left side of the circular ring (10). A plurality of telescopic brush plates (13) are fixedly mounted at the angle between the outer wall of the magnetic ring (12) and the collecting groove. The telescopic brush plates (13) are provided with springs. An arc-shaped sheet (14) is fixedly mounted on the plane of the outer wall of the telescopic end of the telescopic brush plate (13). A push plate (15) is slidably mounted on the inner wall of the collecting groove of the magnetic ring (12) close to the outer wall of the reciprocating screw rod (8).

2. A fixed-point grinding device for inner wall of a steel pipe according to claim 1, characterized in that: The outer wall of the magnetic ring (12) is provided with a plurality of collecting grooves, and the magnetic ring (12) is not limited by the limiting rod. The push plate (15) is fixedly connected to the end of the arc-shaped piece (14) close to the reciprocating screw (8) at the side away from the reciprocating screw (8). An anti-loosening device (4) is provided below the reciprocating screw (8) to prevent the steel pipe from shaking due to the influence of external interference forces when the steel pipe is fixed-point ground.

3. A fixed-point grinding device for inner wall of a steel pipe according to claim 2, characterized in that: The anti-loosening device (4) comprises a U-groove plate (41), a plurality of round rods (42) and a rotating wheel (43); the left side of the U-groove plate (41) is fixedly mounted on the right side of the moving frame (6), and the bottom of the U-groove plate (41) contacts the top surface of the device body (1); the front and back sides of the plurality of round rods (42) are slidably mounted on the inner wall of the U-groove of the U-groove plate (41) through springs; the rotating wheel (43) is rotatably mounted on the outer wall surface of the round rods (42), and the outer wall of the rotating wheel (43) is provided with a plurality of grooves; and an anti-stress device (5) is provided below the U-groove plate (41) for preventing the stress of the steel pipe from changing due to temperature difference in the processing area around the device body (1), thereby preventing the steel pipe from deforming due to changes in its own stress.

4. A fixed-point grinding device for inner wall of a steel pipe according to claim 3, characterized in that: The anti-loosening device (4) further comprises a plurality of spring sheets (44) and a trapezoidal plate (45), wherein the plurality of spring sheets (44) are equidistantly and fixedly mounted on the outer wall surface of the rotating wheel (43), and the spring sheets (44) are located corresponding to the grooves of the rotating wheel (43), and the trapezoidal plate (45) is fixedly mounted on the concave surface of the spring sheets (44) on a plane away from the rotating wheel (43).

5. A fixed-point grinding device for inner wall of a steel pipe according to claim 4, characterized in that: The anti-loosening device (4) further comprises a sliding block (46) and a resonance plate (47); the sliding block (46) is slidably mounted on the bottom of the inner wall of the groove of the rotating wheel (43) on the side away from the spring sheet (44) via a spring; a plurality of grooves are formed at the bottom of the sliding block (46); the top of the sliding block (46) is located on the inclined motion track of the trapezoidal plate (45); the resonance plate (47) is fixedly mounted on the outer wall surface of the round rod (42) on the side close to the center of the rotating wheel (43); the top edge of the resonance plate (47) is located on the motion track of the groove at the bottom of the sliding block (46); a square groove is formed inside the resonance plate (47); and a plurality of swinging rods are hinged to the top of the inner wall of the square groove via a torsion spring.

6. A fixed-point grinding device for inner wall of a steel pipe according to claim 5, characterized in that: The stress prevention device (5) comprises a T-shaped disc (51), two L-shaped plates (52) and a wave plate (53); the top of the T-shaped disc (51) is fixedly mounted on the bottom of the U-groove plate (41); the bottoms of the two L-shaped plates (52) are slidably mounted on the bottom of the inner wall of the U-groove of the device body (1) via springs; and the arc surface of the L-shaped plate (52) is located on the movement trajectory of the outer wall of the T-shaped disc (51); a groove is provided on the side of the L-shaped plate (52) close to the device body (1); and the wave plate (53) is fixedly mounted on the vertical surface of the inner wall of the L-shaped plate (52) on the side away from the center of the device body (1).

7. A fixed-point grinding device for inner wall of a steel pipe according to claim 6, characterized in that: The stress prevention device (5) further comprises a rotating rod (54) and a plurality of activated carbon plates (55), wherein the right end of the rotating rod (54) is rotatably mounted on the right side of the inner wall of the U-shaped groove of the device body (1), and the outer wall of the rotating rod (54) is provided with a spiral groove, and the left side of the rotating rod (54) passes through the inside of the vertical surface of the T-shaped disc (51), and the plurality of activated carbon plates (55) are equidistantly and fixedly mounted on the outer wall surface of the rotating rod (54), and the outer wall of the activated carbon plates (55) is provided with a square groove.

8. A fixed-point grinding device for inner wall of a steel pipe according to claim 7, characterized in that: The stress prevention device (5) further comprises an elastic sheet (56) and a penetration plate (57); the elastic sheet (56) is fixedly mounted on the vertical surface of the inner wall of the activated carbon plate (55) on the curved surface on the side close to the outer wall of the rotating rod (54); the penetration plate (57) is penetrated and slidably mounted on the curved surface on the side close to the rotating rod (54) of the elastic sheet (56) away from the outer wall of the rotating rod (54); the penetration plate (57) penetrates the interior of the activated carbon plate (55), and the curved surface of the penetration plate (57) contacts the bottom of the inner wall of the U-shaped groove of the device body (1).

9. A method for using a fixed-point grinding device for inner wall of a steel pipe according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The steel pipe to be repaired is placed between the outer wall surfaces of the two rubber columns (21), and the steel pipe is supported by the rubber columns (21). Then, the staff adjusts the distance between the two sliding plates (2). At this time, when the sliding plates (2) move away from the center of the device body (1), the rubber columns (21) generate a rotational force through the friction between the rubber columns and the steel pipe and start to rotate in the opposite direction; S2: The rubber column (21) increases the friction between the rubber column (21) and the steel pipe through rotational force and its own characteristics to increase stability. At the same time, the sliding plate (2) always slides linearly inside the limit frame. The electric slide rail (3) is then started, and the electric slide rail (3) drives the moving frame (6) to move at a fixed point inside itself. S3: Before the moving frame (6) moves, a grinding wheel of a required thickness for the steel pipe is installed on the outer wall of the grinding wheel ring (9), and the grinding wheel is installed inside the mounting groove of the outer wall of the grinding wheel ring (9). At this time, the motor is started, and the output end of the motor drives the reciprocating screw (8) to rotate, and the reciprocating screw (8) drives the grinding wheel ring (9) to rotate; S4: When the grinding wheel ring (9) rotates, it extends into the interior of the steel pipe for rotational grinding, and then the inner wall of the steel pipe is equivalently ground by the fixed-point movement of the electric slide rail (3) to ensure the smoothness of the inner wall of the steel pipe. At the same time, the ring (10) contacts the inner wall of the spiral groove of the reciprocating screw (8) through the centrifugal force of the rotation of the reciprocating screw (8) and its own built-in block. Therefore, the ring (10) can slide left and right along the outer wall of the reciprocating screw (8) and drive the camera assembly (11) to move synchronously. The camera assembly (11) transmits the image of the inner wall of the steel pipe after grinding to the mobile device of the staff through the wireless module, ensuring that the staff can monitor the grinding scene in real time.

Images