A device for polishing the inner wall of a steel pipe

Abstract

This invention belongs to the field of steel pipe grinding technology, and specifically relates to a steel pipe inner wall grinding device, comprising a U-shaped frame and a rotating cylinder. Two symmetrically distributed rollers are fixedly connected to the bottom ends of both sides of the U-shaped frame. An installation hole is formed on the top surface of the U-shaped frame, and a first electric push rod is fixedly connected to the wall of the installation hole. This invention enables the steel pipe inner wall grinding device to automatically and efficiently grind and clean the inner wall of steel pipes. Furthermore, the grinding device is not affected by the length of the steel pipe. The device is also compact, effectively improving the ease of use and the reliability and efficiency of steel pipe inner wall grinding, while reducing the labor intensity of workers. In addition, the device also has the function of inspecting and repairing uneven thickness of the inner wall of the steel pipe, thereby effectively improving the quality of the steel pipes leaving the factory and ensuring the strength stability, performance, and lifespan of the steel pipes in use.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe grinding technology, and in particular relates to a steel pipe inner wall grinding device. Background Technology

[0002] Steel pipes are hollow, long tubes made from steel through specific processes. They are widely used in fluid transportation, structural support, and other fields. When the inner wall of a steel pipe comes into contact with air, oxygen and iron react to form rust, and the pipe also reacts with moisture in the environment to form an electrolyte solution, accelerating electrochemical corrosion. Based on the above oxidation, the inner wall of the steel pipe needs to be ground before leaving the factory. It is necessary to spray a corrosion-resistant layer after grinding. Grinding can remove the loose oxide layer on the inner wall of the steel pipe, making the surface of the steel pipe smoother, reducing the risk of corrosion, reducing fluid transportation resistance, improving transportation efficiency, and providing a good foundation for subsequent anti-corrosion coating and other treatments, thereby enhancing the overall performance and service life of the steel pipe. For example, the authorization announcement number CN214264939U discloses a steel pipe inner wall grinding device.

[0003] Currently, due to the length limitations of long steel pipes produced by steel mills, existing steel pipe inner wall grinding devices are unable to reliably penetrate deep into the steel pipe for comprehensive and effective grinding. Therefore, workers need to fix the grinding tools on a long rod and then manually insert the grinding tools into the long steel pipe to perform manual grinding operations on the inner wall of the long steel pipe. However, since it is impossible to clearly observe the specific condition of the inner wall of the steel pipe, the grinding process is prone to omissions. Moreover, manual operation is time-consuming and labor-intensive, which not only reduces the reliability and efficiency of steel pipe inner wall grinding but also increases the labor intensity of workers.

[0004] In addition, during the production of long steel pipes, due to deviations in the production process and the influence of environmental factors, uneven thickness may easily occur on the inner wall. However, the existing grinding equipment cannot effectively solve this problem, resulting in quality defects in the long steel pipes leaving the factory, which affects the strength stability, performance and lifespan of the long steel pipes.

[0005] We propose a steel pipe inner wall grinding device to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a steel pipe inner wall grinding device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a steel pipe inner wall grinding device, comprising a U-shaped frame and a rotating cylinder, wherein two symmetrically distributed rollers are fixedly connected to the bottom ends of both sides of the U-shaped frame, an installation hole is provided on the top surface of the U-shaped frame, and a first electric push rod is fixedly connected to the wall of the installation hole, an arc-shaped positioning block is fixedly connected to the moving end of the first electric push rod, and a control mechanism is fixedly connected to the top surface of the U-shaped frame;

[0008] A rotating mechanism is fixedly connected to the side end of the rotating cylinder, and a traveling mechanism is fixedly connected to the side end of the rotating mechanism.

[0009] A connecting ring is sleeved on the outer wall of the rotating cylinder near the rotating mechanism. The outer wall of the connecting ring has two threaded holes, and the hole walls of the threaded holes are threaded with bolts for positioning the connecting ring. The outer wall of the rotating cylinder has a threaded blind hole that matches the bolt. A high-temperature resistant grinding steel wire brush ring is fixedly sleeved on the outer wall of the connecting ring.

[0010] An inner wall inspection mechanism is fixedly connected to the end of the rotating cylinder away from the rotating mechanism;

[0011] An inner wall repair mechanism is fixedly connected to the inner wall of the rotating cylinder.

[0012] In the above-mentioned steel pipe inner wall grinding device, the control mechanism includes a PLC controller, an alarm and a mobile power supply fixedly connected to the top surface of the U-shaped frame, a heat dissipation mesh support fixedly connected to the upper surface of the U-shaped frame, and a touch screen computer fixedly connected to the top inclined surface of the heat dissipation mesh support.

[0013] In the above-mentioned steel pipe inner wall grinding device, the rotating mechanism includes an extension tube fixedly connected to the outer wall of the rotating cylinder, a rotating bearing fixedly sleeved on the outer wall of the extension tube, a fixed cover fixedly sleeved on the outer ring of the rotating bearing, a fixed bracket fixedly connected to the inner wall of the fixed cover, a rotating motor fixedly connected to the inner wall of the fixed bracket, a transmission gear fixedly connected to the output end of the rotating motor, and an internal gear ring meshing with the transmission gear fixedly connected to the inner wall of the side end of the extension tube.

[0014] In the aforementioned steel pipe inner wall grinding device, the traveling mechanism includes a U-shaped adjusting rod fixedly connected to the outer wall of the fixed cover. An adjusting sleeve is movably sleeved on the rod wall of the U-shaped adjusting rod. A multi-stage electric push rod is fixedly connected to the outer wall of the adjusting sleeve. A pipe robot is fixedly connected to the outer wall of the fixed end of the multi-stage electric push rod. A second electric push rod and a wire harness connector are fixedly connected to the top end of the pipe robot. A rubber positioning block is fixedly connected to the moving end of the second electric push rod.

[0015] In the above-mentioned steel pipe inner wall grinding device, the inner wall inspection mechanism includes a three-way pipe fixedly connected to the side end of the rotating cylinder. The inner walls of the two ends of the three-way pipe are respectively fixedly connected to a multi-frequency microwave inspection probe and a night camera. The top surface of the U-shaped frame is fixedly connected to the main body of the microwave inspection instrument.

[0016] In the aforementioned steel pipe inner wall grinding device, the inner wall repair mechanism includes a fixing ring fixedly connected to the inner wall of a rotating cylinder. A third electric push rod is fixedly connected to the inner wall of the fixing ring. A connecting block is fixedly connected to the moving end of the third electric push rod. Two rectangular movable through holes are opened on the outer wall of the rotating cylinder, and a repair rod is movably connected to the hole wall of each rectangular movable through hole. A connecting shaft is fixedly sleeved at the bottom end of the repair rod. A slot is opened on the outer wall of the connecting block, and two insertion holes that mate with the side end of the connecting shaft are opened on the slot wall. A positioning rod is hinged to the rod wall of the repair rod, and an adjusting block is hinged to the bottom end of the positioning rod. An adjusting groove that mates with the adjusting block is opened on the outer wall of the rotating cylinder. The adjusting block is fixedly connected to the groove wall of the adjusting groove by screws. An infrared ranging sensor is fixedly connected to the inner wall of the side end of the rotating cylinder. A heat insulation cover is fixedly sleeved on the outer wall of the rotating cylinder. A groove is opened on the outer wall of the heat insulation cover, and a heating coil is fixedly sleeved on the groove wall.

[0017] In the above-mentioned steel pipe inner wall grinding device, the outer walls of the fixing ring and the connecting block are provided with multiple wire harness through holes for wire harness passage, and a conductive slip ring is fixedly embedded on the side of the rotating cylinder near the extension tube.

[0018] In the above-mentioned steel pipe inner wall grinding device, multiple telescopic rods are fixedly connected to the outer walls of the rotating cylinder and the fixed cover. A positioning wheel is fixedly connected to the side end of the telescopic rod, and a positioning spring is sleeved on the outer wall of the telescopic rod. The two ends of the positioning spring are fixedly connected to the outer wall of the fixed end of the telescopic rod and the outer wall of the positioning wheel, respectively.

[0019] Compared with existing technologies, the advantages of a steel pipe inner wall grinding device are:

[0020] With its walking mechanism, rotating cylinder, rotating mechanism, and high-temperature resistant grinding steel wire brush ring, when a long steel pipe needs internal wall grinding and cleaning, the steel pipe internal wall grinding device is first moved to the working position. Then, the control mechanism causes the first electric push rod and the arc-shaped positioning block to stably limit the long steel pipe to be ground. Then, the control program pre-installed on the touch screen computer and the PLC controller control the internal wall rotating mechanism and the walking mechanism to work automatically, driving the high-temperature resistant grinding steel wire brush ring to rotate and automatically walk along the internal wall of the long steel pipe to be ground, realizing a comprehensive and reliable grinding treatment of the internal wall of the long steel pipe. This mechanism enables the steel pipe internal wall grinding device to have the function of automatic and efficient grinding and cleaning of the steel pipe internal wall. Moreover, the grinding device is not affected by the length of the steel pipe. At the same time, the steel pipe internal wall grinding device is small in size, which effectively improves the convenience of use of the steel pipe grinding device, and can effectively improve the reliability and efficiency of steel pipe internal wall grinding processing, while reducing the labor intensity of workers.

[0021] With its walking mechanism and inner wall inspection mechanism, the walking mechanism drives the rotating cylinder to automatically move along the inner wall of the long steel pipe to be ground. Meanwhile, the multi-frequency microwave inspection probe and night-vision camera in the inner wall inspection mechanism can rotate and comprehensively scan the inner wall of the long steel pipe. This not only provides a clear understanding of the distribution of oxide impurities on the inner wall of the steel pipe, but also allows for timely detection of uneven thickness on the inner wall. This improves the effectiveness of subsequent grinding processes and ensures that uneven thickness on the inner wall can be repaired promptly and accurately. This enhances the reliability and effectiveness of the steel pipe inner wall grinding device, effectively improving the quality of the steel pipes leaving the factory, while also guaranteeing the strength stability, performance, and lifespan of the steel pipes.

[0022] Through the established internal wall inspection and repair mechanisms, when the internal wall inspection mechanism detects uneven thickness areas on the inner wall of the long steel pipe to be ground, the PLC controller controls the internal wall repair mechanism to automatically and efficiently repair these uneven areas. After the repair is completed, the PLC controller then controls the retraction of multi-stage electric push rods. Once the multi-stage electric push rods have retracted, the second electric push rod also moves the rubber positioning block downwards, and the pipeline robot restarts, completing the subsequent internal wall grinding process of the long steel pipe. During the retraction of the moving end of the rod, the multi-frequency microwave inspection probe of the inner wall inspection mechanism checks the thickness uniformity of the newly repaired position again. If it is still too thick, the overly thick position can be repaired by rotating and grinding with a high-temperature resistant steel wire brush ring. If it is still too thin, it indicates that the long steel pipe has a quality defect. The staff will mark the steel pipe as unqualified in time to prevent unqualified steel pipes from leaving the factory. This mechanism enables the steel pipe inner wall grinding device to have the function of checking and repairing uneven thickness of the inner wall of the steel pipe, thereby effectively improving the quality of the steel pipes leaving the factory. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a steel pipe inner wall grinding device provided by the present invention;

[0024] Figure 2 This is a cross-sectional structural schematic diagram of a steel pipe inner wall grinding device provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the rotating mechanism in a steel pipe inner wall grinding device provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the inner wall inspection mechanism in a steel pipe inner wall grinding device provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the inner wall repair mechanism in a steel pipe inner wall grinding device provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the repair rod portion in a steel pipe inner wall grinding device provided by the present invention;

[0029] Figure 7 This is a schematic diagram of the high-temperature resistant grinding wire brush ring part in a steel pipe inner wall grinding device provided by the present invention.

[0030] In the diagram: 1. U-shaped frame; 2. Rotating cylinder; 3. Roller; 4. First electric push rod; 5. Control mechanism; 51. PLC controller; 52. Alarm; 53. Power bank; 54. Heat dissipation mesh support; 55. Touchscreen computer; 6. Rotating mechanism; 61. Extension tube; 62. Rotary bearing; 63. Fixing cover; 64. Fixing bracket; 65. Rotary motor; 66. Transmission gear; 67. Internal gear ring; 7. Traveling mechanism; 71. U-shaped adjustment rod; 72. Adjusting sleeve; 73. Multi-stage electric push rod; 74. Pipeline robot; 75. Second electric push rod; 76. Wire harness connector; 77. Rubber positioning block; 8. Inner wall inspection mechanism; 81. T-joint. Pipe, 82 Multi-frequency microwave inspection probe, 83 Night camera, 84 Microwave inspection instrument body, 9 Inner wall repair mechanism, 91 Fixing ring, 92 Third electric push rod, 93 Connecting block, 94 Rectangular moving through hole, 95 Repair rod, 96 Connecting shaft, 97 Positioning rod, 98 Adjusting block, 99 Adjusting groove, 910 Infrared ranging sensor, 911 Heat insulation cover, 912 Heating coil, 10 Arc positioning block, 11 Connecting ring, 12 Threaded hole, 13 Bolt, 14 High temperature resistant grinding steel wire brush ring, 15 Wire harness through hole, 16 Conductive slip ring, 17 Telescopic rod, 18 Positioning wheel, 19 Positioning spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1-7 As shown, a steel pipe inner wall grinding device includes a U-shaped frame 1 and a rotating cylinder 2. Two symmetrically distributed rollers 3 are fixedly connected to the bottom ends of both sides of the U-shaped frame 1. The top surface of the U-shaped frame 1 has a mounting hole, and a first electric push rod 4 is fixedly connected to the wall of the mounting hole. An arc-shaped positioning block 10 is fixedly connected to the moving end of the first electric push rod 4. A control mechanism 5 is fixedly connected to the top surface of the U-shaped frame 1. The control mechanism 5 includes a PLC controller 51, an alarm 52, and a mobile power supply 53 fixedly connected to the top surface of the U-shaped frame 1. A heat dissipation mesh support 54 is fixedly connected to the upper surface of the U-shaped frame 1. A touch screen computer 55 is fixedly connected to the top inclined surface of the heat dissipation mesh support 54.

[0033] A rotating mechanism 6 is fixedly connected to the side end of the rotating cylinder 2. The rotating mechanism 6 includes an extension tube 61 fixedly connected to the outer wall of the rotating cylinder 2. A rotating bearing 62 is fixedly sleeved on the outer wall of the extension tube 61. A fixing cover 63 is fixedly sleeved on the outer wall of the outer ring of the rotating bearing 62. A fixing bracket 64 is fixedly connected to the inner wall of the fixing cover 63. A rotating motor 65 is fixedly connected to the inner wall of the fixing bracket 64. A transmission gear 66 is fixedly connected to the output end of the rotating motor 65. An internal gear ring 67 that meshes with the transmission gear 66 is fixedly connected to the inner wall of the side end of the extension tube 61. The rotating mechanism 6 is fixedly connected to the side end of the rotating cylinder 2. The device includes a traveling mechanism 7, which comprises a U-shaped adjusting rod 71 fixedly connected to the outer wall of the fixed cover 63. An adjusting sleeve 72 is movably sleeved on the rod wall of the U-shaped adjusting rod 71. A multi-stage electric push rod 73 is fixedly connected to the outer wall of the adjusting sleeve 72. A pipe robot 74 is fixedly connected to the outer wall of the fixed end of the multi-stage electric push rod 73. A second electric push rod 75 and a wire harness connector 76 are fixedly connected to the top of the pipe robot 74. A rubber positioning block 77 is fixedly connected to the moving end of the second electric push rod 75. This mechanism enables the steel pipe inner wall grinding device to have the function of automatic and efficient grinding and cleaning of the inner wall of the steel pipe.

[0034] A connecting ring 11 is fitted onto the outer wall of the rotating cylinder 2 near the rotating mechanism 6. The outer wall of the connecting ring 11 has two threaded holes 12, and the hole walls of the threaded holes 12 are threaded with bolts 13 for positioning the connecting ring 11. The outer wall of the rotating cylinder 2 has threaded blind holes that mate with the bolts 13. A high-temperature resistant grinding steel wire brush ring 14 is fixedly fitted onto the outer wall of the connecting ring 11. An inner wall inspection mechanism 8 is fixedly connected to the end of the rotating cylinder 2 away from the rotating mechanism 6. The inner wall inspection mechanism 8 includes a three-way pipe 81 that is fixedly connected to the side end of the rotating cylinder 2. A multi-frequency microwave inspection probe 82 and a night camera 83 are fixedly connected to the inner walls of the two ends of the three-way pipe 81, respectively. A microwave inspection instrument body 84 is fixedly connected to the top surface of the U-shaped frame 1. This mechanism enables the staff to clearly observe the specific condition of the inner wall of the steel pipe and ensures the reliability of the grinding treatment of the inner wall of the steel pipe.

[0035] An inner wall repair mechanism 9 is fixedly connected to the inner wall of the rotating cylinder 2. The inner wall repair mechanism 9 includes a fixing ring 91 fixedly connected to the inner wall of the rotating cylinder 2. A third electric push rod 92 is fixedly connected to the inner wall of the fixing ring 91. A connecting block 93 is fixedly connected to the moving end of the third electric push rod 92. Two rectangular moving through holes 94 are opened on the outer wall of the rotating cylinder 2. A repair rod 95 is movably connected to the hole wall of the rectangular moving through holes 94. A connecting shaft 96 is fixedly sleeved at the bottom end of the repair rod 95. A groove is opened on the outer wall of the connecting block 93. Two insertion holes that mate with the side end of the connecting shaft 96 are opened in the groove wall. A positioning rod 97 is hinged to the rod wall of the repair rod 95. An adjusting block 98 is hinged to the bottom end of the positioning rod 97. An adjusting groove 99 that matches the adjusting block 98 is opened on the outer wall of the rotating cylinder 2. The adjusting block 98 is fixedly connected to the groove wall of the adjusting groove 99 by screws. An infrared ranging sensor 910 is fixedly connected to the inner wall of the side end of the rotating cylinder 2. A heat insulation cover 911 is fixedly sleeved on the outer wall of the rotating cylinder 2. A groove is opened on the outer wall of the heat insulation cover 911, and a heating coil 912 is fixedly sleeved on the groove wall. This mechanism enables the steel pipe inner wall grinding device to have the function of checking and repairing uneven thickness of the inner wall of the steel pipe, thereby effectively improving the quality of the steel pipe leaving the factory, and ensuring the strength stability, effect and service life of the steel pipe.

[0036] The outer walls of the fixed ring 91 and the connecting block 93 are provided with multiple wire harness through holes 15 for wire harness passage. A conductive slip ring 16 is fixedly embedded on the side of the rotating cylinder 2 near the extension tube 61. The conductive slip ring 16 can ensure the stable and reliable electrical connection of the electrical equipment in the rotating part. Multiple telescopic rods 17 are fixedly connected to the outer walls of the rotating cylinder 2 and the fixed cover 63. A positioning wheel 18 is fixedly connected to the side end of the telescopic rod 17. A positioning spring 19 is sleeved on the outer wall of the telescopic rod 17. The two ends of the positioning spring 19 are fixedly connected to the outer wall of the fixed end of the telescopic rod 17 and the outer wall of the positioning wheel 18, respectively. The telescopic rod 17, the positioning spring 19 and the positioning wheel 18 work together to constrain the rotating cylinder 2 to be at the central axis inside the steel pipe, ensuring the reliability of the grinding device.

[0037] The first electric actuator 4, alarm 52, rotary motor 65, pipeline robot 74, third electric actuator 92, multi-stage electric actuator 73, heating coil 912, and second electric actuator 75 are electrically connected to the output of PLC controller 51 via wires and wire harness connectors 76. The output of touch screen computer 55, microwave inspection instrument main body 84, and infrared ranging sensor 910 are all electrically connected to the input of PLC controller 51 via wires and wire harness connectors 76. Night camera 83 is electrically connected to the video interface of touch screen computer 55 via wires. Multi-frequency microwave inspection probe 82 is electrically connected to the input of microwave inspection instrument main body 84 via data cable and wire harness connector 76. Mobile power supply 53 can provide stable power to the above-mentioned electrical equipment. The above-mentioned electrical equipment and electrical connections are all existing technologies and will not be described in detail here.

[0038] The operating principle of the present invention is described as follows: When a long steel pipe needs to be ground on its inner wall, firstly, a steel pipe inner wall grinding device that matches the inner diameter of the long steel pipe to be ground is selected. Then, the steel pipe inner wall grinding device is moved to one side end of the long steel pipe to be ground by the roller 3. The first electric push rod 4 is extended by the control program pre-installed on the touch screen computer 55 and the PLC controller 51, so that the first electric push rod 4 pushes the arc-shaped positioning block 10 to squeeze the outer wall of the side end of the long steel pipe to be ground, and stably limits the long steel pipe to be ground on the ground.

[0039] Then, the control program pre-installed on the touch screen computer 55 and the PLC controller 51 control the inner wall inspection mechanism 8, the rotating mechanism 6, and the traveling mechanism 7 to work automatically. After the pipe robot 74 of the traveling mechanism 7 is started, it automatically pushes the inner wall inspection mechanism 8, the rotating cylinder 2, and the rotating mechanism 6 into the interior of the long steel pipe to be ground. Multiple positioning wheels 18 contact the inner wall of the long steel pipe, and with the elasticity of the positioning spring 19 and the cooperation of the telescopic rod 17, the rotating cylinder 2 can be adjusted to the central axis of the long steel pipe to be ground, ensuring the inner wall of the long steel pipe is ground. To ensure the accuracy of repair and inspection work, the rotary motor 65 of the rotating mechanism 6 is started under control. The rotary motor 65 drives the extension rod to rotate through the transmission gear 66 and the internal gear ring 67, and drives the rotating cylinder 2 to rotate. After the rotating cylinder 2 rotates, it drives the high-temperature resistant grinding steel wire brush ring 14 to rotate through the bolt 13 and the connecting ring 11. The rotating high-temperature resistant grinding steel wire brush ring 14 can comprehensively and efficiently grind and clean the oxide impurities on the inner wall of the long steel pipe, ensuring the cleanliness of the inner wall of the long steel pipe. Moreover, the grinding of the inner wall of the steel pipe is not limited by the length of the steel pipe.

[0040] While the steel pipe inner wall grinding device is working, the night camera 83 is rotated by the rotating cylinder 2 and the tee pipe 81. The night camera 83 then captures a clear image of the inner wall of the long steel pipe to be ground, which is transmitted to the touchscreen computer 55. The touchscreen computer 55 plays the images captured by the night camera 83, allowing staff to monitor the distribution of oxide impurities on the inner wall of the long steel pipe in real time. The touchscreen computer 55 and PLC controller 51 can also control the speed of the pipe robot 74 in a timely manner. For example, if there are too many oxide impurities in a certain area of ​​the inner wall of the long steel pipe, the working... By reducing the travel speed of the pipeline robot 74, the rotating high-temperature resistant grinding wire brush ring 14 has sufficient time to reliably grind and clean the area, ensuring the grinding effect on the inner wall of the long steel pipe to be ground. This mechanism enables the steel pipe inner wall grinding device to have the function of automatic and efficient grinding and cleaning of the inner wall of the steel pipe. Moreover, the grinding device is not affected by the length of the steel pipe. At the same time, the steel pipe inner wall grinding device is small in size, which effectively improves the ease of use of the steel pipe grinding device, and can effectively improve the reliability and efficiency of the steel pipe inner wall grinding process, while reducing the labor intensity of the workers.

[0041] While the steel pipe inner wall grinding device is working, the multi-frequency microwave inspection probe 82 is also rotated by the rotating cylinder 2 and the tee pipe 81, and scans the inner wall of the long steel pipe to be tested. The inspection results are transmitted to the main body 84 of the microwave inspection instrument through the wiring harness and wiring harness connector 76. The multi-frequency microwave inspection probe 82 emits microwaves to the inner wall of the steel pipe. Since the rotating cylinder 2 is positioned at the axis of the pipe, the distance between the microwaves emitted by the multi-frequency microwave inspection probe 82 at different angles and the inner wall of the long steel pipe to be ground is consistent, ensuring the accuracy of the multi-frequency microwave inspection probe 82 in inspecting the uneven thickness of the inner wall of the long steel pipe to be ground. Specifically, the multi-frequency microwave inspection probe 82 emits microwaves to the inner wall of the steel pipe, based on the microwaves in different media... Based on the principle of different propagation characteristics, when microwaves encounter a change in the thickness of the inner wall of the long steel pipe to be ground, the signal will change due to reflection, refraction, scattering and absorption, such as changes in the amplitude, phase and frequency of the signal. Then, the receiving module in the multi-frequency microwave inspection probe 82 receives these changed signals and transmits them to the main body 84 of the microwave inspection instrument. After processing and analysis by the main body 84, the relevant electrical signals representing the abnormal thickness of the inner wall of the long steel pipe to be ground are fed back to the PLC controller 51. After receiving these electrical signals related to the abnormal characteristics, the PLC controller 51 will control the alarm 52 to sound an alarm. The alarm 52 will remind the staff that there is an uneven thickness of the inner wall of the long steel pipe to be ground.

[0042] Simultaneously, the automatic movement of the pipeline robot 74 is paused. Then, the PLC controller 51 controls the second electric push rod 75, the third electric push rod 92, and the heating coil 912 to start. The second electric push rod 75 pushes the rubber positioning block 77 to contact the inner wall of the long steel pipe to be ground, achieving reliable positioning of the pipeline robot 74 and preventing the pipeline robot 74 from shaking during the rotation repair process of the repair rod 95. After the heating coil 912 is powered on, it can heat up the uneven thickness areas of the inner wall of the long steel pipe to be ground, softening the uneven thickness areas and reducing the subsequent repair resistance of the repair rod 95, thus ensuring the repair effect and speed. After the third electric push rod 92 starts, it pushes the connecting block 9... 3. The infrared ranging sensor 910 also monitors the distance between itself and the connecting block 93 in real time, and converts the distance value into an electrical signal and sends it to the PLC controller 51. When the infrared ranging sensor 910 checks that the distance between itself and the connecting block 93 meets the distance threshold preset by the PLC controller 51, the PLC controller 51 promptly controls the moving end of the second electric push rod 75 to stop moving. During the movement of the connecting block 93, under the constraint of the adjusting block 98 and the positioning rod 97, the repair rod 95 will unfold. After unfolding, the top of the repair rod 95 contacts the inner wall of the qualified area of ​​the long steel pipe to be ground. Then, the multi-stage electric push rod 73 is started by the controller of the touch screen computer 55 and the PLC controller 51. When the moving end of the multi-stage electric push rod 73 extends, it pushes the rotating cylinder 2, which is in a rotating state, to move through the rotating mechanism 6. The rotating cylinder 2 drives the inner wall repair mechanism 9 to approach the position where the thickness of the inner wall of the long steel pipe to be ground is uneven, which is found by the multi-frequency microwave inspection probe 82. The rotating and reliably positioned repair rod 95 can push the softened protruding part of the heating coil 912 to the recessed area to compensate for the lack of material in this area and ensure that the thickness of the inner wall of the long steel pipe to be ground is uniform. After the inner wall of the long steel pipe is repaired, the PLC controller 51 controls the multi-stage electric push rod 73 to retract. After the multi-stage electric push rod 73 retracts, the second electric push rod 75 also drives the rubber positioning block 77 to move down and controls the pipeline robot 74 to start again. After completing the subsequent inner wall grinding of the long steel pipe to be ground, during the retraction of the moving end of the multi-stage electric push rod 73, the multi-frequency microwave inspection probe 82 of the inner wall inspection mechanism 8 checks the thickness uniformity of the just-repaired position again. If there is still an excessive thickness, the excessively thick position can be repaired by grinding with the rotating high-temperature resistant grinding wire brush ring 14. If there is still an excessive thinness, it indicates that the long steel pipe has a quality defect. The staff will mark the steel pipe as unqualified in time to prevent unqualified steel pipes from leaving the factory. This mechanism enables the steel pipe inner wall grinding device to have the function of checking and repairing the uneven thickness of the inner wall of the steel pipe, thereby effectively improving the quality of the steel pipes leaving the factory and ensuring the strength stability, effect and service life of the steel pipes.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel pipe inner wall grinding device, comprising a U-shaped frame (1) and a rotating cylinder (2), characterized in that, Two symmetrically distributed rollers (3) are fixedly connected to the bottom ends of both sides of the U-shaped frame (1). The top surface of the U-shaped frame (1) is provided with an installation hole, and a first electric push rod (4) is fixedly connected to the wall of the installation hole. An arc-shaped positioning block (10) is fixedly connected to the moving end of the first electric push rod (4). A control mechanism (5) is fixedly connected to the top surface of the U-shaped frame (1). The rotating cylinder (2) is fixedly connected to a rotating mechanism (6) at one end, and the rotating mechanism (6) is fixedly connected to a traveling mechanism (7) at one end. A connecting ring (11) is sleeved on the outer wall of the rotating cylinder (2) near the rotating mechanism (6). The outer wall of the connecting ring (11) has two threaded holes (12), and the hole wall of the threaded holes (12) is threaded with bolts (13) for positioning the connecting ring (11). The outer wall of the rotating cylinder (2) has a threaded blind hole that matches the bolts (13). A high-temperature resistant grinding steel wire brush ring (14) is fixedly sleeved on the outer wall of the connecting ring (11). The inner wall inspection mechanism (8) is fixedly connected to the end of the rotating cylinder (2) away from the rotating mechanism (6); The inner wall of the rotating cylinder (2) is fixedly connected to an inner wall repair mechanism (9); The rotating mechanism (6) includes an extension tube (61) fixedly connected to the outer wall of the rotating cylinder (2). A rotating bearing (62) is fixedly sleeved on the outer wall of the extension tube (61). A fixed cover (63) is fixedly sleeved on the outer wall of the outer ring of the rotating bearing (62). A fixed bracket (64) is fixedly connected to the inner wall of the fixed cover (63). A rotating motor (65) is fixedly connected to the inner wall of the fixed bracket (64). A transmission gear (66) is fixedly connected to the output end of the rotating motor (65). An internal gear ring (67) meshing with the transmission gear (66) is fixedly connected to the inner wall of the side end of the extension tube (61). The inner wall inspection mechanism (8) includes a three-way pipe (81) fixedly connected to the side end of the rotating cylinder (2). The inner walls of the two ends of the three-way pipe (81) are respectively fixedly connected to a multi-frequency microwave inspection probe (82) and a night camera (83). The top surface of the U-shaped frame (1) is fixedly connected to the main body of the microwave inspection instrument (84). The inner wall repair mechanism (9) includes a fixed ring (91) fixedly connected to the inner wall of the rotating cylinder (2). A third electric push rod (92) is fixedly connected to the inner wall of the fixed ring (91). A connecting block (93) is fixedly connected to the moving end of the third electric push rod (92). Two rectangular moving through holes (94) are opened on the outer wall of the rotating cylinder (2). A repair rod (95) is movably connected to the hole wall of the rectangular moving through hole (94). A connecting shaft (96) is fixedly sleeved at the bottom end of the repair rod (95). A groove is opened on the outer wall of the connecting block (93). Two grooves are opened on the groove wall that are connected to the side end of the connecting shaft (96). The repair rod (95) has a positioning rod (97) hinged to its wall, and an adjustment block (98) is hinged to the bottom end of the positioning rod (97). The outer wall of the rotating cylinder (2) has an adjustment groove (99) that matches the adjustment block (98). The adjustment block (98) is fixedly connected to the groove wall of the adjustment groove (99) by screws. An infrared ranging sensor (910) is fixedly connected to the inner wall of the side end of the rotating cylinder (2). A heat insulation cover (911) is fixedly sleeved on the outer wall of the rotating cylinder (2). A groove is opened on the outer wall of the heat insulation cover (911), and a heating coil (912) is fixedly sleeved on the groove wall. Multiple telescopic rods (17) are fixedly connected to the outer walls of the rotating cylinder (2) and the fixed cover (63). A positioning wheel (18) is fixedly connected to the side end of the telescopic rod (17). A positioning spring (19) is sleeved on the outer wall of the telescopic rod (17). The two ends of the positioning spring (19) are fixedly connected to the outer wall of the fixed end of the telescopic rod (17) and the outer wall of the positioning wheel (18), respectively.

2. The steel pipe inner wall grinding device according to claim 1, characterized in that, The control mechanism (5) includes a PLC controller (51), an alarm (52) and a mobile power supply (53) fixedly connected to the top surface of the U-shaped frame (1). A heat dissipation mesh bracket (54) is fixedly connected to the upper surface of the U-shaped frame (1), and a touch screen computer (55) is fixedly connected to the top slope of the heat dissipation mesh bracket (54).

3. The steel pipe inner wall grinding device according to claim 1, characterized in that, The traveling mechanism (7) includes a U-shaped adjustment rod (71) fixedly connected to the outer wall of the fixed cover (63). The rod wall of the U-shaped adjustment rod (71) is movably sleeved with an adjustment sleeve (72). The outer wall of the adjustment sleeve (72) is fixedly connected to a multi-stage electric push rod (73). The outer wall of the fixed end of the multi-stage electric push rod (73) is fixedly connected to a pipeline robot (74). The top end of the pipeline robot (74) is fixedly connected to a second electric push rod (75) and a wire harness connector (76). The moving end of the second electric push rod (75) is fixedly connected to a rubber positioning block (77).

4. The steel pipe inner wall grinding device according to claim 1, characterized in that, The outer walls of the fixing ring (91) and the connecting block (93) are provided with multiple wire harness through holes (15) for wire harness passage, and a conductive slip ring (16) is fixedly embedded on the side of the rotating cylinder (2) near the extension tube (61).

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