CN215953458U - Magnetic leakage flaw detection magnetic pole suitable for steel pipes with various sizes and pipe diameters - Google Patents
Magnetic leakage flaw detection magnetic pole suitable for steel pipes with various sizes and pipe diameters Download PDFInfo
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- CN215953458U CN215953458U CN202122290959.1U CN202122290959U CN215953458U CN 215953458 U CN215953458 U CN 215953458U CN 202122290959 U CN202122290959 U CN 202122290959U CN 215953458 U CN215953458 U CN 215953458U
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Abstract
The utility model discloses a magnetic leakage inspection magnetic pole suitable for steel pipes with various pipe diameters, wherein one end face of a basic magnetic pole unit A is an installation plane, the opposite end face of the basic magnetic pole unit A is an arc surface sunken towards the basic magnetic pole unit A, a plurality of magnetic pole units B are sequentially and detachably fixed on the arc surface of the basic magnetic pole unit A along the radial direction of the arc surface, the outer end faces of the magnetic pole units B facing the basic magnetic pole unit A are circular convex arc surfaces which are coaxially arranged with the arc surface of the basic magnetic pole unit A, and the inner end faces of the magnetic pole units B facing away from the basic magnetic pole unit A are circular concave arc surfaces which are coaxially with the arc surface of the basic magnetic pole unit A. According to the structure, the magnetic leakage flaw detection magnetic pole is suitable for steel pipes with various pipe diameters, the magnetic leakage flaw detection of the steel pipes with different pipe diameters can be realized through the same magnetic leakage flaw detection equipment, the axis of the magnetic pole cannot be changed due to the increase or decrease of the magnetic pole units B, and the magnetic pole and the axis of the steel pipe can be coaxially calibrated conveniently.
Description
Technical Field
The utility model relates to the technical field of magnetic leakage flaw detection equipment of steel pipes, in particular to a magnetic pole suitable for magnetic leakage flaw detection of steel pipes with various sizes and pipe diameters.
Background art:
the principle of magnetic leakage flaw detection is that when a ferromagnetic steel pipe is fully magnetized, magnetic lines of force in the pipe wall are blocked by defects on the surface or near the surface of the ferromagnetic steel pipe, the magnetic lines of force at the defects are distorted, and a part of the magnetic lines of force are leaked out of the inner surface and the outer surface of the steel pipe to form a magnetic leakage field. And an electromagnetic detection method for detecting the leakage magnetic field by using a detection element to find the defects, namely leakage magnetic flaw detection. When the leakage magnetic field is picked up by the detecting element which is positioned on the surface of the steel pipe and moves relative to the steel pipe, and is converted into a defect electric signal, a signal reflecting the defect can be obtained through the probe, and therefore the defect is judged and processed. The flaw detection sensitivity was highest at the outer surface of the steel pipe, and decreased as the wall thickness increased from the outer surface to the inner surface.
The magnetic poles used by the existing magnetic flux leakage flaw detection equipment are generally provided with a plurality of groups of magnetic poles with corresponding pipe diameters according to different pipe diameters of produced steel pipes. When steel pipes with different diameters are subjected to magnetic leakage flaw detection, the magnetic poles need to be replaced, and the axes of the magnetic poles need to be calibrated after the magnetic poles are replaced, so that the axes of the steel pipes passing through the magnetic leakage flaw detection equipment and the axes of the magnetic poles are coaxial, the distance between the magnetic poles and the axes of the steel pipes passing through the magnetic leakage flaw detection equipment needs to be adjusted correspondingly by adjusting the magnetic pole mounting seats, the adjustment is relatively complex, the efficiency is low, the pipe diameters of the steel pipes, which can be subjected to flaw detection by the magnetic poles, can be limited by the adjusting distance of the magnetic pole mounting seats, and the range of the flaw detection pipe diameters of the magnetic leakage flaw detection equipment is small.
The utility model has the following contents:
the utility model aims to: the defects of the prior art are overcome, the magnetic leakage flaw detection magnetic pole suitable for steel pipes with various pipe diameters is provided, the magnetic leakage flaw detection of the steel pipes with different pipe diameters can be realized through the same magnetic leakage flaw detection equipment, the axis of the magnetic pole cannot be changed due to the increase or decrease of the magnetic pole units B, and the magnetic pole and the axis of the steel pipe can be coaxially calibrated conveniently; through the arrangement of the counter bores, the connecting bolts cannot expose the magnetic poles, and friction and even collision between the steel pipes and the connecting bolts are avoided; through the action of the connecting sleeve, the steel pipe is ensured not to vibrate among different magnetic pole units when passing through the magnetic poles; the side walls of the magnetic pole units are flush, so that the generated magnetic induction lines are more regular, and magnetic flux leakage flaw detection can be performed on the steel pipe more accurately; the round corners arranged on the magnetic pole units prevent the magnetic poles from scratching the surfaces of the steel pipes when the steel pipes pass through the magnetic poles; through the arc-shaped strip arranged on the magnetic pole unit B, the magnetic pole side wall formed by mutually and fixedly connecting the magnetic pole units is flush, and the accuracy of magnetic flux leakage flaw detection of the steel pipe is ensured.
The technical scheme adopted by the utility model is as follows:
the magnetic leakage inspection magnetic pole for the steel pipes with various sizes and diameters comprises a basic magnetic pole unit A, wherein one side end face of the basic magnetic pole unit A is a mounting plane, the opposite side end face of the basic magnetic pole unit A relative to the mounting plane is an arc surface sunken towards the basic magnetic pole unit A, the chord of the arc surface is parallel to the mounting plane, the arc surface of the basic magnetic pole unit A is sequentially and detachably fixedly connected with a plurality of magnetic pole units B along the radial direction of the arc surface, the outer end face of the magnetic pole unit B towards the basic magnetic pole unit A is a circular convex arc surface coaxially arranged with the arc surface of the basic magnetic pole unit A, the inner end face of the magnetic pole unit B back to the basic magnetic pole unit A is a circular concave arc surface coaxially with the arc surface of the basic magnetic pole unit A, and the circular convex arc surface of the magnetic pole unit B adjacent to the basic magnetic pole unit A is matched with the circular arc surface of the basic magnetic pole unit A, the convex arc surfaces of the other magnetic pole units B are matched with the concave arc surfaces of the adjacent magnetic pole units B.
The utility model further improves the scheme that a plurality of through holes vertical to the installation plane are sequentially arranged at equal intervals along the extending direction of the axis at the installation plane of the basic magnetic pole unit A, corresponding to the axis of the arc surface, the through holes of the magnetic pole unit B corresponding to the installation basic magnetic pole unit A are also provided with matched through holes, connecting bolts sequentially penetrate through the magnetic pole unit B and the basic magnetic pole unit A and then extend out of the installation plane, and the magnetic pole unit B and the basic magnetic pole unit A are fixedly connected with the steel pipe magnetic leakage flaw detection equipment.
In a further improved scheme of the utility model, counter bores matched with nuts of connecting bolts are respectively arranged at the positions of the circular arc surface of the basic magnetic pole unit A corresponding to the through holes and the positions of the circular concave arc surface of the magnetic pole unit B corresponding to the through holes.
According to a further improvement scheme of the utility model, when the connecting bolt fixedly connects the at least one magnetic pole unit B and the basic magnetic pole unit A to the steel pipe magnetic leakage flaw detection equipment, connecting sleeves are arranged in counter bores which are not in contact with a nut of the connecting bolt, the connecting bolt penetrates through the connecting sleeves, and the connecting sleeves are made of elastic materials.
According to a further improvement of the utility model, the outer diameter of the connecting sleeve is matched with the inner diameter of the counter bore, the axial length of the connecting sleeve is matched with the axial length of the counter bore, and the inner diameter of the connecting sleeve is matched with the outer diameter of the connecting bolt.
In a further improvement of the present invention, the width of the basic magnetic pole unit a is equal to the width and the length of the magnetic pole unit B, and the four side end faces of the basic magnetic pole unit a and the magnetic pole unit B are vertical side faces perpendicular to the installation plane of the basic magnetic pole unit a.
In a further improvement scheme of the utility model, transition fillets are arranged at the joints of the end surfaces of the basic magnetic pole unit A corresponding to the edges at the two sides of the arc surface and at the joints of the end surfaces of the magnetic pole unit B corresponding to the edges at the two sides of the circular concave arc surface and the circular concave arc surface.
In a further improved scheme of the utility model, arc-shaped convex strips matched with transition fillets of adjacent magnetic pole units B in contact are arranged at the connecting positions of the end surfaces of the magnetic pole units B corresponding to the edges of the two sides of the round convex cambered surface and the round convex cambered surface.
According to a further improvement scheme of the utility model, the outer side wall of the arc-shaped convex strip is flush with the end surfaces of the two side edges of the circular concave arc surface corresponding to the magnetic pole unit B.
According to a further improvement scheme of the utility model, a chamfer is arranged at the joint of the mounting plane of the basic magnetic pole unit A and the end surfaces corresponding to the two side edges of the arc surface.
The utility model has the beneficial effects that:
firstly, the magnetic leakage flaw detection magnetic pole is suitable for steel pipes with various pipe diameters, the magnetic leakage flaw detection of the steel pipes with different pipe diameters can be realized through the same magnetic leakage flaw detection equipment, the axis of the magnetic pole cannot be changed due to the increase or decrease of the magnetic pole units B, and the magnetic pole and the axis of the steel pipe can be coaxially calibrated conveniently.
Secondly, the magnetic flux leakage inspection magnetic pole suitable for steel pipes with various sizes and pipe diameters ensures that the connecting bolt does not expose out of the magnetic pole through the arrangement of the counter bore, and avoids the steel pipe and the connecting bolt from generating friction and even collision.
Thirdly, the magnetic flux leakage inspection magnetic pole suitable for steel pipes with various pipe diameters is ensured not to generate vibration between different magnetic pole units when the steel pipes pass through the magnetic pole through the action of the connecting sleeve.
And fourthly, the magnetic flux leakage flaw detection magnetic poles are suitable for steel pipes with various sizes and pipe diameters, and the side walls of the magnetic pole units are flush, so that the generated magnetic induction lines are more regular, and the magnetic flux leakage flaw detection of the steel pipes is more accurately performed.
Fifth, the magnetic flux leakage inspection magnetic pole suitable for steel pipes with various pipe diameters is characterized in that the magnetic pole unit is provided with a fillet, so that the magnetic pole can prevent the surface of the steel pipe from being scratched when the steel pipe passes through the magnetic pole.
Sixth, the magnetic pole for magnetic leakage inspection of steel pipes with various pipe diameters is characterized in that the magnetic pole side walls formed by fixedly connecting the magnetic pole units are flush through the arc-shaped strips arranged on the magnetic pole units B, and the accuracy of magnetic leakage inspection of the steel pipes is guaranteed.
Description of the drawings:
FIG. 1 is a schematic front cross-sectional view of the present invention.
The specific implementation mode is as follows:
with reference to fig. 1, it can be known that the magnetic flux leakage inspection magnetic pole suitable for steel pipes with various sizes and pipe diameters includes a basic magnetic pole unit a1, a side end face of the basic magnetic pole unit a1 is a mounting plane, the basic magnetic pole unit a1 is an arc surface depressed towards the basic magnetic pole unit a1 relative to the opposite side end face of the mounting plane, a chord of the arc surface is parallel to the mounting plane, the arc surface of the basic magnetic pole unit a1 is sequentially and detachably fixedly connected with a plurality of magnetic pole units B2 along the radial direction of the arc surface, the outer end face of the magnetic pole unit B2 facing the basic magnetic pole unit a1 is a circular convex arc surface arranged coaxially with the arc surface of the basic magnetic pole unit a1, the inner end face of the magnetic pole unit B2 facing away from the basic magnetic pole unit a1 is a circular concave arc surface coaxial with the arc surface of the basic magnetic pole unit a1, and the circular convex arc surface of the magnetic pole unit B2 adjacent to the basic magnetic pole unit a1 is matched with the circular arc surface of the basic magnetic pole unit a1, the round convex cambered surfaces of the other magnetic pole units B2 are matched with the round concave cambered surfaces of the adjacent magnetic pole unit B2; a plurality of through holes 3 perpendicular to the installation plane are sequentially arranged at equal intervals along the extending direction of the axis at the installation plane of the basic magnetic pole unit A1 and corresponding to the axis of the arc surface, matched through holes 3 are also arranged at the through hole 3 of the magnetic pole unit B2 corresponding to the installation basic magnetic pole unit A1, a connecting bolt 5 sequentially penetrates through the magnetic pole unit B2 and the basic magnetic pole unit A1 and then extends out of the installation plane, and the magnetic pole unit B2 and the basic magnetic pole unit A1 are fixedly connected with the magnetic flux leakage inspection equipment of the steel pipe; counterbores 4 matched with nuts 6 of connecting bolts 5 are respectively arranged at the positions of the arc surface of the basic magnetic pole unit A1 corresponding to the through holes 3 and the positions of the circular concave arc surface of the magnetic pole unit B2 corresponding to the through holes 3; when the connecting bolt 5 fixedly connects at least one magnetic pole unit B2 and the basic magnetic pole unit A1 to the steel pipe magnetic flux leakage inspection equipment, connecting sleeves 10 are arranged in the counter bores 4 which are not in contact with the screw caps 6 of the connecting bolt 5, the connecting bolt 5 penetrates through the connecting sleeves 10, and the connecting sleeves 10 are made of elastic materials; the outer diameter of the connecting sleeve 10 is matched with the inner diameter of the counter bore 4, the axial length of the connecting sleeve 10 is matched with the axial length of the counter bore 4, and the inner diameter of the connecting sleeve 10 is matched with the outer diameter of the connecting bolt 5; the width of the basic magnetic pole unit A1 and the width and the length of the magnetic pole unit B2 are equal, and the end faces of the four sides of the basic magnetic pole unit A1 and the magnetic pole unit B2 are vertical to the installation plane of the basic magnetic pole unit A1; transition fillets 7 are arranged at the joints of the end surfaces of the basic magnetic pole unit A1 corresponding to the edges at the two sides of the arc surface and at the joints of the end surfaces of the magnetic pole unit B2 corresponding to the edges at the two sides of the circular concave arc surface and the circular concave arc surface; the magnetic pole unit B2 is provided with an arc convex strip 8 matched with the transition fillet 7 of the adjacent magnetic pole unit B2 at the joint of the end face corresponding to the two side edges of the round convex arc surface and the round convex arc surface; the outer side wall of the arc-shaped convex strip 8 is flush with the end surfaces of the two side edges of the circular concave arc surface corresponding to the magnetic pole unit B2; and a chamfer 9 is arranged at the joint of the mounting plane of the basic magnetic pole unit A1 and the end surfaces corresponding to the edges at the two sides of the arc surface.
When the magnetic flux leakage flaw detection device is used, the circular concave cambered surfaces of the magnetic pole units B2 and the circular cambered surfaces of the basic magnetic pole units A1 are coaxial, so that the radius of the circular concave cambered surfaces of the magnetic pole units B2 which are farther away from the basic magnetic pole units A1 is smaller, and the magnetic flux leakage flaw detection device is suitable for magnetic flux leakage flaw detection of steel pipes with different pipe diameters according to the number of the magnetic pole units B2 fixed with the basic magnetic pole units A1. When the magnetic flux leakage detection device is used, the connecting bolt 5 is detached, the diameter of the circular concave cambered surface of the magnetic pole unit B2 which is far away from the basic magnetic pole unit A1 is determined to be removed or increased according to the size of the pipe diameter and the pipe diameter of a steel pipe to be subjected to magnetic flux leakage detection, and then the needed magnetic pole unit B2 and the basic magnetic pole unit A1 are connected and fixed through the connecting bolt.
Claims (10)
1. Steel pipe magnetic leakage magnetic pole of detecting a flaw suitable for multiple size pipe diameter, its characterized in that: including basic magnetic pole unit A (1), a side end face of basic magnetic pole unit A (1) is the mounting surface, basic magnetic pole unit A (1) is for the sunken arc surface of basic magnetic pole unit A (1) for mounting surface's relative side end face, the chord of arc surface is parallel with the mounting surface, the arc surface of basic magnetic pole unit A (1) along the radial detachably fixedly connected with a plurality of magnetic pole unit B (2) of cambered surface in proper order, magnetic pole unit B (2) is towards the outer terminal surface of basic magnetic pole unit A (1) the circular convex cambered surface that sets up with the arc surface coaxial axle center of basic magnetic pole unit A (1), the interior terminal surface that magnetic pole unit B (2) dorsad basis magnetic pole unit A (1) is the circular concave cambered surface with the arc surface coaxial axle center of basic magnetic pole unit A (1) to the circular convex cambered surface of magnetic pole unit B (2) adjacent with basic magnetic pole unit A (1) is the circular convex cambered surface of basic magnetic pole unit A (1) The cambered surfaces are matched, and the convex cambered surfaces of the other magnetic pole units B (2) are matched with the concave cambered surfaces of the adjacent magnetic pole units B (2).
2. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 1, wherein: the mounting surface of basic magnetic pole unit A (1), be equipped with a plurality of perpendicular to mounting surface's through-hole (3) corresponding to arc surface axle center department, equidistant in proper order along axle center extending direction, magnetic pole unit B (2) also are equipped with through-hole (3) of matching corresponding to through-hole (3) of installation basic magnetic pole unit A (1), and connecting bolt (5) pass magnetic pole unit B (2) and basic magnetic pole unit A (1) in proper order after stretch out the mounting surface to all with steel pipe magnetic leakage inspection equipment fixed connection with magnetic pole unit B (2) and basic magnetic pole unit A (1).
3. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 2, wherein: the positions of the arc surface of the basic magnetic pole unit A (1) corresponding to the through hole (3) and the positions of the circular concave arc surface of the magnetic pole unit B (2) corresponding to the through hole (3) are respectively provided with a counter bore (4) matched with a nut (6) of a connecting bolt (5).
4. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 3, wherein: when connecting bolt (5) with at least one magnetic pole unit B (2) and basic magnetic pole unit A (1) fixed connection in steel pipe magnetic leakage inspection equipment, all be equipped with adapter sleeve (10) in counter bore (4) of nut (6) contact with connecting bolt (5), adapter sleeve (10) are passed in connecting bolt (5), the material of adapter sleeve (10) is the elasticity material.
5. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 4, wherein: the outer diameter of the connecting sleeve (10) is matched with the inner diameter of the counter bore (4), the axial length of the connecting sleeve (10) is matched with the axial length of the counter bore (4), and the inner diameter of the connecting sleeve (10) is matched with the outer diameter of the connecting bolt (5).
6. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 1, wherein: the width of the basic magnetic pole unit A (1) is equal to the width and the length of the magnetic pole unit B (2), and the end faces of the four sides of the basic magnetic pole unit A (1) and the magnetic pole unit B (2) are vertical side faces perpendicular to the installation plane of the basic magnetic pole unit A (1).
7. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 1, wherein: the basic magnetic pole unit A (1) is provided with a transition fillet (7) corresponding to the joint of the end face of the two side edges of the arc surface and the arc surface, and the magnetic pole unit B (2) is provided with a transition fillet (7) corresponding to the joint of the end face of the two side edges of the circular concave arc surface and the circular concave arc surface.
8. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 7, wherein: and the magnetic pole unit B (2) is provided with an arc-shaped convex strip (8) matched with a transition fillet (7) of the adjacent magnetic pole unit B (2) in contact at the joint of the end surface corresponding to the edges of the two sides of the convex arc surface and the convex arc surface.
9. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 8, wherein: the outer side wall of the arc-shaped convex strip (8) is flush with the end surfaces of the two side edges of the circular concave arc surface corresponding to the magnetic pole unit B (2).
10. The magnetic pole for magnetic flux leakage inspection of steel pipes with various pipe diameters according to claim 1, wherein: and a chamfer (9) is arranged at the joint of the mounting plane of the basic magnetic pole unit A (1) and the end surfaces corresponding to the edges at the two sides of the arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290959.1U CN215953458U (en) | 2021-09-22 | 2021-09-22 | Magnetic leakage flaw detection magnetic pole suitable for steel pipes with various sizes and pipe diameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290959.1U CN215953458U (en) | 2021-09-22 | 2021-09-22 | Magnetic leakage flaw detection magnetic pole suitable for steel pipes with various sizes and pipe diameters |
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| Publication Number | Publication Date |
|---|---|
| CN215953458U true CN215953458U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122290959.1U Active CN215953458U (en) | 2021-09-22 | 2021-09-22 | Magnetic leakage flaw detection magnetic pole suitable for steel pipes with various sizes and pipe diameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215953458U (en) |
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2021
- 2021-09-22 CN CN202122290959.1U patent/CN215953458U/en active Active
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