Crack detection device for induction coil copper pipe

Abstract

The utility model discloses a crack detection device for an induction coil copper pipe, and relates to the technical field of induction coil defect detection. The crack detection device comprises a workbench, a first guide assembly, a second guide assembly, an industrial camera and a prism, during use, the copper pipe is inserted into the first guide assembly and the second guide assembly, the visual system is started, after the copper pipe reaches the view field of the industrial camera, the image of the copper pipe on the prism and the copper pipe itself are shot by the industrial camera at the same time, and crack defect detection is carried out; the copper pipes continue to move along the first guide assembly and the second guide assembly under the pulling of the power device, then the visual system continues to carry out crack detection on the copper pipes, and the operation is circulated until all the copper pipes are detected. By arranging the prism, only one camera assembly can be used for photographing to obtain images of the periphery of the copper pipe, the structure is simple and reliable, the manufacturing cost is low, and the detection efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of induction coil defect detection technology, specifically a crack detection device for copper tubes of induction coils. Background Technology

[0002] The induction coil is the core component of induction heating. If there are cracks in the induction coil, it will not only reduce its mechanical strength, but also cause the current path to be blocked, the resistance to increase, and trigger the Joule heating effect, resulting in local high temperature, accelerating the aging of the coil or even burning it out. In addition, in high voltage or high current scenarios, the crack may break down the air and generate an electric arc, causing an electrical fire or equipment short circuit, which poses a significant safety hazard. Therefore, it is necessary to inspect the induction coil for cracks at the factory and on a regular basis to ensure the safe and reliable operation of the induction coil. Therefore, it is essential to develop a crack detection device for the copper tube of the induction coil. Here, it should be noted that cracks on the induction coil refer to cracks on the outer surface of the induction coil.

[0003] Currently, Chinese patent publication number CN221803842U discloses a steel wire burr detection device. This device first moves a camera assembly along a slide groove based on the diameter of the steel wire to focus on it. Then, a motor is started. As the steel wire moves axially along a second rotating shaft, the motor drives the coupling, encoder, and drive gear to rotate, which in turn drives the driven gear. During the rotation of the driven gear, the CCD camera acquires the trigger signal sent by the encoder in real time, taking pictures and processing the images of the steel wire to complete the burr detection. However, this device requires three sets of cameras evenly distributed around the steel wire to achieve comprehensive image capture, resulting in a complex structure, high manufacturing cost, difficult debugging, and low detection efficiency.

[0004] In summary, while existing defect detection devices for pipes and wires can detect defects to a certain extent, they still have many shortcomings. Therefore, we have developed a crack detection device for copper tubes with induction coils. Utility Model Content

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing devices and provide a crack detection device for copper tubes in induction coils. Through the guiding action of the first and second guide components, the copper tube can move smoothly and accurately along the long side of the worktable. By using a telecentric lens, copper tubes of different sizes can be clearly imaged within the field of view. By setting a prism, the copper tube is first imaged on the prism, and then a single camera assembly can simultaneously photograph the copper tube and the prism to obtain an image of the entire circumference of the copper tube. In summary, this copper tube defect detection device has a simple and reliable structure, low manufacturing cost, simple debugging, and high detection efficiency, effectively solving the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a crack detection device for copper tubes of induction coils, comprising a worktable, a first guide assembly, a second guide assembly, an industrial camera, and a prism;

[0007] The upper end of the worktable is linearly arrayed with multiple first guide components and second guide components. A spring is welded to the bottom inner side of the first guide component, and a movable guide roller frame is welded to the upper end of the spring. A movable guide roller is rotatably connected to the inner side of the movable guide roller frame through a bearing. A fixed guide roller frame is screwed to the top inner side of the first guide component relative to the movable guide roller frame. A fixed guide roller is rotatably connected to the inner side of the fixed guide roller frame through a bearing. The internal structure of the second guide component is rotated 90° relative to the first guide component, and the connection method is the same.

[0008] A camera assembly mounting bracket is screwed onto the upper end of the workbench. The camera assembly mounting bracket is bolted to the industrial camera. A telecentric lens is screwed onto the lower end of the industrial camera. A lens beam is sleeved on the lower end of the telecentric lens. A copper tube is provided below the lens beam, penetrating the first guide assembly and the second guide assembly.

[0009] A tray is provided below the copper tube, the tray is threadedly connected to the workbench, and the prism is attached to the top of the tray.

[0010] Preferably, the first guide component and the second guide component are alternately arranged along the long side of the worktable, and the distance between adjacent first guide components and second guide components is 50-60mm.

[0011] Preferably, the gap between the movable guide roller and the fixed guide roller is 0.5 mm smaller than the width of the copper tube.

[0012] Preferably, the depth of field of the telecentric lens is greater than the distance from the copper tube to the prism.

[0013] Preferably, the prism has an inclination of 45°, there are two prisms, the long and narrow sides of the two prisms are in contact and fit together, and the contact line is parallel to the axis of the copper tube. The two prisms are offset by 10mm relative to the axis of the copper tube along the width of the workbench and fixed to the upper end of the tray.

[0014] Compared with existing technologies, the advantages of this invention are as follows: The guiding action of the first and second guide components allows the copper tube to move smoothly and accurately along the long side of the worktable; the use of a telecentric lens enables clear imaging of copper tubes of different sizes within the field of view; and the inclusion of a prism allows the copper tube to be imaged first on the prism, enabling simultaneous imaging of both the copper tube and the prism using only one camera assembly to obtain an image of the entire circumference of the copper tube. In summary, this copper tube defect detection device is simple and reliable in structure, low in manufacturing cost, easy to debug, and highly efficient in detection. Attached Figure Description

[0015] Figure 1 This is an isometric view of the present invention;

[0016] Figure 2 This is a partial enlarged view of the camera assembly of this utility model;

[0017] Figure 3 This is a diagram showing the internal structure of the first guide component of this utility model;

[0018] Figure 4 This is a diagram showing the internal structure of the second guide component of this utility model;

[0019] Figure 5 This is an axonometric view of the prism of this utility model.

[0020] In the diagram: 1 is the workbench, 2 is the support, 3 is the first guide assembly, 4 is the second guide assembly, 5 is the spring, 6 is the movable guide roller frame, 7 is the movable guide roller, 8 is the fixed guide roller frame, 9 is the fixed guide roller, 10 is the camera assembly mounting bracket, 11 is the industrial camera, 12 is the telecentric lens, 13 is the lens beam, 14 is the tray, 15 is the prism, and 16 is the copper tube. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a crack detection device for copper tubes of induction coils, including a worktable 1, a first guide assembly 3, a second guide assembly 4, an industrial camera 11, and a prism 15;

[0023] The upper end of the worktable 1 is linearly arrayed with multiple first guide components 3 and second guide components 4. A spring 5 is welded to the bottom inner side of the first guide component 3. A movable guide roller frame 6 is welded to the upper end of the spring 5. A movable guide roller 7 is rotatably connected to the inner side of the movable guide roller frame 6 through a bearing. A fixed guide roller frame 8 is screwed to the top inner side of the first guide component 3 relative to the movable guide roller frame 6. A fixed guide roller 9 is rotatably connected to the inner side of the fixed guide roller frame 8 through a bearing. The internal structure of the second guide component 4 is 90° rotated and the connection method is the same as that of the first guide component 3.

[0024] A camera assembly mounting bracket 10 is screwed onto the upper end of the worktable 1. The camera assembly mounting bracket 10 is bolted to the industrial camera 11. The industrial camera 11 is locked in place by the bolts, making installation and disassembly convenient. The axial position of the industrial camera 11 is adjusted by the bolts, thereby adjusting the shooting working distance. A telecentric lens 12 is screwed onto the lower end of the industrial camera 11. A lens light 13 is sleeved on the lower end of the telecentric lens 12. The lens light 13 provides illumination, enabling the industrial camera 11 to acquire images with more prominent defect features.

[0025] Below the lens light 13, a copper tube 16 is provided, which passes through the first guide assembly 3 and the second guide assembly 4. The straightness of the movement of the copper tube 16 is ensured by setting multiple first guide assemblies 3 and second guide assemblies 4. That is, the vertical freedom of the copper tube 16 is limited by the movable guide roller 7 and the fixed guide roller 9 inside the first guide assembly 3, and the horizontal freedom of the copper tube 16 is limited by the movable guide roller 7 and the fixed guide roller 9 inside the second guide assembly 4. A tray 14 is provided below the copper tube 16. The tray 14 is threadedly connected to the worktable 1, and a prism 15 is glued on the top of the tray 14.

[0026] Understandably, the copper tube 16 moves inside the first guide assembly 3 and the second guide assembly 4 under the pulling force of the external power device. By using the telecentric lens 12, copper tubes 16 of different sizes can be clearly imaged in the field of view. By setting the prism 15, the copper tube 16 is first imaged on the prism 15. Then, only one set of camera components is used to take pictures of the copper tube 16 and the prism 15 at the same time to obtain an image of the copper tube 16 around the whole circle. The structure is simple and reliable, with low manufacturing cost, simple debugging, and high detection efficiency.

[0027] Furthermore, the first guide component 3 and the second guide component 4 are alternately arranged along the long side of the worktable 1, and the distance between adjacent first guide components 3 and second guide components 4 is 50-60mm. By alternately arranging multiple first guide components 3 and second guide components 4, the straightness of the copper tube 16 during movement is positioned.

[0028] Furthermore, the gap between the movable guide roller 7 and the fixed guide roller 9 is 0.5mm smaller than the width of the copper tube 16, and the movable guide roller 7 and the fixed guide roller 9 can clamp the copper tube 16 by the action of the spring 5.

[0029] Furthermore, the depth of field of the telecentric lens 12 is greater than the distance from the copper tube 16 to the prism 15, ensuring that the images on the copper tube 16 and the prism 15 can be clearly captured.

[0030] Furthermore, the prism 15 has an inclination of 45°, and there are two prisms 15. The long and narrow sides of the two prisms 15 are in contact and fit together, and the contact line is parallel to the axis of the copper tube 16. The two prisms 15 are offset by 10mm relative to the axis of the copper tube 16 along the width direction of the worktable 1 and fixed to the upper end of the tray 14. By setting prisms 15 on both sides below the copper tube 16, and the contact line of the two prisms 15 is offset from the axis of the copper tube 16, it can be ensured that one prism 15 can reflect the image of the side and bottom of the copper tube 16, and the other prism 15 reflects the image of the other side of the copper tube 16. The industrial camera 11 captures the image of the upper part of the copper tube 16 and the image reflected by the two prisms 15, thereby obtaining the image of the copper tube 16 from all sides.

[0031] Working principle: In use, the copper tube 16 is inserted into the first guide assembly 3 and the second guide assembly 4. The vision system is activated. After the copper tube 16 enters the field of view of the industrial camera 11, the image of the copper tube 16 on the prism 15 and the copper tube 16 itself are simultaneously captured by the industrial camera 11 and crack defect detection is performed. After this section is detected, the copper tube 16 continues to move along the first guide assembly 3 and the second guide assembly 4 under the pull of the power device. Then the vision system continues to perform crack detection on the copper tube 16. The above operation is repeated until all copper tubes 16 have been detected.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crack detection device for copper tubes of induction coils, characterized in that: It includes a worktable (1), a first guide assembly (3), a second guide assembly (4), an industrial camera (11), and a prism (15). The upper end of the workbench (1) is linearly arrayed with multiple first guide components (3) and second guide components (4). A spring (5) is welded to the bottom inner side of the first guide component (3). A movable guide roller frame (6) is welded to the upper end of the spring (5). A movable guide roller (7) is rotatably connected to the inner side of the movable guide roller frame (6) through a bearing. A fixed guide roller frame (8) is screwed to the top inner side of the first guide component (3) relative to the movable guide roller frame (6). A fixed guide roller (9) is rotatably connected to the inner side of the fixed guide roller frame (8) through a bearing. The internal structure of the second guide component (4) is 90° rotated and the connection method is the same as that of the first guide component (3). The upper end of the workbench (1) is screwed with a camera assembly mounting bracket (10), the camera assembly mounting bracket (10) is bolted to the industrial camera (11), the lower end of the industrial camera (11) is screwed with a telecentric lens (12), the lower end of the telecentric lens (12) is fitted with a lens beam (13), and a copper tube (16) passing through the first guide assembly (3) and the second guide assembly (4) is provided below the lens beam (13). A tray (14) is provided below the copper tube (16), the tray (14) is threadedly connected to the workbench (1), and the prism (15) is attached to the top of the tray (14).

2. The crack detection device for copper tubes of induction coils according to claim 1, characterized in that: The first guide component (3) and the second guide component (4) are alternately arranged along the long side of the worktable (1), and the distance between adjacent first guide components (3) and second guide components (4) is 50-60mm.

3. The crack detection device for copper tubes of induction coils according to claim 1, characterized in that: The gap between the movable guide roller (7) and the fixed guide roller (9) is 0.5 mm smaller than the width of the copper tube (16).

4. The crack detection device for copper tubes of induction coils according to claim 1, characterized in that: The depth of field of the telecentric lens (12) is greater than the distance from the copper tube (16) to the prism (15).

5. A crack detection device for copper tubes of induction coils according to claim 1, characterized in that: The prism (15) has an inclination of 45°. There are two prisms (15). The long and narrow sides of the two prisms (15) are in contact and fit together, and the contact line is parallel to the axis of the copper tube (16). The two prisms (15) are offset by 10mm relative to the axis of the copper tube (16) along the width direction of the worktable (1) and fixed on the upper end of the tray (14).

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