Phased array ultrasonic detection and magnetic suction scanning device for circumferential weld of small-diameter pipe

Abstract

The utility model provides a small-diameter pipe circumferential weld phased array ultrasonic detection magnetic suction scanning device, which belongs to the technical field of small-diameter pipe circumferential weld scanning and comprises a scanning frame, traveling wheels are symmetrically and rotatably arranged on the scanning frame, and magnetic suction rings are circumferentially sleeved on the outer walls of the traveling wheels. The outer side of the scanning frame is rotatably provided with a driving wheel linked with the walking wheel, the scanning frame is provided with an encoder in transmission connection with the driving wheel, the side wall of the scanning frame is fixedly provided with a guide seat, and the probe transmits an ultrasonic signal at a scanning welding seam to the phased array detector through a data line. The encoder records the path and walking data of the walking wheel in the rotating process, so that the integrity of data recording is guaranteed, the operation in the small-diameter pipe circumferential weld detection process is more convenient, the detection accuracy is improved by analyzing maps scanned by the data, the detection space is not limited, and the detection efficiency is improved. The device can be used for detecting small pipe diameters, and has wide applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to small diameter pipe girth weld scanning technical field, concretely to a kind of small diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device. BACKGROUND

[0002] Phased array ultrasonic detection is a new imaging detection technology in current pipeline weld nondestructive testing, and the phased array probe system needs to be circumferentially advanced along the weld direction during detection, and the result after detection is presented by atlas, and then the pipeline is repaired according to the detection result.

[0003] The related technology (publication number: CN113267563A) discloses an ultrasonic scanning device, which discloses the technical scheme: the annular chain structure can facilitate the installation of phased array probes of different sizes and specifications, so that the ultrasonic probe is better combined with the outer wall of the pipe to be detected during detection, and the motion trajectory is stable, greatly improving the detection efficiency and the reliability of the detection result. The length of the chain can be adjusted by increasing or decreasing the connecting blocks of the chain, which is flexible and suitable for pipes of different diameters, especially for small diameter pipe ultrasonic scanning. In addition, since the rollers connected with the encoder rotate synchronously with other rollers, the angular displacement data generated by the encoder can be used to reflect the circumferential position corresponding to the ultrasonic scanning data, which is beneficial to positioning and analyzing the ultrasonic scanning result. Reduces human error and improves defect positioning accuracy.

[0004] In the above disclosed technical scheme, the related technology has the following problems: the phased array ultrasonic detection technology has been widely used in various girth weld defect detection. Among them, the detection of small diameter pipe girth weld, which has higher difficulty and requirement, involves various pipe diameter girth weld, and the existing small diameter pipe girth weld scanning device is mainly composed of probe and splicing scanning chain;

[0005] According to the different construction spaces after welding on site, such as too large size of probe scanning device or too many accessories, the detection space is limited, such as narrow space, which is not convenient for installation of scanning device, so that individual weld cannot be scanned completely;

[0006] During detection, the coupling condition of probe and detected workpiece in small diameter pipe girth weld and the distance between the front end of probe and weld edge need to be considered in real time, if the direction of weld changes obviously during scanning, the position of probe needs to be adjusted manually, and it is difficult to ensure the accuracy of relative position between probe and weld, so that effective phased array ultrasonic detection atlas is obtained, which affects the detection quality;

[0007] Therefore, we propose a small diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device.

[0008] It should be noted that the information disclosed in the above BACKGROUND section is only for the purpose of strengthening the understanding of the BACKGROUND section of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. Utility model content

[0009] The utility model discloses to at least solve one of the technical problems existing in prior art or relevant art, in order to solve the problem of accurate scanning of girth weld in the above prior art, the utility model provides a kind of small diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device, adopt magnetic attraction wheel structure to combine girth weld probe structure to reach the effect of convenient and efficient accurate detection weld.It is specific technical scheme for:

[0010] A kind of small diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device, including scanning frame, the walking wheel is rotationally arranged symmetrically on the scanning frame, the outer wall of the walking wheel is circumferentially covered with magnetic attraction ring, the driving wheel that is linked with the walking wheel is rotationally arranged on the outer side of the scanning frame, the encoder that is drivingly connected with the driving wheel is arranged on the scanning frame, the side wall of the scanning frame is fixedly installed with guide seat, the probe support is embedded in the bottom of the guide seat, the probe is rotationally arranged in the bottom of the probe support, and the probe is electrically connected with phased array detector, and the probe support and the guide seat are connected by elastic element.

[0011] In the above technical scheme, the bottom of the guide seat is provided with a positioning link, one end of the elastic element is sleeved on the outside of the positioning link, and the other end of the elastic element is arranged on the top of the probe support.

[0012] The encoder is detachably arranged on the top of the scanning frame by the connecting frame.

[0013] The top of the scanning frame is provided with a locking member clamped on the connecting frame.

[0014] The outer wall of the driving wheel is circumferentially and uniformly provided with transmission teeth.

[0015] Compared with the prior art, the small diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device has the following advantages:

[0016] I. When detecting the girth weld of small-diameter pipes, the walking wheels are attracted to the outer wall of the pipe by magnetic attraction rings, then the scanning frame is pushed to move, the probe transmits the ultrasonic signals of the scanned weld to the phased array detector through the data line, the driving wheels rotate with the walking wheels, the driving wheels drive the attached encoder to rotate, the path and walking data of the walking wheels are recorded during the rotation of the encoder, thereby ensuring the integrity of the data record, making the operation of the small-diameter pipe girth weld detection process more convenient, analyzing the scanned atlas of each data improves the accuracy of detection, and the detection space is not limited, so that small-diameter pipe detection can be coped with, and the device has wide applicability.

[0017] II. When detecting the girth weld of the outer wall of the small-diameter pipe, the probe support slides on the inner wall of the guide seat by the elastic force of the elastic member, so that the probe support drives the probe to adhere to the weld, thereby ensuring the accuracy of the detection result.

[0018] III. The data transmitter on which the encoder is arranged is fixedly installed with a connecting frame on the top, the connecting frame is fixed on the top of the scanning frame through bolts, so that the encoder can be disassembled and installed, and the operation of the encoder during maintenance is more convenient.

[0019] IV. The device can be applied to the detection of various girth welds with a pipe diameter greater than or equal to 40 mm, does not use a traditional spliced scanning chain, uses magnetic driving wheels to ensure the accuracy of the scanning track, and drives personnel to scan the entire girth weld, and the entire scanning device is small in size and can be used in a narrow space, so that the scanning of the entire girth weld can be completed as long as the space in which the driving wheels can be placed.

[0020] V. The device does not need a special guide part, the two magnetic driving wheels are magnetically attracted to the pipe wall at a fixed distance and a fixed angle, the magnetic driving wheels have a certain width and a contact surface, and do not deviate in the horizontal direction (in a certain circumferential direction of the girth weld), the position sensor is tightly attached to the upper part of the driving wheel to complete transmission, data counting, the scanning device makes the atlas collection of the phased array ultrasonic detection of the workpiece more accurate, stable and convenient, and the nondestructive testing quality is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of a small-diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device Figure 1 ;

[0022] Figure 2 Structure diagram of a small-diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device Figure 2 ;

[0023] Figure 3 Structure explosion diagram of a small-diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device

[0024] wherein, Figures 1 to 3 The correspondence between the reference signs in the drawings and the component names is as follows: 1 - scanning frame, 2 - walking wheel, 3 - magnetic attraction ring, 4 - driving wheel, 5 - encoder, 6 - connecting frame, 7 - guide seat, 8 - probe support, 9 - data transmitter, 10 - data line, 11 - elastic member, 12 - probe, 13 - movable shaft, 14 - locking member. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Figures 1-3 The present application will be further described, but the present application is not limited to these embodiments.

[0027] A small-diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device, comprising a scanning frame 1, the scanning frame 1 is symmetrically provided with walking wheels 2 which are rotatably arranged, and a magnetic attraction ring 3 is circumferentially sleeved on the outer wall of the walking wheel 2. Grooves are formed on both sides of the scanning frame 1, bearings are embedded and installed on the inner walls on both sides of the grooves, the two ends of the center shaft are respectively embedded and installed in the interiors of the two bearings, the walking wheel 2 is fixedly sleeved on the exterior of the center shaft through the mounting hole formed in the center, so that the scanning frame 1 moves through the two walking wheels 2, and the magnetic attraction ring 3 is fixedly sleeved outside the embedding groove through the mounting hole in the center, so that the magnetic attraction ring 3 and the walking wheel 2 form a magnetic attraction wheel.

[0028] A driving wheel 4 which is linked with the walking wheel 2 is rotatably arranged on the outer side of the scanning frame 1, and an encoder 5 which is in transmission connection with the driving wheel 4 is arranged on the scanning frame 1. One end of the center shaft of one of the walking wheels 4 penetrates through the side wall of the scanning frame 1 and extends to the exterior of the scanning frame 1, and the driving wheel 4 is fixedly sleeved on the outer wall of the center shaft of the walking wheel 4 located outside the scanning frame 1 through the mounting hole formed in the center, so that the driving wheel 4 rotates synchronously with the walking wheel 4.

[0029] The data transmitter 9 is fixed on the bottom of the connecting frame 6, and the connecting frame 6 is fixed on the top of the scanning frame 1 through bolts and mounting holes. Thus, the circular encoder 5 is fixed on the position in contact with the outer wall of the driving wheel 4. The encoder 5 is rotationally arranged on the side wall of the data transmitter 9, that is, a bearing is embedded on the surface of the data transmitter 9, one end of a rotating shaft is embedded in the inner part of the bearing, the other end of the rotating shaft is vertically fixed on the surface of the circular encoder 5, and the rotating shaft on which the encoder 5 is located is connected with a sensor in the data transmitter 9, that is, the data transmitter 9 records the number of rotations of the encoder 5 and the path length through the sensor. One end of a data line 10 is arranged on the data transmitter 9, and the other end of the data line 10 is electrically connected with a map display, so that the corresponding position scanned by the encoder 5 is displayed on the map of the display.

[0030] Two magnetic wheels are clamped on one side of the ring weld of the pipe to be detected, and the two magnetic wheels are fixed at a fixed interval and a fixed angle on the pipe wall according to different pipe diameters. The magnetic wheel has a certain width and a contact surface with the pipe wall for adsorption, so that the horizontal deflection does not occur, and the driving part can walk along the circular circumferential trajectory of the outer wall of the ring weld. It is ensured that the deflection of the front end distance between the probe and the ring weld does not occur.

[0031] A guide seat 7 is fixedly arranged on the side wall of the scanning frame 1, a probe support 8 is embedded on the bottom of the guide seat 7, a probe 12 is rotationally arranged on the bottom of the probe support 8, the probe 12 is electrically connected with a phased array detector, and the probe support 8 is connected with the guide seat 7 through an elastic member 11. Two U-shaped frames are symmetrically clamped on the surface of the scanning frame 1, the through cavity formed by the U-shaped frames corresponds to the shape of the probe support 8, so that the probe support 8 slides in the through cavity formed by the two U-shaped frames.

[0032] An installation groove 28 is arranged on the bottom of the probe support 8, bearings are embedded on the inner walls of the two sides of the installation groove 28, one ends of two movable shafts 13 are respectively embedded in the two bearings, and the other ends of the two movable shafts 13 are symmetrically fixed on the two sides of the probe 12, so that the probe 12 rotates in the installation groove 28. The elastic member 11 is a compression spring, and the two ends of the elastic member 11 are respectively fixed on the guide seat 7 and the probe support 8.

[0033] When the ring weld of the small-diameter pipe is detected, the walking wheel 2 is adsorbed on the outer wall of the pipe through the magnetic adsorption ring 3 according to the front end distance set for the small-diameter pipe weld detection, so that the probe 12 is aligned with the weld, and the probe 12 is clamped on the weld through the elastic force of the elastic member 11 between the probe support 8 and the guide seat 7, and the walking wheel 2 is adsorbed on the outer wall of the pipe through the magnetic adsorption ring 3.

[0034] The probe 12 clamping portion is supported by a high-strength spring, and can be extended or contracted according to the pipe diameter, and the magnetic attraction of the magnetic attraction wheel ensures that the probe 12 is well coupled to the workpiece surface at different front end distances of different pipe diameters, is fixed in position in the radial direction, and is well coupled in the circumferential direction, and the scanning of different pipe diameters can be realized, and the probe is better applied to the small-diameter pipe surface

[0035] Then the scanning frame 1 is pushed to move, so that the scanning frame 1 drives the probe 12 to move in the circumferential direction and adhere to the pipe wall, and the probe 12 transmits the signal of the weld to the phased array detector, and the data transmitter 9 transmits the position information scanned by the probe 12 to the phased array detector through the data line 10, and the defect of the small-diameter pipe weld is determined through the formed atlas. In this process, the driving wheel 4 rotates with the walking wheel 2, so that the driving wheel 4 drives the adhered encoder 5 to rotate.

[0036] The encoder 5 records the path and walking data of the walking wheel 2 during rotation, thereby ensuring the integrity of the data record, and making the operation of the small-diameter pipe girth weld detection process more convenient. Through analysis of the atlas scanned by each data, the accuracy of detection is improved, and the detection space is not limited, which can cope with small-diameter pipe detection and has wide applicability.

[0037] The bottom of the guide seat 7 is provided with a positioning connecting rod 16, one end of the elastic element 11 is sleeved outside the positioning connecting rod 16, and the other end of the elastic element 11 is arranged at the top of the probe support 8. The two ends of the positioning connecting rod 16 are folded into annular shapes, so that the annular shapes of the two ends of the positioning connecting rod 16 are respectively adhered to the bottoms of the two U-shaped frames, and then two fixing bolts pass through the annular parts at the ends of the positioning connecting rod 16 and are fixed at the bottoms of the U-shaped frames, so that the positioning connecting rod 16 is fixed, and the positioning connecting rod 16 is convenient to disassemble and install.

[0038] The two ends of the elastic element 11 are fixedly installed with sleeves, the sleeve at one end of the elastic element 11 is sleeved outside the positioning connecting rod 16, and the positioning connecting rod 16 is fixed at the bottom of the guide seat 7 by two fixing bolts, the other end of the elastic element 11 is placed at the top of the probe support 8 through the sleeve, and then a fixing bolt passes through the sleeve at the end of the elastic element 11 and is fixed at the top of the probe support 8, so that the elastic element 11 can be disassembled and installed.

[0039] When detecting the small-diameter pipe girth weld, the probe support 8 slides on the inner wall of the guide seat 7 by the elastic force of the elastic element 11, so that the probe support 8 drives the probe 12 to adhere to the weld, and the accuracy of the detection result is ensured.

[0040] The encoder 5 is detachably arranged on the top of the scanning frame 1 through the connecting frame 6. The connecting frame 6 is fixedly arranged on the top of the data transmitter 9, and is fixed on the top of the scanning frame 1 through bolts, so that the encoder 5 can be detached and installed, and the operation of the encoder 5 during maintenance is more convenient.

[0041] The encoder 5 is in close contact with the upper part of the driving wheel 4 to complete transmission and data counting. Thus, the whole scanning and recording of the girth weld by the scanning device are completed, and the atlas collection of the phased array ultrasonic detection of the workpiece is more accurate, stable and convenient, and the nondestructive testing quality is more accurate.

[0042] The top of the scanning frame 1 is provided with a locking piece 14 clamped on the connecting frame 6. A threaded hole is formed in the top of the scanning frame 1, the connecting frame 6 is attached to the edge of the top of the scanning frame 1 close to the threaded hole, and then the locking piece 14 is screwed on the threaded hole, so that the locking piece 14 is clamped on the top of the connecting frame 6, thereby ensuring the stability of the data recording process of the encoder 5.

[0043] The outer wall of the driving wheel 4 is uniformly provided with transmission teeth. The meshing degree of the transmission teeth with the circular encoder 5 is increased, thereby improving the accuracy of data detection of the encoder 5.

[0044] The device determines the curvature wedge probe 12 to be used according to the pipe diameter of the workpiece to be detected, assembles the wedge with the probe 12 in the clamping part of the probe 12, and determines the position of the magnetic attraction wheel according to the front end distance of the probe 12 determined according to the actual detection needs.

[0045] The pipe wall probe is coated with a coupling agent or connected with a water coupling pipe along the running track.

[0046] The working principle of the small-diameter pipe girth weld phased array ultrasonic detection magnetic attraction scanning device is as follows: when the small-diameter pipe girth weld is detected, the front end distance of the probe is determined according to the specification of the small-diameter pipe, so that the running wheel 2 is attracted to the outer wall of the pipeline through the magnetic attraction ring 3, and the probe 12 is aligned with the weld. The probe 12 is attached to the pipe wall by the elastic force of the elastic member 11 between the probe support 8 and the guide seat 7, and the running wheel 2 is attracted to the outer wall of the pipeline through the magnetic attraction ring 3.

[0047] Then the scanning frame 1 is pushed to move, so that the scanning frame 1 drives the probe 12 to move circularly on the pipe wall, and the probe 12 transmits the signals of the scanned weld to the phased array detector. The data transmitter 9 transmits the position information of the probe 12 scanned by the data line 10 to the phased array detector, and the defects of the small-diameter pipe weld are determined through the formed atlas.

[0048] In the process, the drive wheel 4 rotates with the walking wheel 2, so that the drive wheel 4 drives the fitted encoder 5 to rotate, and the encoder 5 records the path and walking data of the walking wheel 2 in the rotating process, and analyzes the phased array map formed by each data scanned out, to judge the weld of the small diameter pipe.

[0049] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, so that the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly included at least one of the features.

[0051] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specified, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by those skilled in the art.

[0052] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A magnetic attraction scanning device for phased array ultrasonic inspection of small diameter pipe girth welds, characterized by: The utility model relates to a kind of magnetic scanning frame, including scanning frame (1), the walking wheel (2) is symmetrically rotated and arranged on the scanning frame (1), the outer wall of the walking wheel (2) is circumferentially covered with magnetic attraction ring (3), the outer side of the scanning frame (1) is rotatably arranged with the driving wheel (4) being linked with the walking wheel (2), the scanning frame (1) is provided with the encoder (5) being transmissionally connected with the driving wheel (4), the sidewall of the scanning frame (1) is fixedly installed with guide seat (7), the bottom of the guide seat (7) is embedded with probe support (8), the bottom of the probe support (8) is rotatably provided with probe (12), and the probe (12) is electrically connected with the encoder (5), and the probe support (8) is connected between the guide seat (7) by elastic member (11).

2. A magnetic attraction scanning device for phased array ultrasonic testing of small diameter pipe girth welds according to claim 1, characterized in that: The bottom of the guide seat (7) is provided with a positioning link (16), one end of the elastic member (11) is sleeved outside the positioning link (16), and the other end of the elastic member (11) is arranged on the top of the probe support (8).

3. A magnetic attraction scanning device for phased array ultrasonic testing of small diameter pipe girth welds according to claim 1, wherein: The encoder (5) is detachably arranged on the top of the scanning frame (1) by the connecting frame (6).

4. A magnetic attraction scanning device for phased array ultrasonic testing of small diameter pipe girth welds according to claim 3, characterized in that: The top of the scanning frame (1) is provided with a locking member (14) clamped on the connecting frame (6).

5. A magnetic attraction scanning device for phased array ultrasonic inspection of small diameter girth welds according to claim 1, wherein: The outer wall of the driving wheel (4) is uniformly provided with transmission teeth.

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