A metal bar surface eddy current flaw detection device

Abstract

The utility model discloses a kind of metal bar surface eddy flaw detection devices, it includes device ontology, the device ontology includes outer tube and the motor of outer tube one side setting, vortex flaw detection detection component is arranged in the outer tube, vortex flaw detection detection component one side is provided with rotatable yellow plate, the coil unit is arranged at the one side of yellow plate, coil generates magnetic field when rotating, then signal is transmitted by the form of coupling, the one side of outer tube is provided with analysis instrument, and the signal for transmission is analyzed by analysis instrument.The utility model adopts rotating yellow plate coupling transmission flaw detection signal scheme, reaches the effect of reducing signal transmission noise, improving stability, accurately detecting metal bar defect.

Description

Technical Field

[0001] This utility model relates to the field of metal material flaw detection technology, and in particular to an eddy current flaw detection device for the surface of metal rods. Background Technology

[0002] In the field of metal processing and quality inspection, with the increasing demands for quality in industrial production, flaw detection technology for metal bars has become increasingly important. Accurate detection of surface defects in metal bars plays a crucial role in ensuring product quality and the safe operation of equipment. High-quality flaw detection can prevent subsequent processing problems and safety hazards during use caused by hidden defects such as cracks and porosity within the metal bars, and has undeniable value for the development of numerous industries, including aerospace and machinery manufacturing.

[0003] In the past, various techniques were commonly used for flaw detection of metal bars. A common method is to directly transmit the flaw detection signal via wire to the analysis instrument. This method is simple and direct, and can achieve the transmission and analysis of the flaw detection signal to a certain extent. Other methods utilize relatively stationary signal transmission components to transmit the flaw detection signal. These components have a relatively fixed structure, lack rotation capabilities, and simply transmit the received flaw detection signal to the analysis instrument.

[0004] However, existing flaw detection signal transmission methods have significant drawbacks. Direct transmission via wires and traditional decoupled transmission methods are susceptible to interference from external factors, resulting in high noise levels and unstable signals during transmission. This affects the accuracy of the analysis instruments in analyzing and judging the flaw detection signals, making it difficult to accurately detect minute defects that may exist on the surface of metal rods. Utility Model Content

[0005] This application provides an eddy current flaw detection device for the surface of metal bars, which adopts a rotating yellow plate coupling transmission scheme for flaw detection signals, thereby reducing signal transmission noise, improving stability, and accurately detecting defects in metal bars.

[0006] This application provides an eddy current flaw detection device for the surface of metal bars, which adopts the following technical solution: An eddy current flaw detection device for the surface of a metal bar includes a device body, which includes an outer cylinder and a motor disposed on one side of the outer cylinder. An eddy current flaw detection component is disposed inside the outer cylinder. A rotatable yellow plate is disposed on one side of the eddy current flaw detection component, and a coil unit is disposed on one side of the yellow plate. When rotated, the coil generates a magnetic field and then transmits a signal through coupling. An analytical instrument is disposed on one side of the outer cylinder, and the analytical instrument analyzes the transmitted signal.

[0007] By adopting the above technical solution, the present invention designs an eddy current flaw detection device for the surface of metal rods. In use, the device body includes an outer cylinder, a motor, an eddy current flaw detection component, a rotatable yellow plate, a coil unit, and an analytical instrument. It can use the eddy current flaw detection component to perform flaw detection on the surface of the metal rod. The rotatable yellow plate drives the coil unit to rotate and generate a magnetic field. The flaw detection signal is transmitted through coupling, which makes the signal transmission noise low and more stable. It can also use the analytical instrument to analyze the transmitted signal.

[0008] Preferably, a main shaft is provided inside the outer cylinder, the yellow plate is connected to the main shaft by screws, a through groove is provided at one end of the main shaft, and the eddy current flaw detection component is provided in the through groove at the end of the main shaft.

[0009] By adopting the above technical solution, the yellow plate is connected to the main shaft with screws during use, so that the yellow plate can rotate. When rotating, the coil can generate a magnetic field and transmit signals through coupling, with low noise and more stable signal transmission.

[0010] Preferably, a small pulley is provided at the end of the main shaft away from the eddy current flaw detection component, a support frame is provided on the side of the outer cylinder near the motor, the motor is fixed on the support frame, a large pulley is provided inside the support frame, the output shaft of the motor is connected to the center of the large pulley, and the large pulley and the small pulley are driven by a belt.

[0011] By adopting the above technical solution, when in use, a small pulley is set at the end of the main shaft away from the eddy current flaw detection component, and a support frame is set on the side of the outer cylinder near the motor. The motor is fixed on the support frame, and a large pulley is set inside the support frame. The output shaft of the motor is connected to the center of the large pulley. The large pulley and the small pulley are driven by a belt, which can drive the main shaft to rotate by the motor, thereby causing the yellow plate to rotate and generate a magnetic field to transmit signals in a coupled manner.

[0012] Preferably, the eddy current flaw detection assembly includes a probe housing disposed inside the outer cylinder and a probe inside the probe housing, wherein the probe housing is installed in the through groove of the main shaft.

[0013] By adopting the above technical solution, the device can use the probe to perform eddy current flaw detection on the metal rod inside the outer cylinder. The probe housing protects the probe, and the reasonable installation arrangement of the probe is achieved by installing the probe housing in the through groove of the main shaft, which facilitates flaw detection operation.

[0014] Preferably, a copper plate is provided between the coil units to prevent crosstalk between the coil units.

[0015] By adopting the above technical solution, placing copper plates between coil units during use can prevent crosstalk between coil units and ensure the accuracy of the detection signal.

[0016] Preferably, the outer cylinder is provided with a front guide sleeve and a rear guide sleeve, which are sleeved inside the main shaft. The front guide sleeve and the rear guide sleeve are provided with a plurality of guide sleeves, and the guide sleeves are provided with a space for the metal rod to pass through. The ends of the front guide sleeve and the rear guide sleeve are respectively fixed to the front end cover and the rear end cover of the outer cylinder.

[0017] By adopting the above technical solution, when in use, a front guide sleeve and a rear guide sleeve are installed inside the outer cylinder and fitted inside the main shaft. There are multiple guide sleeves with space inside the sleeve. The ends of the sleeves are fixed to the front and rear end caps of the outer cylinder, which can guide the metal rod to pass through the device accurately and ensure that the flaw detection is carried out smoothly.

[0018] Preferably, a guide wheel assembly is provided on one side of both the front end cover and the rear end cover, and the guide wheel assembly is used to guide the metal rod to be processed into and out.

[0019] By adopting the above technical solution, when in use, the guide wheel assembly on one side of the front cover and the rear cover can guide the metal rod to be processed into and out of the device.

[0020] Preferably, a base is provided on one side of the outer cylinder, and the base is used to fix the outer cylinder in the processing area.

[0021] By adopting the above technical solution, the base can stably fix and support the outer cylinder during use.

[0022] In summary, this application has the following beneficial effects: 1. This utility model relates to an eddy current flaw detection device for the surface of metal rods. By using a probe to perform eddy current flaw detection on the metal rods, it can detect possible defects on the surface of the metal rods, ensuring product quality and safe operation of equipment. 2. The eddy current flaw detection device for the surface of metal rods designed in this utility model generates a magnetic field when the yellow plate rotates, and transmits the signal through coupling. It has low noise and more stable signal transmission, which is conducive to the accurate analysis and judgment of the flaw detection signal by the analysis instrument. 3. The eddy current flaw detection device for the surface of metal rods designed in this utility model has copper plates placed between the coil units to prevent crosstalk between the coil units. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a cross-sectional view of an embodiment; Figure 3This is a schematic diagram of the internal structure in the embodiment; Explanation of reference numerals in the attached drawings: 1. Device body; 2. Outer cylinder; 3. Motor; 4. Eddy current flaw detection assembly; 41. Probe housing; 42. Probe; 5. Yellow plate; 6. Coil unit; 7. Analytical instrument; 8. Main shaft; 9. Through slot; 10. Small pulley; 11. Support frame; 12. Large pulley; 13. Copper plate; 14. Front guide sleeve; 15. Rear guide sleeve; 16. Front end cover; 17. Rear end cover; 18. Guide wheel assembly; 19. Base. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] This utility model discloses an eddy current flaw detection device for the surface of metal bars, such as Figures 1 to 3 As shown, the device includes a main body 1, which comprises an outer cylinder 2, a motor 3, an eddy current flaw detection component 4, a rotatable yellow plate 5, a coil unit 6, and an analytical instrument 7. The motor 3 is located on one side of the outer cylinder 2, the eddy current flaw detection component 4 is located inside the outer cylinder 2, the yellow plate 5 is located on one side of the eddy current flaw detection component 4, the coil unit 6 is located on one side of the yellow plate 5, and the analytical instrument 7 is located on one side of the outer cylinder 2. This layout allows the device to effectively perform eddy current flaw detection on the surface of metal rods. By rotating the yellow plate 5, the coil generates a magnetic field, transmitting the flaw detection signal in a coupled manner. Compared to traditional methods, this reduces external interference, lowers noise, and makes signal transmission more stable, allowing the analytical instrument 7 to analyze the signal more accurately and detect minute defects on the surface of the metal rod. Furthermore, the outer cylinder 2 also has multiple bearings and a coil fixing disc for stably mounting the coil and other structures inside the outer cylinder 2 without affecting signal transmission.

[0026] Specifically, the outer cylinder 2 is the main load-bearing structure of the entire device, and it is generally made of high-strength metal materials, such as stainless steel, to ensure the overall structural strength and stability of the device. The outer cylinder 2 can be a cylindrical structure to facilitate the installation and layout of internal components. A main shaft 8 is installed inside the outer cylinder 2. The main shaft 8 is usually a cylindrical metal rod that serves to support and transmit power. The yellow plate 5 is connected to the main shaft 8 by screws. One end of the main shaft 8 has a through groove 9, which is used to install the eddy current testing component 4. The shape of the through groove 9 must be compatible with the eddy current testing component 4.

[0027] The eddy current testing assembly 4 includes a probe 42, a housing 41, and the probe 42 itself. The housing 41 is typically made of plastic or metal. Plastic offers advantages such as light weight and low cost, while metal provides better protection. The housing 41 is installed within the through slot 9 of the spindle 8 and secured by bolts or clips. The probe 42 is the core component of the eddy current testing assembly; it emits and receives eddy current signals to detect defects on the surface of the metal rod.

[0028] A small pulley 10 is located at the end of the main shaft 8 furthest from the eddy current testing component 4. The small pulley 10 is typically made of cast iron or aluminum alloy and is fixed to the main shaft 8 via a key connection to ensure effective power transmission. A support frame 11 is located on the side of the outer cylinder 2 closest to the motor 3. The support frame 11 is usually welded from angle steel or channel steel, providing high strength and stability. The motor 3 is fixed to the support frame 11. The motor 3 is typically an AC asynchronous motor, which offers advantages such as simple structure, reliable operation, and convenient maintenance. A large pulley 12 is located inside the support frame 11. The output shaft of the motor 3 is connected to the center of the large pulley 12. The large pulley 12 and the small pulley 10 are driven by a belt, typically a V-belt, which offers advantages such as high transmission efficiency and low noise.

[0029] A copper plate 13 is provided between coil units 6. The copper plate 13 is generally made of pure copper, which has good conductivity and shielding performance. The function of the copper plate 13 is to prevent crosstalk between coil units 6, ensuring the accuracy of signal transmission. A front guide sleeve 14 and a rear guide sleeve 15 are provided inside the outer cylinder 2. The front guide sleeve 14 and the rear guide sleeve 15 are fitted inside the main shaft 8. They are usually made of plastic or metal and serve to guide and protect the metal rod. Multiple guide sleeves are provided inside the front guide sleeve 14 and the rear guide sleeve 15. The guide sleeves are generally made of wear-resistant engineering plastic and have space for the metal rod to pass through, ensuring smooth passage. The ends of the front guide sleeve 14 and the rear guide sleeve 15 are respectively fixed to the front end cover 16 and the rear end cover 17 of the outer cylinder 2, connected by bolts or other means to ensure structural stability.

[0030] Guide wheel assemblies 18 are provided on one side of both the front cover 16 and the rear cover 17. Each guide wheel assembly 18 typically consists of guide wheels and a support. The guide wheels are usually made of rubber or polyurethane, providing good elasticity and wear resistance. The guide wheel assembly 18 guides the metal rod to be processed into and out, ensuring smooth operation of the metal rod during the testing process. A base 19 is provided on one side of the outer cylinder 2. The base 19 is typically made of cast iron or welded steel plate and is used to fix the outer cylinder 2 in the processing area, ensuring the stability of the device.

[0031] Working Principle: This eddy current flaw detection device for metal rod surfaces integrates its various components through a rational structural layout. Motor 3 drives the main shaft 8 to rotate via belt drive, which in turn rotates the yellow plate 5. The coil on the yellow plate 5 generates a magnetic field, which, through coupling, stably transmits the flaw detection signal detected by the eddy current flaw detection component 4 to the analysis instrument 7. Simultaneously, the copper plate 13 avoids signal interference between coil units 6, and the front guide sleeve 14, rear guide sleeve 15, and guide wheel assembly 18 ensure the smooth operation of the metal rod. The entire device effectively reduces noise during signal transmission and improves signal transmission stability. Compared to existing technologies, it can more accurately detect minute defects on the surface of metal rods, demonstrating strong practicality and innovation.

[0032] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An eddy current flaw detection device for the surface of a metal bar, characterized in that: The device includes a main body (1), which includes an outer cylinder (2) and a motor (3) disposed on one side of the outer cylinder (2). An eddy current flaw detection component (4) is disposed inside the outer cylinder (2). A rotatable yellow plate (5) is disposed on one side of the eddy current flaw detection component (4). A coil unit (6) is disposed on one side of the yellow plate (5). When the coil rotates, it generates a magnetic field and then transmits the signal through coupling. An analytical instrument (7) is disposed on one side of the outer cylinder (2). The analytical instrument (7) analyzes the transmitted signal.

2. The eddy current flaw detection device for the surface of a metal bar according to claim 1, characterized in that: The outer cylinder (2) is provided with a main shaft (8), the yellow plate (5) is connected to the main shaft (8) by screws, one end of the main shaft (8) is provided with a through groove (9), and the eddy current flaw detection component (4) is provided in the through groove (9) at the end of the main shaft (8).

3. The eddy current flaw detection device for the surface of a metal rod according to claim 2, characterized in that: A small pulley (10) is provided at the end of the main shaft (8) away from the eddy current flaw detection component (4). A support frame (11) is provided on the side of the outer cylinder (2) near the motor (3). The motor (3) is fixed on the support frame (11). A large pulley (12) is provided inside the support frame (11). The output shaft of the motor (3) is connected to the center of the large pulley (12). The large pulley (12) and the small pulley (10) are driven by a belt.

4. The eddy current flaw detection device for the surface of a metal bar according to claim 1, characterized in that: The eddy current flaw detection assembly (4) includes a probe (42) housing (41) disposed inside the outer cylinder (2) and a probe (42) inside the probe (42) housing (41). The probe (42) housing (41) is installed in the through groove (9) of the main shaft (8).

5. The eddy current flaw detection device for the surface of a metal rod according to claim 1, characterized in that: A copper plate (13) is provided between the coil units (6) and the copper plate (13) is used to prevent crosstalk between the coil units (6) and the coil units (6).

6. The eddy current flaw detection device for the surface of a metal bar according to claim 1, characterized in that: The outer cylinder (2) is provided with a front guide sleeve (14) and a rear guide sleeve (15). The front guide sleeve (14) and the rear guide sleeve (15) are sleeved in the main shaft (8). The front guide sleeve (14) and the rear guide sleeve (15) are provided with multiple guide sleeves. The guide sleeves are provided with spaces for metal rods to pass through. The ends of the front guide sleeve (14) and the rear guide sleeve (15) are respectively fixed to the front end cover (16) and the rear end cover (17) of the outer cylinder (2).

7. The eddy current flaw detection device for the surface of a metal bar according to claim 6, characterized in that: A guide wheel assembly (18) is provided on one side of both the front end cover (16) and the rear end cover (17), and the guide wheel assembly (18) is used to guide the metal rod to be processed into and out.

8. The eddy current flaw detection device for the surface of a metal bar according to claim 1, characterized in that: A base (19) is provided on one side of the outer cylinder (2), and the base (19) is used to fix the outer cylinder (2) in the processing area.

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