CN108828056B - Wire rope's detection device - Google Patents
Wire rope's detection device Download PDFInfo
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- CN108828056B CN108828056B CN201810646150.8A CN201810646150A CN108828056B CN 108828056 B CN108828056 B CN 108828056B CN 201810646150 A CN201810646150 A CN 201810646150A CN 108828056 B CN108828056 B CN 108828056B
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
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Abstract
The embodiment of the invention discloses a steel wire rope detection device, which comprises: a circumferential magnetizer; a first radial magnetizer disposed on a first side of the circumferential magnetizer, and a second radial magnetizer disposed on a second side opposite the first side of the circumferential magnetizer; the magnetic conduction component is arranged between the first radial magnetizer and the second radial magnetizer, and the inner diameter of the magnetic conduction component is larger than or equal to the outer diameter of the circumferential magnetizer; and the magnetism isolating component is arranged between the magnetism conducting component and the circumferential magnetizer. According to the technical scheme provided by the embodiment of the invention, the circumferential magnetic field, the radial magnetic field and the axial magnetic field wrapping the circumferential magnetic field are arranged around the steel wire rope to be detected, so that the spatial magnetic field distribution change condition caused by the internal damage of the steel wire rope is reflected in a multi-angle and omnibearing manner from space, the damage is detected according to the change information of the spatial magnetic field distribution, and the detection reliability is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of nondestructive testing of steel wire ropes, in particular to a device for testing a steel wire rope.
Background
The steel wire rope has the advantages of high tensile strength, light dead weight, good elasticity, stable and reliable work, strong dynamic load bearing and overload capacity and the like, and is widely applied to various departments of national economic construction such as coal mines, non-coal mines, ports, bridges, cableways, elevators and the like in China. However, as an engineering bearing device, the steel wire rope is often affected by complex working conditions and environments such as bending fatigue, abrasion, alternating load, mechanical impact and corrosion in the running process, and phenomena such as wire breakage, abrasion, deformation and corrosion are inevitably caused, so that potential safety hazards exist. The damage condition and the bearing capacity are directly related to personnel and production safety.
Therefore, in order to ensure safe and reliable operation of the steel wire rope, expert scholars at home and abroad are always exploring a nondestructive testing method of the steel wire rope. The electromagnetic detection method is one of the most practical detection methods currently accepted, but has certain defects in the aspect of detection reliability of the steel wire rope with small overall longitudinal damage (such as 1-2 broken wires, a gap between the broken wires not more than 3mm, inside the steel wire rope and the like).
Disclosure of Invention
In view of the above, the embodiment of the invention provides a detection device for a steel wire rope, which reflects the change condition of the spatial magnetic field distribution caused by the damage in the steel wire rope from multiple angles in space and all directions, detects the damage according to the change information of the spatial magnetic field distribution, and improves the detection reliability.
The embodiment of the invention provides a steel wire rope detection device, which comprises:
a circumferential magnetizer;
a first radial magnetizer disposed on a first side of the circumferential magnetizer, and a second radial magnetizer disposed on a second side opposite the first side of the circumferential magnetizer;
a magnetically permeable member disposed between the first radial magnetizer and the second radial magnetizer, the magnetically permeable member having an inner diameter greater than or equal to an outer diameter of the circumferential magnetizer;
and the magnetism isolating component is arranged between the magnetic conducting component and the circumferential magnetizer.
Optionally, the first radial magnetizer comprises a first annular permanent magnet, and the outer side of the first annular permanent magnet is an N pole and the inner side of the first annular permanent magnet is an S pole or the outer side of the first annular permanent magnet is an S pole and the inner side of the first annular permanent magnet is an N pole;
the second radial magnetizer comprises a second annular permanent magnet, wherein the outer side of the second annular permanent magnet is an S pole and the inner side of the S pole is an N pole or the outer side of the second annular permanent magnet is an N pole and the inner side of the N pole is an S pole.
Optionally, the circumferential magnetizer includes a third ring-shaped permanent magnet, and the third ring-shaped permanent magnet includes a plurality of sector-shaped permanent magnets.
Optionally, the magnetically permeable member includes an armature disposed between the first annular permanent magnet and the second annular permanent magnet.
Optionally, the device further comprises a plurality of magnetic signal detection elements;
the ring detection support is used for supporting the detection elements, and the magnetic signal detection elements are uniformly distributed on the ring detection support;
the outer surface of the circular ring detection support is contacted with the inner surface of the third annular permanent magnet.
Optionally, the inner diameter of the circular ring detection support ranges from 55 mm or more to 55 mm or less.
Optionally, the device further comprises a signal transmission element, wherein the signal transmission element is arranged inside the armature, and a signal input end of the signal transmission element is electrically connected with a signal output end of the detection element;
the signal output end of the signal transmission element is electrically connected with the signal input end of the controller.
Optionally, the inner diameter of the first annular permanent magnet is larger than the outer diameter of the third annular permanent magnet;
the inner diameter of the second annular permanent magnet is larger than the outer diameter of the third annular permanent magnet.
Optionally, the inner diameter of the first annular permanent magnet is equal to the inner diameter of the second annular permanent magnet;
the outer diameter of the first annular permanent magnet is equal to the outer diameter of the second annular permanent magnet.
Optionally, a distance between the first annular permanent magnet and the third annular permanent magnet is equal to a distance between the second annular permanent magnet and the third annular permanent magnet.
The embodiment of the invention provides a detection device for a steel wire rope, wherein a circumferential magnetic field, a radial magnetic field and an axial magnetic field wrapping the circumferential magnetic field are arranged around the steel wire rope to be detected, so that the spatial magnetic field distribution change condition caused by the internal damage of the steel wire rope is reflected in a multi-angle and omnibearing manner from space, the damage is detected according to the change information of the spatial magnetic field distribution, and the detection reliability is improved.
Drawings
Fig. 1 is a schematic structural diagram of a steel wire rope detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another steel wire rope detecting device according to an embodiment of the present invention;
FIG. 3 is a left side view of a third ring-shaped permanent magnet;
fig. 4 is a schematic structural view of the circular ring detecting bracket.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a steel wire rope detection device according to an embodiment of the present invention. Referring to fig. 1, the apparatus includes: a circumferential magnetizer 10; a first radial magnetizer 20 disposed on a first side of the circumferential magnetizer 10, and a second radial magnetizer 30 disposed on a second side opposite the first side of the circumferential magnetizer 10; a magnetically permeable member 40 disposed between the first radial magnetizer 20 and the second radial magnetizer 30, the magnetically permeable member 40 having an inner diameter greater than or equal to the outer diameter of the circumferential magnetizer 10; the magnetism isolating member 50 is provided between the magnetism conducting member 40 and the circumferential magnetizer 10.
In this embodiment, the circumferential magnetizer 10 may generate a magnetic field in the circumferential direction of the magnetizer. The circumferential magnetizer circumferentially magnetizes the wire rope 60 to be tested. The first radial magnetizer 20 and the second radial magnetizer 30 can generate a radial magnetic field to radially magnetize the wire rope 60 to be tested. The magnetizer in the embodiment is arranged in a structure mode of being split up and down and capable of being opened and closed, so that the magnetizer is convenient to install in the field detection process. The first radial magnetizer 20 and the second radial magnetizer 30 may also generate an axial magnetic field due to the magnetically conductive member 40 disposed between the first radial magnetizer 20 and the second radial magnetizer 30. A magnetizing field in multiple directions of radial, circumferential and axial directions is generated in the middle of the wire rope 60 to be tested, so that the wire rope 60 to be tested is magnetized in multiple loops in multiple directions. The change amount of the spatial magnetic field generated by the omnibearing damage of the steel wire rope 60 to be detected is mapped to the change of the multidimensional spatial magnetic field, so that the comprehensive analysis and diagnosis are performed on the damage of the steel wire rope by comprehensively detecting the change condition of the spatial magnetic field. The existing electromagnetic detection method for the damage of the steel wire rope generally needs to carry out axial saturation and uniform magnetization on the steel wire rope to detect the change amount of magnetic signals formed by the damage of the steel wire rope. The damaged steel wire rope magnetizing field is a three-dimensional space magnetic field, especially for longitudinal damage distributed in the steel wire rope, single axial magnetization cannot comprehensively reflect damage information from all-dimensional multiple angles, and phenomena such as missing detection and misjudgment are easy to occur. Compared with the traditional detection device for magnetizing the steel wire rope in a single axial direction or a radial direction, the detection device provided by the embodiment has the advantage of being capable of comprehensively detecting damage distributed on the whole part of the steel wire rope. The magnetically permeable member 40 may be made of magnetically permeable material. The magnetism isolating member 50 may be made of magnetism isolating material for preventing mutual interference of the axial magnetic field between the first radial magnetizer 20 and the second radial magnetizer 30 and the circumferential magnetic field generated by the circumferential magnetizer 10, and for supporting the circumferential magnetizer 10.
According to the detection device for the steel wire rope, provided by the embodiment of the invention, the radial magnetizer radially magnetizes the steel wire rope, the circumferential magnetizer circumferentially magnetizes the steel wire rope, and the two radial magnetizers are connected together by the magnetic conduction component to form a closed magnetization loop. The radial magnetizer and the circumferential magnetizer are isolated by a magnetism isolating component, so that the two magnetizing loops are mutually independent and are not influenced. The magnetic structure of a small loop formed by a circumferential magnetic field and the magnetic structure of a large loop formed by a radial magnetic field and an axial magnetic field wrapping the circumferential magnetic field are arranged around the steel wire rope to be detected, the distribution change condition of the spatial magnetic field caused by the internal damage of the steel wire rope is reflected in a multi-angle and all-round manner from the space, the damage is detected according to the change information of the distribution of the spatial magnetic field, the reliability of detection is improved, and the comprehensive and non-missing detection of the damage of the steel wire rope, especially the various small longitudinal damage and the internal damage distributed at different positions of the circumference of the steel wire rope, has a good identification effect.
Optionally, on the basis of the above technical solution, the first radial magnetizer 20 includes a first annular permanent magnet, where the outer side of the first annular permanent magnet is an N pole and the inner side of the first annular permanent magnet is an S pole or the outer side is an S pole and the inner side of the first annular permanent magnet is an N pole; the second radial magnetizer comprises a second annular permanent magnet, wherein the outer side of the second annular permanent magnet is the inner side of the S pole and the N pole or the outer side is the inner side of the N pole and the S pole. Illustratively, when the first radial magnetizer 20 includes a first annular permanent magnet that is outboard of the N pole and inboard of the S pole, the second radial magnetizer 30 includes a second annular permanent magnet that is outboard of the S pole and inboard of the N pole. When the first radial magnetizer 20 includes a first ring-shaped permanent magnet with an outer side of an S-pole and an inner side of an N-pole, the second radial magnetizer 30 includes a second ring-shaped permanent magnet with an outer side of an N-pole and an inner side of an S-pole. It should be noted that the first annular permanent magnet and the second annular permanent magnet may include an upper permanent magnet and a lower permanent magnet.
Taking the example that the outer side of the first ring-shaped permanent magnet included in the first radial magnetizer 20 is the inner side of the N pole and the inner side of the S pole is the N pole as an example, the second ring-shaped permanent magnet included in the second radial magnetizer 30 can generate a first radial magnetic field H1, and the second radial magnetizer can generate a second radial magnetic field H2, see fig. 2. An axial magnetic field H3 may be formed between the first radial magnetizer and the second radial magnetizer. The first radial magnetic field, the second radial magnetic field, and the axial magnetic field may form a closed magnetic field.
Alternatively, referring to fig. 3, the circumferential magnetizer 10 includes a third ring-shaped permanent magnet that includes a plurality of sector-shaped permanent magnets 11. Among the adjacent two sector permanent magnets, the N pole of one sector permanent magnet is in contact with the S pole of the other sector permanent magnet to form a circumferential magnetic field H4. It should be noted that, the specific numerical values of the sector permanent magnet are not limited in the embodiment of the present invention, and those skilled in the art can set the values according to the actual situation.
Optionally, the magnetically permeable member 40 in the detection device includes an armature disposed between the first annular permanent magnet and the second annular permanent magnet. The armature is used to form a closed magnetic circuit. The armature is typically made of a soft magnetic material such as pure iron, cast iron, silicon steel, permalloy, and the like.
Optionally, referring to fig. 4, the detection device further comprises a plurality of magnetic signal detection elements 70; the ring detection support, the ring detection support 80 is used for supporting the magnetic signal detection elements 70, and the magnetic signal detection elements 70 are uniformly distributed on the ring detection support 80; the outer surface of the ring detection support 80 is in contact with the inner surface of the third ring-shaped permanent magnet (not shown). Alternatively, the number of ring detection holders 80 may be plural, and 2 are exemplary. Alternatively, the magnetic signal detection element comprises a hall device or a magneto-resistive sensing device. Alternatively, the inner diameter of the annular sensing support 80 may range from greater than or equal to 35 millimeters to less than or equal to 55 millimeters. The distance between the surface corresponding to the inner diameter of the circular ring detection support 80 and the steel wire rope to be detected is more than or equal to 5 mm and less than or equal to 25 mm. A certain gap is reserved between the circular ring detection support and the steel wire rope to be detected, so that friction between the circular ring detection support and the steel wire rope to be detected in the detection process is avoided, and the normal detection process of the steel wire rope to be detected is ensured.
Optionally, the inner diameter of the first annular permanent magnet is larger than the outer diameter of the third annular permanent magnet; the inner diameter of the second annular permanent magnet is larger than the outer diameter of the third annular permanent magnet. Optionally, the inner diameter of the first annular permanent magnet is equal to the inner diameter of the second annular permanent magnet; the outer diameter of the first annular permanent magnet is equal to the outer diameter of the second annular permanent magnet. Optionally, the distance between the first annular permanent magnet and the third annular permanent magnet is equal to the distance between the second annular permanent magnet and the third annular permanent magnet. Taking the wire rope detection device shown in fig. 2 as an example, a closed magnetic field is formed on the surface of the wire rope to be detected, the axial magnetic field H3 is orthogonal to the first radial magnetic field H1 and the second radial magnetic field H2, and the formed closed magnetic field is larger than the magnetic field of the circumferential magnetic field H4. The axial magnetic field H3 is orthogonal to the circumferential magnetic field H4 at the same time.
It should be noted that, in the embodiment of the present invention, specific numerical values of the inner diameters, the outer diameters and the lengths of the first annular permanent magnet, the second annular permanent magnet and the third annular permanent magnet are not limited, and may be set by a person skilled in the art according to actual situations.
Optionally, the detection device further comprises a signal transmission element, which is arranged inside the armature, and a signal input end of the signal transmission element is electrically connected with a signal output end of the detection element; the signal output end of the signal transmission element is electrically connected with the signal input end of the controller.
Taking the wire rope detection device shown in fig. 2 as an example, a closed magnetic field is formed on the surface of the wire rope to be detected, the axial magnetic field H3 is orthogonal to the first radial magnetic field H1 and the second radial magnetic field H2, and the formed closed magnetic field is larger than the magnetic field of the circumferential magnetic field H4. The axial magnetic field H3 is orthogonal to the circumferential magnetic field H4 at the same time. The magnetic signal detection element arranged on the annular detection support between the circumferential magnetizer and the steel wire rope to be detected is used for detecting the change condition of the space multidimensional orthogonal magnetic field on the surface of the steel wire rope to be detected, and the change of magnetic flux can be exemplified. The magnetic signal detection element converts the detected change of the magnetic field into an electric signal corresponding to the change of the magnetic field and sends the electric signal to the signal transmission element. The signal transmission element sends the electric signal to the controller, and the controller analyzes the defect in the steel wire rope to be detected according to the received electric signal corresponding to the change condition of the magnetic field on the surface of the steel wire rope to be detected, so that the damage of the steel wire rope is judged from all directions.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A wire rope detection device, comprising:
a circumferential magnetizer; the circumferential magnetizer comprises a third annular permanent magnet, wherein the third annular permanent magnet comprises a plurality of sector permanent magnets, and the N pole of one sector permanent magnet is contacted with the S pole of the other sector permanent magnet in two adjacent sector permanent magnets to form a circumferential magnetic field;
a first radial magnetizer disposed on a first side of the circumferential magnetizer, and a second radial magnetizer disposed on a second side opposite the first side of the circumferential magnetizer; the first radial magnetizer comprises a first annular permanent magnet, wherein the outer side of the first annular permanent magnet is an N pole, the inner side of the first annular permanent magnet is an S pole, or the outer side of the first annular permanent magnet is an S pole, and the inner side of the first annular permanent magnet is an N pole; the second radial magnetizer comprises a second annular permanent magnet, wherein the outer side of the second annular permanent magnet is an S pole, the inner side of the S pole is an N pole, or the outer side of the second annular permanent magnet is an N pole, and the inner side of the N pole is an S pole; wherein when the outer side of the first annular permanent magnet included in the first radial magnetizer is an N pole and the inner side of the first annular permanent magnet is an S pole, the outer side of the second annular permanent magnet included in the second radial magnetizer is an S pole and the inner side of the second annular permanent magnet is an N pole; when the outer side of the first annular permanent magnet included in the first radial magnetizer is an S pole and the inner side of the S pole is an N pole, the outer side of the second annular permanent magnet included in the second radial magnetizer is an N pole and the inner side of the S pole;
a magnetically permeable member disposed between the first radial magnetizer and the second radial magnetizer, the magnetically permeable member having an inner diameter greater than or equal to an outer diameter of the circumferential magnetizer; the radial magnetizer radially magnetizes the steel wire rope, the circumferential magnetizer circumferentially magnetizes the steel wire rope, the magnetic conduction component connects the two radial magnetizers together to form a closed magnetization loop, the radial magnetizer is isolated from the circumferential magnetizer through the magnetism isolating component, and the two magnetization loops are mutually independent;
and the magnetism isolating component is arranged between the magnetic conducting component and the circumferential magnetizer.
2. The detecting device according to claim 1, wherein,
the magnetically permeable member includes an armature disposed between the first annular permanent magnet and the second annular permanent magnet.
3. The detecting device according to claim 1, wherein,
a plurality of magnetic signal detection elements;
the ring detection support is used for supporting the magnetic signal detection elements, and the magnetic signal detection elements are uniformly distributed on the ring detection support;
the outer surface of the circular ring detection support is contacted with the inner surface of the third annular permanent magnet.
4. The detecting device according to claim 3, wherein,
the inner diameter of the circular ring detection support is in a range of more than or equal to 35 mm and less than or equal to 55 mm.
5. The detecting device according to claim 2, wherein,
the signal transmission element is arranged inside the armature, and a signal input end of the signal transmission element is electrically connected with a signal output end of the magnetic signal detection element;
the signal output end of the signal transmission element is electrically connected with the signal input end of the controller.
6. The detecting device according to claim 1, wherein,
the inner diameter of the first annular permanent magnet is larger than the outer diameter of the third annular permanent magnet;
the inner diameter of the second annular permanent magnet is larger than the outer diameter of the third annular permanent magnet.
7. The detecting device according to claim 6, wherein,
the inner diameter of the first annular permanent magnet is equal to the inner diameter of the second annular permanent magnet;
the outer diameter of the first annular permanent magnet is equal to the outer diameter of the second annular permanent magnet.
8. The detecting device according to claim 7, wherein,
the distance between the first annular permanent magnet and the third annular permanent magnet is equal to the distance between the second annular permanent magnet and the third annular permanent magnet.
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| CN201810646150.8A CN108828056B (en) | 2018-06-21 | 2018-06-21 | Wire rope's detection device |
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