CN221237620U - Adjustable guide pin assembly for tube plate weld joint flaw detection and adjustable cross magnetic yoke probe - Google Patents

Abstract

The utility model relates to an adjustable guide pin assembly and an adjustable cross magnetic yoke probe for tube plate weld joint flaw detection, belonging to the technical field of magnetic powder flaw detection in nondestructive detection; the adjustable guide pin structure comprises a guide pin body, wherein an adjustable end of the guide pin body is an arc surface, a working end is a parallel surface, the outer side surface connecting the adjustable end and the working end is longer than the inner side surface, a chute is formed in the adjustable end, and a roller wheel rolling along the inside and the outside is arranged on the working end; the adjustable guide pin assembly comprises a magnetic yoke probe and an electromagnetic coil assembly, and further comprises the adjustable guide pin assembly, wherein convex strips which are matched with sliding grooves are arranged on upper feet at the bottom of the magnetic yoke probe, the upper feet are connected with the adjustable guide pin assembly in a left-right rotating mode, lower feet are further arranged at the bottom of the magnetic yoke probe, and the upper feet and the lower feet form an angle of 90 degrees; the method is suitable for flaw detection of tube plate fillet weld, and ensures the magnetic pole spacing.

Description

Adjustable guide pin assembly for tube plate weld joint flaw detection and adjustable cross magnetic yoke probe

Technical Field

The utility model relates to an adjustable guide pin assembly and an adjustable cross magnetic yoke probe for tube plate weld joint flaw detection, and belongs to the technical field of magnetic powder flaw detection in nondestructive detection.

Background

In industry, magnetic particle inspection can be used for final inspection of finished products to ensure that the work piece does not produce detrimental defects on the surface after various processing steps (e.g., welding, metal heat treatment, grinding). It can also be used for inspecting semi-finished products and raw materials such as bars, billets, forgings, castings, etc. to find out the surface defects existing originally. In transportation departments such as railways, aviation, smelting, chemical industry, power, various mechanical factories and the like, magnetic powder inspection is also commonly adopted for important steel parts when equipment is regularly overhauled so as to find defects such as fatigue cracks and the like generated in use and prevent disastrous accidents from happening in continuous use of the equipment.

The magnetic powder inspection is a nondestructive inspection method for detecting defects on the surface or near-surface of ferromagnetic materials by accumulation of magnetic powder in a leakage magnetic field near the defects. The workpiece made of magnetic materials such as steel is magnetized, and the characteristic that magnetic powder is adsorbed by leakage magnetic energy of the defect part is utilized to display the surface defect and near-surface defect of the detected object according to the distribution of the magnetic powder. The flaw detection method is characterized by simplicity, convenience and visual display, and is an important nondestructive flaw detection method.

Magnetic powder detection is a frequently used method for nondestructive detection, and in the detection of pressure pipelines, a commonly used magnetization method is a yoke method. The yoke method is to use two magnetic poles of a portable electric yoke to contact the surface of a workpiece for local magnetization, and the method is used for finding defects perpendicular to the connecting line of the two magnetic poles. The yoke method has a plurality of advantages in magnetic powder inspection, defects in any direction can be found by changing the orientation of the yoke, but the corresponding defects often require rotating an electromagnetic yoke by 90 degrees for detection in order to find defects in all directions. For large area inspection, blocking is required to accumulate, which is time consuming.

The cross yoke method is to apply a phase-difference current to the electromagnetic yoke assembled by cross lamination of 2 magnets. The electromagnetic yoke thus combined can generate a rotating magnetic field that varies with time. The magnetization direction on the workpiece is continuously changed and rotated, so that defects in all directions can be detected only by one-time magnetization, and the flaw detection efficiency and the flaw detection rate are improved.

As shown in fig. 1, a general cross yoke structure includes:

1-magnetic yoke probe (compatible probe framework)

2-Electromagnetic coil group×4 (corresponding to L1, L2, L3, L4 of the circuit diagram, respectively, for generating rotating magnetic field)

3-Roller x 4 group (additional structure for planar sliding of probe)

The structure is mainly suitable for flaw detection of planar workpieces, and for tube plate fillet weld workpieces, four magnetic poles cannot be in good contact with the workpieces, and the magnetic pole spacing cannot be ensured. So the magnetic powder inspection of the tube plate fillet weld still adopts more magnetic yokes with low efficiency.

For example, chinese patent publication No. CN219369650U discloses an adjustable cross magnetic yoke probe for fillet weld flaw detection, including a magnetic yoke probe body, an adjustable chamfer assembly is provided below the magnetic yoke probe body, the adjustable chamfer assembly includes a roller mechanism and a chamfer angle adjusting mechanism, the roller mechanism is assembled below the chamfer angle adjusting mechanism, the adjustable chamfer assembly includes a first adjustable chamfer assembly and a second adjustable chamfer assembly, a workpiece to be detected includes a first flaw detection surface and a second flaw detection surface, the first adjustable chamfer assembly and the second adjustable chamfer assembly are respectively attached to the first flaw detection surface and the second flaw detection surface.

The device can detect the fillet weld of two parallel planes or two perpendicular planes, but when used for detecting the fillet weld of the cross welding of the pipe and the plate, the lead cannot be regulated to be in good contact with the surface of the detected pipeline due to the symmetry of the magnetic core and the characteristic of the plugging mode, so that the detection of the fillet weld of the pipe and the plate cannot be satisfied. The cross magnetic yoke structure is not suitable for flaw detection of tube plate fillet weld. Therefore, there is a need for an adjustable lead assembly and adjustable cross yoke probe for tube sheet weld inspection that is suitable for tube sheet fillet weld inspection.

Disclosure of utility model

The utility model aims to solve the technical problems that: the adjustable guide leg assembly and the adjustable cross magnetic yoke probe are applicable to flaw detection of tube plate fillet weld, and the magnetic pole spacing is ensured.

The utility model discloses an adjustable guide pin assembly for tube plate weld joint flaw detection, which comprises a guide pin body, wherein an adjustable end of the guide pin body is an arc surface, a working end is a parallel surface, the outer side surface connecting the adjustable end and the working end is longer than the inner side surface, a chute is formed in the adjustable end, and a roller wheel rolling along the inside and the outside is arranged on the working end.

The adjustable end is used for connecting the cross magnetic yoke probe body and can adjust the angle; the working end is used for connecting with a roller, and the roller rolls on the pipe fitting and the plate along the inside and outside; the outer side surface is longer than the inner side surface, so that the roller is adapted to the radian of the pipe fitting and is attached to the cambered surface of the pipe fitting.

Preferably, the rollers are four, and the sliding grooves are two.

Preferably, a through hole is formed in the adjustable end.

The utility model discloses an adjustable cross magnetic yoke probe for tube plate weld joint flaw detection, which comprises a magnetic yoke probe and an electromagnetic coil group, and also comprises the adjustable guide pin assembly, wherein convex strips which are suitable for sliding grooves are arranged on the upper feet at the bottom of the magnetic yoke probe, the upper feet are connected with the adjustable guide pin assembly in a left-right rotating way, the bottom of the magnetic yoke probe is also provided with a lower foot, and the upper feet and the lower feet form an angle of 90 degrees.

The magnetic yoke probe and the electromagnetic coil group are used for magnetic yoke flaw detection, and the sliding groove and the convex strips can slide, so that the distance between the rollers can be adjusted by the adjustable guide pin assembly, and the adjustable guide pin assembly is suitable for different pipe diameters; the bottom four feet of the magnetic yoke probe are used for ensuring accurate cross angles and positions on a non-plane, the outer side surface is longer than the inner side surface and used for keeping the fit state of the magnetic poles and the workpiece, the adjustable guide foot assembly, the upper foot and the two lower feet are combined with each other, and finally the magnetic yoke probe is suitable for flaw detection of tube plate fillet welds and ensures the magnetic pole spacing.

Preferably, the lower foot is connected with a plane guide foot, the upper foot and the adjustable guide foot component are connected in a left-right rotating way through a rotating shaft, the adjustable guide foot component is positioned on the pipe fitting detection surface, and the plane guide foot is positioned on the plate detection surface.

Preferably, the rotating shaft penetrates through the through hole in the adjustable end, and two ends of the rotating shaft are fixed through nuts.

Preferably, the magnetic yoke probe comprises a rectangular surface magnetic yoke probe and four strip-shaped magnetic yoke probe ends connected with four corners of the rectangular surface magnetic yoke probe, the electromagnetic coil group is arranged on the strip-shaped magnetic yoke probe, and the upper foot and the lower foot are connected with the other ends of the strip-shaped magnetic yoke probe.

Preferably, the adjustable pin assembly comprises a left adjustable pin device and a right adjustable pin device, the left adjustable pin device is inclined to the right, and the right adjustable pin device is inclined to the left.

Preferably, the roller is arranged on a roller shaft, a roller connecting piece is arranged on the roller shaft, and the roller connecting piece is fixed through a connecting screw.

Compared with the prior art, the utility model has the following beneficial effects:

The adjustable guide leg assembly and the adjustable cross magnetic yoke probe for tube plate weld joint flaw detection are applied to tube plate fillet weld flaw detection, and the detection efficiency and the detection rate are improved:

The yoke flaw detection needs to be turned by 90 degrees in each local area and magnetized for 2 times. The scheme can carry out continuous flaw detection along the welding line, and the magnetic suspension is sprayed while the adjustable cross magnetic yoke probe is pushed, so that the efficiency is higher.

The magnetic yoke flaw detection needs block flaw detection, the magnetic yoke is difficult to ensure accurate cross angles and positions on a non-plane by manual adjustment every time, the attaching state of the magnetic poles and the workpiece is difficult to be consistent, and the flaw detection is easy to generate. The scheme can continuously move along the welding line for detection in use, does not need to lift the probe to change the position, and is not easy to miss detection.

In addition, the adjustable guide pin assembly can be self-adaptive to various pipe diameters. In the actual detection process of the magnetic yoke flaw detection, the full contact between the magnetic pole and the surface of the part cannot be ensured, so that the magnetic field strength is reduced. This adjustable guide leg subassembly can not receive the influence of pipe fitting diameter, can be better with pipe fitting mutual contact, make on magnetic pole laminating and the cambered surface all the time, promote detection sensitivity and reliability, reduced the degree of difficulty that magnetic pole angle was adjusted.

Drawings

FIG. 1 is a schematic view of a conventional cross yoke structure according to the background of the utility model;

FIG. 2 is a schematic perspective view of an adjustable pin assembly for tube sheet weld inspection according to the present utility model;

FIG. 3 is a schematic top view of an adjustable pin assembly for tube sheet weld inspection according to the present utility model;

FIG. 4 is a schematic perspective view of an adjustable cross yoke probe for tube sheet weld inspection according to the present utility model;

FIG. 5 is a schematic view of the mounting structure of an adjustable pin assembly for tube sheet weld inspection according to the present utility model;

FIG. 6 is a schematic perspective view of a roller according to the present utility model;

FIG. 7 is a schematic perspective view of an operational state of an adjustable cross yoke probe for tube sheet weld inspection according to the present utility model;

FIG. 8 is a schematic top view of an adjustable cross yoke probe for detecting a small-diameter tube sheet for tube sheet weld inspection according to the present utility model;

FIG. 9 is a schematic side view of an operational cross-yoke probe for tube sheet weld inspection according to the present utility model;

FIG. 10 is a schematic elevational structural view of an adjustable cross-yoke probe for tube sheet weld inspection according to the present utility model;

Fig. 11 is a schematic top view of an adjustable cross yoke probe for detecting a large-diameter pipe fitting according to the present utility model.

In the figure: 1. a yoke probe; 101. a convex strip; 102. rectangular face yoke probe; 103. a bar-shaped magnetic yoke probe; 2. an electromagnetic coil assembly; 3. a planar guide pin; 4. an adjustable lead assembly; 401. a lead body; 402. an adjustable end; 403. a working end; 404. an outer side surface; 405. an inner side surface; 406. a through hole; 407. a chute; 5. an upper foot; 6. a lower foot; 7. a roller; 8. a rotating shaft; 801. a nut; 9. a left adjustable pin guide device; 10. right adjustable pin guide device; 11. a roller shaft; 12. a roller connection; 13. a pipe fitting detection surface; 14. and a plate detection surface.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

Example 1

As shown in fig. 2-3, this embodiment discloses an adjustable pin assembly for tube sheet weld inspection, which includes a pin body 401, an adjustable end 402 of the pin body 401 is an arc surface, a working end 403 is a parallel surface, an outer side 404 connecting the adjustable end 402 and the working end 403 is longer than an inner side 405, a chute 407 is opened on the adjustable end 402, and a roller 7 rolling along the inside and the outside is provided on the working end 403.

The adjustable end 402 is used for connecting the cross magnetic yoke probe body and can adjust the angle; the working end 403 is used for connecting with the roller 7, and the roller 7 rolls on the pipe fitting and the plate along the inner and outer directions; the outer side 404 is longer than the inner side 405, so that the roller 7 is adapted to the arc of the pipe fitting and is attached to the arc of the pipe fitting.

Specifically, as shown in fig. 2-3, the rollers 7 may be provided with four, the sliding slots 407 may be provided with two, and of course, the sliding slots 407 may be provided with 3 or 4 or other numbers, which are not limited herein. The adjustable end 402 is internally provided with a through hole 406.

Example 2

As shown in fig. 4-10, this embodiment discloses an adjustable cross yoke probe for tube sheet weld inspection, including yoke probe 1 and solenoid group 2, still include adjustable guide pin subassembly 4 according to embodiment 1, the upper portion foot 5 of yoke probe 1 bottom all is provided with the sand grip 101 that suits with spout 407, and upper portion foot 5 and adjustable guide pin subassembly 4 are connected in the rotation about, the bottom still is provided with lower foot 6, and upper portion foot 5 and lower foot 6 are 90 degrees angle.

According to the characteristic of the cross welding of the different surfaces of the pipe and the plate, the magnetic pole is adjusted in a designed special-shaped magnetic core form, so that the difficulty of magnetic pole adjustment is reduced; specifically, according to the characteristic that one detected surface is a cambered surface of a pipeline, a left cambered surface guide pin and a right cambered surface guide pin (a left adjustable guide pin device 9 and a right adjustable guide pin device 10) are designed, the contact area with the detected surface is enlarged, the pipeline with different calibers is self-adaptive, meanwhile, the pipeline with different calibers can be better contacted with the cambered surface of the pipe fitting, the sensitivity and the reliability of detection are improved, and furthermore, according to the characteristic that the calibers of the detected pipe fitting are different, the guide pins (the left adjustable guide pin device 9 and the right adjustable guide pin device 10) are designed into special shapes and asymmetric shapes, and the stable magnetic path distance is ensured when the pipelines with different calibers are detected (as shown in fig. 8 and 11).

The magnetic yoke probe 1 and the electromagnetic coil group 2 are used for magnetic yoke flaw detection, and the sliding chute 407 and the convex strips 101 can slide, so that the distance between the rollers 7 can be adjusted by the adjustable guide pin assembly 4, and the adjustable guide pin assembly is suitable for different pipe diameters; the bottom four feet of the magnetic yoke probe 1 are used for ensuring accurate crossing angles and positions on a non-plane, the outer side 404 is longer than the inner side 405 and used for keeping the fitting state of magnetic poles and workpieces, the adjustable guide foot assembly 4, the upper foot 5 and the lower foot 6 are combined with each other, and finally, the magnetic yoke probe is suitable for flaw detection of tube plate fillet welds and ensures the magnetic pole spacing.

Here, the upper foot 5 and the lower foot 6 may be interchanged as long as the upper foot 5 and the lower foot 6 are held at an angle of 90 degrees, that is, the upper foot 5 and the lower foot 6 are perpendicular to the tube detection surface 13 and the other is perpendicular to the panel detection surface 14. In order to adapt to different detection surfaces, the adjustable pin assembly 4 is positioned on the pipe detection surface 13, and the plane pin 3 is positioned on the plate detection surface 14.

As shown in fig. 8, the adjustable lead assembly 4 includes a left adjustable lead device 9 and a right adjustable lead device 10, the left adjustable lead device 9 is inclined to the right, and the right adjustable lead device 10 is inclined to the left, so as to achieve the fit between the adjustable lead assembly 4 and the pipe fitting.

In order to realize the connection between the adjustable guide pin assembly 4 and the bottom upper pin 5 of the magnetic yoke probe 1, the bottom upper pin 5 of the magnetic yoke probe 1 is rotationally connected with the adjustable guide pin assembly 4 through a rotating shaft 8.

In order to realize the rotary connection between the upper leg 5 and the adjustable leg assembly 4 through the rotary shaft 8, the rotary shaft 8 passes through the through hole 406 in the adjustable end 402, and two ends of the rotary shaft 8 are fixed through nuts 801.

In order to support and fit the plate, the lower leg 6 is connected with a planar lead 3.

In order to realize the design of four feet at the bottom of the magnetic yoke probe 1, the magnetic yoke probe 1 comprises a rectangular surface magnetic yoke probe 102 and four strip-shaped magnetic yoke probes 103 connected with four corners of the rectangular surface magnetic yoke probe 102, the electromagnetic coil group 2 is arranged on the strip-shaped magnetic yoke probe 103, and the upper foot 5 and the lower foot 6 are connected with the other end of the strip-shaped magnetic yoke probe 103.

Specifically, the upper foot 5 and the lower foot 6 are at a 90 degree angle, as shown in fig. 9, in order to maintain an accurate crossing angle. The upper leg 5 and the lower leg 6 may be the same two legs, i.e., the upper leg 5 may be attached to the pipe member and the lower leg 6 may be attached to the plate member, or the upper leg 5 may be attached to the plate member and the lower leg 6 may be attached to the pipe member.

The magnetic poles are tightly attached to the cambered surface of the detected pipeline by adjusting the adjustable guide pin assembly 4. The magnetic pole spacing is ensured by the four feet at the bottom of the magnetic yoke probe 1.

As shown in fig. 6, the rollers 7 are provided in two groups on each of the adjustable lead assemblies 4. In order to realize the installation of the roller 7, the roller 7 is arranged on a roller shaft 11, a roller connecting piece 12 is arranged on the roller shaft 11, and the roller connecting piece 12 is fixed by a connecting screw. Here, the roller 7 may have the same structure on the adjustable lead frame 4 and the planar lead frame 3, and both the left and right scrolling is completed.

Of course, the foregoing is merely preferred embodiments of the present utility model and is not to be construed as limiting the scope of the embodiments of the present utility model. The utility model is not limited to the above examples, and the utility model claims the design principle of the adjustable guide pin assembly and the adjustable cross magnetic yoke probe for tube plate weld inspection or the design scheme of the same kind of functions; equivalent changes and modifications within the spirit and scope of the present utility model will occur to those skilled in the art from the present utility model.

Claims (9)

1. An adjustable guide pin assembly for tube plate weld joint flaw detection is characterized by comprising a guide pin body (401), wherein an adjustable end (402) of the guide pin body (401) is an arc surface, a working end (403) is a parallel surface, an outer side surface (404) connecting the adjustable end (402) and the working end (403) is longer than an inner side surface (405), a chute (407) is formed in the adjustable end (402), and a roller (7) rolling along the inside and the outside is arranged on the working end (403).

2. The adjustable lead assembly for tube sheet weld inspection according to claim 1, wherein the rollers (7) are provided with four and the runner (407) is provided with two.

3. The adjustable lead assembly for tube sheet weld inspection of claim 1, wherein the adjustable end (402) is internally provided with a through hole (406).

4. An adjustable cross magnetic yoke probe for tube sheet weld joint flaw detection, comprises a magnetic yoke probe (1) and an electromagnetic coil group (2), and is characterized by further comprising an adjustable guide pin assembly (4) according to any one of claims 1-3, wherein the upper feet (5) at the bottom of the magnetic yoke probe (1) are respectively provided with a raised strip (101) which is matched with a sliding groove (407), the upper feet (5) are connected with the adjustable guide pin assembly (4) in a left-right rotation manner, the bottom is further provided with a lower foot (6), and the upper feet (5) and the lower feet (6) are in 90-degree angles.

5. The adjustable cross magnetic yoke probe for tube sheet weld joint flaw detection according to claim 4, wherein the lower leg (6) is connected with a plane guide leg (3), the upper leg (5) and the adjustable guide leg assembly (4) are connected in a left-right rotation manner through a rotating shaft (8), the adjustable guide leg assembly (4) is located on a tube detection surface (13), and the plane guide leg (3) is located on a plate detection surface (14).

6. The adjustable cross yoke probe for tube sheet weld inspection according to claim 5, wherein the rotating shaft (8) passes through a through hole (406) inside the adjustable end (402), and both ends of the rotating shaft (8) are fixed by nuts (801).

7. The adjustable cross yoke probe for tube sheet weld inspection according to claim 4, wherein the yoke probe (1) comprises a rectangular face yoke probe (102) and four bar yoke probe (103) ends connected with four corners of the rectangular face yoke probe (102), the electromagnetic coil group (2) is arranged on the bar yoke probe (103), and the upper leg (5) and the lower leg (6) are connected with the other ends of the bar yoke probe (103).

8. The adjustable cross yoke probe for tube sheet weld inspection according to claim 4, wherein the adjustable pin assembly (4) comprises a left adjustable pin device (9) and a right adjustable pin device (10), the left adjustable pin device (9) being inclined to the right and the right adjustable pin device (10) being inclined to the left.

9. The adjustable cross yoke probe for tube sheet weld inspection according to claim 5, wherein the roller (7) is arranged on a roller shaft (11), a roller connecting piece (12) is arranged on the roller shaft (11), and the roller connecting piece (12) is fixed by a connecting screw.