A surface defect detection apparatus for seamless steel pipes

Abstract

This invention discloses a surface defect detection device for seamless steel pipes, comprising a first workpiece, a second workpiece, a detection component, and a driving component. The first workpiece is capable of relative movement with the steel pipe along a first direction, which is consistent with the length direction of the steel pipe. The second workpiece is slidably connected to the first workpiece, and the sliding direction of the second workpiece intersects with the length direction of the steel pipe. The end of the second workpiece near the steel pipe has an abutment end. The detection component includes a camera assembly and an illumination assembly, both of which are mounted on the second workpiece. The driving component provides an elastic driving force to the second workpiece to drive it to slide towards the steel pipe. The purpose of this invention is to solve the technical problem that changes in the shape, size, or inclination of the seamless steel pipe alter the distance between the detection device and the seamless steel pipe, resulting in the detection area not being properly projected onto the steel pipe surface, thus affecting the detection effect.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, and more specifically, relates to a surface defect detection device for seamless steel pipes. Background Technology

[0002] Seamless steel pipe is a type of steel pipe without weld seams. It is produced by processing solid steel billets into hollow tubes through processes such as hot rolling, cold rolling, cold drawing, or extrusion. During the manufacturing process of seamless steel pipe, various factors can lead to surface defects. These factors include raw material defects, such as cracks and inclusions in the billet; improper processing techniques, such as rolling temperature deviations or uncontrolled piercing parameters causing cracks, folds, and scale; and subsequent processing defects, such as heat treatment cracks or excessive pickling. Surface defects reduce the strength and corrosion resistance of the steel pipe, potentially leading to leaks, fractures, and other accidents when used in high-pressure, high-temperature, or corrosive environments. Therefore, to reduce safety hazards caused by surface defects, surface defect detection is necessary during the manufacturing process of seamless steel pipe.

[0003] A common type of equipment for detecting surface defects in seamless steel pipes is the visual inspection device. This device simulates the visual perception of the human eye and the analytical functions of the brain, combining high-speed imaging, image processing, and intelligent algorithms to achieve automated identification and classification of surface defects in steel pipes. Its core components consist of a camera assembly, an illumination assembly, and an image processing system. For example... Figure 1 As shown, during inspection, there is a partial overlap between the line of sight of the camera component and the illumination direction of the lighting component; this overlapping area is the inspection area. When the distance between the camera component and the lighting component and the seamless steel pipe is just such that the inspection area is reflected on the surface of the steel pipe, the camera component and the lighting component are in the optimal inspection position, at which point a better visual inspection effect can be obtained.

[0004] However, in actual inspection of surface defects of seamless steel pipes, since the camera and lighting components are usually fixed, and the distance between them and the seamless steel pipe changes when the shape, size, or tilt of the seamless steel pipe changes, the inspection area cannot be well reflected on the surface of the steel pipe, which ultimately affects the inspection results. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a surface defect detection device for seamless steel pipes, so as to solve the technical problem that when the shape, size or inclination of the seamless steel pipe changes, the distance between the detection device and the seamless steel pipe changes, which in turn makes it impossible for the detection area to be well reflected on the surface of the steel pipe, thus affecting the detection effect.

[0006] To achieve the aforementioned objective, the technical solution adopted by this invention includes: a surface defect detection device for seamless steel pipes, characterized in that it comprises: The first workpiece is capable of relative movement with the steel pipe along a first direction, and the first direction is consistent with the length direction of the steel pipe. The second workpiece is slidably connected to the first workpiece, the sliding direction of the second workpiece intersects with the length direction of the steel pipe, and the end of the second workpiece near the steel pipe has an abutting end; The detection component includes a camera assembly and a lighting assembly, both of which are mounted on the second workpiece; The driving component provides an elastic driving force to the second workpiece to drive it to slide closer to the steel pipe so that the abutting end abuts against the surface of the steel pipe. When the position of the steel pipe relative to the detection component changes, the driving component can adjust the second workpiece in a timely manner by means of elastic force so that the abutting end abuts against the surface of the steel pipe.

[0007] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides a surface defect detection device for seamless steel pipes, which has a small number of parts, a simple structure, and is easy to maintain.

[0008] (2) The present invention provides a surface defect detection device for seamless steel pipes. The second workpiece is brought into contact with the surface of the steel pipe by the elastic driving force of the driving component. With the relative movement of the steel pipe and the first workpiece, the camera component can continuously collect images of different positions on the surface of the steel pipe. After signal processing and image analysis, it can be determined whether there are defects on the surface of the steel pipe. The lighting component can provide lighting conditions in real time in order to obtain better detection results.

[0009] (3) The present invention provides a surface defect detection device for seamless steel pipes. When the position of the steel pipe relative to the detection component changes (i.e., when the size, shape and tilt of the steel pipe occur), the driving component adjusts the second workpiece in time by means of elastic force so that the contact end is always in elastic contact with the surface of the steel pipe, so that the distance between the detection component and the surface of the steel pipe remains as constant as possible. It is only necessary to pre-determine the distance from the detection component to the steel pipe according to the detection area of ​​the camera component and the lighting component, so that the detection area is exactly reflected on the surface of the steel pipe, so that the camera component and the lighting component are in the best detection position, so as to obtain a better visual detection effect.

[0010] Furthermore, an elastic element is provided between the second workpiece and the first workpiece, the elastic element being used to drive the second workpiece back to its original state when the driving component removes its driving force.

[0011] Furthermore, the driving component includes a magnetic block, which is a magnetized second workpiece. When the second workpiece approaches the steel pipe, it can move closer to the surface of the steel pipe under the attraction of the steel pipe so that the abutting end abuts against the surface of the steel pipe.

[0012] Furthermore, the first workpiece includes a mounting base, and the mounting base has a mounting hole extending through it along the length of the steel pipe. The axis of the mounting hole is parallel to the first direction, and the steel pipe can pass through the mounting hole when it moves relative to the first workpiece along the first direction. Multiple mounting tubes are provided inside the mounting hole. The multiple mounting tubes are arranged sequentially along the circumference of the mounting hole. The end of the mounting tube facing away from the mounting hole extends toward the center of the mounting hole. The side of the mounting tube facing the steel pipe is open. The second workpiece is a rod-shaped structure. There are multiple second workpieces, and each second workpiece is inserted into each mounting tube in a one-to-one correspondence and is slidably connected to each mounting tube in a one-to-one correspondence.

[0013] Furthermore, the end of the camera assembly facing the steel pipe is the camera end, and the end of the lighting assembly facing the steel pipe is the lighting end. The camera end and the lighting end are on the same plane facing the steel pipe. The detection component has a protective part on the side facing the steel pipe. The protective part is made of transparent material and has a mounting surface on the side of the detection component. The mounting surface is attached to the side of the camera end and the lighting end facing the steel pipe.

[0014] Furthermore, the protective component has a cleaning surface on the side facing away from the detection component. The cleaning surface is perpendicular to the sliding direction of the second workpiece. A cleaning plate is provided on the cleaning surface. The cleaning plate is movably connected to the first workpiece. A camera port and an illumination port are provided on the cleaning plate. When the camera port and the camera end coincide, and the lighting port and the lighting end coincide, the cleaning plate is in the first state. When the camera port and the camera end are misaligned, and the lighting port and the lighting end are misaligned, the cleaning plate is in the second state. By driving the cleaning plate to generate displacement, the cleaning plate can switch between the first state and the second state, and the protective plate can be cleaned during the switching process.

[0015] Furthermore, the mounting tube is provided with a drive structure for driving the cleaning disc to rotate. The drive structure includes a groove formed on the outer wall of the mounting tube, the groove comprising: The first groove extends along a direction intersecting the length of the mounting pipe; The second groove is located on the side of the first groove closer to the steel pipe, and the second groove is set along the length of the installation pipe; A connecting groove is provided between the first groove and the second groove, thereby connecting the first groove and the second groove into a continuous groove structure. The driving structure also includes a rotating ring, which is slidably sleeved on the outside of the mounting tube. A driving post is provided on the inner side of the rotating ring, and the driving post is located in a groove. When the driving post slides in the first groove, it can drive the rotating ring to rotate. The rotating ring is fixedly connected to the cleaning plate and movably connected to the second workpiece. When the second workpiece slides along the length of the mounting tube, it can drive the rotating ring to move synchronously. At the same time, the driving post slides in the groove, and when the driving post slides in the first groove, it can make the rotating ring rotate relative to the mounting tube and the second workpiece.

[0016] Furthermore, a first mounting plate is slidably sleeved on the outside of the mounting tube. The first mounting plate is fixedly connected to the second workpiece. A second mounting plate is inserted into the first mounting plate. The camera assembly and the lighting assembly are both mounted on the second mounting plate. A magnetic locking structure is provided between the first mounting plate and the second mounting plate.

[0017] Furthermore, a limiting rod is provided on the second mounting plate, the axis of which is perpendicular to the cleaning surface. An arc-shaped notch is provided on the cleaning plate, and the center of the arc of the notch coincides with the rotation axis of the rotating ring. When the cleaning plate changes from the second state to the first state, the limiting rod gradually engages with the arc-shaped notch to restrict the movement of the second mounting plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The accompanying diagram is for the background technology. Figure 2 This is a schematic diagram of the structure of the testing equipment before testing; Figure 3 A schematic diagram of the structure of the testing equipment before testing. Figure 1 ; Figure 4 A schematic diagram of the structure of the testing equipment before testing. Figure 2 ; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure; Figure 6 for Figure 5 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the structure of the testing equipment during testing; Figure 8 This is a partial structural diagram of the testing equipment. Figure 1 ; Figure 9 This is a partial structural diagram of the testing equipment. Figure 2 ; Figure 10 for Figure 9 A schematic diagram of the cross-sectional structure; Figure 11 for Figure 10 A magnified structural diagram at point B in the middle.

[0020] Figure label: First workpiece 1, Second workpiece 2, Steel pipe 3, Camera assembly 4, Lighting assembly 5, Rolling structure 6, Elastic component 7, Mounting base 8, Mounting hole 9, Mounting tube 10, Protective component 11, Cleaning plate 12, Camera port 13, Lighting port 14, Slide 15, Rotating ring 16, First groove 17, Second groove 18, Connecting groove 19, Drive column 20, First mounting plate 21, Second mounting plate 22, Magnetic locking structure 23, Connecting rod 24, Through hole 25, Limiting rod 26, Arc-shaped notch 27, Limiting piece 28. Detailed Implementation

[0021] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0022] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0024] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0025] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0026] Please see Figure 2-9 The present invention provides a technical solution: a surface defect detection device for seamless steel pipe 3, comprising a first workpiece 1, a second workpiece 2, a detection component and a driving component.

[0027] The first workpiece 1 can move relative to the steel pipe 3 along a first direction, and the first direction is consistent with the length direction of the steel pipe 3. It should be noted that the relative movement of the first workpiece 1 along the first direction with the steel pipe 3 can occur in the following ways: 1. The first workpiece 1 remains stationary, for example, fixed to the ground, while the steel pipe 3 can move along the first direction; 2. The first workpiece 1 can move along the first direction, while the steel pipe 3 remains in a fixed position; 3. Both the first workpiece 1 and the steel pipe 3 move along the first direction, but in opposite directions; 4. The first workpiece 1 and the steel pipe 3 move in the same direction and with the same orientation, but at different speeds. All of the above scenarios should be considered within the scope of protection.

[0028] The second workpiece 2 is slidably connected to the first workpiece 1. The sliding direction of the second workpiece 2 intersects the length direction of the steel pipe 3. This intersects the length direction of the steel pipe 3 (i.e., the first direction), allowing the second workpiece 2 to be positioned perpendicular to the length direction of the steel pipe 3 (or at a certain angle to the length direction of the steel pipe 3). This ensures that the end of the second workpiece 2 near the steel pipe 3 can abut against the surface of the steel pipe 3 after sliding. The end of the second workpiece 2 near the steel pipe 3 has an abutting end. Under the action of external force, the second workpiece 2 can move towards or away from the steel pipe 3, causing its abutting end to abut against the surface of the steel pipe 3. This ensures that the detection component installed on the second workpiece 2 maintains a relatively stable distance from the surface of the steel pipe 3 (this distance remains constant regardless of changes in the shape, size, and tilt angle of the steel pipe 3).

[0029] The detection components include a camera assembly 4 and an illumination assembly 5, both of which are mounted on the second workpiece 2. The camera assembly 4 and the illumination assembly 5 are mounted on the second workpiece 2 and can move with the second workpiece 2. When the first workpiece 1 and the steel pipe 3 move relative to each other, the second workpiece 2 and the steel pipe 3 also move relative to each other, and thus the camera assembly 4 and the illumination assembly 5 move relative to the steel pipe 3. This allows the camera assembly 4 and the illumination assembly 5 to perform detection scanning of different positions on the surface of the steel pipe 3 during the relative movement of the camera assembly 4 and the illumination assembly 5 relative to the steel pipe 3 along the length of the steel pipe 3.

[0030] The camera component 4 is used to acquire image information of the surface of the steel pipe 3. Image processing technology is then used to analyze and determine whether defects exist on the surface of the steel pipe 3. Its working principle involves using an optical lens to focus the image of the steel pipe 3's surface onto an image sensor. The image sensor converts the light signal into an electrical signal, which is then processed by subsequent signal processing and image analysis algorithms to obtain the detection result. The lighting component 5 provides suitable lighting conditions for the camera component 4, ensuring that the camera component 4 can clearly acquire images of the steel pipe 3's surface. Its working principle involves using light-emitting elements (such as LEDs) to emit light of specific intensity and angle, illuminating the surface of the steel pipe 3 and making its features more clearly visible for capture by the camera component 4.

[0031] The driving component provides an elastic driving force to the second workpiece 2, causing it to slide closer to the steel pipe 3 so that its abutting end abuts against the surface of the steel pipe 3. When the position of the steel pipe 3 relative to the detection component changes, the driving component, through its elastic force, can promptly adjust the second workpiece 2 to ensure that its abutting end remains in contact with the surface of the steel pipe 3. The function of the driving component is to provide power to the second workpiece 2, enabling it to automatically move closer to the steel pipe 3 and maintain contact between its abutting end and the surface of the steel pipe 3. Under the action of the driving component, the second workpiece 2 maintains an elastic abutting state with the surface of the steel pipe 3. This elastic abutting state can automatically adjust the extension and contraction of the second workpiece 2 when the shape, size, or tilt angle of the steel pipe 3 changes, ensuring that its abutting end remains in contact with the surface of the steel pipe 3.

[0032] It should be noted that there are several common ways to apply elastic driving force to the drive components: 1. The second workpiece 2 is moved by a pushing structure such as a hydraulic push rod or an electric push rod, but the pushing end of the pushing structure and the second workpiece 2 need to be connected by elastic elements such as springs and elastic sheets; 2. A pneumatic actuation structure is provided. The pneumatic actuation structure has a cavity for containing gas. The cavity has a sliding channel. The sliding channel is set along the first direction. The end of the sliding channel facing the steel pipe 3 is connected to the outside, and the end away from the steel pipe 3 is connected to the cavity. The end of the second workpiece 2 away from the steel pipe 3 is slidably and sealed in the sliding channel. The cavity is connected to a pneumatic pressure regulating structure. By injecting or extracting gas into the cavity through the pneumatic pressure regulating structure, the second workpiece 2 can be driven to move. Due to the compressibility of air pressure, an elastic driving force is provided. Third, a magnetic attraction structure is set on the second workpiece 2. The magnetic attraction between the magnetic attraction structure and the steel pipe 3 can ensure that the abutting end is always in contact with the surface of the steel pipe 3. It should be noted that the seamless steel pipe 3 is usually made of magnetic materials such as carbon steel.

[0033] The specific implementation steps are as follows: Step 1: Start the drive unit. The drive unit provides elastic driving force to the second workpiece 2, causing the second workpiece 2 to slide towards the steel pipe 3 until the abutting end of the second workpiece 2 elastically abuts against the surface of the steel pipe 3.

[0034] Step 2: Turn on the lighting component 5. The light-emitting element emits light of a specific intensity and angle to illuminate the surface of the steel pipe 3, providing suitable lighting conditions for the subsequent image acquisition by the camera component 4.

[0035] Step 3: Turn on the camera component 4, use the optical lens to focus the image of the surface of the steel pipe 3 onto the image sensor, the image sensor converts the light signal into an electrical signal, and begins to collect image information of the surface of the steel pipe 3.

[0036] Step 4: Make the first workpiece 1 move relative to the steel pipe 3 along the first direction (consistent with the length direction of the steel pipe 3), while the second workpiece 2 slides on the first workpiece 1 (its sliding direction intersects with the length direction of the steel pipe 3), causing the camera component 4 and the lighting component 5 to move relative to the steel pipe 3. During the relative movement along the length direction of the steel pipe 3, the camera component 4 continuously collects image information at different positions on the surface of the steel pipe 3.

[0037] Step 5: The camera component 4 will process the acquired image information through subsequent signal processing and image analysis algorithms to determine whether there are defects on the surface of the steel pipe 3.

[0038] Step Six: When the position of the steel pipe 3 relative to the detection component changes, the driving component adjusts the second workpiece 2 in a timely manner by means of elastic force, so that the contact end and the surface of the steel pipe 3 always maintain an elastic contact state, ensuring a relatively stable distance between the camera component 4 and the surface of the steel pipe 3, and continuously performing detection scanning.

[0039] Furthermore, in order to reduce the friction between the contact end and the surface of the steel pipe 3 when the second workpiece 2 moves relative to the steel pipe 3, a rolling structure 6 such as a roller or ball is provided at the contact end, and the rolling structure 6 abuts against the surface of the steel pipe 3.

[0040] In this embodiment, an elastic element 7 is provided between the second workpiece 2 and the first workpiece 1. The elastic element 7 is used to drive the second workpiece 2 back to its original state when the driving component removes its driving force.

[0041] Once the driving force is removed from the driving component, the elastic element 7 releases its stored elastic potential energy to return to its original undeformed state, generating an elastic force opposite to the direction of movement of the second workpiece 2. This drives the second workpiece 2 to slide away from the steel pipe 3 until it returns to its initial position. Therefore, during the inspection process, when it is not necessary for the second workpiece 2 to remain in contact with the steel pipe 3 (i.e., when the inspection is completed or before it begins), the second workpiece 2 can return to its initial position, thereby driving the inspection component back to its original position, preparing for the next inspection, and improving the ease of operation and efficiency of the inspection equipment.

[0042] In this embodiment, the driving component includes a magnetic block, which is a magnetized second workpiece 2. When the second workpiece 2 approaches the steel pipe 3, it can move closer to the surface of the steel pipe 3 under the attraction of the steel pipe 3 so that the abutting end abuts against the surface of the steel pipe 3.

[0043] When the magnetized second workpiece 2 approaches the steel pipe 3, magnetic domains are generated because the steel pipe 3 is made of ferromagnetic materials such as carbon steel. Under the influence of an external magnetic field (the magnetic field generated by the magnetized second workpiece 2), these magnetic domains rearrange, magnetizing the surface of the steel pipe 3 and generating a magnetic field that attracts the magnetic field of the second workpiece 2. This creates an attraction between the two, driving the second workpiece 2 towards the surface of the steel pipe 3. When the steel pipe 3 moves away from the second workpiece 2 (i.e., before or after detection), this magnetic attraction gradually weakens or disappears, allowing the second workpiece 2 to return to its original state under the elastic force of the elastic element 7. It should be noted that the steel pipe 3 is relatively heavy, and the attraction between the second workpiece 2 and the steel pipe 3 is insufficient to cause a change in the position of the steel pipe 3. Even if the position of the steel pipe 3 changes, the detection effect is not affected because the contact end always remains against the surface of the steel pipe 3.

[0044] The above settings have the following beneficial effects: ① Instead of traditional complex mechanical drive devices, magnetic force, a non-contact force, is used to provide a continuous and stable driving force for the second workpiece 2 to approach the surface of the steel pipe 3, so that the contact end can closely abut against the surface of the steel pipe 3, and the detection component installed on the second workpiece 2 maintains a suitable relative position with the surface of the steel pipe 3.

[0045] ② During the testing process, when the shape, size, or tilt angle of the steel pipe 3 changes, or when the surface of the steel pipe 3 has a certain degree of bending, unevenness, or a slight change in the diameter of the steel pipe 3, the magnetic force between the magnetic block and the steel pipe 3 will automatically adjust according to the change in distance. This adaptive adjustment capability ensures that the contact end can always maintain good contact with the surface of the steel pipe 3 without the need for additional manual or mechanical adjustment, thus improving the flexibility and accuracy of the testing.

[0046] ③ Compared to traditional drive methods that require multiple mechanical transmission components (such as motors, lead screws, gears, etc.), using magnetic blocks as the drive component greatly simplifies the overall structure of the equipment. This reduces friction and wear between mechanical parts, as well as potential mechanical failures, thus lowering the complexity and manufacturing cost of the equipment.

[0047] It should be understood that the magnetic attraction between the second workpiece 2 and the steel pipe 3 should be able to overcome the elastic force of the elastic element 7 and cause the second workpiece 2 to move closer to the steel pipe 3.

[0048] In this embodiment: the first workpiece 1 includes a mounting base 8, which can be fixed to the ground or move along a first direction, as described above regarding the various ways in which the first workpiece 1 moves relative to the steel pipe 3 along the first direction. The mounting base 8 has a through-hole 9 extending along the length of the steel pipe 3. The axis of the mounting hole 9 is parallel to the first direction. When the steel pipe 3 moves relative to the first workpiece 1 along the first direction, it can smoothly pass through the mounting hole 9, thereby allowing surface defects of the steel pipe 3 to be detected by the detection component.

[0049] Multiple mounting tubes 10 are provided inside the mounting hole 9. The multiple mounting tubes 10 are arranged sequentially along the circumference of the mounting hole 9, and each mounting tube 10 provides a mounting position for each second workpiece 2. The end of the mounting tube 10 facing away from the mounting hole 9 extends toward the center of the mounting hole 9, so that when the second workpiece 2 slides along the length of the mounting tube 10, its abutting end can abut against the surface of the steel pipe 3.

[0050] Furthermore, in order to make the distribution of the detection components more uniform, multiple mounting tubes 10 are arranged evenly along the circumference of the mounting hole 9.

[0051] The mounting tube 10 is open on the side facing the steel pipe 3. The open design provides a mounting base for the insertion of the second workpiece 2, and also facilitates the extension of the abutting end on the second workpiece 2 to contact the surface of the steel pipe 3.

[0052] The second workpiece 2 is a rod-shaped structure, and there are multiple second workpieces 2. Each second workpiece 2 is inserted into each mounting tube 10 in a one-to-one correspondence and is slidably connected to each mounting tube 10 in a one-to-one correspondence. The design of multiple second workpieces 2 allows for inspection of the surface of the steel pipe 3 from different angles and positions, improving the comprehensiveness and accuracy of the inspection.

[0053] Each second workpiece 2 slides within its corresponding mounting tube 10. When the driving component (such as the magnetic block mentioned above) is activated, the second workpiece 2 can slide along the length direction of the mounting tube 10 (which intersects with the length direction of the steel pipe 3) towards or away from the steel pipe 3 under the guidance of the mounting tube 10.

[0054] Specifically, the elastic element 7 is a spring sleeved on the second workpiece 2, with one end of the spring fixedly connected to the lower end of the second workpiece 2 and the other end fixedly connected to the lower end of the mounting tube 10.

[0055] Furthermore, the mounting base 8 is fixed on the ground, and the testing equipment includes a conveying structure for conveying the steel pipe 3. The conveying structure is arranged along a first direction. The conveying structure can be a belt conveyor. The conveying structure has a first part and a second part, which are arranged sequentially along the first direction. The mounting base 8 is located between the first part and the second part.

[0056] In this embodiment: the end of the camera component 4 facing the steel pipe 3 is the camera end, and the end of the lighting component 5 facing the steel pipe 3 is the lighting end. The camera end and the lighting end facing the steel pipe 3 are on the same plane. A protective component 11 is provided on the side of the detection component facing the steel pipe 3. The protective component 11 is made of transparent material and has a mounting surface on the side of the detection component. The mounting surface is attached to the side of the camera end and the lighting end facing the steel pipe 3.

[0057] The protective component 11 is made of transparent material, based on the excellent light transmittance of transparent materials. During the inspection of the steel pipe 3 surface by the detection component, the camera assembly 4 needs to acquire image information of the steel pipe 3 surface through the camera end, while the lighting assembly 5 provides sufficient and uniform light for the imaging process through the lighting end. The transparent protective component 11 is installed on the side of the camera end and lighting end facing the steel pipe 3, forming a physical barrier without affecting light propagation and image acquisition. Light can pass smoothly through the protective component 11 to reach the surface of the steel pipe 3, and the light reflected back from the surface of the steel pipe 3 can also pass through the protective component 11 and be received by the camera end.

[0058] The above settings have the following beneficial effects: ① During the operation of the testing equipment, various impurities or sharp protrusions may exist on the surface of the steel pipe 3, or accidental collisions may occur during the testing operation. The protective component 11 can directly block these factors that may damage the camera end and the lighting end, avoid problems such as scratches on the camera lens and breakage of the lighting cover, protect the core functional unit of the testing components from physical damage, and extend the service life of the equipment.

[0059] ② The production or storage environment of steel pipe 3 may contain pollutants such as dust and oil. Protective component 11 can prevent these pollutants from directly adhering to the camera end and the lighting end. Even if a small amount of pollutants adhere to the surface of protective component 11, it is easier to clean and maintain because of its position at the front of the equipment, and it is not as difficult to clean as pollutants directly adhering to the camera lens or lighting cover.

[0060] ③ In some special testing environments, there may be adverse factors such as high temperature, humidity, and corrosive gases. Protective component 11 can isolate the camera end and lighting end from these harsh environmental factors, reducing the impact of environmental factors on the testing components.

[0061] In this embodiment: the protective component 11 has a cleaning surface on the side facing away from the detection component. The cleaning surface is perpendicular to the sliding direction of the second workpiece 2. A cleaning plate 12 is provided on the cleaning surface. The cleaning plate 12 is movably connected to the first workpiece 1. A camera port 13 and an illumination port 14 are provided on the cleaning plate 12. When the camera port 13 coincides with the camera end and the lighting port 14 coincides with the lighting end, the cleaning plate 12 is in the first state. When the camera port 13 is offset from the camera end and the lighting port 14 is offset from the lighting end, the cleaning plate 12 is in the second state. By driving the cleaning plate 12 to generate displacement, the cleaning plate 12 can switch between the first state and the second state, and the protective plate can be cleaned during the switching process.

[0062] The cleaning plate 12 is movably connected to the first workpiece 1 and is driven to move under the action of external force. Since the sliding direction of the cleaning surface is perpendicular to that of the second workpiece 2, the surface of the cleaning plate 12 will rub against the cleaning surface of the protective member 11 when it moves. When the cleaning plate 12 is in the first state, the camera port 13 is aligned with the camera end and the lighting port 14 is aligned with the lighting end, and the camera assembly 4 and the lighting assembly 5 can work normally at this time. When the cleaning plate 12 is in the second state, that is, when the camera port 13 is misaligned with the camera end and the lighting port 14 is misaligned with the lighting end, the detection component is in a resting state and no detection work is performed at this time. When the cleaning plate 12 is driven to switch between the first state and the second state, the part of the protective member 11 that contacts the cleaning surface will scrape the cleaning surface, removing dust, stains and other impurities attached to the cleaning surface, thus realizing the cleaning function.

[0063] In this embodiment, the mounting tube 10 is provided with a drive structure for driving the cleaning plate 12 to rotate. The drive structure uses the sliding action of the second workpiece 2 to drive the cleaning plate 12 to rotate, thereby achieving effective cleaning of the cleaning surface of the protective component 11.

[0064] The drive structure includes a groove 15 formed on the outer wall of the mounting tube 10 and a rotating ring 16. The groove 15 is composed of a first groove 17, a second groove 18, and a connecting groove 19. The first groove 17 extends along a direction intersecting the length of the mounting tube 10, meaning the first groove 17 is inclined relative to the length of the mounting tube 10. Thus, when the drive column 20 slides inside the first groove 17, it generates a force that causes the rotating ring 16 to rotate. Specifically, when the drive column 20 slides inside the first groove 17, because the first groove 17 intersects the length of the mounting tube 10, the drive column 20 is subjected to a force component perpendicular to the length of the mounting tube 10. This force component causes the rotating ring 16 to rotate around the mounting tube 10.

[0065] The second groove 18 is located on the side of the first groove 17 closest to the steel pipe 3 and is arranged along the length of the mounting pipe 10. The main function of the second groove 18 is to provide a sliding channel for the drive column 20 when the second workpiece 2 drives the rotating ring 16 to move along the length of the mounting pipe 10. After the drive column 20 enters the second groove 18 from the first groove 17 through the connecting groove 19, it can move along the length of the mounting pipe 10 with the sliding of the second workpiece 2 under the constraint of the second groove 18 without rotation.

[0066] A connecting groove 19 is positioned between the first groove 17 and the second groove 18, connecting them into a continuous groove structure. The connecting groove 19 facilitates a smooth transition of the drive column 20 between the first groove 17 and the second groove 18. After the drive column 20 completes its rotation of the rotating ring 16 within the first groove 17, it needs to smoothly enter the second groove 18 via the connecting groove 19 to follow the movement of the second workpiece 2 along the length of the mounting tube 10. Conversely, when the drive column 20 moves to the appropriate position within the second groove 18 with the second workpiece 2, it can also return to the first groove 17 via the connecting groove 19, thus resetting the rotating ring 16.

[0067] The rotating ring 16 is slidably sleeved on the outside of the mounting tube 10, allowing it to move and rotate freely on the mounting tube 10. A drive post 20 is located inside the rotating ring 16, within a sliding groove 15. When the second workpiece 2 slides along the length of the mounting tube 10, it drives the rotating ring 16 to move synchronously, while the drive post 20 slides within the sliding groove 15. When the drive post 20 slides within the first groove 17, due to the special orientation of the first groove 17, the drive post 20 experiences a lateral force, which drives the rotating ring 16 to rotate relative to the mounting tube 10 and the second workpiece 2. The rotating ring 16 is fixedly connected to the cleaning plate 12, allowing the rotational motion of the rotating ring 16 to be directly transmitted to the cleaning plate 12, causing the cleaning plate 12 to rotate around the mounting tube 10, thereby wiping and cleaning the cleaning surface of the protective component 11. Meanwhile, the rotating ring 16 is movably connected to the second workpiece 2. This movable connection allows the second workpiece 2 to drive the rotating ring 16 to move without restricting the rotation of the rotating ring 16 under the action of the drive column 20, thus enabling the entire driving process to be completed smoothly.

[0068] Through the above design, the sliding motion of the second workpiece 2 during the inspection process can drive the cleaning plate 12 to rotate, thereby automatically completing the cleaning work on the cleaning surface of the protective part 11. No additional power source or complex control device is required. The structure is simple and reliable, greatly improving the automation level of the inspection equipment.

[0069] In this embodiment: a first mounting plate 21 is slidably sleeved on the outside of the mounting tube 10. The first mounting plate 21 is fixedly connected to the second workpiece 2. A second mounting plate 22 is inserted into the first mounting plate 21, and the insertion is a linear insertion. The camera assembly 4 and the lighting assembly 5 are both mounted on the second mounting plate 22. A magnetic locking structure 23 is provided between the first mounting plate 21 and the second mounting plate 22.

[0070] The first mounting plate 21 is slidably sleeved on the outside of the mounting tube 10, allowing it to slide linearly along the mounting tube 10. The first mounting plate 21 is fixedly connected to the second workpiece 2. When the second workpiece 2 moves, it will cause the first mounting plate 21 to slide synchronously on the mounting tube 10. The second mounting plate 22 is inserted into the first mounting plate 21, and the insertion method allows the second mounting plate 22 to be detached from the first mounting plate 21. The magnetic locking structure 23 fixes the first mounting plate 21 and the second mounting plate 22, but can also be separated under external force. When it is necessary to disassemble the camera assembly 4 and the lighting assembly 5, a certain external force is applied to overcome the magnetic attraction, allowing the second mounting plate 22 to move on the first mounting plate 21, so that the second mounting plate 22 is detached from the first mounting plate 21.

[0071] During installation, the camera assembly 4 and the lighting assembly 5 can be fixed to the second mounting plate 22 first, and then the second mounting plate 22 can be inserted into the first mounting plate 21 and fixed by the magnetic locking structure 23. During maintenance, if the camera assembly 4 or the lighting assembly 5 malfunctions, simply release the magnetic lock and remove the second mounting plate 22 from the first mounting plate 21 to easily repair or replace the faulty component without requiring a large-scale disassembly of the entire testing equipment.

[0072] Specifically, the magnetic locking structure 23 includes a first magnetic sheet and a second magnetic sheet with opposite magnetic poles, which are respectively fixed on the first mounting plate 21 and the second mounting plate 22.

[0073] Specifically, a connecting rod 24 is provided between the first mounting plate 21 and the second workpiece 2. One end of the connecting rod 24 is fixedly connected to the first mounting plate, and the other end is fixedly connected to the end of the second workpiece 2 near the steel pipe 3. A through hole 25 is provided on the rotating ring 16 for the connecting rod 24 to pass through. The through hole 25 is arc-shaped, and the center of the arc of the through hole 25 coincides with the center of the rotating ring 16. Two limiting plates 28 are provided on the connecting rod 24, and the two limiting plates 28 abut against the two sides of the rotating ring 16 respectively. With this configuration, when the second workpiece 2 moves, the connecting rod 24 can drive the first mounting plate 21 to move, thereby driving the second mounting plate 22 and the detection component to move. At the same time, the limiting plates 28 can drive the rotating ring 16 to move. When the rotating ring 16 rotates, the connecting rod 24 moves within the through hole 25 without causing interference.

[0074] In this embodiment: a limiting rod 26 is provided on the second mounting plate 22. The axis of the limiting rod 26 is perpendicular to the cleaning surface. An arc-shaped notch 27 is provided on the cleaning plate 12. The center of the arc of the arc-shaped notch 27 coincides with the rotation axis of the rotating ring 16. When the cleaning plate 12 changes from the second state to the first state, the limiting rod 26 gradually gets into the arc-shaped notch 27 to form a lock to restrict the movement of the second mounting plate 22.

[0075] When the cleaning plate 12 changes from the second state to the first state under the action of the driving structure, the cleaning plate 12 will rotate around the rotation axis of the rotating ring 16. During this process, since the position of the limiting rod 26 is fixed, as the cleaning plate 12 rotates, the limiting rod 26 will gradually approach the arc-shaped notch 27 and eventually gradually get into the arc-shaped notch 27. Because the center of the arc-shaped notch 27 coincides with the rotation axis of the rotating ring 16, when the limiting rod 26 gets into the arc-shaped notch 27, a locking relationship is formed between the two. To release this locking relationship, the cleaning plate 12 needs to be rotated in the opposite direction. However, in the second state, the cleaning plate 12 cannot rotate because the driving column 20 slides in the second groove 18. At the same time, since the insertion direction of the second mounting plate 22 and the first mounting plate 21 is a straight line, it intersects with the rotation direction of the cleaning plate 12. If the second mounting plate 22 slides relative to the first mounting plate 21, the arc-shaped notch 27 will restrict the limiting rod 26, thereby restricting the movement of the second mounting plate 22 relative to the first mounting plate 21.

[0076] The above settings have the following beneficial effects: ① During the testing process, the equipment may be affected by various external forces, such as vibration and collision. The engaging structure of the limiting rod 26 and the arc-shaped notch 27 can effectively prevent the second mounting plate 22 from moving unexpectedly under these external forces. Once the second mounting plate 22 moves, it may cause the camera assembly 4 and the lighting assembly 5 to shift, affecting the testing effect. However, through this engaging restriction, the positions of the camera assembly 4 and the lighting assembly 5 remain unchanged relative to the first mounting plate 21, so that the testing work of the testing equipment can be carried out stably.

[0077] ② The automatic engagement of the limiting rod 26 and the arc-shaped notch 27 eliminates the need for operators to manually fix the second mounting plate 22 during equipment operation. When the cleaning plate 12 changes state, the limiting rod 26 automatically engages and disengages from the arc-shaped notch 27, reducing the need for additional fixing of the second mounting plate 22, simplifying the operation process, and improving work efficiency.

[0078] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A surface defect detection device for seamless steel pipes, characterized in that, include: The first workpiece is capable of relative movement with the steel pipe along a first direction, and the first direction is consistent with the length direction of the steel pipe. The first workpiece includes a mounting base, and the mounting base has a mounting hole extending through it along the length direction of the steel pipe. The axis of the mounting hole is parallel to the first direction, and the steel pipe can pass through the mounting hole when it moves relative to the first workpiece along the first direction. Multiple mounting tubes are arranged inside the mounting hole, and the multiple mounting tubes are arranged sequentially along the circumference of the mounting hole. The end of the mounting tube facing away from the mounting hole extends toward the center of the mounting hole, and the side of the mounting tube facing the steel pipe is open. The second workpiece is slidably connected to the first workpiece, the sliding direction of the second workpiece intersects with the length direction of the steel pipe, and the end of the second workpiece near the steel pipe has an abutting end; The detection component includes a camera assembly and an illumination assembly, both of which are mounted on a second workpiece. A protective element, made of transparent material, is provided on the side of the detection component facing the steel pipe. This protective element has a mounting surface relative to the detection component, which is attached to the camera and illumination ends facing the steel pipe. A cleaning surface is provided on the side of the protective element facing away from the detection component. This cleaning surface is perpendicular to the sliding direction of the second workpiece, and a cleaning plate is provided on the cleaning surface. The cleaning plate is movably connected to a first workpiece and has a camera port and an illumination port. The driving component provides an elastic driving force to the second workpiece to drive the second workpiece to slide towards the steel pipe so that the abutting end abuts against the surface of the steel pipe. When the position of the steel pipe relative to the detection component changes, the driving component can adjust the second workpiece in a timely manner by means of elastic force so that the abutting end abuts against the surface of the steel pipe at all times. The mounting tube is provided with a drive structure for driving the cleaning disc to rotate. The drive structure includes a groove formed on the outer wall of the mounting tube, and the groove includes: The first groove extends along a direction intersecting the length of the mounting pipe; The second groove is located on the side of the first groove closer to the steel pipe, and the second groove is set along the length of the installation pipe; A connecting groove is provided between a first groove and a second groove, thereby connecting the first groove and the second groove into a continuous groove structure. The driving structure also includes a rotating ring, which is slidably sleeved on the outside of the mounting tube. A driving post is provided on the inner side of the rotating ring, and the driving post is located in a groove. When the driving post slides in the first groove, it can drive the rotating ring to rotate. The rotating ring is fixedly connected to the cleaning plate and movably connected to the second workpiece. When the second workpiece slides along the length of the mounting tube, it can drive the rotating ring to move synchronously. At the same time, the driving post slides in the groove, and when the driving post slides in the first groove, it can make the rotating ring rotate relative to the mounting tube and the second workpiece.

2. The surface defect detection equipment for seamless steel pipes according to claim 1, characterized in that: An elastic element is provided between the second workpiece and the first workpiece, and the elastic element is used to drive the second workpiece back to its original state when the driving component removes its driving force.

3. The surface defect detection equipment for seamless steel pipes according to claim 2, characterized in that: The driving component includes a magnetic block, which is a magnetized second workpiece. When the second workpiece approaches the steel pipe, it can move closer to the surface of the steel pipe under the attraction of the steel pipe so that the abutting end abuts against the surface of the steel pipe.

4. A surface defect detection device for seamless steel pipes according to any one of claims 1-3, characterized in that: The second workpiece is a rod-shaped structure. There are multiple second workpieces, and each second workpiece is inserted into each mounting tube in a one-to-one correspondence and is slidably connected to each mounting tube in a one-to-one correspondence.

5. The surface defect detection device for seamless steel pipes according to claim 4, characterized in that: The end of the camera component facing the steel pipe is the camera end, and the end of the lighting component facing the steel pipe is the lighting end. The camera end and the lighting end are on the same plane facing the steel pipe.

6. The surface defect detection device for seamless steel pipes according to claim 5, characterized in that: When the camera port and the camera end coincide, and the lighting port and the lighting end coincide, the cleaning plate is in the first state. When the camera port and the camera end are misaligned, and the lighting port and the lighting end are misaligned, the cleaning plate is in the second state. By driving the cleaning plate to generate displacement, the cleaning plate can switch between the first state and the second state, and the protective plate can be cleaned during the switching process.

7. The surface defect detection device for seamless steel pipes according to claim 6, characterized in that: The mounting tube is slidably fitted with a first mounting plate, which is fixedly connected to the second workpiece. A second mounting plate is inserted into the first mounting plate. The camera assembly and the lighting assembly are both mounted on the second mounting plate. A magnetic locking structure is provided between the first mounting plate and the second mounting plate.

8. The surface defect detection device for seamless steel pipes according to claim 7, characterized in that: The second mounting plate is provided with a limiting rod, the axis of which is perpendicular to the cleaning surface. The cleaning plate has an arc-shaped notch, the center of which coincides with the rotation axis of the rotating ring. As the cleaning plate changes from the second state to the first state, the limiting rod gradually engages with the arc-shaped notch to restrict the movement of the second mounting plate.

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