Steel pipe surface defect detection device

Abstract

The utility model relates to the technical field of pipe detection, in particular to an enhanced design of detection precision of a detection device. The utility model discloses a steel pipe surface defect detection device which can keep high-precision dynamic stability in the detection process, provide a clean detection environment and optimize the imaging precision of the steel pipe surface defect detection device. The detection device comprises a shell, an imaging assembly arranged in the shell and a clamping assembly used for clamping a steel pipe, and the shell is provided with a dustproof ring used for allowing the steel pipe to pass through. The clamping assembly comprises a downward pressing device moving in the vertical direction and a supporting roller arranged on a downward pressing path of the downward pressing device, and the supporting roller is used for supporting the bottom of the steel pipe and guiding the steel pipe to enter the shell through rolling movement.

Description

A steel pipe surface defect detection device Technical Field

[0001] This utility model relates to the field of pipe testing technology, and in particular to the design of an enhanced testing device to improve testing accuracy. Background Technology

[0002] The surface quality of steel pipes directly affects their performance and product grade. However, during production, various defects such as scratches, cracks, and dents are easily generated due to process environment and equipment factors. These defects can damage the appearance, create stress concentration points, and reduce material strength. Therefore, a grinding process is needed to restore geometric accuracy and surface finish. However, grinding may introduce new defects, thus forming a quality control process of "inspection-grinding-re-inspection": a surface defect detection device is used to identify residual defects and provide feedback to the secondary grinding process to ensure that the surface quality of the steel pipes meets the standards.

[0003] Chinese patent document CN113189114B discloses a device and method for detecting surface defects in steel pipes. The device uses a steel pipe support roller mechanism to position the steel pipe, and a clamping and rotating mechanism is mounted on the inner wall of the steel pipe to drive its rotation. This, combined with a camera movement control mechanism, enables full-axis scanning detection.

[0004] However, when the grinding and inspection processes share the same production line, existing technologies have significant drawbacks: Firstly, the aforementioned device achieves the rotation of the steel pipe by clamping one end inside. This rotation method, which relies solely on fixing one end, is prone to swaying and displacement of the steel pipe during rotation due to insufficient or uneven clamping force. Once the steel pipe sways, the camera struggles to maintain its stability during scanning, severely impacting image quality and potentially preventing the accurate capture of surface defects. Secondly, metal debris generated during grinding adheres to the steel pipe surface or drifts into the inspection area, contaminating the vision system lens and causing reflection interference under strong light sources. This interferes with the inspection device, preventing the generation of accurate inspection images. Summary of the Invention

[0005] The purpose of this invention is to provide a steel pipe surface defect detection device that can keep the steel pipe stable during the detection process, provide a clean detection environment, and improve imaging accuracy.

[0006] This utility model is achieved through the following technical solution: a steel pipe surface defect detection device, including a shell, an imaging component disposed inside the shell, and a clamping component for clamping the steel pipe. The shell is provided with a dustproof ring for the steel pipe to pass through. The clamping component includes a pressing device that moves in the vertical direction and a support roller disposed on the pressing path of the pressing device. The support roller is used to support the bottom of the steel pipe and guides the steel pipe into the shell through rolling motion.

[0007] The outer shell serves as the overall support frame and forms a closed inspection space. When the steel pipe passes through the dustproof ring, the clamping assembly, through the pressing device and support rollers, forms a vertical-horizontal composite clamping structure, restricting the vertical and horizontal swaying of the steel pipe and ensuring its stability during inspection. Furthermore, the support rollers allow the steel pipe to roll into the inspection space within the shell, preventing damage to the steel pipe's surface upon entry. The imaging assembly achieves 360° blind-spot-free scanning inspection of surface defects on the steel pipe. The dustproof ring, as an environmental isolation unit, allows the steel pipe to pass continuously while preventing external metal debris from entering the inspection area. Through its sealed structure, the dustproof ring dynamically adheres to the steel pipe, ensuring smooth passage while effectively blocking external dust intrusion, guaranteeing the cleanliness of the inspection environment for the imaging assembly. Furthermore, reduced dust within the inspection space improves the clamping stability of the assembly.

[0008] The pressing device and support rollers form a clamping space for holding the steel pipe, effectively preventing the pipe from shaking. This ensures that the reference position of the steel pipe remains consistent throughout the inspection process, preventing the grinding process on the same production line from affecting the steel pipe to be inspected, causing vibration and displacement, and thus improving the accuracy and reliability of the inspection, providing a solid foundation for subsequent defect analysis. The design of the outer shell and dustproof ring effectively isolates the surface of the steel pipe and the inspection area from metal debris generated during the grinding process. This not only protects the vision system lens of the imaging component from contamination and reduces lens blurring caused by debris adhesion or scattering, but also avoids reflection interference from debris under strong light sources, ensuring that the inspection device can generate clear and accurate inspection images.

[0009] Preferably, the housing has a fixing plate inside, the clamping assembly is mounted on one side of the fixing plate, and the imaging assembly is mounted on the other side of the fixing plate; the fixing plate has a connecting hole in the center.

[0010] The fixing plate serves as a supporting component for the steel pipe surface defect detection device. The clamping assembly is mounted on one side of the fixing plate, and the imaging assembly is mounted on the other side of the fixing plate. The center of the fixing plate has a connecting hole, which is used to fix the steel pipe through the clamping assembly. The connecting hole ensures the smooth transmission of the steel pipe during the detection process. The fixed steel pipe passes through the connecting hole and enters the other side of the imaging assembly on the fixing plate to start the detection process.

[0011] The fixing plate divides the detection device into two parts: one side is used to fix the steel pipe and the other side is used for photographic detection. This avoids the imaging component from collecting unnecessary information during detection and prevents the clamping component from obstructing the detection and causing blind spots.

[0012] Preferably, the rolling contact surface between the support roller and the steel pipe has a groove structure.

[0013] The groove structure allows the steel pipe to be more securely mounted on the support roller. This groove structure is designed according to the diameter range of common steel pipes, and its depth and width can be adapted to various specifications of steel pipes, so that the bottom of the steel pipe is just embedded in the groove. This ensures the stability of the steel pipe during testing, without increasing rolling resistance due to excessive restriction.

[0014] Preferably, the bottom of the support roller is connected to a wheel frame, which is detachably mounted on the fixing plate.

[0015] The support rollers are detachably fixed to the fixed plate via the roller frame, which facilitates the installation and removal of the support rollers. While ensuring the stability of the support rollers, it is convenient for operators to adjust the fixed position of the support rollers to adapt to steel pipes of different specifications.

[0016] Preferably, the wheel frame is equipped with an object proximity sensor.

[0017] The object proximity sensor uses inductive sensing. When the steel pipe enters its sensing range, it triggers the internal threshold detection module, outputting a steel pipe arrival signal to drive subsequent process operations, such as activating the pressing device to fix the steel pipe and opening the imaging component for detection. This shortens the steel pipe arrival detection response time and improves the detection start-up speed.

[0018] Preferably, the dustproof ring is provided with a fixing flange, which is fitted onto the mounting holes provided on the outer casing.

[0019] The dust seal ring is mechanically connected to the mounting holes of the housing via an integrally formed fixing flange. The fixing flange provides rigid support for the dust seal ring, ensuring it is securely mounted on the mounting holes of the housing.

[0020] Preferably, the dustproof ring has multiple flexible sealing structures evenly distributed around its center circumference.

[0021] Multiple flexible sealing structures are made of highly elastic polyurethane material. When the steel pipe passes through the center of the dustproof ring, the multiple flexible sealing structures increase the contact area between the dustproof ring and the surface of the steel pipe. This isolates metal debris on the surface of the steel pipe from the outside of the outer shell, preventing contaminants from entering the shell and improving the sealing performance of the device.

[0022] Preferably, the imaging components are provided in multiple ways and are arranged circumferentially on the fixing plate with the connecting hole as the center.

[0023] The imaging assembly employs a multi-unit layout design. Its core feature is the use of a connecting hole as a central reference point. Through precise mechanical positioning or assembly processes, multiple imaging components are evenly arranged circumferentially around this central hole, ensuring coverage of every aspect of the steel pipe to be inspected, allowing for 360° detection. The imaging components are mounted on the other side of a fixing plate, which distinguishes between the steel pipe fixing area and the steel pipe inspection area, making the device more compact.

[0024] Preferably, the imaging component includes a camera and a slide rail, with the camera slidably mounted on the slide rail, and the distance between the camera and the through hole changing by sliding on the slide rail.

[0025] The camera is slidably assembled with a slide rail via a high-precision slider or guide rail mechanism, ensuring smooth movement along a preset axis on the slide rail. The guide rail allows the camera to adjust its shooting position and focal length, enabling it to cover a larger shooting area and adapt to steel pipes of different sizes. Furthermore, the rigidity and locking mechanism of the slide rail ensure the structural stability of the camera when stationary, guaranteeing image quality.

[0026] Preferably, the device also includes a lighting device, which comprises an annular body and multiple lighting elements, the multiple lighting elements being evenly distributed along the annular surface of the annular body.

[0027] The lighting device ensures that the light can evenly cover the camera's field of view, ensuring that defects in the steel pipe can be accurately detected under the illumination of the lighting device, thus improving the detection accuracy.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] A steel pipe surface defect detection device forms a closed detection space through its outer shell, effectively blocking external metal debris and dust, ensuring the cleanliness of the imaging components, avoiding lens contamination and reflection interference, and improving the clarity and accuracy of the detected images. The flexible sealing structure of the dustproof ring dynamically fits the steel pipe, removing metal debris from the pipe surface while ensuring smooth passage, improving the sealing performance of the outer shell, extending the service life of the equipment, and preventing dust from affecting the clamping stability of the clamping components.

[0030] Furthermore, the pressing device and the support rollers form a dynamic clamping space, restricting the vertical and horizontal positions of the steel pipe and keeping it stable. This ensures a stable detection reference position and improves detection accuracy and reliability. By adjusting the positions of the pressing device and the support rollers, the device can be adapted to different specifications of steel pipes, enhancing its versatility and adaptability.

[0031] Furthermore, the fixing plate implements functional partitioning and optimizes the spatial layout, making the imaging component and clamping component work together more efficiently, and preventing the imaging component from collecting invalid information and the clamping component from creating blind spots in the detection of the steel pipe. Connecting holes ensure smooth transmission of the steel pipe, reducing downtime in the detection process and improving overall detection efficiency.

[0032] Furthermore, the detachable wheel frame improves the assembly efficiency and stability of the support rollers, reducing maintenance costs. Additionally, the detachable wheel frame allows for vertical adjustment of the support roller height, making it adaptable to steel pipes of different specifications and enhancing the flexibility and expandability of the device.

[0033] Furthermore, the object proximity sensor employs an inductive sensing principle. When the steel pipe enters its sensing range, it triggers the internal threshold detection module, outputting a steel pipe arrival signal to drive subsequent process operations, such as activating the pressing device to fix the steel pipe and opening the imaging component for detection. This shortens the steel pipe arrival detection response time and improves the detection startup speed.

[0034] Furthermore, the fixed flange provides rigid support for the dust ring, ensuring its secure mounting to the housing and improving the reliability of the sealing structure. The rigid support structure simplifies the installation process and reduces assembly errors.

[0035] Furthermore, the circumferentially distributed flexible sealing structure increases the contact area with the steel pipe, improving sealing performance and effectively blocking metal debris and dust. The highly elastic material adapts to the slight deformation of the steel pipe, ensuring sealing stability during long-term use.

[0036] Furthermore, multiple imaging components are arranged circumferentially around the connecting hole to achieve 360° blind-spot-free inspection of the steel pipe, improving the defect detection rate. The compact layout optimizes space utilization, reduces equipment size, and lowers manufacturing costs.

[0037] Furthermore, the annular structure and multiple lighting elements mounted on its surface optimize the light incidence angle, reduce surface reflection and shadow interference from the target object, and improve image contrast and clarity. The multiple lighting elements within the annular structure enable the lighting device to provide omnidirectional illumination of the steel pipe.

[0038] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] Figure 1 is a schematic diagram of the outer shell of this utility model;

[0041] Figure 2 is a schematic diagram of the installation of the dustproof ring of this utility model;

[0042] Figure 3 is a schematic diagram of the internal structure of the outer shell of this utility model;

[0043] Figure 4 is a schematic diagram of the clamping assembly of this utility model;

[0044] Figure 5 is a schematic diagram of the imaging component of this utility model;

[0045] The annotations in the attached figures are explained as follows:

[0046] 1. Housing, 10. Mounting hole, 2. Clamping assembly, 3. Imaging assembly, 4. Illumination device, 12. Dustproof ring, 121. Fixing flange, 122. Flexible sealing structure, 11. Fixing plate, 111. Connecting hole, 21. Pressing device, 211. Drive cylinder, 22. Support roller, 23. Object proximity sensor, 24. Wheel frame, 241. Horizontal bracket, 242. Vertical fixing component, 243. Detachable limiting component, 221. Rotating roller shaft, 31. Camera, 32. Slide rail, 41. Ring, 42. Detailed Implementation

[0047] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0048] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] As shown in Figures 1 to 5, a steel pipe surface defect detection device includes a housing 1, a clamping assembly 2, and an imaging assembly 3. The housing 1 serves as an overall support frame, and its interior is divided into functional areas by a fixing plate 11. One side is used to install the clamping assembly 2, and the other side is used to install the imaging assembly 3. A dustproof ring 12 is provided on the housing 1, and the steel pipe passes through the center of the dustproof ring 12 into the interior of the detection device.

[0050] Furthermore, the outer casing 1 is a cube composed of a bottom plate, four side plates, and a top plate, which is fixed by multiple bolts and nuts to facilitate the installation and disassembly of the detection device. Additionally, the center of the fixing plate 11 has a connecting hole 111 for the passage of a steel pipe. After the steel pipe passes through the connecting hole 111 to the detection position, it is fixed by the clamping assembly 2 on one side of the fixing plate 11, and the surface of the steel pipe is detected by the imaging assembly 3 on the other side of the fixing plate 11.

[0051] The clamping assembly 2 includes a pressing device 21 and a support roller 22, which work together to form a dynamic clamping space for securely clamping the steel pipe. The pressing device 21 is positioned perpendicular to the bottom plate of the outer casing 1, and a drive cylinder 211 is mounted on its upper end. The drive cylinder 211 drives the pressing device 21 to move vertically. The pressing device 21, through the drive cylinder 211 and the support roller 22, forms a dynamic clamping space. The linear drive characteristic of the drive cylinder 211 enables rapid clamping and release of the steel pipe, making the inspection process smoother and improving work efficiency.

[0052] The drive cylinder 211 is mounted above the connecting hole 111. When the steel pipe is transported to the designated position, the drive cylinder 211 drives the pressing device 21 to move downward. Together with the support roller 22, it restricts the axial and radial sway of the steel pipe and ensures the stability of the steel pipe during the inspection process.

[0053] The support roller 22 is set parallel to the bottom plate of the outer shell 1. The bottom of the support roller 22 is provided with a wheel frame 24. The wheel frame 24 is detachably mounted on the fixed plate 11. The wheel frame 24 includes a horizontal bracket 241 and a vertical fixing member 242 detachably mounted on the fixed plate 11. The horizontal bracket 241 is connected to the upper end of the vertical fixing member 242, which improves the stability of the support roller 22. By changing the assembly position of the vertical fixing member 242, the height position of the support roller 22 can be moved, so that the support roller 22 can be adapted to steel pipes of different specifications.

[0054] Furthermore, the rolling contact surface between the support roller 22 and the steel pipe has a groove structure. The groove structure allows the steel pipe to be more securely mounted on the support roller. This groove structure is designed according to the diameter range of common steel pipes, and its depth and width can accommodate various specifications of steel pipes, so that the bottom of the steel pipe is just embedded in the groove, which not only ensures the stability of the steel pipe during testing, but also avoids increasing rolling resistance due to excessive restriction.

[0055] A detachable limiting component 243 is assembled between the vertical fixing component 242 and the fixing plate 11. By installing the detachable limiting component 243, the installation and disassembly efficiency of the vertical fixing component 242 is improved. The detachable limiting component 243 restricts the horizontal installation position of the vertical fixing component 242, so that the vertical fixing component 242 and the pressing device 21 are in the same vertical direction, ensuring that the clamping assembly 2 can accurately fix the steel pipe.

[0056] The support roller 22 has rotating roller shafts 221 at both ends, which are rotatably connected to the horizontal support 241. Specifically, the support roller 22 has rotating roller shafts 221 at both ends, connected to the horizontal support 241, allowing the support roller 22 to rotate around the rotating roller shafts 221. When the steel pipe passes through, the support roller 22 rotates around the rotating roller shafts 221, reducing the friction between the steel pipe and the support roller 22, extending the service life of the support roller 22, improving the transmission efficiency of the steel pipe, and preventing scratches on the surface of the steel pipe during transmission. When the steel pipe passes through, the support roller 22 rotates around the rotating roller shafts 221, reducing the friction of the steel pipe passing through the support roller 22, improving the detection efficiency. When the steel pipe needs to be fixed for detection, the pressing device 21 fixes the steel pipe on the support roller 22 and keeps it stationary.

[0057] An object proximity sensor 23 is installed on the horizontal support 241 to detect whether the steel pipe is in place. The object proximity sensor 23 adopts the principle of inductive sensing. When the steel pipe is transmitted to its sensing range, it triggers the internal threshold detection module, outputs a steel pipe arrival signal, and drives subsequent process operations, such as starting the pressing device 21 to fix the steel pipe and opening the imaging component 3 for detection. This shortens the steel pipe arrival detection response time and improves the detection start speed.

[0058] The dustproof ring 12 is equipped with a fixing flange 121, which is used to mount the housing 1 to the mounting hole 10. Multiple flexible sealing structures 122, made of highly elastic polyurethane material, are evenly distributed around the center of the dustproof ring 12. When a steel pipe passes through the dustproof ring 12, the flexible sealing structures 122 dynamically adhere to the surface of the steel pipe, effectively preventing external metal debris and dust from entering the detection area, ensuring the cleanliness of the detection environment for the imaging component 3. The flexible sealing structures 122 of the dustproof ring 12 effectively block external contaminants, protecting the vision system lens of the imaging component 3 from contamination.

[0059] Multiple imaging components 3 are arranged circumferentially around the connecting hole 111 on the other side of the fixed plate 11. Each imaging component 3 includes a camera 31 and a slide rail 32. The camera 31 is slidably mounted on the slide rail 32, which is radially distributed around the connecting hole 111. The camera 31 can move smoothly along a preset axis. By sliding on the slide rail 32, the distance between the camera 31 and the connecting hole 111 is changed, thereby adjusting the shooting position and focal length to cover a larger shooting area and adapt to steel pipes of different specifications. The rigidity and locking mechanism of the slide rail 32 ensure the structural stability of the camera 31 in a static state, guaranteeing image quality.

[0060] Multiple illumination devices 4 are mounted inside the housing 1 on the side of the fixing plate 11 near the imaging assembly 3. Each illumination device 4 includes an annular body and multiple illumination elements 42. The illumination elements 42 are evenly distributed along the annular surface of the annular body 41. The multiple illumination elements 42 on the surface of the annular body 41 provide uniform illumination, covering the field of view of the camera 31, ensuring that surface defects of the steel pipe can be accurately detected, and improving detection accuracy. The multiple illumination elements inside the annular body provide uniform illumination, optimize the light incident angle, reduce surface reflection and shadow interference of the target object, and improve imaging contrast and clarity, thereby improving detection accuracy.

[0061] By adjusting the assembly positions of the pressing device 21 and the support roller 22, this device can be adapted to steel pipes of different specifications and sizes. Meanwhile, the detachable limiting component 243 and the horizontal bracket 241 make the vertical position adjustment of the support roller 22 more convenient, improving the versatility and adaptability of the device.

[0062] Steel pipe clamping and inspection process:

[0063] Step 1: The steel pipe passes through the center of the dustproof ring 12 and enters the testing device.

[0064] Step 2: The steel pipe is transported along the support roller 22. When it is transported to the sensing range of the object proximity sensor 23, the object proximity sensor 23 outputs a steel pipe positioning signal.

[0065] Step 3: Drive cylinder 211 drives pressing device 21 to move downward, working together with support roller 22 to firmly clamp the steel pipe and limit its axial movement and radial sway.

[0066] Step 4: Imaging component 3 is activated, and camera 31 moves along slide rail 32 to perform 360° blind-spot-free scanning detection on the surface of the steel pipe.

[0067] Step 5: After the test is completed, the drive cylinder 211 drives the pressing device 21 to move upward, releasing the steel pipe. The steel pipe continues to be transported along the support roller 22 and leaves the test device.

[0068] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A steel pipe surface defect detection device, comprising a housing (1), an imaging component (3) disposed within the housing (1), and a clamping component (2) for clamping the steel pipe, characterized in that, The outer shell (1) is provided with a dustproof ring (12) for the passage of steel pipe; the clamping assembly (2) includes a pressing device (21) that moves in the vertical direction and a support roller (22) provided on the pressing path of the pressing device (21). The support roller (22) is used to support the bottom of the steel pipe and guides the steel pipe into the interior of the outer shell (1) by rolling motion.

2. The steel pipe surface defect detection device according to claim 1, characterized in that, The housing (1) is provided with a fixing plate (11), the clamping assembly (2) is assembled on one side of the fixing plate (11), and the imaging assembly (3) is assembled on the other side of the fixing plate (11); the fixing plate (11) has a connecting hole (111) in the center.

3. The steel pipe surface defect detection device according to claim 2, characterized in that, The rolling contact surface between the support roller (22) and the steel pipe has a groove structure.

4. The steel pipe surface defect detection device according to claim 2, characterized in that, The bottom of the support roller (22) is connected to a wheel frame (24), which is detachably mounted on the fixing plate (11).

5. The steel pipe surface defect detection device according to claim 4, characterized in that, The wheel frame (24) is equipped with an object proximity sensor (23).

6. The steel pipe surface defect detection device according to claim 1, characterized in that, The dustproof ring (12) is provided with a fixing flange (121), which is assembled on the mounting hole (10) provided on the outer shell (1).

7. The steel pipe surface defect detection device according to claim 1, characterized in that, The dustproof ring (12) has multiple flexible sealing structures (122) evenly distributed around its center.

8. The steel pipe surface defect detection device according to claim 3, characterized in that, The imaging component (3) is provided in multiple ways and is arranged circumferentially on the fixing plate (11) with the connecting hole (111) as the center.

9. A steel pipe surface defect detection device according to claim 8, characterized in that, The imaging component (3) includes a camera (31) and a slide rail (32). The camera (31) is slidably mounted on the slide rail (32). The distance between the camera (31) and the connecting hole (111) is changed by sliding on the slide rail (32).

10. A steel pipe surface defect detection device according to claim 1, characterized in that, It also includes a lighting device (4), which includes an annular body (41) and a plurality of lighting elements (42), the plurality of lighting elements (42) being uniformly arranged along the annular surface of the annular body (41).

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