CN209821125U - Tubular product internal penetration array probe based on segmented orthogonal excitation - Google Patents
Tubular product internal penetration array probe based on segmented orthogonal excitation Download PDFInfo
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- CN209821125U CN209821125U CN201822159135.9U CN201822159135U CN209821125U CN 209821125 U CN209821125 U CN 209821125U CN 201822159135 U CN201822159135 U CN 201822159135U CN 209821125 U CN209821125 U CN 209821125U
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Abstract
The utility model relates to a tubular product internal penetration array probe based on segmented orthogonal excitation, which comprises an orthogonal excitation part, a probe framework and a detection part; the orthogonal excitation part comprises a cross magnetic core and a winding coil wound on the cross magnetic core; the probe framework is of a hollow cylindrical structure, a circle of cross grooves are uniformly formed in the circumferential direction of the outer surface of the probe framework and used for placing a cross magnetic core, and the included angle between the long arm of the cross magnetic core and the circumferential direction of the pipe is 45 degrees; four small circular grooves are arranged in four quadrants of the cross-shaped magnetic core and used for placing the disc coil; the detection part is a disc coil placed in four quadrants of the cross magnetic core; four disc coils in four quadrants of each cross magnetic core form a four-coil unit group. The utility model discloses compromise and be the detection of the defect of different angles with tubular product, set up the defect that can realize arbitrary direction through the reasonable chronogenesis of detecting, do to restrain and carry away from the influence to the testing result with circumstances such as probe slope.
Description
Technical Field
The utility model belongs to the eddy current inspection field of wearing formula in the thick non-ferromagnetism heat-transfer pipe of tubule footpath thin wall, concretely relates to wear array probe in tubular product based on segmentation quadrature excitation.
Background
Heat exchangers are important components of heat conversion systems in various industries, and heat transfer tubes are heat transfer media and pressure boundaries of heat exchangers, and the integrity of the heat transfer tubes is critical to the normal operation of the heat exchangers. However, during the manufacturing and using processes of the heat transfer tube, various types of defects are often generated due to differences in the material, design structure, processing technology and operation conditions of the tube.
The nondestructive inspection of heat transfer tubes of heat exchangers generally uses an eddy current inspection method. The axial-wound coil probe is widely used, the self-receiving technology (exciting an electromagnetic field by the coil and receiving the electromagnetic field fed back by a detected object) is adopted by the axial-wound coil, the axial-wound probe has high sensitivity on axial linear defects and circular defects of the inner wall and the outer wall of the heat transfer pipe, and the defects can be timely and accurately found and quantified. However, for small and narrow circumferential defects, the direction is parallel to the direction of the electromagnetic field excited by the wound coil, so that the wound probe is difficult to find. Meanwhile, in the areas of the supporting plate and the tube plate, particularly the latter, structural signals are complex, and multiple structures such as tube expansion, tube plates and the like exist, so that electromagnetic signals are distorted in the areas, and if defects appear in the areas, the detection is easy to miss, and a detection blind area appears. Aiming at the situation, a new technology, namely an array probe technology, is started to be used in the eddy current detection of the evaporator at home and abroad, and the technology has the detection efficiency of an eddy current shaft-wound probe and the defect qualitative capability of a rotary probe.
At present, the eddy current array probe (see fig. 1) applied to engineering practice adopts a transceiving technology (one coil excites an electromagnetic field, and the other coil or coils receive the electromagnetic field of an object to be detected), two rows or three rows of small flat coil groups are arranged in the circumferential direction of a probe main body, a distance is reserved between each row of small flat coil groups, the coils of each row are arranged in a crossed manner, and eddy current signals are excited and received in a time-sharing manner through a multiplexing technology, so that the purpose of electromagnetic field rotation is achieved, and the eddy current array probe is used for eddy current inspection. However, the inspection and judgment of circumferential and axial defects are realized by a complex time sequence design, so that the requirements on inspection and analysis personnel are high. This patent has then designed a structure based on section orthogonal excitation wears array probe in novel tubular product, can realize week, quick inspection and the judgement of axial defect through simple chronogenesis setting.
Disclosure of Invention
The utility model aims to provide a: the utility model provides an array eddy current inspection probe that built-in segmentation orthogonal excitation disk coil that detects to tubular structure defect received, the utility model discloses the probe can detect tubular product hoop defect and axial defect simultaneously, adopts the oblique placement of orthogonal coil to compromise the detection of the defect that is different angles with tubular product; for conventional tubular structure eddy current inspection probe, the utility model discloses a reasonable detection chronogenesis setting can realize the defect of arbitrary direction, does to restrain to carry away from and the influence of the condition such as probe slope to the testing result.
The technical scheme of the utility model as follows: a tubular product inner-penetrating array probe based on segmented orthogonal excitation comprises an orthogonal excitation part, a probe framework and a detection part;
the orthogonal excitation part comprises a cross magnetic core and a winding coil wound on the cross magnetic core;
the probe framework is of a hollow cylindrical structure, a circle of cross grooves are uniformly formed in the circumferential direction of the outer surface of the probe framework and used for placing a cross magnetic core, and the included angle between the long arm of the cross magnetic core and the circumferential direction of the pipe is 45 degrees; four small circular grooves are arranged in four quadrants of the cross-shaped magnetic core and used for placing the disc coil;
the detection part is a disc coil placed in four quadrants of the cross magnetic core; four disc coils in four quadrants of each cross magnetic core form a four-coil unit group;
in the defect detection process, different excitation and receiving modes are set for the four disc coils to realize different signal output combinations, different timing sequence designs are combined, different orientation defects are detected, and then the defects are qualitatively and positioned.
Furthermore, the probe is a segmented orthogonal excitation array eddy current probe.
Furthermore, the material of the wound coil and the disc coil is copper enameled wire.
Furthermore, the cross magnetic core is made of ferrite.
Further, disc coils arranged on the cross magnetic cores are numbered, the disc coil at the upper right corner of the first cross magnetic core is a, the disc coil at the lower right corner of the first cross magnetic core is b, the disc coil at the upper left corner of the first cross magnetic core is c, and the disc coil at the lower left corner of the first cross magnetic core is d; d is arranged at the upper right corner of the second cross-shaped magnetic core, e is arranged at the lower right corner, f is arranged at the upper left corner, and g is arranged at the lower left corner; and so on.
Further, the first signal output mode is that the orthogonal excitation part is used for excitation, the disc coil realizes sequential time-sharing reception by the multiplexing technology, and the signal receiving sequence of the disc coil is as follows: a → b → c → d → e → f → g → h → i → j → … …; the mode has better inspection effect on the gradual defect.
Further, a second signal output mode is that excitation of the disc coil is performed, and meanwhile, the disc coil 3 realizes time-sharing acquisition through a multiplexing technology, and a signal receiving sequence of the disc coil 3 is as follows: 1, a sending → b receiving; c send → d receive; 3, d send → e receive; f send → g receive; g send → h receive; i send → j receive … …; this mode has good detection effect on the defect parallel to the connection direction of the transmitting-receiving coil.
Furthermore, a third signal output mode is that the disc coil is excited, and meanwhile, the disc coil realizes time-sharing acquisition through a multiplexing technology, and the signal receiving sequence of the disc coil is as follows: 1, a send → c receive; b send → d receive; 3, d send → f receive; e send → g receive; g send → i receive; h send → j receive … …; this mode is complementary to the detection mode in the second signal output mode.
Further, a fourth signal output mode is that excitation is performed by an orthogonal excitation part, time-sharing acquisition is realized by a disc coil through a multiplexing technology, and a signal receiving sequence of the disc coil is as follows: 1. the output signal is: a. the sum of the signals d is different from the sum of the signals b and c; 2. the output signal is: d. the sum of the g signals is differenced with the sum of the e and f signals; 3. the output signal is: g. the sum of the j signals is differentiated from the sum of the h and i signals … …; the detection signal in the mode carries defect information and effectively reduces the interference of the external environment; the disturbance of the external environment comprises the disturbance of lift-off or probe inclination.
A wear array probe to carry out defect detecting's method in tubular product based on segmentation orthogonal excitation, including following step:
firstly, a steady-state sinusoidal excitation current is introduced into a wound coil, the steady-state sinusoidal excitation current can generate an alternating magnetic field, eddy currents can be induced in a tubular structure to be detected placed in the alternating magnetic field, the alternating eddy currents can induce a secondary magnetic field, a composite magnetic field formed by superposing the two magnetic fields can enable two ends of a disc coil to generate voltage signals, and the induced secondary magnetic field can generate corresponding changes under the influence of different defect forms in the tubular structure to be detected so as to generate different voltage signals;
and secondly, moving the probe framework along the axial direction of the pipe, carrying out different excitation and receiving modes on the four disc coils to realize different signal output combinations, detecting different orientation defects by combining different time sequence designs, and further carrying out qualitative and positioning on the defects.
The utility model discloses a show the effect and lie in: the utility model can simultaneously detect the circumferential defect and the axial defect of the pipe, adopts the oblique placement of the orthogonal coil and also detects the defects which are at different angles with the pipe; for conventional tubular structure eddy current inspection probe, the utility model discloses a reasonable detection chronogenesis setting can realize the defect of arbitrary direction, does to restrain to carry away from and the influence of the condition such as probe slope to the testing result.
Drawings
FIG. 1 is a schematic diagram of a conventional eddy current array probe coil arrangement;
FIG. 2 is a schematic diagram of a structure of an array probe excited in quadrature;
FIG. 3 is a schematic plan view of an array probe excited in quadrature;
FIG. 4 shows a core body and a wound coil in a quadrature excitation section;
FIG. 5 is a diagram illustrating the setting of the self-transmitting and self-receiving timing sequence of the disc coil under the orthogonal excitation;
FIG. 6 is a schematic diagram of a disk coil excitation and disk coil reception timing arrangement;
FIG. 7 is a schematic diagram of a disk coil excitation and disk coil reception timing arrangement;
FIG. 8 is a schematic diagram of the timing arrangement for quadrature excitation, differential detection of disc coil signals;
in the figure: the method comprises the following steps of 1-orthogonal excitation part, 2-probe framework, 3-disc coil, 4-four coil unit group, 5-cross magnetic core and 6-winding coil.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, wherein the array probe is based on a segmented orthogonal excitation.
As shown in fig. 1-4, a tubular product internal penetration array probe based on segmented orthogonal excitation comprises an orthogonal excitation part 1, a probe framework 2 and a detection part;
the orthogonal excitation part 1 comprises a cross magnetic core 5 and a winding coil 6 wound on the cross magnetic core 5;
the probe framework 2 is of a hollow cylindrical structure, a circle of cross grooves are uniformly formed in the circumferential direction of the outer surface of the probe framework and used for placing a cross magnetic core 5, and the included angle between the long arm of the cross magnetic core 5 and the circumferential direction of the pipe is 45 degrees; four small circular grooves are arranged in four quadrants of the cross-shaped magnetic core 5 and used for placing the disc coil 3;
the detection part is a disc coil 3 placed in four quadrants of a cross magnetic core 5; four disc coils 3 in four quadrants of each cross magnetic core 5 form a four-coil unit group 4;
in the defect detection process, different excitation and receiving modes are set for the four disc coils 3 to realize different signal output combinations, different timing sequence designs are combined, different orientation defects are detected, and further the defects are qualitatively and positioned.
Furthermore, the probe is a segmented orthogonal excitation array eddy current probe.
Furthermore, the material of the winding coil 6 and the material of the disc coil 3 are both copper enameled wires.
Furthermore, the cross-shaped magnetic core 5 is made of ferrite.
Further, disc coils 3 arranged on the cross magnetic cores 5 are numbered, the disc coil 3 at the upper right corner of the first cross magnetic core 5 is a, the disc coil at the lower right corner is b, the disc coil at the upper left corner is c, and the disc coil at the lower left corner is d; d is arranged at the upper right corner of the second cross-shaped magnetic core 5, e is arranged at the lower right corner, f is arranged at the upper left corner, and g is arranged at the lower left corner; and so on.
Further, as shown in fig. 5, the first signal output mode is that the orthogonal excitation part 1 is used for excitation, the disc coil 3 is used for sequential time division reception by the multiplexing technique, and the signal receiving sequence of the disc coil 3 is as follows: a → b → c → d → e → f → g → h → i → j → … …; the mode has better inspection effect on the slowly-varying defects;
further, as shown in fig. 6, a second signal output mode is that the disc coil 3 is excited, and the disc coil 3 realizes time-sharing acquisition by using a multiplexing technique, and a signal receiving sequence of the disc coil 3 is as follows: 1, a sending → b receiving; c send → d receive; 3, d send → e receive; f send → g receive; g send → h receive; i send → j receive … …; this mode has good detection effect on the defect parallel to the connection direction of the transmitting-receiving coil.
Further, as shown in fig. 7, a third signal output mode is to excite the disc coil 3, and the disc coil 3 realizes time-sharing acquisition by using a multiplexing technique, where a signal receiving sequence of the disc coil 3 is: 1, a send → c receive; b send → d receive; 3, d send → f receive; e send → g receive; g send → i receive; h send → j receive … …; this mode is complementary to the detection mode in the second signal output mode.
Further, as shown in fig. 8, a fourth signal output mode is that excitation is performed by the orthogonal excitation portion 1, time-sharing acquisition is realized by the disc coil 3 through a multiplexing technique, and a signal receiving sequence of the disc coil 3 is as follows: 1. the output signal is: a. the sum of the signals d is different from the sum of the signals b and c; 2. the output signal is: d. the sum of the g signals is differenced with the sum of the e and f signals; 3. the output signal is: g. the sum of the j signals is differentiated from the sum of the h and i signals … …; the detection signal in the mode carries defect information and effectively reduces the interference of the external environment; the disturbance of the external environment comprises the disturbance of lift-off or probe inclination.
A wear array probe to carry out defect detecting's method in tubular product based on segmentation orthogonal excitation, including following step:
firstly, a steady-state sinusoidal excitation current is introduced into a winding coil 6, the steady-state sinusoidal excitation current can generate an alternating magnetic field, eddy currents can be induced in a tubular structure to be detected placed in the alternating magnetic field, the alternating eddy currents can induce a secondary magnetic field, a composite magnetic field formed by superposing the two magnetic fields can enable two ends of a disc coil 3 to generate voltage signals, and the induced secondary magnetic field can generate corresponding changes under the influence of different defect forms in the tubular structure to be detected so as to generate different voltage signals;
and secondly, moving the probe framework 2 along the axial direction of the pipe, carrying out different excitation and receiving modes on the four disc coils 3 to realize different signal output combinations, detecting different orientation defects by combining different time sequence designs, and further carrying out qualitative and positioning on the defects.
Claims (4)
1. The utility model provides a wear array probe in tubular product based on segmentation orthogonal excitation which characterized in that: comprises an orthogonal excitation part (1), a probe framework (2) and a detection part;
the orthogonal excitation part (1) comprises a cross magnetic core (5) and a winding coil (6) wound on the cross magnetic core (5);
the probe framework (2) is of a hollow cylindrical structure, a circle of cross grooves are uniformly formed in the circumferential direction of the outer surface of the probe framework and used for placing a cross magnetic core (5), and the included angle between the long arm of the cross magnetic core (5) and the circumferential direction of the pipe is 45 degrees; four small circular grooves are arranged in four quadrants of the cross-shaped magnetic core (5) and used for placing the disc coil (3);
the detection part is a disc coil (3) placed in four quadrants of the cross magnetic core (5); four disc coils (3) in four quadrants of each cross magnetic core (5) form a four-coil unit group (4).
2. The tubular penetrating array probe based on segmented orthogonal excitation as claimed in claim 1, wherein: the probe is a segmented orthogonal excitation array eddy current probe.
3. The tubular penetrating array probe based on segmented orthogonal excitation as claimed in claim 1, wherein: the material of the winding coil (6) and the material of the disc coil (3) are copper enameled wires.
4. The tubular penetrating array probe based on segmented orthogonal excitation as claimed in claim 1, wherein: the cross magnetic core (5) is made of ferrite.
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| CN201822159135.9U CN209821125U (en) | 2018-12-21 | 2018-12-21 | Tubular product internal penetration array probe based on segmented orthogonal excitation |
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| CN201822159135.9U CN209821125U (en) | 2018-12-21 | 2018-12-21 | Tubular product internal penetration array probe based on segmented orthogonal excitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111351840A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Tubular product internal penetration array probe based on segmented orthogonal excitation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111351840A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Tubular product internal penetration array probe based on segmented orthogonal excitation |
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