A conveying type pipe inspection apparatus

Abstract

The application relates to the field of metal flaw detection, in particular to a conveying type pipe flaw detection equipment, which comprises a rack, a conveying belt installed on the rack, the rack is provided with a magnetization flaw detection station and an observation station, the conveying belt can drive the pipes to pass through the magnetization flaw detection station and the observation station in sequence; a magnetization flaw detection mechanism, which comprises a magnetization coil connected to the rack, the magnetization coil is used for magnetizing the pipes moving to the magnetization flaw detection station along the conveying belt; the rack is further connected with a magnetic powder pipe, the magnetic powder pipe is connected with a magnetic powder spray head used for spraying the magnetic powder to the surface of the steel pipe; an observation mechanism, which comprises a plurality of industrial cameras, the industrial cameras are used for shooting and recording the surface defect magnetic traces of the pipes, the observation rack is further connected with a driving element and a marking rack, the marking rack is connected with a plurality of spray pens, the driving element can drive the marking rack to move to the direction of the pipes in the observation station, and the spray pens can spray and draw marks on the surface of the pipes. The application has the effect of detecting the surface defects of the metal pipes by automatically spraying the magnetic powder to the surface of the pipes and accelerating the inspection speed.

Description

Technical Field

[0001] This application relates to the field of metal flaw detection, and in particular to a flaw detection device for conveying pipe fittings. Background Technology

[0002] Metal flaw detection is a method of inspecting internal defects (such as hidden cracks, sand holes, impurities, etc.) in metal parts using flaw detectors. It involves using specific equipment and methods such as magnetism, X-rays, gamma rays, and ultrasound to inspect and detect internal defects in metal materials. Magnetic particle testing is a common metal flaw detection method in industrial production, suitable for detecting surface and near-surface defects such as cracks and holes. This method involves applying a magnetic field to the metal surface and sprinkling magnetic powder; the accumulation of the magnetic powder at the defect reveals its location and shape. Magnetic particle testing can quickly and accurately detect defects in metal materials, and it is simple to operate and relatively inexpensive.

[0003] Currently, in the process of magnetic particle testing of metal pipe fittings, the metal pipe fitting is usually fixed and then magnetized using an energized coil. After magnetization, the energized coil is removed, and then magnetic powder is sprayed onto the surface of the metal pipe fitting manually or with auxiliary mechanical equipment. After the magnetic powder stabilizes, the magnetic traces on its surface are observed. After the metal pipe fitting is magnetized, due to the existence of discontinuities, the magnetic lines of force on and near the surface of the workpiece are locally distorted, resulting in a leakage magnetic field. This field attracts the magnetic powder applied to the workpiece surface and forms a visible magnetic trace under appropriate lighting, thus showing the location, size, shape, and severity of the discontinuities.

[0004] However, it is obvious that the existing metal flaw detection process is not continuous. Workers need to fix and disassemble the metal pipes multiple times during the flaw detection process. When applied to large-scale metal pipe production lines, the inspection volume is large, which will lead to excessive workload for workers or require a large investment of manpower to complete the metal flaw detection. The degree of automation is low, which means that the entire inspection process requires manual connection of each step, which consumes a lot of human resources and has low inspection efficiency. Summary of the Invention

[0005] In order to accelerate the inspection speed by automatically spraying magnetic powder onto the surface of pipe fittings to detect surface defects, this application provides a conveyor-type pipe fitting flaw detection device.

[0006] The technical solution of the conveying pipe fitting flaw detection equipment provided in this application is as follows: A conveyor-type pipe fitting flaw detection device, comprising, The frame is equipped with a conveyor belt, and the frame is provided with a magnetic flaw detection station and an observation station. The conveyor belt can drive the pipes to pass through the magnetic flaw detection station and the observation station in sequence. A magnetization flaw detection mechanism is provided at a magnetization flaw detection station on a frame, including a magnetization coil connected to the frame, the magnetization coil being used to magnetize the pipe fittings that move with the conveyor belt to the magnetization flaw detection station; the frame is also connected to a magnetic powder tube, the magnetic powder tube being connected to a plurality of magnetic powder nozzles for spraying magnetic powder onto the surface of the steel pipe located at the magnetization flaw detection station. An observation mechanism, set at an observation station on a machine frame, includes an observation frame connected to the machine frame and multiple industrial cameras mounted on the observation frame. The industrial cameras are used to capture and record magnetic traces of defects on the surface of the pipe fittings. The observation frame is also connected to a drive unit and a marking frame. The drive unit is connected to the observation frame, and the marking frame is connected to multiple spray pens. The drive unit can drive the marking frame to move towards the pipe fittings at the observation station, and the spray pens can spray marks on the surface of the pipe fittings.

[0007] By adopting the above technical solution, the user moves the pipe to be inspected onto a conveyor belt. The conveyor belt then pulls the pipe sequentially through the magnetization inspection station and the observation station. When the pipe passes through the magnetization inspection station, the user energizes the magnetization coil, which magnetizes the pipe at the inspection station. After magnetization, multiple powder spraying nozzles spray magnetic powder onto the magnetized pipe. If defects exist on the surface of the pipe after magnetization, the discontinuity causes local distortion of the magnetic lines of force on and near the surface of the workpiece, generating a leakage magnetic field. This field attracts the magnetic powder applied to the workpiece surface, forming a visible magnetic mark under suitable lighting. The conveyor belt then continues to move the pipe to the observation station on the frame. Multiple industrial cameras capture and identify the magnetic mark on the surface of the pipe, and then a spray gun paints markings at the corresponding positions to indicate the defects on the pipe surface.

[0008] Optionally, the magnetization flaw detection mechanism further includes a power component connected to the frame. The power component is connected to a mandrel, which is coaxially arranged with the magnetization coil. The power component can drive the mandrel to move into the pipe of the magnetization flaw detection station of the frame so that the mandrel is coaxially arranged with the pipe of the magnetization flaw detection station of the magnetization frame.

[0009] By adopting the above technical solution, when the user uses the power component, the mandrel is driven to move into the pipe of the magnetization flaw detection station on the frame, so that the mandrel and the pipe of the magnetization flaw detection station are set coaxially. The mandrel concentrates and guides the magnetic field formed by the magnetization coil, making the magnetic flux more concentrated and enhancing the strength of the magnetic field formed by the magnetization coil. At the same time, it suppresses the interference of external factors on the magnetic field and makes the magnetic field more stable.

[0010] Optionally, a guide frame is connected to the frame near its own magnetization flaw detection station. The guide frame has a guide groove, and the length direction of the guide groove is set in the same direction as the length direction of the mandrel. The mandrel slides in the guide groove of the guide frame, and the power component can drive the mandrel to slide along the length direction of the guide groove of the guide frame.

[0011] By adopting the above technical solution, when the user uses the power component, the mandrel is driven to move along the length of the guide groove of the guide frame into the pipe of the magnetization flaw detection station of the frame. The guide groove of the guide frame plays a role in constraining the movement direction of the mandrel, so that the mandrel inserted into the pipe is kept coaxial with the pipe, thereby further improving the stability of the magnetic field.

[0012] Optionally, the observation mechanism further includes a lifting cylinder, which is connected to the machine frame at its own observation station position. The length direction of the piston rod of the lifting cylinder is oriented towards the marking frame. The piston rod of the lifting cylinder is connected to a lifting frame. The conveyor belt can move the pipe at the observation station position of the machine frame into the lifting frame. The lifting cylinder can move the pipe at the observation station position of the machine frame towards the marking frame through the lifting frame.

[0013] By adopting the above technical solution, when the conveyor belt moves the pipe to the position of the lifting cylinder, the pipe moves into the lifting frame. The piston rod of the lifting cylinder extends and moves the lifting frame toward the marking frame, thereby moving the pipe in the lifting frame toward the marking frame, shortening the distance between the two. On the one hand, this makes it easier for the industrial camera to identify and photograph the magnetic marks on the surface of the pipe, and on the other hand, it makes it easier for the inkjet pen to spray marks on the surface of the pipe to indicate defects on the surface of the pipe.

[0014] Optionally, the observation mechanism further includes a transmission component and rotating disks respectively disposed on both sides of the frame. The two rotating disks are coaxially arranged and rotatably connected to the frame. The transmission component can drive the two rotating disks to rotate around their own axis. Each rotating disk is slidably equipped with a clamping rod, which is coaxially arranged with the rotating disk. The lifting cylinder can move the pipe at the observation station of the frame to the position between the two clamping rods through the lifting frame. The clamping rod can slide along its own length in the rotating disk. The rotation of the rotating disk drives the clamping rod connected to it to rotate. Clamping cylinders are disposed on both sides of the frame. The clamping cylinders are located on the side of the two rotating disks that are far apart from each other. The piston rod of the clamping cylinder is rotatably connected to the clamping rod located on the same side of the frame. The two clamping cylinders can push the two clamping rods to move towards each other to clamp the pipe.

[0015] By adopting the above technical solution, when the pipe is moved to the observation position of the frame by the conveyor belt, the user activates two clamping cylinders, causing the piston rods of the two clamping cylinders to extend, thereby causing the two clamping rods to slide in the corresponding rotating disks. The two clamping rods move towards each other, clamping the pipe together. Then, the user uses an industrial camera to photograph and identify the magnetic mark on the side of the pipe closest to itself, and marks it with an inkjet pen. Then, the transmission component drives the two rotating disks to rotate, and the rotation of the rotating disks causes the clamping rods connected to them to rotate at a certain angle, thereby causing the pipe to rotate through a certain angle. Then, the above observation and inkjet printing process is repeated until the entire outer circumference of the pipe is identified and recorded.

[0016] Optionally, the frame is also provided with a demagnetization station, which is located on the side of the observation frame away from the magnetization coil. A demagnetization frame is provided at the demagnetization station position of the frame, and a demagnetization coil is slidably mounted on the demagnetization frame. The conveyor belt can drive the pipe to move to the demagnetization station position of the frame, and the demagnetization coil can slide to the outside of the pipe at the demagnetization station of the frame to demagnetize the pipe.

[0017] By adopting the above technical solution, when using the machine, the user moves the pipe to the demagnetizing station of the frame via a conveyor belt. The demagnetizing station applies a magnetic field in the opposite direction to the magnetizing coil to the pipe, thereby eliminating the magnetism of the pipe and achieving demagnetization of the metal pipe.

[0018] Optionally, a loading mechanism and a unloading mechanism are respectively provided at both ends of the frame. Both the loading mechanism and the unloading mechanism include a support frame and a conveyor belt. Each conveyor belt is installed on a corresponding support frame. The conveyor belt of the loading mechanism is used to move the pipe closer to the conveyor belt, and the conveyor belt of the unloading mechanism is used to move the pipe away from the conveyor belt. A receiving mechanism is provided between each conveyor belt and the conveyor belt. The receiving mechanism is used to move untested pipes from the conveyor belt of the loading mechanism to the conveyor belt and to move tested pipes from the conveyor belt to the conveyor belt of the unloading mechanism. The receiving mechanism includes a receiving frame connected to the frame and a conveying claw. The conveying claw is movably connected to the receiving frame and is used to grab the pipe and move the pipe.

[0019] By adopting the above technical solution, when using the device, the user places the pipes at equal intervals on the conveyor belt of the feeding mechanism. The rotation of the conveyor belt drives the pipes to move closer to the conveyor belt. When the pipes move to a position close to the conveyor belt, the conveyor claws on the receiving frame grab the pipes and drive them to move closer to the conveyor belt. Then the conveyor claws open and place the pipes on the conveyor belt of the frame. After the conveyor belt carries the workpiece to complete the magnetization flaw detection, the pipes move with the conveyor belt to a position below the conveyor claws of the receiving mechanism at the other end. The conveyor claws grab the pipes and move them along the receiving frame to a position above the conveyor belt of the unloading station. Then the conveyor claws open and place the pipes on the conveyor belt of the unloading station. The conveyor belt of the unloading station drives the pipes to a position away from the conveyor belt.

[0020] Optionally, each of the support frames is equipped with a receiving cylinder near the conveyor belt. The piston rod of the receiving cylinder is connected to a lifting frame. Each of the conveyor belts can drive the pipe placed on it to move into the lifting frame. The piston rod of the receiving cylinder drives the lifting frame to move, which can drive the pipe in the lifting frame to move towards the conveyor claw.

[0021] By adopting the above technical solution, when the pipe is moved to a position close to the conveyor belt along the feeding station, the pipe moves into the lifting frame connected to the receiving cylinder at that position. Then, the receiving cylinder lifts the pipe through the lifting frame, making it easy for the conveyor claw to grab the pipe. Conversely, when the pipe moves to a position close to the unloading mechanism along the conveyor belt, the conveyor claw grabs the pipe and moves it into the lifting frame of the receiving cylinder at the position close to the unloading station. Then, the receiving cylinder retracts, allowing the pipe to gradually fall onto the conveyor belt, preventing the pipe from falling directly and causing collision damage.

[0022] Optionally, the outer circumferential surface of the conveyor belt is connected to multiple conveyor frames, each conveyor frame is arranged in a circumferential array along the conveyor belt, each conveyor frame moves with the conveyor belt, and the pipe can be set inside the conveyor frame and move with the conveyor frame and the conveyor belt.

[0023] By adopting the above technical solution, when the user uses the conveyor racks arrayed on the outer periphery of the conveyor belt, the pipes can be placed in the multiple conveyor racks on the outer periphery of the conveyor belt in sequence. The multiple conveyor racks play a role in restraining the movement of the pipes, allowing the pipes to fall off from the conveyor racks, facilitating the movement of the pipes by the conveyor belt and ensuring the distance between two adjacent pipes.

[0024] In summary, this application includes at least one of the following beneficial technical effects: The design of the frame, conveyor belt, conveyor frame, magnetization flaw detection mechanism, magnetization coil, magnetic powder tube, magnetic powder nozzle, observation mechanism, observation frame, industrial camera, drive unit, marking frame, spray gun, demagnetizing frame, and demagnetizing coil involves placing the pipes to be inspected sequentially on the conveyor belt. The conveyor belt then carries the pipes past the magnetization flaw detection mechanism, where the magnetization coil magnetizes the pipes. After magnetization, the magnetic powder nozzle sprays the magnetic powder from the magnetic powder tube onto the surface of the pipes, creating magnetic traces at the defect locations. The conveyor belt then moves the pipes to the observation frame, where the industrial camera captures and identifies the locations of the magnetic traces on the pipe surface. The spray gun then marks the defect locations on the pipe surface. After inspection, the conveyor belt moves the pipes to the demagnetizing frame and demagnetizing coil, where the demagnetizing coil demagnetizes the pipes, thus completing the pipe inspection. The entire inspection process is highly automated, effectively improving inspection efficiency, reducing manual operation, and increasing work speed. The design of the rotating disk, clamping rods, clamping cylinders, clamping columns, transmission components, lifting cylinders, and lifting frame involves a conveyor belt moving the pipe to the lifting frame position. The lifting cylinders then move the pipe closer to the observation frame via the lifting frame. Subsequently, two clamping cylinders push two clamping rods to move closer to each other, thereby clamping the pipe together through the two clamping columns. Then, the transmission components drive the rotating disk to rotate, causing the pipe to rotate. This allows the outer circumference of the pipe to pass under the industrial camera, enabling the industrial camera to photograph and identify the outer circumference of the pipe. The design incorporates a loading mechanism, unloading mechanism, support frame, conveyor belt, conveyor frame, receiving mechanism, receiving frame, conveyor claw, conveyor motor, conveyor rack, and receiving cylinder. Users place pipe fittings sequentially onto the conveyor frame of the loading mechanism's conveyor belt, causing the fittings to move sequentially to the receiving frame. The receiving cylinder then lifts each fitting individually, and the conveyor claw picks up the fitting and transports it onto the conveyor belt. After magnetization testing, the other end of the conveyor claw picks up the tested fitting and moves it to the conveyor frame of the unloading station's conveyor belt. The unloading station's conveyor belt then moves the inspected fitting out, improving automation efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the feeding mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of the feeding mechanism structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the magnetization flaw detection mechanism according to an embodiment of this application; Figure 5 This is a schematic diagram of the mandrel structure according to an embodiment of this application; Figure 6This is a schematic diagram of the observation mechanism structure according to an embodiment of this application; Figure 7 yes Figure 6 Enlarged view of section A.

[0026] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Conveyor belt; 11a. Conveyor frame; 2. Unloading mechanism; 21. Support frame; 22. Conveyor belt; 22a. Conveyor frame; 3. Loading mechanism; 4. Receiving mechanism; 41. Receiving cylinder; 41a. Lifting frame; 42. Receiving frame; 43. Conveying rack; 44. Conveying claw; 44a. Gripper; 44b. Gripper cylinder; 45. Conveying motor; 45a. Conveying gear; 46. Connecting frame; 5. Magnetic flaw detection mechanism; 51. Drive unit; 52. Magnetic coil 53. Magnetic powder tube; 53a. Magnetic powder nozzle; 54. Core rod; 55. Power component; 56. Guide frame; 56a. Guide groove; 6. Observation mechanism; 61. Observation frame; 62. Industrial camera; 62a. Fill light; 63. Drive component; 64. Marking frame; 64a. Airbrush; 65. Lifting cylinder; 65a. Lifting frame; 66. Rotary disk; 67. Transmission component; 68. Clamping rod; 68a. Clamping column head; 69. Clamping cylinder; 7. Demagnetizing frame; 71. Demagnetizing coil; 72. Demagnetizing cylinder. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0028] This application discloses a flaw detection device for conveyor pipe fittings, referring to... Figure 1The system includes a frame 1, with a conveyor belt 11 mounted on top. Multiple conveyor frames 11a are fixed to the outer circumference of the conveyor belt 11, arranged in a circumferential array along the conveyor belt 11. A stepper motor (not shown in the figure) is connected to the conveyor belt 11, which drives the conveyor belt 11 to move intermittently. A loading mechanism 3 and a unloading mechanism 2 are respectively located near both ends of the frame 1 along its length. The loading mechanism 3 transports pipe fittings onto the conveyor belt 11, while the unloading mechanism 2 transports the inspected pipe fittings away from the conveyor belt 11. A receiving mechanism 4 is located between the loading mechanism 3 and the unloading mechanism 2 and the frame 1. The receiving mechanism 4 is used to transfer the pipe fittings transported by the loading mechanism 3 onto the conveyor belt 11 for inspection and to transfer the inspected pipe fittings to the unloading mechanism 2. Between the feeding mechanism 3 and the unloading mechanism 2, the frame 1 is equipped with a magnetization flaw detection station, an observation station, and a demagnetization station. The conveyor belt 11 can carry the pipes transferred to the conveyor belt 11 by the feeding mechanism 3 and the receiving mechanism 4 through the magnetization flaw detection station, the observation station, and the demagnetization station in sequence. The magnetization flaw detection station of the frame 1 is equipped with a magnetization flaw detection mechanism 5, which is used to magnetize the pipes and spray magnetic powder. The magnetic powder forms magnetic traces at the defect locations on the surface of the pipes. The observation station of the frame 1 is equipped with an observation mechanism 6, which is used to photograph and identify the magnetic traces on the surface of the pipes and mark the defects on the surface of the pipes. The demagnetization station of the frame 1 is equipped with a demagnetization coil 71, which is used to eliminate the magnetic field formed by the magnetization of the pipes.

[0029] Reference Figures 1-3Both the feeding mechanism 3 and the unloading mechanism 2 include a support frame 21. A conveyor belt 22 is installed near the top of each support frame 21, and each conveyor belt 22 is connected to a stepper motor (not shown in the figure). The stepper motor (not shown in the figure) can drive the conveyor belt 22 to rotate intermittently. Multiple conveyor frames 22a are fixedly connected to the outer circumference of each conveyor belt 22. The multiple conveyor frames 22a are arranged in an array along the circumference of the conveyor belt 22, and the rotation of the conveyor belt 22 can move the conveyor frames 22a. Two receiving cylinders 41 are fixedly connected to each support frame 21 near the conveyor belt 11, and two identical receiving cylinders 41 are provided near both ends of the frame 1. A lifting frame 41a is fixedly connected to the piston rod of each receiving cylinder 41, and the length direction of the piston rod of the receiving cylinder 41 is vertically upward. When the piston rod of the receiving cylinder 41 retracts, the lifting frame 41a moves with the piston rod of the receiving cylinder 41 to a position below the conveyor belt 22. Each receiving mechanism 4 includes a receiving frame 42, which is fixedly connected to the frame 1. Each receiving frame 42 is fixedly connected to a conveying rack 43 near the top position, and the length direction of the conveying rack 43 is set along the length direction of the frame 1. Each receiving frame 42 is connected to two conveying claws 44. The two conveying claws 44 connected to the same receiving frame 42 form a group of conveying claws 44. Each group of conveying claws 44 is connected to a connecting frame 46. Each connecting frame 46 is connected to a conveying motor 45. Each connecting frame 46 is slidably connected to the receiving frame 42. The connecting frame 46 can slide on the receiving frame 42 along the length direction of the conveying rack 43. The output shaft of each conveying motor 45 is engaged with a conveying gear 45a. Each conveying gear 45a meshes with the conveying rack 43 connected to the same receiving frame 42. The rotation of the conveying motor 45 can drive the connecting frame 46 to move along the length direction of the conveying rack 43 through the meshing of the conveying gear 45a and the conveying rack 43, thereby driving the two conveying claws 44 in the same group to slide along the length direction of the conveying rack 43. Each conveying claw 44 consists of two grippers 44a and a gripper 44a cylinder disposed between them. The gripper 44a cylinder is a bidirectional cylinder. The two grippers 44a of the same conveying claw 44 are respectively fixedly connected to the piston rod of the corresponding gripper 44a cylinder. Each gripper 44a cylinder can drive the two grippers 44a to move towards each other, so that the two grippers 44a of the same conveying claw 44 jointly grip the metal pipe. Then, the conveying motor 45 drives the conveying gear 45a meshing with the conveying rack 43 to rotate, thereby driving the connecting frame 46, the two conveying claws 44 and the pipe gripped by the two conveying claws 44 to slide along the receiving frame 42.

[0030] When the user uses the device, the user places the pipe to be tested into the conveyor frame 22a on the conveyor belt 22 of the feeding mechanism 3 in sequence. The conveyor belt 22 moves toward the conveyor belt 11. When the pipe moves with the conveyor frame 22a to the two lifting frames 41a near the frame 1, the piston rods of the two receiving cylinders 41 extend synchronously and lift the pipe upward through the two lifting frames 41a. Then, two conveying claws 44 connected to the same receiving frame 42 grip the lifted pipe. The conveying cylinders of the corresponding conveying claws 44 drive the two grippers 44a to move towards each other, thereby clamping the pipe. Then, the conveying motor 45 rotates, driving the connecting frame 46, the two conveying claws 44, and the pipe gripped by the two conveying claws 44 to move towards the conveyor belt 11, so that the pipe moves to the lifting frame 41a connected to the two receiving cylinders 41 connected to the frame 1 near the feeding mechanism 3. Then, the retraction of the two receiving cylinders 41 connected to the frame 1 near the feeding mechanism 3 causes the pipe to slowly fall into the conveyor frame 11a on the conveyor belt 11. The receiving frame 42 and the conveyor frame 11a both serve to restrain the pipe and prevent it from falling off during the conveying process. The rotating conveyor belt 11 drives the conveyor frame 11a connected to it to move, thereby driving the conveyor frame 11a to pass through the magnetization flaw detection station, the observation station and the demagnetization station in sequence to complete the flaw detection of the pipe fitting. After the detection is completed, the piston rods of the two receiving cylinders 41 connected to the frame 1 near the unloading mechanism 2 lift the pipe fitting. Then, the conveying claw 44 set between the frame 1 and the unloading mechanism 2 moves it to the lifting frame 41a of the two receiving cylinders 41 connected to the conveyor frame 22a of the unloading mechanism 2, and transfers the pipe fitting into the conveyor frame 22a on the conveyor belt 22 of the unloading mechanism 2. The pipe fitting after the detection is completed is then transferred down, thereby improving the detection and processing efficiency of the pipe fitting.

[0031] Reference Figure 4 and Figure 5The magnetization flaw detection mechanism 5 includes two drive units 51 connected to the frame 1. Each drive unit 51 is connected to a magnetization coil 52. The drive unit 51 drives the magnetization coil 52 connected to it to move along the width direction of the conveyor belt 11. The drive unit 51 can drive the two magnetization coils 52 to move towards or away from each other. In this embodiment, the drive unit 51 is a cylinder. The two magnetization coils 52 are coaxially arranged, and the axis of the magnetization coils 52 is arranged along the width direction of the frame 1. The two drive units 51 can drive the two magnetization coils 52 to move towards or away from each other, so that the pipes at the magnetization flaw detection station on the frame 1 are respectively located within the two magnetization coils 52 at their two ends. The movement of the conveyor belt 11 can drive the conveyor frame 11a to move, thereby moving the pipes to the magnetization flaw detection station on the frame 1. The pipes at the magnetization flaw detection station are coaxially arranged with the magnetization coils 52. Two magnetic powder tubes 53 are fixedly connected to the frame 1 above the conveyor belt 11. The magnetic powder tubes 53 are used to transport and hold magnetic powder for testing pipe fittings. Each magnetic powder tube 53 is fixedly connected to multiple magnetic powder nozzles 53a near its bottom. The multiple magnetic powder nozzles 53a are arranged in an array along the axial direction of the magnetic powder tube 53. Each magnetic powder nozzle 53a is connected to the magnetic powder tube 53 to which it is connected. The magnetic powder nozzles 53a can spray magnetic powder onto the pipe fittings at the magnetization flaw detection station of the frame 1. Two mandrels 54 are also slidably connected to the frame 1 at the position corresponding to the magnetization coil 52. The two mandrels 54 are located on both sides of the frame 1. The axial direction of the mandrels 54 is arranged along the width direction of the frame 1. Each mandrel 54 is connected to a power component 55. The power component 55 is used to drive the mandrel 54 to slide along its own axial direction within the frame 1. In this embodiment, the power component 55 is a rodless cylinder. Two rodless cylinders drive two mandrels 54 to move towards each other until one end contacts the other. The mandrels 54 are coaxially arranged with the magnetizing coil 52 and with the pipe located at the magnetization inspection station. A guide frame 56 is fixedly connected to the frame 1 near each mandrel 54. Each guide frame 56 has a guide groove 56a at its bottom. The mandrel 54 is slidably connected to the guide groove 56a of the corresponding guide frame 56. The length direction of the guide groove 56a is aligned with the axis of the magnetizing coil 52. When the pipe moves to the magnetization inspection station of the frame 1 along with the conveyor belt 11 and the conveyor frame 11a, the two rodless cylinders drive the two mandrels 54 to move towards each other until one end contacts the other and they are coaxially arranged with the pipe. The pipe is then magnetized. The two mandrels 54 act as iron cores inside the pipe, further improving magnetization efficiency, enhancing the magnetization effect, and confining the magnetic field.

[0032] Reference Figure 4 and Figure 6The observation mechanism 6 includes an observation frame 61 fixedly connected to the frame 1 at its corresponding observation station position. The observation frame 61 is located above the conveyor belt 11. Multiple industrial cameras 62 are fixedly connected to the top of the observation frame 61, arranged in an array along the width of the frame 1, and vertically facing the conveyor belt 11. Supplementary lights 62a are also fixedly connected to both sides of the observation frame 61 corresponding to the industrial cameras 62. The supplementary lights 62a provide supplementary lighting for the industrial cameras 62 to capture and identify magnetic marks on the surface of the pipe fittings. A driving component 63 is also provided at the top of the observation frame 61. In this embodiment, the driving component 63 is exemplified by a cylinder arranged vertically. The cylinder is fixedly connected to the observation frame 61, and a marking frame 64 is fixedly connected to the piston rod of the cylinder. The marking frame 64 is slidably connected to the frame 1, and the piston rod of the cylinder is vertically facing the conveyor belt 11. The cylinder can drive the marking frame 64 to move closer to the conveyor belt 11. The marking frame 64 is fixedly connected to multiple spray guns 64a, which are arranged in an array along the length of the marking frame 64.

[0033] Reference Figure 4 , Figure 6 and Figure 7The observation mechanism 6 also includes two lifting cylinders 65, both of which are fixedly connected to the corresponding observation station positions on the frame 1. The piston rods of the lifting cylinders 65 are oriented along the length of the marking frame 64. The piston rods of the lifting cylinders 65 are connected to a lifting frame 65a. The conveyor belt 11 can move the pipe at the observation station position of the frame 1 into the lifting frame 65a. The lifting cylinders 65 can move the pipe at the observation station position of the frame 1 towards the marking frame 64 via the lifting frame 65a. The observation mechanism 6 also includes a transmission component 67 and rotating disks 66 respectively connected to both sides of the frame 1. The two rotating disks 66 are coaxially arranged. The transmission component 67 can drive the two rotating disks 66 to rotate around their own axis. In this embodiment, the transmission component 67 takes a motor and chain transmission mechanism as an example. The chain transmission mechanism is connected to the output shaft of the motor and the outside of the rotating disks 66 respectively. The rotation of the output shaft of the motor can drive the two rotating disks 66 to rotate via the transmission chain. Each rotating disk 66 is slidably equipped with a clamping rod 68, which is coaxially arranged with the rotating disk 66. The clamping rod 68 can slide along the axis of the rotating disk 66 to which it is connected. The rotation of the rotating disk 66 can drive the clamping rod 68 connected to it to rotate. Each of the two clamping rods 68 has a clamping head 68a fixedly connected to one end of each other. The two clamping heads 68a can be inserted into the pipes located near their ends at the observation position of the frame 1. Clamping cylinders 69 are fixedly connected to both sides of the frame 1. The clamping cylinders 69 are located on the side of the two rotating disks 66 that are far apart from each other. The piston rod of the clamping cylinder 69 is connected to the clamping rod 68 located on the same side of the frame 1. The two clamping cylinders 69 can push the clamping rods 68 connected to them to move towards each other and clamp the pipes located at the observation position of the frame 1 through the two clamping heads 68a, so that the two ends of the pipes are inserted into the two clamping heads 68a respectively. The transmission component 67 drives the two rotating disks 66 to rotate, thereby causing the pipe clamped between the two clamping heads 68a to rotate. The lifting cylinder 65 can move the pipe at the observation station of the frame 1 to the position between the two clamping rods 68 via the lifting frame. The clamping cylinder 69 pushes the two clamping rods 68 to slide towards each other along their own length in the rotating disk 66, so that the two clamping rods 68 clamp the pipe together through the two clamping heads 68a. The rotation of the rotating disk 66 drives the clamping rods 68 connected to it to rotate, thereby allowing the industrial camera 62 to photograph and identify the magnetic marks on the outer peripheral wall of the pipe. After the industrial camera 62 identifies the magnetic marks, the spray gun 64a sprays marks on the corresponding positions to facilitate subsequent processing.

[0034] Reference Figure 4 and Figure 6A demagnetizing frame 7 is installed at the demagnetizing station of the frame 1. Two demagnetizing coils 71 are slidably mounted on the demagnetizing frame 7. Each demagnetizing coil 71 is fixedly connected to a demagnetizing cylinder 72. The two demagnetizing cylinders 72 can drive the two demagnetizing coils 71 to move away from or towards each other. The two demagnetizing coils 71 are coaxially arranged. The conveyor belt 11 can drive the pipe to the demagnetizing station of the frame 1. Then, the two demagnetizing cylinders 72 drive the two demagnetizing coils 71 to move to a position close to each other. The pipe at the demagnetizing station of the frame 1 is coaxially arranged with the two demagnetizing coils 71. The demagnetizing coils 71 apply a magnetic field in the opposite direction to that of the magnetizing coil 52 to the pipe after magnetization and testing, thereby canceling the magnetic field generated after the pipe is magnetized, and thus demagnetizing the pipe after testing.

[0035] The implementation principle of the conveyor-type pipe flaw detection equipment in this application embodiment is as follows: The user places the pipes to be inspected sequentially on the conveyor frame 22a of the conveyor belt 22 of the feeding mechanism 3. The stepper motor (not shown in the figure) drives the conveyor belt 22 to move, thereby moving the pipes towards the conveyor belt 11. When the pipes move to the position of the receiving cylinder 41 and the lifting frame 41a connected to the support frame 21 of the feeding mechanism 3, the two receiving cylinders 41 of the same group lift the pipes together. Then, the conveying claw 44 grabs the pipes and transports them to the lifting frame 41a connected to the two receiving cylinders 41 near the feeding mechanism 3 on the frame 1. After that, the pipes are slowly placed onto the conveyor frame 11a of the conveyor belt 11 by the two receiving cylinders 41. The conveyor belt 11 drives the conveyor frame 11a and the pipes to pass sequentially through the magnetization flaw detection mechanism 5. The magnetization coil 52 magnetizes the pipes. After magnetization, the magnetic powder nozzle 53a sprays magnetic powder. Magnetic powder inside tube 53 is sprayed onto the surface of the tube, forming magnetic marks at the defect locations on the tube surface. Then, the conveyor belt 11 moves the tube to below the observation frame 61, where an industrial camera 62 captures and identifies the locations of the magnetic marks on the tube surface. Afterward, a spray gun 64a sprays marks on the defect locations to indicate the positions of the defects on the tube surface. After the inspection is completed, the conveyor belt 11 moves the tube to the demagnetizing frame 7 and the demagnetizing coil 71, where the demagnetizing coil 71 demagnetizes the tube, thus completing the inspection of the tube. The entire inspection process is highly automated, effectively improving inspection efficiency, reducing manual operation, and increasing work speed.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A conveying pipe fitting flaw detection device, characterized in that: include, The frame (1) is equipped with a conveyor belt (11). The frame (1) is provided with a magnetic flaw detection station and an observation station. The conveyor belt (11) can drive the pipes to pass through the magnetic flaw detection station and the observation station in sequence. A magnetization flaw detection mechanism (5) is set in the magnetization flaw detection station of the frame (1), including a magnetization coil (52) connected to the frame (1), the magnetization coil (52) being used to magnetize the pipe fittings that move to the magnetization flaw detection station with the conveyor belt (11); the frame (1) is also connected to a magnetic powder tube (53), the magnetic powder tube (53) being connected to a plurality of magnetic powder nozzles (53a) for spraying magnetic powder onto the surface of the steel pipe located at the magnetization flaw detection station; The observation mechanism (6) is set at the observation station of the frame (1), including an observation frame (61) connected to the frame (1) and multiple industrial cameras (62) installed on the observation frame (61). The industrial cameras (62) are used to capture and record magnetic traces of defects on the surface of the pipe fittings. The observation frame (61) is also connected to a drive unit (63) and a marking frame (64). The drive unit (63) is connected to the observation frame (61), and the marking frame (64) is connected to multiple spray pens (64a). The drive unit (63) can drive the marking frame (64) to move towards the pipe fittings at the observation station, and the spray pens (64a) can spray marks on the surface of the pipe fittings.

2. The conveying pipe fitting flaw detection equipment according to claim 1, characterized in that: The magnetization flaw detection mechanism (5) also includes a power component (55) connected to the frame (1). The power component (55) is connected to a mandrel (54). The mandrel (54) is coaxially arranged with the magnetization coil (52). The power component (55) can drive the mandrel (54) to move into the pipe of the magnetization flaw detection station of the frame (1) so that the mandrel (54) is coaxially arranged with the pipe of the magnetization flaw detection station of the magnetization frame (1).

3. The conveying pipe fitting flaw detection equipment according to claim 2, characterized in that: The frame (1) is connected to a guide frame (56) near its own magnetization flaw detection station. The guide frame (56) has a guide groove (56a). The length direction of the guide groove (56a) of the guide frame (56) is set in the same direction as the length direction of the mandrel (54). The mandrel (54) slides in the guide groove (56a) of the guide frame (56). The power component (55) can drive the mandrel (54) to slide along the length direction of the guide groove (56a) of the guide frame (56).

4. The conveying pipe fitting flaw detection equipment according to claim 1, characterized in that: The observation mechanism (6) also includes a lifting cylinder (65), which is connected to the machine frame (1) at its own observation station position. The length direction of the piston rod of the lifting cylinder (65) is set towards the marking frame (64). The piston rod of the lifting cylinder (65) is connected to a lifting frame (65a). The conveyor belt (11) can drive the pipe at the observation station position of the machine frame (1) into the lifting frame (65a). The lifting cylinder (65) can drive the pipe at the observation station of the machine frame (1) to move towards the marking frame (64) through the lifting frame (65a).

5. The conveying pipe fitting flaw detection equipment according to claim 4, characterized in that: The observation mechanism (6) further includes a transmission component (67) and rotating disks (66) respectively disposed on both sides of the frame (1). The two rotating disks (66) are coaxially arranged and rotatably connected to the frame (1). The transmission component (67) can drive the two rotating disks (66) to rotate around their own axis. Each rotating disk (66) is slidably provided with a clamping rod (68). The clamping rod (68) is coaxially arranged with the rotating disk (66). The lifting cylinder (65) can drive the pipe of the observation station of the frame (1) to move to the two clamping rods through the lifting frame. At the position between (68), the clamping rod (68) can slide along its own length in the rotating disk (66), and the rotation of the rotating disk (66) can drive the clamping rod (68) connected to it to rotate; clamping cylinders (69) are provided on both sides of the frame (1), and the clamping cylinders (69) are located on the side away from each other of the two rotating disks (66). The piston rod of the clamping cylinder (69) is connected to the clamping rod (68) located on the same side of the frame (1). The two clamping cylinders (69) can push the two clamping rods (68) to move towards each other to clamp the pipe.

6. The conveying pipe fitting flaw detection equipment according to claim 1, characterized in that: The frame (1) is also provided with a demagnetization station, which is located on the side of the observation frame (61) away from the magnetization coil (52). A demagnetization frame (7) is provided at the demagnetization station of the frame (1), and a demagnetization coil (71) is slidably mounted on the demagnetization frame (7). The conveyor belt (11) can drive the pipe to move to the demagnetization station of the frame (1), and the demagnetization coil (71) can slide to the outside of the pipe at the demagnetization station of the frame (1) to demagnetize the pipe.

7. The conveying pipe fitting flaw detection equipment according to claim 1, characterized in that: The frame (1) is provided with a loading mechanism (3) and a unloading mechanism (2) at both ends. Both the loading mechanism (3) and the unloading mechanism (2) include a support frame (21) and a conveyor belt (22). Each conveyor belt (22) is installed on the corresponding support frame (21). The conveyor belt (22) of the loading mechanism (3) is used to drive the pipe to move closer to the conveyor belt (11), and the conveyor belt (22) of the unloading mechanism (2) is used to drive the pipe to move away from the conveyor belt (11). Each conveyor belt (22) is connected to the conveyor belt (11). A receiving mechanism (4) is provided at each position between the belts (11). The receiving mechanism (4) is used to move untested pipes from the conveyor belt (22) of the loading mechanism (3) to the conveyor belt (11) and to move the tested pipes from the conveyor belt (11) to the conveyor belt (22) of the unloading mechanism (2). The receiving mechanism (4) includes a receiving frame (42) connected to the frame (1) and a conveying claw (44). The conveying claw (44) is movably connected to the receiving frame (42) and is used to grab the pipes and drive the pipes to move.

8. The conveying pipe fitting flaw detection equipment according to claim 7, characterized in that: Each of the support frames (21) is equipped with a receiving cylinder (41) near the conveyor belt (22). The piston rod of the receiving cylinder (41) is connected to a lifting frame (41a). Each of the conveyor belts (22) can drive the pipe placed on it to move into the lifting frame (41a). The piston rod of the receiving cylinder (41) drives the lifting frame (41a) to move, which can drive the pipe in the lifting frame (41a) to move towards the conveying claw (44).

9. The conveying pipe fitting flaw detection equipment according to claim 1, characterized in that: The outer circumferential surface of the conveyor belt (11) is connected to a plurality of conveyor frames (11a). Each conveyor frame (11a) is arranged in a circumferential array along the conveyor belt (11). Each conveyor frame (11a) moves with the conveyor belt (11). The pipe can be set in the conveyor frame (11a) and move with the conveyor frame (11a) and the conveyor belt (11).

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