Pipeline detection device and method based on phased array ultrasonic waves

Abstract

The invention discloses a pipeline detection device and method based on phased array ultrasonic waves, and relates to the technical field of pipeline detection. The pipeline detection device based on phased array ultrasonic waves comprises a shell with an opening in the lower portion and a phased array ultrasonic detector installed in the shell, an arc-shaped filter plate is fixedly connected to the upper portion of a strip-shaped discharging groove in an embedded mode, and a scraping and collecting mechanism used for scraping and collecting a coated coupling agent in time after detection is completed is arranged on the right portion of an inner cavity of the shell. According to the invention, the coupling agent is uniformly coated on the surface of the pipeline in a thickness-constant manner through the self-extrusion coating mechanism, the consistency of acoustic impedance in a welding seam or a detection area is ensured, the stability of ultrasonic echo intensity is improved, and a detection blind area caused by coating missing is avoided, so that the detection accuracy and reliability are improved; couplant can be scraped and collected in time after detection, the retention time of the couplant on the surface of the pipeline is shortened, solidification residues are effectively prevented, and the surface quality of the pipeline is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and in particular to a pipeline detection device and method based on phased array ultrasound. Background Art

[0002] As the main conveying device for gas and liquid media, pipelines have been widely used in petrochemical, coal chemical, thermal power generation and other fields. For example, they are used for long-distance pipelines for oil and gas media transportation, petrochemical pipelines in chemical plants, and gas pipelines in municipal engineering. Since pipelines often need to be welded and extended according to actual use needs when they are processed and shipped out of the factory, in order to ensure the sealing and structural integrity of the welds, phased array ultrasonic testing is usually required for non-destructive testing of welds. Phased array ultrasonic testing relies on the transmission of sound waves between the phased array ultrasonic detector and the workpiece being tested. Air will seriously hinder the effective transmission of ultrasonic waves. Therefore, a coupling agent medium must be used to fill the gap between the probe and the workpiece surface to ensure that the sound wave has sufficient transmittance, thereby improving the echo signal quality and achieving accurate detection.

[0003] Currently, coupling agent application is typically performed manually or semi-automatically, using brushes, scrapers, or simple extrusion devices to cover the surface of the test area. However, when it comes to pipeline inspections involving large welds, existing coating methods often suffer from issues such as difficulty controlling coating thickness and uneven coverage. These issues can manifest as overly thick coating in certain areas, leading to acoustic impedance mismatch and unstable echo amplitude. Alternatively, thin coating or incomplete coverage can create missed areas, resulting in weakened echoes, blurred images, and even blind spots, impacting the accuracy and reliability of defect identification.

[0004] In addition, the coupling agent needs to be cleaned after the pipeline inspection. When there are multiple welding areas in a single pipeline for continuous inspection, the coupling agent needs to wait for a long time for subsequent cleaning. During the waiting period, the coupling agent is prone to lose water and become viscous, increasing the difficulty of cleaning. Summary of the Invention

[0005] The present invention provides a pipeline inspection device and method based on phased array ultrasound, which solves the problem that the application of coupling agent in existing pipeline inspection mainly relies on manual or semi-automatic methods. For large-area weld inspection, the coating thickness is often difficult to control and the coverage is uneven. This can easily lead to acoustic impedance mismatch, unstable echo amplitude, or uncoated areas, resulting in image blur and detection blind spots, affecting the accuracy of defect identification. After the inspection, the coupling agent needs to be cleaned up. However, when continuously inspecting multiple weld areas, the coupling agent easily loses water and becomes viscous, which not only increases the cleaning steps but also increases the cleaning difficulty.

[0006] The present invention provides a pipeline detection device based on phased array ultrasound, comprising a shell with an opening at the bottom and a phased array ultrasonic detector installed in the shell. A chain bracket for sleeve-mounting the shell on the outside of the pipeline is provided between the left and right sides of the shell. A self-extrusion coating portion is provided on the left side of the inner cavity of the shell for adaptively adjusting according to the width of the pipeline welding area so as to evenly coat the coupling agent on the outside of the pipeline. The self-extrusion coating portion includes an outer cylinder fixedly connected to the inner cavity of the shell by a fixing rod, and a strip discharge groove is provided at the lower part of the outer cylinder. An arc-shaped filter plate is fixedly connected to the upper part, and two push plugs for adjusting the extrusion width of the coupling agent are symmetrically and slidably connected to the inner cavity of the outer cylinder. The center parts of the two push plugs are fixedly connected to push tubes connected to the inner cavity of the outer cylinder. An injection assembly connected to the two push tubes is installed on the shell. A flattening and widening part for cooperating with the self-extrusion coating part to shape the coated coupling agent is installed in the inner cavity of the shell and located on the right side of the self-extrusion coating part. A scraping mechanism for scraping and collecting the coated coupling agent in time after the detection is completed is provided on the right side of the inner cavity of the shell.

[0007] In one possible implementation, the leveling and widening portion includes a distance adjustment assembly installed between the front and rear cavity walls of the shell, two Z-shaped mounting brackets are slidably installed on the lower part of the distance adjustment assembly, and the lower end surfaces of the mounting brackets are fixedly connected to arc-shaped trimming plates for trimming the edges of the applied coupling agent. The right part of the outer cylinder is fixedly connected to a scraping plate that slides through the two arc-shaped trimming plates through a connecting rod.

[0008] In a possible implementation, the front and rear sides of the shell are rotatably connected to two symmetrically distributed rotating shafts, and one end of the rotating shaft away from the shell is fixedly connected to a roller.

[0009] In one possible implementation, the scraping mechanism includes a collecting box fixedly connected to the right part of the inner cavity of the shell, the upper part of the collecting box is connected to a discharge pipe, a plurality of suction cylinders are equidistantly embedded and fixedly connected to the lower part of the left wall panel of the collecting box, an elastic scraper plate is fixedly connected to the left end face of the collecting box and located directly below the suction cylinder, a fixed plate is fixedly connected to the inside of the suction cylinder, a rotating shaft is rotatably connected to the fixed plate, and an auger is fixedly connected to the outside of the rotating shaft.

[0010] In a possible implementation, a shaft that rotates and passes through the collection box is fixedly connected between the two rotating shafts located on the right and adjacent to each other in front and back, and a bevel gear set is commonly connected to the right end of each rotating shaft and the outside of the shaft.

[0011] In one possible implementation, the injection assembly includes a liquid storage box fixedly connected to the shell, the lower part of the liquid storage box is connected to the pump body, and two flexible delivery tubes corresponding to the push tubes are symmetrically connected to the front and back of the pump body, and the lower ends of the flexible delivery tubes are respectively connected to the push tubes.

[0012] In a possible implementation, the lower portions of the two push tubes are fixedly connected to L-shaped rods, and the adjacent ends of the transverse sections of the two L-shaped rods are fixedly connected to elastic blocks slidably disposed in the strip-shaped discharge groove.

[0013] In one possible implementation, the distance adjustment assembly includes two sliding rods that are symmetrically fixedly connected between the front and rear cavity walls of the shell, and the two sliding rods are externally slidably connected to two sliding bases that are symmetrically distributed front and back. The mounting frames are respectively fixedly connected to the lower end faces of the sliding bases, and the front and rear cavity walls of the shell are jointly rotatably connected with a bidirectional screw threadedly connected to the sliding base, and the front end of the bidirectional screw passes through the front wall panel of the shell, and the front side of the mounting frame is fixedly connected to the outside of the push tube.

[0014] In a possible implementation, the arc-shaped trimming plate is composed of a straight segment plate and an inclined segment plate fixedly connected to the left side of the straight segment plate, and the inclined segment plates in the two arc-shaped trimming plates are arranged in an eight-shaped shape with their openings facing the outer cylinder.

[0015] A pipeline detection method based on phased array ultrasound is completed in conjunction with a pipeline detection device based on phased array ultrasound, and includes the following steps: S1. Installation and positioning: The shell is installed on the outside of the pipeline through a chain bracket, and the position of the shell is adjusted to ensure that the phased array ultrasonic detector is perpendicular to the surface of the pipeline area to be inspected. Then, the chain bracket can be controlled to drive the phased array ultrasonic detector to move along the circumference of the pipeline.

[0016] S2. Coupling agent coating: The coupling agent is automatically extruded and evenly applied to the surface of the pipeline weld area with the help of the self-extrusion coating unit. The coupling agent layer is then scraped and shaped by the flattening and widening components to ensure uniform thickness and complete coverage.

[0017] S3. Phased array scanning: Control the operation of the phased array ultrasonic detector. The ultrasonic sensor in the phased array ultrasonic detector transmits ultrasonic waves according to the preset angle, frequency, and focal depth, scans section by section along the circumference of the pipeline, and collects echoes in real time.

[0018] S4. Image analysis and defect determination: Process the echo image data obtained by scanning, identify the defect signal characteristics, and analyze the parameters of its type, location, length, and depth.

[0019] S5. Result export and archiving: Output the defect analysis results and related images, parameters, and evaluation conclusions into a standard inspection report format for data export and archiving.

[0020] It can be seen from the above technical solutions that the present invention has the following advantages:

[0021] In the present invention, the outer cylinder, the strip discharge groove, the arc-shaped filter plate and the push plug in the self-extrusion coating mechanism are combined to uniformly extrude the coupling agent from the strip discharge groove and coat the surface of the pipe with a constant thickness, thereby ensuring that the acoustic impedance of the coupling agent layer is consistent throughout the entire weld or detection area, thereby stabilizing the ultrasonic echo intensity, avoiding the generation of uncoated areas, reducing detection blind spots, and ensuring that the entire weld area or curved surface detection surface is within the measurable range, thereby ensuring the accuracy and reliability of the detection.

[0022] In the present invention, by combining the flattening and widening portion with the self-extrusion coating portion, after the initial coating of the coupling agent is completed, the excess edge portion is trimmed and the surface is scraped and shaped again, so that the excess coupling agent can be confined to the detection area, preventing it from spreading to the surrounding area and contaminating other detection areas, thereby further improving the accuracy of the detection.

[0023] In the present invention, the scraping mechanism moves synchronously with the self-extrusion coating part along the circumference of the pipeline, so that the coupling agent after detection can be scraped and collected in time. Real-time cleaning can effectively reduce the residual time of the coupling agent, avoid the coupling agent from staying on the pipeline surface for a long time and losing water and becoming viscous, and protect the surface quality of the pipeline.

[0024] In the present invention, the linkage structure of the self-extrusion coating part and the flattening and widening part can be used to adjust the width of the coupling agent during coating and the range of secondary shaping coverage respectively. Flexible and adaptive adjustments can be made according to the area of the pipeline to be inspected, thereby improving the versatility of inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of the pipeline detection device based on phased array ultrasound provided by the present invention.

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell provided by the present invention.

[0028] Figure 3 This is a schematic diagram of the connection structure of the self-extrusion coating part and the flattening and widening part provided by the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of the self-extrusion coating portion provided by the present invention when viewed from above.

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the outer cylinder provided by the present invention.

[0031] Figure 6 This is a schematic cross-sectional structural diagram of the scraping and collecting mechanism provided by the present invention.

[0032] Figure 7 The present invention provides Figure 6 Schematic diagram of the enlarged structure of part A in .

[0033] Figure 8 This is a schematic diagram of the present invention being installed on a pipeline.

[0034] The above drawings include the following reference numerals:

[0035] 1. Shell; 2. Phased array ultrasonic detector; 3. Chain bracket; 4. Self-extrusion coating unit; 41. Outer cylinder; 42. Strip discharge trough; 43. Curved filter plate; 44. Push plug; 45. Push tube; 46. Injection assembly; 461. Liquid storage box; 462. Pump body; 463. Flexible delivery pipe; 47. Elastic stopper; 5. Leveling and widening unit; 51. Pitch adjustment assembly; 511. Slide rod; 512. Sliding base; 513. Bidirectional screw; 52. Mounting frame; 53. Curved trimming plate; 54. Scraping plate; 6. Scraping and collecting mechanism; 61. Collection box; 62. Suction cylinder; 63. Elastic scraping plate; 64. Auger; 65. Shaft; 66. Bevel gear set; 7. Roller. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] See also Figure 1 and Figure 2The present invention provides a technical solution: a pipeline detection device based on phased array ultrasound, comprising a shell 1 with an opening at the bottom and a phased array ultrasonic detector 2 installed in the shell 1, a chain bracket 3 for being installed on the outside of the pipeline is provided between the left and right sides of the shell 1, the chain bracket 3 is composed of a chain belt group and an arc-shaped connecting plate, the left and right sides of the shell 1 are hinged with chain belt groups, the lower part of the chain belt group can be detachably connected with an arc-shaped connecting plate, the lower part of the two arc-shaped connecting plates is detachably connected with another chain belt group, and the chain belt group is composed of several It consists of a number of equally spaced chain blocks hinged together and a rotating wheel rotatably connected to the front and rear sides of each chain block. The left part of the inner cavity of the shell 1 is provided with a self-extrusion coating part 4 for adaptively adjusting according to the width of the pipeline welding area so as to evenly coat the coupling agent on the outside of the pipeline. The inner cavity of the shell 1 and the right part of the self-extrusion coating part 4 are provided with a flattening and widening part 5 for cooperating with the self-extrusion coating part 4 to shape the coated coupling agent. The right part of the inner cavity of the shell 1 is provided with a scraping mechanism 6 for scraping and collecting the coated coupling agent in time after the detection is completed.

[0038] See also Figure 2 、 Figure 3 、 Figure 4 and Figure 5 In this embodiment, the self-extrusion coating unit 4 includes an outer cylinder 41 fixedly connected to the inner cavity of the shell 1 by a fixing rod. A strip discharge groove 42 is provided at the lower part of the outer cylinder 41. An arc filter plate 43 is fixedly connected to the upper part of the strip discharge groove 42. Two push plugs 44 for adjusting the extrusion width of the coupling agent are symmetrically slidably connected to the inner cavity of the outer cylinder 41. The center parts of the two push plugs 44 are fixedly connected to a push tube 45 connected to the inner cavity of the outer cylinder 41. The shell 1 is equipped with a push tube 45 connected to the two push tubes 45. The injection assembly 46 has an L-shaped rod fixedly connected to the lower part of the two push tubes 45, and the proximal ends of the transverse sections of the two L-shaped rods are fixedly connected to elastic blocks 47 slidably set in the strip discharge groove 42. The injection assembly 46 includes a liquid storage box 461 fixedly connected to the shell 1, and the lower part of the liquid storage box 461 is connected to the pump body 462. The pump body 462 has two flexible delivery tubes 463 corresponding to the push tubes 45 symmetrically connected to the front and back, and the lower ends of the flexible delivery tubes 463 are respectively connected to the push tubes 45.

[0039] See also Figure 3 The flattening and widening portion 5 includes a distance adjustment component 51 installed between the front and rear walls of the shell 1. Two Z-shaped mounting brackets 52 are slidably installed at the lower part of the distance adjustment component 51. The lower end surfaces of the mounting brackets 52 are fixedly connected to arc-shaped trimming plates 53 for trimming the edges of the applied coupling agent. The right part of the outer cylinder 41 is fixedly connected to a scraping plate 54 sliding through the two arc-shaped trimming plates 53 through a connecting rod. The arc-shaped trimming plates 53 are composed of a straight segment plate and an inclined segment plate fixedly connected to the left side of the straight segment plate. The inclined segment plates of the two arc-shaped trimming plates 53 are distributed in an eight-shaped shape with their openings facing the outer cylinder 41.

[0040] See also Figure 3 The distance adjustment component 51 includes two sliding rods 511 symmetrically fixedly connected between the front and rear cavity walls of the shell 1. The two sliding rods 511 are slidably connected to the outside of two sliding bases 512 symmetrically distributed front and back. The mounting brackets 52 are respectively fixedly connected to the lower end surfaces of the sliding bases 512. A bidirectional screw 513 threadedly connected to the sliding base 512 is rotatably connected between the front and rear cavity walls of the shell 1, and the front end of the bidirectional screw 513 passes through the front wall plate of the shell 1. The front side of the mounting bracket 52 is fixedly connected to the outside of the push tube 45.

[0041] Before testing, first inject the coupling agent into the liquid storage box 461, then place the shell 1 on the pipe welding area, then fit the two chain belt groups at the top on the pipe surface, then clamp the two arc-shaped connecting plates to the lower parts of the two upper chain belt groups, and finally clamp the third chain belt group to the lower parts of the two arc-shaped connecting plates respectively, and then the shell 1 can be placed on the outside of the pipe; then manually rotate the bidirectional screw 513 according to the width of the pipe welding area, and the bidirectional screw 513 then drives the sliding base 512 to move, and the sliding base 512 then drives the mounting frame 52 Move, the mounting frame 52 drives the arc trimming plate 53 and the pushing tube 45 to move respectively, adjusts the spacing between the two arc trimming plates 53 to be consistent with the width of the pipeline welding area, and the pushing tube 45 drives the push plug 44 to move, so that the spacing between the two push plugs 44 is also consistent with the width of the pipeline welding area. The pushing tube 45 moves horizontally and drives the elastic stopper 47 to move through the L-shaped rod, so that the two elastic stoppers 47 and the push plugs 44 are kept synchronously adjusted. The shell 1 is sleeved on the outside of the pipeline so that the elastic stopper 47 touches the outer wall of the pipeline, and there is a distance between the strip discharge groove 42 and the outer wall of the pipeline.

[0042] Then, the housing 1 is pushed manually or by an external driving device to move circumferentially along the outer wall of the pipeline, while the pump body 462 is controlled to operate to pump the coupling agent from the liquid storage box 461 into the flexible delivery tube 463, and then the coupling agent is pumped into the inner cavity of the outer cylinder 41 through the push tube 45. When the outer cylinder 41 is full of coupling agent, the coupling agent will be squeezed out from the arc filter plate 43 into the strip discharge groove 42, and then squeezed and coated on the surface of the pipeline. The distance between the strip discharge groove 42 and the pipeline surface is used to ensure that the thickness of the coupling agent coated on the pipeline surface is consistent. Then, the housing 1 drives the arc trimming plate 53 to pass through the front and rear sides of the coated coupling agent, and uses the arc segment plate in the arc trimming plate 53 to push the coupling agent that flows out from the front and rear sides to the middle to gather, and then uses the straight segment part of the arc trimming plate 53 to block the edge of the coated coupling agent again to ensure that the width of the coated coupling agent is consistent.

[0043] The movement of the curved trimming plate 53 simultaneously drives the scraping plate 54 to move. The scraping plate 54 passes through the surface of the coated coupling agent to perform a smoothing process. Then, the housing 1 drives the phased array ultrasonic detector 2 to pass through the smoothed coupling agent surface to emit sound waves on the surface of the pipeline weld to detect.

[0044] See also Figure 1 、 Figure 2 、 Figure 6 and Figure 7 In this embodiment, the front and rear sides of the shell 1 are rotatably connected to two symmetrically distributed rotating shafts, and the end of the rotating shaft away from the shell 1 is fixedly connected to a roller 7. The scraping mechanism 6 includes a collecting box 61 fixedly connected to the right part of the inner cavity of the shell 1, and the upper part of the collecting box 61 is connected to a discharge pipe. The lower part of the left wall panel of the collecting box 61 is equidistantly embedded and fixedly connected to several suction cylinders 62. An elastic scraper plate 63 is fixedly connected to the left end surface of the collecting box 61 and directly below the suction cylinder 62. The inside of the suction cylinder 62 is fixedly connected to a fixed plate, and a rotating shaft is rotatably connected to the fixed plate. The outside of the rotating shaft is fixedly connected to an auger 64. A shaft 65 that rotates and passes through the collecting box 61 is fixedly connected between the two rotating shafts located on the right and adjacent to each other. The right end of each rotating shaft and the outside of the shaft 65 are commonly connected to a bevel gear set 66 for transmission.

[0045] The housing 1 moves along the outer circumference of the pipe and drives the collection box 61 to move synchronously. The collection box 61 drives the elastic scraper plate 63 to move along the surface of the pipe. After detection, the coupling agent is scooped up in time. The scooped coupling agent is then moved to the left port of the suction cylinder 62. The roller 7 rolls along the surface of the pipe along with the moving housing 1. The roller 7 on the right side drives the shaft 65 to rotate through the rotating shaft. The shaft 65 then drives the rotating shaft to rotate through the bevel gear set 66. The rotating shaft then drives the auger 64 to rotate. The auger 64 then sucks the coupling agent moved to the left port of the suction cylinder 62 into the collection box 61, so that the coupling agent can be scraped and collected in time.

[0046] In addition, the present invention also provides a pipeline detection method based on phased array ultrasound, including the following steps: S1, installation and positioning: the shell 1 is installed on the outside of the pipeline through the chain bracket 3, and the position of the shell 1 is adjusted to ensure that the phased array ultrasonic detector 2 is perpendicular to the surface of the pipeline to be inspected. Then, the chain bracket 3 can be controlled to drive the phased array ultrasonic detector 2 to move along the circumference of the pipeline.

[0047] S2. Coupling agent coating: The coupling agent is automatically extruded and evenly applied to the surface of the pipeline weld area by means of the self-extrusion coating unit 4. The coupling agent layer is then scraped and shaped by the flattening and widening unit 5 to ensure uniform thickness and complete coverage.

[0048] S3. Phased array scanning: Control the phased array ultrasonic detector 2 to operate, emit ultrasonic waves according to the preset angle, frequency, and focal depth, scan along the circumference of the pipeline section by section, and collect echoes in real time.

[0049] S4. Image analysis and defect determination: Process the echo image data obtained by scanning, identify the defect signal characteristics, and analyze the parameters of its type, location, length, and depth.

[0050] S5. Result export and archiving: Output the defect analysis results and related images, parameters, and evaluation conclusions into a standard inspection report format for data export and archiving.

[0051] The detection principle of the phased array ultrasonic detector 2 is an existing technology and will not be described in detail.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipeline inspection device based on phased array ultrasound, comprising a housing with an opening at the bottom and a phased array ultrasound detector mounted in the housing. Chain brackets for mounting the device on the outside of a pipeline are provided between the left and right sides of the housing. The device is characterized by: The left part of the inner cavity of the housing is provided with a self-extruding coating portion for adaptively adjusting according to the width of the pipeline welding area so as to evenly coat the coupling agent on the outside of the pipeline; The self-extrusion coating unit includes an outer cylinder fixedly connected to the inner cavity of the shell by a fixing rod, a strip-shaped discharge groove is formed at the lower portion of the outer cylinder, and an arc-shaped filter plate is fixedly connected to the upper portion of the strip-shaped discharge groove. Two push plugs for adjusting the extrusion width of the coupling agent are symmetrically and slidably connected to the inner cavity of the outer cylinder. The center portions of the two push plugs are fixedly connected to a push tube connected to the inner cavity of the outer cylinder, and an injection assembly connected to the two push tubes is installed on the shell. The inner cavity of the shell is located on the right side of the self-extrusion coating part, and a flattening and widening part is installed for cooperating with the self-extrusion coating part to shape the coated coupling agent. The right side of the inner cavity of the shell is provided with a scraping mechanism for scraping and collecting the coated coupling agent in time after the detection is completed.

2. The pipeline detection device based on phased array ultrasound according to claim 1, characterized in that: The leveling and widening portion includes a distance adjustment component installed between the front and rear cavity walls of the shell. Two Z-shaped mounting brackets are slidably installed on the lower part of the distance adjustment component. The lower end surfaces of the mounting brackets are fixedly connected to arc-shaped trimming plates for trimming the edges of the applied coupling agent. The right part of the outer cylinder is fixedly connected to a scraping plate that slides through the two arc-shaped trimming plates through a connecting rod.

3. The pipeline detection device based on phased array ultrasound according to claim 1, characterized in that: The front and rear sides of the shell are both rotatably connected to two symmetrically distributed rotating shafts, and one end of the rotating shaft away from the shell is fixedly connected to a roller.

4. The pipeline detection device based on phased array ultrasound according to claim 3, characterized in that: The scraping and collecting mechanism includes a collecting box fixedly connected to the right part of the inner cavity of the shell, the upper part of the collecting box is connected to a discharge pipe, a plurality of suction cylinders are equidistantly embedded and fixedly connected to the lower part of the left wall panel of the collecting box, an elastic scraper plate is fixedly connected to the left end surface of the collecting box and located directly below the suction cylinder, a fixed plate is fixedly connected to the inside of the suction cylinder, a rotating shaft is rotatably connected to the fixed plate, and an auger is fixedly connected to the outside of the rotating shaft.

5. The pipeline detection device based on phased array ultrasound according to claim 4, characterized in that: A shaft that rotates and passes through the collection box is fixedly connected between the two rotating shafts located on the right and adjacent to each other. The right end of each rotating shaft is connected to the outside of the shaft by a bevel gear set.

6. The pipeline detection device based on phased array ultrasound according to claim 1, characterized in that: The injection assembly includes a liquid storage box fixedly connected to the shell, the lower part of the liquid storage box is connected to the pump body, and the pump body is symmetrically connected to two flexible delivery tubes corresponding to the push tubes, and the lower ends of the flexible delivery tubes are respectively connected to the push tubes.

7. The pipeline detection device based on phased array ultrasound according to claim 1, characterized in that: The lower parts of the two pushing tubes are fixedly connected with an L-shaped rod, and the adjacent ends of the transverse sections of the two L-shaped rods are fixedly connected with elastic blocks slidably arranged in the strip-shaped discharge groove.

8. The pipeline detection device based on phased array ultrasound according to claim 2, characterized in that: The distance adjustment assembly includes two sliding rods that are symmetrically fixedly connected between the front and rear cavity walls of the shell. The two sliding rods are slidably connected to the outside of two sliding bases that are symmetrically distributed front and back. The mounting frames are respectively fixedly connected to the lower end surfaces of the sliding bases. A bidirectional screw threadedly connected to the sliding base is rotatably connected between the front and rear cavity walls of the shell, and the front end of the bidirectional screw passes through the front wall plate of the shell. The front side of the mounting frame is fixedly connected to the outside of the push tube.

9. The pipeline detection device based on phased array ultrasound according to claim 2, characterized in that: The arc trimming plate is composed of a straight segment plate and an inclined segment plate fixedly connected to the left side of the straight segment plate. The inclined segment plates in the two arc trimming plates are distributed in an eight-shaped shape with their openings facing the outer cylinder.

10. A pipeline detection method based on phased array ultrasound, characterized in that: The pipeline inspection device based on phased array ultrasound according to claim 1 is used for the purpose of completing the process, and includes the following steps: S1, installation and positioning: installing the housing on the outside of the pipeline using a chain bracket, and adjusting the position of the housing to ensure that the phased array ultrasound detector is perpendicular to the surface of the inspected area of the pipeline, and then controlling the chain bracket to drive the phased array ultrasound detector to move along the circumference of the pipeline; S2. Coupling agent coating: The coupling agent is automatically extruded and evenly applied to the surface of the pipeline weld area using a self-extrusion coating unit. The coupling agent layer is then scraped and shaped using a flattening and widening component to ensure uniform thickness and complete coverage. S3, Phased array scanning: Control the operation of the phased array ultrasonic detector, emit ultrasonic waves according to the preset angle, frequency, and focal depth, scan along the circumference of the pipeline section by section, and collect echoes in real time; S4. Image analysis and defect determination: Process the echo image data obtained by scanning, identify the defect signal characteristics, and analyze the parameters of its type, location, length, and depth; S5. Result export and archiving: Output the defect analysis results and related images, parameters, and evaluation conclusions into a standard inspection report format for data export and archiving.

Images