Magnetic powder detection device of hydroelectric equipment

Abstract

The utility model belongs to the technical field of nondestructive testing, and relates to a magnetic powder detection device of hydroelectric equipment, which comprises a moving structure, a battery for supplying power is arranged on the moving structure, an automatic magnetizing structure is arranged below the moving structure, and the automatic magnetizing structure is electrically connected with the battery; a magnetic suspension spraying structure is arranged at the top of the moving structure, the lower end of the magnetic suspension spraying structure sequentially penetrates through the moving structure and the automatic magnetizing structure to be used for spraying magnetic suspension, an optical shooting structure is further arranged on the moving structure to be used for shooting detection results, and the moving structure comprises a permanent magnet wheel located at the bottom of the moving structure. The magnetic attraction device is used for driving the device to perform magnetic attraction movement on hydroelectric equipment. The movement structure capable of automatically tracking the weld joint can ensure that the movement speed meets the standard requirement, ensure the magnetization time and reduce leak detection; and the automatic magnetizing structure can move under the traction of the moving structure, so that the labor intensity is reduced, and the detection quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of non-destructive testing technology and relates to a magnetic particle testing device for hydroelectric equipment. Background Technology

[0002] Hydropower equipment needs to undergo magnetic particle testing regularly during initial installation and throughout its lifespan to check for surface or near-surface defects near the welds, the main manifestation of which is cracks.

[0003] Magnetic particle testing involves applying an external magnetic field to the ferromagnetic material being tested, causing it to become magnetic, and then applying magnetic powder or a magnetic suspension. The distribution of magnetic traces on the surface is then observed to determine the presence of defects. If defects such as cracks or pores exist on or near the material's surface, these defects will disrupt the internal magnetic field lines, creating magnetic leakage. Magnetic powder, influenced by this leakage magnetic field, will accumulate at the crack or defect locations, forming obvious magnetic powder accumulation traces that are easy to observe and analyze.

[0004] Traditional magnetic particle testing technology relies entirely on manual operation and visual judgment, which is time-consuming, labor-intensive, and has many limitations. Erecting scaffolding inside the equipment is very difficult, and testing personnel are prone to serious safety accidents such as falls from heights; the equipment has poor ventilation, and the toxic and harmful gases it contains can cause injury or even death to personnel; the working environment is harsh, and manual testing is prone to human error and missed detections.

[0005] Furthermore, when conducting magnetic particle testing manually, one hand typically sprays the magnetic suspension while the other holds the magnetic detector to apply magnetization, and the magnetic traces are observed visually to determine the presence of defects. This process involves numerous variables, such as the flow rate, velocity, spray angle, magnetization time, and fluidity of the magnetic suspension, all of which affect the final test results. Moreover, these variables are difficult to standardize and control, relying solely on the experience and skills of the on-site personnel, making it difficult to guarantee quality. Utility Model Content

[0006] The purpose of this invention is to provide a magnetic particle testing device for hydropower equipment, so as to solve the technical problems of existing magnetic particle testing technology for hydropower equipment, which relies entirely on manual operation, has a harsh working environment, high labor intensity, and unstable testing quality.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application discloses a magnetic particle testing device for hydroelectric equipment, comprising: a moving structure, a battery for power supply mounted on the moving structure, an automatic magnetizing structure mounted below the moving structure and electrically connected to the battery; a magnetic suspension spraying structure mounted on the top of the moving structure, the lower end of the magnetic suspension spraying structure passing through the moving structure and the automatic magnetizing structure in sequence for spraying magnetic suspension; and an optical imaging structure mounted on the moving structure for capturing the detection results. The moving structure includes a permanent magnet wheel located at the bottom of the moving structure for driving the device to perform magnetic attraction movement on the hydroelectric equipment.

[0009] Preferably, the motion structure further includes a frame, with the battery fixed to one side of the frame and an automatic controller on the other side of the frame. The automatic controller is connected to an external terminal to receive instructions from the external terminal. A weld seam tracking device is located at one end of the frame, and an optical imaging structure is located at the other end of the frame. A permanent magnet wheel is located at the bottom outer side of the frame and is connected to a worm gear reducer motor. The worm gear reducer motor is connected to a drive motor, which is electrically connected to the automatic controller. An automatic magnetization structure is located at the bottom inner side of the frame, and a magnetic suspension spraying structure is located on the frame and electrically connected to the automatic controller.

[0010] Preferably, the weld seam tracking device includes a structured light module, a binocular camera, and a data transmission module; the structured light module, binocular camera, and data transmission module are all mounted on the vehicle frame, the binocular camera and the data transmission module are electrically connected, and the data transmission module is connected to an external terminal.

[0011] Preferably, the magnetic suspension spraying structure includes a tank body mounted on a moving structure. A liquid inlet is located at the upper end of the tank body, and a delivery pipe is located at the lower end of the tank body. A nozzle is connected to the lower end of the delivery pipe. An inner liner is located inside the tank body, with the liquid inlet and delivery pipe connected to its upper and lower ends respectively. A stirrer is mounted on the inner liner, and a pressure pump is also installed inside the tank body. The pressure pump and stirrer are electrically connected to the moving structure.

[0012] Preferably, the inner liner is a compressible soft inner liner.

[0013] Preferably, when the magnetic particle detection device is working, the stirrer is in a rotating state to keep the magnetic particles in the magnetic suspension liquid suspended.

[0014] Preferably, the automatic magnetization structure includes an iron core, which is fixed at the bottom of the moving structure, and a coil is wound on the iron core, with the coil electrically connected to the battery.

[0015] Preferably, the bottom end of the iron core is in contact with the object being tested.

[0016] Preferably, the optical imaging structure includes a protective cover, which is fixed to the moving structure. An illumination unit and a camera are disposed inside the protective cover, and the illumination unit and the camera are arranged adjacent to each other.

[0017] Preferably, the lighting unit includes a lighting pan-tilt unit and a lighting device, with the lighting pan-tilt unit fixed to the inner wall of the protective cover and the lighting device fixed to the lighting pan-tilt unit.

[0018] Preferably, the protective cover is an opaque shell with a light-transmitting window at the bottom, which is adapted to the camera.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The automatic tracking structure for weld seam movement ensures that the movement speed meets the standard requirements, ensures the magnetization time, and reduces missed detections;

[0021] 2) The automatic magnetic suspension spraying structure can automatically control the flow rate, velocity and spraying angle by adjusting the pressure and opening and closing of the nozzle, in conjunction with the automatic tracking structure of the weld seam, to ensure that the magnetic suspension is sprayed in place, guarantee the magnetization effect, and thus guarantee the detection effect.

[0022] 3) The automatic magnetization structure can move under the traction of the moving structure, reducing labor intensity and ensuring the quality of testing;

[0023] 4) The optical imaging structure can capture clear images, which is more stable and reliable than observation with the naked eye, and can automatically record data to achieve effective management of detection data. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the motion structure of an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the magnetic suspension spraying structure according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the automatic magnetization structure according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the optical imaging structure of an embodiment of the present invention;

[0030] Figure 6This is a schematic diagram of the weld seam tracking device according to an embodiment of the present invention.

[0031] The components are as follows: 1-Motion structure; 101-Frame; 102-Drive motor; 103-Worm gear reducer motor; 104-Permanent magnet wheel; 105-Weld seam tracking device; 1051-Structured light module; 1052-Binocular camera; 1053-Data transmission module; 106-Battery; 107-Automatic controller; 2-Magnetic suspension spraying structure; 201-Tank; 202-Nozzle; 203-Infusion pipe; 204-Pressure pump; 205-Inner liner; 206-Agitator; 207-Infusion port; 3-Automatic magnetization structure; 201-Coil; 302-Iron core; 4-Optical imaging structure; 401-Camera; 402-Illuminator; 403-Illumination pan-tilt unit; 404-Protective cover; 5-Object being inspected. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings:

[0039] See Figure 1 This application discloses a magnetic particle testing device for hydroelectric equipment, comprising: a moving structure 1, on which a battery 106 for power supply is disposed; an automatic magnetizing structure 3 is disposed below the moving structure 1 and electrically connected to the battery 106; a magnetic suspension spraying structure 2 is disposed at the top of the moving structure 1, the lower end of the magnetic suspension spraying structure 2 passing through the moving structure 1 and the automatic magnetizing structure 3 in sequence to spray magnetic suspension; an optical imaging structure 4 is also disposed on the moving structure 1 for capturing the test results; the moving structure that automatically tracks the weld seam can ensure that the movement speed meets the standard requirements, ensure the magnetization time, and reduce missed detections; the automatic magnetizing structure can move under the traction of the moving structure, reducing labor intensity and ensuring the test quality. The moving structure 1 includes a permanent magnet wheel 104, which is located at the bottom of the moving structure 1 and is used to drive the device to perform magnetic attraction movement on the hydroelectric equipment.

[0040] In some embodiments, the main structure of the motion structure 1 includes a frame 101, a drive motor 102, a worm gear reducer motor 103, a permanent magnet wheel 104, a weld seam tracking device 105, a battery 106, and an automatic controller 107. Each mechanism is mounted on the frame 101. The drive motor 102 drives the worm gear reducer motor 103, which in turn drives the permanent magnet wheel 104 to rotate, enabling the motion structure 1 to magnetically move on the hydroelectric equipment. During movement, the weld seam tracking device 105 captures the weld seam position using its equipped binocular camera 1052 and transmits the captured weld seam position to an external terminal via a data transmission module 1053. The automatic controller 107 is connected to the external terminal and receives instructions from it. The external terminal outputs directional control instructions to the automatic controller 107 based on the weld seam position information. The automatic controller 107 adjusts the movement direction of the device by controlling the drive motor 102, ensuring that the weld seam remains centered on the tracking device 106 throughout the movement. The battery 106 supplies power to the entire device. Figure 2 .

[0041] In some embodiments, see Figure 2 The motion structure 1 also includes a frame 101, a battery 106 fixed to one side of the frame 101, an automatic controller 107 on the other side of the frame 101, the automatic controller 107 being connected to an external terminal for receiving instructions from the external terminal, a weld seam tracking device 105 at one end of the frame 101, an optical imaging structure 4 at the other end of the frame 101, a permanent magnet wheel 104 at the bottom outer side of the frame 101 connected to a worm gear reducer motor 103, the worm gear reducer motor 103 being connected to a drive motor 102, and the drive motor 102 being electrically connected to the automatic controller 107; an automatic magnetizing structure 3 at the bottom inner side of the frame 101, and a magnetic suspension spraying structure 2 on the frame 101 electrically connected to the automatic controller 107.

[0042] See Figure 6 The weld seam tracking device 105 mainly consists of a structure light module 1051, a binocular camera 1052, and a data transmission module 1053. The structure light module 1051 forms a certain angle with the object being measured and is used to emit a set of mesh or parallel line light sources onto the surface of the object being measured 5. Affected by the spatial position and surface shape, the mesh or parallel lines will change shape when projected onto the surface of the object being measured 5. The binocular camera 1052 can collect the structure light information and texture information of the surface of the object being measured 5. The acquired data is transmitted to the data transmission module 1053. The data transmission module 1053 transmits the acquired data information to the peripheral terminal in real time. The peripheral terminal outputs control commands to the automatic controller 107 according to the acquired structure light information and texture information of the workpiece surface. The automatic controller 107 adjusts the overall direction of the device in real time so that the moving structure 1 can keep the weld seam in the center of the optical imaging structure 4 during movement.

[0043] In some embodiments, see Figure 3 The magnetic suspension spraying structure 2 includes a tank 201, which is mounted on the moving structure 1. The upper end of the tank 201 has a liquid inlet 207, and the lower end of the tank 201 has a liquid delivery pipe 203. The lower end of the liquid delivery pipe 203 is connected to a nozzle 202. The tank 201 has an inner liner 205 inside, and the upper and lower ends of the inner liner 205 are respectively connected to the liquid inlet 207 and the liquid delivery pipe 203. The inner liner 205 has a stirrer 206, and the tank 201 also has a pressure pump 204 inside. The pressure pump 204 and the stirrer 206 are electrically connected to the moving structure 1.

[0044] More preferably, the inner liner 205 is a compressible soft inner liner.

[0045] More preferably, when the magnetic powder detection device is working, the stirrer 206 is in a rotating state to keep the magnetic powder in the magnetic suspension liquid always suspended.

[0046] In some embodiments, the main structure of the magnetic suspension spraying structure 2 includes a tank 201, a nozzle 202, a delivery pipe 203, a pressurizing pump 204, an inner tank 205, a stirrer 206, and a filling port 207. All parts are connected together via the tank 201. The nozzle 202 is located on the side of the tank facing the surface to be tested. The delivery pipe 203 connects the nozzle 202 and the inner tank 205. The pressurizing pump 204 can pressurize the space between the tank 201 and the inner tank 205, ensuring the inner tank 205 is always under pressure. When the nozzle 202 is opened, the magnetic suspension stored in the inner tank 205 flows through the delivery pipe 203 to the nozzle 202 and is sprayed out. The stirrer 206 operates continuously, agitating the inner tank 205 to keep the magnetic powder in the magnetic suspension suspended. When the magnetic suspension is insufficient, it is replenished to the inner tank 205 through the filling port 207. Nozzle 202, pressure pump 204, and agitator 206 are all controlled by automatic controller 107. For example... Figure 3 .

[0047] In some embodiments, the automatic magnetization structure 3 includes an iron core 302, which is fixed to the bottom of the motion structure 1. A coil 301 is wound on the iron core 302, and the coil 301 is electrically connected to the battery 106.

[0048] More preferably, the bottom end of the iron core 302 is in contact with the object being tested.

[0049] In some embodiments, the optical imaging structure 4 includes a protective cover 404, which is fixed to the moving structure. An illumination unit and a camera 401 are disposed inside the protective cover 404, and the illumination unit and the camera 401 are arranged adjacent to each other.

[0050] In some embodiments, the lighting unit includes a lighting pan-tilt head 403 and a illuminator 402. The lighting pan-tilt head 403 is fixed to the inner wall of the protective cover 404, and the illuminator 402 is fixed to the lighting pan-tilt head 403.

[0051] In some embodiments, the protective cover 404 is an opaque shell with a light-transmitting window at its bottom, the light-transmitting window being adapted to the camera 401.

[0052]

Example

[0053] This embodiment designs a permanent magnet adsorption motion structure 1 with weld seam tracking function, equipped with a magnetic suspension spraying structure 2 and an automatic magnetization structure 3, as well as an optical imaging structure 4, which can realize the aforementioned functions. Figure 1 .

[0054] The automatic magnetization structure 3 mainly includes a coil 301 and an iron core 302. The coil 301 is controlled by an automatic controller 107 to generate a magnetic field. The iron core 302 comes into contact with the object being detected, guiding the magnetic field to the object and achieving magnetization. Figure 4 .

[0055] The optical imaging structure 4 mainly comprises a camera 401, an illuminator 402, an illumination pan-tilt unit 403, and a protective cover 404. The camera 401 is used to capture the detection results and should have adjustable focal length, aperture, and shutter speed. The illuminator 402 controls color temperature and light intensity and is mounted on the illumination pan-tilt unit 403, which adjusts the direction of illumination. The protective cover 404 has an opaque outer shell and a light-transmitting window, protecting the internal optical components and reducing ambient light interference. Figure 5 .

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic particle testing device for hydroelectric equipment, characterized in that, include: The moving structure (1) is equipped with a battery (106) for power supply. An automatic magnetizing structure (3) is provided below the moving structure (1) and is electrically connected to the battery (106). A magnetic suspension spraying structure (2) is provided at the top of the moving structure (1). The lower end of the magnetic suspension spraying structure (2) passes through the moving structure (1) and the automatic magnetizing structure (3) in sequence to spray the magnetic suspension. An optical imaging structure (4) is also provided on the moving structure (1) for imaging the detection results. The moving structure (1) includes a permanent magnet wheel (104). The permanent magnet wheel (104) is located at the bottom of the moving structure (1) and is used to drive the device to perform magnetic attraction on the water and electricity equipment.

2. The magnetic particle testing device for hydroelectric equipment according to claim 1, characterized in that, The motion structure (1) also includes a frame (101), a battery (106) fixed on one side of the frame (101), an automatic controller (107) on the other side of the frame (101), the automatic controller (107) being connected to an external terminal to receive instructions from the external terminal, a weld seam tracking device (105) on one end of the frame (101) being connected to an external terminal, an optical imaging structure (4) on the other end of the frame (101), a permanent magnet wheel (104) on the bottom outer side of the frame (101) being connected to a worm gear reducer motor (103), the worm gear reducer motor (103) being connected to a drive motor (102), the drive motor (102) being electrically connected to the automatic controller (107); an automatic magnetizing structure (3) on the bottom inner side of the frame (101), and a magnetic suspension spraying structure (2) on the frame (101) being electrically connected to the automatic controller (107).

3. The magnetic particle testing device for hydroelectric equipment according to claim 2, characterized in that, The weld seam tracking device (105) includes a structured light module (1051), a binocular camera (1052), and a data transmission module (1053). The structured light module (1051), the binocular camera (1052), and the data transmission module (1053) are all mounted on the frame (101). The binocular camera (1052) and the data transmission module (1053) are electrically connected, and the data transmission module (1053) is connected to an external terminal.

4. The magnetic particle testing device for hydroelectric equipment according to claim 1, characterized in that, The magnetic suspension spraying structure (2) includes a tank (201), which is mounted on the moving structure (1). The upper end of the tank (201) is provided with a liquid inlet (207), and the lower end of the tank (201) is provided with a liquid delivery pipe (203). The lower end of the liquid delivery pipe (203) is connected to a nozzle (202). The tank (201) is provided with an inner liner (205). The upper and lower ends of the inner liner (205) are respectively connected to the liquid inlet (207) and the liquid delivery pipe (203). The inner liner (205) is provided with a stirrer (206). The tank (201) is also provided with a pressure pump (204). The pressure pump (204) and the stirrer (206) are electrically connected to the moving structure (1).

5. A magnetic particle testing device for hydroelectric equipment according to claim 4, characterized in that, When the magnetic particle detection device is working, the stirrer (206) is in a rotating state to keep the magnetic particles in the magnetic suspension liquid suspended.

6. The magnetic particle testing device for hydroelectric equipment according to claim 1, characterized in that, The automatic magnetization structure (3) includes an iron core (302), which is fixed at the bottom of the moving structure (1). A coil (301) is wound on the iron core (302), and the coil (301) is electrically connected to the battery (106).

7. A magnetic particle testing device for hydroelectric equipment according to claim 6, characterized in that, The bottom end of the iron core (302) is in contact with the object being tested (5).

8. A magnetic particle testing device for hydroelectric equipment according to claim 1, characterized in that, The optical imaging structure (4) includes a protective cover (404), which is fixed on the moving structure. An illumination unit and a camera (401) are provided inside the protective cover (404), and the illumination unit and the camera (401) are arranged adjacent to each other.

9. A magnetic particle testing device for hydroelectric equipment according to claim 8, characterized in that, The lighting unit includes a lighting pan-tilt unit (403) and a illuminator (402). The lighting pan-tilt unit (403) is fixed on the inner wall of the protective cover (404), and the illuminator (402) is fixed on the lighting pan-tilt unit (403).

10. A magnetic particle testing device for hydroelectric equipment according to claim 8, characterized in that, The protective cover (404) is an opaque shell with a light-transmitting window at its bottom, which is adapted to the camera (401).

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