Eddy current flaw detection device

Abstract

The utility model discloses an eddy current flaw detection device which comprises a device body, a fixing block and a detection end are arranged in the device body, the detection end is arranged at one end of the fixing block, a display screen is arranged on the surface of the fixing block, a magnetic attraction block is arranged at one end of the fixing block, and an electromagnetic assembly is arranged in the magnetic attraction block. A signal processing unit is arranged in the detection end, an open groove is formed in the surface of the detection end, and a probe is arranged in the open groove. According to the eddy current flaw detection device, the connecting wire is arranged at one end of the probe, flaw detection can be carried out on some farther objects, meanwhile, the magnetic attraction block is arranged to fix the device body on the surface of the detected object so as to carry out flaw detection on the detected object, displacement of the probe in the flaw detection process can be effectively avoided, and the flaw detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of eddy current flaw detection, in particular to an eddy current flaw detection device. Background Art

[0002] The eddy current flaw detector is a non-destructive testing device based on the principle of electromagnetic induction. It is mainly used to detect defects on the metal surface or near the surface. Its core working principle is that when an alternating current passes through a conductor, an alternating magnetic field is generated inside the conductor. This magnetic field interacts with the magnetic field on the conductor surface to form eddy currents. When there are defects on the conductor surface, the distribution of the eddy currents will change, thus affecting the detection signal.

[0003] Eddy current flaw detection devices usually consist of a high-frequency AC power supply, a probe, and a signal processing unit. The high-frequency AC power supply generates a high-frequency alternating magnetic field, and the probe introduces the magnetic field into the object being tested. The probe is generally composed of a coil and a magnetic core. The coil generates an alternating magnetic field, and the magnetic core introduces the magnetic field into the object being tested. The signal processing unit is responsible for receiving and processing the signal detected by the probe to determine whether there are defects on the surface of the conductor.

[0004] The existing eddy current flaw detection device has limitations when performing flaw detection. In order to ensure the accuracy of detection during flaw detection, the eddy current flaw detection probe needs to be aligned with the required inspection position of the object to be inspected and kept stable. However, the probe of the existing eddy current flaw detection device is generally connected to the eddy current flaw detector through a wire, and the steel pipe to be inspected is inspected by a handheld probe. It is difficult to keep the probe stable during the detection process, which easily affects the accuracy of detection. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an eddy current flaw detection device.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The utility model discloses an eddy current flaw detection device, comprising a device body, wherein the interior of the device body comprises a fixed block and a detection end, the detection end is arranged at one end of the fixed block, a display screen is arranged on the surface of the fixed block, a magnetic block is arranged at one end of the fixed block, an electromagnetic component is arranged inside the magnetic block, a signal processing unit is arranged inside the detection end, a groove is arranged on the surface of the detection end, and a probe is arranged inside the groove.

[0008] As a preferred technical solution of the utility model, an iron core, a coil and a power supply are arranged inside the magnetic attraction block, and the outer shell of the magnetic attraction block is a magnetic resistance layer, and the magnetic resistance layer is made of magnetic resistance material.

[0009] As a preferred technical solution of the utility model, the coil is arranged on the surface of the iron core, the two ends of the coil are respectively connected to the two ends of the power supply, the two ends of the power supply correspond to the positive and negative poles, and a power supply control component is arranged inside the power supply.

[0010] As a preferred technical solution of the utility model, a connecting wire is provided at one end of the probe, a wire storage bin is provided on the surface of the detection end, a connecting wire is provided inside the wire storage bin, a limiting ring is provided on the surface of the probe, the limiting ring is provided on the surface of the detection end, and the probe is electrically connected to the signal processing unit through the connecting wire.

[0011] As a preferred technical solution of the utility model, an isolation plate is provided at the connection between the fixed block and the detection end, the isolation plate is made of magnetic-resistance material, and a connection hole is opened on the surface of the isolation plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model discloses an eddy current flaw detection device, which can detect some distant objects by arranging a connecting line at one end of the probe, and at the same time, a magnetic suction block can be arranged to fix the device body on the surface of the object to be tested so as to detect the flaw, which can effectively avoid displacement of the probe during the flaw detection process and improve the accuracy of flaw detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a side view of the overall structure of the utility model;

[0017] Figure 3 It is a partial structural sectional view of the utility model;

[0018] In the figure: 1. device body; 2. display screen; 3. magnetic block; 301. iron core; 302. coil; 303. power supply; 304. magnetic resistance layer; 4. isolation plate; 5. probe; 501. connecting wire; 6. wire storage bin; 7. limit ring. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] In the drawings, the same reference numerals all refer to the same components.

[0021] like Figure 1-3 As shown, the utility model provides an eddy current flaw detection device, including a device body 1, the interior of the device body 1 includes a fixed block and a detection end, the detection end is arranged at one end of the fixed block, a display screen 2 is arranged on the surface of the fixed block, a magnetic block 3 is arranged at one end of the fixed block, an electromagnetic component is arranged inside the magnetic block 3, a signal processing unit is arranged inside the detection end, a groove is arranged on the surface of the detection end, and a probe 5 is arranged inside the groove.

[0022] Furthermore, an iron core 301, a coil 302 and a power supply 303 are arranged inside the magnetic block 3. The outer shell of the magnetic block 3 is a magnetic resistance layer 304, and the magnetic resistance layer 304 is made of magnetic resistance material. The coil 302 is arranged on the surface of the iron core 301, and the two ends of the coil 302 are respectively connected to the two ends of the power supply 303, and the two ends of the power supply 303 correspond to the positive and negative poles. A power supply control component is arranged inside the power supply 303, and the coil 302 is wound around the surface of the iron core 301. The interior of the magnetic block 3 is an electromagnet structure. According to the principle of electromagnet, when the power supply 303 supplies power to the coil 302, the iron core 301 acquires magnetism, and when the power supply 303 stops supplying power to the coil 302, the iron core 301 loses magnetism.

[0023] Furthermore, a connecting wire 501 is provided at one end of the probe 5, a wire storage bin 6 is provided on the surface of the detection end, a connecting wire 501 is provided inside the wire storage bin 6, a limiting ring 7 is provided on the surface of the probe 5, and the limiting ring 7 is provided on the surface of the detection end. The probe 5 is electrically connected to the signal processing unit through the connecting wire 501, and the probe 5 is used to introduce a magnetic field into the object to be measured. The probe 5 is generally composed of a coil 302 and a magnetic core, the coil 302 generates an alternating magnetic field, and the magnetic core introduces the magnetic field into the object to be measured. The signal processing unit is responsible for receiving and processing the signal detected by the probe 5, so as to determine whether there is a defect on the surface of the conductor. The setting of the connecting wire 501 can take the probe 5 out of the slot to detect some distant objects. Generally, the connecting wire 501 is stored inside the wire storage bin 6, and the staff can take the connecting wire 501 out of the wire storage bin 6 by dragging.

[0024] Furthermore, an isolation plate 4 is provided at the connection between the fixed block and the detection end. The isolation plate 4 is made of magnetically resistant material. A connection hole is provided on the surface of the isolation plate 4. The isolation plate 4 is provided to prevent the magnetic field inside the magnetic block 3 from affecting the probe 5.

[0025] The usage of the utility model is as follows:

[0026] When using the device body 1, there are two usage situations. When the object to be inspected is far away, the staff slides the probe 5 out of the slot by hand, pulls the connecting wire 501 out of the wire storage bin 6 by dragging, and then fixes the probe 5 on the surface of the object to be inspected. The probe 5 introduces the magnetic field into the object to be inspected, and the signal processing unit is responsible for receiving and processing the signal detected by the probe 5, so as to determine whether there are defects on the surface of the conductor; when the object to be inspected is close and the object is large in size, the user can turn on the power supply 303 to supply power to the coil 302 through the power supply control component. After obtaining power, the iron core 301 will obtain magnetism, and the magnetic block 3 will be attached to the surface of the object to be inspected and fixed by magnetic attraction, and then the probe 5 will be slid outward appropriately so that one end of it contacts the surface of the object to be inspected, and then the flaw detection will begin. This flaw detection method can effectively avoid the displacement of the probe 5 during the flaw detection process, thereby ensuring the accuracy of flaw detection.

[0027] The utility model is an eddy current flaw detection device. By arranging a connecting line 501 at one end of a probe 5, some distant objects can be detected. At the same time, a magnetic block 3 is arranged to fix the device body 1 on the surface of the object to be detected so as to detect the object. The displacement of the probe 5 during the detection process can be effectively avoided, thereby improving the accuracy of the detection.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An eddy current flaw detection device, characterized in that: The device comprises a device body (1), wherein the interior of the device body (1) comprises a fixed block and a detection end, wherein the detection end is arranged at one end of the fixed block, a display screen (2) is arranged on the surface of the fixed block, a magnetic block (3) is arranged at one end of the fixed block, an electromagnetic component is arranged inside the magnetic block (3), a signal processing unit is arranged inside the detection end, a groove is arranged on the surface of the detection end, and a probe (5) is arranged inside the groove.

2. The eddy current flaw detection device according to claim 1, characterized in that: An iron core (301), a coil (302) and a power source (303) are arranged inside the magnetic attraction block (3); the outer shell of the magnetic attraction block (3) is a magnetic resistance layer (304), and the magnetic resistance layer (304) is made of magnetic resistance material.

3. An eddy current flaw detection device according to claim 2, characterized in that: The coil (302) is arranged on the surface of the iron core (301), and the two ends of the coil (302) are respectively connected to the two ends of the power supply (303), the two ends of the power supply (303) correspond to positive and negative poles, and a power supply control component is arranged inside the power supply (303).

4. The eddy current flaw detection device according to claim 1, characterized in that: A connecting wire (501) is provided at one end of the probe (5), a wire storage bin (6) is provided on the surface of the detection end, a connecting wire (501) is provided inside the wire storage bin (6), a limiting ring (7) is provided on the surface of the probe (5), the limiting ring (7) is provided on the surface of the detection end, and the probe (5) is electrically connected to the signal processing unit via the connecting wire (501).

5. The eddy current flaw detection device according to claim 1, characterized in that: An isolation plate (4) is provided at the connection between the fixed block and the detection end, the isolation plate (4) is made of magnetic resistance material, and a connection hole is provided on the surface of the isolation plate (4).

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