Nondestructive testing device for circumferential weld of pipe

Abstract

The invention relates to the technical field of pipe nondestructive testing, and discloses a pipe circumferential weld nondestructive testing device which comprises a base, an ultrasonic probe, a pipe fitting, a U-shaped frame, a rotary clamping piece and a driving piece. The rotary clamping piece is installed on the base and used for clamping a pipe fitting, the U-shaped frame is arranged above the base and driven by the driving piece to move up and down, and when the rotary clamping piece rotates, the driving piece rotates along with the rotary clamping piece so as to drive the U-shaped frame to move up and down in a reciprocating mode; and two elastic sensing modules are symmetrically mounted on the U-shaped frame. Through automatic coupling agent smearing and annular detection of the ultrasonic probe, the problems of non-uniform manual smearing and limitation of traditional single-probe detection are solved, the smearing sensing module collects surface data of the pipe fitting, misjudgment is avoided through preprocessing, the ultrasonic probe achieves position compensation through the elastic sensing module and the laser distance measuring piece, and the detection accuracy is improved. Accurate signal receiving is ensured, comprehensiveness, accuracy and reliability of welding seam detection are improved, and risks of missing detection and misjudgment are reduced.

Description

Technical Field

[0001] This invention relates to the field of non-destructive testing technology for pipes, and in particular to a non-destructive testing device for circumferential welds of pipes. Background Technology

[0002] An ultrasonic flaw detector is a non-destructive testing instrument that can detect internal defects in an object without damaging it. It utilizes the propagation characteristics of ultrasonic waves within materials to detect internal defects. It emits high-frequency ultrasonic pulses into the object being tested. When these ultrasonic waves encounter internal defects, they are reflected, refracted, or scattered. The instrument receives these returned ultrasonic signals and determines the location, size, and nature of the defects based on the signal characteristics. Currently, in the inspection of circumferential welds in pipelines, an ultrasonic probe is typically moved along the weld, and changes in the signal on the instrument are observed to determine whether defects exist. When inspecting circumferential welds in pipelines, inspectors typically need to apply a coupling agent around the weld and then move an ultrasonic probe back and forth around it to find the longest wavelength to determine the location and depth of welding defects. Because manual operation makes it difficult to ensure the stability of the probe's movement speed and the consistency of its movement path, unstable probe movement and inconsistent paths often occur. This causes changes in the incident angle and position of the ultrasonic waves, which in turn affects the signal reception quality, making it difficult to accurately identify defect signals and reducing the accuracy and reliability of the inspection results.

[0003] To address the aforementioned issues, this application proposes a non-destructive testing device for circumferential welds in pipes. Summary of the Invention

[0004] This invention proposes a non-destructive testing device for circumferential welds in pipes, which solves the problem in related technologies where manual operation makes it difficult to ensure the stability of the probe's moving speed and the consistency of its moving path, leading to changes in the incident angle and position of ultrasonic waves, making it difficult to accurately identify defect signals and reducing the accuracy and reliability of the test results.

[0005] The present invention proposes a non-destructive testing device for circumferential welds of pipes, comprising a base, an ultrasonic probe, pipe fittings, a U-shaped frame, a rotating clamping component, and a driving component; The rotating clamp is mounted on the base and is used to clamp the pipe. The U-shaped frame is set above the base and is driven to move up and down by the drive component. When the rotating clamp rotates, the drive component rotates accordingly to drive the U-shaped frame to move up and down reciprocally. Two elastic sensing modules are symmetrically installed on the U-shaped frame. The pipe is located between the two elastic sensing modules. An ultrasonic probe is installed on each adjacent side of the two elastic sensing modules. The distance between the two elastic sensing modules is adjustable. Each elastic sensing module includes a built-in first pressure sensor. An adjustable application sensing module is mounted on the bottom of one of the elastic sensing modules, and the application sensing module is used to apply coupling agent to the pipe fitting. The application sensing module includes a built-in second pressure sensor.

[0006] As a further optimization of the present invention, the U-shaped frame has two symmetrically arranged sliding openings, and each of the two elastic sensing modules is equipped with a sliding rod. The two sliding rods pass through the two sliding openings respectively, and a laser rangefinder is installed on the back of the U-shaped frame facing the sliding rod. The laser rangefinder includes a mounting block and a laser rangefinder. The mounting block is mounted on the back of the U-shaped frame, and laser rangefinders are mounted on both sides of the mounting block. The two laser rangefinders face the two sliding rods respectively.

[0007] As a further optimization of the present invention, the elastic sensing module further includes an elastic abutment and an elastic insert. Electric push rods are installed on both sides of the U-shaped frame. The two elastic abutments are respectively connected to the two electric push rods and are driven by the two electric push rods to change the distance between them. The first pressure sensor is installed in the elastic abutment. The elastic insert is inserted into the elastic abutment and abuts against the first pressure sensor. The ultrasonic probe is installed on the side of the elastic insert near the pipe.

[0008] As a further optimization of the present invention, the elastic abutment includes an assembly block and an abutment block. The two assembly blocks are respectively connected to two electric push rods. Connecting rods are slidably connected around the circumference of the assembly block. The abutment block is connected to the connecting rods around the circumference of the assembly block. A first spring is sleeved on the connecting rod, and the two ends of the first spring are respectively connected to the assembly block and the abutment block. A first insertion cavity is opened in the abutment block. The first pressure sensor is installed in the first insertion cavity. The elastic plug is inserted into the first insertion cavity and abuts against the first pressure sensor. The two sliding rods are respectively connected to the two abutment blocks.

[0009] As a further optimization of the present invention, the elastic plug includes a first insert rod, a loading plate, and a second spring. The first insert rod is inserted into a first insertion cavity and abuts against a first pressure sensor. The loading plate is installed at one end of the first insert rod near the pipe. The second spring is sleeved on the first insert rod, and both ends of the second spring are respectively connected to the abutting block and the loading plate. An insertion hole is opened in the loading plate. A connecting rod inserted into the insertion hole is installed on the ultrasonic probe. A bolt that abuts against the connecting rod is threaded on the loading plate. Two ultrasonic flaw detectors are installed on the U-shaped frame. Cables are connected to both ultrasonic flaw detectors, and the two cables are respectively connected to the two ultrasonic probes.

[0010] As a further optimization of the present invention, the application sensing module further includes an elastic application element, a fixing block and an electric guide rail. An electric guide rail is installed at the bottom of one of the contact blocks, and a fixing block is installed at the drive end of the electric guide rail. A second insertion cavity is opened in the fixing block, and the second pressure sensor is installed in the second insertion cavity. The elastic application element is inserted into the second insertion cavity and abuts against the second pressure sensor. The U-shaped frame is equipped with a feeding assembly for supplying coupling agent to the elastic coating component.

[0011] As a further optimization of the present invention, the elastic applicator includes an applicator block, a second insert rod, and a third spring. The second insert rod is inserted into a second cavity and abuts against a second pressure sensor. The applicator block is installed at one end of the second insert rod near the tube. The third spring is sleeved on the second insert rod, and both ends of the second insert rod are respectively connected to a fixing block and an applicator block. A cavity is formed inside the applicator block, and the feeding component communicates with the cavity. A plurality of applicator holes communicating with the cavity are formed on the side of the applicator block near the tube.

[0012] As a further optimization of the present invention, the feeding assembly includes a feeding cylinder, which is installed at the bottom of the U-shaped frame. The feeding cylinder contains a coupling agent, and a pump is installed at the bottom of the feeding cylinder. The outlet end of the pump is connected to a conduit, and one end of the conduit communicates with the cavity inside the coating block. An inlet shaft is connected to the feeding cylinder.

[0013] As a further optimization of the present invention, the rotating clamping member includes a motor and a clamping plate, the base has an installation chamber, the motor is installed in the installation chamber, the output end of the motor is connected to the clamping plate, and the pipe is clamped on the clamping plate; The driving component includes an assembly cylinder, a cylinder, a reciprocating lead screw, and a limiting rod. The assembly cylinder is rotatably mounted on the base and located on one side of the clamp. The cylinder is mounted on the assembly cylinder, and the driving end of the cylinder is connected to the reciprocating lead screw. Two limiting rods are symmetrically mounted on the base. The U-shaped frame is sleeved on the reciprocating lead screw and the two limiting rods. The U-shaped frame is threadedly engaged with the reciprocating lead screw, and the U-shaped frame is slidably engaged with the two limiting rods. A drive gear is fixedly mounted on the chuck, and a driven gear that meshes with the drive gear is fixedly mounted on the assembly cylinder.

[0014] As a further optimization of the present invention, the controller is connected to a motor, a cylinder, an electric push rod, a first pressure sensor, a second pressure sensor, a laser rangefinder, an extraction pump, and an ultrasonic flaw detector.

[0015] The above-described technical solution of the present invention has the following beneficial technical effects: 1. This invention uses a driving component to move the coating sensing module at the bottom of the elastic sensing module to the location of the pipe weld, driven by a U-shaped frame. The coating sensing module is then adjusted to move at the bottom of the elastic sensing module, bringing it into contact with the pipe. The pipe is then rotated by a rotating clamp, causing the driving component to follow the rotation and move the U-shaped frame up and down. This allows the coating sensing module to evenly apply the coupling agent around the pipe weld. This automated application method avoids the uneven thickness of the coupling agent caused by inconsistent techniques during manual application, providing a better foundation for subsequent ultrasonic testing. The coupling conditions ensure that ultrasonic waves can propagate and be received stably and effectively, thereby improving the quality and reliability of the detection signal. When the coating sensing module is in contact with the outer periphery of the pipe, the second pressure sensor in the coating sensing module can collect data on the unevenness of the outer periphery of the pipe in advance. This preprocessing step allows the detection system to understand the actual situation of the pipe surface in advance, providing a reference for the subsequent ultrasonic probe detection, which helps to more accurately identify and analyze weld defect signals, avoid misjudgment or omission caused by unevenness of the pipe surface, and further improve the accuracy of the detection results. 2. This invention, after collecting data on the outer periphery of the pipe fitting through the coating sensing module, uses a driving component to move the ultrasonic probe on the elastic sensing module to the position on the pipe fitting coated with coupling agent via a U-shaped frame. Then, the two elastic sensing modules are brought closer together, causing the ultrasonic probes on each module to contact both sides of the pipe fitting. The first pressure sensor within the elastic sensing module monitors the contact force between the ultrasonic probe and the rotating clamp in real time, allowing for timely adjustment of the elastic sensing module to maintain the contact force between the ultrasonic probe and the pipe fitting within a suitable range. The pipe fitting is then rotated by the rotating clamp, and the driving component rotates accordingly during this process. The U-shaped frame moves up and down reciprocally, and the ultrasonic probes on the two elastic sensing modules move up and down reciprocally around the weld seam of the pipe fitting, realizing a circular detection of the weld seam position. This invention uses two ultrasonic probes to detect the weld seam on the pipe fitting from different angles, more comprehensively covering the weld seam area, effectively avoiding the detection blind spots that may occur when using a traditional single ultrasonic probe, improving the comprehensiveness and integrity of weld seam detection, and reducing the risk of missed detection. At the same time, the first pressure sensor monitors and adjusts the contact force between the ultrasonic probe and the pipe fitting in real time to ensure the stability and consistency of the contact between the ultrasonic probe and the pipe fitting, thereby improving the accuracy and reliability of weld seam detection and effectively reducing the risk of missed detection and misjudgment. 3. When the ultrasonic probe on the elastic sensing module of this invention moves back and forth along the pipe, the unevenness of the pipe surface will transmit the reaction force to the elastic sensing module through the ultrasonic probe, causing the elastic sensing module to move elastically. When the elastic sensing module moves, it drives the sliding rod on it to slide within the sliding opening. The distance moved by the sliding rod can be monitored in real time by the laser rangefinder on the U-shaped frame. This invention can promptly understand the slight changes in the position of the ultrasonic probe through the laser rangefinder. Based on the distance change data measured by the laser rangefinder, the ultrasonic signal reception can be compensated accordingly, reducing the signal reception deviation caused by the change in the position of the ultrasonic probe. Even when there is unevenness on the pipe surface, the accurate reception and processing of ultrasonic signals can be ensured, further improving the reliability and accuracy of the detection results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a non-destructive testing device for pipe annular welds proposed in this invention.

[0017] Figure 2 This is a schematic diagram of the back structure of a non-destructive testing device for pipe annular welds proposed in this invention.

[0018] Figure 3 This is a schematic diagram of the structure of the elastic sensing module of the present invention.

[0019] Figure 4This is a schematic diagram of the internal structure of the contact block of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the elastic plug-in of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the coating sensing module of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the elastic coating component of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the laser rangefinder of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the rotating clamping component and the driving component of the present invention.

[0025] Figure 10 This is a schematic diagram of the ultrasonic flaw detector and ultrasonic probe of the present invention.

[0026] Reference numerals: 1. Base; 101. Ultrasonic probe; 1011. Connecting rod; 102. Pipe fitting; 103. U-shaped frame; 104. Sliding mouth; 105. Driving gear; 106. Driven gear; 107. Controller; 2. Rotary clamping component; 21. Motor; 22. Clamping plate; 3. Driving component; 31. Assembly cylinder; 32. Cylinder; 33. Reciprocating lead screw; 34. Limiting rod; 4. Elastic sensing module; 401. Electric push rod; 402. Sliding rod; 41. Elastic abutment component; 411. Assembly block; 412. Abutment block; 413. Connecting rod; 414. First spring; 42 421. Elastic insert; 422. First insert rod; 423. Loading tray; 424. Second spring; 425. Bolt; 43. First pressure sensor; 5. Coating sensing module; 51. Elastic coating component; 511. Coating block; 512. Second insert rod; 513. Third spring; 514. Coating hole; 52. Second pressure sensor; 53. Fixing block; 54. Electric guide rail; 6. Laser rangefinder; 61. Mounting block; 62. Laser rangefinder; 7. Supply assembly; 71. Supply cylinder; 72. Extraction pump; 73. Conduit; 74. Inlet shaft; 8. Ultrasonic flaw detector; 81. Cable. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0028] like Figure 1-10As shown, the present invention proposes a non-destructive testing device for pipe annular welds, comprising a base 1, an ultrasonic probe 101, a pipe fitting 102, a U-shaped frame 103, a rotating clamping component 2, and a driving component 3; The rotating clamp 2 is mounted on the base 1 and is used to clamp the pipe 102. The U-shaped frame 103 is set above the base 1 and is driven to move up and down by the drive member 3. When the rotating clamp 2 rotates, the drive member 3 rotates accordingly to drive the U-shaped frame 103 to move up and down reciprocally. Two elastic sensing modules 4 are symmetrically installed on the U-shaped frame 103. The pipe 102 is located between the two elastic sensing modules 4. An ultrasonic probe 101 is installed on each adjacent side of the two elastic sensing modules 4. The distance between the two elastic sensing modules 4 is adjustable. The elastic sensing module 4 includes a first pressure sensor 43 installed inside. An adjustable application sensing module 5 is mounted on the bottom of an elastic sensing module 4, and the application sensing module 5 is used to apply coupling agent to the pipe 102. The application sensing module 5 includes a built-in second pressure sensor 52.

[0029] This invention uses a drive unit 3 to push a U-shaped frame 103 up and down, so that the coating sensing module 5 reaches the weld position of the pipe fitting 102. The position of the coating sensing module 5 is adjusted so that it contacts the pipe fitting 102. At this time, the rotating clamp 2 starts to rotate, driving the pipe fitting 102 to rotate. At the same time, the drive unit 3 follows the rotation, causing the U-shaped frame 103 to move up and down reciprocally. This allows the coating sensing module 5 to evenly apply the coupling agent around the weld of the pipe fitting 102. This automated coating process solves the problem of uneven coating by manual coating, ensures good coupling conditions during ultrasonic testing, and improves the reliability of the detection signal. During the coating process, the second pressure sensor 52 in the coating sensing module 5 collects data on the unevenness of the outer periphery of the pipe fitting 102, providing a reference for the subsequent ultrasonic probe 101 detection, reducing misjudgments caused by the unevenness of the pipe fitting 102 surface, and improving detection accuracy. After the coating is applied, the drive unit 3 moves the U-shaped frame 103, causing the ultrasonic probe 101 on the elastic sensing module 4 to reach the position coated with coupling agent. The two elastic sensing modules 4 move closer to each other, causing the ultrasonic probe 101 to contact the two sides of the pipe 102. The rotating clamp 2 rotates the pipe 102 again, and the drive unit 3 moves the U-shaped frame 103 up and down, allowing the ultrasonic probe 101 to move up and down along the weld seam to achieve ring detection. The first pressure sensor 43 in the elastic sensing module 4 monitors the contact force between the ultrasonic probe 101 and the pipe 102 in real time, and adjusts it in time to ensure stable contact, improve detection accuracy, and reduce the risk of missed detection and misjudgment.

[0030] like Figure 2 and Figure 8As shown, in this embodiment, the U-shaped frame 103 has two symmetrically arranged sliding openings 104, and each of the two elastic sensing modules 4 is equipped with a sliding rod 402. The two sliding rods 402 pass through the two sliding openings 104 respectively, and a laser rangefinder 6 is installed on the back of the U-shaped frame 103 facing the sliding rod 402. The laser rangefinder 6 includes a mounting block 61 and a laser rangefinder 62. The mounting block 61 is mounted on the back of the U-shaped frame 103, and the laser rangefinder 62 is mounted on both sides of the mounting block 61. The two laser rangefinders 62 face the two slide bars 402 respectively.

[0031] When the ultrasonic probe 101 on the elastic sensing module 4 is displaced due to the unevenness of the pipe fitting 102, the elastic sensing module 4 will drive the slide bar 402 to slide within the sliding port 104. The distance moved by the slide bar 402 can be measured in real time by the laser rangefinders 62 on both sides of the mounting block 61. Based on this data, the slight changes in the position of the ultrasonic probe 101 can be understood in a timely manner, and then the ultrasonic signal reception can be compensated to reduce the signal reception deviation. Even if the surface of the pipe fitting 102 is uneven, the detection results can still be guaranteed to be accurate and reliable.

[0032] like Figure 3 and Figure 4 As shown, in this embodiment, the elastic sensing module 4 also includes an elastic contact 41 and an elastic insert 42. Electric push rods 401 are installed on both sides of the U-shaped frame 103. The two elastic contact 41 are respectively connected to the two electric push rods 401, and the distance between them is changed by the two electric push rods 401. The first pressure sensor 43 is installed in the elastic contact 41. The elastic insert 42 is inserted into the elastic contact 41 and abuts against the first pressure sensor 43. The ultrasonic probe 101 is installed on the side of the elastic insert 42 near the pipe 102.

[0033] The electric push rods 401 on both sides of the U-shaped frame 103 are activated, pushing the elastic abutment 41 to move and changing the distance between the two elastic abutment 41, thereby adjusting the contact position between the ultrasonic probe 101 and the pipe 102. The first pressure sensor 43 is installed in the elastic abutment 41. When the ultrasonic probe 101 contacts the pipe 102, it can monitor the contact force in real time. The elastic plug 42 is inserted into the elastic abutment 41 and contacts the first pressure sensor 43, which plays the role of transmitting pressure and fixing the ultrasonic probe 101, ensuring that the position of the ultrasonic probe 101 is stable and the detection data is accurate during the detection process.

[0034] like Figure 4As shown, in this embodiment, the elastic abutment 41 includes an assembly block 411 and an abutment block 412. The two assembly blocks 411 are respectively connected to two electric push rods 401. Connecting rods 413 are slidably connected around the assembly block 411. The abutment block 412 is connected to the connecting rods 413 around the assembly block 411. A first spring 414 is sleeved on the connecting rod 413, and the two ends of the first spring 414 are respectively connected to the assembly block 411 and the abutment block 412. A first insertion cavity is opened in the abutment block 412. A first pressure sensor 43 is installed in the first insertion cavity. An elastic insert 42 is inserted into the first insertion cavity and abuts against the first pressure sensor 43. Two sliding rods 402 are respectively connected to the two abutment blocks 412.

[0035] The electric push rod 401 pushes the assembly block 411 to move, and the assembly block 411 drives the contact block 412 to move through the connecting rod 413. The first spring 414 plays a buffering and adjusting role, so that the ultrasonic probe 101 on the elastic plug 42 can contact the pipe 102 more stably. The first pressure sensor 43 inside the contact block 412 monitors the contact force. The slide rod 402 is connected to the contact block 412 and slides in the sliding mouth 104 as the contact block 412 moves, which facilitates the monitoring of the laser rangefinder 6. This structural design enhances the stability and adaptability of the elastic sensing module 4 and improves the reliability of the detection.

[0036] like Figure 2 , Figure 4 , Figure 5 and Figure 10 As shown, in this embodiment, the elastic insert 42 includes a first insert rod 421, a loading plate 422, and a second spring 423. The first insert rod 421 is inserted into the first insertion cavity and abuts against the first pressure sensor 43. The loading plate 422 is installed on the end of the first insert rod 421 near the pipe fitting 102. The second spring 423 is sleeved on the first insert rod 421, and the two ends of the second spring 423 are respectively connected to the abutting block 412 and the loading plate 422. An insertion hole is opened in the loading plate 422. A connecting rod 1011 inserted into the insertion hole is installed on the ultrasonic probe 101. A bolt 424 that abuts against the connecting rod 1011 is threaded on the loading plate 422. Two ultrasonic flaw detectors 8 are installed on the U-shaped frame 103. Cables 81 are connected to both ultrasonic flaw detectors 8. The two cables 81 are respectively connected to the two ultrasonic probes 101.

[0037] The first insertion rod 421 is inserted into the first insertion cavity of the contact block 412 and contacts the first pressure sensor 43 to transmit the pressure of the ultrasonic probe 101. The loading plate 422 is installed at one end of the first insertion rod 421. The second spring 423 is sleeved on the first insertion rod 421 to provide a buffering effect. The ultrasonic probe 101 is inserted into the insertion hole of the loading plate 422 through the connecting rod 1011 and is secured with bolts 424. When disassembling the ultrasonic probe 101, simply loosen the bolts 424. The ultrasonic flaw detector 8 on the U-shaped frame 103 is connected to the ultrasonic probe 101 through the cable 81 and can receive the detection signal. This structure ensures that the ultrasonic probe 101 is firmly installed and can flexibly adapt to changes in the surface of the pipe fitting 102, ensuring stable transmission of the detection signal.

[0038] like Figure 1 , Figure 6 and Figure 7 As shown, in this embodiment, the application sensing module 5 also includes an elastic application element 51, a fixing block 53 and an electric guide rail 54. An electric guide rail 54 is installed at the bottom of a contact block 412, and a fixing block 53 is installed at the drive end of the electric guide rail 54. A second insertion cavity is opened in the fixing block 53, and a second pressure sensor 52 is installed in the second insertion cavity. The elastic application element 51 is inserted into the second insertion cavity and abuts against the second pressure sensor 52. A supply assembly 7 for supplying coupling agent to the elastic applicator 51 is installed on the U-shaped frame 103.

[0039] The electric guide rail 54 at the bottom of the contact block 412 is activated, which drives the fixed block 53 to move, thereby adjusting the position of the elastic coating part 51. The second pressure sensor 52 inside the fixed block 53 monitors the contact pressure between the elastic coating part 51 and the pipe 102. The feeding component 7 on the U-shaped frame 103 feeds coupling agent to the elastic coating part 51 to achieve uniform coating of the weld of the pipe 102, ensuring stable coating effect and providing good conditions for ultrasonic testing.

[0040] like Figure 7 As shown, in this embodiment, the elastic applicator 51 includes an applicator block 511, a second insert rod 512, and a third spring 513. The second insert rod 512 is inserted into the second cavity and abuts against the second pressure sensor 52. The applicator block 511 is installed on one end of the second insert rod 512 near the tube 102. The third spring 513 is sleeved on the second insert rod 512, and both ends of the second insert rod 512 are respectively connected to the fixing block 53 and the applicator block 511. A cavity is opened in the applicator block 511, and the supply component 7 communicates with the cavity. A plurality of applicator holes 514 communicating with the cavity are opened on the side of the applicator block 511 near the tube 102.

[0041] The second insert 512 is inserted into the second cavity of the fixing block 53 and abuts against the second pressure sensor 52, transmitting the pressure of the coating block 511. The coating block 511 is installed at one end of the second insert 512. The third spring 513 is sleeved on the second insert 512 to maintain the pressure between the coating block 511 and the tube 102. The supply assembly 7 is used to deliver the coupling agent into the cavity of the coating block 511 and then squeeze it out from the coating hole 514, evenly coating it onto the tube 102. This structure makes the coupling agent coating more uniform and improves the accuracy of detection.

[0042] like Figure 6 As shown, in this embodiment, the supply component 7 includes a supply cylinder 71, which is installed at the bottom of the U-shaped frame 103. The supply cylinder 71 contains a coupling agent, and a pump 72 is installed at the bottom of the supply cylinder 71. The outlet end of the pump 72 is connected to a conduit 73, and one end of the conduit 73 communicates with the cavity inside the coating block 511. An inlet shaft 74 is connected to the supply cylinder 71.

[0043] The supply cylinder 71 stores the coupling agent. When the extraction pump 72 is started, the coupling agent in the supply cylinder 71 is extracted and transported to the cavity of the coating block 511 through the conduit 73. The liquid inlet shaft 74 is used to replenish the coupling agent in the supply cylinder 71 to ensure a continuous and stable supply of coupling agent and to ensure the smooth progress of the detection process.

[0044] like Figure 1 and Figure 9 As shown, in this embodiment, the rotating clamping member 2 includes a motor 21 and a clamping plate 22. An installation chamber is provided in the base 1. The motor 21 is installed in the installation chamber. The output end of the motor 21 is connected to the clamping plate 22. The pipe 102 is clamped on the clamping plate 22. The driving component 3 includes an assembly cylinder 31, a cylinder 32, a reciprocating screw 33, and a limiting rod 34. The assembly cylinder 31 is rotatably mounted on the base 1 and located on one side of the clamp 22. The cylinder 32 is mounted on the assembly cylinder 31, and the driving end of the cylinder 32 is connected to the reciprocating screw 33. Two limiting rods 34 are symmetrically mounted on the base 1. A U-shaped frame 103 is sleeved on the reciprocating screw 33 and the two limiting rods 34. The U-shaped frame 103 is threadedly engaged with the reciprocating screw 33, and the U-shaped frame 103 is slidably engaged with the two limiting rods 34. A drive gear 105 is fixedly mounted on the chuck 22, and a driven gear 106 that meshes with the drive gear 105 is fixedly mounted on the assembly cylinder 31.

[0045] The motor 21 in the mounting chamber of the base 1 is started, driving the clamp 22 to rotate, thereby clamping and rotating the pipe fitting 102. The assembly cylinder 31 is rotatably mounted on the base 1. The driving gear 105 on the clamp 22 meshes with the driven gear 106 on the assembly cylinder 31, causing the assembly cylinder 31 to rotate with the clamp 22. The cylinder 32 on the assembly cylinder 31 drives the reciprocating screw 33 to move. The U-shaped frame 103 is sleeved on the reciprocating screw 33 and the limiting rod 34. The reciprocating screw 33 drives the U-shaped frame 103 to move up and down. The limiting rod 34 plays a guiding and limiting role, ensuring the stable movement of the U-shaped frame 103, and realizing the inspection operation of the weld of the pipe fitting 102.

[0046] like Figure 1 As shown, in this embodiment, the controller 107 is connected to the motor 21, cylinder 32, electric push rod 401, first pressure sensor 43, second pressure sensor 52, laser rangefinder 62, extraction pump 72, and ultrasonic flaw detector 8.

[0047] The controller 107, as the control core, receives detection data from the first pressure sensor 43, the second pressure sensor 52, and the laser rangefinder 62. Based on this data, it controls the working status of the motor 21, cylinder 32, electric push rod 401, extraction pump 72, and ultrasonic flaw detector 8. It adjusts the contact force between the ultrasonic probe 101 and the pipe fitting 102 based on the data from the first pressure sensor 43 and the second pressure sensor 52, and compensates for the ultrasonic signal reception based on the data from the laser rangefinder 62. This achieves automated and precise control of the entire detection device, improving detection efficiency and accuracy.

[0048] The specific working principle of this invention is as follows: The pipe fitting 102 is placed on the clamping plate 22 of the rotating clamping member 2 and fixed. The clamping plate 22 is driven to rotate by the motor 21 to realize the rotation of the pipe fitting 102. At the same time, coupling agent is added into the feeding cylinder 71 and replenished through the liquid inlet shaft 74. When the cylinder 32 in the drive unit 3 is activated, it pushes the reciprocating screw 33, which in turn moves the U-shaped frame 103, causing the coating sensing module 5 to reach the weld position of the pipe fitting 102. The electric guide rail 54 adjusts the position of the elastic coating component 51 so that it contacts the pipe fitting 102. The pipe fitting 102 rotates under the drive of the rotating clamp 2, and the drive unit 3 rotates accordingly. The U-shaped frame 103 moves up and down reciprocally, and the elastic coating component 51 evenly coats the coupling agent around the weld of the pipe fitting 102. During this process, the second pressure sensor 52 collects data on the unevenness of the outer periphery of the pipe fitting 102. After the coating is applied, the drive unit 3 drives the U-shaped frame 103 to rise, so that the ultrasonic probe 101 reaches the position coated with coupling agent. The electric push rod 401 pushes the elastic contact member 41, so that the two ultrasonic probes 101 contact the two sides of the pipe 102 respectively. The rotating clamp 2 rotates the pipe 102 again. The drive unit 3 drives the U-shaped frame 103 to move up and down reciprocally. The ultrasonic probe 101 moves up and down reciprocally around the weld to perform a circular detection. The first pressure sensor 43 monitors the contact force in real time and adjusts it in time to ensure stable detection. If the surface of the pipe 102 is not flat, the ultrasonic probe 101 drives the elastic sensing module 4 to move. The slide rod 402 slides in the sliding port 104. The laser rangefinder 6 measures the moving distance of the slide rod 402 and performs compensation processing on the ultrasonic signal reception. The ultrasonic flaw detector 8 receives the detection signal of the ultrasonic probe 101 through the cable 81 to analyze whether there are defects in the weld. The controller 107 receives data from the first pressure sensor 43 and the second pressure sensor 52, and controls the operation of the motor 21, cylinder 32, electric push rod 401, extraction pump 72 and ultrasonic flaw detector 8 based on this data, so as to realize the automation and precise control of the entire detection process and ensure that the detection results are accurate and reliable.

[0049] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A non-destructive testing device for circumferential welds of pipes, characterized in that, It includes a base (1), an ultrasonic probe (101), a pipe (102), a U-shaped frame (103), a rotating clamp (2), and a drive unit (3); The rotating clamp (2) is installed on the base (1) and is used to clamp the pipe (102). The U-shaped frame (103) is set above the base (1) and is driven up and down by the drive (3). When the rotating clamp (2) rotates, the drive (3) rotates accordingly to drive the U-shaped frame (103) to move up and down repeatedly. Two elastic sensing modules (4) are symmetrically installed on the U-shaped frame (103). The pipe (102) is located between the two elastic sensing modules (4). An ultrasonic probe (101) is installed on each side of the two elastic sensing modules (4). The distance between the two elastic sensing modules (4) is adjustable. The elastic sensing module (4) includes a first pressure sensor (43) installed inside. An adjustable application sensing module (5) is mounted on the bottom of one of the elastic sensing modules (4), and the application sensing module (5) is used to apply coupling agent to the pipe (102). The application sensing module (5) includes a built-in second pressure sensor (52).

2. The non-destructive testing device for circumferential welds of pipes according to claim 1, characterized in that, The U-shaped frame (103) has two symmetrically arranged sliding openings (104), and each of the two elastic sensing modules (4) is equipped with a sliding rod (402). The two sliding rods (402) pass through the two sliding openings (104) respectively. A laser rangefinder (6) facing the sliding rod (402) is installed on the back of the U-shaped frame (103). The laser rangefinder (6) includes a mounting block (61) and a laser rangefinder (62). The mounting block (61) is mounted on the back of the U-shaped frame (103), and laser rangefinders (62) are mounted on both sides of the mounting block (61). The two laser rangefinders (62) face the two slide bars (402) respectively.

3. The non-destructive testing device for circumferential welds of pipes according to claim 2, characterized in that, The elastic sensing module (4) further includes an elastic contact (41) and an elastic insert (42). Electric push rods (401) are installed on both sides of the U-shaped frame (103). The two elastic contact (41) are connected to the two electric push rods (401) respectively, and the distance between them is changed by the two electric push rods (401). The first pressure sensor (43) is installed in the elastic contact (41). The elastic insert (42) is inserted into the elastic contact (41) and abuts against the first pressure sensor (43). The ultrasonic probe (101) is installed on the side of the elastic insert (42) near the pipe (102).

4. The non-destructive testing device for circumferential welds of pipes according to claim 3, characterized in that, The elastic abutment (41) includes an assembly block (411) and an abutment block (412). The two assembly blocks (411) are respectively connected to two electric push rods (401). Connecting rods (413) are slidably connected around the assembly block (411). The abutment block (412) is connected to the connecting rods (413) around the assembly block (411). A first spring (414) is sleeved on the connecting rod (413), and the two ends of the first spring (414) are respectively connected to the assembly block (411) and the abutment block (412). A first insertion cavity is opened in the abutment block (412). The first pressure sensor (43) is installed in the first insertion cavity. The elastic plug (42) is inserted into the first insertion cavity and abuts against the first pressure sensor (43). The two sliding rods (402) are respectively connected to the two abutment blocks (412).

5. The non-destructive testing device for circumferential welds of pipes according to claim 4, characterized in that, The elastic insert (42) includes a first insert rod (421), a loading plate (422), and a second spring (423). The first insert rod (421) is inserted into the first insertion cavity and abuts against the first pressure sensor (43). The loading plate (422) is installed at one end of the first insert rod (421) near the pipe fitting (102). The second spring (423) is sleeved on the first insert rod (421), and both ends of the second spring (423) are respectively connected to the abutment block (412) and the loading plate (422). The loading plate (422) is provided with an insertion hole. The ultrasonic probe (101) is equipped with a docking rod (1011) that is inserted into the insertion hole. The loading plate (422) is threaded with a bolt (424) that abuts against the docking rod (1011). The U-shaped frame (103) is equipped with two ultrasonic flaw detectors (8). Each of the two ultrasonic flaw detectors (8) is connected with a cable (81). The two cables (81) are respectively connected to the two ultrasonic probes (101).

6. The non-destructive testing device for circumferential welds of pipes according to claim 4, characterized in that, The application sensing module (5) further includes an elastic application element (51), a fixing block (53) and an electric guide rail (54). An electric guide rail (54) is installed at the bottom of one of the contact blocks (412). A fixing block (53) is installed at the drive end of the electric guide rail (54). A second insertion cavity is opened in the fixing block (53). The second pressure sensor (52) is installed in the second insertion cavity. The elastic application element (51) is inserted into the second insertion cavity and abuts against the second pressure sensor (52). The U-shaped frame (103) is equipped with a supply assembly (7) for supplying coupling agent to the elastic coating member (51).

7. The non-destructive testing device for circumferential welds of pipes according to claim 6, characterized in that, The elastic applicator (51) includes an applicator block (511), a second insert rod (512), and a third spring (513). The second insert rod (512) is inserted into the second cavity and abuts against the second pressure sensor (52). The applicator block (511) is installed at one end of the second insert rod (512) near the tube (102). The third spring (513) is sleeved on the second insert rod (512). The two ends of the second insert rod (512) are respectively connected to the fixing block (53) and the applicator block (511). A cavity is opened in the applicator block (511). The feeding component (7) communicates with the cavity. A plurality of applicator holes (514) communicating with the cavity are opened on the side of the applicator block (511) near the tube (102).

8. The non-destructive testing device for circumferential welds of pipes according to claim 6, characterized in that, The supply assembly (7) includes a supply cylinder (71), which is installed at the bottom of the U-shaped frame (103). The supply cylinder (71) contains a coupling agent. A pump (72) is installed at the bottom of the supply cylinder (71). The outlet end of the pump (72) is connected to a conduit (73), and one end of the conduit (73) is connected to the cavity inside the coating block (511). An inlet shaft (74) is connected to the supply cylinder (71).

9. The non-destructive testing device for circumferential welds of pipes according to claim 1, characterized in that, The rotating clamping member (2) includes a motor (21) and a clamping plate (22). The base (1) has an installation chamber. The motor (21) is installed in the installation chamber. The output end of the motor (21) is connected to the clamping plate (22). The pipe (102) is clamped on the clamping plate (22). The driving component (3) includes an assembly cylinder (31), a cylinder (32), a reciprocating screw (33), and a limiting rod (34). The assembly cylinder (31) is rotatably mounted on the base (1) and located on one side of the clamp (22). The cylinder (32) is mounted on the assembly cylinder (31). The driving end of the cylinder (32) is connected to the reciprocating screw (33). Two limiting rods (34) are symmetrically mounted on the base (1). The U-shaped frame (103) is sleeved on the reciprocating screw (33) and the two limiting rods (34). The U-shaped frame (103) is threadedly engaged with the reciprocating screw (33), and the U-shaped frame (103) is slidably engaged with the two limiting rods (34). The chuck (22) is fixedly fitted with a drive gear (105), and the assembly cylinder (31) is fixedly fitted with a driven gear (106) that meshes with the drive gear (105).

10. The non-destructive testing device for circumferential welds of pipes according to claim 1, characterized in that, The controller (107) is connected to the motor (21), cylinder (32), electric push rod (401), first pressure sensor (43), second pressure sensor (52), laser rangefinder (62), extraction pump (72), and ultrasonic flaw detector (8), respectively.

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