A galvanized pipe detection device and a repairing method

Abstract

The application discloses a kind of galvanized pipe detection device and repair method, it is related to pipeline detection field, the drive assembly of this scheme is by motor and gear group composition, its output end is respectively equipped with the drive shaft and transmission shaft of mutual reversal, two wheel body components are respectively installed on drive shaft and transmission shaft, and are all by wheel frame and multiple hollow column wheels rotating therebetween composition.Magnetic control switching component includes the slide and the cooperative seat that can be reliably closed or away under the action of electromagnet, it is with the side cover of wheel frame fixed cooperation dynamic magnetic block and fixed magnetic seat, realize the switching of detection state and repair state.In detection mode, hollow column wheel is evenly expanded and adheres to pipe wall, and combines detector to complete roughness detection;In repair mode, hollow column wheel is retracted, side cover and fixed magnetic seat are magnetically positioned, and abrasive block is expanded under the action of centrifugal force, and abnormal section is polished and polished.The scheme realizes detection and repair integrated operation, with fast switching, positioning stable, detection accurate and repair targeted effect.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection, and more particularly to a galvanized pipe inspection device and repair method. Background Technology

[0002] Galvanized pipes are commonly used in construction, media transportation, and corrosion protection projects. Their performance stability depends not only on the quality of the base steel pipe but also closely on the uniformity and surface condition of the inner galvanized coating. The roughness of the inner coating directly affects the fluid resistance and energy consumption during pipe operation. High roughness leads to reduced fluid velocity and increased pressure drop, thus affecting overall transportation efficiency. Furthermore, a rough surface easily accumulates impurities or deposits, shortening the pipe's lifespan and causing secondary pollution in water supply pipelines. Therefore, the roughness of the inner coating is a critical parameter in the quality inspection of galvanized pipes.

[0003] However, due to the enclosed space and complex testing conditions of the inner wall of galvanized pipes, traditional external wall testing methods are difficult to apply directly. This results in limitations in the accuracy, convenience, and operability of existing testing methods (sampling method, indirect hydraulic method, and endoscopic laser scanning). Traditional methods often lack effective detection and management of inner wall roughness, failing to meet the demands of high-standard applications. This technical bottleneck not only affects the effective evaluation of coating quality but also restricts the widespread application of galvanized pipes in high-standard projects and specific fields. Therefore, researching and developing roughness detection techniques suitable for the inner wall of galvanized pipes, and even local repair techniques during the testing process, is of great significance. Summary of the Invention

[0004] The purpose of this invention is to provide a galvanized pipe inspection device and repair method to solve the problems of difficulty in detecting and repairing the roughness of the inner wall of traditional large-span galvanized pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a galvanized pipe detection device and repair method, comprising a drive assembly and multiple detectors mounted thereon, and a slip ring providing power to the entire assembly; the drive assembly has wheel assemblies at both ends, and further comprises:

[0006] A magnetically controlled switching component for changing the shape of wheel components;

[0007] The drive assembly includes a motor and a gear set that drives one end of the motor, and the output ends of the motor and the gear set are respectively equipped with a drive shaft and a transmission shaft that rotate in opposite directions.

[0008] The two wheel assemblies are respectively mounted on the drive shaft and the transmission shaft, and include two wheel carriers and multiple hollow cylindrical wheels rotating between them;

[0009] The magnetically controlled switching assembly includes a carriage and a cooperating seat that are brought closer or moved away by the magnetic force of a set of electromagnets. Each side of the carriage and the cooperating seat is provided with a side cover that is fixed to the corresponding wheel frame. Each side cover has a moving magnetic block fixed to the opposite side. The assembly also includes a fixed magnetic seat that is supported by the repulsive force of the two moving magnetic blocks.

[0010] When the two electromagnets repel each other, the carriage and the cooperating seat move away from each other, press the two wheel frames closer together, and cause the hollow column wheel to expand and contact the tube wall. The motor, through the gear set, drives the two wheel assembly to slowly rotate, and the whole moves inside the tube.

[0011] When the two electromagnets attract each other, the carriage and the cooperating seat approach each other and pull the two wheel frames away, causing the hollow column wheel to stretch away from the tube wall. The two side covers approach and squeeze the fixed magnetic seat. The fixed magnetic seat expands and clamps the tube wall, and the reaction side covers expand and fit against the tube wall. The motor, through the gear set, drives the shaft and transmission shaft to rotate the two side covers, which, together with the fixed magnetic seat support, polishes the tube wall.

[0012] As a further description of the above technical solution: the gear set includes a gear disk fixed on the opposite ends of the drive shaft and the transmission shaft, and the opposite surfaces of the two gear disks mesh with a plurality of transmission gears. The motor is fixed with a gear frame for rotating the transmission gears, and a shaft frame for rotating support of the transmission shaft is fixed on one side of the gear frame.

[0013] As a further description of the above technical solution: the drive shaft is the rotor shaft of the motor, and the detector is fixed on the motor.

[0014] As a further description of the above technical solution: the wheel assembly also includes two inclined guide seats with opposite faces fixed, and the inclined surface of the inclined guide seat is consistent with the inclination of the hollow column wheel. The inclined guide seat and the wheel frame are slidably disposed on the surface of the adapter sleeve, and the adapter sleeve is interference-fitted on the drive shaft or transmission shaft after being limited by the nut, and the inclined guide seat and the wheel frame on the same side are fixed together.

[0015] As a further description of the above technical solution: the slide includes a left pressure seat on which electromagnets are symmetrically mounted with the cooperating seat, and four sliding shafts that slide through the four corners of the motor are fixed on the left pressure seat, and the other end of the four sliding shafts is fixed to a right pressure seat.

[0016] As a further description of the above technical solution: the inner walls of the cooperating seat and the right pressure seat are rotatably connected to sliding sleeves, the sliding sleeves are splinedly connected to the surface of the adapter sleeve, and the side cover is fixed to one end of the corresponding sliding sleeve.

[0017] As a further description of the above technical solution: the fixed magnetic base includes a fixed block fixed on the motor, and fixed magnetic blocks are symmetrically arranged on both sides of the fixed block. Sliding pins are fixed on the opposite surfaces of the two fixed magnetic blocks. A through groove is opened on the fixed block for the two sliding pins to limit the sliding. A metal sheet attached to one side of the fixed block is fixed on the opposite surfaces of the two fixed magnetic blocks.

[0018] As a further description of the above technical solution: the fixed magnetic block and the corresponding moving magnetic block on the same side have the same magnetic poles.

[0019] As a further description of the above technical solution: the outer side wall of the side cover is provided with a plurality of strip-shaped holes, and slots for accommodating grinding blocks are provided at the intervals of the strip-shaped holes.

[0020] As a further description of the above technical solution: the inner wall of the side cover is annularly fitted with a sponge ring, and the sponge ring is located at the strip-shaped cutout.

[0021] As a further description of the above technical solution: a method for detecting and repairing galvanized pipes, comprising the following methods:

[0022] By energizing an electromagnet to generate a repulsive force, the coordinating seat and the slide are driven away from each other and the wheel frame is moved closer, so that the hollow column wheel expands evenly and fits against the inner wall of the pipe.

[0023] The starter motor drives the drive shaft and transmission shaft to rotate in opposite directions, driving the two wheel assemblies to rotate relative to each other while they are in contact with the pipe wall, thus achieving stable movement of the device inside the pipeline;

[0024] During the movement, the detector comes into contact with the inner wall of the pipe and performs roughness detection;

[0025] When an abnormal section is detected, the direction of the electromagnet current is adjusted to make them attract each other, which drives the wheel frame away and causes the hollow column wheel to retract. At the same time, the side cover and the fixed magnetic base are positioned by magnetic force.

[0026] The high-speed rotation of the motor drives the side cover to rotate, and the grinding block unfolds under the action of centrifugal force to polish and repair the abnormal section of the pipe wall.

[0027] After the repair is completed, the rotation speed is reduced, the grinding block is reset and re-embedded in the slot, the electromagnet current is reduced, the side cover and the fixed magnetic base are released from positioning, and the device resumes detection state and continues to move.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] In operation, this solution first involves energizing two electromagnets. The repulsive force of these electromagnets causes the coordinating seat and slide to move away from each other and press the two wheel frames together. This causes the hollow roller to be compressed and expand evenly along the tilting direction until the rubber-material hollow roller contacts the inner wall of the pipe. Then, the motor, through a drive shaft and gear set, reverses the transmission shaft, causing the two wheel assemblies to reverse while in contact with the pipe wall, thus counteracting the torsional force and allowing them to move forward and backward along the pipe wall. During this movement, the detector's contacts elastically contact the inner wall of the pipe, and the overall movement linearly performs roughness detection on the inner wall. This method ensures uniform and stable contact between the hollow roller and the pipe wall, enabling the detector to perform linear and continuous roughness detection along the inner surface of the pipe with a constant contact force, thereby improving the consistency and accuracy of roughness detection.

[0030] Optionally, depending on the needs, if the diameter and number of teeth of the two toothed discs are the same, then the speed between the drive shaft and the transmission shaft is the same, the speed of the two wheel components is the same, and the detector basically moves in a straight line for detection. When needed, two customized toothed discs of different sizes are selected so that the speed of the two wheel components has a controllable difference. In this way, the two wheel components rotating in opposite directions cannot completely cancel the torsional force, so that the overall selection is achieved during the movement, and the detector performs pipe wall roughness detection in a spiral trajectory.

[0031] When an abnormal roughness section is detected, polishing repair can be selected. By reversing the current direction of one of the electromagnets, the magnetic field direction changes, and the two electromagnets become attracted to each other. The cooperating seat and the left pressure seat then move closer, while the right pressure seat and the cooperating seat pull the wheel frame, slightly stretching the hollow cylindrical wheel. At this time, the hollow cylindrical wheel does not contact the tube wall. As the two side covers move closer, the repulsive force between the moving magnetic block of the side cover and the fixed magnetic block on the fixed magnetic seat causes them to squeeze against each other, resulting in a slight expansion of the side covers and deformation of the slots, loosening the grinding block. Subsequently, the motor moves... The low-speed rotation is converted to high-speed rotation. As the two side covers rotate at high speed, the grinding blocks are thrown out by centrifugal force and put into contact with the inner wall of the pipe for polishing. After polishing, as the rotation speed decreases, the magnetic force of the passive magnetic block of the module resets it into the slot. The deformation of the slot can be contacted to complete the reset. This method realizes the direct repair of abnormal areas in the pipe after continuous inspection of roughness detection process. The high-speed displacement of the grinding blocks combined with the pressure and contact of centrifugal force achieves polishing and repairs the flatness of the internal galvanized layer.

[0032] Under the pressure of the two side covers, the two symmetrical fixed magnets are displaced slightly, allowing them to slide stably through the positioning pins and through slots, thus maintaining the metal sheet. After the metal sheet bends, it is pressed against the tube wall to keep it in position. The metal sheet is supported to prevent torsion, thus achieving overall support during the grinding process and preventing the metal sheet from spinning during the grinding process, which would reduce the grinding effect.

[0033] In summary, its motion stability ensures accurate detection, leading to more precise targeted repairs. Furthermore, adaptive contact and on-demand abrasive block release reduce unnecessary wear, extend component life, and lower maintenance frequency. The integrated design from detection to repair significantly shortens the work cycle and reduces manual intervention. Overall, the synergistic cooperation of the structures has achieved remarkable results in improving operational efficiency, ensuring repair quality, and guaranteeing detection accuracy. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0035] Figure 2 This is a front view schematic diagram of the present invention;

[0036] Figure 3 This is a frontal cross-sectional view of the present invention;

[0037] Figure 4 This is a three-dimensional cross-sectional schematic diagram of the present invention;

[0038] Figure 5 This is a cross-sectional schematic diagram of the three-dimensional fixed magnetic base of the present invention;

[0039] Figure 6 This is a partial exploded view of the drive shaft side of the present invention;

[0040] Figure 7 This is a schematic diagram illustrating the interaction between the motor and the carriage of the present invention;

[0041] Figure 8 This is a schematic diagram of the cooperation between the motor and the carriage of the present invention from another perspective;

[0042] Figure 9 This is an exploded view of the present invention.

[0043] Legend:

[0044] 10. Drive assembly; 11. Motor; 12. Drive shaft; 13. Gear disc; 14. Transmission gear; 15. Gear frame; 16. Shaft frame; 17. Drive shaft;

[0045] 20. Wheel assembly; 21. Wheel frame; 22. Angled guide seat; 23. Hollow cylindrical wheel; 24. Adapter sleeve;

[0046] 30. Magnetic control switching assembly; 31. Carriage; 311. Slide shaft; 312. Right pressure seat; 313. Left pressure seat; 32. Coordinating seat; 33. Electromagnet; 34. Sliding sleeve; 35. Side cover; 36. Grinding block; 37. Moving magnetic block; 38. Fixed magnetic seat; 381. Fixing block; 382. Through slot; 383. Sliding pin; 384. Fixed magnetic block; 385. Metal sheet;

[0047] 40. Detector; 50. Electrical slip ring. Detailed Implementation

[0048] 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.

[0049] like Figure 1 - Figure 9 As shown, the present invention provides a galvanized pipe detection device and repair method, including a drive assembly 10 and a plurality of detectors 40 mounted thereon, and a slip ring 50 for supplying power to the entire assembly. The drive assembly 10 has wheel assemblies 20 at both ends for transmission, and also includes:

[0050] A magnetically controlled switching component 30 that changes the shape of the wheel assembly 20;

[0051] By setting up a magnetically controlled switching component 30, and utilizing the repulsion and attraction of electromagnets 33, rapid switching between the wheel frame 21 and the side cover 35 in the detection and repair states can be achieved. This allows the hollow cylindrical wheel 23 to expand uniformly and conform to the pipe wall to ensure detection accuracy, or, when needed, it can retract and combine with the side cover 35 and the fixed magnetic base 38 to form a stable position to complete the repair operation. This method avoids complex mechanical switching structures, reduces energy consumption and failure rate, and ensures adaptive contact and stable operation of the device during the detection and repair process inside the pipe.

[0052] The drive assembly 10 includes a motor 11 and a gear set that drives one end of the motor 11 and the gear set, and the output ends of the motor 11 and the gear set are respectively equipped with a drive shaft 12 and a transmission shaft 17 that rotate in opposite directions.

[0053] By using the motor 11 and gear set to form the mutual reversal output of the drive shaft 12 and transmission shaft 17, the two wheel assemblies 20 can be driven to rotate synchronously in opposite directions. This effectively counteracts the torque in the pipeline and keeps the device moving forward or backward stably, thereby improving the detection accuracy and repair reliability.

[0054] Two wheel assemblies 20 are respectively mounted on the drive shaft 12 and the transmission shaft 17, including two wheel frames 21 and a plurality of hollow cylindrical wheels 23 rotating therebetween;

[0055] By installing wheel assemblies 20 on the drive shaft 12 and transmission shaft 17 respectively, and the wheel assembly 20 is composed of two wheel frames 21 and multiple hollow rollers 23 rotating between them, the device can form a uniform contact with the pipe wall through the multiple hollow rollers 23 inside the pipe. This not only increases the support area and ensures the stability of the operation, but also uses the rubber elastic material of the hollow rollers 23 to act as a buffer, avoiding scratches on the pipe wall. In addition, the distributed rotation structure of the multiple hollow rollers 23 can effectively reduce the frictional resistance at a single point, thereby improving the smoothness and detection accuracy of the device when moving forward and backward in the pipe.

[0056] The magnetic switching assembly 30 includes a slide 31 and a cooperating seat 32 that are brought closer or moved away by the magnetic force of a set of electromagnets 33. Each side of the slide 31 and the cooperating seat 32 is provided with a side cover 35 that is fixed to the corresponding wheel frame 21. Each side of the two side covers 35 is fixed with a moving magnetic block 37 on the opposite side. It also includes a fixed magnetic seat 38 that is supported by the repulsive force of the two moving magnetic blocks 37.

[0057] By setting up a magnetically controlled switching component 30, the magnetic force of the electromagnet 33 drives the slide 31 to move closer to or away from the cooperating seat 32, thereby causing the side cover 35, which is fixed to the wheel frame 21, to change position. This, in turn, creates a magnetic repulsion support with the moving magnetic block 37 and the fixed magnetic seat 38 fixed within the side cover 35. This allows the device to quickly switch between detection and repair modes. In detection mode, when the side cover 35 moves away, it drives the wheel frame 21 to move closer, causing the hollow column wheel 23 to expand evenly and adhere to the pipe wall, achieving stable detection. In repair mode, the side cover 35 moves closer and is clamped and positioned by the repulsion between the moving magnetic block 37 and the fixed magnetic seat 38, ensuring the fixed magnetic seat 38 firmly supports the pipe wall. Simultaneously, the outer grinding block 36 of the side cover 35 can reliably unfold, enabling polishing and repair of local anomalies. This structure simplifies the complexity of the mechanism while ensuring rapid switching, stable positioning, and reliable contact during the detection and repair processes.

[0058] When the two electromagnets 33 repel each other, the carriage 31 and the cooperating seat 32 move away from each other, squeezing the two wheel frames 21 closer together and causing the hollow column wheel 23 to expand and contact the tube wall. The motor 11, through the gear set, drives the shaft 12 and the transmission shaft 17, and slowly rotates the two wheel body assemblies 20 to move the whole in the tube.

[0059] When the two electromagnets 33 attract each other, the slide 31 and the cooperating seat 32 approach each other and pull the two wheel frames 21 away, causing the hollow column wheel 23 to stretch away from the tube wall. The two side covers 35 approach and squeeze the fixed magnetic seat 38. The fixed magnetic seat 38 expands and clamps the tube wall, and the side covers 35 expand and adhere to the tube wall in reaction. The motor 11 drives the two side covers 35 to rotate through the gear set, drive the shaft 12 and the transmission shaft 17, and grinds the tube wall in combination with the support of the fixed magnetic seat 38.

[0060] This solution combines the reverse transmission structure of the motor 11-gear set with the magnetic switching component 30, enabling not only smooth propulsion of the dual wheels and ensuring detection accuracy within the pipeline, but also rapid switching between detection and repair states via the magnetic cooperation of the slide 31 driven by the electromagnet 33, the cooperating seat 32, and the side cover 35-fixed magnetic seat 38. This allows the hollow column wheel 23 and the grinding block 36 to perform uniform contact detection and local polishing repair, respectively. This collaborative design avoids the shortcomings of traditional devices that require separate operations or mechanical switching for detection and repair. While achieving integrated detection-positioning-repair, it significantly improves operational convenience, positioning stability, and targeted repair.

[0061] Specifically, such as Figure 8 As shown, the gear set includes a gear disk 13 fixed at the opposite ends of the drive shaft 12 and the transmission shaft 17, and several transmission gears 14 mesh together on the opposite surfaces of the two gear disks 13. A gear frame 15 for rotating the transmission gears 14 is fixed on the motor 11, and a shaft frame 16 for rotating support of the transmission shaft 17 is fixed on one side of the gear frame 15.

[0062] By setting up a gear set through the cooperation of the gear disk 13 and the transmission gear 14, the output power of the motor 11 through the drive shaft 12 is converted into the reverse rotation of the transmission shaft 17. At the same time, by optionally differentiating the transmission ratio of the two gear disks 13, the speed difference of the front and rear wheel assembly 20 can be realized, forming a displacement spin and improving the tube wall detection effect.

[0063] Specifically, such as Figure 3 As shown, drive shaft 12 is the rotor shaft of motor 11, and detector 40 is fixed on motor 11.

[0064] By extending one end of the rotor shaft of the motor 11 to form a drive shaft 12, multi-axis connection is not required without traditional couplings, which is suitable for compact internal structure design. At the same time, the motor 11 is provided with power sockets for the detector 40 on all four sides, so that it can be fixed and powered after insertion.

[0065] Specifically, such as Figure 3 and Figure 6 As shown, the wheel assembly 20 also includes two wheel frames 21 with their opposite faces fixed to the inclined guide seats 22. The inclined surface of the inclined guide seats 22 is consistent with the inclination of the hollow column wheel 23. The inclined guide seats 22 and the wheel frames 21 are slidably disposed on the surface of the adapter sleeve 24. The adapter sleeve 24 is interference-fitted onto the drive shaft 12 or the transmission shaft 17 after being limited by a nut. The inclined guide seats 22 and the wheel frames 21 on the same side are fixed to each other.

[0066] The two wheel frames 21 of the wheel assembly 20 can maintain the hollow column wheel 23 at a uniform bevel angle during installation. At the same time, the inclined guide seat 22 between the two wheel frames 21 can maintain close sliding. When subjected to pressure, the two wheel frames 21 can move closer to the hollow column wheel 23 while deflecting, keeping the hollow column wheel 23 under pressure and expanding evenly along the axial position. Meanwhile, the middle section of the hollow column wheel 23 is made of soft hollow rubber material, which can enhance its expansion effect during compression.

[0067] Specifically, such as Figure 9 As shown, the slide 31 includes a left pressure seat 313 symmetrically mounted with an electromagnet 33 on the cooperating seat 32, and four sliding shafts 311 that slide through the four corners of the motor 11 are fixed on the left pressure seat 313, and the other ends of the four sliding shafts 311 are jointly fixed with a right pressure seat 312.

[0068] By setting up a slide 31, which is composed of a left pressure seat 313, a right pressure seat 312 and a sliding shaft 311 between them, when the left pressure seat 313 is acted upon by an electromagnet 33, it can transfer the attraction or repulsion force to the right pressure seat 312 through the sliding shaft 311, so that the two wheel assemblies 20 can be simultaneously subjected to pulling or compressing forces.

[0069] Specifically, such as Figure 4 As shown, the inner walls of the cooperating seat 32 and the right pressure seat 312 are rotatably connected to the sliding sleeve 34. The sliding sleeve 34 is splinedly connected to the surface of the adapter sleeve 24, and the side cover 35 is fixed to one end of the corresponding sliding sleeve 34.

[0070] By setting the sliding sleeve 34, the sliding sleeve 34 can maintain axial sliding on the surface of the adapter sleeve 24. At the same time, when the adapter sleeve 24 rotates, the sliding sleeve 34 can rotate accordingly, maintaining stable transmission to the side cover 35.

[0071] Specifically, such as Figure 5 As shown, the fixed magnet base 38 includes a fixed block 381 fixed on the motor 11, and fixed magnet blocks 384 are symmetrically arranged on both sides of the fixed block 381. Sliding pins 383 are fixed on the opposite surfaces of the two fixed magnet blocks 384. A through groove 382 is provided on the fixed block 381 for limiting the sliding of the two sliding pins 383. A metal sheet 385 attached to one side of the fixed block 381 is fixed on the opposite surfaces of the two fixed magnet blocks 384.

[0072] By setting a fixed magnetic base 38, the fixed magnetic base 38 can cooperate with the sliding pin 383 through the through groove 382 opened on it to support the displacement of the fixed magnetic block 384. At the same time, the metal sheet 385 can prevent the fixed magnetic block 384 from twisting. When two fixed magnetic blocks 384 are close, they can slide in the through groove 382 with the sliding pin 383 and squeeze the metal sheet 385 to bend, so that the metal sheet 385 contacts the pipe wall, so that the fixed magnetic block 384 forms a strong support and cannot move. Then the side cover 35 deforms under pressure.

[0073] Specifically, such as Figure 1 As shown, the fixed magnetic block 384 and the corresponding moving magnetic block 37 on the same side have the same magnetic poles.

[0074] By setting the fixed magnetic block 384 and the moving magnetic block 37 to have the same magnetic poles, the moving magnetic block 37 can be supported by the fixed magnetic block 384 during high-speed rotation, providing pressure to the side cover 35 without affecting its rotation, thus allowing the side cover 35 to undergo a small degree of deformation.

[0075] Specifically, such as Figure 2 As shown, the outer wall of the side cover 35 is provided with multiple strip-shaped holes, and slots for accommodating grinding blocks 36 are provided at the intervals of the strip-shaped holes.

[0076] By setting strip-shaped perforations, the side cover 35 can be connected to the outside, and the part of the outer cover with the slotted opening forms a weak point, which is very easy to undergo small deformations. At the same time, it can facilitate the even ejection of water from the internal sponge during the polishing process.

[0077] The slot is located on the outer side wall of the side cover 35, close to the moving magnet 37. The magnetism of the moving magnet 37 can attract the grinding block 36 to this location. At the same time, when the slot is not deformed, its inner wall can be interference-fitted with the module. After the slot is deformed, the module can slide out more easily.

[0078] The inner wall of the side cover 35 can optionally be annularly fitted with a sponge ring, with the sponge ring positioned at the strip-shaped perforation. The sponge ring is self-supporting, allowing it to adhere to the inner wall of the side cover 35, and can hold water. During movement, the two wheel assemblies 20 and the side cover 35 can move at low speeds. During high-speed rotation in polishing, the water in the sponge can be splashed out to assist in the polishing operation.

[0079] Working principle: When this solution is in use, firstly, two electromagnets 33 are energized in the preset current direction, so that the two electromagnets 33 form a repulsive force. Under the action of the repulsive force, the two electromagnets 33 carry the cooperating seat 32 and the slide 31 away from the slide. The slide shaft 311 of the slide 31 slides at the four corners of the motor 11. The cooperating seat 32 and the right pressure seat 312 simultaneously move with the corresponding sliding sleeve 34 and squeeze the two wheel frames 21 to come closer, so that its multiple hollow column wheels 23 and two inclined guide seats 22 are pressed. When the inclined guide seats 22 are under pressure, its two inclined guide seats 22 deflect the slide 31 on both sides, so that its hollow column wheels 23 are squeezed in the inclined direction, keeping its expansion more uniform, until the rubber hollow column wheels 23 contact the inner wall of the pipe.

[0080] Then the motor 11 starts, and the motor 11 drives the drive shaft 12 to rotate, which in turn drives the wheel assembly 20 on the drive shaft 12 to rotate. At the same time, the drive shaft 12 drives the transmission shaft 17 to reverse through the gear set, so that the two wheel assemblies 20 reverse in the contact with the pipe wall and offset part of the torsional force, so that they can move forward and backward on the inner wall of the pipe.

[0081] During the movement, the detector 40 makes elastic contact with the inner wall of the pipe and performs roughness detection on the inner wall of the pipe in a linear trajectory as the whole moves.

[0082] When an abnormal roughness section is detected, polishing repair can be selected. By reversing the current direction of one of the electromagnets 33, the magnetic field direction changes, and the two electromagnets 33 become attracted to each other. Then, the cooperating seat 32 and the left pressure seat 313 move closer together, while the right pressure seat 312 and the cooperating seat 32 pull the wheel frame 21, causing the hollow column wheel 23 to be stretched slightly. At this time, the hollow column wheel 23 does not contact the pipe wall. As the two side covers 35 move closer, the moving magnetic block 37 of the side cover 35 and the fixed magnetic block 384 on the fixed magnetic seat 38 repel each other and squeeze each other. Under the pressure, the strip-shaped hole in the middle section of the side cover 35 expands slightly outward, causing the slot to loosen.

[0083] Under the pressure of the two side covers 35, the two symmetrical fixed magnets are displaced by a small amplitude, so that they are positioned and slid by the sliding pin 383 and the through groove 382, ​​and the metal sheet 385 is kept stable. After the metal sheet 385 is bent, it is pressed against the tube wall to keep it in position.

[0084] Subsequently, the motor 11 changes from low-speed rotation to high-speed rotation. As the two side covers 35 rotate at high speed, the grinding block 36 is subjected to centrifugal force and loosely engages with the slot, causing it to be thrown out partially and adhere to the inner wall of the pipe. With the action of gravity and centrifugal force of the high-speed rotating grinding block 36, the grinding block 36 polishes and grinds the inner wall of the pipe, while the metal sheet 385 maintains torsional support.

[0085] As the grinding ends, the rotation speed gradually decreases. Under the magnetic force of the moving magnetic block 37 on one side of the side cover 35, the grinding block 36 can be attracted into the slot. As the rotation speed decreases to a certain threshold, the grinding block 36 no longer throws out. Then the current of the electromagnet 33 can be reduced to reduce the squeezing pressure of the side cover 35, so that the slot can re-fit the grinding block 36. At the same time, the fixed magnetic seat 38 is reset and released from positioning.

[0086] After the above repairs are completed, the device can be moved to the detection state. During use, the energized slip ring 50 maintains a continuous power supply through the cable.

[0087] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A galvanized pipe inspection device, comprising a drive assembly (10) and a plurality of detectors (40) mounted thereon, and a slip ring (50) providing power to the entire device, wherein the drive assembly (10) has wheel assemblies (20) driving at both ends, characterized in that, Also includes: A magnetically controlled switching assembly (30) that changes the shape of the switching wheel assembly (20); The drive assembly (10) includes a motor (11) and a gear set driven at one end thereon, and the output ends of the motor (11) and the gear set are respectively equipped with a drive shaft (12) and a transmission shaft (17) that are in opposite directions. Two wheel assemblies (20) are mounted on the drive shaft (12) and the transmission shaft (17), respectively, and include two wheel carriers (21) and a plurality of hollow column wheels (23) rotating therebetween. The magnetic control switching assembly (30) includes a carriage (31) and a cooperating seat (32) that are brought closer or moved away by the magnetic force of a set of electromagnets (33). Each side of the carriage (31) and the cooperating seat (32) is provided with a side cover (35) fixed to the corresponding wheel frame (21). Each side of the two side covers (35) is fixed with a moving magnetic block (37). The assembly also includes a fixed magnetic seat (38) that is supported by the repulsive force of the two moving magnetic blocks (37). When the two electromagnets (33) repel each other, the carriage (31) and the cooperating seat (32) move away from each other and squeeze the two wheel frames (21) closer together, causing the hollow column wheel (23) to expand and contact the tube wall. The motor (11) drives the shaft (12) and the transmission shaft (17) through the gear set to slowly rotate the two wheel body assemblies (20) and move the whole in the tube. When the two electromagnets (33) attract each other, the slide (31) and the cooperating seat (32) approach each other and pull the two wheel frames (21) away, so that the hollow column wheel (23) is stretched away from the tube wall. The two side covers (35) approach and squeeze the fixed magnetic seat (38). The fixed magnetic seat (38) expands and clamps the tube wall, and the reaction side covers (35) expand and fit against the tube wall. The motor (11) drives the two side covers (35) to rotate through the gear set, drive the shaft (12) and the transmission shaft (17), and grinds the tube wall with the support of the fixed magnetic seat (38).

2. The galvanized pipe testing device according to claim 1, characterized in that, The gear set includes a gear disk (13) fixed at the opposite ends of the drive shaft (12) and the transmission shaft (17), and the opposite surfaces of the two gear disks (13) are meshed with a number of transmission gears (14). The motor (11) is fixed with a gear frame (15) for rotating the transmission gears (14), and a shaft frame (16) for rotating support of the transmission shaft (17) is fixed on one side of the gear frame (15).

3. The galvanized pipe testing device according to claim 2, characterized in that, The drive shaft (12) is the rotor shaft of the motor (11), and the detector (40) is fixed on the motor (11).

4. The galvanized pipe testing device according to claim 1, characterized in that, The wheel assembly (20) also includes two inclined guide seats (22) with two wheel frames (21) fixed to each other. The inclined surface of the inclined guide seat (22) is consistent with the inclination of the hollow column wheel (23). The inclined guide seat (22) and the wheel frame (21) are slidably disposed on the surface of the adapter sleeve (24). The adapter sleeve (24) is interference-fitted on the drive shaft (12) or transmission shaft (17) after being limited by the nut. The inclined guide seat (22) and the wheel frame (21) on the same side are fixed to each other.

5. The galvanized pipe testing device according to claim 1, characterized in that, The slide (31) includes a left pressure seat (313) symmetrically mounted with an electromagnet (33) on the cooperating seat (32), and four sliding shafts (311) that slide through the four corners of the motor (11) are fixed on the left pressure seat (313), and the other end of the four sliding shafts (311) is fixed with a right pressure seat (312).

6. The galvanized pipe testing device according to claim 5, characterized in that, The inner walls of the cooperating seat (32) and the right pressure seat (312) are rotatably connected to a sliding sleeve (34). The sliding sleeve (34) is splinedly connected to the surface of the adapter sleeve (24), and the side cover (35) is fixed to one end of the corresponding sliding sleeve (34).

7. The galvanized pipe testing device according to claim 1, characterized in that, The fixed magnet base (38) includes a fixed block (381) fixed on the motor (11), and fixed magnet blocks (384) are symmetrically arranged on both sides of the fixed block (381). Sliding pins (383) are fixed on the opposite surfaces of the two fixed magnet blocks (384). A through groove (382) for limiting the sliding of the two sliding pins (383) is opened on the fixed block (381). A metal sheet (385) attached to one side of the fixed block (381) is fixed on the opposite surfaces of the two fixed magnet blocks (384).

8. The galvanized pipe testing device according to claim 7, characterized in that, The fixed magnetic block (384) has the same magnetic pole as the corresponding moving magnetic block (37) on the same side.

9. A galvanized pipe testing device according to claim 1, characterized in that, The outer side wall of the side cover (35) is provided with a plurality of strip-shaped holes, and slots for accommodating grinding blocks (36) are provided at the intervals of the strip-shaped holes.

10. A method for detecting and repairing galvanized pipes, using a galvanized pipe detection device according to any one of claims 1-9, characterized in that, Including the following methods: During testing; The electromagnet (33) generates a repulsive force when energized, driving the cooperating seat (32) and the slide (31) to move away and causing the wheel frame (21) to move closer, so that the hollow column wheel (23) expands evenly and fits against the inner wall of the pipe. The start motor (11) drives the drive shaft (12) and the transmission shaft (17) to rotate in opposite directions, driving the two wheel assemblies (20) to rotate in opposite directions while in contact with the pipe wall, so as to realize the stable movement of the device in the pipeline; During the movement, the detector (40) contacts the inner wall of the pipe and performs roughness detection; During repair; When an abnormal section is detected, the current direction of the electromagnet (33) is adjusted to make them attract each other, which drives the wheel frame (21) away to retract the hollow column wheel (23). At the same time, the side cover (35) and the fixed magnetic base (38) are magnetically matched for positioning. The high-speed rotation of the motor (11) drives the side cover (35) to rotate, and the grinding block (36) unfolds under the action of centrifugal force to polish and repair the abnormal section of the pipe wall; After the repair is completed, the rotation speed is reduced, the grinding block (36) is reset and re-embedded in the slot, the current of the electromagnet (33) is reduced, the side cover (35) and the fixed magnetic seat (38) are released from positioning, and the device returns to the detection state to continue the detection operation.

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