A roller stand ACFM probe

Abstract

The utility model discloses a kind of gyro wheel support ACFM probe, including outer hoop, sliding mechanism and detection mechanism;Outer hoop: it is equipped with two, two outer hoops are fixedly connected with support between the front and rear ends, the overall of support and outer hoop is equipped with two, the upper and lower sides between the front end of the overall of two supports and outer hoop are fixedly connected with connecting block, positioning mechanism is arranged between the rear end of the overall of two supports and outer hoop;Sliding mechanism: it includes slide column one, steel ball, ball seat and connecting seat one, the front and rear sides of the outer hoop are equipped with connecting seat one, the front and rear sides of connecting seat one are slidably connected with slide column one, this gyro wheel support ACFM probe, through suitable auxiliary support to keep the stable movement of probe is more conducive to reduce the noise influence caused by shaking in moving process of probe, more conducive to subsequent signal processing and quantization work, while auxiliary support can cooperate with different diameter cylinder, more widely applicable.

Description

Technical Field

[0001] This utility model relates to the field of ACFM probe technology, specifically to a roller bracket ACFM probe. Background Technology

[0002] ACFM (Alternating Current Field Measurement) is a non-destructive testing technique based on electromagnetic principles. It identifies crack locations and sizes by applying an alternating current to the surface of the metal being tested and utilizing the magnetic field distortion characteristics at the defect location (such as changes in Bx and Bz signals). Its advantages include being non-contact, requiring no surface preparation, capable of inspecting complex-shaped parts, and suitable for harsh environments such as high temperatures and underwater. It is widely used in oil and gas pipelines, ships, nuclear power plants, and other fields, capable of detecting surface and near-surface defects with millimeter-level accuracy.

[0003] The ACFM probe is the core component of the technology, consisting of an excitation coil and an induction coil. It is used to generate alternating current and capture magnetic field distortion signals. The lower part of the ACFM probe housing houses the magnetic core, and the upper part houses the circuit adapter board. In actual testing, the lower end of the ACFM probe is equipped with a retainer. The retainer is arc-shaped and slides on the surface of the cylinder being tested. Testing is achieved by moving the ACFM probe by hand. However, hand-holding results in poor stability and generates noise. The noise significantly affects the quantization of the defect signal. Furthermore, the retainer needs to be replaced according to the diameter of the cylinder being tested, which is quite troublesome. Therefore, we propose a roller bracket ACFM probe. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a roller bracket ACFM probe. By using a suitable auxiliary bracket to maintain the stable movement of the probe, it is more conducive to reducing the noise caused by the vibration of the probe during movement, which is more conducive to subsequent signal processing and quantization. At the same time, the auxiliary bracket can be used with columns of different diameters, making it more applicable and effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a roller bracket ACFM probe, comprising an outer hoop, a sliding mechanism, and a detection mechanism;

[0006] Outer hoop: There are two of them. The front and rear ends of the two outer hoops are fixedly connected to the brackets. The brackets and outer hoops are combined into two units. The upper and lower sides of the front end of the two brackets and outer hoops are fixedly connected to the connecting blocks. The rear end of the two brackets and outer hoops is provided with a positioning mechanism.

[0007] Sliding mechanism: It includes a sliding column, a steel ball, a ball seat and a connecting seat. The front and rear sides of the outer hoop are provided with connecting seats. The front and rear sides of the connecting seat are slidably connected with sliding columns. The two sliding columns located on the same connecting seat are fixedly connected to the end facing the center of the outer hoop. The inside of the end of the ball seat facing the center of the outer hoop is slidably connected with a steel ball.

[0008] The testing mechanism is located between two supports at the front end. Using appropriate auxiliary supports to maintain the stable movement of the probe is more conducive to reducing the noise caused by vibration during the movement of the probe, which is more conducive to subsequent signal processing and quantization. At the same time, the auxiliary supports can be used with columns of different diameters, making it more versatile.

[0009] Furthermore, the sliding mechanism also includes an adjusting bolt. Each connecting seat is threaded with an adjusting bolt. The end of the adjusting bolt facing the center of the outer hoop contacts the side of the adjacent connecting seat away from the center of the outer hoop, thereby adjusting the position of the ball seat.

[0010] Furthermore, the sliding mechanism also includes an anti-detachment plate. The anti-detachment plate is fixedly connected between the ends of the two sliding columns located on the same connecting seat and away from the center of the outer hoop. The ends of the adjusting bolts away from the center of the outer hoop pass through the through holes in the middle of the adjacent anti-detachment plates to prevent the sliding columns from falling off.

[0011] Furthermore, the detection mechanism includes fixed screw posts, a housing, a circuit adapter plate, a magnetic core, and a connector. A support is fixedly connected to the rear end of the housing. The two front supports have sliding grooves in the middle of their opposite inner sides. The support is slidably connected between the two sliding grooves. The upper and lower sides of the rear end of the support have symmetrically distributed semi-circular plates. The upper and lower inner walls of the housing have symmetrically distributed fixed screw posts. The central axes of vertically adjacent fixed screw posts are collinear. The magnetic core is inserted between the fixed screw posts and the housing. A circuit adapter plate is provided at the upper end of the housing. A connector is fixedly connected to the right side of the housing. The input end of the circuit adapter plate is electrically connected to the output end of the connector to realize the detection.

[0012] Furthermore, the positioning mechanism includes a positioning seat, two sliding columns, a positioning plate, two adjusting bolts, and two anti-detachment plates. The positioning seat is fixedly connected between the rear ends of the integral assembly consisting of two brackets and an outer hoop. Two sliding columns, symmetrically distributed vertically, are slidably connected to the middle of the positioning seat. A positioning plate is fixedly connected between the front ends of the two sliding columns, and an anti-detachment plate is fixedly connected between the rear ends of the two sliding columns. Two adjusting bolts are threadedly connected to the middle of the positioning seat. The front end of the two adjusting bolts contacts the rear side of the positioning plate, and the rear end of the two adjusting bolts passes through the round hole in the middle of the anti-detachment plate, thus fixing the position of the integral assembly consisting of the brackets and the outer hoop.

[0013] Furthermore, the front support is provided with a clearance groove in the middle, and the joint is located inside the clearance groove on the right side to avoid interference between the joint and the support.

[0014] Furthermore, the upper and lower ends of the front bracket are provided with horizontally evenly distributed fixing holes, and the fixing holes at the rear end are threaded with positioning bolts. The studs of the positioning bolts contact the adjacent sides of the bracket to fix the bracket.

[0015] Furthermore, a handrail is fixedly connected between the middle of the outer arc surfaces of the two outer hoops of the whole consisting of the bracket and the outer hoop, making it easy to hold the whole consisting of the bracket and the outer hoop.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This roller bracket ACFM probe has the following advantages:

[0017] 1. The steel ball contacts the outer arc surface of the column being tested. Each adjusting bolt is rotated to ensure that the entire assembly of the bracket and outer hoop slides smoothly on the outer arc surface of the column without any shaking or obstruction. The semi-circular plate reduces the contact area with the column, thus reducing resistance and noise generated when the support slides on the outer arc surface of the column being tested. The magnetic core is inserted between the fixing screw post and the outer shell, preventing the magnetic core from shaking inside the outer shell, thereby reducing the generation of noise signals.

[0018] 2. The symmetrical semicircular plates facilitate alignment with columns of different diameters. By adjusting the position of the ball seat with the adjusting bolts, the steel ball can contact the outer arc surface of columns of different diameters, thus enabling the detection of different columns. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the outer shell and the support of this utility model;

[0021] Figure 3 This is a schematic diagram of the positioning mechanism of this utility model;

[0022] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of the testing mechanism of this utility model.

[0024] In the diagram: 1 Outer hoop, 2 Bracket, 3 Connecting block, 4 Sliding mechanism, 41 Sliding column one, 42 Steel ball, 43 Adjusting bolt one, 44 Ball seat, 45 Anti-detachment plate one, 46 Connecting seat one, 5 Positioning mechanism, 51 Positioning seat, 52 Sliding column two, 53 Positioning plate, 54 Adjusting bolt two, 55 Anti-detachment plate two, 6 Sliding groove, 7 Detection mechanism, 71 Fixing screw column, 72 Outer shell, 73 Circuit adapter plug, 74 Magnetic core, 75 Connector, 8 Support, 9 Handrail, 10 Semicircular plate, 11 Clearance groove, 12 Fixing hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 This embodiment provides a technical solution: a roller bracket ACFM probe, including an outer hoop 1, a sliding mechanism 4, and a detection mechanism 7;

[0027] Outer hoop 1: There are two of them. A bracket 2 is fixedly connected between the front and rear ends of each outer hoop 1. The bracket 2 and outer hoop 1 form a whole. Connecting blocks 3 are fixedly connected between the upper and lower sides of the front end of the whole formed by the bracket 2 and outer hoop 1. A positioning mechanism 5 is provided between the rear ends of the whole formed by the bracket 2 and outer hoop 1. The positioning mechanism 5 includes a positioning seat 51, a sliding column 52, a positioning plate 53, an adjusting bolt 54, and an anti-detachment plate 55. The positioning seat 51 is fixedly connected to the two brackets 2 and outer hoop 1. Between the rear ends of the entire assembly, the middle of the positioning seat 51 is slidably connected to two symmetrically distributed sliding columns 52. A positioning plate 53 is fixedly connected between the front ends of the two sliding columns 52, and an anti-detachment plate 55 is fixedly connected between the rear ends of the two sliding columns 52. An adjusting bolt 54 is threadedly connected to the middle of the positioning seat 51. The front end of the adjusting bolt 54 contacts the rear side of the positioning plate 53, and the rear end of the adjusting bolt 54 passes through the round hole in the middle of the anti-detachment plate 55. The two outer hoops 1, which form the integral assembly of the bracket 2 and the outer hoop 1, are connected at the middle of their outer arc surfaces. The handrail 9 is fixedly connected. After adjustment, rotate the adjusting bolt 54. The stud of the adjusting bolt 54 pushes the positioning seat 51 towards the center of the outer hoop 1. The sliding column 52 is driven by the positioning seat 51 to slide synchronously. The front side of the positioning plate 53 is provided with anti-slip texture. The anti-slip texture contacts the outer arc surface of the column being tested. The stud of the adjusting bolt 54 tightens the positioning plate 53, fixing the whole assembly of the bracket 2 and the outer hoop 1 onto the column being tested. The whole assembly of the support 8 and the semi-circular plate 10 is inserted between the two sliding grooves 6. The outer arc surface of the semicircular plate 10 is in contact with the outer arc surface of the column being tested. The contact area between the outer arc surface of the semicircular plate 10 and the outer arc surface of the column being tested is small, resulting in less resistance and smoother sliding. Then, the positioning bolts are screwed into the fixing holes 12 closest to the support 8 to tighten the support 8 and fix the support 8. The joint 75 is located inside the clearance groove 11 on the right side to avoid interference. By changing the fixed position of the support 8 between the two sliding grooves 6 and adjusting the position of the ball seat 44, the detection of columns of different diameters within a certain range can be achieved.

[0028] Sliding mechanism 4 includes a sliding column 41, a steel ball 42, a ball seat 44, and a connecting seat 46. Connecting seats 46 are provided on both the front and rear sides of the outer hoop 1. Sliding columns 41 are slidably connected to both the front and rear sides of each connecting seat 46. A ball seat 44 is fixedly connected between the ends of two sliding columns 41 on the same connecting seat 46 facing the center of the outer hoop 1. A steel ball 42 is slidably connected inside the end of each ball seat 44 facing the center of the outer hoop 1. Sliding mechanism 4 also includes an adjusting bolt 43. An adjusting bolt 43 is threadedly connected to the middle of each connecting seat 46. The end of the adjusting bolt 43 facing the center of the outer hoop 1 contacts the side of the adjacent connecting seat 46 away from the center of the outer hoop 1. Sliding mechanism 4 also includes an anti-detachment plate 45. An anti-detachment plate 45 is fixedly connected between the ends of two sliding columns 41 on the same connecting seat 46 away from the center of the outer hoop 1. The ends away from the center of the outer hoop 1 pass through the through holes in the middle of the adjacent anti-detachment plates 45, and fasten the whole consisting of the two brackets 2 and the outer hoop 1 to the outer arc surface of the column to be tested. The front end of the whole consisting of the two brackets 2 and the outer hoop 1 is fixedly connected by the connecting blocks 3 distributed symmetrically on the upper and lower sides. The rear end of the whole consisting of the two brackets 2 and the outer hoop 1 is fixedly connected by the positioning seat 51. Then, the adjusting bolts 43 are rotated respectively. The stud of the adjusting bolts 43 pushes the adjacent connecting seat 46 towards the center of the outer hoop 1. The sliding column 41 is driven to slide synchronously by the connecting seat 46. The outer arc surface of the steel ball 42 contacts the outer arc surface of the column to be tested. The handle 9 drives the whole consisting of the brackets 2 and the outer hoop 1 to rotate, and drives the steel ball 42 to slide on the outer arc surface of the column to be tested. Adjust each adjusting bolt 43 respectively so that the sliding of the brackets 2 and the outer hoop 1 will not wobble or feel blocked.

[0029] Testing mechanism 7: It is located between the two supports 2 at the front end. Testing mechanism 7 includes fixing screw posts 71, housing 72, circuit adapter plate 73, magnetic core 74 and connector 75. The rear end of housing 72 is fixedly connected to support 8. The middle of the opposite inner side of the two supports 2 at the front end is provided with sliding grooves 6. Support 8 is slidably connected between the two sliding grooves 6. The upper and lower sides of the rear end of support 8 are provided with symmetrically distributed semi-circular plates 10. The upper and lower inner walls of housing 72 are provided with symmetrically distributed fixing screw posts 71. Vertically adjacent fixing screw posts 71 The central axes are collinear. The magnetic core 74 is inserted between the fixing screw post 71 and the outer shell 72. The upper end of the outer shell 72 is provided with a circuit adapter plate 73. The right side of the outer shell 72 is fixedly connected to a connector 75. The input end of the circuit adapter plate 73 is electrically connected to the output end of the connector 75. The middle part of the front bracket 2 is provided with a relief groove 11. The connector 75 is located inside the relief groove 11 on the right side. The upper and lower ends of the front bracket 2 are provided with horizontally evenly distributed fixing holes 12. The fixing holes 12 at the rear end are threaded with positioning bolts. The studs of the positioning bolts are... The support 8 contacts the adjacent sides of the support 8. During testing, the handrail 9 drives the entire assembly of the support 2 and outer hoop 1 to slide on the outer arc surface of the column being tested. An external controller supplies alternating current through connector 75. The alternating current enters the circuit adapter plate 73 through connector 75 (the front side of the circuit adapter plate 73 is equipped with an excitation coil, which supplies alternating current to a solenoid at a certain distance from the surface of the column being tested to form the excitation coil). When the support 8 rotates on the outer arc surface of the column being tested, the circuit adapter plate 73 rotates synchronously, and the alternating current excitation... When the coil is close to the conductor, the alternating current generates an alternating magnetic field in the surrounding space. Due to the skin effect, the induced current on the outer arc surface of the cylinder being tested is concentrated on the surface of the workpiece. When there are no defects in the workpiece, the induced current lines are parallel to each other, and the outer arc surface of the cylinder being tested generates a uniform magnetic field due to the magnetic core 74. If there are defects in the cylinder being tested, the change in resistivity will inevitably affect the current distribution. The current lines will deflect near the defect, and the magnetic field on the surface of the workpiece will be distorted. Detection is achieved by detecting the change in the alternating current.

[0030] The working principle of the ACFM probe with roller bracket provided by this utility model is as follows: The entire assembly consisting of two brackets 2 and an outer hoop 1 is fastened to the outer arc surface of the column to be tested. The front end of the assembly consisting of the two brackets 2 and the outer hoop 1 is fixedly connected by symmetrically distributed connecting blocks 3. The rear end of the assembly consisting of the two brackets 2 and the outer hoop 1 is fixedly connected by a positioning seat 51. Then, the adjusting bolt 43 is rotated. The stud of the adjusting bolt 43 pushes the adjacent connecting seat 46 towards the center of the outer hoop 1. The sliding column 41 is driven to slide synchronously by the connecting seat 46. The outer arc surface of the steel ball 42 contacts the outer arc surface of the column to be tested. The handle 9 drives the entire assembly consisting of the brackets 2 and the outer hoop 1 to rotate, thus driving... The steel ball 42 slides on the outer arc surface of the column being tested. Adjusting each adjusting bolt 43 ensures that the support 2 and outer hoop 1 slide smoothly without wobbling or obstruction. After adjustment, rotating adjusting bolt 54 causes the stud of adjusting bolt 54 to push the positioning seat 51 towards the center of the outer hoop 1. The sliding column 52 is driven by the positioning seat 51 to slide synchronously. The front side of the positioning plate 53 has anti-slip textures that contact the outer arc surface of the column being tested. The stud of adjusting bolt 54 tightens the positioning plate 53, fixing the support 2 and outer hoop 1 together onto the column being tested. The support 8 and semi-circular plate 10 are then inserted between the two sliding grooves 6, with the outer arc surface of the semi-circular plate 10 aligned with the outer arc surface of the column. The outer arc surface of the column being tested contacts the outer arc surface of the semicircular plate 10. The contact area between the outer arc surface of the semicircular plate 10 and the outer arc surface of the column being tested is small, resulting in less resistance and smoother sliding. Then, the positioning bolts are screwed into the fixing holes 12 closest to the support 8 to tighten the support 8, thus fixing it. The joint 75 is located inside the right-side clearance groove 11 to avoid interference. By changing the fixed position of the support 8 between the two sliding grooves 6 and adjusting the position of the ball seat 44, the testing of columns of different diameters within a certain range can be achieved. Before testing, the adjusting bolt 2 54 is rotated in the opposite direction to move the positioning plate 53 away from the column being tested. During testing, the handrail 9 is held to drive the entire assembly of the support 2 and the outer hoop 1 to slide on the outer arc surface of the column being tested. The controller is supplied with alternating current through connector 75. The alternating current enters circuit adapter plate 73 through connector 75 (the front side of circuit adapter plate 73 is provided with an excitation coil, and an alternating current is supplied to a solenoid that is a certain distance away from the surface of the column being tested to form an excitation coil). When the support 8 rotates on the outer arc surface of the column being tested, the circuit adapter plate 73 rotates synchronously. When the excitation coil carrying alternating current approaches the conductor, the alternating current generates an alternating magnetic field in the surrounding space. Due to the skin effect, the induced current on the outer arc surface of the column being tested is concentrated on the surface of the workpiece. When there are no defects in the workpiece, the induced current lines are parallel to each other. The outer arc surface of the column being tested generates a uniform magnetic field due to the magnetic core 74.If a defect exists in the column being inspected, the change in resistivity will inevitably affect the current distribution. The current lines will deflect near the defect, and the magnetic field on the workpiece surface will be distorted. Detection is achieved by detecting the change in the applied alternating current. When the ACFM probe of this roller bracket is not used, anti-detachment plate 45 and anti-detachment plate 55 respectively prevent slide column 41 from detaching from ball seat 44 and slide column 52 from detaching from positioning seat 51.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A roller-supported ACFM probe, characterized in that: It includes an outer hoop (1), a sliding mechanism (4), and a detection mechanism (7); Outer hoop (1): There are two of them. The front and rear ends of the two outer hoops (1) are fixedly connected to the brackets (2). The brackets (2) and the outer hoops (1) are two in total. The upper and lower sides of the front end of the two brackets (2) and the outer hoops (1) are fixedly connected to the connecting blocks (3). The rear end of the two brackets (2) and the outer hoops (1) is provided with a positioning mechanism (5). Sliding mechanism (4): It includes a sliding column (41), a steel ball (42), a ball seat (44) and a connecting seat (46). The front and rear sides of the outer hoop (1) are provided with connecting seats (46). The front and rear sides of the connecting seat (46) are slidably connected with sliding columns (41). The two sliding columns (41) located in the same connecting seat (46) are fixedly connected to the end of the outer hoop (1) at one end. The ball seat (44) at one end of the outer hoop (1) at one end is slidably connected with a steel ball (42). Testing mechanism (7): It is located between the two supports (2) at the front end.

2. The ACFM probe with roller bracket according to claim 1, characterized in that: The sliding mechanism (4) also includes an adjusting bolt (43). The middle part of each connecting seat (46) is threaded with an adjusting bolt (43). The end of the adjusting bolt (43) facing the center of the outer hoop (1) contacts the side of the adjacent connecting seat (46) away from the center of the outer hoop (1).

3. The ACFM probe with a roller bracket according to claim 2, characterized in that: The sliding mechanism (4) also includes an anti-detachment plate (45). The anti-detachment plate (45) is fixedly connected between the ends of the two sliding columns (41) located in the same connecting seat (46) away from the center of the outer hoop (1). The end of the adjusting bolt (43) away from the center of the outer hoop (1) passes through the through hole in the middle of the adjacent anti-detachment plate (45).

4. The ACFM probe with roller bracket according to claim 1, characterized in that: The detection mechanism (7) includes a fixing screw post (71), a housing (72), a circuit adapter plate (73), a magnetic core (74), and a connector (75). The rear end of the housing (72) is fixedly connected to a support (8). The two supports (2) at the front end are provided with a sliding groove (6) in the middle of their opposite inner sides. The support (8) is slidably connected between the two sliding grooves (6). The upper and lower sides of the rear end of the support (8) are provided with symmetrically distributed semi-circular plates (10). The upper and lower inner walls of the housing (72) are provided with symmetrically distributed fixing screw posts (71). The central axes of vertically adjacent fixing screw posts (71) are collinear. The magnetic core (74) is inserted between the fixing screw post (71) and the housing (72). The upper end of the housing (72) is provided with a circuit adapter plate (73). The right side of the housing (72) is fixedly connected to a connector (75). The input end of the circuit adapter plate (73) is electrically connected to the output end of the connector (75).

5. The ACFM probe with roller bracket according to claim 1, characterized in that: The positioning mechanism (5) includes a positioning seat (51), a sliding column (52), a positioning plate (53), an adjusting bolt (54), and an anti-detachment plate (55). The positioning seat (51) is fixedly connected between the rear ends of the whole consisting of two brackets (2) and an outer hoop (1). The middle part of the positioning seat (51) is slidably connected to the sliding column (52) which is symmetrically distributed vertically. The front ends of the sliding column (52) are fixedly connected to the positioning plate (53). The rear ends of the sliding column (52) are fixedly connected to the anti-detachment plate (55). The middle part of the positioning seat (51) is threadedly connected to the adjusting bolt (54). The front end of the adjusting bolt (54) contacts the rear side of the positioning plate (53). The rear end of the adjusting bolt (54) passes through the round hole in the middle of the anti-detachment plate (55).

6. The ACFM probe with roller bracket according to claim 4, characterized in that: The front bracket (2) has a relief groove (11) in the middle, and the connector (75) is located inside the relief groove (11) on the right side.

7. The ACFM probe with roller bracket according to claim 4, characterized in that: The upper and lower ends of the front bracket (2) are provided with horizontally evenly distributed fixing holes (12), and the fixing holes (12) at the rear end are threaded with positioning bolts. The studs of the positioning bolts contact the adjacent sides of the support (8).

8. The ACFM probe with roller bracket according to claim 1, characterized in that: Handrails (9) are fixedly connected between the middle of the outer arc surfaces of the two outer hoops (1) that make up the whole of the bracket (2) and the outer hoop (1).

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