Mobile magnetic powder inspection device and magnetic powder inspection method

Abstract

The invention relates to the technical field of flaw detection devices, in particular to a movable magnetic powder flaw detection device and a magnetic powder flaw detection method.The movable magnetic powder flaw detection device comprises flaw detection equipment and a protective frame, and the protective frame comprises universal wheels, a protective box, a sliding door, a lifting table and a damping plate; when a workpiece is subjected to flaw detection, the protection box is pushed, under the action of the universal wheels, sliding on the ground is achieved, the protection box is moved to the position where the workpiece needs to be subjected to flaw detection, the sliding door is pulled, the protection box is opened, the lifting table is controlled to operate to jack the flaw detection equipment till the flaw detection equipment is ejected out of the protection box, at the moment, the surface of the workpiece is cleaned, and then the flaw detection equipment is placed on the workpiece for flaw detection. The flaw detection device can be directly moved to the position of the workpiece to carry out field detection on the workpiece, so that the time for carrying the workpiece back and forth for multiple times is saved, and the flaw detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flaw detection devices, and in particular to a mobile magnetic powder flaw detection device and a magnetic powder flaw detection method. Background Art

[0002] In industrial production, many workpieces to be inspected are large in size and heavy in weight, making it difficult to transport them to fixed flaw detection equipment for inspection, such as large castings and forgings, multi-layer high-pressure vessels, bridges, pipelines, etc.

[0003] Magnetic particle inspection is an important nondestructive testing method that uses the interaction between the leakage magnetic field at workpiece defects and magnetic particles to detect defects. When defects (such as cracks, slag inclusions, and hairline patterns) exist on the surface or near the surface of steel products, the magnetic field at these discontinuities will be distorted after magnetization due to the difference in magnetic permeability between the defects and the steel matrix. This generates a leakage magnetic field on the workpiece surface, which attracts magnetic particles and forms a magnetic particle accumulation at the defect, i.e., a magnetic trace. The location and shape of the defect can be determined by observing the magnetic trace. With the development of industry, the quality requirements for metal materials and components are becoming increasingly higher. Magnetic particle inspection technology is also constantly developing and improving to improve the sensitivity, accuracy, and efficiency of detection.

[0004] However, some inspection sites may be in the wild or in places without fixed power supply. When inspecting large workpieces or multiple scattered workpieces, traditional fixed magnetic particle inspection equipment needs to move the workpieces to the equipment one by one, which is inefficient. Summary of the Invention

[0005] The purpose of the present invention is to provide a mobile magnetic particle flaw detection device and a magnetic particle flaw detection method, aiming to solve the problem that existing fixed magnetic particle flaw detection equipment requires the workpiece to be moved and is inefficient.

[0006] To achieve the above-mentioned objectives, in the first aspect, the present invention provides a mobile magnetic particle flaw detection device, including flaw detection equipment and a protective frame, the protective frame including universal wheels, a protective box, a sliding door, a lifting platform and a shock-absorbing plate; the protective box is fixedly connected to the universal wheel and is located at the top of the universal wheel, the sliding door is slidably connected to the protective box and is located at the top of the protective box, the lifting platform is assembled in the protective box, the shock-absorbing plate is assembled on one side of the lifting platform, and the flaw detection equipment is assembled on the top of the shock-absorbing plate.

[0007] The lifting platform includes a support plate, a lifting frame and a guide rod. The lifting frame is assembled in the protective box, the support plate is assembled on the top of the lifting frame, and the guide rod is fixedly connected to the protective box and passes through the support plate and the shock-absorbing plate.

[0008] In which, the lifting frame includes a dual-axis motor, a screw, a sliding block and a rotating rod. The dual-axis motor is fixedly connected to the protective box and is located inside the protective box. The screw is fixedly connected to the output end of the dual-axis motor and is located on both sides of the dual-axis motor. The sliding block is threadedly connected to the screw and is slidably connected to the protective box and is located on one side of the screw. The rotating rod is assembled between the sliding block and the support plate.

[0009] Among them, the shock-absorbing plate includes a base plate, a partition, a buffer block and a buffer spring. The partition is fixedly connected to the support plate and is located on the top of the support plate. The buffer block is fixedly connected to the partition and is located on the side of the partition away from the support plate. The base plate is fixedly connected to the buffer block and is located on the side of the buffer block away from the partition. The buffer spring is fixedly connected to the partition, isolated from the base plate, and is located between the base plate and the partition.

[0010] The protective frame further comprises a spring clip and a drying box, wherein the spring clip is assembled on one side of the base plate, and the drying box is arranged on one side of the spring frame.

[0011] The flaw detection equipment includes a magnetizing power supply and a detection head. The magnetizing power supply is assembled on the top of the substrate, and the detection head is arranged on one side of the magnetizing power supply.

[0012] In a second aspect, the present invention further provides a magnetic particle inspection method, which is applied to the mobile magnetic particle inspection device as described in the first aspect, comprising the following steps:

[0013] Move the protective box to the inspection workpiece position via the universal wheels, open the sliding door, and control the lifting platform through the controller to lift the magnetizing power supply and detection head;

[0014] Clean the surface of the workpiece, connect the probe to the magnetizing power supply via a cable, and then place the probe on the workpiece for flaw detection, maintaining contact;

[0015] The detection head is slowly moved to detect the workpiece, and then the workpiece is demagnetized to complete the flaw detection operation of the workpiece.

[0016] The mobile magnetic particle flaw detection device of the present invention is used for magnetic particle flaw detection of mechanical workpieces, and the protective frame is used to move and transport the flaw detection equipment to the position where the workpiece needs to be inspected, and to protect the flaw detection equipment to prevent the flaw detection equipment from being damaged by impact from foreign objects. Specifically, when inspecting the workpiece, the worker pushes the protective box with his hands, and the universal wheel slides on the ground under the force of the protective box, thereby moving the protective box to the position where the workpiece needs to be inspected. The worker then pulls the sliding door with his hands to open the protective box, and controls the lifting platform to operate through the controller to lift the flaw detection equipment until the flaw detection equipment is pushed out of the protective box. At this time, the worker cleans the surface of the workpiece, then places the flaw detection equipment on the workpiece for flaw detection, maintains contact, moves slowly, completes the workpiece inspection, and then demagnetizes the workpiece to complete the flaw detection operation of the workpiece. After the flaw detection is completed, the lifting platform is controlled again to move the lifting platform down to store the flaw detection equipment in the protective box, and finally the sliding door is closed to store the flaw detection equipment. The flaw detection device can be directly moved to the location of the workpiece to perform on-site inspection of the workpiece, eliminating the time of moving the workpiece back and forth multiple times, improving the efficiency of flaw detection, and can store and protect the flaw detection equipment, solving the problem of low efficiency of existing fixed magnetic particle flaw detection equipment that requires moving workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the mobile magnetic particle flaw detection device provided by the present invention.

[0019] Figure 2 It is a top view of the mobile magnetic particle flaw detection device provided by the present invention.

[0020] Figure 3 yes Figure 2 Section view along plane AA.

[0021] Figure 4 The present invention provides a flow chart of the magnetic particle flaw detection method.

[0022] In the figure: 1-NDT equipment, 2-protective frame, 3-universal wheel, 4-protective box, 5-sliding door, 6-lifting platform, 7-shock-absorbing plate, 8-support plate, 9-lifting frame, 10-guide rod, 11-dual-axis motor, 12-screw, 13-sliding block, 14-rotating rod, 15-base plate, 16-partition, 17-buffer block, 18-buffer spring, 19-spring clamp, 20-drying box, 21-magnetizing power supply, 22-detection head. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0024] See also Figures 1 to 3 In the first aspect, the present invention provides a mobile magnetic particle flaw detection device, including a flaw detection device 1 and a protective frame 2, wherein the protective frame 2 includes a universal wheel 3, a protective box 4, a sliding door 5, a lifting platform 6 and a shock-absorbing plate 7; the protective box 4 is fixedly connected to the universal wheel 3 and is located at the top of the universal wheel 3, the sliding door 5 is slidably connected to the protective box 4 and is located at the top of the protective box 4, the lifting platform 6 is assembled in the protective box 4, the shock-absorbing plate 7 is assembled on one side of the lifting platform 6, and the flaw detection device 1 is assembled on the top of the shock-absorbing plate 7.

[0025] In an embodiment of the present invention, the flaw detection equipment 1 is used for magnetic particle flaw detection of mechanical workpieces, and the protective frame 2 is used to move and transport the flaw detection equipment 1 to the position where the workpiece needs to be inspected, and to protect the flaw detection equipment 1 to prevent the flaw detection equipment 1 from being damaged by impact from foreign objects. Specifically, when inspecting the workpiece, the worker pushes the protective box 4 with his hands, and the universal wheel 3 slides on the ground under the force of the protective box 4, thereby moving the protective box 4 to the position where the workpiece needs to be inspected. The worker then pulls the sliding door 5 with his hands to open the protective box 4, and controls the lifting platform 6 to operate and lift the flaw detection equipment 1 through the controller until the flaw detection equipment 1 is pushed out of the protective box. 4. At this time, the worker cleans the surface of the workpiece, then places the flaw detection device 1 on the workpiece for flaw detection, maintains contact, moves slowly, completes the workpiece inspection, and then demagnetizes the workpiece to complete the flaw detection operation of the workpiece. After the flaw detection is completed, the lifting platform 6 is controlled again to move, so that the lifting platform 6 descends and stores the flaw detection device 1 into the protective box 4. Finally, the sliding door 5 is closed to store the flaw detection device 1. The flaw detection device can be directly moved to the location of the workpiece to perform on-site inspection of the workpiece, eliminating the time of moving the workpiece back and forth multiple times, improving the efficiency of flaw detection, and can store and protect the flaw detection device 1, solving the problem of low efficiency of existing fixed magnetic particle flaw detection equipment that requires moving the workpiece.

[0026] Furthermore, the lifting platform 6 includes a support plate 8, a lifting frame 9 and a guide rod 10. The lifting frame 9 is assembled in the protective box 4, the support plate 8 is assembled on the top of the lifting frame 9, and the guide rod 10 is fixedly connected to the protective box 4 and passes through the support plate 8 and the shock-absorbing plate 7; the lifting frame 9 includes a dual-axis motor 11, a screw 12, a sliding block 13 and a rotating rod 14. The dual-axis motor 11 is fixedly connected to the protective box 4 and is located in the protective box 4. The screw 12 is fixedly connected to the output end of the dual-axis motor 11 and is located on both sides of the dual-axis motor 11. The sliding block 13 is threadedly connected to the screw 12 and is slidably connected to the protective box 4 and is located on one side of the screw 12. The rotating rod 14 is assembled between the sliding block 13 and the support plate 8.

[0027] In an embodiment of the present invention, a worker starts the dual-axis motor 11 through a controller, and the output end of the dual-axis motor 11 drives the screws 12 on both sides to rotate, thereby driving the two sliding blocks 13 to slide against each other in the protective box 4, and then drives the rotating rod 14 to rotate to lift or lower the support plate 8 (the dual-axis motor 11 drives the screw 12 to rotate forward, driving the two sliding blocks 13 away from each other. At this time, the rotating rod 14 rotates to lift the support plate 8, and the dual-axis motor 11 drives the screw 12 to reverse, driving the two sliding blocks 13 close to each other. At this time, the rotating rod 14 rotates to lower the support plate 8). The setting of the guide rod 10 is used to guide the support plate 8 when it is raised and lowered, and at the same time, it also makes the lifting of the support plate 8 more stable.

[0028] Furthermore, the shock-absorbing plate 7 includes a base plate 15, a partition 16, a buffer block 17 and a buffer spring 18. The partition 16 is fixedly connected to the support plate 8 and is located on the top of the support plate 8. The buffer block 17 is fixedly connected to the partition 16 and is located on the side of the partition 16 away from the support plate 8. The base plate 15 is fixedly connected to the buffer block 17 and is located on the side of the buffer block 17 away from the partition 16. The buffer spring 18 is fixedly connected to the partition 16, isolated from the base plate 15, and is located between the base plate 15 and the partition 16.

[0029] In an embodiment of the present invention, the partition 16 provides installation conditions for the buffer block 17 and the buffer spring 18, and the base plate 15 provides an installation place for the flaw detection equipment 1. The buffer block 17 is composed of a rubber block or a damping block, and cooperates with the buffer spring 18 to provide double shock-absorbing protection for the flaw detection equipment 1 to prevent the vibration generated when the universal wheel 3 moves the protective box 4 and affects the flaw detection equipment 1.

[0030] Furthermore, the protective frame 2 further includes a spring clip 19 and a drying box 20 . The spring clip 19 is assembled on one side of the base plate 15 , and the drying box 20 is disposed on one side of the spring clip 19 .

[0031] In an embodiment of the present invention, the spring clip 19 is provided to clamp the drying box 20 on the substrate 15. A desiccant is placed in the drying box 20 to absorb moisture in the air inside the protective box 4 to prevent the flaw detection equipment 1 from being damaged by moisture.

[0032] Furthermore, the flaw detection device 1 includes a magnetizing power supply 21 and a detection head 22 . The magnetizing power supply 21 is assembled on the top of the substrate 15 , and the detection head 22 is arranged on one side of the magnetizing power supply 21 .

[0033] In this embodiment of the present invention, the plug of the probe head 22 is connected to the magnetizing power supply 21. The red light on the plug of the probe head 22 illuminates, and the magnetizing power supply 21 supplies power to the probe. During flaw detection, the probe head 22 is placed on the workpiece to be tested, maintaining good contact. Press the switch and simultaneously spray magnetic powder or magnetic suspension onto the inspected area for 2-3 seconds. Slowly move the probe and observe the workpiece.

[0034] See also Figure 4 In a second aspect, the present invention further provides a magnetic particle inspection method, which is applied to the mobile magnetic particle inspection device as described in the first aspect, comprising the following steps:

[0035] S1 moves the protective box 4 to the inspection workpiece position through the universal wheel 3, opens the sliding door 5, and controls the lifting platform 6 through the controller to lift the magnetizing power supply 21 and the detection head 22;

[0036] In an embodiment of the present invention, a worker pushes the protective box 4 with his hands, and the universal wheel 3 slides on the ground under the force of the protective box 4, thereby moving the protective box 4 to the position of the workpiece that needs to be inspected. The worker then pulls the sliding door 5 with his hands to open the protective box 4. The worker starts the dual-axis motor 11 through the controller, and the dual-axis motor 11 drives the screw 12 to rotate forward, driving the two sliding blocks 13 away from each other. At this time, the rotating rod 14 rotates to lift the support plate 8. The guide rod 10 is set to guide the support plate 8 when it is raised and lowered. At the same time, it also makes the lifting of the support plate 8 more stable until the flaw detection equipment 1 is pushed out of the protective box 4.

[0037] S2 cleans the workpiece surface, connects the probe 22 to the magnetizing power supply 21 via a cable, and then places the probe 22 on the workpiece for flaw detection, maintaining contact;

[0038] In this embodiment of the present invention, the plug of the probe 22 is connected to the magnetizing power supply 21. The red light on the plug of the probe 22 is on, and the magnetizing power supply 21 supplies power to the probe. During flaw detection, the probe 22 is placed on the workpiece to maintain good contact.

[0039] S3 slowly moves the detection head 22 to inspect the workpiece, and then demagnetizes the workpiece to complete the flaw detection operation of the workpiece.

[0040] In an embodiment of the present invention, the switch is pressed, and magnetic powder or magnetic suspension is sprayed onto the inspected area simultaneously, and the spraying is maintained for 2-3 seconds. The probe is slowly moved to observe the distribution of magnetic powder on the surface of the workpiece. If there is a defect, the defect will attract magnetic powder due to the leakage magnetic field to form a magnetic trace. Based on the shape, size, position and other characteristics of the magnetic trace, the presence of a defect, the nature of the defect, and the severity of the defect are analyzed and judged. For fluorescent magnetic powder, it is necessary to observe under an ultraviolet lamp. The fluorescent magnetic trace will emit bright fluorescence, making it easier to find small defects. The workpiece is demagnetized by using AC attenuation method, DC commutation attenuation method, etc. to complete the flaw detection operation of the workpiece.

[0041] The above disclosure is merely a preferred embodiment of the mobile magnetic particle inspection device and magnetic particle inspection method of the present invention. It is of course not intended to limit the scope of the present invention. A person skilled in the art will understand that implementing all or part of the processes of the above embodiment and making equivalent changes in accordance with the claims of the present invention still fall within the scope of the invention.

Claims

1. Mobile magnetic particle inspection device, It is characterized by: It includes flaw detection equipment and a protective frame, wherein the protective frame includes universal wheels, a protective box, a sliding door, a lifting platform and a shock-absorbing plate; The protective box is fixedly connected to the universal wheel and is located on the top of the universal wheel. The sliding door is slidably connected to the protective box and is located on the top of the protective box. The lifting platform is assembled in the protective box. The shock-absorbing plate is assembled on one side of the lifting platform. The flaw detection equipment is assembled on the top of the shock-absorbing plate.

2. The mobile magnetic particle inspection device according to claim 1, characterized in that ； The lifting platform includes a support plate, a lifting frame and a guide rod. The lifting frame is assembled in the protection box, the support plate is assembled on the top of the lifting frame, and the guide rod is fixedly connected to the protection box and passes through the support plate and the shock-absorbing plate.

3. The mobile magnetic particle inspection device according to claim 2, characterized in that ； The lifting frame includes a dual-axis motor, a screw, a sliding block and a rotating rod. The dual-axis motor is fixedly connected to the protective box and is located inside the protective box. The screw is fixedly connected to the output end of the dual-axis motor and is located on both sides of the dual-axis motor. The sliding block is threadedly connected to the screw and is slidably connected to the protective box and is located on one side of the screw. The rotating rod is assembled between the sliding block and the support plate.

4. The mobile magnetic particle inspection device according to claim 2, characterized in that ； The shock-absorbing plate includes a base plate, a partition, a buffer block and a buffer spring. The partition is fixedly connected to the support plate and is located on the top of the support plate. The buffer block is fixedly connected to the partition and is located on the side of the partition away from the support plate. The base plate is fixedly connected to the buffer block and is located on the side of the buffer block away from the partition. The buffer spring is fixedly connected to the partition, isolated from the base plate, and is located between the base plate and the partition.

5. The mobile magnetic particle inspection device according to claim 4, characterized in that ； The protective frame further comprises a spring clip and a drying box, wherein the spring clip is assembled on one side of the base plate, and the drying box is arranged on one side of the spring frame.

6. The mobile magnetic particle inspection device according to claim 4, characterized in that; The flaw detection equipment includes a magnetizing power supply and a detection head. The magnetizing power supply is assembled on the top of the substrate, and the detection head is arranged on one side of the magnetizing power supply.

7. A magnetic particle inspection method, applied to the mobile magnetic particle inspection device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Move the protective box to the inspection workpiece position via the universal wheels, open the sliding door, and control the lifting platform through the controller to lift the magnetizing power supply and detection head; Clean the surface of the workpiece, connect the probe to the magnetizing power supply via a cable, and then place the probe on the workpiece for flaw detection, maintaining contact; The detection head is slowly moved to detect the workpiece, and then the workpiece is demagnetized to complete the flaw detection operation of the workpiece.

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