CN109725052B - Support mechanism of magnetic sensor array and steel pipe longitudinal defect magnetic leakage detection device - Google Patents
Support mechanism of magnetic sensor array and steel pipe longitudinal defect magnetic leakage detection device Download PDFInfo
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- CN109725052B CN109725052B CN201910098251.0A CN201910098251A CN109725052B CN 109725052 B CN109725052 B CN 109725052B CN 201910098251 A CN201910098251 A CN 201910098251A CN 109725052 B CN109725052 B CN 109725052B
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Abstract
The application discloses a support mechanism of a magneto-dependent sensor array, which comprises a support arm, an opening and closing arm, a movable sleeve, a fixed sleeve and an adjusting screw; one end of the opening and closing arm can be rotatably connected to one end of the supporting arm, the magnetic sensor array is fixed in the middle of the opening and closing arm, the movable sleeve is sleeved inside the fixed sleeve in a sliding mode, one end of the fixed sleeve is fixed on the rotary ring, the movable sleeve is internally provided with internal threads and is in threaded connection with the adjusting screw, and the adjusting screw, the fixed sleeve, the movable sleeve and the magnetic sensor array are overlapped with the magnetized pole shoe in the orthogonal position. The application also discloses a device for detecting the longitudinal defect magnetic flux leakage of the steel pipe by using the supporting mechanism. The application has the beneficial effects that: the support mechanism is adjusted to further adjust the horizontal movement of the magnetic sensor array, so that the magnetic sensor array is always tangent to the steel pipe, the center line of the magnetic sensor array is always coincident with the orthogonal position of the magnetized pole shoe, and the magnetic sensor array is positioned at the optimal position for detecting the longitudinal defect of the steel pipe.
Description
Technical Field
The application relates to a structure applied to a magnetic leakage detection device and a device using the structure, in particular to a supporting structure applied to a magnetic sensor array and a steel pipe longitudinal magnetic leakage detection device using the structure.
Background
The supporting mechanism of the magnetic sensor array of the rotary magnetic leakage detection device for the longitudinal defects of the steel pipe with the diameter of 30-508mm is always a key technology related to the reliability and stability of the detection result. More specifically, to realize the detection of the longitudinal defects of petroleum drill pipes, oil production pipes, oil well casings, high-pressure boiler pipes and other various steel pipes by a magnetic flux leakage method, the structure and the supporting method of the sensor array supporting mechanism are critical to the detection result, and are always one of the important points of research of the same country and the same country.
The inventor researches the influence of a magnetization system on a defect magnetic leakage field in a third chapter of a special 'steel pipe magnetic leakage detection technology and system' (2 months in 2009 of mechanical industry press) and obtains the conclusion that: the pair of magnetized pole shoes are symmetrically distributed on two sides of the steel pipe, the direct-current steady magnetic field is applied to the steel pipe, and the defect leakage magnetic field is strongest and is most easy to detect on the outer surface of the steel pipe at the position orthogonal to the magnetized pole shoes; the orthogonal component of the defect leakage magnetic field has the highest signal-to-noise ratio induced in the magneto-sensitive sensor tangential to the surface of the steel pipe.
At present, the magnetic sensor array supporting mechanism in the similar steel pipe magnetic leakage detection systems of OEM company, tubscope company and Forster company in Germany in the United states internationally adopts the centrifugal force of the pendulum to drive the magnetic sensor array to be attached to the surface of the steel pipe, but the position of the supporting shaft of the pendulum causes that the magnetic sensor array cannot always be in a position orthogonal to a magnetized pole shoe when detecting steel pipes with different diameters; nor can the array of magneto-sensitive sensors be always tangential to the surface of the steel pipe. Meanwhile, the centrifugal force and the rotating speed of the pendulum bob have a direct proportion relation, and when the pendulum bob rotates rapidly, the pressure of the surface facing the steel pipe is too large and the abrasion is serious when the magnetic sensor array detects the rapid rotation; during low-speed rotation detection, the sensor cannot be attached to the steel pipe surface; also, the two sets of supporting mechanisms of the bob with complex structures are very difficult to adjust and maintain.
In China, in the detection method and device which are disclosed in the application patent 'large-caliber steel pipe non-blind area detection method and device without changing probes' (ZL 2004 1 0014046.5), the inventor presses a magneto-sensitive sensor array frame to the surface of a steel pipe by means of a spring, and when the magneto-sensitive sensor array frame also detects steel pipes with different diameters, the magneto-sensitive sensor array cannot be always positioned in a position orthogonal to a magnetized pole shoe; the magnetic sensor array cannot be tangent to the surface of the steel pipe and the like.
In addition, as shown in fig. 3, the supporting mechanism of the magnetic sensor array of the magnetic leakage detection device for the longitudinal defect of the steel pipe used in the prior art is as follows: the frame 23 presses the array of magneto-sensitive sensors 500 'against the surface of the steel tube 600' by means of the central shaft 25 and the springs 9. However, when detecting steel pipes of different diameters, it is difficult for the magneto-sensitive sensor array 500 'to be located at the position a-B orthogonal to the magnetized pole piece 300' due to the position fixing of the central shaft 25 and the action of the fixed length frame 23; the detection surface of the magnetic sensor array 500 'cannot be always tangent to the surface of the steel pipe 600', so that the defect leakage magnetic field is difficult to reliably detect, and the obtained defect signal-to-noise ratio is poor and easy to leak.
The supporting mechanism of the magnetic sensor array attached to the traditional ZDJC series steel pipe magnetic flux leakage detection system is known, and due to the reasons, the problem of longitudinal defect detection omission on the steel pipe frequently occurs; meanwhile, the replacement of the detection specification is difficult, the adjustment is tedious, and the abrasion is serious; the main technical indexes are difficult to meet the requirements of international standard ISO-10893-3-2011 (seamless and welded ferromagnetic steel pipes (except submerged arc welding) for longitudinal and/or transverse defect detection) on automatic full-periphery magnetic leakage detection, the detection sensitivity is difficult to meet the N5 level, the circumferential detection sensitivity is also difficult to meet the requirements of less than or equal to 3dB, the signal-to-noise ratio is difficult to meet the requirements of 8dB and the like.
Through investigation, the serious problems also exist in the magnetic flux leakage detection system of the series steel pipes produced by foreign companies such as TUBSCOPE in the United states.
Disclosure of Invention
The technical problems to be solved by the application are as follows: how to enable the center line of the array of magneto-sensitive sensors to be always in a position orthogonal to the magnetized pole pieces.
The application solves the technical problems through the following technical scheme: the application discloses a supporting mechanism of a magnetic sensor array, which is applied to a steel pipe longitudinal defect magnetic leakage detection device, wherein the supporting mechanism comprises a supporting arm, a folding arm, a movable sleeve, a fixed sleeve, an adjusting screw and a guiding mechanism; one end of the opening and closing arm can be rotatably connected with one end of the supporting arm, the middle part of the opening and closing arm is fixedly provided with a magnetic sensor array, the movable sleeve is sleeved inside the fixed sleeve in a sliding way through the guide mechanism, one end of the fixed sleeve is fixed on the magnetic leakage detection device, the movable sleeve is internally provided with an internal thread, one end of the adjusting screw is provided with an external thread, the adjusting screw rod passes through the rotary ring and then is connected with the internal thread of the movable sleeve, one end of the magnetic sensor array is tangent to the steel pipe, and the central lines of the adjusting screw rod, the fixed sleeve, the movable sleeve and the magnetic sensor array are always coincided with the orthogonalization position of the magnetized pole shoe on the steel pipe longitudinal defect magnetic leakage detection device.
According to the application, through rotating the adjusting screw rod, under the action of threaded connection, the moving sleeve can realize rotation and horizontal movement, and through limiting of the guide mechanism, the moving sleeve only realizes back and forth movement in the horizontal direction, and further the movement of the magnetic sensor array in the horizontal direction is adjusted, so that the magnetic sensor array always coincides with the horizontal line of the steel pipe all the time.
Preferably, the guiding mechanism comprises a guiding key and a guiding groove, the guiding key and the guiding groove can slide mutually, the guiding key is embedded in the movable sleeve, the guiding groove is a groove arranged on the inner surface of the fixed sleeve, the guiding groove is parallel to the fixed sleeve, and the guiding key is clamped into the guiding groove.
Preferably, the support mechanism further comprises a universal joint and a spring assembly; the other end of the opening and closing arm is fixedly provided with one end of a universal joint, the other end of the universal joint is connected with a spring assembly, and the spring assembly is connected with one end of the movable sleeve.
Preferably, the spring assembly comprises a spring seat, a spring frame, a spring push rod and a spring, wherein the spring is arranged in the spring seat, one end of the spring frame is fixed at one end of the spring seat, the other end of the spring frame is fixed on the movable sleeve, one end of the spring push rod is connected with the spring, and the other end of the spring push rod is connected with the universal joint.
Preferably, the support arm is provided with a first braking surface, the first braking surface is a vertical surface, the opening and closing arm is provided with a second braking surface, the second braking surface comprises a vertical surface and an inclined surface, the first braking surface is overlapped with the second braking surface, and when the first braking surface is overlapped with the vertical surface of the second braking surface, the included angle between the support arm and the opening and closing arm is the largest.
The spring is always in a compressed state, the spring has outward elasticity, the spring push rod can be pushed all the time, the spring push rod acts on the universal joint, so that a vertical surface on a second braking surface on the opening and closing arm is attached to and restrained with the first braking surface, the magneto-dependent sensor array is ensured to be in a stable state, and the support arm and the opening and closing arm are in a maximum opening angle state under the conventional condition, namely, the magneto-dependent sensor array is in an optimal position for detecting the longitudinal defect of the steel pipe; meanwhile, the included angle between the supporting arm and the opening and closing arm can be contracted, and when the bent part of the steel pipe reaches the detection position, the magnetic sensor array can be automatically pressed away from the surface of the steel pipe, so that abrasion is reduced.
Preferably, the sensor further comprises a magneto-dependent sensor regulator, and the magneto-dependent sensor regulator is fixed on the magneto-dependent sensor array. The magneto-dependent sensor regulator can finely adjust the initial position of the magneto-dependent sensor array and can be abutted against and not loosened.
Preferably, a protection inclined plane is arranged at one tangential end of the magnetic sensor array and the steel pipe. The arrangement of the protection inclined plane can enable the protection inclined plane to be extruded when the end of the steel pipe arrives, and the protection inclined plane drives the magneto-sensitive sensor array to shrink, so that collision damage is avoided.
Preferably, the rotary screw fixing device further comprises an inner fixing ring and an outer fixing ring, wherein the inner fixing ring is fixed on the inner surface of the rotary ring through screws, the fixing sleeve is fixed on the side face of the inner fixing ring, the outer fixing ring is fixed on the outer surface of the rotary ring through screws, and holes for the adjusting screw rod to pass through are formed in the inner fixing ring and the outer fixing ring. The screw bolt adjusting device further comprises a limiting plate, wherein the limiting plate is fixed on the side face of the outer fixing ring, and a hole for the adjusting screw bolt to pass through is formed in the limiting plate.
The application also provides a steel pipe longitudinal defect magnetic leakage detection device adopting the support mechanism of the magnetic sensor array, wherein the steel pipe longitudinal defect magnetic leakage detection device comprises a rotary ring, a magnetizer, a magnetizing pole shoe, the support mechanism and the magnetic sensor array; the magnetic pole shoes are symmetrically arranged on the surface, close to the steel pipe, of the magnetizer along the horizontal orthogonal surface of the steel pipe, the magnetizer and the magnetizing pole shoes are symmetrically arranged along the vertical orthogonal surface of the steel pipe, the magnetic sensor array can be arranged at one end of the supporting mechanism in an adjustable mode, the other end of the supporting mechanism is fixed on the rotary ring, one end of the magnetic sensor array is tangent to the steel pipe, and the orthogonal positions of the central line of the magnetic sensor array and the magnetizing pole shoes are always coincident.
According to the application, through the adjustable mode of the supporting mechanism, when steel pipes with different outer diameters are detected, the supporting mechanism is only adjusted, so that the magnetic sensor array can be driven to move in the linear direction, the central line of the magnetic sensor array is always coincident with the orthogonal position of the magnetized pole shoe while the magnetic sensor array is always tangential to the steel pipe, and the magnetic sensor array is positioned at the optimal position for detecting the longitudinal defects of the steel pipe; the main technical index of the longitudinal defect magnetic flux leakage detection device is obviously improved, the requirements of international standard ISO-10893-3-2011 are met and exceeded, and the stable and reliable detection operation of the longitudinal defect magnetic flux leakage detection device for the steel pipe can be realized throughout the year.
Preferably, the number of the supporting mechanisms and the magnetic sensor arrays is two, and the two supporting mechanisms and the two magnetic sensor arrays are symmetrically arranged on two sides of the perpendicular orthogonal surface of the steel pipe. Two magneto-sensitive sensor arrays are provided to realize two detection points, which increase the speed of detection by one time.
Compared with the prior art, the application has the following advantages:
(1) According to the application, through rotating the adjusting screw rod, under the action of threaded connection, the movable sleeve can realize rotation and horizontal movement, and then through limiting of the guide mechanism, the movable sleeve only realizes back and forth movement in the horizontal direction, and further, the linear movement of the magnetic sensor array in the horizontal or vertical direction is adjusted, so that the orthogonal position of the magnetic sensor array and the magnetized pole shoe on the steel pipe longitudinal defect magnetic leakage detection device always coincides, namely: the included angle between the pair of magnetized pole shoes and the central line of the magnetic sensor array is always 90 degrees, and the structure is simple and reliable to operate.
(2) According to the application, the spring is always in a compressed state, the spring has outward elasticity, the spring push rod can be pushed all the time, and the spring push rod acts on the universal joint, so that the vertical surface on the second braking surface on the opening and closing arm is attached to the first braking surface and is mutually restricted, the magneto-dependent sensor array is ensured to be in a stable state, and the support arm and the opening and closing arm are in the maximum opening angle state under the conventional condition, namely, the magneto-dependent sensor array is in the optimal position for detecting the longitudinal defects of the steel pipe; meanwhile, the included angle between the supporting arm and the opening and closing arm can be contracted, and when the bent part of the steel pipe reaches the detection position, the magneto-sensitive sensor array can be automatically pressed away from the surface of the steel pipe, so that abrasion is reduced;
(3) The arrangement of the protection inclined plane can enable the protection inclined plane to be extruded when the end of the steel pipe arrives, so that the magneto-sensitive sensor array is driven to shrink and avoid, and the magneto-sensitive sensor array is prevented from being damaged by collision.
(4) According to the application, through the adjustable mode of the supporting mechanism, when steel pipes with different outer diameters are detected, the supporting mechanism is only adjusted, so that the magnetic sensor array can be driven to move in the horizontal direction, the central line of the magnetic sensor array is always coincident with the horizontal orthogonal line of the steel pipe while the magnetic sensor array is always tangential to the steel pipe, and the magnetic sensor array is positioned at the optimal position for detecting the longitudinal defects of the steel pipe; the supporting mechanism of the magnetic sensor array of the longitudinal defect magnetic flux leakage detection device obviously improves the main technical indexes of the longitudinal defect magnetic flux leakage detection device, meets and exceeds the international standard ISO-10893-3-2011 (seamless and welded ferromagnetic steel pipe (except submerged arc welding) automatic full-periphery magnetic flux leakage detection for longitudinal and/or transverse defect detection), the detection sensitivity meets N5 or higher level, the circumferential detection sensitivity difference meets less than or equal to 3dB, the signal-noise ratio reaches and exceeds 10dB, and the stable and reliable detection operation of the steel pipe longitudinal defect magnetic flux leakage detection device can be realized throughout the year;
(5) Two magneto-sensitive sensor arrays are arranged to realize two detection points, and the two detection points increase the detection accuracy and precision and can increase the detection speed by one time;
drawings
FIG. 1 is a schematic diagram of a supporting mechanism of a magneto-dependent sensor array according to an embodiment of the present application;
fig. 2 is a schematic structural view of a magnetic flux leakage detection device using the support mechanism.
Fig. 3 is a prior art detection device.
Reference numerals in the drawings: rotary ring 100, magnetizer 200, magnetized pole piece 300, support mechanism 400, support arms 401, zhang Gebei 402, moving sleeve 403, fixed sleeve 404, adjusting screw 405, guide key 406, guide slot 407, universal joint 408, spring seat 409, spring holder 410, spring pushrod 411, spring 412, magneto-sensitive sensor adjuster 413, inner fixed ring 414, outer fixed ring 415, limiting plate 416, magneto-sensitive sensor array 500, protection bevel 501, steel tube 600.
Detailed Description
The following describes in detail the examples of the present application, which are implemented on the premise of the technical solution of the present application, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present application is not limited to the following examples.
Embodiment one:
as shown in fig. 1, a support mechanism of a magnetic sensor array is applied to a device for detecting longitudinal defect magnetic leakage of a steel pipe, wherein the support mechanism 400 comprises support arms 401, zhang Gebei, a movable sleeve 403, a fixed sleeve 404, an adjusting screw 405, a guide key 406, a guide slot 407, a universal joint 408, a spring seat 409, a spring frame 410, a spring push rod 411, a spring 412 and a magnetic sensor adjuster 413;
the support arm 401 is of an inclined structure, as shown in fig. 1, a lower left end of the support arm 401 is connected with a right end of the moving sleeve 403, an upper right end of the support arm 401 is connected with the opening and closing arm 402 through a shaft, a first braking surface 4011 is arranged at the upper right end of the support arm 401, and the first braking surface 4011 is a vertical surface and is parallel to an orthogonal vertical surface of the steel pipe 600.
Zhang Gebei 402 is a bending piece, the upper left end of the bending piece is rotatably connected to the upper end of the supporting arm 401, the middle part of the opening and closing arm 402 is fixedly connected with the magneto-sensor array 500, the bottom end of the opening and closing arm 402 is fixedly connected with the universal joint 408, wherein the fixing mode can be a fixed connection mode such as threaded connection and welding, the opening and closing arm 402 is provided with a second braking surface 4021, the second braking surface 4021 comprises a vertical surface and an inclined surface, the first braking surface 4011 and the second braking surface 4021 can be always overlapped, when the vertical surfaces of the first braking surface 4011 and the second braking surface 4021 are overlapped, the included angle between the supporting arm 401 and the opening and closing arm 402 is the largest, and when the inclined surfaces of the first braking surface 4011 and the second braking surface 4021 are overlapped, the included angle between the supporting arm 401 and the opening and closing arm 402 is reduced.
The movable sleeve 403 is of a hollow cylinder structure with one open end and one closed end, the right end of the movable sleeve 403 is of a closed structure and fixedly connected with the left end of the supporting arm 401, synchronous movement of the movable sleeve 403 and the supporting arm 401 is achieved, the left end of the movable sleeve 403 is an open end, the opening of the open end extends to the inside and is provided with a section of internal thread, the internal thread is not arranged in the whole inner cavity, the end of the internal thread is further provided with a section of smooth section, and the diameter of the smooth section is larger than that of the internal thread section.
The fixed sleeve 404 is fixed on the rotary ring 100, the inside of the fixed sleeve 404 is a penetrating cylinder structure, the diameter of the inner through hole is slightly larger than the outer diameter of the movable sleeve 403, and a sliding gap is reserved.
The right end of the adjusting screw 405 is provided with an external thread, the external thread is in threaded connection with the internal thread of the moving sleeve 403, the adjusting screw 405 passes through the rotating ring 100 from the outside of the rotating ring 100, then enters the fixed sleeve 404, finally is connected with the internal thread inside the moving sleeve 403, exceeds the internal thread section, and ends in the smooth section.
The guide key 406 and the guide slot 407 can slide mutually, wherein, part of the guide key 406 is embedded on the moving sleeve 403, part of the guide key 406 can slide in the guide slot 407 for fixed connection, the guide slot 407 is a groove arranged on the inner surface of the fixed sleeve 404, the guide slot 407 is parallel to the fixed sleeve 404, and the guide key 406 is clamped into the guide slot 407.
According to the embodiment, through rotating the adjusting screw 405, under the action of threaded connection, the moving sleeve 403 can realize left and right movement in the horizontal direction, and then through limiting of the guide key 406 and the guide groove 407, the moving sleeve 403 only realizes back and forth movement in the horizontal direction, so that the movement of the magneto-sensitive sensor array 500 in the horizontal direction is adjusted, the magneto-sensitive sensor array 500 always coincides with the horizontal orthogonal line of the steel pipe 600, and the adjusting screw 405, the fixed sleeve 404, the moving sleeve 403 coincides with the horizontal orthogonal line (A-B) of the magneto-sensitive sensor array 500 and the steel pipe 600;
it should be noted that: ensuring that the centerline of the array 500 always coincides with the orthogonal position of the magnetized pole piece 300, namely: the angle between the pair of magnetized pole pieces and the center line of the magnetic sensor array is always 90 degrees, and the orthogonal position between the pair of magnetized pole pieces 300 in fig. 1 is the horizontal orthogonal line position of the steel pipe 600.
In the embodiment, the reciprocating motion in the horizontal direction is realized through the rotary motion of the threads and the limit of the limit mechanism, the adjusting range is large, the adaptability is strong, the self-locking can be realized, and the stability is high.
In this embodiment, the universal joint 408 is disposed transversely, one end of the universal joint is fixed at the bottom end of the opening and closing arm 402, and the other end is fixedly connected with the spring push rod 411, so that the universal joint 408 is mainly adapted to power transmission and steering, and the included angle between the connected parts is allowed to change within a certain range.
The spring seat 409 in this embodiment is a hollow cylinder structure with a cavity inside, the left end is a closed end, the right end is an open end, the spring 412 can be placed into the spring seat 409 through the open end, and the spring seat 409 mainly functions to accommodate the spring 412 and form linkage with the support arm 401, so the structure of the spring seat 409 is not limited to the structure in this embodiment, but may be other structures, such as a structure with a plurality of upright rods arranged in parallel at the cavity.
The spring frame 410 is of a plate structure, the upper end of which is fixed with the movable sleeve 403, and the lower end of which is fixed with the spring seat 409, and the fixing manner may be welding, screw connection, etc., however, the spring frame 410 may also be of other structures capable of realizing fixed connection, such as a connecting rod, etc.
The spring push rod 411 is a cylindrical rod, the right end of which is fixedly connected with the universal joint 408, and the left end of which is fixedly connected with the spring 412.
The spring 412 is always in a compressed state, the spring 412 has an outward elastic force, and can always push the spring push rod 411, and the spring push rod 411 acts on the universal joint 408, so that a vertical plane on the second braking surface 4021 on the opening and closing arm 402 is bonded with the first braking surface 4011 and mutually restricted, the magneto-sensor array 500 is ensured to be in a stable state, and conventionally, the support arm 401 and the opening and closing arm 402 are in a maximum opening angle state, namely, an optimal position for detecting the longitudinal defect of the steel pipe 600;
meanwhile, the included angle between the supporting arm 401 and the opening and closing arm 402 can be contracted, when the bent part or the end head of the steel pipe 600 reaches the detection position, the steel pipe can be extruded leftwards, at the moment, the inclined surface on the second braking surface 4021 on the opening and closing arm 402 is attached to the first braking surface 4011, the included angle between the supporting arm 401 and the opening and closing arm 402 is reduced, and the magnetic sensor array 500 can be automatically pressed away from the surface of the steel pipe 600, so that abrasion is reduced.
In this embodiment, a support mechanism for a magneto-dependent sensor array further includes a magneto-dependent sensor adjuster 413, and the magneto-dependent sensor adjuster 413 fixes the left end of the magneto-dependent sensor array 500. Specifically, the magneto-dependent sensor adjuster 413 is a screw, and the initial position of the magneto-dependent sensor array 500 can be finely adjusted and kept tight by rotating the screw magneto-dependent sensor adjuster 413.
The working procedure of the first embodiment is as follows:
as shown in fig. 1-2, the steel pipe 600 is located at the central axis of the rotary ring 100, the micro-adjustment magneto-sensor array 500 is abutted against the left side and the right side of the steel pipe 600, the magnetization pole shoes 300 are symmetrically distributed on the upper side and the lower side of the steel pipe 600, the direct-current steady magnetic field is applied to the steel pipe 600, the micro-adjustment magneto-sensor array 500 detects defects on the outer surface of the steel pipe 600 at the position orthogonal to the magnetization pole shoes 300, at this time, the vertical surface on the second braking surface 4021 on the opening and closing arm 402 is bonded with the first braking surface 4011 and mutually restricted, and the included angle between the supporting arm 401 and the opening and closing arm 402 is in the maximum state;
when steel pipes 600 with different diameters need to be detected, the adjusting screw 405 is rotated, the moving sleeve 403 moves left and right in the horizontal direction under the combined action of the threaded connection and the limit of the guide key 406 and the guide groove 407, and in the process, the magnetic sensor array 500 always coincides with the horizontal center line of the steel pipe 600;
when the bent portion or the end of the steel tube 600 reaches the detection position, the steel tube 600 presses the magneto-sensitive sensor array 500 leftwards, so that the pressing spring 412 presses the opening and closing arm 402 to rotate around the shaft, the inclined surface of the second braking surface 4021 on the opening and closing arm 402 is attached to the first braking surface 4011, the included angle between the supporting arm 401 and the opening and closing arm 402 is reduced, and the magneto-sensitive sensor array 500 can be automatically pressed away from the surface of the steel tube 600, so that abrasion is reduced.
Embodiment two:
the difference between this embodiment and the first embodiment is that:
as shown in fig. 1, a protection bevel 501 is disposed at one end of the magneto-dependent sensor array 500 tangential to the steel pipe 600. The arrangement of the protection inclined plane 501 can enable the protection inclined plane 501 to be extruded when the end of the steel pipe 600 arrives, so as to drive the magneto-sensitive sensor array 500 to shrink and avoid, and avoid the magneto-sensitive sensor array 500 from being crashed, wherein the protection inclined plane 501 can be a protection material adhered to the end of the magneto-sensitive sensor array 500.
The working procedure of the second embodiment is as follows:
the same operation procedure as in the first embodiment is different in that, due to the arrangement of the protection slope 501, when the bent portion or the end of the steel pipe 600 reaches the detection position, the steel pipe 600 protects the slope 501, so as to avoid squeezing the magneto-sensitive sensor array 500, and protect the magneto-sensitive sensor array 500 from being crashed or damaged.
Embodiment III:
the difference between this embodiment and the second embodiment is that:
as shown in fig. 1, on the basis of the second embodiment, the supporting mechanism of the magnetic sensor array further includes an inner fixing ring 414 and an outer fixing ring 415, the inner fixing ring 414 is fixed on the inner surface of the rotating ring 100 by screws, the fixing sleeve 404 is fixed on the right side surface of the inner fixing ring 414, the outer fixing ring 415 is fixed on the outer surface of the rotating ring 100 by screws, and the inner fixing ring 414 and the outer fixing ring 415 are provided with holes for the adjusting screws 405 to pass through; and further comprises a limiting plate 416, wherein the limiting plate 416 is fixed on the left side surface of the outer fixing ring 415, and the limiting plate 416 is provided with a hole for the adjusting screw 405 to pass through.
The inner fixing ring 414 is an adapter for realizing the fixing sleeve 404 and the rotating circular arc 100, and the outer fixing ring 415 is an adapter for realizing the limiting plate and the rotating circular arc 100.
The hole in the limiting plate 416 for passing through the adjusting screw 405 is limited to just pass through, and the diameter of the hole is equal to or slightly larger than the diameter of the adjusting screw 405, so that the limiting plate 416 can limit the adjusting screw 405, ensure that the center line of the adjusting screw 405 coincides with the line a-B (a-B is the orthogonal horizontal line of the steel pipe 600), and can only rotate in situ and cannot move radially.
Since the inner and outer surfaces of the rotary circular ring 100 are circular arcs, the left side surface of the inner fixing ring 414 is a circular arc surface and is bonded to the inner side surface of the rotary circular ring 100, the left side surface is a plane, the right side surface of the outer fixing ring 415 is a circular arc surface and is bonded to the outer side surface of the rotary circular ring 100, and the left side surface is a plane.
The adjusting screw 405 sequentially passes through the limiting plate 416, the outer fixing ring 415, the rotary ring 100 and the inner fixing ring 414, then enters the fixing sleeve 404, and is in threaded connection with the moving sleeve 403.
The working procedure of the third embodiment is the same as that of the second embodiment.
As shown in fig. 2, in combination with fig. 1, the present application further provides a magnetic flux leakage detection device using a support mechanism of a magneto-dependent sensor array, where the magnetic flux leakage detection device includes a rotating ring 100, a magnetizer 200, a magnetized pole piece 300, a support mechanism 400, and a magneto-dependent sensor array 500; the steel pipe 600 coincides with the central axis of the rotary ring 100, the magnetizer 200 is symmetrically arranged on the inner surface of the rotary ring 100 along the horizontal orthogonal plane (A-B) of the steel pipe 600, the magnetized pole shoe 300 is symmetrically arranged on the surface of the magnetizer 200 close to the steel pipe 600 along the horizontal orthogonal plane of the steel pipe 600, and the magnetizer 200 and the magnetized pole shoe 300 are symmetrically arranged along the vertical orthogonal plane of the steel pipe 600; the array of magnetosensitive sensors 500 always coincides with the orthogonal position of the magnetized pole piece 300.
As shown in fig. 2, the support mechanism 400 on the left side in fig. 2 is taken as an example, the left end of the magneto-dependent sensor array 500 is mounted on the right end of the support mechanism 400, the left end of the support mechanism 400 is fixed on the rotary ring 100, the right end of the magneto-dependent sensor array 500 is tangential to the steel pipe 600, and the center line of the magneto-dependent sensor array 500 always coincides with the horizontal center line of the steel pipe 600.
Wherein, the two support mechanisms 400 and the two magneto-sensitive sensor arrays 500 are symmetrically arranged on two sides of the vertical orthogonal surface of the steel pipe 600, and the two magneto-sensitive sensor arrays 500 are arranged to realize two detection points, one detection point can realize detection, but the arrangement of the two symmetrical detection points can increase the accuracy and the precision of detection and can increase the detection speed by one time.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. The supporting mechanism of the magnetic sensor array is applied to a steel pipe longitudinal defect magnetic leakage detection device and is characterized by comprising a supporting arm, an opening and closing arm, a movable sleeve, a fixed sleeve, an adjusting screw and a guide mechanism; one end of the opening and closing arm can be rotatably connected with one end of the supporting arm, the middle part of the opening and closing arm is fixedly provided with a magnetic sensor array, the movable sleeve is sleeved inside the fixed sleeve in a sliding way through the guide mechanism, one end of the fixed sleeve is fixed on the magnetic leakage detection device, the movable sleeve is internally provided with an internal thread, one end of the adjusting screw is provided with an external thread, the adjusting screw rod passes through the rotary ring and then is connected with the internal thread of the movable sleeve, one end of the magnetic sensor array is tangent to the steel pipe, and the central lines of the adjusting screw rod, the fixed sleeve, the movable sleeve and the magnetic sensor array are always coincided with the orthogonalization position of the magnetized pole shoe on the steel pipe longitudinal defect magnetic leakage detection device.
2. The support mechanism of claim 1, wherein the guide mechanism comprises a guide key and a guide groove, the guide key is partially embedded in the movable sleeve, the guide groove is a groove arranged on the inner surface of the fixed sleeve, the guide groove is parallel to the fixed sleeve, and the guide key is clamped into the guide groove.
3. The support mechanism for a magnetoresistive sensor array of claim 1 further comprising a gimbal, spring assembly; the other end of the opening and closing arm is fixedly provided with one end of a universal joint, the other end of the universal joint is connected with a spring assembly, and the spring assembly is connected with one end of the movable sleeve.
4. A support mechanism for a magnetoresistive sensor array according to claim 3, wherein the spring assembly comprises a spring seat, a spring holder, a spring push rod, and a spring, wherein the spring is disposed in the spring seat, one end of the spring holder is fixed at one end of the spring seat, the other end of the spring holder is fixed on the moving sleeve, one end of the spring push rod is connected with the spring, and the other end is connected with the universal joint.
5. The support mechanism of claim 1, wherein the support arm is provided with a first braking surface, the first braking surface is a vertical surface, the opening and closing arm is provided with a second braking surface, the second braking surface comprises a vertical surface and an inclined surface, the first braking surface is coincident with the second braking surface, and when the first braking surface is coincident with the vertical surface of the second braking surface, the included angle between the support arm and the opening and closing arm is the largest.
6. The support mechanism for a magnetoresistive sensor array of claim 1 further comprising a magnetoresistive sensor regulator, the magnetoresistive sensor regulator securing the magnetoresistive sensor array.
7. The support mechanism for a magneto-dependent sensor array of claim 1, wherein a protective bevel is provided at an end of the magneto-dependent sensor array tangential to the steel pipe.
8. The support mechanism of a magneto-dependent sensor array of claim 1, further comprising an inner fixing ring fixed to an inner surface of the rotating ring by screws, a fixing sleeve fixed to a side surface of the inner fixing ring, an outer fixing ring fixed to an outer surface of the rotating ring by screws, and the inner fixing ring and the outer fixing ring provided with holes for the adjustment screws to pass through; the screw bolt adjusting device further comprises a limiting plate, wherein the limiting plate is fixed on the side face of the outer fixing ring, and a hole for the adjusting screw bolt to pass through is formed in the limiting plate.
9. A steel pipe longitudinal defect magnetic leakage detection device adopting the support mechanism of the magnetic sensor array of claim 1, wherein the steel pipe longitudinal defect magnetic leakage detection device comprises a rotary ring, a magnetizer, a magnetizing pole shoe, a support mechanism and the magnetic sensor array; the magnetic sensor array is arranged at one end of the supporting mechanism in an adjustable mode, the other end of the supporting mechanism is fixed on the rotary ring, one end of the magnetic sensor array is tangent to the steel tube, and the center line of the magnetic sensor array is always coincident with the orthogonal position of the magnetic pole shoe.
10. The device for detecting the longitudinal defect and magnetic leakage of the steel pipe according to claim 9, wherein the number of the supporting mechanisms and the magnetic sensor arrays is two, and the supporting mechanisms and the magnetic sensor arrays are symmetrically arranged on two sides of a vertical orthogonal surface of the steel pipe.
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