A magnetic particle flaw detection device for special equipment detection

Abstract

The utility model belongs to the field of flaw detection, provide a magnetic particle flaw detection device for special equipment detection, including handheld base, built -in power supply module, two connection column hinged in handheld base both ends, the probe is arc, through the universal assembly and the connection column end connection, the magnetic control spare is located on the handheld base, and is electrically connected with the probe, the utility model discloses through the plane of arc body, the design of inner and outer arc surface, cooperation connection column's ±90 DEG rotation, can simultaneously adapt three detection surfaces of T type joint, need not to change the probe, improve the detection efficiency, meet the demand of special equipment complex structure detection, through the spherical hinge universal adjustment and the elastic compensation of rubber protective sleeve 301, make better protective sleeve to fit work piece, reduce the clearance between probe and work piece, through the magnetic grid enhancement magnetic field uniformity, reduce even eliminate the problem of missing detection caused by air gap.

Description

Technical Field

[0001] This utility model belongs to the field of flaw detection, specifically a magnetic particle flaw detection device for special equipment inspection. Background Technology

[0002] In the inspection of special equipment, magnetic particle testing is an important means of detecting defects in key parts such as T-joints and fillet welds formed by welding boiler pipes to the furnace body. It uses a probe to generate a magnetic field, causing magnetic particles to accumulate at the defect site and form magnetic traces to determine the defect situation.

[0003] However, in existing technologies, C-shaped probes are mostly designed with flat or single-arc poles, making it difficult to simultaneously adapt to different shaped inspection surfaces such as the flat surface of T-joints, the outer arc surface of pipes, and the inner arc surface. This requires frequent probe replacements during inspection, resulting in low efficiency. The fit between the probe and the workpiece relies on manual pressing, which can easily introduce air due to excessive gaps, leading to a sudden increase in magnetic resistance and a decrease in magnetic field strength. This results in poor detection of micro-cracks and a high risk of missed detections. Furthermore, the fixed probe angle cannot be flexibly adjusted to the curvature of the workpiece, requiring constant adjustments to the hand position during operation, increasing labor intensity. In addition, most devices lack integrated lighting, requiring additional light sources, which affects the continuity and accuracy of inspection. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a magnetic particle inspection device for special equipment testing, which solves the problem in the prior art where the fixed structure of the magnetic particle inspection probe leads to poor fit, high risk of missed detection, and affects the quality of testing.

[0005] A magnetic particle inspection device for special equipment includes:

[0006] The handheld base serves as the main grip for operation and has a built-in power supply module.

[0007] Connecting columns, two of which are hinged to both ends of the handheld base, allow for adjustable opening and closing angles;

[0008] The probe, which is arc-shaped, is connected to the end of the connecting post via a universal assembly to generate a magnetizing magnetic field;

[0009] The magnetic flux control unit, located on the handheld base, is electrically connected to the probe and is used to control the on / off state of the magnetic field.

[0010] The lighting components are located inside the two connecting columns and are used for lighting the detection area.

[0011] Preferably, the universal joint is a ball joint assembly, including a ball joint rod and a ball joint seat. The ball joint rod is fixed to the probe, and the ball joint seat is fixed to the end of the connecting column. The ball joint rod can rotate within the ball joint seat.

[0012] Preferably, the probe includes an arc-shaped body and a protective sleeve. The protective sleeve is fitted over the outside of the arc-shaped body, is made of rubber material, and has a magnetic mesh embedded inside.

[0013] Preferably, the protective sleeve is coated with a polytetrafluoroethylene coating, and the arc-shaped body is formed by stacking high-permeability silicon steel sheets.

[0014] Preferably, the side of the arc-shaped body away from the universal assembly is a plane, and the inner and outer arc surfaces are adapted to the outer and inner arc surfaces of the pipe, respectively, and the protective sleeve is formed along with the arc-shaped body.

[0015] Preferably, the handheld base is made of high-strength ABS plastic with anti-slip texture on the surface, and the lighting element is a light lamp that can focus light.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model, through the design of the plane and inner and outer arc surfaces of the arc-shaped body, combined with the ±90° rotation of the connecting column, can simultaneously adapt to the three detection surfaces of the T-type connector without the need to replace the probe, thereby improving detection efficiency and meeting the detection needs of complex structures of special equipment.

[0018] 2. This utility model uses the ball joint universal adjustment and the elastic compensation of the rubber protective sleeve 301 to make the protective sleeve fit the workpiece better, reduce the gap between the probe and the workpiece, and enhance the uniformity of the magnetic field through the magnetic mesh, thereby reducing or even eliminating the problem of missed detection caused by air gap. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present utility model;

[0020] Figure 2 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a second-view three-dimensional structural diagram of the present invention.

[0022] In the picture:

[0023] 1. Handheld base; 2. Connecting post; 3. Probe; 301. Protective cover; 302. Arc-shaped body; 4. Ball joint assembly; 401. Ball head rod; 402. Ball head seat; 5. Lighting lamp; 6. Magnetic button. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] As attached Figure 1 To be continued Figure 3 As shown:

[0026] This utility model provides a magnetic particle flaw detection device for special equipment inspection, including a handheld base 1, which is injection molded from high-strength ABS plastic, 20cm in length, with anti-slip texture on the surface, and has a built-in battery. The two ends of the base are hinged to connecting columns 2 via hinge shafts, allowing adjustment of the opening angle of the probe 3 to accommodate workpieces of different thicknesses.

[0027] As attached Figure 1 To be continued Figure 3 As shown: The end of the connecting column 2 is universally connected to the probe 3 via a ball joint assembly 4. The ball joint assembly 4 includes a ball head seat 402 fixed to the end of the connecting column 2 and a ball head rod 401 fixed to the probe 3. The ball head rod 401 can rotate 360° within the ball head seat 402 with a rotation damping of 5 to 10 N·m, ensuring that the probe 3 can fit against the workpiece surface at any angle.

[0028] As attached Figure 1 To be continued Figure 3 As shown: Probe 3 includes an arc-shaped body 302 and a protective sleeve 301. The arc-shaped body 302 is made of high-permeability silicon steel sheets, with an arc radius of R30-R200mm. The protective sleeve 301 is made of nitrile rubber with a thickness of 3mm. The protective sleeve 301 is fitted onto the outside of the arc-shaped body 302, and has a magnetic mesh made of permalloy wire embedded inside to reduce magnetic field loss. The surface is coated with polytetrafluoroethylene, which enhances wear resistance and prevents scratches on stainless steel workpieces.

[0029] As attached Figure 1 To be continued Figure 3 As shown: the side end face of the arc-shaped body 302 away from the ball joint assembly 4 is flat, which is used to adapt to the plane detection. The inner and outer arc surfaces are adapted to the outer arc surface and inner arc surface of the pipe, respectively. The protective sleeve 301 is formed with the arc-shaped body 302. The rubber elasticity can compensate for the surface unevenness of 0.1-1mm, ensuring that the gap between the workpiece and the workpiece is <0.1mm, which greatly reduces the magnetic resistance.

[0030] As attached Figure 1 To be continued Figure 3 As shown: The handheld base 1 is located inside the two connecting pillars 2, and the lighting lamp 5 is fixed by the bracket. The light can be focused on the detection area to improve the visibility of the magnetic trace. The surface of the base is embedded with a magnetic button 6. When pressed, it supplies power to the arc-shaped body 302 through the wire to control the magnetic field strength.

[0031] Working principle: When inspecting the T-joint between the pipe and the furnace body, rotate the connecting column 2 to an opening angle of 120° according to the pipe diameter. Adjust the inner side of the arc-shaped body 302 of the probe 3 to fit against the outer arc surface of the pipe through the ball joint assembly 4. The rubber elasticity of the protective sleeve 301 ensures no gaps. Press the magnetic button 6 to spray magnetic suspension liquid into the inspection area; move the handheld base 1 along the weld seam, and focus the illumination lamp 5 on the inspection surface. The magnetic field formed by the arc-shaped body 302 causes magnetic powder to be attracted to the defect, forming a magnetic mark. During the movement, the polytetrafluoroethylene coating of the protective sleeve 301 reduces friction, and the ball joint assembly 4 adjusts the angle in real time to ensure stable contact.

[0032] When inspecting a planar fillet weld, the connecting column 2 is rotated to an opening angle of 90°, and the planar side of the probe 3 is made to fit against the workpiece plane through the ball joint assembly 4. The protective sleeve 301 is deformed under pressure to compensate for the small indentation of the planar surface.

[0033] After magnetization, the device moves along the weld seam, and the lighting lamp 5 illuminates the magnetic trace. The magnetic mesh of the arc-shaped body 302 ensures that the magnetic field uniformly covers the weld seam and the heat-affected zone, and can detect microcracks with a depth of 0.1 mm.

[0034] The embodiments of this utility model are given for the purpose of illustration and description. Although the embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Any changes, modifications, substitutions and variations made by those skilled in the art to the above embodiments within the scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic particle inspection device for special equipment, characterized in that, include: The handheld base (1) serves as the main operating grip and has a built-in power supply module; Connecting posts (2), the two connecting posts (2) are hinged to both ends of the handheld base (1) and the opening and closing angle can be adjusted; The probe (3) is arc-shaped and is connected to the end of the connecting post (2) via a universal assembly to form a magnetizing magnetic field; The magnetic control unit (6) is located on the handheld base (1) and is electrically connected to the probe (3) to control the magnetic field on and off. The lighting component (5) is located inside the two connecting columns (2) and is used for lighting the detection area.

2. The magnetic particle inspection device for special equipment as described in claim 1, characterized in that, The universal assembly is a ball joint assembly (4), including a ball head rod (401) and a ball head seat (402). The ball head rod (401) is fixed to the probe (3), and the ball head seat (402) is fixed to the end of the connecting column (2). The ball head rod (401) can rotate within the ball head seat (402).

3. The magnetic particle inspection device for special equipment as described in claim 1, characterized in that, The probe (3) includes an arc-shaped body (302) and a protective sleeve (301). The protective sleeve (301) is fitted on the outside of the arc-shaped body (302), is made of rubber material, and has a magnetic mesh embedded inside.

4. The magnetic particle inspection device for special equipment as described in claim 3, characterized in that, The protective sleeve (301) is coated with polytetrafluoroethylene, and the arc-shaped body (302) is formed by stacking high magnetic permeability silicon steel sheets.

5. A magnetic particle inspection device for special equipment as described in claim 3, characterized in that, The side of the arc-shaped body (302) away from the universal assembly is a plane, and the inner and outer arc surfaces are adapted to the outer arc surface and inner arc surface of the pipe, respectively. The protective sleeve (301) is formed along with the arc-shaped body (302).

6. The magnetic particle inspection device for special equipment as described in claim 1, characterized in that, The handheld base (1) is made of high-strength ABS plastic and has anti-slip texture on the surface. The lighting element (5) is a light lamp that can focus light.

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