Spherical guide pin for weld seam flaw detection and flaw detection device

Abstract

The utility model relates to a spherical guide pin for weld flaw detection and a flaw detection device, which belong to the technical field of magnetic powder flaw detection and comprise a hemispherical spherical guide pin, any point on the spherical guide pin has magnetic conductivity, a tenon IV and a bolt hole are arranged above the spherical guide pin, and the spherical guide pin can be conveniently connected with a magnet yoke main body. Stainless steel sheets and silicon steel sheets are arranged on two sides of the spherical guide pins to enhance magnetic conductivity. The flaw detection device comprises a magnet yoke body, the magnet yoke body comprises a transverse supporting mechanism, a movable mechanism and a coil, the movable mechanism is connected with the transverse supporting mechanism and a spherical guide foot through a mortise mechanism I and a mortise mechanism II, the transverse supporting mechanism is connected to the upper portion of the movable mechanism, and the spherical guide foot is connected to the lower portion of the movable mechanism and can adapt to different workpieces through movable adjustment. The flaw detection efficiency and accuracy are improved, and the method is suitable for various welding seam flaw detection scenes.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic particle inspection technology, specifically relating to a spherical guide foot and inspection device for weld inspection. Background Technology

[0002] In industry, magnetic particle testing is used for final inspection of finished products or semi-finished products and raw materials to ensure that workpieces do not develop harmful defects on their surfaces after each processing step. Magnetic particle testing is a non-destructive testing method that detects defects on or near the surface of ferromagnetic materials by the accumulation of magnetic powder in a leakage magnetic field near defects. The workpiece is magnetized, and the leakage magnetic field at the defect location attracts the magnetic powder. The distribution of the magnetic powder reveals surface and near-surface defects. Magnetic particle testing is a frequently used non-destructive testing method. In the inspection of pressure pipelines, the commonly used magnetization method is the magnetic yoke method. Magnetic particle testing probes include type A and type D probes. Type A probes are suitable for fillet welds and the internal and external corners of large workpieces, while type D probes are suitable for curved and flat workpieces. Both types of probes have guide feet connected to their ends. These guide feet contact the workpiece to magnetize it; the ends of the guide feet are beveled or curved.

[0003] A magnetic yoke probe for detecting flaws in pipe mitered welds, with publication number CN221745934U, includes a magnetic core. Adjusting arms are rotatably mounted at both ends of the magnetic core, and coils are mounted on both arms. The adjusting arms are detachably connected to guide feet, which include beveled guide feet, flat guide feet, and double-slope guide feet. However, when this magnetic yoke probe detects fillet welds with small included angles and workpieces with small curved surfaces, multiple hinges need to be connected to the magnetic yoke to ensure a tight fit between the guide feet and the workpiece. This method not only reduces detection sensitivity but may even prevent good contact with the detection surface. Utility Model Content

[0004] The technical problem solved by this utility model is to overcome the defects existing in the prior art and provide a spherical guide foot and a flaw detection device for weld flaw detection.

[0005] The technical solution adopted in this utility model is as follows:

[0006] The spherical guide foot for weld flaw detection described in this utility model includes a spherical guide foot, which is hemispherical and has magnetic permeability at any point on the spherical guide foot; a tenon IV is provided above the spherical guide foot, and a bolt hole is provided in the middle of the tenon IV, with a bolt installed in the bolt hole, and the bolt passes through the bolt hole and into the interior of the tenon IV.

[0007] The ball-shaped guide foot has stainless steel plates on both sides, and several overlapping silicon steel plates are placed between the stainless steel plates. The silicon steel plates and stainless steel plates are fixed by rivets, which penetrate through the interior of the silicon steel plates and stainless steel plates.

[0008] The utility model discloses a flaw detection device for weld flaw detection, including the magnetic yoke main part, the lower portion of magnetic yoke main part is connected with the spherical guide foot for weld flaw detection.

[0009] The magnetic yoke main part includes a cross bracing mechanism, the two ends of the cross bracing mechanism are connected with a movable mechanism through a tenon and groove mechanism I, a coil is sleeved on the outer side of the movable mechanism, and the bottom of the movable mechanism is connected with the spherical guide foot through a tenon and groove mechanism II.

[0010] The tenon and groove mechanism I includes a tenon I and a tenon II that are tenon-jointed, the tenon and groove mechanism II includes a tenon III and a tenon IV that are tenon-jointed, the tenon I and the tenon II are provided with a hole corresponding in position in the middle, and the tenon III is provided with a hole corresponding in position with a bolt hole of the tenon IV in the middle.

[0011] The cross bracing mechanism includes a support part, and the tenon I is arranged on the two sides of the support part.

[0012] The tenon II is arranged above the movable mechanism, and the tenon III is arranged below the movable mechanism.

[0013] A coil slot is arranged on the movable mechanism, a square hole is arranged in the middle of the coil, and the coil slot and the square hole are matched to enable the coil to be wound on the outer side of the movable mechanism.

[0014] The cross bracing mechanism and the movable mechanism are both formed by stacking a plurality of silicon steel sheets.

[0015] The utility model has the following beneficial effects:

[0016] 1. The spherical guide foot can effectively contact the welds of workpieces of various angles and shapes, improving the adaptability and flexibility of flaw detection, especially in the flaw detection of small-angle and curved welds, which can better fit the surface of the workpiece and reduce the detection dead angle.

[0017] 2. Any point on the hemispherical spherical guide foot has magnetic conductivity, so that the magnetic lines are more concentrated, improving the sensitivity and accuracy of magnetic powder flaw detection, especially when detecting surface or near-surface defects of the weld, which can more effectively adsorb magnetic powder and clearly display the defects.

[0018] 3. The structure of the silicon steel sheet and the stainless steel sheet improves the magnetic conductivity of the guide foot, enhances the uniformity and strength of the magnetic field, and the rivet fixing structure ensures the durability and reliability of the guide foot.

[0019] 4. The cross bracing mechanism and the movable mechanism provide a flexible adjustment mechanism, so that the flaw detection device can adapt to workpieces of different sizes and shapes, improving the versatility and applicability of the flaw detection device.

[0020] 5. The precise fit of the tongue and groove mechanism ensures that the components of the inspection device are securely connected, while also allowing for quick disassembly and adjustment, improving the ease of maintenance and operation of the inspection device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 schematic view of a spherical foot;

[0022] Figure 2 front view of a spherical foot;

[0023] Figure 3 side view of a spherical foot;

[0024] Figure 4 schematic view of an inspection device;

[0025] Figure 5 front view of an inspection device;

[0026] Figure 6 side view of an inspection device;

[0027] Figure 7 schematic view of a yoke body;

[0028] Figure 8 front view of a yoke body;

[0029] Figure 9 side view of a yoke body;

[0030] Figure 10 schematic view of a cross brace mechanism;

[0031] Figure 11 schematic view of a moving mechanism;

[0032] Figure 12 schematic view of a coil;

[0033] Figure 13 schematic view of a bolt;

[0034] Figure 14 schematic view of an inspection device for fillet weld applications;

[0035] Figure 15 schematic view of an inspection device for vertical weld applications;

[0036] Figure 16 schematic view of an inspection device for pipe weld applications.

[0037] Wherein: 1, spherical guide foot; 2, square hole; 3, tenon IV; 4, bolt hole; 5, bolt; 6, silicon steel sheet; 7, stainless steel sheet; 8, rivet; 9, cross bracing mechanism; 10, movable mechanism; 11, coil; 12, tenon groove mechanism I; 13, tenon groove mechanism II; 14, tenon I; 15, tenon II; 16, tenon III; 17, support part; 18, coil groove. DETAILED DESCRIPTION

[0038] Example 1:

[0039] As Figures 1 to 3 shown, the spherical guide foot for weld flaw detection, including spherical guide foot 1, spherical guide foot 1 is hemispherical, any point on the spherical guide foot 1 has magnetic conductivity; the upper side of the spherical guide foot 1 is provided with tenon IV 3, the middle of the tenon IV 3 is provided with bolt hole 4, the bolt hole 4 is provided with bolt 5, and the bolt 5 penetrates the inside of the tenon IV 3 through the bolt hole 4.

[0040] The two sides of the spherical guide foot 1 are provided with stainless steel sheets 7, and a plurality of superimposed silicon steel sheets 6 are arranged between the stainless steel sheets 7, and the silicon steel sheets 6 and the stainless steel sheets 7 are fixed by rivets 8, and the rivets 8 penetrate the inside of the silicon steel sheets 6 and the stainless steel sheets 7.

[0041] Specifically, the spherical guide foot 1 is formed by superimposing a plurality of silicon steel sheets 6, the two sides of the spherical guide foot 1 are provided with stainless steel sheets 7, the two stainless steel sheets 7 are tightly attached to the two sides of the superimposed silicon steel sheets 6, and the silicon steel sheets 6 and the stainless steel sheets 7 are fixed by rivets 8.

[0042] Specifically, the upper side of the spherical guide foot 1 is tenon IV 3, the middle of the tenon IV 3 is provided with bolt hole 4, the bolt hole 4 is used to install bolt 5 to movably connect the spherical guide foot 1 and the magnetic yoke body, and the spherical guide foot 1 can rotate around the bolt 5.

[0043] Specifically, in order to ensure the detection sensitivity and the detection speed, when the magnetic yoke method is used for detection, the smaller the gap between the magnetic yoke and the detection workpiece is, the better, and the maximum gap of the contact part between the end face of the guide foot of the magnetic yoke and the surface of the workpiece should not exceed 1.5 mm. The contact between the spherical guide foot 1 and the workpiece is a point, and the gap between the end face of the spherical guide foot 1 and the contact part of the surface of the workpiece is 0.5 mm. In fact, in the area where the end face of the spherical guide foot 1 and the surface of the workpiece contact surface ≤0.5 mm, the magnetic force line also passes through, but the magnetic field intensity is weaker than when the gap is zero. Compared with the flat guide foot, because the surface of the workpiece or the guide foot plane is not smooth enough or the joint angle of the magnetic yoke cannot be adjusted to satisfy the good contact between the end face of the guide foot and the surface of the workpiece, the magnetic force line passing amount of the spherical guide foot 1 is larger, and the lifting force is more stable.

[0044] Example 2:

[0045] AsFigures 4 to 16 The utility model discloses a flaw detection device for weld flaw detection, including the magnetic yoke main part, the lower side of magnetic yoke main part is connected with the spherical guide foot for weld flaw detection.

[0046] The magnetic yoke main body includes a cross bracing mechanism 9, both ends of the cross bracing mechanism 9 are connected with a movable mechanism 10 through a tenon and groove mechanism I12, the movable mechanism 10 is sleeved with a coil 11 on the outer side, and the bottom of the movable mechanism 10 is connected with the spherical guide foot 1 through a tenon and groove mechanism II 13.

[0047] The tenon and groove mechanism I12 includes a tenon I14 and a tenon II 15 that are tenon-jointed, the tenon and groove mechanism II 13 includes a tenon III 16 and a tenon IV 3 that are tenon-jointed, and the tenon I14 and the tenon II 15 are provided with openings corresponding in position in the middle, and the tenon III 16 is provided with an opening corresponding in position with a bolt hole 4 of the tenon IV 3 in the middle.

[0048] The cross bracing mechanism 9 includes a support portion 17, and the tenon I14 is arranged on both sides of the support portion 17.

[0049] The tenon II 15 is arranged above the movable mechanism 10, and the tenon III 16 is arranged below the movable mechanism 10.

[0050] The movable mechanism 10 is provided with a coil groove 18, the middle of the coil 11 is provided with a square hole 2, and the coil groove 18 cooperates with the square hole 2 to enable the coil 11 to be wound on the outer side of the movable mechanism 10.

[0051] The cross bracing mechanism 9 and the movable mechanism 10 are both formed by stacking a plurality of silicon steel sheets.

[0052] Specifically, the magnetic yoke body includes a cross bracing mechanism 9 and movable mechanisms 10 connected on both sides of the cross bracing mechanism 9, the movable mechanisms 10 are sleeved with coils 11 on the outer side, and the movable mechanisms 10 are connected with spherical guide feet 1 below.

[0053] Specifically, the cross bracing mechanism is connected with the movable mechanisms 10 on both sides through a tenon and groove mechanism I12, and the movable mechanisms 10 are connected with the spherical guide feet 1 through a tenon and groove mechanism II 13.

[0054] Specifically, the tenon and groove mechanism I12 includes a tenon I14 and a tenon II 15 that are tenon-jointed, the tenon I is arranged on both sides of a support portion 17 of the cross bracing mechanism 9, and the tenon II 15 is arranged above the movable mechanism 10; the tenon and groove mechanism II 13 includes a tenon III 16 and a tenon IV 3 that are tenon-jointed, the tenon III 16 is arranged below the movable mechanism 10, and the tenon IV 3 is arranged above the spherical guide foot 1.

[0055] Specifically, the middle of the tenon I 14 and the tenon II 15 is provided with a position corresponding screw hole, the middle of the tenon III 16 is provided with a hole corresponding to the position of the bolt hole 4, the tenon I 14 and the tenon II 15, the tenon III 16 and the tenon IV 3 are all connected by bolts.

[0056] Specifically, the movable mechanism 10 is provided with a coil groove 18, and the middle of the coil 11 is provided with a square hole 2. The coil groove 18 cooperates with the square hole 2 to make the coil 11 wind outside the movable mechanism 10.

[0057] Specifically, when the corner weld of the workpiece is detected, the spherical guide foot 1 of the detection device abuts on the workpiece on both sides of the corner weld as a support, and the magnetic field action area on the spherical guide foot 1 closely contacts the abutting part of the workpiece, thereby magnetizing the corner weld for detection.

[0058] Specifically, when the pipe weld of the pipe workpiece is detected, the movable mechanism 10 can be adjusted by the mortise mechanism I 12 according to the position of the weld, and the angle of the spherical guide foot 1 can be adjusted by the mortise mechanism II 13, so as to ensure that the position of the movable mechanism 10 is appropriate and the spherical guide foot 1 can closely contact the pipe workpiece, and the spherical guide foot 1 abuts on the pipe workpiece, and then magnetization detection is carried out.

[0059] Specifically, when the weld between two workpieces welded perpendicularly is detected, it is equivalent to the combination of the corner weld and the pipe weld. The weld is between the two workpieces at the corner, and the weld is annular. The detection mode of the corner weld and the pipe weld can be used to flexibly adjust the spherical guide foot 1 and the movable mechanism 10.

Claims

1. A spherical probe for weld inspection, comprising a spherical probe (1), characterized in that, The spherical guide pin (1) is hemispherical, and any point on the spherical guide pin (1) has magnetic conductivity; a tenon IV (3) is arranged above the spherical guide pin (1), a bolt hole (4) is arranged in the middle of the tenon IV (3), a bolt (5) is arranged in the bolt hole (4), and the bolt (5) penetrates the inside of the tenon IV (3) through the bolt hole (4).

2. A ball probe for weld inspection according to claim 1, characterised in that, Stainless steel sheets (7) are arranged on the two sides of the spherical guide pin (1), a plurality of superimposed silicon steel sheets (6) are arranged between the stainless steel sheets (7), and the silicon steel sheets (6) and the stainless steel sheets (7) are fixed by rivets (8) penetrating the inside of the silicon steel sheets (6) and the stainless steel sheets (7).

3. A flaw detection device for weld inspection, comprising a magnetic yoke body, characterized in that, The magnetic yoke body is connected with the spherical guide pin for weld flaw detection according to any one of claims 1-2.

4. The inspection apparatus for inspection of a weld according to claim 3, characterized by, The magnetic yoke body comprises a cross bracing mechanism (9), the two ends of the cross bracing mechanism (9) are connected with a movable mechanism (10) through a mortise and tenon mechanism I (12), the outer side of the movable mechanism (10) is sleeved with a coil (11), and the bottom of the movable mechanism (10) is connected with a spherical guide pin (1) through a mortise and tenon mechanism II (13).

5. The inspection device for inspection of a weld seam according to claim 4, characterized in that The mortise and tenon mechanism I (12) comprises a tenon I (14) and a tenon II (15) in tenon connection, the mortise and tenon mechanism II (13) comprises a tenon III (16) and a tenon IV (3) in tenon connection, the tenon I (14) and the tenon II (15) are provided with corresponding openings in the middle, and the tenon III (16) is provided with an opening corresponding to the bolt hole (4) of the tenon IV (3) in the middle.

6. The inspection device for inspection of a weld seam according to claim 5, characterized in that The cross bracing mechanism (9) comprises a support portion (17), and the tenon I (14) is arranged on the two sides of the support portion (17).

7. The inspection apparatus for inspection of a weld according to claim 5, wherein The tenon II (15) is arranged above the movable mechanism (10), and the tenon III (16) is arranged below the movable mechanism (10).

8. The inspection apparatus for inspection of a weld according to claim 4, characterized by, The movable mechanism (10) is provided with a coil groove (18), the middle of the coil (11) is provided with a square hole (2), and the coil groove (18) cooperates with the square hole (2) to enable the coil (11) to be wound on the outer side of the movable mechanism (10).

9. The inspection apparatus for inspection of a weld according to claim 4, characterized by, The cross bracing mechanism (9) and the movable mechanism (10) are both formed by superimposing a plurality of silicon steel sheets (6).

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