A magnetic particle detector capable of detecting without removing the paint layer

Abstract

The present invention relates to the technical field of nondestructive testing equipment, and in particular to a detector capable of testing without removing a paint layer, comprising a power box, a detection host and a yoke assembly, wherein the detection host comprises a hand-held bracket, connection blocks symmetrically arranged on both sides of the hand-held bracket and two telescopic rods rotatably spliced ​​on the connection blocks, a fixed block is installed at the end of the telescopic rod, and the yoke assembly is fixedly installed at the bottom of the fixed block; the two telescopic rods are rotatably connected to each connection block of the present invention, and each group of yoke assemblies is connected to the end of each telescopic rod through a fixed block, so that when the detection host performs flaw detection on the surface of an object, each group of yoke assemblies can be extended and expanded through each telescopic rod, so that the detected surface can be surrounded by multiple yoke assemblies, and the magnetic field strength during the detection of the workpiece surface can be enhanced, so that the function of flaw detection without removing the paint surface is realized, the detection steps are simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing equipment, and in particular to a testing instrument capable of testing without removing a paint layer. Background Art

[0002] Magnetic particle inspection is a commonly used non-destructive testing method. By applying a magnetic field to the surface of the object being inspected and spreading magnetic powder on it, the magnetic defects and cracks produced by the magnetic powder on the surface can be observed to determine whether the object being inspected has defects. Traditional magnetic particle flaw detectors require the surface paint layer of the object being inspected to be removed before magnetic particle inspection can be performed, which increases the complexity and time cost of the work and causes certain damage to the object being inspected. Therefore, it is urgent to develop a magnetic particle detector that can perform inspection without removing the paint layer. Summary of the invention

[0003] In order to solve the problems in the above-mentioned background technology, the present invention provides a magnetic particle detector that can detect without removing the paint layer. It can perform flaw detection on the surface of the object to be tested without removing the paint surface, which simplifies the detection steps and improves the detection efficiency. At the same time, it can also be applied to the surfaces of various objects and has a wide range of applications.

[0004] The solution adopted by the present invention to solve its technical problem is: a magnetic particle detector that can detect without removing the paint layer, including a power box, a detection host electrically connected to the power box, and a yoke assembly arranged on the detection host, the detection host includes a hand-held bracket, connecting blocks symmetrically arranged on both sides of the hand-held bracket and two telescopic rods rotatably spliced ​​on the connecting blocks, a fixed block is installed at the end of the telescopic rod, and the yoke assembly is fixedly installed at the bottom of the fixed block.

[0005] Furthermore, the hand-held bracket includes a handle and a bracket body connected to the bottom of the handle, the handle is electrically connected to the power box, a power button is provided on the inner side of the handle, movable channels are provided at both ends of the bracket body, and the two connecting blocks are movably installed in the movable channels.

[0006] Furthermore, the connecting block comprises a plug-in section and a mounting section which are connected in sequence, the plug-in section is movably mounted in the movable channel, and the telescopic rod is rotatably mounted on the mounting section.

[0007] Furthermore, a locking block for limiting the position of the connecting block is provided on the side wall of the bracket body, a locking groove is provided on the surface of the plug-in section, and the bottom end of the locking block abuts against the locking groove.

[0008] Furthermore, two vertically arranged rotating shafts are provided on the end surface of the mounting section, and the two telescopic rods are respectively rotatably connected to the two rotating shafts, and the two telescopic rods are transmission-connected to each other.

[0009] Furthermore, a connecting tooth is provided on the outer wall of one end of the telescopic rod connected to the rotating shaft, the connecting teeth of the two telescopic rods are meshed with each other, and a buckle mechanism for splicing each other is provided on the side walls of the two telescopic rods.

[0010] Furthermore, the fixing block includes a connecting portion connected to the end of the telescopic rod and a fixing portion hinged to one end of the connecting portion, an installation cavity is provided in the fixing portion, and the yoke assembly is fixedly installed in the installation cavity.

[0011] Furthermore, the yoke assembly includes a plurality of metal blocks hinged in sequence, the metal block at the top is fixedly installed in the installation cavity, and the inner side of the metal block at the bottom is provided with a chamfered surface.

[0012] Furthermore, the metal block includes a plurality of stacked metal sheets, and the metal sheets of two adjacent metal blocks hinged to each other are stacked in sequence.

[0013] Furthermore, a nozzle is provided at the bottom of the bracket body, and a hose connected to the nozzle is provided at one end of the bracket body; an LED light is also provided at the bottom of the bracket body.

[0014] In summary, the beneficial effects of the present invention are:

[0015] 1. The present invention provides telescopic connecting blocks at both ends of the hand-held bracket, and two rotatable telescopic rods on the connecting blocks, so that the yoke assemblies on both sides of the detection host can adjust the distance between each other under the action of the connecting blocks and the telescopic rods, thereby facilitating flaw detection in various places and planes, and having a wide range of applications.

[0016] 2. In the present invention, each connecting block is rotatably connected to two telescopic rods, and each group of yoke assemblies is connected to the end of each telescopic rod through a fixed block. Therefore, when the detection host performs flaw detection on the surface of an object, each group of yoke assemblies can be extended and expanded through each telescopic rod, so that the surface to be detected can be surrounded by multiple yoke assemblies, which can enhance the magnetic field strength during surface detection of the workpiece, thereby facilitating the magnetic powder to penetrate the paint layer to display the defects and cracks on the surface of the workpiece, thereby realizing the function of flaw detection on the surface of the object to be detected without removing the paint surface, simplifying the detection steps and improving the detection efficiency.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of this embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of the detection host in this embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of the detection host from another angle of this embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the detection host after it is expanded in this embodiment.

[0022] In the figure: 1. power box; 2. detection host; 21. hand-held bracket; 211. handle; 212. bracket body; 213. power button; 22. connecting block; 221. plug-in section; 222. installation section; 223. locking groove; 224. rotating shaft; 23. telescopic rod; 231. connecting teeth; 24. fixing block; 241. connecting part; 242. fixing part; 3. yoke assembly; 31. metal block; 32. beveled surface; 4. locking block; 5. nozzle; 6. hose; 7. LED light. DETAILED DESCRIPTION

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described below based on specific embodiments in conjunction with the accompanying drawings.

[0024] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0025] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] like Figures 1 to 4As shown, a magnetic particle detector capable of detecting without removing the paint layer can perform magnetic particle flaw detection on the workpiece without processing the paint layer on the surface of the workpiece, thereby simplifying the flaw detection process and improving the detection efficiency; the magnetic particle detector of this embodiment comprises a power box 1, a detection host 2 electrically connected to the power box 1, and a yoke assembly 3 arranged on the detection host 2. When performing detection, the power box 1 provides power, so that the yoke assembly 3 on the detection host 2 is energized to generate a magnetic field, and the magnetic powder on the surface of the workpiece is adsorbed, so that the defects and cracks on the surface of the workpiece are revealed, thereby realizing the surface flaw detection of the workpiece; Specifically, the detection host 2 includes a hand-held bracket 21, connecting blocks 22 symmetrically arranged on both sides of the hand-held bracket 21, and two telescopic rods 23 rotatably spliced ​​on the connecting blocks 22, wherein the connecting blocks 22 of this embodiment are movably installed at both ends of the hand-held bracket 21, so that the telescopic rods 23 respectively installed on the two connecting blocks 22 can adjust the distance between each other by moving the connecting blocks 22, thereby adjusting the distance between the yoke assemblies 3 installed on the telescopic rods 23, which is convenient for this embodiment to perform flaw detection on the surfaces of workpieces of various forms, thereby expanding the scope of application.

[0027] The end of the telescopic rod 23 of this embodiment is connected to a fixed block 24, and the yoke assembly 3 is fixedly installed at the bottom of the fixed block 24, so that when the detection host 2 of this embodiment performs flaw detection on the surface of an object, each group of yoke assemblies 3 can be extended by each telescopic rod 23, and can be unfolded by rotating the telescopic rod 23, so that the surface to be detected can be cross-surrounded by four groups of yoke assemblies 3, thereby enhancing the magnetic field strength of the area below the detection host 2, thereby enhancing the magnetic field strength of the workpiece surface during detection, making it easier for magnetic powder to penetrate the paint layer to display defects and cracks on the workpiece surface, thereby realizing the function of flaw detection on the surface of the object to be detected without removing the paint surface, simplifying the detection steps, improving the detection efficiency, and avoiding secondary damage to the workpiece surface that may be caused by removing the paint layer, thereby protecting the appearance and performance of the workpiece.

[0028] In order to improve the accuracy and reliability of the magnetic particle flaw detector of this embodiment, the magnetic particle flaw detector of this embodiment adopts the duty cycle of the magnetization waveform, and the magnitude of the magnetization current can be changed by changing the proportion of the power-on time (i.e., changing the duty cycle) within a cycle, so that the yoke assembly 3 can generate magnetic fields of different sizes, thereby achieving the accuracy and reliability of the flaw detection results. Specifically, when the duty cycle increases, the power-on time increases, the magnetization current increases, the magnetic field formed by the yoke assembly 3 is enhanced, the magnetic powder is more easily adsorbed on the surface of the workpiece, and the displayed defects and cracks are more obvious; conversely, when the duty cycle decreases, the power-on time decreases, the magnetization current decreases, the magnetic field formed by the yoke assembly 3 weakens, the adsorption force of the magnetic powder weakens, and the displayed defects and cracks become less obvious. The power box 1 of the present embodiment is provided with an adjustment knob for adjusting the size of the magnetizing current. Therefore, when performing flaw detection on the surface of a workpiece with a paint layer, the magnetizing current can be increased by turning the adjustment knob, thereby enhancing the magnetic field generated by each group of yoke assemblies 3, so that the magnetic powder can be more easily adsorbed on the surface of the workpiece, and defects and cracks can be displayed through the paint layer, further realizing the function of performing flaw detection on the surface of the object to be tested without removing the paint surface in the present embodiment.

[0029] like Figures 2 to 4 As shown, the hand-held bracket 21 of this embodiment includes a handle 211 and a bracket body 212 connected to the bottom of the handle 211, the handle 211 is electrically connected to the power box 1, and a power button 213 is provided on the inner side of the handle 211. The operator can lift the detection host 2 by the handle 211 and place it above the surface of the workpiece to be detected, and then press the power button 213 to energize each group of yoke assemblies 3 to generate a magnetic field, thereby realizing flaw detection on the workpiece surface.

[0030] In order to achieve the movable adjustment of the connecting block 22, thereby achieving the adjustment of the distance between the yoke assemblies 3 on both sides of the detection assembly, movable channels are provided at both ends of the bracket body 212 of this embodiment, and the two connecting blocks 22 are movably installed in the two movable channels respectively. The two connecting blocks 22 can adjust the distance between each other by moving in the movable channels, thereby achieving the adjustment of the distance between the yoke assemblies 3 respectively installed on the two connecting blocks 22, which is convenient for this embodiment to be used in surface detection of workpieces in various places or forms.

[0031] Specifically, the connecting block 22 of the present embodiment includes a plug-in section 221 and a mounting section 222 which are connected in sequence, wherein the plug-in section 221 is movably mounted in the movable channel, the mounting section 222 is located outside the movable channel, and the telescopic rod 23 is rotatably mounted on the mounting section 222. The position between the mounting sections 222 of the two connecting blocks 22 can be adjusted by moving the plug-in section 221 in the movable channel, thereby realizing the adjustment of the distance between the telescopic rods 23 on both sides, thereby finally realizing the adjustment of the distance between the yoke assemblies 3, which is convenient for acting on different workpiece surfaces; in order to lock the adjusted position of the plug-in section 221 in the movable channel, thereby improving the stability of the yoke assembly 3 during the detection process, a locking block 4 is provided on the side wall of the bracket body 212 of the present embodiment, and a locking groove 223 is provided on the surface of the plug-in section 221. When the position adjustment of the plug-in section 221 is completed, the bottom end of the locking block 4 passes through the surface of the bracket body 212 and abuts against the locking groove 223, thereby realizing the limitation of the position of the connecting block 22.

[0032] like Figure 2 , Figure 3 and Figure 4 As shown, in order to realize the deployment of two groups of yoke assemblies 3 on the same side, thereby enhancing the magnetic field strength in the bottom area of ​​the detection host 2 and realizing the function of detecting without removing the paint layer in this embodiment, two vertically arranged rotating shafts 224 are arranged on the end face of the mounting section 222 in this embodiment, and the two telescopic rods 23 are rotatably connected to the two rotating shafts 224 respectively, so that the two telescopic rods 23 on the mounting section 222 can be rotated respectively through their respective rotating shafts 224, and then the yoke assemblies 3 respectively connected to the two telescopic rods 23 can be spliced ​​or separately deployed under the drive of the telescopic rods 23, so that when this embodiment performs flaw detection on the surface of a workpiece with a paint layer, the yoke assemblies 3 on the same side can be separated and deployed through the rotation of the telescopic rods 23, so that the workpiece is surrounded by multiple yoke assemblies 3, thereby enhancing the magnetic field strength on the surface of the workpiece and realizing the function of detecting without removing the paint layer.

[0033] like Figure 2 and Figure 4As shown, in order to enable the two telescopic rods 23 to be unfolded synchronously when unfolded, and to enable the two telescopic rods 23 to be spliced ​​and closed synchronously, the two telescopic rods 23 of this embodiment are connected to each other by transmission, so that when one of the telescopic rods 23 rotates around the rotating shaft 224, the other telescopic rod 23 can also be rotated and unfolded under the action of the transmission connection, so that the unfolding angles of the yoke assemblies 3 respectively connected to the two telescopic rods 23 are the same, which is convenient for realizing a uniform magnetic field, thereby improving the accuracy of the workpiece surface detection. Specifically, the outer wall of one end of the telescopic rod 23 connected to the rotating shaft 224 of this embodiment is provided with a connecting tooth 231, and the connecting teeth 231 of the two telescopic rods 23 are meshed with each other, so that when one of the telescopic rods 23 rotates, the other telescopic rod 23 can rotate in the opposite direction under the action of the meshing of the connecting teeth 231, thereby realizing the synchronous unfolding of the two telescopic rods 23; conversely, the two telescopic rods 23 can also be synchronously rotated and closed, which is convenient for realizing the accurate detection of this embodiment.

[0034] Furthermore, a snap mechanism is provided on the side walls of the two telescopic rods 23 of this embodiment that are close to each other, so that when the two telescopic rods 23 are rotated and closed, the snap structures between the two telescopic rods 23 can be snapped together, thereby achieving stable closure of the two telescopic rods 23 and avoiding unauthorized opening during work, which may affect the detection results.

[0035] like Figures 1 to 4 As shown, the yoke assembly 3 of the present embodiment is connected to the end of the telescopic rod 23 through a fixing block 24, wherein the fixing block 24 of the present embodiment includes a connecting portion 241 connected to the end of the telescopic rod 23 and a fixing portion 242 hinged to one end of the connecting portion 241, and a mounting cavity is provided in the fixing portion 242, and the yoke assembly 3 is fixedly installed in the mounting cavity, and the fixing portion 242 and the connecting portion 241 are hinged to each other, so that the yoke assembly 3 fixed in the mounting cavity can adjust the opening angle through the hinge position of the fixing portion 242 and the connecting portion 241, thereby facilitating the present embodiment to act on a plane with a larger specification for flaw detection, thereby expanding the scope of application of the present embodiment.

[0036] At the same time, if Figures 2 to 4 As shown, the yoke assembly 3 of the present embodiment includes a plurality of metal blocks 31 hinged in sequence, and the metal block 31 at the top is fixedly installed in the installation cavity, so that the yoke assembly 3 can be adjusted in angle through each hinged metal block 31 so as to be applicable to different planes, further expanding the application scope of the present embodiment; at the same time, the metal block 31 at the bottom of the present embodiment is provided with a chamfered surface 32 on the inner side, so that when working on certain special planes, the chamfered surface 32 can fit with the plane to ensure the accuracy of detection.

[0037] The metal block 31 of the present embodiment includes a plurality of stacked metal sheets, which can enhance the strength of the magnetic field generated by the yoke assembly 3 as a whole, thereby facilitating detection on the surface of a workpiece having a paint layer. Furthermore, the metal sheets of two adjacent mutually hinged metal blocks 31 of the present embodiment are stacked in sequence, which not only enhances the connection strength between the two adjacent metal blocks 31 and facilitates the arbitrary rotation of the two adjacent metal blocks 31, but also increases the strength of the formed magnetic field, thereby facilitating the realization of the function of the present embodiment for detection without removing the paint layer.

[0038] Further, such as Figure 3 As shown, a nozzle 5 is further provided at the bottom of the bracket body 212 of the present embodiment, and a hose 6 connected to the nozzle 5 is provided at one end of the bracket body 212, so that when the present embodiment performs flaw detection on the plane, the nozzle 5 can automatically spray out the magnetic suspension without manual spraying, thereby reducing the work process and improving the work efficiency; at the same time, an LED lamp 7 is also provided at the bottom of the bracket body 212 of the present embodiment, which can illuminate the flaw detection position during the detection process, so that the operator can find defects and cracks in time and improve the accuracy of the detection.

[0039] The working principle of the present embodiment is as follows: the present embodiment provides a retractable connecting block 22 at both ends of the hand-held bracket 21, and two rotatable telescopic rods 23 on the connecting block 22, so that the yoke assemblies 3 on both sides of the detection host 2 can adjust the distance between each other under the action of the connecting block 22 and the telescopic rod 23, so as to facilitate flaw detection in various places and planes, and has a wide range of applications; and, in the present embodiment, each connecting block 22 is rotatably connected to two telescopic rods 23, and each group of yoke assemblies 3 is connected to the end of each telescopic rod 23 through a fixing block 24, so that when the detection host 2 performs flaw detection on the surface of an object, each group of yoke assemblies 3 can be extended and expanded through each telescopic rod 23, so that the detected object can be easily detected. The detection surface can be surrounded by multiple yoke assemblies 3, which can enhance the magnetic field strength during workpiece surface detection, thereby facilitating the magnetic powder to penetrate the paint layer to display defects and cracks on the workpiece surface, thereby realizing the function of flaw detection on the surface of the object to be detected without removing the paint surface, simplifying the detection steps and improving the detection efficiency; at the same time, this embodiment sets a magnetic particle flaw detector with a duty cycle of a magnetizing waveform, and sets an adjustment knob on the power box 1, so that this embodiment can increase the magnetizing current by turning the adjustment knob, thereby enhancing the magnetic field generated by each group of yoke assemblies 3, making the magnetic powder more easily adsorbed on the workpiece surface, further realizing the function of flaw detection on the surface of the object to be detected without removing the paint surface.

[0040] The embodiments described above are only preferred implementation modes of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and modifications made by those skilled in the art on the basis of the invention shall fall within the protection scope of the present invention.

Claims

1. A magnetic particle detector capable of detecting without removing the paint layer, comprising a power supply box (1), a detection host (2) electrically connected to the power supply box (1), and a yoke assembly (3) arranged on the detection host (2), characterized in that: The detection host (2) comprises a hand-held bracket (21), connecting blocks (22) symmetrically arranged on both sides of the hand-held bracket (21), and two telescopic rods (23) rotatably spliced ​​on the connecting blocks (22), a fixed block (24) is installed at the end of the telescopic rod (23), and the yoke assembly (3) is fixedly installed at the bottom end of the fixed block (24); The hand-held bracket (21) comprises a handle (211) and a bracket body (212) connected to the bottom of the handle (211); the handle (211) is electrically connected to the power box (1); a power-on button (213) is provided on the inner side of the handle (211); movable channels are provided at both ends of the bracket body (212); and the two connecting blocks (22) are movably installed in the movable channels; The connecting block (22) comprises a plug-in section (221) and a mounting section (222) which are connected in sequence; the plug-in section (221) is movably mounted in the movable channel; the telescopic rod (23) is rotatably mounted on the mounting section (222); two vertically arranged rotating shafts (224) are provided on the end surface of the mounting section (222); the two telescopic rods (23) are respectively rotatably connected to the two rotating shafts (224); each connecting block (22) is rotatably connected to two telescopic rods (23); the two telescopic rods (23) are mutually transmission-connected; and each set of yoke assemblies (3) is respectively connected to the end of each telescopic rod (23) via a fixing block (24).

2. A magnetic particle detector capable of detecting without removing the paint layer according to claim 1, characterized in that: A locking block (4) for limiting the position of the connecting block (22) is provided on the side wall of the bracket body (212); a locking groove (223) is provided on the surface of the plug-in section (221); and the bottom end of the locking block (4) abuts against the locking groove (223).

3. The magnetic particle detector capable of detecting without removing the paint layer according to claim 1, characterized in that: A connecting tooth (231) is provided on the outer wall of one end of the telescopic rod (23) connected to the rotating shaft (224); the connecting teeth (231) of the two telescopic rods (23) mesh with each other; and a buckle mechanism for connecting the two telescopic rods (23) is provided on the side walls.

4. The magnetic particle detector capable of detecting without removing the paint layer according to claim 1, characterized in that: The fixing block (24) comprises a connecting portion (241) connected to the end of the telescopic rod (23) and a fixing portion (242) hinged to one end of the connecting portion (241); a mounting cavity is provided in the fixing portion (242); and the yoke assembly (3) is fixedly mounted in the mounting cavity.

5. The magnetic particle detector capable of detecting without removing the paint layer according to claim 4, characterized in that: The yoke assembly (3) comprises a plurality of metal blocks (31) hinged in sequence, the metal block (31) located at the top is fixedly installed in the installation cavity, and the metal block (31) located at the bottom is provided with a chamfered surface (32) on the inner side.

6. The magnetic particle detector capable of detecting without removing the paint layer according to claim 5, characterized in that: The metal block (31) comprises a plurality of stacked metal sheets, and the metal sheets of two adjacent metal blocks (31) hinged to each other are stacked in sequence.

7. The magnetic particle detector capable of detecting without removing the paint layer according to claim 1, characterized in that: A nozzle (5) is also provided at the bottom of the bracket body (212); a hose (6) connected to the nozzle (5) is provided at one end of the bracket body (212); and an LED lamp (7) is also provided at the bottom of the bracket body (212).

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