A round steel pipe weld nondestructive flaw detection inspection device

Abstract

The utility model discloses a kind of round steel pipe weld nondestructive flaw detection inspection devices, including conveying component, the conveying component is symmetrically set before and after, further include detection device;Auxiliary detection device: it includes guide component, detection ring and positioning assembly, the guide component is respectively set between two conveying components, the detection ring is set between two guide components, the left end of detection ring is equipped with weld detection component, the positioning assembly includes positioning bin, sliding hole, positioning column and screw rod, the screw rod is screw thread connection in the upper side arc wall of detection ring, the lower end of screw rod is rotatably connected in the upper side of positioning bin, the lower side wall of positioning bin is equipped with sliding hole, positioning column is slidably connected in the inside of sliding hole, the conveying component is electric conveying belt, the round steel pipe weld nondestructive flaw detection inspection device, through the cooperation of guide component, positioning assembly and weld detection component can realize the automatic positioning of round steel pipe weld.

Description

Technical Field

[0001] This utility model relates to the field of circular steel pipe weld inspection technology, specifically a non-destructive testing device for circular steel pipe welds. Background Technology

[0002] In the fields of oil, natural gas, chemical industry and urban pipeline network, circular steel pipe transportation is a key material transportation method. Its safety and stability are directly related to industrial production and people's livelihood. As the core part of the circular steel pipe connection, the quality of the weld seam directly affects the sealing and structural strength of the entire circular steel pipe system. Once there are defects such as cracks, porosity, and undercut, it may cause serious safety accidents such as leakage and explosion. Therefore, the flaw detection inspection of the weld seam of circular steel pipe has important engineering significance.

[0003] Currently, various methods have been developed for inspecting weld seams of circular steel pipes. Common inspection methods include manual visual inspection, where inspectors directly observe the weld surface using tools such as magnifying glasses; ultrasonic testing, which utilizes the propagation characteristics of ultrasound in different media to identify defects by receiving reflected echoes; and radiographic testing, which uses X-rays or gamma rays to penetrate the weld seam and present defect images based on differences in film sensitivity. These technologies have achieved weld seam inspection to a certain extent, and some have formed relatively mature operating procedures and equipment systems. However, existing technologies generally lack precise positioning of circular steel pipe weld seams, usually requiring manual alignment of the weld seam with the inspection area, which limits the inspection accuracy. Therefore, we propose a non-destructive testing device for circular steel pipe weld seams. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a non-destructive testing device for circular steel pipe welds. Through the automatic positioning of the circular steel pipe weld by the guide component, positioning component and weld detection component, the problems in the background technology can be effectively solved.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-destructive testing device for weld seams of circular steel pipes, comprising a conveying assembly symmetrically arranged at the front and rear, and a detection device;

[0006] Auxiliary detection device: It includes a guide assembly, a detection ring, and a positioning assembly. The guide assembly is respectively disposed between two conveying assemblies, and the detection ring is disposed between two guide assemblies. A weld detection assembly is provided at the left end of the detection ring. The positioning assembly includes a positioning chamber, a sliding hole, a positioning post, and a screw. The screw is threaded to the upper arc wall of the detection ring. The lower end of the screw is rotatably connected to the upper side of the positioning chamber. A sliding hole is provided on the lower side wall of the positioning chamber, and a positioning post is slidably connected inside the sliding hole. Through the cooperation of the guide assembly, the positioning assembly, and the weld detection assembly, automatic positioning of the weld seam of the circular steel pipe can be achieved.

[0007] Furthermore, the conveying component is an electric conveyor belt, and the surface of the electric conveyor belt is provided with uniformly distributed rubber V-shaped blocks. A control cabinet is provided on the front side of the electric conveyor belt, and a microcontroller is provided on the front side of the control cabinet. The input end of the microcontroller is electrically connected to an external power supply, and the input end of the electric conveyor belt is electrically connected to the output end of the microcontroller. A display is provided on the front side of the control cabinet, and the display is bidirectionally electrically connected to the microcontroller to ensure stable control and stable conveying of the circular steel pipe.

[0008] Furthermore, the positioning component also includes a pressure sensor, a limiting plate, and a spring. The pressure sensor is disposed on the top wall of the positioning chamber, and the upper end of the positioning column is configured to cooperate with the pressure sensor. The limiting plate is disposed in the middle of the positioning column, and a spring is provided between the upper side of the limiting plate and the top wall of the positioning chamber. The pressure sensor is bidirectionally electrically connected to the microcontroller and is used to locate the position of the weld.

[0009] Furthermore, the positioning component also includes guide holes and guide posts. The upper end of the outer arc surface of the detection ring is provided with symmetrically distributed guide holes, and the guide posts are respectively set at the left and right ends of the positioning chamber. The upper end of each guide post is slidably connected to the guide hole adjacent to the upper side to provide sliding guidance.

[0010] Furthermore, the guiding assembly includes a guide frame, a mounting platform, a bottom guide ball, a mounting column, and side guide balls. The guide frame is respectively disposed between two electric conveyor belts and is located on the left and right sides of the detection ring. The mounting platform is fixedly connected between the front and rear ends of the upper side of the guide frame. The bottom guide ball is rotatably connected inside the mounting platform. The mounting column is rotatably connected to the front and rear ends of the upper part of the mounting platform. The upper end of the mounting column is rotatably connected to the side guide ball, which can provide stable conveying for the circular steel pipe.

[0011] Furthermore, the guide assembly also includes adjusting columns, adjusting frames, pins, and electric cylinders. The adjusting columns are slidably connected to the adjusting holes on the lower side wall of the guide frame. The upper end of each adjusting column is provided with symmetrically distributed adjusting frames. The pins are respectively set on the plane at the lower end of the mounting column. The outer ends of the two pins facing away from each other are located inside the horizontally adjacent adjusting frames. The lower end of each guide frame is provided with an electric cylinder. The telescopic end of the electric cylinder is fixedly connected to the lower end of the upper adjacent adjusting column, which facilitates the adjustment of the guide assembly according to the diameter of the circular steel pipe.

[0012] Furthermore, the weld inspection component is a line laser profile sensor, which is located at the left end of the outer arc surface of the inspection ring. The line laser profile sensor is bidirectionally electrically connected to the microcontroller and is used for weld inspection.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This non-destructive testing device for circular steel pipe welds has the following advantages:

[0014] This non-destructive testing device for circular steel pipe welds uses a three-dimensional guiding structure formed by the bottom and side guide balls of the guiding assembly to ensure the smooth passage of the circular steel pipe through the inspection ring. The positioning column in the positioning assembly, in conjunction with the pressure sensor, can accurately locate the weld position. Springs and limit plates ensure close contact between the positioning column and the surface of the circular steel pipe. The design of the screw, guide hole, and guide column facilitates adjustment of the positioning chamber height to accommodate circular steel pipes of different diameters. A line laser profile sensor emits a laser to scan the weld and generate three-dimensional data. The microcontroller compares the data with a standard model to analyze defects, and the detection results are displayed in real time on a monitor, achieving accurate detection of weld defects in circular steel pipes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the guide component of this utility model;

[0017] Figure 3 This is a partial structural schematic diagram of the detection ring of this utility model;

[0018] Figure 4 This is an enlarged structural schematic diagram of point A of this utility model;

[0019] Figure 5 This is a partial structural schematic diagram of the positioning component of this utility model.

[0020] In the diagram: 1 Electric conveyor belt, 101 Rubber V-block, 2 Auxiliary detection device, 21 Guide assembly, 211 Guide frame, 212 Mounting platform, 213 Bottom guide ball, 214 Mounting column, 215 Side guide ball, 216 Adjusting column, 217 Adjusting frame, 218 Pin, 219 Electric cylinder, 22 Detection ring, 23 Positioning assembly, 231 Positioning chamber, 232 Pressure sensor, 233 Sliding hole, 234 Positioning column, 235 Limiting piece, 236 Spring, 237 Guide hole, 238 Guide column, 239 Screw, 3 Display, 4 Microcontroller, 5 Line laser profile sensor. 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 embodiment provides a technical solution: a non-destructive testing device for weld seams of circular steel pipes, including a conveying assembly, which is symmetrically arranged at the front and rear. The conveying assembly is an electric conveyor belt 1. The surface of the electric conveyor belt 1 is provided with uniformly distributed rubber V-shaped blocks 101. A control cabinet is provided on the front side of the electric conveyor belt 1. A microcontroller 4 is provided on the front side of the control cabinet. The input end of the microcontroller 4 is electrically connected to an external power source. The input end of the electric conveyor belt 1 is electrically connected to the output end of the microcontroller 4. A display 3 is provided on the front side of the control cabinet. The display 3 is bidirectionally electrically connected to the microcontroller 4. The device also includes a detection device 2.

[0023] Auxiliary detection device 2: It includes a guide assembly 21, a detection ring 22, and a positioning assembly 23. The guide assembly 21 is respectively disposed between two conveying assemblies, and the detection ring 22 is disposed between two guide assemblies 21. The guide assembly 21 includes a guide frame 211, a mounting platform 212, a bottom guide ball 213, a mounting column 214, and a side guide ball 215. The guide frame 211 is respectively disposed between two electric conveyor belts 1, and the guide frame 211 is located on the left and right sides of the detection ring 22. The mounting platform 212 is fixedly connected between the front and rear ends of the upper side of the guide frame 211. The bottom guide ball 213 is rotatably connected inside the mounting platform 212. The mounting column 214 is rotatably connected to the front and rear ends of the upper end of the mounting platform 212. The upper end of the mounting column 214 is rotatably connected to the front and rear ends of the upper end of the mounting platform 212. The guide assembly 21 is connected to a side guide ball 215. It also includes an adjusting column 216, an adjusting frame 217, a pin 218, and an electric cylinder 219. The adjusting columns 216 are slidably connected to the adjusting holes on the lower side wall of the guide frame 211. Symmetrically distributed adjusting frames 217 are provided at the upper ends of the adjusting columns 216. The pins 218 are respectively located on the plane at the lower end of the mounting column 214. The opposite outer ends of the two pins 218 are located inside the laterally adjacent adjusting frames 217. Electric cylinders 219 are provided at the lower ends of the guide frames 211. The telescopic ends of the electric cylinders 219 are fixedly connected to the lower ends of the upper adjacent adjusting columns 216. A weld detection assembly, a line laser profile sensor 5, is provided at the left end of the detection ring 22. The line laser profile sensor 5 is located at the detection... At the left end of the outer arc surface of ring 22, the line laser contour sensor 5 is bidirectionally electrically connected to the microcontroller 4. The positioning assembly 23 includes a positioning chamber 231, a sliding hole 233, a positioning post 234, and a screw 239. The screw 239 is threadedly connected to the upper arc wall of the detection ring 22. The lower end of the screw 239 is rotatably connected to the upper side of the positioning chamber 231. (A sealing plate is fixedly connected between two guide posts 238. A rotating post is rotatably connected to the middle of the sealing plate through a sealing bearing. The center of the upper end face of the screw 239 is fixedly connected to the lower side of the rotating post, and the screw 239 is located below the sealing bearing. Corrugated pipes are provided between the lower side of the sealing plate and the upper side of the outer arc surface of the detection ring 22, and between the upper side of the inner arc surface of the detection ring 22 and the upper side of the positioning chamber 231.) The threaded portion is located inside the bellows, which provides external protection to prevent external dust from entering the threaded gaps of the screw 239. The positioning chamber 231 is located inside the upper end of the detection ring 22. A sliding hole 233 is provided on the lower side wall of the positioning chamber 231, and a positioning post 234 is slidably connected inside the sliding hole 233. The positioning assembly 23 also includes a pressure sensor 232, a limiting plate 235, and a spring 236. The pressure sensor 232 is located on the top wall of the positioning chamber 231. The upper end of the positioning post 234 is configured to cooperate with the pressure sensor 232. The limiting plate 235 is located in the middle of the positioning post 234. A spring 236 is provided between the upper side of the limiting plate 235 and the top wall of the positioning chamber 231. (A replacement plate is threadedly connected to the lower side wall of the positioning chamber 231.)The sliding hole 233 is located in the middle of the replacement plate. The spring 236 may age over time. In this case, the worker unscrews the replacement plate, removes the entire assembly consisting of the positioning post 234 and the limiting piece 235, then places a new spring 236 on the upper end of the positioning post 234, and inserts the lower end of the positioning post 234 into the sliding hole 233 in the middle of the replacement plate. The replacement plate is then screwed back into the lower side wall of the positioning chamber 231. The pressure sensor 232 is bidirectionally electrically connected to the microcontroller 4. The positioning assembly 23 also includes a guide hole 237 and a guide post 238, and a detection ring 22. Symmetrically distributed guide holes 237 are provided on the upper end of the outer arc surface. Guide posts 238 are respectively set at the left and right ends of the positioning chamber 231. The upper ends of the guide posts 238 are slidably connected to the adjacent guide holes 237 on the upper side. The circular steel pipe that needs to be inspected for weld flaws is placed inside the V-shaped block 101 on the electric conveyor belt 1. The microcontroller 4 controls the electric conveyor belt 1 to start. The rubber V-shaped block 101 transmits the circular steel pipe through friction and prevents it from deviating. When the rear end of the circular steel pipe is exposed, it first contacts the bottom guide ball 213. The worker operates the microcontroller 4 to activate the electric cylinder 219. The operation drives the adjusting column 216, adjusting frame 217, pin 218, and mounting column 214 to move, causing the side guide ball 215 to contact the circular steel pipe. The bottom guide ball 213 and the side guide ball 215 form a three-dimensional guiding structure. When the rear end of the circular steel pipe moves to the lower side of the positioning column 234, the microcontroller 4 controls the electric conveyor belt 1 to stop. The worker rotates the screw 239, adjusting the positioning chamber 231 to move up and down under the constraint of the guide hole 237 and the guide column 238, so that the lower end of the positioning column 234 contacts the outer arc surface of the circular steel pipe. The pressure sensor 232 detects the pressure. The force is fed back to the microcontroller 4 for recording. Then, the electric conveyor belt 1 continues to start. During the conveying of the circular steel pipe, the positioning column 234 experiences significant displacement due to the unevenness of the weld. The pressure sensor 232 detects the pressure change. The microcontroller 4 compares the data to determine the weld position and stops the conveyor belt. The line laser profile sensor 5 emits a laser to scan the weld and form three-dimensional data. The microcontroller 4 compares the data with a standard model to analyze defects. The detection results are displayed on the monitor 3. After completion, the electric conveyor belt 1 is restarted to continue conveying the circular steel pipe, facilitating the detection of weld defects in the circular steel pipe.

[0024] The working principle of the non-destructive testing device for weld seams of circular steel pipes provided by this utility model is as follows: First, the circular steel pipe to be inspected for weld seams is placed inside the V-shaped block 101 on the front electric conveyor belt 1. The electric conveyor belt 1 is started under the control of the microcontroller 4. The rubber V-shaped block 101 on its surface supports and transports the circular steel pipe through friction. The design of the V-shaped block can prevent the circular steel pipe from rolling off course, ensuring that the axis of the circular steel pipe can be detected inside the inspection ring 22. When the rear end of the circular steel pipe moves to the rear end of the front electric conveyor belt 1 and a part of it is exposed, the outer arc surface of the circular steel pipe first contacts the outer arc surface of the bottom guide ball 213 on the front side. Then, the worker operates the microcontroller 4 to make the electric cylinder 219 operate. The extension end of the electric cylinder 219 drives the adjustment Column 216 slides within the adjustment hole of guide frame 211. Column 216 drives adjustment frame 217 to move, pushing mounting column 214 to rotate via pin 218. The upper ends of mounting columns 214 move away from or closer to each other, causing side guide balls 215 to also contact the circular steel pipe. Bottom guide ball 213 supports the bottom of the circular steel pipe, and side guide balls 215 restrict the lateral displacement of the circular steel pipe, forming a three-dimensional guiding structure to ensure the circular steel pipe smoothly passes through detection ring 22. When the rear end of the circular steel pipe moves to the lower side of positioning column 234, the worker operates microcontroller 4 to stop electric conveyor belt 1. At this time, the circular steel pipe stops moving. Subsequently, the worker adjusts the position of positioning column 234 according to the diameter of the circular steel pipe. The worker rotates the rotating column fixedly connected to the upper end of screw 239. 39 rotates, moving up and down in the engagement of the thread. At this time, the positioning chamber 231 moves up and down restricted by the rotation of the guide hole 237 and the guide post 238. The guide post 238 slides along the inner wall of the adjacent guide hole 237. During this process, the lower end of the screw 239 maintains a rotational relationship with the upper side wall of the positioning chamber 231. As the positioning chamber 231 moves up and down, the positioning post 234 also moves accordingly. The worker needs to adjust the positioning post 234 so that its lower end contacts the outer arc surface of the circular steel tube (a rolling ball is installed at the lower end of the positioning post 234, and the ball contacts the outer arc surface of the circular steel tube to reduce the impact of friction on the outer arc surface of the circular steel tube). At this time, the worker operates the microcontroller 4 to open the pressure sensor 232. The pressure sensor 232 detects the pressure from the upper end of the positioning post 234 and feeds it back to the microcontroller 4. The microcontroller 4 records this value, which represents the arc surface of the circular steel pipe. Subsequently, the microcontroller 4 starts the electric conveyor belt 1, and the circular steel pipe continues to be conveyed backward. The upper end of the outer arc surface of the circular steel pipe slides along the lower end of the positioning post 234. Because the outer arc surface of the circular steel pipe is relatively smooth, the displacement of the positioning post 234 is small, so the pressure amplitude change of the pressure sensor 232 is small. As the circular steel pipe continues to be conveyed backward, the rear end of the circular steel pipe will be guided by the rear guide component 21 and enter the V-block 101 on the electric conveyor belt 1. During this process, the pressure sensor 232 monitors the pressure value transmitted by the positioning post 234 in real time and feeds the data back to the microcontroller 4.When the weld seam area of ​​the circular steel pipe moves to the lower end of the positioning post 234, the positioning post 234 is affected by the unevenness of the weld seam (in the case of concavity, the spring 236 pushes the positioning post 234 downward through the limiting piece 235; in the case of convexity, the ball at the lower end of the positioning post 234 drives the positioning post 234 upward). The positioning post 234 will have a relatively significant displacement, so the pressure sensor 232 detects that the pressure from the upper end of the positioning post 234 will also change accordingly. At this time, the microcontroller 4 receives this change and compares it with the previously recorded value of the arc surface of the circular steel pipe. If the value shows a significant change, this point is the weld seam area of ​​the circular steel pipe. At this time, the microcontroller 4 controls the electric conveyor belt 1 to stop operating, the circular steel pipe stops moving, and the line laser profile sensor 5 is installed at the left end of the detection ring 22. The laser beam emitted by the sensor forms a profile light band on the surface of the weld of the circular steel pipe. The line laser profile sensor 5 receives the reflected light and converts it into three-dimensional profile data. The microcontroller 4 receives the profile data from the line laser sensor 5 and compares it with the preset standard weld model to analyze whether there are defects such as undercut, porosity, and cracks. The detection results are displayed in real time on the display 3. The worker judges whether there are defects in the weld of the circular steel pipe through the display on the display 3. After the detection is completed, the electric conveyor belt 1 is started to continue transporting the circular steel pipe.

[0025] It is worth noting that the electric conveyor belt 1 disclosed in the above embodiments can be a conventional belt-type electric conveyor belt, the electric cylinder 219 can be an SMC electric cylinder, the pressure sensor 232 can be a model HX711, the display 3 can be a TFT-LCD display screen, the microcontroller 4 can be an STM32F407 series, and the line laser profile sensor 5 can be an LJ-V7000 series. The microcontroller 4 controls the operation of the electric cylinder 219, the pressure sensor 232, the display 3, the microcontroller 4, and the line laser profile sensor 5 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A non-destructive testing device for weld seams of circular steel pipes, comprising a conveying assembly symmetrically arranged front and rear, characterized in that: It also includes a detection device (2); Auxiliary detection device (2): It includes a guide assembly (21), a detection ring (22) and a positioning assembly (23). The guide assembly (21) is respectively disposed between two conveying assemblies. The detection ring (22) is disposed between two guide assemblies (21). A weld detection assembly is provided at the left end of the detection ring (22). The positioning assembly (23) includes a positioning chamber (231), a sliding hole (233), a positioning post (234) and a screw (239). The screw (239) is threaded to the upper arc wall of the detection ring (22). The lower end of the screw (239) is rotatably connected to the upper side of the positioning chamber (231). A sliding hole (233) is opened on the lower side wall of the positioning chamber (231). The positioning post (234) is slidably connected inside the sliding hole (233).

2. The non-destructive testing device for weld seams of circular steel pipes according to claim 1, characterized in that: The conveying component is an electric conveyor belt (1). The surface of the electric conveyor belt (1) is provided with uniformly distributed rubber V-shaped blocks (101). A control cabinet is provided on the front side of the electric conveyor belt (1). A microcontroller (4) is provided on the front side of the control cabinet. The input end of the microcontroller (4) is electrically connected to an external power source. The input end of the electric conveyor belt (1) is electrically connected to the output end of the microcontroller (4). A display (3) is provided on the front side of the control cabinet. The display (3) is bidirectionally electrically connected to the microcontroller (4).

3. The non-destructive testing device for weld seams of circular steel pipes according to claim 2, characterized in that: The positioning component (23) also includes a pressure sensor (232), a limiting piece (235), and a spring (236). The pressure sensor (232) is disposed on the top wall of the positioning chamber (231). The upper end of the positioning column (234) is configured to cooperate with the pressure sensor (232). The limiting piece (235) is disposed in the middle of the positioning column (234). A spring (236) is provided between the upper side of the limiting piece (235) and the top wall of the positioning chamber (231). The pressure sensor (232) is bidirectionally electrically connected to the microcontroller (4).

4. The non-destructive testing device for weld seams of circular steel pipes according to claim 1, characterized in that: The positioning component (23) also includes guide holes (237) and guide posts (238). The outer arc surface of the detection ring (22) is provided with symmetrically distributed guide holes (237). The guide posts (238) are respectively located at the left and right ends of the positioning chamber (231). The upper ends of the guide posts (238) are slidably connected to the guide holes (237) adjacent to the upper side.

5. The non-destructive testing device for weld seams of circular steel pipes according to claim 2, characterized in that: The guide assembly (21) includes a guide frame (211), a mounting platform (212), a bottom guide ball (213), a mounting column (214), and a side guide ball (215). The guide frame (211) is respectively located between two electric conveyor belts (1) and on the left and right sides of the detection ring (22). The mounting platform (212) is fixedly connected between the front and rear ends of the upper side of the guide frame (211). The bottom guide ball (213) is rotatably connected inside the mounting platform (212). The mounting column (214) is rotatably connected to the front and rear ends of the upper end of the mounting platform (212). The upper end of the mounting column (214) is rotatably connected to the side guide ball (215).

6. The non-destructive testing device for weld seams of circular steel pipes according to claim 5, characterized in that: The guide assembly (21) further includes an adjusting column (216), an adjusting frame (217), a pin (218), and an electric cylinder (219). The adjusting column (216) is slidably connected to the adjusting hole on the lower side wall of the guide frame (211). The upper end of the adjusting column (216) is provided with symmetrically distributed adjusting frames (217). The pin (218) is respectively set on the plane at the lower end of the mounting column (214). The outer ends of the two pins (218) are located inside the horizontally adjacent adjusting frames (217). The lower end of the guide frame (211) is provided with an electric cylinder (219). The telescopic end of the electric cylinder (219) is fixedly connected to the lower end of the upper adjacent adjusting column (216).

7. The non-destructive testing device for weld seams of circular steel pipes according to claim 2, characterized in that: The weld detection component is a line laser profile sensor (5), which is located at the left end of the outer arc surface of the detection ring (22). The line laser profile sensor (5) is bidirectionally electrically connected to the microcontroller (4).

Images