O-shaped probe structure for detecting tubular workpiece and flaw detector

Abstract

The utility model relates to an O-shaped probe structure and a flaw detector for detecting tubular workpieces, which belong to the technical field of nondestructive testing and comprise an O-shaped probe structure and a flaw detector main body which are connected with each other, the flaw detector main body comprises a handle and a shell, an E-shaped coil, a C-shaped connecting mechanism and a limiting groove are arranged in the shell, and a U-shaped clamping groove is arranged on the C-shaped connecting mechanism; the O-shaped probe structure comprises an O-shaped probe I and an O-shaped probe II which are hinged to each other, contact points are arranged on the O-shaped probe I and the O-shaped probe II, the O-shaped probe I is connected with a fixing mechanism I, a lock catch is arranged on the fixing mechanism I, the O-shaped probe II is connected with a fixing mechanism II, and the fixing mechanism II is connected with a fixing block; and the fixing mechanism II is clamped in the limiting groove, the fixing block is fixed on the inner wall of the shell through a bolt, and the U-shaped groove is matched with the lock catch, so that magnetic flux conduction between the C-shaped connecting mechanism and the O-shaped probe structure is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of non-destructive testing, and particularly relates to an O-type probe structure and a flaw detector for detecting a tubular workpiece. Background Art

[0002] Magnetic particle inspection (MPI) is a widely used nondestructive testing method in the production and processing of workpieces. It can effectively detect surface defects produced by welding, metal heat treatment, and grinding in finished products. It is also suitable for surface testing of finished products and raw materials, such as bars, billets, forgings, and castings. Furthermore, MPI plays an important role in railway and aviation transportation and is indispensable in the smelting, chemical, power, and machinery industries. In particular, it can promptly detect defects in critical steel components, such as fatigue cracks, during equipment maintenance, thereby preventing safety accidents during operation and production. Magnetic particle inspection detects surface or near-surface defects in ferromagnetic materials by collecting magnetic particles in the leakage magnetic field near the defect. For testing pipes and tubular workpieces, an O-type probe is typically used. However, the commonly used O-type probe is a closed, integrated structure that can only be inserted from one end of the pipe or tubular workpiece and then moved horizontally for testing, limiting its application scenarios.

[0003] In the prior art, a multi-functional magnetic particle flaw detector with an adjustable probe is disclosed with announcement number CN209132212U. The flaw detector comprises a main body and a probe. An adjusting screw is provided on the side of the main body, a probe seat is provided on the adjusting screw, a magnetic yoke is provided inside the probe seat, a magnetic yoke probe is installed at the bottom of the magnetic yoke, and the probe seat is divided into left and right parts. The opposite sides of the left probe seat and the right probe seat are arc surfaces. The left and right probe seats are adjusted to adapt to the workpiece by moving along the adjusting screw. However, the flaw detector adjusts the probe by the screw, which is insufficient in flexibility and the magnetic flux conduction capacity between the probes is insufficient, which affects the detection accuracy. Utility Model Content

[0004] The technical problem solved by the utility model is to overcome the problems existing in the prior art and provide an O-type probe structure and a flaw detector for detecting tubular workpieces.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] The O-type probe structure for detecting tubular workpieces described in the utility model includes an O-type probe I and an O-type probe II. The O-type probe I is provided with a connecting end I and a contact end I, and the O-type probe II is provided with a connecting end II and a contact end II; the connecting end I is hingedly connected to the connecting end II by a hinge; the contact end I is connected to a fixing mechanism I, and the fixing mechanism I is provided with a lock; the contact end II is connected to the fixing mechanism II, and the fixing mechanism II is connected to a fixing block, and the fixing block is provided with a fixing hole.

[0007] A screw hole is provided on the fixing mechanism I, and the lock buckle is installed on the fixing mechanism I through the screw hole, and a spring is provided between the lock buckle and the fixing mechanism I.

[0008] The contact end I and the contact end II cooperate with each other, and both the contact end I and the contact end II have a stepped structure.

[0009] Both contact end I and contact end II are provided with a plurality of contact points fixed by bolts.

[0010] The flaw detector for detecting a tubular workpiece of the utility model comprises a flaw detector body, which is connected to an O-shaped probe structure for detecting the tubular workpiece.

[0011] The main body of the flaw detector includes a handle and a shell connected together. An E-type coil is provided in the shell. A limiting groove is provided at the bottom of the shell. The fixing mechanism II is clamped with the shell through the limiting groove, and the fixing block is fixed to the inner wall of the shell by bolts.

[0012] A C-shaped connecting mechanism is also provided inside the shell, and the C-shaped connecting mechanism is fixed to the inner wall of the shell by bolts.

[0013] The C-shaped connecting mechanism is provided with a U-shaped slot, which cooperates with the lock buckle.

[0014] A button is provided on the outside of the handle, an external power interface is provided at the bottom of the handle, and a protective cover is provided on the outside of the external power interface.

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

[0016] 1. The O-type probe I and O-type probe II are connected by a hinge, which makes the O-type probe structure more flexible, especially for the flaw detection of closed tubular workpieces.

[0017] 2. The fixing block, lock and U-shaped slot realize the connection between the O-type probe structure and the flaw detector body. It is easy to disassemble and install, and can be connected and disconnected quickly and stably, which improves the detection efficiency. It is also convenient to replace the O-type probe structure of the corresponding caliber when inspecting tubular workpieces with different diameters.

[0018] 3. The stepped setting of the contact points and the coordination between the contact points on O-type probe I and O-type probe II ensure the uniform distribution of magnetic flux, reduce the detection blind area caused by poor contact, and improve the coverage and reliability of detection.

[0019] 4. The external power interface increases the flexibility of the flaw detector. The protective cover can play a role in waterproof and dustproof, improving the durability and reliability of the equipment.

[0020] 5. The flaw detector body and the O-type probe mechanism are matched, which has strong adaptability for detecting tubular workpieces, simple operation, accurate detection and durability. It can be effectively used in magnetic particle detection of various tubular workpieces to improve detection efficiency and accuracy of results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the O-type probe;

[0022] Figure 2 It is a plane diagram of the O-type probe;

[0023] Figure 3 It is a three-dimensional schematic diagram of the flaw detector;

[0024] Figure 4 This is a plan view of the flaw detector.

[0025] Among them: 1. O-type probe I; 2. O-type probe II; 3. Hinge; 4. Fixing mechanism I; 5. Lock; 6. Fixing mechanism II; 7. Fixing block; 8. Fixing hole; 9. Spring; 10. Contact point; 11. Handle; 12. Shell; 13. E-type coil; 14. C-type connecting mechanism; 15. U-shaped slot; 16. Button; 17. External power interface; 18. Protective cover. DETAILED DESCRIPTION

[0026] Example 1:

[0027] like Figures 1 to 2 As shown, the O-type probe structure for detecting tubular workpieces described in the present invention includes an O-type probe I1 and an O-type probe II2. The O-type probe I1 is provided with a connecting end I and a contact end I, and the O-type probe II2 is provided with a connecting end II and a contact end II; the connecting end I is hingedly connected to the connecting end II by a hinge 3; the contact end I is connected to a fixing mechanism I4, and the fixing mechanism I4 is provided with a lock 5; the contact end II is connected to a fixing mechanism II6, and the fixing mechanism II6 is connected to a fixing block 7, and the fixing block 7 is provided with a fixing hole 8.

[0028] The fixing mechanism 1 4 is provided with a screw hole, and the lock buckle 5 is installed on the fixing mechanism 1 4 through the screw hole, and a spring 9 is provided between the lock buckle 5 and the fixing mechanism 1 4.

[0029] The contact end I and the contact end II cooperate with each other, and both the contact end I and the contact end II have a stepped structure.

[0030] Both the contact end I and the contact end II are provided with a plurality of contact points 10 fixed by bolts.

[0031] Specifically, the O-type probe structure is open and consists of two parts: O-type probe I1 and O-type probe II2. Both O-type probe I1 and O-type probe II2 are composed of several semicircular components with an insulating layer between the semicircular components. When closed, the O-type probe structure forms several closed magnetic flux loops. O-type probe I1 is divided into a connection end I and a contact end I. Connection end I is a tongue-and-groove structure with a hole in the middle, while contact end I is a stepped structure with several contact points 10. O-type probe II2 is divided into a connection end II and a contact end II. The structure of O-type probe II is similar to that of O-type probe I1, except that the stepped structure of contact end II cooperates with the stepped structure of contact end I in opposite directions. The connection end I and the connection end II are hingedly connected by a hinge. The contact end I is connected to a fixing mechanism I 4, a lock buckle 5 is installed on the fixing mechanism I 4, a spring 9 is provided between the lock buckle 5 and the fixing mechanism I 4, the contact end II is connected to a fixing mechanism II 6, the fixing mechanism II 6 is connected to a fixing block 7, and a fixing hole 8 is provided on the fixing block 7.

[0032] Example 2:

[0033] like Figures 3 and 4 As shown, the flaw detector for detecting tubular workpieces of the present invention comprises a flaw detector body, and the flaw detector body is connected to an O-shaped probe structure for detecting tubular workpieces.

[0034] The main body of the flaw detector includes a handle 11 and a shell 12 connected together. An E-type coil 13 is provided in the shell 12. A limiting groove is provided at the bottom of the shell 12. The fixing mechanism II 6 is clamped with the shell 12 through the limiting groove, and the fixing block 7 is fixed to the inner wall of the shell 12 by bolts.

[0035] A C-shaped connecting mechanism 14 is further provided inside the housing 12 , and the C-shaped connecting mechanism 14 is fixed to the inner wall of the housing 12 by bolts.

[0036] A U-shaped slot 15 is provided on the C-shaped connecting mechanism 14 , and the U-shaped slot 15 cooperates with the lock buckle 5 .

[0037] A button 16 is provided on the outside of the handle 11 , an external power interface 17 is provided at the bottom of the handle 11 , and a protective cover 18 is provided on the outside of the external power interface 17 .

[0038] Specifically, the flaw detector body includes a handle 11 and a housing 12. An E-shaped coil 13 and a C-shaped connecting mechanism 14 are located within the housing 12. The lower right portion of the C-shaped connecting mechanism 14 is connected to the fixing block 7, which is secured to the bottom of the housing 12 via mounting bolts inserted into fixing holes 8. The bottom of the housing 12 also has a retaining groove through which the fixing mechanism 116 engages with the housing 12. A U-shaped slot 15 is located at the upper right portion of the C-shaped connecting mechanism 14, which engages with the lock catch 5.

[0039] Specifically, during the actual inspection process, the lock 5 is first opened, and the O-type probe I1 rotates via the hinge 3. At this point, the O-type probe I1 and O-type probe II2 are opened to a certain angle. After the O-type probe structure is locked onto the tubular workpiece, the O-type probe I1 and O-type probe II2 are closed, and the lock 5 is locked via the U-shaped slot 15, so that the contact point 10 on the contact end I and the contact end II cooperate to form a closed loop structure. The C-type connection mechanism 14 and the E-type coil 13 generate mutual inductance, generating a magnetic field that is transmitted to the O-type probe structure to form a magnetic flux loop. The O-type probe structure magnetizes the tubular workpiece and detects the corresponding defects.

Claims

1. An O-type probe structure for detecting a tubular workpiece, comprising an O-type probe I (1) and an O-type probe II (2), characterized in that: The O-type probe I (1) is provided with a connection end I and a contact end I, and the O-type probe II (2) is provided with a connection end II and a contact end II; the connection end I is hinged to the connection end II via a hinge (3); the contact end I is connected to a fixing mechanism I (4), and the fixing mechanism I (4) is provided with a lock (5); the contact end II is connected to a fixing mechanism II (6), and the fixing mechanism II (6) is connected to a fixing block (7), and the fixing block (7) is provided with a fixing hole (8).

2. The O-type probe structure for detecting tubular workpieces according to claim 1, characterized in that: The fixing mechanism 1 (4) is provided with a screw hole, and the lock buckle (5) is installed on the fixing mechanism 1 (4) through the screw hole. A spring (9) is provided between the lock buckle (5) and the fixing mechanism 1 (4).

3. The O-type probe structure for detecting tubular workpieces according to claim 1, characterized in that: The contact end I and the contact end II cooperate with each other, and both the contact end I and the contact end II have a stepped structure.

4. The O-type probe structure for detecting tubular workpieces according to claim 1, characterized in that: The contact end I and the contact end II are both provided with a plurality of contact points (10) fixed by bolts.

5. A flaw detector for detecting a tubular workpiece, comprising a flaw detector body, characterized in that: The flaw detector body is connected to the O-type probe structure for detecting tubular workpieces according to any one of claims 1 to 4.

6. A flaw detector for detecting tubular workpieces according to claim 5, characterized in that: The flaw detector body comprises a handle (11) and a shell (12) connected to each other, an E-type coil (13) is provided in the shell (12), a limiting groove is provided at the bottom of the shell (12), the fixing mechanism II (6) is engaged with the shell (12) through the limiting groove, and the fixing block (7) is fixed to the inner wall of the shell (12) by bolts.

7. A flaw detector for detecting tubular workpieces according to claim 6, characterized in that: A C-shaped connecting mechanism (14) is further provided inside the housing (12), and the C-shaped connecting mechanism (14) is fixed to the inner wall of the housing (12) by means of bolts.

8. A flaw detector for detecting tubular workpieces according to claim 7, characterized in that: The C-shaped connecting mechanism (14) is provided with a U-shaped slot (15), and the U-shaped slot (15) cooperates with the lock buckle (5).

9. The flaw detector for detecting tubular workpieces according to claim 6, characterized in that: A button (16) is provided on the outside of the handle (11), an external power interface (17) is provided on the bottom of the handle (11), and a protective cover (18) is provided on the outside of the external power interface (17).

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