CN210109028U - Cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector - Google Patents
Cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector Download PDFInfo
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- CN210109028U CN210109028U CN201920641602.3U CN201920641602U CN210109028U CN 210109028 U CN210109028 U CN 210109028U CN 201920641602 U CN201920641602 U CN 201920641602U CN 210109028 U CN210109028 U CN 210109028U
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Abstract
The utility model provides a cross magnetic field magnetic particle flaw detector probe and a magnetic particle flaw detector, wherein the magnetic particle flaw detector probe comprises a shell and an iron core arranged in the shell; an opening is formed in the bottom of the shell, the iron core comprises two probe pins which are parallel to each other, and the probe pins extend out of the opening to detect a detection surface; a connecting column penetrates through the top of the shell, the connecting column is connected with the shell in a sliding mode, the bottom of the connecting column is connected with the iron core, the connecting column is arranged corresponding to the probe pin, and a limiting raised head is arranged at the top of the connecting column; a pre-tightening spring is sleeved on the connecting column, one end of the pre-tightening spring is propped against the top of the shell, and the other end of the pre-tightening spring is propped against the iron core; the number of the iron cores is two, and the two iron cores are arranged in a crossed mode. The utility model discloses a magnetic particle flaw detector probe surveys time measuring, no matter whether the detection surface is level and smooth, the probe foot of two iron cores can all paste tight detection surface.
Description
Technical Field
The utility model relates to a special type pressure-bearing equipment surface nondestructive test technical field especially relates to a cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector.
Background
The special pressure-bearing equipment is used for storing medium containers such as petroleum or liquefied gas and the like, such as petroleum storage tanks, spherical tanks and the like, is generally made of steel, is used for a long time, and has internal walls which are easy to generate defects (such as cracks, slag inclusion, hairlines and the like) to cause potential safety hazards.
If magnetic powder is scattered on the surface of the inner wall of the special pressure-bearing equipment, the magnetic powder is attracted and accumulated at the defect position by the leakage magnetic field, the accumulated magnetic powder can show the position and the shape of the defect under proper illumination conditions, and the magnetic powder inspection is realized by observing the accumulated magnetic powder.
Magnetic powder inspection is one of five conventional methods for nondestructive testing, and is also a common means for testing defects on the surface or near surface of a ferromagnetic material. The method has high detection sensitivity and simple and reliable process, so the method is widely adopted.
The magnetic powder inspection equipment of the special pressure-bearing equipment is a magnetic powder inspection instrument, a probe of the magnetic powder inspection instrument can generate a magnetic field, the probe is attached to the detected surface, and the magnetic field is applied to perform magnetic powder inspection.
In the magnetic particle flaw detector, the magnetic particle flaw detector is called a cross magnetic field magnetic particle flaw detector, wherein a cross magnetic field is formed by two crossed iron cores. The cross magnetic field magnetic particle flaw detector detects flaws by applying alternating current magnetic fields with equal frequency and intensity to two crossed iron cores, and the iron cores are wound with coils. 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 the detected surface through the probe pins.
In the existing cross magnetic field magnetic particle flaw detector, two iron cores are rigidly connected, four probe pins are in the same plane, and by adopting the probe structure, when the detected surface is a flat surface, the four probe pins can simultaneously contact the detected surface, but in actual detection, the detected surface sometimes has unevenness or a tank body, a pipeline and the like have curvatures, and the four probe pins of the existing cross magnetic field magnetic particle flaw detector are in the same plane. That is to say, when the detected surface is uneven, the four probe pins of the existing cross magnetic field magnetic particle flaw detector cannot simultaneously contact the detected surface, so that false detection and missed detection are caused.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art, the utility model aims to provide a cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector aims at solving among the prior art when being surveyed the surperficial unevenness, and four probe feet of cross magnetic field magnetic particle flaw detector can not contact simultaneously and are surveyed the surface, cause the problem of false retrieval and hourglass inspection.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a probe of a crossed magnetic field magnetic particle flaw detector comprises a shell and an iron core arranged in the shell; an opening is formed in the bottom of the shell, the iron core comprises two probe pins which are parallel to each other, and the probe pins extend out of the opening to detect a detection surface; a connecting column penetrates through the top of the shell, the connecting column is connected with the shell in a sliding mode, the bottom of the connecting column is connected with the iron core, the connecting column is arranged corresponding to the probe pin, and a limiting raised head is arranged at the top of the connecting column; a pre-tightening spring is sleeved on the connecting column, one end of the pre-tightening spring is propped against the top of the shell, and the other end of the pre-tightening spring is propped against the iron core; the number of the iron cores is two, and the two iron cores are arranged in a crossed mode.
As a further improved technical scheme, the intersection of the two iron cores is vertical.
As a further improved technical scheme, the iron core is U-shaped, two opposite U-shaped edges are the probe pins, and the U-shaped bottom is perpendicular to the two U-shaped edges.
As a further improved technical scheme, a through hole is formed in the top of the shell, and the connecting column penetrates through the through hole.
As a further improved technical scheme, the two iron cores are one high iron core and one low iron core, and the lower end face of the top of the high iron core is higher than the upper end face of the top of the low iron core by a preset distance.
As a further improvement, the housing is cylindrical.
As a further improved technical scheme, a mounting hole is formed in the top of the iron core, an internal thread is formed in the mounting hole, an external thread matched with the internal thread is arranged at the bottom of the connecting column, and the external thread is screwed into the internal thread so that the connecting column is connected with the iron core.
The utility model also provides a magnetic particle flaw detector, wherein, include as above cross magnetic field magnetic particle flaw detector probe.
The utility model discloses an iron core of two magnetic particle flaw detector probes passes 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 reciprocate, adaptable surface by the survey, even by the surperficial unevenness of surveying, every probe also can be laminated by the survey on the surface, in addition, be provided with the pretension spring between shell and the iron core, can compress tightly the probe by survey on the surface.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of a probe of the cross magnetic field magnetic particle flaw detector of the present invention;
FIG. 2 is a schematic view of the internal structure of the probe of the cross magnetic field magnetic particle flaw detector of the present invention;
fig. 3 is a top view of the intersection of two iron cores of the present invention;
fig. 4 is a schematic view of the connection structure of the iron core and the connection column of the present invention.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 is the utility model discloses cross magnetic field magnetic particle flaw detector probe's schematic structure, fig. 2 is the utility model discloses cross magnetic field magnetic particle flaw detector probe's internal structure schematic diagram, as shown in fig. 1 and fig. 2, cross magnetic field magnetic particle flaw detector probe includes shell 10, iron core 20 and spliced pole 30, iron core 20 sets up inside shell 10, iron core 20 is including two probe foot (21, 22) that are parallel to each other, shell 10 bottom is provided with the opening, iron core 20's probe foot stretches out from the opening of shell bottom, just so can make probe foot and survey surface contact, carry out magnetic particle inspection.
The connecting column 30 penetrates through the top of the shell 10 and is connected with the shell 10 in a sliding mode, and the bottom of the connecting column 30 is connected with the iron core 20, so that the iron core 20 is connected to the top of the shell 10 in a sliding mode, the iron core 20 can move up and down in the shell 10, the height of probe pins (21 and 22) on the iron core 20 is adjusted, and the probe pins are adapted to different detection surfaces.
The connecting columns 30 are arranged corresponding to the probe pins, namely each probe pin corresponds to one connecting column 30, so that each probe pin can move up and down to adapt to the height of the detection surface.
The top of the connecting column 30 is provided with a limiting raised head 31, and the limiting raised head 31 is positioned at the outer side of the top of the shell 10, so that the sliding of the connecting column 30 can be limited, and the connecting column 30 is prevented from slipping off from the shell.
The connecting column 30 is sleeved with a pre-tightening spring 40, one end of the pre-tightening spring 40 abuts against the top of the shell 10, and the other end of the pre-tightening spring abuts against the iron core 20, so that the iron core 20 can be tightly abutted against the probe pin of the iron core 20 on the detection surface. The length of the natural extension of the pre-tightening spring 40 is greater than that of the connecting column 30, that is, the pre-tightening spring 40 is in a compressed state when being sleeved on the connecting column 30, so that a certain pre-tightening force is generated to tightly push the probe pin of the iron core 20 against the detection surface.
As shown in fig. 2, the core 20 has two bars, and the two bars 20 are arranged to cross each other, so that a cross magnetic field is provided. In a preferred embodiment, two iron cores 20 are crossed vertically, fig. 3 is a top view of two iron cores of the present invention, as shown in fig. 3, an included angle between two iron cores 20 is 90 degrees when viewed from above, so that the two iron cores 20 are crossed vertically, and when a probe of a cross magnetic field magnetic particle flaw detector contacts a detection surface, a vertically crossed magnetic field can be formed.
As shown in fig. 2, the core 20 has an inverted U-shape, and the bottom of the U-shape corresponds to the top of the core 20. The two opposite U-shaped edges are probe pins (21, 22) of the iron core 20, and the U-shaped bottom is perpendicular to the two U-shaped edges, so that the whole iron core 20 is in a rectangular frame shape comprising three edges, and thus, the whole iron core 20 is regular in shape and convenient to produce and install.
Two iron cores 20 are tall and short, and higher iron core 20 has a long probe, and the lower terminal surface at the top of higher iron core 20 is higher than the upper terminal surface at the top of lower iron core 20 by a predetermined distance d, so that two iron cores 20 have a certain distance from each other, and the up-and-down movement of each other is not influenced. The shorter core 20 passes between the two pins of the taller core 20. The two iron cores 20 are independent of each other and can independently move up and down in the shell without mutual influence, so that the probe pins on the iron cores 20 can self-adaptively adjust the height of the probe pins according to the detection surface, and the probe pins on the two iron cores 20 can contact with the detection surface.
In order to realize the sliding connection between the connecting column 30 and the housing 10, a through hole 11 may be formed in the top of the housing 10, the through hole 11 penetrates through the top of the housing 10, the connecting column 30 is inserted into the through hole 11, and the limiting protrusion 31 is located outside the housing 10 to limit the maximum downward movement stroke of the connecting column 30, so as to limit the connecting column 30 and prevent the connecting column 30 from being separated from the housing 10.
In one embodiment, the housing 10 is cylindrical, and as shown in fig. 1, the cylindrical shape of the housing 10 can minimize the size of the housing 10, save the material for manufacturing the housing 10, and save the space occupied by the housing 10 while ensuring that two cores 20 can be accommodated.
Fig. 4 is the utility model discloses connection structure schematic diagram that iron core and spliced pole are connected, as shown in fig. 4, iron core 20 top is provided with mounting hole 23, is provided with internal thread 231 in the mounting hole 23, and spliced pole 30's bottom is provided with the external screw thread 32 with internal screw thread 231 adaptation, and during external screw thread 32 screw in internal thread 231, just can be connected spliced pole 30 and iron core 20.
The utility model also provides a magnetic particle flaw detector, wherein, include as above cross magnetic field magnetic particle flaw detector probe.
To sum up, the utility model discloses an 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 reciprocate, adaptable surface by the exploration, even by the surperficial unevenness of exploration, every probe also can be laminated by the exploration on the surface, in addition, be provided with the pretension spring between shell and the iron core, can compress tightly the probe by the exploration on the surface.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. A probe of a crossed magnetic field magnetic particle flaw detector is characterized by comprising a shell and an iron core arranged in the shell; an opening is formed in the bottom of the shell, the iron core comprises two probe pins which are parallel to each other, and the probe pins extend out of the opening to detect a detection surface; a connecting column penetrates through the top of the shell, the connecting column is connected with the shell in a sliding mode, the bottom of the connecting column is connected with the iron core, the connecting column is arranged corresponding to the probe pin, and a limiting raised head is arranged at the top of the connecting column; a pre-tightening spring is sleeved on the connecting column, one end of the pre-tightening spring is propped against the top of the shell, and the other end of the pre-tightening spring is propped against the iron core; the number of the iron cores is two, and the two iron cores are arranged in a crossed mode.
2. The probe of claim 1, wherein the intersection of the two cores is a perpendicular intersection.
3. The probe of claim 1, wherein the core is in the shape of an inverted U, two opposing U-shaped sides are the probe legs, and the U-shaped bottom is perpendicular to the two U-shaped sides.
4. The probe of claim 1, wherein a through hole is formed in the top of the shell, and the connecting column is arranged in the through hole in a penetrating mode.
5. The probe of claim 1, wherein the two cores are one tall and one short, and the lower end surface of the top of the tall core is higher than the upper end surface of the top of the short core by a predetermined distance.
6. The cross-magnetic field magnetic particle flaw detector probe of claim 1, wherein the housing is cylindrical.
7. The probe of claim 1, wherein a mounting hole is formed in the top of the iron core, an internal thread is formed in the mounting hole, an external thread matched with the internal thread is formed in the bottom of the connecting column, and the external thread is screwed into the internal thread so that the connecting column is connected with the iron core.
8. A magnetic particle flaw detector comprising the cross-field magnetic particle flaw detector probe of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920641602.3U CN210109028U (en) | 2019-05-07 | 2019-05-07 | Cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920641602.3U CN210109028U (en) | 2019-05-07 | 2019-05-07 | Cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210109028U true CN210109028U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920641602.3U Active CN210109028U (en) | 2019-05-07 | 2019-05-07 | Cross magnetic field magnetic particle flaw detector probe and magnetic particle flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210109028U (en) |
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2019
- 2019-05-07 CN CN201920641602.3U patent/CN210109028U/en active Active
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Effective date of registration: 20200728 Address after: 518081 H, ninth, Shenzhen, Yantian Road, Yantian District, Guangdong Co-patentee after: GUANGDONG INSTITUTE OF SPECIAL EQUIPMENT INSPECTION Patentee after: SHENZHEN ZHONG CHANG INSPECTION EQUIPMENT Co.,Ltd. Address before: 518081 H, ninth, Shenzhen, Yantian Road, Yantian District, Guangdong Patentee before: SHENZHEN ZHONG CHANG INSPECTION EQUIPMENT Co.,Ltd. |