A steel pipe joint ultrasonic inspection equipment

Abstract

The application discloses a steel pipe joint ultrasonic flaw detection device, and belongs to the technical field of steel pipe joint detection. The device comprises an L-shaped probe seat capable of being attached to a joint corner and a steel pipe body. The device is novel and ingenious. When the L-shaped probe seat is attached to the joint corner, two probes simultaneously detect the connecting areas on both sides of the joint, covering the corner blind area, and the detection rate of the joint corner defects is greatly improved. Through the arc-shaped sliding rail connected with the L-shaped probe seat, the sliding rail can slide along the joint and is concentrically arranged with the steel pipe. When the sliding block slides along the sliding rail, the L-shaped probe seat is driven to rotate around the outer periphery of the joint, full-circumferential detection of the joint is realized, the coverage rate of the joint detection reaches 100%, the blind area of traditional fixed-point detection is avoided, the detection efficiency is greatly improved, and the practicality of the device is greatly improved.

Description

Technical Field

[0001] This application relates to the field of steel pipe joint inspection technology, and in particular to an ultrasonic flaw detection device for steel pipe joints. Background Technology

[0002] In engineering applications, steel pipes are often joined together by welding, flange connection and other methods to form a pipeline system. The joint is the weakest link of the entire pipeline system. It is prone to defects such as incomplete penetration, slag inclusion, cracks and damage to the sealing surface due to improper welding process, stress concentration, corrosion and other factors. These defects may lead to media leakage, reduced structural strength and even major safety accidents.

[0003] Currently, steel pipe joint flaw detection mainly uses manual ultrasonic testing. Inspectors move the probe across the joint surface and judge the defects based on experience. This method is greatly affected by human factors, and blind spots are easily formed at joint corners because the probe is difficult to fit. At the same time, the coupling stability between traditional probes and the joint surface is poor, and the signal fluctuation is large, resulting in low accuracy of defect judgment. As industrial pipelines develop towards high pressure, high temperature, and large diameter, the requirements for the accuracy and reliability of joint flaw detection are becoming increasingly higher. Developing a dedicated flaw detection device that can accurately detect joint corner defects and ensure stable coupling is of great significance.

[0004] Therefore, this application proposes an ultrasonic flaw detection device for steel pipe joints. Utility Model Content

[0005] This application proposes an ultrasonic flaw detection device for steel pipe joints to solve the problems mentioned in the background art. By using an L-shaped probe holder that fits into the corner of the joint, when the probe holder is in contact with the corner, two probes simultaneously detect the connection areas on both sides of the joint, covering the corner blind zone and greatly improving the detection rate of corner defects. Through an arc-shaped slide rail connected to the L-shaped probe holder, the slide rail can slide along the joint and is concentrically set with the steel pipe. When the slider slides along the slide rail, it drives the L-shaped probe holder to rotate around the outer circumference of the joint, achieving full circumferential inspection of the joint. The joint inspection coverage reaches 100%, avoiding the blind zone of traditional fixed-point inspection, greatly improving inspection efficiency and significantly enhancing the practicality of the device.

[0006] To achieve the above objectives, this application adopts the following technical solution: An ultrasonic flaw detection device for steel pipe joints includes an L-shaped probe base that can fit the corner of the joint and a steel pipe body. Ultrasonic probes are respectively installed on the two right-angled surfaces of the L-shaped probe base. Both ultrasonic probes are dual-crystal probes, containing a transmitting crystal and a receiving crystal, and are symmetrically distributed at an angle. An arc-shaped slide rail is installed between the L-shaped probe base and the steel pipe body. Elastic pressure rollers are provided on the outer sides of both ultrasonic probes. A pipe diameter adjustment component is provided on the arc-shaped slide rail.

[0007] In a preferred embodiment, the arc-shaped slide rail includes a slide rail body, a slider, and a fixing frame, wherein the slide rail body is connected to the outer wall of the steel pipe body through the fixing frame; By connecting the L-shaped probe holder to the arc-shaped slide rail, the slide rail can slide along the interface and is set concentrically with the steel pipe. When the slider slides along the slide rail, it drives the L-shaped probe holder to rotate around the outer circumference of the interface, realizing full circumference detection of the interface, thereby improving the practicality of the device.

[0008] In one preferred embodiment, the L-shaped probe holder is provided with a slider that is adapted to the slide rail body, and the slider slides along the slide rail body; By connecting the L-shaped probe mount to the arc-shaped slide rail, the interface detection coverage reaches 100%, avoiding the blind spots of traditional fixed-point detection, greatly improving detection efficiency, and thus enhancing the practicality of the device.

[0009] In a preferred embodiment, the elastic pressure roller includes a pressure roller body and a spring arm, with both pressure roller bodies disposed on the outside of the ultrasonic probe and in contact with the interface surface of the steel pipe body; The spring arm provides continuous pressure through the elastic pressure roller mounted on the L-shaped probe mount, which keeps the probe in contact with the interface, thus improving the practicality of the device.

[0010] In a preferred embodiment, the two pressure roller bodies are connected to the right-angle edge of the L-shaped probe seat by several spring arms, and the roller surface is parallel to the interface surface; The spring arm's elasticity ensures the probe remains in close contact with the interface surface, while the pressure roller provides auxiliary guidance as it moves with the probe seat, maintaining a stable relative position between the probe and the interface. This significantly improves the probe's coupling stability and enhances the device's practicality.

[0011] In a preferred embodiment, the pipe diameter adjustment assembly includes fixed claws and a lead screw, with several fixed claws evenly distributed along the arc-shaped slide rail and threadedly connected to the slide rail body via the lead screw; The pipe diameter adjustment component connected by the arc-shaped slide rail allows the fixing claw to adapt to steel pipes of different diameters. The adjusting screw can change the extension length of the fixing claw, so that the arc-shaped pad fits tightly against the outer wall of steel pipes of different diameters, and the slide rail is fixed on the outer periphery of the interface. It can adapt to the interface detection of steel pipes of various diameters, and the installation and debugging time is shortened to less than a minute, improving the versatility of the equipment and thus improving the practicality of the device.

[0012] In a preferred embodiment, the pipe diameter adjustment assembly further includes arc-shaped pads, each of which is disposed on a fixing claw and fits against the outer wall of the steel pipe body; The device features an arc-shaped pad at the claw end that fits against the outer wall of the steel pipe, protecting the outer wall of the steel pipe and preventing wear caused by direct contact with the fixed claw, thus improving the device's practicality.

[0013] The beneficial effects of this application are: 1. This ultrasonic flaw detection equipment for steel pipe joints uses an L-shaped probe seat that can fit into the corner of the joint. When the probe seat fits into the corner of the joint, two probes simultaneously detect the connection areas on both sides of the joint, covering the corner blind zone and greatly improving the detection rate of corner defects. Through the arc-shaped slide rail connected to the L-shaped probe seat, the slide rail can slide along the joint and is concentrically set with the steel pipe. When the slider slides along the slide rail, it drives the L-shaped probe seat to rotate around the outer circumference of the joint, realizing full circumference detection of the joint. The joint detection coverage reaches 100%, avoiding the blind zone of traditional fixed-point detection, greatly improving the detection efficiency and greatly enhancing the practicality of the device. 2. This ultrasonic flaw detection device for steel pipe interfaces features a pipe diameter adjustment component connected by an arc-shaped slide rail. The fixing claw can adapt to steel pipes of different diameters, and the claw end is equipped with an arc-shaped pad that fits against the outer wall of the steel pipe. The adjusting screw can change the extension length of the fixing claw, so that the arc-shaped pad fits tightly against the outer wall of steel pipes of different diameters. The slide rail is fixed to the outer circumference of the interface, which can adapt to the inspection of steel pipe interfaces of various diameters. The installation and debugging time is shortened to less than 5 minutes, improving the versatility of the equipment and greatly enhancing the practicality of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device in this application; Figure 2 This is a schematic diagram of the elastic pressure roller of the device in this application; Figure 3 This is a schematic diagram of the internal structure of the device in this application; Figure 4 For this application Figure 3 Enlarged view of point A in the middle.

[0015] The following are the labels in the diagram: 1. L-shaped probe holder; 2. Ultrasonic probe; 21. Transmitting wafer; 22. Receiving wafer; 3. Steel pipe body; 4. Arc-shaped slide rail; 41. Slide rail body; 42. Slider; 43. Fixing frame; 5. Elastic pressure roller; 51. Pressure roller body; 52. Spring arm; 6. Pipe diameter adjustment assembly; 61. Fixing claw; 62. Lead screw; 63. Arc-shaped pad. Detailed Implementation

[0016] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0017] Reference Figure 1-4An ultrasonic flaw detection device for steel pipe interfaces includes an L-shaped probe base 1 that can fit the corner of the interface and a steel pipe body 3. Ultrasonic probes 2 are respectively installed on the two right-angled surfaces of the L-shaped probe base 1. Both ultrasonic probes 2 are dual-crystal probes, containing a transmitting crystal 21 and a receiving crystal 22, which are symmetrically distributed at an angle. An arc-shaped slide rail 4 is installed between the L-shaped probe base 1 and the steel pipe body 3. Elastic pressure rollers 5 are provided on the outer side of both ultrasonic probes 2. A pipe diameter adjustment component 6 is provided on the arc-shaped slide rail 4.

[0018] Reference Figure 1-4 The arc-shaped slide rail 4 includes a slide rail body 41, a slider 42, and a fixing frame 43. The slide rail body 41 is connected to the outer wall of the steel pipe body 3 through the fixing frame 43. The slide rail 4, which is connected to the L-shaped probe seat 1, can slide along the interface and is concentrically set with the steel pipe. When the slider 42 slides along the slide rail, it drives the L-shaped probe seat 1 to rotate around the outer circumference of the interface, thereby realizing full circumference detection of the interface and improving the practicality of the device.

[0019] Reference Figure 1-4 The L-shaped probe holder 1 is equipped with a slider 42 that is adapted to the slide rail body 41. The slider 42 slides along the slide rail body 41. By connecting the arc-shaped slide rail 4 to the L-shaped probe holder 1, the interface detection coverage reaches 100%, avoiding the blind spots of traditional fixed-point detection, greatly improving the detection efficiency, and thus improving the practicality of the device.

[0020] Reference Figure 1-4 The elastic pressure roller 5 includes a pressure roller body 51 and a spring arm 52. Both pressure roller bodies 51 are located on the outside of the ultrasonic probe 2 and are in contact with the interface surface of the steel pipe body 3. Through the elastic pressure roller 5 installed on the L-shaped probe seat 1, the spring arm 52 provides continuous pressure to make the probe fit the interface, thereby improving the practicality of the device.

[0021] Reference Figure 1-4 Two pressure roller bodies 51 are connected to the right-angle edge of the L-shaped probe seat 1 by several spring arms 52, with the wheel surface parallel to the interface surface. The spring force of the spring arms 52 ensures that the probe is always in close contact with the interface surface. The pressure rollers assist in guiding the probe as it moves with the probe seat, maintaining the relative position of the probe and the interface stable. The probe coupling stability is greatly improved, thereby enhancing the practicality of the device.

[0022] Reference Figure 1 , 34. The pipe diameter adjustment component 6 includes a fixing claw 61 and a lead screw 62. Several fixing claws 61 are evenly distributed along the arc-shaped slide rail 4 and are threadedly connected to the slide rail body 41 through the lead screw 62. The fixing claws 61 of the pipe diameter adjustment component 6 connected through the arc-shaped slide rail 4 can be adapted to steel pipes of different diameters. The adjusting lead screw 62 can change the extension length of the fixing claws 61, so that the arc-shaped pad 63 fits tightly against the outer wall of steel pipes of different diameters, and fixes the slide rail on the outer periphery of the interface. It can be adapted to the interface detection of steel pipes of various diameters, and the installation and debugging time is shortened to less than 5 minutes, improving the versatility of the equipment and thus improving the practicality of the device.

[0023] Reference Figure 1 , 3 4. The pipe diameter adjustment component 6 also includes an arc-shaped pad 63. Each arc-shaped pad 63 is set on the fixed claw 61 and fits against the outer wall of the steel pipe body 3. By providing an arc-shaped pad 63 at the claw end that fits against the outer wall of the steel pipe, the outer wall of the steel pipe body 3 is protected, and direct contact with the fixed claw 61 is avoided to prevent wear, thereby improving the practicality of the device.

[0024] Working Principle: The L-shaped probe holder 1, which fits into the corner of the interface, allows two probes to simultaneously detect the connection areas on both sides of the interface when the probe holder is in contact with the corner, covering the corner blind zone and significantly improving the detection rate of interface corner defects. It can detect incomplete penetration defects as small as 0.3mm in length. The arc-shaped slide rail 4, connected to the L-shaped probe holder 1, slides along the interface and is concentrically set with the steel pipe. When the slider 42 slides along the slide rail, it drives the L-shaped probe holder 1 to rotate around the outer circumference of the interface, achieving full circumferential detection of the interface. The interface detection coverage reaches 100%, avoiding the blind zone of traditional fixed-point detection and greatly improving detection efficiency. The elastic pressure roller 5 mounted on the L-shaped probe holder 1 and the spring arm 52 provide continuous pressure to keep the probe in contact with the interface. The elasticity of the spring arm 52 ensures that the probe remains tightly in contact with the interface surface. The pressure roller provides auxiliary guidance as the probe holder moves, maintaining the relative position stability between the probe and the interface, greatly improving probe coupling stability. The dual-crystal probe built into the L-shaped probe holder 1 has a transmitting crystal 21 and a receiving crystal 22 located on the probe... The inner sides of the probe are symmetrically distributed on both sides of the central axis of the probe, forming an angle of 30°-45° with the interface surface. The ultrasonic waves emitted by the transmitting chip 21 are incident on the inside of the interface at an inclined angle. After being reflected by the defect, they are captured by the receiving chip 22, which enhances the detection sensitivity of internal defects. The detection depth of internal defects in the interface is increased to 5mm, and it can identify slag inclusion defects with a diameter of 0.2mm. The pipe diameter adjustment component 6 is connected by the arc-shaped slide rail 4. The fixing claw 61 can be adapted to steel pipes of different diameters. The claw end is provided with an arc-shaped pad 63 that fits against the outer wall of the steel pipe. The adjusting screw 62 can change the extension length of the fixing claw 61, so that the arc-shaped pad 63 fits tightly against the outer wall of steel pipes of different diameters. The slide rail is fixed on the outer periphery of the interface, which can be adapted to the inspection of steel pipe interfaces of various diameters. The installation and debugging time is shortened to less than 5 minutes, improving the versatility of the equipment. This equipment solves the problems that steel pipe seam interfaces (such as welded joints) are prone to internal defects such as incomplete penetration and slag inclusions. Existing detection equipment has a large blind zone for defect detection at interface corners and poor coupling stability.

[0025] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. An ultrasonic flaw detection device for steel pipe joints, comprising an L-shaped probe holder (1) that can conform to the corner of the joint and a steel pipe body (3), characterized in that, The two right-angled surfaces of the L-shaped probe holder (1) are respectively equipped with ultrasonic probes (2). Both ultrasonic probes (2) are dual-crystal probes, containing a transmitting crystal (21) and a receiving crystal (22), which are symmetrically distributed at an angle. An arc-shaped slide rail (4) is installed between the L-shaped probe holder (1) and the steel pipe body (3). An elastic pressure roller (5) is provided on the outer side of both ultrasonic probes (2). A pipe diameter adjustment component (6) is provided on the arc-shaped slide rail (4).

2. The ultrasonic flaw detection equipment for steel pipe joints according to claim 1, characterized in that, The arc-shaped slide rail (4) includes a slide rail body (41), a slider (42) and a fixing frame (43). The slide rail body (41) is connected to the outer wall of the steel pipe body (3) through the fixing frame (43).

3. The ultrasonic flaw detection equipment for steel pipe joints according to claim 2, characterized in that, The L-shaped probe holder (1) is provided with a slider (42) that is adapted to the slide rail body (41), and the slider (42) slides along the slide rail body (41).

4. The ultrasonic flaw detection equipment for steel pipe joints according to claim 1, characterized in that, The elastic pressure roller (5) includes a pressure roller body (51) and a spring arm (52). Both pressure roller bodies (51) are located on the outside of the ultrasonic probe (2) and are in contact with the interface surface of the steel pipe body (3).

5. The ultrasonic flaw detection equipment for steel pipe joints according to claim 4, characterized in that, The two pressure roller bodies (51) are connected to the right-angle edge of the L-shaped probe seat (1) by several spring arms (52), and the wheel surface is parallel to the interface surface.

6. The ultrasonic flaw detection equipment for steel pipe joints according to claim 1, characterized in that, The pipe diameter adjustment assembly (6) includes a fixed claw (61) and a lead screw (62). Several fixed claws (61) are evenly distributed along the arc-shaped slide rail (4) and are threadedly connected to the slide rail body (41) through the lead screw (62).

7. The ultrasonic flaw detection equipment for steel pipe joints according to claim 6, characterized in that, The pipe diameter adjustment assembly (6) also includes an arc-shaped pad (63), each of which is disposed on a fixing claw (61) and fits against the outer wall of the steel pipe body (3).

Images