CN216117450U - Cross magnetic field magnetic particle flaw detector of self-adaptation curved surface - Google Patents

Abstract

The utility model discloses a cross magnetic field magnetic powder flaw detector with a self-adaptive curved surface, which comprises a magnetic yoke for realizing magnetization of cross magnetic yoke iron cores, wherein a detachable magnetic pole adjusting device is arranged at the position of a magnetic pole on the magnetic yoke of the cross magnetic yoke iron core, a magnetic yoke connecting plate is arranged on the upper end surface of the magnetic yoke, an installing plate is arranged on the magnetic yoke connecting plate, and an elastic supporting piece for ensuring that each magnetic yoke iron core is always attached to the curved surface to be detected is arranged between the installing plate and the magnetic yoke connecting plate. The bending surface detection device is reasonable in design, can better detect the bending surface, has a better detection effect, is convenient to disassemble and install, is convenient for later maintenance and replacement, and can meet the use requirement.

Description

Cross magnetic field magnetic particle flaw detector of self-adaptation curved surface

Technical Field

The utility model relates to the technical field of nondestructive testing equipment, in particular to a crossed magnetic field magnetic powder flaw detector with a self-adaptive curved surface.

Background

Non-destructive inspection instruments are known, which refer to a type of inspection instrument that does not damage or affect the future use properties or applications of a material or a workpiece. The magnetic particle flaw detector can find defects in the interior and on the surface of a material or a workpiece, can measure the interior composition, the structure, the physical properties, the state and the like of the material or the workpiece, and is one of nondestructive testing, wherein the basic principle of the magnetic particle flaw detection is as follows: after the ferromagnetic material and the workpiece are magnetized, magnetic lines of force on the surface or near the surface of the workpiece are subjected to local distortion due to the existence of defects to generate a leakage magnetic field, so that magnetic powder applied to the surface of the workpiece is adsorbed, visible magnetic traces under proper illumination are formed, and the position, shape and size of the defects are displayed.

The magnetic particle flaw detector is used for detecting the surface and near-surface defects of iron products, a probe of the magnetic particle flaw detector can generate a magnetic field, the probe is attached to the detected surface, and the magnetic field is applied to carry out magnetic particle flaw detection. The magnetic particle flaw detector is a cross magnetic field magnetic particle flaw detector, which is an instrument for performing magnetic particle flaw detection by forming a cross magnetic field through two crossed iron cores, wherein the cross magnetic field magnetic particle flaw detector performs flaw detection by applying alternating-current magnetic fields with equal frequency and intensity to the two crossed iron cores, coils are wound on the iron cores, each iron core of the cross magnetic field magnetic particle flaw detector is provided with two probe pins, and the total number of the probe pins is four, and each path of alternating-current magnetic field is guided to a detected surface through the probe pins.

In the existing crossed magnetic field magnetic particle flaw detector, two iron cores are rigidly connected, four probe pins are in the same plane, and the four probe pins of the probe structure can simultaneously contact the detected surface when the detected surface is a flat surface, but in the actual detection, the detected surface has curvature, while the four probe pins of the existing crossed magnetic field magnetic particle flaw detector are in the same plane, when the detection is performed on a curved surface, the four probe pins can not simultaneously contact the detected surface, sometimes even only two probe pins can contact the detected surface, so that the magnetic force can not be sufficiently guided to the detected surface through the probe pins, false detection and missed detection are caused, and serious potential safety hazards are caused. Also as the chinese utility model patent of the bulletin number of CN210109028U discloses a cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector, two iron cores of magnetic particle flaw detector probe pass through spliced pole sliding connection on the shell, and the iron core can reciprocate in the shell like this, and the spliced pole corresponds the setting with every probe foot, makes every probe foot on the iron core all can be from top to bottom

Remove, adaptable surface by surveying, even by the surperficial unevenness of surveying, every probe also can laminate by survey on the surface, in addition, be provided with pretension spring between shell and the iron core, can compress tightly the probe by surveying on the surface, though this kind of probe foot can be on the coplanar, be favorable to the surperficial unevenness of surveying, but the removal of this kind of probe unable suitable curved surface, consequently the effect is not very good when detecting on the plane of bending, and also not quick detachable, be unfavorable for the maintenance and the change in later stage, can't satisfy the user demand.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the crossed magnetic field magnetic particle flaw detector with the self-adaptive curved surface, which is reasonable in design, can better detect the curved surface, has a better detection effect, is convenient to disassemble and install, is convenient for later maintenance and replacement, and can better meet the use requirement.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a cross magnetic field magnetic particle flaw detector of self-adaptation curved surface, is including the yoke that is used for realizing magnetization cross yoke iron core the magnetic pole position department installs detachable magnetic pole adjusting device on the yoke, the yoke up end is provided with the yoke connecting plate, be provided with the mounting panel on the yoke connecting plate, the mounting panel with be provided with between the yoke connecting plate and be used for guaranteeing that every yoke iron core is hugged closely all the time at the elastic support piece who is detected on the curved surface.

Preferably, the magnetic pole adjusting device comprises a soft magnetic matching block arranged on the magnetic pole position on the magnetic yoke of the crossed magnetic yoke iron core, a first bearing and a second bearing are arranged at two ends of the soft magnetic matching block, the first bearing, the soft magnetic matching block and the second bearing are connected together in series through a bearing shaft, and meanwhile, a nut is arranged on the bearing shaft.

Preferably, the soft magnetic matching block is fixed on the lower end face of the magnetic pole of the magnetic yoke by a mounting screw.

Preferably, the soft magnetic matching block is a ferrite soft magnetic matching block.

Preferably, the crossed yoke cores are specifically at least two yoke cores, the two yoke cores are distributed in a crossed manner, each yoke core has two magnetic poles, that is, two ends of the two yoke cores have four magnetic poles, the number of the magnetic pole adjusting devices is four, and each magnetic pole adjusting device corresponds to and is consistent with each magnetic pole.

Preferably, the number of the elastic supports corresponds to the number of the magnetic pole adjusting devices.

Preferably, the elastic support member comprises a guide sleeve arranged on the lower end face of the mounting plate and a guide pillar arranged on the upper end face of the yoke connecting plate, the guide pillar is arranged in the guide sleeve, a spring is arranged on the guide pillar, and a limiting part is arranged on the guide sleeve.

Preferably, the guide pillar includes a fixing column, a blocking seat and a positioning column, the positioning column is disposed on an upper end surface of the blocking seat, the fixing column is disposed on a lower end surface of the blocking seat, the blocking seat and the positioning column are completely placed in the inner hole of the guide sleeve, the fixing column is partially disposed in the inner hole of the guide sleeve, the spring is sleeved on the positioning column, and the length of the positioning column is slightly smaller than the length of the spring after compression.

Preferably, the upper end surface of the magnetic yoke is fixedly connected with the magnetic yoke connecting plate through a locking piece.

Preferably, the locking piece adopts a locking screw.

Preferably, four locking screws are adopted as the locking screws.

Preferably, the magnetic circuit further comprises a flaw detector signal line arranged on the magnet yoke, and the flaw detector signal line is connected with a flaw detector main machine.

Preferably, the handle is arranged on the mounting plate and welded on the upper end face of the mounting plate.

The utility model has the beneficial effects that:

the magnetic pole adjusting device is mounted at the position of a magnetic pole on a magnetic yoke of a crossed magnetic yoke iron core, the upper end face of the magnetic yoke is provided with a magnetic yoke connecting plate, a mounting plate is arranged on the magnetic yoke connecting plate, an elastic supporting piece used for ensuring that each magnetic yoke iron core is always attached to a detected curved surface is arranged between the mounting plate and the magnetic yoke connecting plate, the magnetic pole adjusting device is mounted at the position of the magnetic pole of the crossed magnetic yoke iron core and can be conveniently dismounted, and the magnetic pole adjusting device is provided with the corresponding magnetic pole adjusting device for curved surface magnetic powder detection in different curvature ranges so as to meet the requirements of magnetic pole clearance and magnetic yoke walking.

Secondly, the magnetic pole adjusting device comprises soft magnetic matching blocks arranged at the magnetic pole positions on the magnetic yokes of the crossed magnetic yoke iron core, a first bearing and a second bearing are arranged at two ends of each soft magnetic matching block, the first bearing, the soft magnetic matching blocks and the second bearings are connected together in series through bearing shafts, and nuts are arranged on the bearing shafts.

Thirdly, the soft magnetic matching block is fixed on the lower end face of the magnetic pole of the magnetic yoke through the mounting screw, the soft magnetic matching block is convenient to detach and mount through the mounting screw, later replacement and maintenance are facilitated, overall scrap is reduced, and cost input is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the structure of fig. 1.

In the figure: 1, a magnetic yoke; 2, a magnetic pole adjusting device; 3, connecting a magnetic yoke plate; 4, mounting a plate; 5, an elastic support member; 6, a locking piece; 7, flaw detector signal line; 8, a handle; 21, soft magnetic matching blocks; 22, a first bearing; 23, a second bearing; 24, a bearing shaft; 25, a nut; 26, mounting screws; 51, a guide sleeve; 52, a guide post; 53, a spring; 54, a limiting member; 55, fastening screws; 521, fixing columns; 522, a stop seat; 523, positioning column.

Detailed Description

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present invention are conventionally placed when used, and are merely used for convenience of describing and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the utility model and not to limit the scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1 and 2, a cross magnetic field magnetic particle flaw detector with a self-adaptive curved surface comprises a magnetic yoke 1 for realizing magnetization of a cross magnetic yoke iron core, a detachable magnetic pole adjusting device 2 is installed at the position of a magnetic pole on the magnetic yoke 1 of the cross magnetic yoke iron core, a magnetic yoke connecting plate 3 is arranged on the upper end face of the magnetic yoke 1, an installation plate 4 is arranged on the magnetic yoke connecting plate 3, and an elastic support piece 5 used for ensuring that each magnetic yoke iron core is always attached to a detected curved surface is arranged between the installation plate 4 and the magnetic yoke connecting plate 3. Wherein magnetic pole adjusting device 2 is installed to magnetic pole position department on yoke 1 of crossing yoke iron core, and magnetic pole adjusting device 2 can detect the curved surface magnetic powder of different camber scopes to realize magnetic pole clearance requirement and yoke walking requirement, and elastic support piece 5 can guarantee that every yoke iron core hugs closely all the time on the curved surface that is detected.

Further, as shown in fig. 1 and fig. 2, the magnetic pole adjusting device 2 includes a soft magnetic matching block 21 disposed at the magnetic pole position on the magnetic yoke 1 of the crossed magnetic yoke core, both ends of the soft magnetic matching block 21 are provided with a first bearing 22 and a second bearing 23, the first bearing 22, the soft magnetic matching block 21 and the second bearing 23 are connected in series through a bearing shaft 24, meanwhile, a nut 25 is disposed on the bearing shaft 24, and the arrangement of the two ends of the soft magnetic matching block 21 is more convenient to install, and is also more beneficial to realizing the magnetic pole gap requirement and the magnetic yoke traveling requirement, further, the soft magnetic matching block 21 is fixed on the lower end face of the magnetic pole of the magnetic yoke 1 through a mounting screw 26, and the mounting screw 26 is convenient to disassemble and assemble, so that the curved magnetic powder detection with different curvature ranges has corresponding magnetic pole adjusting device 2 to realize the magnetic pole gap requirement and the magnetic yoke traveling requirement. More specifically, the soft magnetic matching block 21 is a ferrite soft magnetic matching block, and the ferrite soft magnetic matching block is more matched with the magnetic yoke 1, so that the curved surface detection is more facilitated. In this embodiment, the crossed yoke cores are specifically at least two yoke cores, the two yoke cores are distributed in a crossed manner, each yoke core has two magnetic poles, that is, there are four magnetic poles at two ends of the two yoke cores, so that there are four magnetic pole adjusting devices 2, and each magnetic pole adjusting device 2 corresponds to each magnetic pole.

Further, as shown in fig. 1 and 2, the number of the elastic supporting members 5 is equal to the number of the magnetic pole adjusting devices 2, which is more advantageous to ensure that each yoke core is always tightly attached to the curved surface to be detected. Furthermore, the elastic supporting member 5 includes a guide sleeve 51 disposed on the lower end surface of the mounting plate 4 and a guide post 52 disposed on the upper end surface of the yoke connecting plate 3, the guide post 52 is mounted in the guide sleeve 51, a spring 53 is disposed on the guide post 52, and a limiting member 54 is disposed on the guide sleeve 51. It is to be noted that the guide post 52 includes a fixed post 521, a blocking seat 522 and a positioning post 523, the upper end surface of the blocking seat 522 is provided with the positioning post 523, the lower end surface of the blocking seat 522 is provided with the fixed post 521, wherein the blocking seat 522 and the positioning post 523 are completely placed in the inner hole of the guide sleeve 51, part of the fixed post 521 is in the inner hole of the guide sleeve 51, the positioning post 523 is sleeved with a spring 53, the length of the positioning post 523 is slightly smaller than the compressed length of the spring 53, the blocking seat 522 blocks the spring 53, and then the limiting is limited by the limiting part 54 on the guide sleeve 51, which only can be used as the limiting part 54, the guide sleeve 51 is provided with at least one limiting screw, preferably two or four limiting screws in this embodiment. It is emphasized that the mounting plate 4 and the guide sleeve 51 are fixedly locked by the fastening screw 55, which facilitates the mounting and dismounting. The yoke connecting plate 3 is connected with the guide post 52 through threads, and is convenient to mount and dismount.

Further, as shown in fig. 1 and fig. 2, the upper end surface of the yoke 1 is fixedly connected with the yoke connecting plate 3 through a locking member 6, wherein the locking member 6 is a locking screw, and in this embodiment, four locking screws are used, so that the yoke 1 can be more stably and fixedly connected with the yoke connecting plate 3.

As shown in fig. 1 and 2, the magnetic yoke device further comprises a flaw detector signal line 7 arranged on the magnetic yoke 1, wherein the flaw detector signal line 7 can pass through the magnetic yoke connecting plate 3 or can not pass through the magnetic yoke connecting plate 3, and can be selected according to actual conditions when in use, the flaw detector signal line 7 is connected with a flaw detector main unit, and in the embodiment, the flaw detector signal line 7 passes through a hole in the middle of the magnetic yoke connecting plate 3 and is connected with the flaw detector main unit. For the host of the flaw detector, those skilled in the art know that the host is an external control device, such as the chinese utility model patent with the publication number CN204594932U, wherein a similar host is also disclosed, and therefore, the details are not repeated herein.

As shown in fig. 1 and 2, the handle 8 is arranged on the mounting plate 4, the handle 8 is welded on the upper end surface of the mounting plate 4, the handle 8 is more favorable for being conveniently held for use, the welding connection is favorable for improving the use stability, and the magnet yoke 1 has certain weight, so that the magnet yoke is fixed into a whole through welding technology, the phenomenon of avoiding falling off in use is greatly improved, and the safety in the use process is improved.

As shown in figures 1 and 2, when the self-adaptive curved surface magnetic particle detector is used, a flaw detector signal wire 7 is connected with a flaw detector main machine, and the handle 8 is held by hands to realize the self-adaptive curved surface magnetic particle detection.

Standard parts used in the application document can be purchased from the market, the specific connection mode of each part adopts conventional means such as mature screws and welding in the prior art, the internal parts of the flaw detector host adopt conventional models in the prior art, the internal structure of the flaw detector host belongs to the prior art structure, a worker can complete normal operation of the flaw detector host according to a prior art manual, and the circuit connection adopts the conventional connection mode in the prior art, so that specific description is not given.

It should be noted that, although the above embodiments have been described herein, the utility model is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.

Claims (10)

1. The utility model provides a cross magnetic field magnetic particle flaw detector of self-adaptation curved surface, is including yoke (1) that is used for realizing magnetization and crosses the yoke iron core, its characterized in that: the crossed magnetic yoke iron cores are provided with detachable magnetic pole adjusting devices (2) at the positions of magnetic poles on magnetic yokes (1), magnetic yoke connecting plates (3) are arranged on the upper end faces of the magnetic yokes (1), mounting plates (4) are arranged on the magnetic yoke connecting plates (3), and elastic supporting pieces (5) used for ensuring that each magnetic yoke iron core is always attached to a detected curved surface are arranged between the mounting plates (4) and the magnetic yoke connecting plates (3).

2. The cross magnetic field magnetic particle flaw detector of self-adaptive curved surface of claim 1, characterized in that: magnetic pole adjusting device (2) are including setting up at the crossed yoke iron core yoke (1) is gone up soft magnetic matching block (21) on the magnetic pole position department, the both ends of soft magnetic matching block (21) all are provided with first bearing (22) and second bearing (23), first bearing (22), soft magnetic matching block (21) with second bearing (23) are in the same place through bearing axle (24) cluster connection, simultaneously be provided with nut (25) on bearing axle (24).

3. The cross magnetic field magnetic particle flaw detector of the self-adaptive curved surface of claim 2, characterized in that: the soft magnetic matching block (21) is fixed on the lower end face of the magnetic pole of the magnetic yoke (1) through a mounting screw (26).

4. The cross magnetic field magnetic particle flaw detector of the self-adaptive curved surface of claim 2, characterized in that: the soft magnetic matching block (21) adopts a ferrite soft magnetic matching block.

5. The cross magnetic field magnetic particle flaw detector of self-adaptive curved surface of claim 1, characterized in that: the number of the elastic supporting pieces (5) is consistent with that of the magnetic pole adjusting devices (2).

6. The cross magnetic field magnetic particle flaw detector of self-adaptive curved surface of claim 5, characterized in that: the elastic supporting piece (5) comprises a guide sleeve (51) arranged on the lower end face of the mounting plate (4) and a guide post (52) arranged on the upper end face of the magnetic yoke connecting plate (3), the guide post (52) is mounted in the guide sleeve (51), a spring (53) is arranged on the guide post (52), and a limiting piece (54) is arranged on the guide sleeve (51).

7. The cross magnetic field magnetic particle flaw detector of the self-adaptive curved surface of claim 6, wherein: the guide post (52) comprises a fixing post (521), a blocking seat (522) and a positioning post (523), the positioning post (523) is arranged on the upper end face of the blocking seat (522), the fixing post (521) is arranged on the lower end face of the blocking seat (522), the blocking seat (522) and the positioning post (523) are completely placed in an inner hole of the guide sleeve (51), the fixing post (521) is partially arranged in the inner hole of the guide sleeve (51), the spring (53) is sleeved on the positioning post (523), and the length of the positioning post (523) is slightly smaller than the length of the spring (53) after compression.

8. The cross magnetic field magnetic particle flaw detector of self-adaptive curved surface of claim 1, characterized in that: the upper end face of the magnetic yoke (1) is fixedly connected with the magnetic yoke connecting plate (3) through a locking piece (6).

9. The adaptive curved-surface cross-magnetic-field magnetic particle flaw detector of claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein: still including setting up defectoscope signal line (7) on yoke (1), defectoscope signal line (7) are connected with the appearance host computer of detecting a flaw.

10. The cross magnetic field magnetic particle flaw detector of adaptive curved surface of claim 9, characterized by: the handle is characterized by further comprising a handle (8) arranged on the mounting plate (4), wherein the handle (8) is welded on the upper end face of the mounting plate (4).

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