Bidirectionally adjustable self-priming phased array probe scanning device and detection method

Abstract

The present invention discloses a bidirectionally adjustable self-priming phased array probe scanning device and a detection method. The device is a chain structure as a whole, including a probe holding device, a plurality of component modules, and an encoder. The plurality of component modules constitute a scanning device chain body; the probe holding device is assembled on the left side of the scanning device chain body through the positioning shaft; the encoder is assembled on the right side of the scanning device chain body. The probe scanning device of the present invention has an adjustable width and a wide range of applications; during on-site detection, it is only necessary to place the upper edge of the scanning device close to the lower edge of the weld, and there is no need to adjust and measure the translation distance and translation parameters of the probe before each detection, which optimizes the detection process and greatly improves the detection efficiency and detection accuracy; the present invention has a compact structure, strong versatility, convenient disassembly and assembly, and simple operation.

Description

Technical Field

[0001] The invention relates to a novel phased array ultrasonic probe scanning device and an assembly and detection method, belonging to the technical field of ultrasonic detection. Background Art

[0002] Phased array ultrasonic testing technology is one of the most advanced and cutting-edge ultrasonic testing technologies in the world. This technology uses a multi-chip array probe to form a large-scale fan-shaped sound beam at one time to perform non-destructive testing on the raw materials or welded joints of the inspected components. It has the characteristics of fast detection speed and high detection sensitivity. In addition, phased array ultrasonic testing technology has powerful data processing functions, which can realize multi-view imaging display of defects, and can record and store detection data. It has a high defect detection rate, accurate positioning and quantification, and has significant technical advantages. Among them, the scanning, recording and storage functions of phased array detection data are mainly realized by the use of phased array probes and scanners. The phased array probe is responsible for collecting detection signals, and the scanner is responsible for fixing the probe and recording the probe position and moving trajectory, and finally forming detection data corresponding to the inspected workpiece. Therefore, the scanner and probe are both important components of the phased array detection system, and their performance directly affects the determination of the detection results. At present, the commonly used phased array scanners for pipeline welding joints are mainly: track scanners, chain scanners, trolley scanners and frame scanners. Among them, track-type scanners require special guide rails to be customized according to the pipeline specifications. The on-site installation of the guide rails is complicated and requires high installation accuracy. In addition, the guide rails have poor versatility and are usually not suitable for the inspection of small-diameter pipe welded joints. Chain scanners are usually composed of components of different shapes. One or more specific components must be selected and assembled according to the pipeline specifications and the instructions. Common chain scanners all have a snap-on design. A complete closed ring must be formed around the pipeline and the final joint must be locked with a snap-on. In addition, the chain scanner probe holding device is usually only suitable for probes of specific shapes, and the probe translation parameters are difficult to set, especially when the parameters are inconvenient to adjust during confined space inspections. The cart-type scanner and frame-type scanner generally have larger dimensions and are usually suitable for phased array inspection of large-diameter pipe welded joints. They are not suitable for small-diameter pipes and densely packed pipe row welded joints. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device that is used in conjunction with a phased array probe to quickly and efficiently realize phased array scanning and detection of pipeline welding joints in response to the defects of the prior art, thereby solving the problems of existing scanners having specific specifications, limited scope of application, inconvenient on-site disassembly and assembly, difficult parameter adjustment, and low detection efficiency and accuracy. The device is particularly suitable for phased array detection of pipeline welding joints made of ferromagnetic materials.

[0004] In order to solve this technical problem, the present invention provides a bidirectionally adjustable self-priming phased array probe scanning device, which is a chain-like structure as a whole, including a probe holding device, a plurality of component modules, and an encoder, and the plurality of component modules constitute a scanning device chain body; the probe holding device is composed of an L-shaped sliding arm and an L-shaped fixed arm to form a holding device body frame, an arm adjustment knob is arranged at the lower part of the sliding arm, and the sliding arm and the fixed arm are connected by the arm adjustment knob; a cylindrical positioning shaft 1 is arranged on one side of the fixed arm, and the probe The holding device is assembled on the left side of the scanning device chain body through the positioning shaft; a transverse cylindrical cavity is arranged on the upper part of the component body, a spring three is placed transversely inside the cavity, a steel ball two is arranged at the front end of the spring three, and the spring three provides thrust for the steel ball two; a steel ball slideway one is arranged on the other side of the component module, the steel ball slideway one is a rectangular groove, the steel ball slideway one is processed along the inner concave surface of the component body, and horizontally spans the surface of the component body; after the two component modules are assembled, the exposed part of the steel ball of the component is embedded in the steel ball slideway one of the next component module to start The component module includes a Z-shaped component body, a cylindrical positioning shaft 2 and a roller 1. The component body is partially magnetic and can be adsorbed on the surface of a ferromagnetic pipe. A roller 1 is arranged on the upper and lower parts of the component body. The roller 1 is connected to the component body through the roller shaft 1 and can rotate freely. The positioning shaft 2 is located on one side of the component body, and a cylindrical positioning hole 1 is arranged on the other side. The positioning shaft 2 of the component module can be inserted into the positioning hole 1 of the next component module. The two component modules are assembled together through the positioning shaft 2 and the positioning hole 1. The encoder includes a Z-shaped encoder body, a roller 2 and a data line. A roller 2 is arranged on the upper and lower parts of the encoder body. The roller 2 is connected to the body through the roller shaft 2 and can rotate freely. One end of the upper roller shaft 2 of the encoder is connected to the roller, and the other end is connected to the analog-to-digital converter. The analog-to-digital converter converts the rotation angle of the roller shaft 2 into the distance moved by the encoder, and transmits it to the phased array detector through the data line. The encoder is assembled on the right side of the scanning device chain body.

[0005] The upper ends of the fixed support arm and the sliding support arm are both provided with a locating pin slide, and a locating pin is provided in the locating pin slide; the locating pin is composed of a T-shaped pin body and a cylindrical support arm, the size of the T-shaped pin body matches the size of the locating pin slide, the T-shaped pin body is installed in the locating pin slide, and can move up and down at the same time, the size of the cylindrical support arm matches the size of the preset locating holes on both sides of the phased array probe wedge block, when the probe is combined with the holding device, the cylinder is inserted into the locating holes on both sides of the probe wedge block to fix the phased array probe, and at the same time can drive the locating pin to move up and down in the locating pin slide; the lower part of the locating pin is connected to a spring 1, and the lower part of the spring is connected to the fixed support arm / sliding support arm.

[0006] The positioning shaft 1 matches the cylindrical positioning hole 1 of the component module and can be smoothly inserted into the positioning hole 1 to realize the assembly of the probe holding device and the component module; a transverse cylindrical cavity is arranged on the upper part of the positioning shaft 1, a spring 2 is placed transversely inside the cavity, a steel ball 1 is arranged at the front end of the spring 2, and the steel ball 1 partially leaks out of the fixed support arm shell. After the probe holding device and the component module are assembled, the leaked part is embedded in the steel ball slide 1 of the component module; the steel ball 1 can move in the steel ball slide 1.

[0007] The lower transverse arm beam of the sliding arm is a hollow structure, which matches the size of the lower cross beam of the fixed arm. The lower cross beam of the fixed arm is inserted into the hollow structure of the lower transverse arm beam of the sliding arm. The sliding arm is driven to move left and right by rotating the arm adjustment knob in / out, which is suitable for phased array detection with probes of different sizes.

[0008] A probe translation adjustment knob is provided at the bottom of the probe holding device. The probe translation adjustment knob is screwed into the lower crossbeam of the fixed support arm. By screwing the probe translation adjustment knob in / out, its extension length can be adjusted to adjust the front and rear translation distance of the probe.

[0009] A cylindrical positioning hole is set on one side of the encoder body, and a cylindrical positioning shaft of the component module can be inserted into the positioning hole of the encoder, so that the component module and the encoder are assembled together; a steel ball slide is processed on the concave surface of one side of the encoder body, and the steel ball slide is a rectangular groove. After the encoder and the component module are assembled, the exposed part of the steel ball of the component module is embedded in the inside of the steel ball slide of the encoder to fix it, so that the component module and the encoder will not fall off or separate naturally during the detection process.

[0010] The number of the component modules is selected according to the diameter of the inspected pipeline. The larger the diameter of the inspected pipeline is, the more component modules are selected, and the smaller the diameter of the inspected pipeline is, the fewer component modules are selected.

[0011] The present invention also provides a detection method using the bidirectionally adjustable self-priming phased array probe scanning device, the steps are as follows: first, place the scanning device on one side of the parent material of the inspected pipeline welding joint, so that the front end of the sliding arm and the fixed arm are flush with the edge of the weld on this side, slowly lower the scanning device, and the scanning device fits tightly with the pipeline under the action of magnetic force; then, press the phased array probe with a finger, slowly rotate the scanning device, and the phased array ultrasonic detector synchronously displays the probe signal and probe displacement information until the workpiece detection is completed; after the detection is completed, remove the scanning device, and repeat the above steps to continue to detect the next workpiece to be inspected.

[0012] Beneficial effects: The width of the probe scanning device of the present invention is adjustable, and it is suitable for detection of phased array probes of different specifications, and has a wide range of applications. Before on-site detection, the probe translation knob can be adjusted to accurately adjust the probe translation distance to the instrument setting position. During on-site detection, it is only necessary to place the upper edge of the scanning device close to the lower edge of the weld, and there is no need to adjust and measure the translation parameters of the probe translation distance before each detection, which optimizes the detection process and greatly improves the detection efficiency and detection accuracy; the component modules of the present invention are all of one specification, with a compact structure, reasonable design, and strong versatility. There is no need to select different modules for combination according to different specifications, which reduces manufacturing and maintenance costs; the scanning device of the present invention only needs to increase or decrease the number of component modules according to the specifications of the inspected pipeline to achieve the purpose of fitting pipelines with different curvatures, and can be used for small-diameter pipes as well as medium- and large-diameter pipeline phased array detection, and has strong versatility; the present invention is designed with a self-locking device, which is convenient for disassembly and assembly and easy to operate. At the same time, the scanning device of the present invention does not require the use of other tools to complete the component assembly and probe assembly work, and the probe is adjusted using a knob, which is simple and efficient. The scanning device of the present invention has magnetism and can be adsorbed on the surface of the inspected pipeline. The scanning device chain does not need to completely surround the entire pipeline surface, and does not need to be fastened with connecting buckles. The component modules used are small, which saves the time for fastening and disassembling the scanning device, and greatly improves the efficiency of on-site detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the probe holding device of the present invention;

[0015] Figure 3 It is a cross-sectional schematic diagram of the probe holding device of the present invention;

[0016] Figure 4 It is a structural schematic diagram of the positioning pin of the present invention;

[0017] Figure 5 It is a structural schematic diagram of the component module of the present invention;

[0018] Figure 6 It is a cross-sectional schematic diagram of the component module of the present invention;

[0019] Figure 7 It is a structural schematic diagram of the encoder of the present invention;

[0020] Figure 8 is a cross-sectional schematic diagram of an encoder of the present invention;

[0021] Fig. 9 Schematic diagram of the detection of the present invention.

[0022] In the figure: 1 probe holding device, 2 component module, 3 encoder, 10 arm adjustment knob, 11 sliding arm, 12 probe translation adjustment knob, 13 fixed arm, 14 positioning shaft 1, 15 positioning pin slide, 16 positioning pin, 161 T-type pin body, 162 cylindrical arm, 17 spring 1, 18 spring 2, 19 steel ball 1, 20 component body, 21 positioning shaft 2, 22 positioning hole 1, 23 steel ball slide 1, 24 roller 1, 25 roller shaft 1, 26 spring 3, 27 steel ball 2, 30 encoder body, 31 data line, 32 positioning hole 2, 33 steel ball slide 2, 34 roller 2, 35 roller shaft 2, 36 analog-to-digital converter, 4 phased array probe, 5 pipeline welding joint. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 , Figure 5 , Figure 7 , Figure 8As shown, the present invention provides a bidirectionally adjustable self-priming phased array probe scanning device, which is a chain-like structure as a whole, including a probe holding device 1, a plurality of component modules 2, and an encoder 3, wherein the plurality of component modules 2 constitute a scanning device chain body; the probe holding device 1 is composed of an L-shaped sliding arm 11 and an L-shaped fixed arm 13 to form a holding device body frame, an arm adjustment knob 10 is arranged at the lower part of the sliding arm 11, and the sliding arm 11 and the fixed arm 13 are connected by the arm adjustment knob 10; a cylindrical positioning shaft 14 is arranged on one side of the fixed arm 13, and the probe holding device 1 is assembled on the left side of the scanning device chain body through the positioning shaft 14; the component module 2 includes a Z-shaped component body 20, a cylindrical positioning shaft 21 and a roller 1 24, and the component body 20 is partially magnetic and can be adsorbed on On the surface of the ferromagnetic pipeline, multiple groups of component bodies 20 constitute a scanning device chain body that can form a strong adsorption force, thereby achieving the purpose of fixing the scanning device; a roller 24 is respectively arranged on the upper and lower parts of the component body 20, and the roller 24 is connected to the component body 20 through a roller shaft 25 and can rotate freely; a positioning shaft 21 is located on one side of the component body 20, and a cylindrical positioning hole 22 is arranged on the other side, and the positioning shaft 21 of the current component module 2 can be inserted into the positioning hole 22 of the next component module 2, and the two component modules 2 are assembled together through the positioning shaft 21 and the positioning hole 22; the encoder 3 includes a Z-type encoder body 30, a roller 2 34, and a data line 31. A roller 2 34 is respectively arranged on the upper and lower parts of the encoder body 30, and the roller 2 34 is connected to the body through a roller shaft 2 35 and can rotate freely. One end of the roller shaft 2 35 on the upper part of the encoder 3 is connected to the roller, and the other end is connected to the analog-to-digital converter 36. The analog-to-digital converter 36 converts the rotation angle of the roller shaft 2 35 into the moving distance of the encoder 3, and transmits it to the phased array detector through the data line 31. The encoder 3 is assembled on the right side of the scanning device chain body.

[0025] like Figure 3 , Figure 4 As shown, the upper ends of the fixed support arm 13 and the sliding support arm 11 are both provided with a locating pin slide 15, in which a locating pin 16 is provided, and the locating pin slide 15 is a T-shaped guide groove structure, and the size of the T-shaped pin body 161 matches the size of the locating pin slide 15, and the T-shaped pin body 161 is installed in the locating pin slide 15, and can be moved up and down at the same time; the size of the cylindrical support arm 162 matches the size of the pre-set locating holes on both sides of the phased array probe wedge block. When the probe is combined with the holding device, the cylinder is inserted into the locating holes on both sides of the probe wedge block to fix the phased array probe, and at the same time, the locating pin 16 can be driven to move up and down in the locating pin slide 15; the lower part of the locating pin 16 is connected to a spring 17, and the lower part of the spring 17 is connected to the fixed support arm 13 / sliding support arm 11 to provide tension for the locating pin.

[0026] The positioning shaft 14 matches the cylindrical positioning hole 122 of the component module 2 and can be smoothly inserted into the positioning hole 122 to realize the assembly of the probe holding device 1 and the component module 2; a transverse cylindrical cavity is arranged on the upper part of the positioning shaft 14, and a spring 18 is placed transversely inside the cavity. A steel ball 19 is arranged at the front end of the spring 18 to provide thrust for the steel ball 19; the steel ball 19 partially leaks out of the outer shell of the fixed support arm 13, and after the probe holding device 1 and the component module 2 are assembled, the leaked part is embedded in the steel ball slide 23 of the component module 2 to play a fixing role, so that the probe holding device 1 and the component module 2 will not fall off or separate naturally during the detection process; at the same time, the steel ball 19 can move in the steel ball slide 23, and will not hinder the rotation of the probe holding device 1 and the component module 2 around the positioning shaft 14.

[0027] The lower transverse arm beam of the sliding arm 11 is a hollow structure, which matches the size of the lower transverse beam of the fixed arm 13. The lower transverse beam of the fixed arm 13 is inserted into the hollow structure of the lower transverse arm beam of the sliding arm 11, so that the sliding arm 11 and the fixed arm 13 are installed together; the sliding arm 11 is driven to move left and right by rotating the arm adjustment knob 10 in / out, thereby achieving the purpose of adjusting the width of the probe holding device to be suitable for phased array detection of probes of different sizes; the arm adjustment knob 10 passes through the outer wall of the sliding arm 11 and is screwed into the lower transverse beam of the fixed arm 13 to fix the sliding arm 11.

[0028] A probe translation adjustment knob 12 is provided at the lower part of the probe holding device 1. The probe translation adjustment knob 12 is screwed into the lower cross beam of the fixed support arm 13. The probe translation adjustment knob 12 can be screwed in or out by rotating it forward or reversely. The extension length of the probe translation adjustment knob 12 can be adjusted by screwing it in / out, and the forward and backward translation distance of the probe can be adjusted.

[0029] like Figure 6 As shown, a transverse cylindrical cavity is arranged on the upper part of the component body 20, a spring three 26 is placed transversely inside the cavity, a steel ball two 27 is arranged at the front end of the spring three 26, and the spring three 26 provides thrust for the steel ball two 27; a steel ball slideway 23 is arranged on the other side of the component module 2, the steel ball slideway 23 is a rectangular groove, the steel ball slideway 23 is processed along the concave surface of the component body, and horizontally spans the surface of the component body; after the two component modules 2 are assembled, the exposed part of the steel ball of this component is embedded in the steel ball slideway 23 of the next component module to play a fixing role, so that each component module will not fall off and separate naturally during the detection process.

[0030] A cylindrical positioning hole 232 is provided on one side of the encoder body 30, and the cylindrical positioning shaft 21 of the component module 2 can be inserted into the positioning hole 232 of the encoder, so that the component module 2 and the encoder 3 are assembled together; a steel ball slide 233 is processed on the concave surface of one side of the encoder body 30, and the steel ball slide 233 is a rectangular groove. After the encoder 3 and the component module 2 are assembled, the exposed part of the steel ball 27 of the component module 2 is embedded in the steel ball slide 233 of the encoder 3 to fix it, so that the component module 2 and the encoder 3 will not fall off or separate naturally during the detection process.

[0031] The encoder 3 is assembled on the rightmost side of the scanning device chain body, which is assembled from a plurality of component modules 2 and is located in the middle of the scanning device. Each component module 2, the component module 2 and the probe holding device 1, and the component module 2 and the encoder 3 are matched and installed through positioning shafts and positioning holes, and finally assembled to form the scanning device described in the present invention.

[0032] The number of the component modules 2 is selected according to the diameter of the inspected pipeline. The larger the diameter of the inspected pipeline is, the more component modules 2 are selected, and the smaller the diameter of the inspected pipeline is, the fewer the component modules 2 are selected.

[0033] The assembly method of the bidirectionally adjustable self-priming phased array probe scanning device comprises the following steps:

[0034] 1) Pick up the component modules 2 one by one, and insert the positioning shaft 21 of the component module 2 into the positioning hole 1 22 of the next component module 2 in turn. When the steel ball 27 of the component module 2 is embedded in the steel ball slide 1 23 of the next component module 2, the two component modules are assembled. Repeat the above steps to assemble all the selected component modules 2 in turn;

[0035] 2) Pick up the encoder 3, align the second positioning hole 32 with the second positioning shaft 21 of the component module 2, and insert the second positioning shaft 21 into the second positioning hole 32. When the second steel ball 27 of the component module 2 is embedded in the second steel ball slideway 33 of the encoder 3, the encoder 3 and the component module 2 are assembled;

[0036] 3) Rotate the probe translation adjustment knob 12 in the opposite direction and turn the knob out to minimize the extension length of the knob front end;

[0037] 4) Rotate the arm adjustment knob 10 in the reverse direction to pull out the sliding arm 11, align the positioning holes on both sides of the probe wedge with the cylinder at the front end of the positioning pin, rotate the arm adjustment knob 10 in the forward direction to push the sliding arm 11 until the phased array probe is tightened;

[0038] 5) Check the probe translation distance value set in the phased array instrument parameters, rotate the probe translation adjustment knob 12 in the positive direction to turn the knob in, and the probe moves upward under the push of the front plane of the knob. Use a ruler to measure the distance from the front end of the probe to the front end of the support arm. When the distance is the same as the probe translation distance set in the instrument, stop rotating, and the probe translation distance adjustment is completed;

[0039] 6) Align the positioning shaft 14 on one side of the probe holding device 1 with the positioning hole 22 of the component module 2, and insert the positioning shaft 14 into the positioning hole 22 of the component module 2. When the steel ball 19 of the probe holding device 1 is embedded in the steel ball slide 23 of the component module 2, the assembly of the probe holding device 1 and the component module 2 is completed.

[0040] like Fig. 9 As shown, the present invention also provides a detection method using the bidirectionally adjustable self-priming phased array probe scanning device, the steps are as follows: first, place the scanning device on the parent material on one side of the inspected pipeline welding joint 5, so that the front end of the sliding arm 11 and the fixed arm 13 are flush with the edge of the weld on this side, slowly lower the scanning device, and the scanning device fits tightly with the pipeline under the action of magnetic force; then, press the phased array probe 4 with your finger, slowly rotate the scanning device, and the phased array ultrasonic detector synchronously displays the probe signal and the probe displacement information until the workpiece detection is completed; after the detection is completed, remove the scanning device, and repeat the above steps to continue to detect the next workpiece to be inspected.

[0041] The present invention uses a Z-shaped component module, and designs a cylindrical positioning axis and a cylindrical positioning hole structure. The two are used together to facilitate quick assembly and disassembly on site. While being easy to assemble and disassemble, they can also rotate around their respective positioning axes. The combination of multiple groups of component modules can form a smooth curved surface, so that the scanning device and the surface of the inspected pipeline can be tightly fitted. Only one type of component module needs to be processed, and phased array detection can be performed on pipeline welding joints of different specifications by increasing and decreasing the number of components. The structure is compact, easy to carry, simple and efficient to operate, and the manufacturing cost and maintenance cost are reduced. The present invention uses a simple self-locking device to provide continuous thrust to the steel ball through a spring. The exposed part of the steel ball matches the size of the rectangular groove. After the assembly of each component module is completed, the exposed part of the steel ball is embedded in the rectangular groove to fix it. When disassembling, the steel ball retracts and disengages from the rectangular groove under the action of external force, and the two components are separated smoothly. The self-locking device can not only ensure that the components do not fall off during the detection process, but also can be quickly separated during the disassembly process, which is convenient for on-site use.

[0042] The present invention can flexibly control the width of the probe holding device and the translation distance of the probe in the holding device by adjusting the knob, is suitable for scanning and detecting phased array probes of different widths, and also increases the accuracy of setting the probe translation distance parameter; using the scanning device of the present invention, it is only necessary to increase or decrease the number of component modules according to the specifications of the inspected pipeline to achieve the purpose of fitting pipeline detection with different curvatures, and can be used for small-diameter pipes as well as medium- and large-diameter pipeline phased array detection, and has strong versatility; the present invention uses a scanning device chain body formed by a combination of magnetic component modules to provide sufficient magnetic force, so that the scanning device is firmly adsorbed on the surface of the inspected pipeline, and the scanning device chain does not need to completely surround the entire pipeline surface, and does not need to be fastened with a connecting buckle. During the detection process, it is only necessary to rotate the scanning device around the pipeline surface for detection, and the scanning device will not fall off, saving the time for fastening and disassembling the scanning device, and greatly improving the efficiency of on-site detection.

[0043] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A bidirectionally adjustable self-priming phased array probe scanning device, characterized in that: The whole is a chain-like structure, comprising a probe holding device (1), a plurality of component modules (2), and an encoder (3), wherein the plurality of component modules (2) constitute a scanning device chain body; the probe holding device (1) is composed of an L-shaped sliding arm (11) and an L-shaped fixed arm (13) to form a holding device body frame, an arm adjustment knob (10) is provided at the lower part of the sliding arm (11), and the sliding arm (11) and the fixed arm (13) are connected via the arm adjustment knob (10); a cylindrical positioning shaft (14) is provided on one side of the fixed arm (13), and the probe holding device (1) is assembled on the left side of the scanning device chain body via the positioning shaft (14); the component modules (2) are arranged on the left side of the scanning device chain body, and the plurality of component modules (2) are arranged on the left side of the scanning device chain body, and the plurality of component modules (2) are arranged on the right side of the scanning device chain body, and the plurality of ... The module (2) comprises a Z-shaped component body (20), a cylindrical positioning shaft (21) and a roller (24). The component body (20) is partially magnetic and can be adsorbed on the surface of a ferromagnetic pipe. A roller (24) is arranged on the upper and lower parts of the component body (20). The roller (24) is connected to the component body (20) via a roller shaft (25) and can rotate freely. The positioning shaft (21) is located on one side of the component body (20), and a cylindrical positioning hole (22) is arranged on the other side. The positioning shaft (21) of the component module (2) can be inserted into the positioning hole (22) of the next component module (2). The two component modules (2) are connected via the positioning shaft (21) and The first positioning hole (22) is assembled together; a transverse cylindrical cavity is arranged on the upper part of the component body (20), and a spring three (26) is placed transversely inside the cavity. A steel ball two (27) is arranged at the front end of the spring three (26), and the spring three (26) provides thrust for the steel ball two (27); a steel ball slideway (23) is arranged on the other side of the component module (2), and the steel ball slideway (23) is a rectangular groove. The steel ball slideway (23) is processed along the inner concave surface of the component body and horizontally spans the surface of the component body; after the two component modules (2) are assembled, the exposed part of the steel ball of the component is embedded in the steel ball slideway (23) of the next component module to play a fixing role, so that each component module can be fixed during detection. The encoder (3) will not fall off or separate naturally during the process; the encoder (3) comprises a Z-shaped encoder body (30), a roller (34), and a data line (31); the encoder body (30) is provided with a roller (34) at the top and bottom, respectively; the roller (34) is connected to the body via a roller shaft (35) and can rotate freely; one end of the roller shaft (35) at the top of the encoder (3) is connected to the roller, and the other end is connected to an analog-to-digital converter (36); the analog-to-digital converter (36) converts the recorded rotation angle of the roller shaft (35) into the distance moved by the encoder (3), and transmits the converted data to the phased array detector via the data line (31); the encoder (3) is assembled on the right side of the scanning device chain body.

2. The bidirectionally adjustable self-priming phased array probe scanning device according to claim 1 is characterized in that: The upper ends of the fixed support arm (13) and the sliding support arm (11) are both provided with a positioning pin slideway (15), and a positioning pin (16) is provided in the positioning pin slideway (15); the positioning pin (16) is composed of a T-shaped pin body (161) and a cylindrical support arm (162); the size of the T-shaped pin body (161) matches the size of the positioning pin slideway (15); the T-shaped pin body (161) is installed in the positioning pin slideway (15) and can move up and down; the size of the cylindrical support arm (162) matches the size of the positioning holes preset on both sides of the phased array probe wedge; when the probe is combined with the holding device, the cylinder is inserted into the positioning holes on both sides of the probe wedge to fix the phased array probe, and can drive the positioning pin (16) to move up and down in the positioning pin slideway (15); the lower part of the positioning pin (16) is connected to a spring 1 (17), and the lower part of the spring 1 (17) is connected to the fixed support arm (13) / the sliding support arm (11).

3. The bidirectionally adjustable self-priming phased array probe scanning device according to claim 1 is characterized in that: The positioning shaft (14) matches the cylindrical positioning hole (22) of the component module (2) and can be smoothly inserted into the positioning hole (22), so as to realize the assembly of the probe holding device (1) and the component module (2); a transverse cylindrical cavity is arranged on the upper part of the positioning shaft (14), a spring (18) is arranged transversely inside the cavity, a steel ball (19) is arranged at the front end of the spring (18), and the steel ball (19) partially leaks out of the outer shell of the fixed support arm (13). After the probe holding device (1) and the component module (2) are assembled, the leaked part is embedded in the steel ball slideway (23) of the component module (2); the steel ball (19) can move in the steel ball slideway (23).

4. The bidirectionally adjustable self-priming phased array probe scanning device according to claim 1 is characterized in that: The lower transverse arm beam of the sliding support arm (11) is a hollow structure, the hollow structure matches the size of the lower transverse beam of the fixed support arm (13), and the lower transverse beam of the fixed support arm (13) is inserted into the hollow structure of the lower transverse arm beam of the sliding support arm (11); the sliding support arm (11) is driven to move left and right by rotating the support arm adjustment knob (10) in / out, and is suitable for phased array detection with probes of different sizes.

5. The bidirectionally adjustable self-priming phased array probe scanning device according to claim 1 is characterized in that: The probe holding device (1) has a probe translation adjustment knob (12) at the bottom thereof. The probe translation adjustment knob (12) is screwed into the lower crossbeam of the fixed support arm (13). The extension length of the probe translation adjustment knob (12) is adjusted by screwing it in or out, thereby adjusting the front and rear translation distance of the probe.

6. The bidirectionally adjustable self-priming phased array probe scanning device according to claim 1 is characterized in that: A cylindrical positioning hole (32) is provided on one side of the encoder body (30), and a cylindrical positioning shaft (21) of the component module (2) can be inserted into the positioning hole (32) of the encoder, so that the component module (2) and the encoder (3) are assembled together; a steel ball slideway (33) is processed on the inner concave surface of one side of the encoder body (30), and the steel ball slideway (33) is a rectangular groove. After the encoder (3) and the component module (2) are assembled, the exposed part of the steel ball (27) of the component module (2) is embedded in the steel ball slideway (33) of the encoder (3) to play a fixing role, so that the component module (2) and the encoder (3) will not fall off or separate naturally during the detection process.

7. The bidirectionally adjustable self-priming phased array probe scanning device according to any one of claims 1 to 6, characterized in that: The number of the component modules (2) is selected according to the diameter of the inspected pipeline; the larger the diameter of the inspected pipeline, the more component modules (2) are selected, and the smaller the diameter of the inspected pipeline, the fewer the component modules (2) are selected.

8. A detection method using the bidirectionally adjustable self-absorption phased array probe scanning device according to any one of claims 1 to 7, characterized in that: First, the scanning device is placed on the parent material on one side of the weld joint (5) of the pipeline to be inspected, so that the front ends of the sliding arm (11) and the fixed arm (13) are flush with the edge of the weld on this side, and the scanning device is slowly lowered. Under the action of magnetic force, the scanning device and the pipeline are tightly fitted; then, the phased array probe (4) is pressed by a finger, and the scanning device is slowly rotated. The phased array ultrasonic detector synchronously displays the probe signal and the probe displacement information until the workpiece inspection is completed; after the inspection is completed, the scanning device is removed, and the above steps are repeated to continue to inspect the next workpiece to be inspected.

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