Magnetic flux leakage detection system for carbon fiber core wire

Abstract

The utility model discloses a magnetic flux leakage detection system for a carbon fiber core wire. The magnetic flux leakage detection system comprises a clamp and a magnetic flux leakage detection device, the clamp is provided with an adjustable assembly used for clamping carbon fiber core wires of different specifications. The magnetic flux leakage detection device comprises a detector and a position recording wheel; the detector comprises a magnetization assembly and a magnetic sensitive element; the magnetizing assembly is provided with a sliding channel for placing the clamp; the magnetization assembly is used for exciting a leakage magnetic field at the defect position of the carbon fiber core wire; the magneto-sensitive element is used for capturing leakage magnetic field information of the carbon fiber core wire. According to the utility model, the carbon fiber core wire is stably clamped by the clamp so as to reduce the interference to a magnetic flux leakage detection signal; the carbon fiber core wire is magnetized through the magnetization assembly, so that the leakage magnetic field of the defect position of the carbon fiber core wire is excited, the position recording wheel records the specific position information of the magnetic flux leakage signal while the magnetic sensitive element captures the information of the leakage magnetic field, and then the accuracy and the sensitivity of the magnetic flux leakage detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection systems, in particular to a magnetic flux leakage detection system for carbon fiber core conductors. Background Art

[0002] Carbon fiber core conductors, a new type of low-carbon and environmentally friendly conductor, are commonly used in transmission line capacity expansion and retrofitting. However, in practice, carbon fiber core conductors are prone to failures at the crimping joints (i.e., conductor connectors), impacting the safe operation of power systems. Magnetic flux leakage (MFL) testing is currently commonly used to troubleshoot these crimping failures, but existing MFL detection systems provide poor results. Utility Model Content

[0003] The utility model provides a magnetic flux leakage detection system for a carbon fiber core conductor, which is used to solve the technical problem that the existing magnetic flux leakage detection system has poor detection results when performing magnetic flux leakage detection.

[0004] The utility model provides a magnetic flux leakage detection system for carbon fiber core conductors, comprising: a clamp and a magnetic flux leakage detection device;

[0005] The clamp is provided with an adjustable component for clamping carbon fiber core conductors of different specifications;

[0006] The magnetic flux leakage detection device includes a detector and a register wheel; the register wheel is fixedly connected to one side of the detector;

[0007] The detector includes a magnetization component and a magnetic sensitive element;

[0008] The magnetization assembly is provided with a sliding channel for accommodating a fixture holding a carbon fiber core conductor;

[0009] The magnetization component is used to excite leakage magnetic field at defective positions of the carbon fiber core conductor;

[0010] The magnetic sensitive element is installed in the middle of the magnetization assembly to capture the leakage magnetic field information of the carbon fiber core conductor and generate a defect signal by induction;

[0011] The marking wheel is used to generate position information of the leakage magnetic field signal on the carbon fiber core conductor when the detector detects the leakage magnetic field signal of the carbon fiber core conductor.

[0012] In a specific embodiment, the magnetization assembly is composed of an armature and permanent magnets located on both sides of the armature;

[0013] A shoe slot is provided in the middle of the armature for assembling the magnetic sensitive element.

[0014] In a specific embodiment, each of the permanent magnets is plugged with a centering bushing for the clamp to pass through, so that the clamp is located in the center of the sliding channel.

[0015] In a specific embodiment, the register wheel has a built-in grating encoder.

[0016] In a specific embodiment, the clamp includes a clamp male buckle housing and a clamp female buckle housing that are detachably connected.

[0017] In a specific embodiment, the adjustable assembly includes an adjustable buckle strap and an adjustable bayonet ring;

[0018] The adjustable buckle strips are provided on both sides of the inner wall of the clamp male buckle shell, and the adjustable bayonet rings for the adjustable buckle strips to pass through are opened on both sides of the clamp female buckle shell.

[0019] In a specific embodiment, the adjustable buckle strip is composed of a plurality of unidirectional gentle raised adjustment strips;

[0020] The adjustable bayonet ring is provided with a plurality of bayonet holes extending downwardly along the inner wall of the clamp female buckle housing;

[0021] Any of the raised adjustment bands is engaged with any of the bayonet sockets to adjust the position of the carbon fiber core wire in the accommodating space so as to fix the carbon fiber core wire.

[0022] In a specific embodiment, the thickness of the outer shell of the clamp is specifically 14.6 mm, and the cross-sectional area of ​​the core rod of the carbon fiber core wire ranges from 30 mm to 40 mm. 2 ~50mm 2 .

[0023] In a specific embodiment, the pole gap between the permanent magnets of the magnetization assembly ranges from 53 mm to 55 mm.

[0024] In a specific embodiment, the width of the probe shoe groove is specifically in the range of 9 to 12 mm, and the depth of the probe shoe groove is specifically in the range of 5 to 8 mm.

[0025] It can be seen from the above technical solutions that the present invention has the following advantages:

[0026] The utility model provides a magnetic flux leakage detection system for carbon fiber core conductors, comprising: a clamp and a magnetic flux leakage detection device; the clamp is provided with an adjustable component for clamping carbon fiber core conductors of different specifications; the magnetic flux leakage detection device comprises a detector and a register wheel; the register wheel is fixedly connected to one side of the detector; the detector comprises a magnetizing component and a magnetic sensitive element; the magnetizing component is provided with a sliding channel for accommodating the clamp holding the carbon fiber core conductor; the magnetizing component is used to excite a leakage magnetic field at a defect position of the carbon fiber core conductor; a magnetic sensitive element is installed in the middle of the magnetizing component for capturing leakage magnetic field information of the carbon fiber core conductor and generating a defect signal by induction; the register wheel is used to generate position information of the leakage magnetic field signal on the carbon fiber core conductor when the detector detects the leakage magnetic field signal of the carbon fiber core conductor.

[0027] In the utility model, the carbon fiber core conductor is stably clamped by a clamp to ensure that the carbon fiber core conductors of different specifications will not move or deform during the detection process, thereby reducing interference with the leakage magnetic field detection signal; the carbon fiber core conductor is magnetized by a magnetizing component to stimulate the leakage magnetic field at the defect position of the carbon fiber core conductor, and the leakage magnetic field information is captured by the magnetic sensitive element while the register wheel records the specific position information of the leakage magnetic field signal, thereby improving the accuracy and sensitivity of the leakage magnetic field detection, thereby solving the technical problem of poor detection results of the existing leakage magnetic field detection system when performing leakage magnetic field detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic cross-sectional view of the structure of the magnetic flux leakage detection system provided in this application;

[0030] Figure 2 A schematic cross-sectional view of the structure of the detector provided in this application;

[0031] Figure 3 A schematic cross-sectional view of the male buckle housing of the clamp provided in this application;

[0032] Figure 4 This is a schematic cross-sectional view of the structure of the clamp female buckle housing of the clamp provided in this application;

[0033] Figure 5 A schematic diagram of the excitation structure parameters of the detector provided in this application;

[0034] Among them, the figures are marked as: clamp 1, snap ring 2, adjustable component 3, adjustable buckle strip 4, adjustable bayonet ring 5, male buckle 6, female buckle 7, leakage magnetic detection device 8, detector 9, armature 10, permanent magnet 11, magnetic sensitive element 12, probe shoe groove 13 and centering bushing 14. DETAILED DESCRIPTION

[0035] The embodiment of the utility model provides a magnetic flux leakage detection system for carbon fiber core conductors, which is used to solve the technical problem that the existing magnetic flux leakage detection system has poor detection results when performing magnetic flux leakage detection.

[0036] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0039] See also Figure 1 and Figure 2 , the present application provides a magnetic flux leakage detection system for carbon fiber core conductor, comprising: a fixture 1, a magnetic flux leakage detection device 8 and a display device;

[0040] The clamp 1 is provided with an adjustable component 3 for clamping carbon fiber core conductors of different specifications;

[0041] The magnetic flux leakage detection device 8 includes a detector 9 and a register wheel; the register wheel is fixedly connected to one side of the detector 9;

[0042] The detector 9 includes a magnetizing assembly and a magnetic sensitive element 12; the magnetizing assembly has a sliding channel for placing a fixture 1 holding a carbon fiber core conductor; the magnetizing assembly is used to excite a leakage magnetic field at the defect location of the carbon fiber core conductor; the magnetic sensitive element 12 is installed in the middle of the magnetizing assembly for capturing the leakage magnetic field information of the carbon fiber core conductor and generating a defect signal by induction;

[0043] The marking wheel is used to generate the position information of the defect signal in the carbon fiber core conductor when the detector 9 detects the magnetic flux leakage signal of the carbon fiber core conductor;

[0044] The magnetic flux leakage detection device 8 is connected to the display device through a signal line; the display device is used to display the detection signal and position information of the carbon fiber core conductor.

[0045] It should be noted that fixture 1 can stably clamp the carbon fiber-core conductor, ensuring that carbon fiber-core conductors of different specifications do not move or deform during the detection process, thereby reducing interference with the magnetic flux leakage detection signal. In magnetic flux leakage detection device 8, the magnetization assembly ensures that the carbon fiber-core conductor is uniformly and sufficiently magnetized, improving the sensitivity and reliability of defect detection. At the same time, the magnetic sensor 12 is installed in the center of the magnetization assembly to directly capture the leakage magnetic field information of the carbon fiber-core conductor. The position information of the defect signal generated by the marking wheel on the carbon fiber-core conductor facilitates subsequent repair or further evaluation and analysis of the defect location of the carbon fiber-core conductor.

[0046] In addition, the detector 9 and the register wheel are integrated, which simplifies the structure of the entire detection system, reduces the preparation work before detection, shortens the detection time, and improves the stability and reliability of the detection system; wherein, the magnetic sensitive element 12 mainly includes an inductor coil and a Hall sensor.

[0047] In actual testing, the carbon fiber core conductor is first clamped by the fixture 1, and then the fixture 1 is placed in the sliding channel of the leakage magnetic flux detection device 8. The sliding leakage magnetic flux detection device 8 magnetizes the carbon fiber core conductor through the magnetization component and excites the leakage magnetic field at the defect position of the carbon fiber core conductor. The leakage magnetic field information of the carbon fiber core conductor is captured by the magnetic sensitive element 12, and a defect signal is generated by induction. At the same time, the register wheel records the specific position information of the leakage magnetic flux signal detected on the carbon fiber core conductor. The defect signal and position information of the carbon fiber core conductor are analyzed by the display device, and the nature of the defect signal is determined to facilitate maintenance by operation and maintenance personnel, thereby completing the test.

[0048] The magnetic flux leakage detection system provided by the utility model improves the accuracy, efficiency and operational convenience of magnetic flux leakage detection through the characteristics of integrated design, real-time detection and high-sensitivity detection, while also enhancing the adaptability of the system. It has broad application prospects in defect detection of carbon fiber core conductors of different specifications.

[0049] In a specific embodiment, see Figure 2 The magnetization assembly is composed of an armature 10 and permanent magnets 11 located on both sides of the armature 10; a shoe slot 13 is opened in the middle of the armature 10 for assembling a magnetic sensitive element 12.

[0050] It should be noted that the magnetization assembly employs a dual-circuit structure. The combination of the armature 10 and permanent magnets 11 generates a strong magnetic field to magnetize the carbon fiber core conductor. Four permanent magnets 11 are identical in structure. A probe shoe slot 13 is dug in the center of the armature 10, and the magnetic sensor 12 is placed inside the slot. This allows for better magnetic flux leakage signals and protects the magnetic sensor 12 from damage caused by collisions with other components.

[0051] In a specific embodiment, each permanent magnet 11 is plugged with a centering bushing 14 for the clamp 1 to pass through, so that the clamp 1 is located in the center position of the sliding channel, thereby maintaining the stability and consistency of the carbon fiber core wire located in the clamp 1, reducing the offset and vibration that occurs during leakage magnetic detection, and thus improving the reliability of leakage magnetic detection.

[0052] In a specific embodiment, the register wheel has a built-in grating encoder.

[0053] It can be understood that when performing magnetic flux leakage detection on the carbon fiber core conductor, the roller at the bottom of the register wheel contacts the clamp 1, and the register wheel can drive the encoding shaft of the grating encoder to rotate by rolling the roller, thereby generating displacement pulse data to achieve the positioning of the defect signal at the crimping point of the carbon fiber core conductor.

[0054] In a specific embodiment, see Figure 3 and Figure 4 The fixture 1 includes a detachably connected male and female clamp buckle housings, making the fixture 1 easier to install and remove and portable, thereby improving inspection efficiency and ease of operation. The male and female clamp buckle housings have the same radius and length.

[0055] In a specific embodiment, the adjustable component 3 includes an adjustable buckle strip 4 and an adjustable bayonet ring 5; the adjustable buckle strip 4 is provided on both sides of the inner wall of the male buckle shell of the clamp, and the adjustable bayonet ring 5 is provided on both sides of the female buckle shell of the clamp for the adjustable buckle strip 4 to pass through.

[0056] In actual application, the carbon fiber core conductor is fixedly set on the transmission line tower. In order to adapt to the carbon fiber core conductors of different specifications and sizes, the utility model is provided with an adjustable snap strip 4 and an adjustable bayonet ring 5. The clamping position of the adjustable snap strip 4 and the adjustable bayonet ring 5 is adjusted to dynamically adjust the inner diameter space of the clamp 1, so that the adjustable snap strip 4 fits the outer periphery of the carbon fiber core conductors of different specifications and sizes to match the carbon fiber core conductors of different specifications and sizes, and further realizes the fixed connection between the carbon fiber core conductors of different specifications and sizes and the clamp 1, avoids the movement of the clamp 1 during the leakage magnetic detection, improves the stability of the clamp 1, and avoids the clamp 1 affecting the detection results of the leakage magnetic detection.

[0057] In a specific embodiment, the adjustable buckle strip 4 is composed of a plurality of unidirectional smooth raised adjustment bands; the adjustable bayonet ring 5 is provided with a plurality of bayonet holes extending downward along the inner wall of the clamp female buckle shell; any raised adjustment band and any bayonet hole are engaged to adjust the position of the carbon fiber core conductor in the accommodating space to fix the carbon fiber core conductor.

[0058] It can be understood that each raised adjustment band corresponds to the specification size of a carbon fiber core wire. Therefore, adjusting the clamping position of the raised adjustment band and the bayonet plays a role in adjusting the position of the carbon fiber core wire in the accommodating space. At the same time, it can also fix the carbon fiber core wire, that is, realize the fixed connection between the carbon fiber core wire and the clamp 1, improve the stability of the clamp 1, and at the same time improve the practicality of the clamp 1.

[0059] In a specific embodiment, the thickness of the outer shell of the fixture 1 is specifically 14.6 mm, and the cross-sectional area of ​​the core rod of the carbon fiber core conductor ranges from 30 mm to 40 mm. 2 ~50mm 2 .

[0060] It is understandable that during the crimping process of the carbon fiber core conductor, due to the crimping connection structure formed by the non-integrated molding, the crimping point is prone to generate stainless steel signals, which interferes with the results of the leakage magnetic flux detection. The outer shell thickness of the clamp 1 can meet the purpose of increasing the lift-off value, that is, increasing the distance between the leakage magnetic flux detection device 8 and the magnetic film of the carbon fiber core conductor. In this embodiment, the outer shell thickness of the clamp 1 can be designed to be 14.6mm, so that the magnetic film of the carbon fiber core conductor and the leakage magnetic flux detection device 8 are maintained at an optimal distance, thereby suppressing the influence of interference signals on the leakage magnetic flux detection, highlighting the defect signal of the carbon fiber core conductor, and improving the detection accuracy of the leakage magnetic flux detection defect identification.

[0061] At the same time, under this thickness, the fixture 1 is suitable for the cross-sectional area of ​​the core rod within the range of 30mm 2 ~50mm 2 Carbon fiber core conductor, especially suitable for core rod cross-section area of ​​35mm 2, 40mm 2 and 45mm 2 These three commonly used carbon fiber core conductors.

[0062] See also Figure 5 In a specific embodiment, in actual application, the size of the armature 10 cannot be too large. At the same time, if the pole gap between the permanent magnets 11 is appropriately increased, the negative impact of the speed of the leakage magnetic field detection device 8 when sliding during the leakage magnetic field detection can be weakened. Therefore, the pole gap range L between the permanent magnets 11 on the left and right sides of the magnetization assembly can be designed to be 53mm~55mm; in order to prevent the leakage magnetic field detection device 8 from colliding with the clamp 1 during movement, the radial air gap M of the magnetization assembly can be designed to be in the range of 3~3.5mm. At the same time, within this parameter range, the magnetic film of the carbon fiber core conductor can be in a magnetic saturation or near-saturation state.

[0063] See also Figure 5 In a specific embodiment, the shoe slot 13, a structural component in which the magnetic sensor 12 is housed in the magnetic flux leakage detection device 8, has a size that affects the accuracy of magnetic flux leakage detection. In practice, the shoe slot 13 is designed with a width d ranging from 9 to 12 mm and a depth h ranging from 5 to 8 mm to ensure that the magnetic sensor 12 receives a uniform and sufficient magnetic field signal, thereby improving the accuracy of magnetic flux leakage detection.

[0064] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic flux leakage detection system for carbon fiber core conductors, characterized in that: include: Fixtures and magnetic flux leakage detection devices; The clamp is provided with an adjustable component for clamping carbon fiber core conductors of different specifications; The magnetic flux leakage detection device includes a detector and a register wheel; the register wheel is fixedly connected to one side of the detector; The detector includes a magnetization component and a magnetic sensitive element; The magnetization assembly is provided with a sliding channel for accommodating a fixture holding a carbon fiber core conductor; The magnetization component is used to excite leakage magnetic field at defective positions of the carbon fiber core conductor; The magnetic sensitive element is installed in the middle of the magnetization assembly to capture the leakage magnetic field information of the carbon fiber core conductor and generate a defect signal by induction; The marking wheel is used to generate position information of the leakage magnetic field signal on the carbon fiber core conductor when the detector detects the leakage magnetic field signal of the carbon fiber core conductor.

2. The magnetic flux leakage detection system according to claim 1, characterized in that: The magnetization assembly is composed of an armature and permanent magnets located on both sides of the armature; A shoe slot is provided in the middle of the armature for assembling the magnetic sensitive element.

3. The magnetic flux leakage detection system according to claim 2, characterized in that: Each of the permanent magnets is plugged with a centering bushing for the clamp to pass through, so that the clamp is located in the center of the sliding channel.

4. The magnetic flux leakage detection system according to claim 1, characterized in that: The register wheel is equipped with a built-in grating encoder.

5. The magnetic flux leakage detection system according to claim 1, characterized in that: The clamp comprises a clamp male buckle housing and a clamp female buckle housing which are detachably connected.

6. The magnetic flux leakage detection system according to claim 5, characterized in that: The adjustable assembly includes an adjustable buckle strip and an adjustable bayonet ring; The adjustable buckle strips are provided on both sides of the inner wall of the clamp male buckle shell, and the adjustable bayonet rings for the adjustable buckle strips to pass through are opened on both sides of the clamp female buckle shell.

7. The magnetic flux leakage detection system according to claim 6, characterized in that: The adjustable buckle strip is composed of a plurality of unidirectional gentle raised adjustment strips; The adjustable bayonet ring is provided with a plurality of bayonet holes extending downwardly along the inner wall of the clamp female buckle housing; Any of the raised adjustment bands is engaged with any of the bayonet sockets to adjust the position of the carbon fiber core wire in the accommodating space so as to fix the carbon fiber core wire.

8. The magnetic flux leakage detection system according to claim 1, characterized in that: The outer shell thickness of the fixture is specifically 14.6 mm, and the cross-sectional area of ​​the core rod of the carbon fiber core conductor ranges from 30 mm to 40 mm. 2 ~50mm 2 .

9. The magnetic flux leakage detection system according to claim 2, characterized in that: The pole gap between the permanent magnets of the magnetization assembly specifically ranges from 53 mm to 55 mm.

10. The magnetic flux leakage detection system according to claim 2, characterized in that: The width of the shoe probe groove is specifically in the range of 9 to 12 mm, and the depth of the shoe probe groove is specifically in the range of 5 to 8 mm.

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