Multipurpose magnetic particle flaw detector

Abstract

The utility model discloses a multipurpose magnetic particle flaw detector which comprises a rack, a rotary positioning mechanism, magnetizing coils, a magnet yoke, a powder spraying mechanism and a lighting lamp, the rotary positioning mechanism is transversely arranged on the rack, and the magnetizing coils are transversely and symmetrically arranged on the two sides of the rotary positioning mechanism; the magnet yokes are arranged on the two sides of the rack through the driving units and located above the rotary positioning mechanism, the powder spraying mechanism is arranged on the rack and located above the magnet yokes, and the lighting lamp is arranged on the top of the rack. The magnetic powder flaw detection device can adapt to magnetic powder flaw detection of various shaft workpieces, rod workpieces, pipe workpieces and other rotating workpieces, can realize the functions of circumferential magnetization, longitudinal magnetization, composite magnetization, demagnetization and the like, and improves the functionality and universality of equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic particle flaw detection, particularly to a multipurpose magnetic particle flaw detector. BACKGROUND

[0002] Magnetic particle flaw detection is to use the difference between the magnetic permeability of the leakage magnetic field of the workpiece defect (such as crack, slag inclusion, and grain) and the magnetic powder, and the magnetic field of the discontinuous part of the magnetized material will be distorted, forming partial magnetic flux leakage, so that the workpiece surface produces a leakage magnetic field, thereby attracting the magnetic powder to form a magnetic powder accumulation - magnetic mark at the defect, under appropriate lighting conditions, the defect position and shape are shown, and the accumulation of these magnetic powders is observed and interpreted, thus realizing magnetic particle flaw detection.

[0003] At present, there are many types of magnetic particle flaw detection equipment for shafts, rods, tubes and other rotating workpieces, but they are relatively specific, and a certain type of equipment can only be used for flaw detection of specific types of products, and some equipment can only be used for circumferential magnetization, while some equipment can only be used for longitudinal magnetization, and the functionality is relatively single, so it needs to be improved. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model discloses a multipurpose magnetic particle flaw detector, which comprises a rack, a rotating positioning mechanism, a magnetizing coil, a magnetic yoke, a powder spraying mechanism and an illuminating lamp, the rotating positioning mechanism is arranged on the rack in the transverse direction, the magnetizing coil is symmetrically arranged on the two sides of the rotating positioning mechanism in the transverse direction, the magnetic yoke is arranged on the two sides of the rack and above the rotating positioning mechanism through a driving unit, the powder spraying mechanism is arranged on the rack and above the magnetic yoke, and the illuminating lamp is arranged on the top of the rack.

[0005] Further, the rotating positioning mechanism comprises a positioning frame, a motor, a gear set and a roller set, the motor is arranged outside the positioning frame and is drivingly connected to the roller set arranged inside the positioning frame through the gear set, the gear set comprises two meshing gears, the motor is drivingly connected to one of the gears, the roller set comprises two symmetrically and spaced apart rollers, one roller set is arranged at each end of the inside of the positioning frame, and the two rollers at the two ends are connected through a transmission shaft.

[0006] Further, the rotating positioning mechanism further comprises a cylinder and a swing arm, two cylinders are symmetrically arranged at each end of the positioning frame, the cylinder body of each cylinder is rotatably connected to the positioning frame, and one swing arm is arranged at the end of the piston rod of each cylinder, one end of the swing arm is rotatably connected to the positioning frame, the other end is rotatably connected to the end of the piston rod, and the magnetizing coil is symmetrically arranged on the two swing arms through a connecting frame and close to the end of the piston rod.

[0007] Further, the powder spraying mechanism comprises a material box, a pump body, a hose and a spraying head, the material box is arranged on one side above the rack, the pump body is arranged at a discharge port of the bottom of the material box, the spraying head is arranged above the rotary positioning mechanism on the rack, and the pump body is connected with the spraying head through the hose.

[0008] Further, a linear module is arranged above the rotary positioning mechanism on the rack, and the spraying head is drivingly connected with the linear module through a sliding block, and the spraying head can be driven to move reciprocatingly along the transverse direction through the linear module.

[0009] Compared with the prior art, the powder spraying mechanism has the advantages that:

[0010] Firstly, the workpiece to be detected is rotated by the rotary positioning mechanism, the workpiece is circumferentially magnetized by energizing the two ends of the workpiece through the magnetic yokes at the two ends, and the workpiece is longitudinally magnetized through the magnetizing coils at the two sides, then the magnetic suspension liquid is uniformly sprayed on the surface of the workpiece through the powder spraying mechanism after the workpiece is magnetized, and then the workpiece is observed under the light of the lighting lamp to determine whether the workpiece has surface defects.

[0011] Secondly, the powder spraying mechanism can be used for magnetic particle inspection of various shafts, rods, pipes and other rotating workpieces, and can realize circumferential magnetization, longitudinal magnetization, composite magnetization and demagnetization, thereby improving the functionality and universality of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0013] Figure 1 is a side view of the overall structure of the present application;

[0014] Figure 2 is a top view of the structure of the rotary positioning mechanism in the present application;

[0015] Figure 3 is a side view of the structure of the rotary positioning mechanism in the present application;

[0016] Figure 4 is a side view of the structure of the magnetizing coil after being folded in the present application.

[0017] Reference signs:

[0018] 1-Frame, 2-Rotary positioning mechanism, 21-Positioning frame, 22-Motor, 23-Gear set, 24-Roller set, 25-Drive shaft, 26-Cylinder, 27-Swing arm, 28-Connecting frame, 3-Magnetic coil, 4-Magnetic yoke, 5-Powder spraying mechanism, 51-Material box, 52-Pump body, 53-Hose, 54-Spray head, 55-Linear module, 56-Slider, 6-Lighting fixture, 7-Drive unit. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the multi-purpose magnetic particle flaw detector in this embodiment includes a frame 1, a rotary positioning mechanism 2, a magnetizing coil 3, a magnetic yoke 4, a powder spraying mechanism 5, and a lighting fixture 6. The rotary positioning mechanism 2 is arranged laterally on the frame 1, the magnetizing coil 3 is symmetrically arranged laterally on both sides of the rotary positioning mechanism 2, the magnetic yoke 4 is arranged on both sides of the frame 1 and above the rotary positioning mechanism 2 through a drive unit 7, the powder spraying mechanism 5 is arranged on the frame 1 and above the magnetic yoke 4, and the lighting fixture 6 is arranged on the top of the frame 1.

[0024] The powder spraying mechanism 5 comprises a material box 51, a pump body 52, a hose 53 and a spraying head 54, the material box 51 is arranged on one side above the rack 1, the pump body 52 is arranged at the discharge port of the bottom of the material box 51, the spraying head 54 is arranged above the rotary positioning mechanism 2 on the rack 1, and the pump body 52 is connected with the spraying head 54 through the hose 53.

[0025] A linear module 55 is further arranged above the rotary positioning mechanism 2 on the rack 1, the spraying head 54 is drivingly connected with the linear module 55 through a sliding block 56, and the spraying head 54 can be driven to move reciprocatingly along the transverse direction through the linear module 55.

[0026] The material box 51 is used for containing the prepared magnetic suspension, the pump body 52 delivers the magnetic suspension to the spraying head 54, and the magnetic suspension is uniformly sprayed on the surface of the magnetized workpiece through the spraying head 54.

[0027] The driving unit 7 can select a driving mode such as a pneumatic cylinder, an oil cylinder and a linear module to drive the magnetic yoke 4 to be butted against the two ends of the workpiece, so that the workpiece is magnetized by energization or demagnetized by inputting three-phase full-wave rectified electricity.

[0028] As shown in Figures 2-3 The rotary positioning mechanism 2 comprises a positioning frame 21, a motor 22, a gear set 23 and a roller set 24, the motor 22 is arranged outside the positioning frame 21 and drivingly connected with the roller set 24 arranged inside the positioning frame 21 through the gear set 23, the gear set 23 comprises two meshing gears, the motor 22 is drivingly connected with one of the gears, the roller set 24 comprises two symmetrical and spaced rollers, one roller set is arranged at each end inside the positioning frame 21, and the two rollers at the two ends are synchronously drivingly connected through a transmission shaft 25.

[0029] The rotary positioning mechanism 2 further comprises pneumatic cylinders 26 and swing arms 27, two pneumatic cylinders 26 are symmetrically arranged at each end of the positioning frame 21, the cylinder bodies of the pneumatic cylinders 26 are rotatably connected with the positioning frame 21, one swing arm 27 is arranged at the end of the piston rod of each pneumatic cylinder 26, one end of the swing arm 27 is rotatably connected with the positioning frame 21, and the other end is rotatably connected with the end of the piston rod, and the magnetizing coil 3 is symmetrically arranged on the two swing arms 27 through a connecting frame 28 and close to the end of the piston rod.

[0030] When detecting, the shaft, the rod, the pipe and other rotating workpieces are placed on the roller set 24, when the circumferential magnetization is needed, the driving unit 7 drives the two magnetic yokes 4 to abut against the two ends of the workpiece, and the magnetic yoke 4 magnetizes the workpiece in the circumferential direction after being electrified. When the longitudinal magnetization of the workpiece is needed, the air cylinder 26 drives the two swing arms 27 to move towards the middle, forming the state shown in Figure 4 The magnetizing coil 3 wraps the workpiece inside, and then the magnetizing coil 3 is electrified to magnetize the workpiece in the longitudinal direction.

[0031] After magnetization, the motor 22 drives the roller set 24 to rotate, and then drives the workpiece to rotate, the linear module 55 drives the spray head 54 to move, and the magnetic suspension liquid is uniformly sprayed on the surface of the workpiece, and then the surface of the workpiece is observed under the appropriate light of the lighting lamp 6, so as to judge whether the workpiece has surface defects such as cracks, slag inclusion and lines.

[0032] The utility model discloses can adapt to various shafts, rods, pipes and other rotating workpieces of magnetic particle inspection, and can realize circumferential magnetization, longitudinal magnetization, composite magnetization and demagnetization functions, improve the functionality and versatility of the equipment.

[0033] The above only for the preferred embodiment of the utility model has been described, and does not limit the utility model, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that ordinary skilled in the art can realize;When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not in the protection scope required by the utility model.

Claims

1. A multi-purpose magnetic particle flaw detector, characterized in that: The device includes a frame, a rotary positioning mechanism, a magnetizing coil, a magnetic yoke, a powder spraying mechanism, and a lighting fixture. The rotary positioning mechanism is arranged laterally on the frame, the magnetizing coil is symmetrically arranged laterally on both sides of the rotary positioning mechanism, the magnetic yoke is arranged on both sides of the frame and above the rotary positioning mechanism via a drive unit, the powder spraying mechanism is arranged on the frame and above the magnetic yoke, and the lighting fixture is arranged on the top of the frame.

2. The multi-purpose magnetic particle flaw detector according to claim 1, characterized in that: The rotary positioning mechanism includes a positioning frame, a motor, a gear set, and a roller set. The motor is located on the outside of the positioning frame and is connected to the roller set located on the inside of the positioning frame via the gear set. The gear set includes two meshing gears, and the motor is connected to one of the gears. The roller set includes two symmetrically spaced rollers. A roller set is provided at each end of the inner side of the positioning frame, and two of the rollers at each end are connected by a drive shaft.

3. The multi-purpose magnetic particle flaw detector according to claim 2, characterized in that: The rotary positioning mechanism also includes cylinders and swing arms. Two cylinders are symmetrically arranged at each end of the positioning frame. The cylinder body end is rotatably connected to the positioning frame. Each cylinder piston rod end is provided with a swing arm. One end of the swing arm is rotatably connected to the positioning frame, and the other end is rotatably connected to the piston rod end. The magnetizing coil is symmetrically arranged on the swing arms on both sides and close to the piston rod end through the connecting frame.

4. The multi-purpose magnetic particle flaw detector according to claim 1, characterized in that: The powder spraying mechanism includes a material box, a pump body, a hose, and a spray head. The material box is located on one side above the frame, the pump body is located at the discharge port at the bottom of the material box, and the spray head is located on the frame above the rotary positioning mechanism. The pump body is connected to the spray head via a hose.

5. The multi-purpose magnetic particle flaw detector according to claim 4, characterized in that: A linear module is also provided on the frame above the rotary positioning mechanism. The spray head is connected to the linear module via a slider, and the linear module can drive the spray head to move back and forth laterally.

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