Fluorescent magnetic powder inspection equipment for inner and outer surfaces of pipe end of steel pipe

Abstract

The invention discloses fluorescent magnetic powder inspection equipment for the inner surface and the outer surface of the pipe end of a steel pipe, and relates to the technical field of pipeline inspection equipment.The fluorescent magnetic powder inspection equipment comprises a balance weight base, a bottom supporting base arranged on the balance weight base, a fixed base and a movable base, and the bottom supporting base is movably arranged in the long edge direction of the balance weight base; the fixed seat and the movable seat are located on the two axial sides of the bottom supporting support respectively, the fixed seat is provided with a first fixing piece, the movable seat is provided with a second fixing piece, and the balance weight base is provided with a driving assembly for driving the movable seat to move. The device further comprises a magnetizing device, a fluorescent magnetic powder spraying device and a flaw detection assembly, the fluorescent magnetic powder spraying device comprises a storage box for storing magnetic suspension, a liquid supply pipe and nozzles, the nozzles are arranged on mounting pipes of the fixed seat and the movable seat, and the mounting pipes rotate around the central axis of the steel pipe. The invention has advantages.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline detection equipment, and particularly relates to a fluorescent magnetic powder detection equipment for the inner and outer surfaces of a steel pipe end. BACKGROUND

[0002] Magnetic powder detection is a widely known non-destructive inspection method, which is specially used for detecting small defects existing on the surface and near surface of a magnetic material. This technology plays a crucial role in guaranteeing the quality and safety of industrial products, especially metal components. The basic principle is that when a magnetic body to be detected is subjected to magnetization, the magnetic force lines will penetrate the material inside.

[0003] Specifically, the magnetic powder detection technology utilizes the following physical phenomenon: if a checked body composed of a magnetic body is magnetized, when there are defects (in an extended state) existing on the surface or near the surface of the checked body that can block the magnetic force lines, these defects will force the magnetic force lines to be distorted around them and leak to the surface space of the checked body at the defects, thereby forming a so-called "leakage magnetic field" above the defects. By applying fine magnetic particles (i.e. magnetic powder) to the surface of the detected object, the magnetic powder will be attracted to the defect area by the leakage magnetic field and form clear visible magnetic marks. The operator can accurately determine the location, shape and approximate size of the defects by observing these magnetic marks, and then evaluate the integrity of the material.

[0004] The magnetic powder detection technology has particularly important application value in the quality control of steel pipes. As a key material widely used in the fields of petroleum, natural gas, construction, mechanical manufacturing, etc., the internal and external small defects of the steel pipe may cause serious accidents or affect its service life during use. Therefore, ensuring the non-destructive detection quality of the steel pipe, especially the efficiency and accuracy of the magnetic powder detection, is crucial for guaranteeing the engineering safety and product performance.

[0005] However, in the traditional steel pipe magnetic powder detection equipment, a series of inherent limitations significantly restrict the detection efficiency and accuracy. One of the main problems is that the existing equipment generally lacks efficient and flexible adjustment mechanisms. When it is necessary to continuously detect steel pipes of different lengths and specifications, the operator often needs to spend a lot of time to manually adjust the position and parameters of the detection platform. Such time-consuming and labor-intensive adjustment not only reduces the overall detection throughput, which cannot meet the demand for efficiency of modern production lines, but also due to the error of manual operation, may cause the steel pipe to be not accurately positioned, thereby affecting the detection effect, and even causing missed detection or misjudgment.

[0006] On the other hand, the steel pipe needs to maintain a high degree of stability and precise positioning during the detection process to ensure the reliability of the magnetic powder detection result. However, traditional clamping devices often perform poorly in terms of efficiency and stability. They are not only not flexible enough when clamping steel pipes of different diameters, but also during the magnetization and detection process, the steel pipe may be slightly displaced, vibrated or even slipped due to insufficient clamping force or design defects. This unstable state will directly damage the accuracy of the detection, may cause uneven distribution of magnetic powder, affect defect identification, and even require repeated detection, further reducing work efficiency and increasing operating costs, posing a serious challenge to the overall detection quality. SUMMARY

[0007] The present application provides a fluorescent magnetic powder detection equipment for the inner and outer surfaces of the pipe end of a steel pipe, which can quickly and firmly clamp the steel pipe, significantly shortening the preparation time before detection.

[0008] The present application provides a fluorescent magnetic powder detection equipment for the inner and outer surfaces of the pipe end of a steel pipe, which adopts the following technical solution: A fluorescent magnetic powder detection equipment for the inner and outer surfaces of the pipe end of a steel pipe, comprising a counterweight base, a bottom supporting seat arranged on the counterweight base, a fixed seat and a moving seat, the bottom supporting seat is movably arranged along the long edge direction of the counterweight base, the fixed seat and the moving seat are respectively located on the two sides of the axial direction of the bottom supporting seat, the fixed seat is provided with a first fixing member, the moving seat is provided with a second fixing member, and the counterweight base is provided with a driving assembly for driving the displacement of the moving seat. It also includes a magnetizing device, a fluorescent magnetic powder spraying device and a detection assembly, the fluorescent magnetic powder spraying device includes a storage tank for storing magnetic suspension, a liquid supply pipe and a nozzle, the nozzle is arranged on the mounting pipe of the fixed seat and the moving seat, and the mounting pipe rotates around the central axis of the steel pipe.

[0009] Preferably, the upper surface of the bottom supporting seat is provided with an arc-shaped concave part, and the surface of the arc-shaped concave part is covered with an elastic shock-absorbing pad.

[0010] Preferably, the bottom supporting seat is slidably connected with the driving sliding block at the bottom of the bottom supporting seat through the guide rail on the counterweight base, the driving sliding block is internally provided with a sliding bearing, and the counterweight base is provided with a lead screw assembly for driving the displacement of the driving sliding block.

[0011] Preferably, the driving sliding block is internally provided with an electric push rod, the output end of the electric push rod is connected with the bottom of the bottom supporting seat, and is used for adjusting the position of the bottom supporting seat in the vertical direction.

[0012] Preferably, the first and second fixing members each comprise a positioning disc, a strip-shaped slot and an adjusting block, the radial surface of the positioning disc is provided with a plurality of strip-shaped slots, the adjusting block is slidably arranged in the strip-shaped slot, the surface of the adjusting block is provided with a cross-shaped positioning member, and the center of the positioning disc is provided with a driving member for driving the adjusting block to slide synchronously.

[0013] Preferably, the driving member comprises a driving motor, the output end of the driving motor is connected with a rotating block, the rotating block is hingedly connected with the adjusting block through a bent connecting rod, and the two ends of the bent connecting rod are respectively hingedly connected with the rotating block and the adjusting block.

[0014] Preferably, the mounting pipe of the fixing base is driven to rotate through a gear and tooth ring transmission structure, and the mounting pipe of the moving base is directly driven to rotate through a coaxially connected second driving motor output shaft.

[0015] Preferably, the outer surface of the mounting pipe is provided with a connecting rod, the connecting rod is hingedly connected with the mounting pipe through an electric telescopic rod, the end of the connecting rod is hingedly connected with an integrated rod, the integrated rod is provided with a silica gel scraping strip, the surface of the silica gel scraping strip is provided with a powder collecting groove and an independent installation groove in which a spray head is arranged.

[0016] Preferably, an arc-shaped blocking strip is arranged between the powder collecting groove and the installation groove of the silica gel scraping strip, and the arc-shaped blocking strip can be rotated with the mounting pipe or deformed to close the groove opening of the powder collecting groove or the installation groove under the pressure of the spray head.

[0017] Preferably, the bottom of the moving base is provided with a guide wheel, the driving assembly is a gas cylinder, the output end of the gas cylinder is connected with the moving base, and the counterweight base is provided with a guide rail matched with the guide wheel.

[0018] In summary, the present application has the following beneficial effects: 1. To ensure the detection efficiency, the device ingeniously utilizes the bottom supporting seat, the fixing base and the moving base on the counterweight base to realize accurate adjustment and positioning of the steel pipe in the longitudinal direction. On this basis, through the synergistic effect of the first and second fixing members, the steel pipe can be quickly and firmly clamped, which significantly shortens the preparation time before detection, thereby greatly improving the efficiency of the overall flaw detection work.

[0019] 2. Through the rotation of the electric telescopic rod and the mounting pipe, an automatic and continuous magnetic powder removal process is realized, which greatly improves the cleaning efficiency and reduces the dependence on manual operation. The dry scraping method is adopted, and the magnetic powder is directly scraped off from the surface of the steel pipe, which is convenient for centralized collection and recycling. This is different from high-pressure water flushing, which can dilute and disperse the magnetic powder, thereby greatly improving the recycling and reuse efficiency of the magnetic powder. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure schematic diagram of the fluorescent magnetic particle flaw detection equipment in the embodiment; Figure 2 is a schematic diagram of the connecting structure between the guide rail and the driving slider in the embodiment; Figure 3 is a schematic diagram of the connecting structure between the moving seat and the cylinder in the embodiment; Figure 4 is a schematic diagram of the overall structure of the driving member in the embodiment; Figure 5 is a schematic diagram of the connecting structure between the mounting pipe and the gear ring in the embodiment; Figure 6 is a schematic diagram of the connecting structure between the mounting pipe and the gear ring in the embodiment; Figure 4 is a schematic diagram of the connecting structure between the mounting pipe and the gear ring in the embodiment; Mark explanation: 1, counterweight base; 2, magnetizing device; 3, control case; 4, fluorescent magnetic powder spraying device; 5, liquid crystal display; 6, control panel; 7, bottom support; 8, inner recess; 9, shock pad; 10, guide rail; 11, driving slider; 12, fixed seat; 13, moving seat; 14, first fixed part; 1401, positioning disc; 1402, strip-shaped groove; 1403, adjusting block; 1404, positioning part; 1405, driving member; 140501, rotating block; 140502, bent connecting rod; 15, second fixed part; 16, guide wheel; 17, cylinder; 18, mounting pipe; 19, nozzle; 20, gear; 21, gear ring; 22, connecting rod; 23, electric telescopic rod; 24, integrated rod; 25, silica gel scraping strip; 26, powder collecting groove; 27, installation groove; 28, arc-shaped blocking strip. DETAILED DESCRIPTION

[0021] It is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the protection scope of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content. EMBODIMENT

[0022] The application discloses a fluorescent magnetic powder flaw detection equipment for the inner and outer surfaces of a steel pipe end, as shown in the figure, comprising a counterweight base 1, wherein the counterweight base 1 is provided with a magnetizing device 2, a control case 3 and a fluorescent magnetic powder spraying device 4, wherein the fluorescent magnetic powder spraying device 4 is used for spraying magnetic suspension during a zero-voltage interval, the control case 3 is provided with a flaw detection assembly, a liquid crystal display 5 and a control panel 6, wherein the flaw detection assembly is used for detecting the flaw detection condition of the inner and outer surfaces of the steel pipe end, and the control panel 6 is used for controlling and displaying on the liquid crystal display 5. Figure 1

[0023] Figure 1 ​​As shown, the fluorescent magnetic powder detection equipment magnetizes the inner and outer surfaces of the pipe end of the steel pipe through the magnetizing device 2. When the steel pipe is magnetized, a magnetic field is generated inside the material. If there are defects on the surface or near the surface of the steel pipe, these defects will hinder the passage of magnetic lines, causing the magnetic lines to overflow from the material surface at the defect, forming a magnetic leakage field.

[0024] As shown in the Figure 1 , the fluorescent magnetic powder spraying device 4 in the equipment will spray magnetic suspension containing fluorescent magnetic powder during the zero voltage interval. These fluorescent magnetic powders themselves have magnetism, which will be attracted by the magnetic leakage at the defect under the action of the magnetic leakage field, and gather at the edge of the defect.

[0025] As shown in the Figure 1 , after the completion of the magnetic powder spraying and gathering, the equipment observes the surface of the steel pipe under the ultraviolet (black light) irradiation of the detection assembly. Because the magnetic powder gathered at the defect has fluorescent properties, they will emit bright fluorescence under ultraviolet light irradiation, clearly showing the location, shape and size of the defect.

[0026] As shown in the Figure 1 , the detection assembly will display the detected fluorescent indication information on the liquid crystal display screen 5 after processing through the endoscope on the detection assembly and the control cabinet 3. The operator can control and observe through the control panel 6.

[0027] As shown in the Figure 1 and Figure 2 , the upper surface of the counterweight base 1 is fixedly installed with a left and right movable bottom supporting seat 7, and the upper surface of the bottom supporting seat 7 is formed with an arc-shaped concave part 8. The middle part of the pipe is placed in the arc-shaped concave part 8 of the bottom supporting seat 7. The steel pipe is cylindrical, and the arc-shaped concave part 8 formed on the bottom supporting seat 7 has an arc that matches or is greater than the arc of the pipe. The combination of concave and convex makes the steel pipe lie stably in the seat, forming a tight contact surface. This utilizes the principle of shape matching to ensure that the pipe can be firmly held and is not easy to roll or tilt.

[0028] As shown in the Figure 1 and Figure 2 , the left and right movable bottom supporting seat 7 means that the seat can be transversely displaced on the base through a sliding or rolling mechanism. This allows the operator to easily adjust the precise position of the pipe without moving the entire pipe or support device.

[0029] As shown in the Figure 1 and Figure 2As shown, the arc-shaped inner recess 8 surface of the bottom support 7 is provided with a shock-absorbing pad 9 made of rubber, polyurethane or other elastomer materials. The surface molecular structure of these materials has a higher static and dynamic friction coefficient when in contact with the steel surface than metal-to-metal contact. Moreover, the elastic material will deform slightly when under pressure, better fitting the microscopic unevenness of the steel pipe surface, forming more effective contact points, thereby generating greater frictional resistance, effectively preventing the steel pipe from sliding.

[0030] As shown in Figure 1 and Figure 2 , in addition, the shock-absorbing pad 9 material has viscoelasticity. When the steel pipe is subjected to vibration or impact, the shock-absorbing pad 9 will absorb these mechanical energy and convert a portion of the mechanical energy into heat energy through internal molecular friction and deformation, rather than reflecting the energy back to the steel pipe or support structure. The shock-absorbing pad 9 provides a buffer layer that can extend the action time of the force and reduce the peak value of the impact force under sudden impact, thereby acting as a buffer. At the same time, its internal damping characteristics help to quickly attenuate vibrations and prevent the steel pipe or support system from resonating or transmitting external vibrations to the steel pipe.

[0031] As shown in Figure 1 and Figure 2 , the upper surface of the counterweight base 1 is symmetrically provided with two guide rails 10 along its own long direction, and the drive slider 11 is provided between the guide rail 10 and the bottom support 7. The guide rail 10 provides a predetermined and accurate linear path, eliminating other degrees of freedom and ensuring the singularity and accuracy of movement.

[0032] As shown in Figure 1 and Figure 2 , the drive slider 11 is the interface between the bottom support 7 and the guide rail 10. The inside of the drive slider 11 is provided with low-friction elements such as ball bearings, rollers or sliding bearings, allowing the bottom support 7 to smoothly and labor-savingly slide on the guide rail 10.

[0033] As shown in Figure 1 and Figure 2 , and the upper surface of the counterweight base 1 is fixedly installed with a lead screw assembly for driving the drive slider 11. The thrust or tension generated by the lead screw assembly is transmitted to the bottom support 7 through the drive slider 11, thereby realizing the accurate movement of the bottom support 7 along the guide rail 10.

[0034] The counterweight base 1 serves as a stable foundation, the guide rail 10 provides an accurate linear path and bearing capacity, and the drive slider 11 serves as an actuator, converting the driving force into controlled movement of the bottom support 7 along the guide rail 10. The three work together to form a stable, efficient and controllable linear positioning and movement system.

[0035] AsFigure 2 And Figure 3 As shown in

[0036] As shown in Figure 2 And Figure 3 As shown in

[0037] As shown in Figure 2 And Figure 3 As shown in

[0038] As shown in Figure 3 And Figure 4 As shown in

[0039] As shown in Figure 3 And Figure 4As shown, the first and second fixtures 14 and 15 have the same structure, specifically, the first fixture includes a positioning disc 1401, the radial surface of which is provided with a plurality of strip-shaped grooves 1402, the central axis of which passes through the center point of the positioning disc 1401, and the inside of the strip-shaped grooves 1402 is provided with an adjustable block 1403 that can slide synchronously, the surface of the adjustable block 1403 is provided with a cross-shaped positioning member 1404, and the positioning disc 1401 provides a basic platform, and the strip-shaped grooves 1402 provided on the radial surface thereof are the tracks for the sliding of the adjustable block 1403. Since the central axis of the strip-shaped grooves 1402 passes through the center point of the positioning disc 1401, it means that the adjustable block 1403 can move radially inward or outward. When the adjustable block 1403 slides synchronously inward, it will simultaneously contact the steel pipe from multiple points and automatically align the center thereof with the center of the positioning disc 1401.

[0040] As shown in Figure 3 and Figure 4 , the cross-shaped structure of the positioning member 1404 is used to tightly fit the outer surface of the circular steel pipe. It can provide multi-point contact, thereby stably holding the steel pipe and preventing its movement or rotation in the radial and circumferential directions. By driving the adjustable block 1403 to move synchronously to the center, the cross-shaped positioning member 1404 will gradually tighten, thereby firmly clamping the steel pipe of different diameters at the center position of the positioning disc 1401.

[0041] As shown in Figure 3 and Figure 4 , no matter the size of the diameter of the steel pipe, as long as it is placed therein and tightened, it can automatically align the center of the steel pipe with the central axis of the device. This greatly simplifies the operation, improves the positioning accuracy, and reduces the time and labor required for manual centering. Therefore, through the sliding of the adjustable block 1403 in the radial groove, this structure can easily adapt to steel pipes of different diameters without the need to frequently replace clamps or additional adapters, thereby improving the versatility and flexibility of the device.

[0042] As shown in Figure 4 and Figure 4As shown, the first fixed block further comprises a driving member 1405 for driving the adjusting blocks 1403 to synchronously slide inside the strip-shaped groove 1402, specifically, the driving member 1405 comprises a driving motor arranged at the center position of the positioning disc 1401, the output end of the driving motor is connected with a rotating block 140501, the rotating block 140501 and the adjusting blocks 1403 are connected through a bent connecting rod 140502, the two ends of the bent connecting rod 140502 are respectively hingedly arranged between the rotating block 140501 and the adjusting blocks 1403, when the motor rotates, the rotating block 140501 also rotates. With the rotation of the rotating block 140501, each bent connecting rod 140502 will decompose the circumferential motion of the rotating block 140501 under the rotation force of the rotating block 140501 and the guiding effect of the adjusting blocks 1403 in the strip-shaped groove 1402, to generate a push-pull force on the adjusting blocks 1403. Since all the adjusting blocks 1403 are hingedly connected with the same central rotating block 140501 through independent bent connecting rods 140502, and the adjusting blocks 1403 are constrained to move linearly in the strip-shaped groove 1402, therefore, each rotation of the rotating block 140501 will cause all the connected adjusting blocks 1403 to move linearly at the same pace and direction. The design of the central rotating component driving multiple radial or offset connecting rods ensures that all the adjusting blocks 1403 can simultaneously, equidistantly and equally slide inside the strip-shaped groove 1402, realizing synchronous adjustment.

[0043] As shown in Figure 4 The fixed seat 12 and the moving seat 13 are both provided with a mounting pipe 18 that can be reversely rotated around the central axis of the positioning disc 1401, the fluorescent magnetic powder spraying device 4 comprises a storage tank for storing magnetic suspension, the output end of the storage tank is connected with a liquid supply pipe, the liquid supply pipe is arranged inside the mounting pipe 18 and is connected with a nozzle 19, and the nozzle 19 on the fixed seat 12 faces the outer ring surface of the pipe shaft end, and the nozzle 19 on the moving seat 13 faces the inner ring surface of the pipe shaft end, through the rotation of the mounting pipe 18, the fixed seat 12 and the moving seat 13 are respectively sprayed with magnetic suspension at both ends of the steel pipe.

[0044] As shown in Figure 5 The magnetic suspension is stored in the storage tank and is transported to the nozzle 19 through the liquid supply pipe, ensuring the continuity and stability of the spraying process. Through the rotation of the mounting pipe 18, the nozzle 19 can perform 360-degree scanning spraying around the axis of the steel pipe, thereby realizing full-circumferential coverage of the inner and outer ring surfaces of the steel pipe end.

[0045] As shown in Figure 6As shown, the magnetic suspension can be sprayed on the inner and outer surfaces of the steel pipe end simultaneously or sequentially. Combined with the rotation of the installation pipe 18, it ensures that every point of the inner and outer rings of the steel pipe end can be evenly covered, avoiding the possible omissions or dead angles of manual spraying, which is crucial for the accuracy of magnetic powder inspection.

[0046] As shown in Figure 5 and Figure 4 specifically, the first drive motor is provided on the fixed seat 12, the output end of the first drive motor is connected with the gear 20, one side of the gear 20 is engaged with the gear ring 21, the gear ring 21 is coaxially arranged between the positioning disc 1401, and the installation pipe 18 is fixedly connected with the gear ring 21, so as to realize the driving effect of the installation pipe 18 on the fixed seat 12.

[0047] As shown in Figure 5 the second drive motor is provided on the moving seat 13, the output end of the second drive motor is connected with the output shaft, the output shaft penetrates through the through hole at the center position of the rotating shaft and is coaxially connected with the installation pipe 18. To achieve the driving effect of the installation pipe 18 on the moving seat 13.

[0048] Again, it is worth mentioning that the liquid supply pipe adopts a bent connecting pipe, and the forward and reverse rotation of the installation pipe 18 does not affect the normal liquid pouring of the liquid supply pipe.

[0049] As shown in Figure 4 and Figure 5 further, the outer surface of the installation pipe 18 is provided with a plurality of parallel connecting rods 22, the middle part of any connecting rod 22 is hinged with the installation pipe 18 through the electric telescopic rod 23, the two ends of the electric telescopic rod 23 are respectively hinged with the connecting rod 22 and the installation pipe 18, one end of the connecting rod 22 is hingedly arranged on the outer surface of the installation pipe 18, the other end of the connecting rod 22 is hingedly connected with the integrated rod 24, and the integrated rod 24 is provided with a silica gel scraping strip 25.

[0050] As shown in Figure 4 and Figure 5 by the telescopic action of the electric telescopic rod 23, the angle of the connecting rod 22 relative to the installation pipe 18 can be accurately changed. When the electric telescopic rod 23 is telescoped to the preset position, the angle of the connecting rod 22 is adjusted, so that the silica gel scraping strip 25 on the integrated rod 24 connected to the other end of the connecting rod 22 can accurately and closely contact the inner and outer surface of the steel pipe to be cleaned. This design ensures that the scraping strip can effectively and uniformly cover and act on the target area, whether it is the inner ring or the outer ring.

[0051] As shown in Figure 4 and Figure 5As shown, once the silicone scraper 25 adheres to the surface of the steel pipe, the entire mounting tube 18 will rotate in a circular motion. As the mounting tube 18 rotates, the silicone scraper 25 also moves along the inner and outer surfaces of the steel pipe, thereby physically removing the residual magnetic powder adhering to the steel pipe.

[0052] like Figure 4 and Figure 6 As shown, the use of a silicone scraper 25 is an important consideration in the design. Silicone material is relatively soft, with good elasticity and wear resistance, effectively removing magnetic powder while minimizing scratches or secondary contamination (such as residue) on the steel pipe surface, thus protecting product quality. This magnetic powder removal device has significant advantages over traditional high-pressure water rinsing or manual wiping methods. like Figure 4 and Figure 6 As shown, the silicone scraper 25 is equipped with a powder collection groove 26 for collecting magnetic powder. The silicone scraper 25 also has a mounting groove 27, which is independently located from the powder collection groove 26. The nozzle is located inside the mounting groove 27. This design is a highly efficient solution that integrates multiple functions into one component. It cleverly combines scraping, powder collection, and spraying functions, and its structural separation ensures that they can work together or operate independently.

[0053] like Figure 4 and Figure 6 As shown, specifically, the silicone scraper 25, as the main working component, is soft and elastic, allowing it to closely conform to the surface being scraped and effectively remove the adhering substances from the surface.

[0054] like Figure 4 and Figure 6 As shown, when the scraper removes material, the powder collection trough 26 can immediately receive and guide the scraped powder. This is typically achieved through the shape, depth, and position of the trough relative to the edge of the scraper, ensuring that the powder is effectively captured and collected, preventing it from scattering or redepositing.

[0055] like Figure 4 and Figure 6 As shown, the mounting slot 27 is specifically designed to accommodate the nozzle, meaning the nozzle is protectively integrated within the scraper structure. The mounting slot 27 is independently positioned from the powder collection slot 26; this means the nozzle is not disturbed by the ongoing powder collection process or mixed with the collected powder when spraying liquids, gases, or other media. This independence ensures spraying accuracy and prevents contamination. The nozzle can perform spraying operations on the scraper itself, the scraped surface, or the collected powder simultaneously with or at specific stages of scraping.

[0056] like Figure 4 and Figure 6As shown, the arc-shaped blocking strip 28 is formed between the powder collecting groove 26 and the accommodating groove 27 of the silica gel scraping strip 25, and the output of the nozzle 19 coincides with the section of the arc-shaped blocking strip 28. Specifically, when the scraping operation is needed, the arc-shaped blocking strip 28 on the silica gel scraping strip 25 will be deformed towards the accommodating groove 27 under the action of the circumferential rotation of the silica gel scraping strip 25. This deformation enables the arc-shaped blocking strip 28 to accurately extrude the slot opening of the accommodating groove 27 to the closed state. Since the nozzle 19 is arranged in the accommodating groove 27, the closed slot opening plays a role of physical shielding and protection, avoiding the nozzle 19 from being scratched, impacted or contaminated during the scraping process.

[0057] As shown in ​ and ​ When the nozzle 19 sprays the magnetic suspension, the high-speed impact force generated by the nozzle 19 will act on the arc-shaped blocking strip 28. At this time, the arc-shaped blocking strip 28 will be deformed towards the powder collecting groove 26 under the action of the impact force. This deformation also enables the arc-shaped blocking strip 28 to extrude the slot opening of the powder collecting groove 26 to the closed state. By closing the powder collecting groove 26, the magnetic powder collected in the powder collecting groove 26 can be effectively prevented from being scattered or taken away by the magnetic suspension sprayed by the nozzle 19, thereby protecting the collected material.

[0058] As shown in ​ and ​ The physical damage, wear or contamination of the nozzle 19 during the scraping process is effectively prevented, the service life of the nozzle 19 is significantly prolonged, and the maintenance cost is reduced. The integrity and collection efficiency of the material are ensured, unnecessary waste and secondary cleaning are avoided, and the magnetic powder or other particulate matter collected during the spraying operation is prevented from being scattered by the airflow or liquid.

[0059] Working principle: Before detecting the steel pipe, first place the steel pipe in the arc-shaped inner recess 8 of the bottom support 7, and adjust the steel pipe to the appropriate height by the electric push rod. Utilize the screw rod assembly to move the bottom support 7 towards the fixed seat 12 until one end of the steel pipe is located inside the first fixing part 14, and realize the positioning and fixing of the one end of the steel pipe by the first fixing part 14.

[0060] Subsequently, the gas cylinder 17 is used as a driving source to accurately control the sliding distance of the moving seat 13 on the guide rail 10, thereby changing the distance between the moving seat 13 and the fixed seat 12 until the second fixing part 15 on the moving seat 13 positions and fixes the other end of the steel pipe.

[0061] In the detection process, first, the magnetization device 2 magnetizes the inner and outer surface of the pipe end of the steel pipe. When the steel pipe is magnetized, a magnetic field is generated inside the material. Then the fluorescent magnetic powder spraying device 4 sprays the magnetic suspension containing fluorescent magnetic powder during the zero voltage interval. These fluorescent magnetic powders themselves have magnetism, and under the action of the magnetic leakage field, they will be attracted by the magnetic leakage at the defect and gathered at the edge of the defect.

[0062] Specifically, by the telescopic action of the electric telescopic rod 23, the angle of the connecting rod 22 relative to the mounting pipe 18 can be accurately changed. And adjust the distance between the nozzle 19 and the inner and outer surface of the steel pipe, through the circumferential rotation of the mounting pipe 18, realize the function of uniform spraying of magnetic suspension.

[0063] After the completion of magnetic powder spraying and gathering, the equipment observes the surface of the steel pipe under the ultraviolet (black light) irradiation of the flaw detection assembly. And the detected fluorescent indication information is processed by the endoscope on the flaw detection assembly and the control case 3, and displayed on the liquid crystal display 5. The operator can control and observe through the control panel 6.

[0064] Finally, through the telescopic action of the electric telescopic rod 23, the silica gel scraping strip 25 is attached to the surface of the steel pipe, and the entire mounting pipe 18 rotates circumferentially. Accompanying the rotation of the mounting pipe 18, the silica gel scraping strip 25 also moves on the inner and outer surface of the steel pipe, thereby physically scraping off the residual magnetic powder attached to the steel pipe.

[0065] The above are the preferred embodiments of the present application, not limited to the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fluorescent magnetic particle inspection device for the inner and outer surfaces of steel pipe ends, characterized in that, The utility model relates to a kind of magnetic particle penetrant testing device, including counterweight base (1), the bottom support (7) of setting in the counterweight base (1), fixed seat (12) and mobile seat (13), the bottom support (7) is movably arranged along the long side direction of counterweight base (1), fixed seat (12) and mobile seat (13) are located in the axial two sides of bottom support (7) respectively, the fixed seat (12) is equipped with first fixing part (14), the mobile seat (13) is equipped with second fixing part (15), the counterweight base (1) is equipped with the drive component of driving the displacement of mobile seat (13); It also includes magnetizing device (2), fluorescent magnetic powder spraying device (4) and flaw detection assembly, the fluorescent magnetic powder spraying device (4) includes storage tank for storing magnetic suspension, liquid supply pipe and nozzle (19), the nozzle (19) is arranged on the mounting pipe (18) of fixed seat (12) and mobile seat (13), the mounting pipe (18) rotates around the center axis of steel pipe.

2. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 1, characterized by, The upper surface of the bottom support (7) is provided with an arc-shaped recess (8), and the surface of the arc-shaped recess (8) is covered with an elastic shock pad (9).

3. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 2, characterized by The bottom support (7) is slidably connected to the drive sliding block (11) at the bottom of the bottom support (7) through the guide rail (10) on the counterweight base (1), the drive sliding block (11) is internally provided with a sliding bearing, and the counterweight base (1) is provided with a lead screw assembly for driving the displacement of the drive sliding block (11).

4. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 3, characterized by The drive sliding block (11) is internally provided with an electric push rod, the output end of the electric push rod is connected to the bottom of the bottom support (7), and is used for adjusting the position of the bottom support (7) in the vertical direction.

5. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 1, characterized by The first fixing part (14) and the second fixing part (15) each include a positioning disc (1401), a strip-shaped groove (1402), and an adjusting block (1403), the radial surface of the positioning disc (1401) is provided with a plurality of strip-shaped grooves (1402), the adjusting block (1403) is slidably arranged in the strip-shaped groove (1402), the surface of the adjusting block (1403) is provided with a cross-shaped positioning member (1404), and the center of the positioning disc (1401) is provided with a driving member (1405) for driving the synchronous sliding of the adjusting block (1403).

6. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 5, characterized by The driving member (1405) includes a driving motor, the output end of the driving motor is connected to a rotating block (140501), the rotating block (140501) is hingedly connected to the adjusting block (1403) through a bent connecting rod (140502), and the two ends of the bent connecting rod (140502) are respectively hingedly connected to the rotating block (140501) and the adjusting block (1403).

7. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 1, characterized by The mounting pipe (18) of the fixed seat (12) is driven to rotate through gear (20) gear ring (21) transmission structure, and the mounting pipe (18) of the mobile seat (13) is directly driven to rotate through coaxially connected second driving motor output shaft.

8. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 1, characterized by The outer surface of the installation pipe (18) is provided with a connecting rod (22), the connecting rod (22) is hinged with the installation pipe (18) through an electric telescopic rod (23), the end of the connecting rod (22) is hinged with an integrated rod (24), the integrated rod (24) is provided with a silica gel scraping strip (25), the surface of the silica gel scraping strip (25) is provided with a powder collecting groove (26) and an independent installation groove (27) for installing a spray head.

9. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 8, characterized by The powder collecting groove (26) and the installation groove (27) of the silica gel scraping strip (25) are provided with an arc-shaped blocking strip (28), the arc-shaped blocking strip (28) can rotate with the installation pipe (18) or be deformed to close the groove of the powder collecting groove (26) or the installation groove (27) under the pressure of the spray head.

10. The apparatus for fluorescent magnetic powder inspection of the inner and outer surfaces of the pipe end of a steel pipe according to claim 3, characterized by The bottom of the moving seat (13) is provided with a guide wheel (16), the driving assembly is a gas cylinder (17), the output end of the gas cylinder (17) is connected with the moving seat (13), and the counterweight base (1) is provided with a guide rail (10) matched with the guide wheel (16).

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