CN114166940B - Online nondestructive flaw detector for pressure pipeline detection - Google Patents
Online nondestructive flaw detector for pressure pipeline detection Download PDFInfo
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- CN114166940B CN114166940B CN202111386287.2A CN202111386287A CN114166940B CN 114166940 B CN114166940 B CN 114166940B CN 202111386287 A CN202111386287 A CN 202111386287A CN 114166940 B CN114166940 B CN 114166940B
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- 238000001514 detection method Methods 0.000 title claims abstract description 93
- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 238000007790 scraping Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 9
- 238000007689 inspection Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
The invention discloses an online nondestructive flaw detector for detecting a pressure pipeline, which belongs to the technical field of pipeline flaw detection and comprises a fixed ring, wherein a driving mechanism for driving the fixed ring to move along the pipeline is connected inside the fixed ring, and the driving mechanism can move along pipelines with different diameters; according to the invention, when flaw detection is carried out on the pipeline each time, the diameter of the pipeline is detected by utilizing the driving mechanism and the adjusting mechanism, the driving mechanism can meet the driving effect of pipelines with different diameters, the adjusting mechanism can adjust the distance between the flaw detector and the outer surface of the pipeline, accurate detection of cracks in the pipeline by the flaw detector is facilitated, the flaw detector is driven by the rotating mechanism to carry out circumferential rotation flaw detection, so that full-coverage flaw detection is carried out on the outer surface of the pipeline, the detection is more accurate, and the driving mechanism and the rotating mechanism are controlled by the controller in a staggered manner, so that sectional intermittent flaw detection is automatically realized.
Description
Technical Field
The invention relates to the technical field of pipeline flaw detection, in particular to an online nondestructive flaw detector for pressure pipeline detection.
Background
After the metal pipeline is formed, and welded seams after the pipeline is welded are subjected to nondestructive inspection, so that whether cracks, impurities and the like exist at the metal pipeline and the welded seams or not is inspected, and the method belongs to an important inspection procedure, wherein ultrasonic flaw detection (PT flaw detection for short) is widely applied.
In the prior art, when ultrasonic flaw detection is carried out on a pipeline, because the pipeline is cylindrical, and when the pipeline length which needs to be detected is long generally, the pipeline is subjected to point-by-point flaw detection by personnel by utilizing a flaw detector, so that time and labor are wasted, flaw detection positions are difficult to accurately grasp, the part with cracks is not accurately detected, the detection accuracy is insufficient, and the conventional detector cannot correspondingly change according to the pipeline diameter change, so that the pipeline detection accuracy is insufficient.
Based on the above, the invention designs an online nondestructive flaw detector for detecting a pressure pipeline so as to solve the problems.
Disclosure of Invention
The invention aims to provide an online nondestructive flaw detector for detecting a pressure pipeline, which aims to solve the problems that in the prior art, when ultrasonic flaw detection is carried out on the pipeline, because the pipeline is cylindrical and the pipeline length to be detected is long in general, point-by-point flaw detection is complicated by personnel through a flaw detector, time and labor are wasted, flaw detection positions are difficult to accurately grasp, part with cracks cannot be accurately detected, detection accuracy is insufficient, and the conventional detector cannot correspondingly change according to the diameter change of the pipeline, so that the pipeline detection accuracy is insufficient.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an online nondestructive inspection appearance for pressure pipeline detects, includes the solid fixed ring, gu fixed ring internal connection has the actuating mechanism who is used for driving gu fixed ring along the pipeline removal, actuating mechanism can be followed the pipeline of different diameter sizes and moved, it is connected with first swivel to rotate on the solid fixed ring inner wall, the inside sliding connection of first swivel has a plurality of flaw detectors that take the form of circumference array, two-to-two opposite arrangement of flaw detector just the flaw detector surrounds the pipeline and is used for detecting the pipeline, be equipped with the adjustment mechanism that is used for adjusting a plurality of flaw detectors outside the first swivel, be connected with the rotary mechanism who drives first swivel on the solid fixed ring surface, fixedly connected with controller on the solid fixed ring surface, the controller is used for controlling actuating mechanism and rotary mechanism and carries out the alternate action;
The rotating mechanism comprises a first motor, the first motor is fixedly connected to the outer surface of the fixed ring, a first gear is fixedly connected to the output shaft end of the first motor, a first gear ring is fixedly connected to the outer surface of the first rotating ring, and the first gear ring is meshed with the first gear;
The driving mechanism comprises four groups of driving pieces which are circumferentially distributed along the edge of the fixed ring, each driving piece comprises two first sliding plates, the two first sliding plates penetrate through the fixed ring and are in sliding connection with the fixed ring, idler wheels are connected to the inner sides of the two first sliding plates in a common rotating mode, driving motors are fixedly connected to the end portions of rotating shafts of the idler wheels, the driving motors are fixedly connected to the side walls of the first sliding plates, adjusting cylinders are fixedly connected to the outer surfaces of the fixed ring, adjusting plates are fixedly connected to the outer ends of the two first sliding plates together, and the outer ends of the adjusting cylinders are fixedly connected with the adjusting plates;
the adjusting mechanism comprises a plurality of first push rods, the first push rods are rotationally connected to the outer surface of the flaw detector, a first sliding groove is formed in the left end of the first swivel, the inner ends of the plurality of first push rods are rotationally connected with first sliding rods, the first sliding rods are slidably connected in the first sliding grooves, the outer ends of the plurality of first sliding rods are rotationally connected with adjusting rings in a common mode, the adjusting rings are located on the left side of the first swivel, and a positioning mechanism used for positioning the adjusting rings after adjustment is completed is connected to the side wall of the adjusting rings;
the positioning mechanism comprises a first fixed block, the first fixed block is fixedly connected to the outer surface of the adjusting ring, a fastening plate is fixedly connected to the outer surface of the first rotating ring, a second sliding groove is formed in the fastening plate in an opening and closing mode, a fastening screw is connected to the first fixed block in a threaded mode, and a first baffle disc is connected to the right end of the fastening screw in a rotating mode;
a second baffle disc is fixedly connected to the outer surface of each flaw detector, the second baffle disc is positioned on the inner side of the first swivel, and a first spring positioned between the second baffle disc and the first swivel is sleeved on the outer surface of each flaw detector;
each first push rod is fixedly connected with a scraping plate at the rotating shaft end of the flaw detector, the right side wall of each scraping plate is in contact with the adjusting ring, and a plurality of scraping plates are used for cleaning the outer surface of the pipeline.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, when flaw detection is carried out on the pipeline each time, the diameter of the pipeline is detected by utilizing the driving mechanism and the adjusting mechanism, the driving mechanism can meet the driving effect of pipelines with different diameters, the adjusting mechanism can adjust the distance between the flaw detector and the outer surface of the pipeline, accurate detection of cracks in the pipeline by the flaw detector is facilitated, the flaw detector is driven by the rotating mechanism to carry out circumferential rotation flaw detection, so that full-coverage flaw detection is carried out on the outer surface of the pipeline, the detection is more accurate, the driving mechanism and the rotating mechanism are controlled by the controller in a staggered manner, sectional intermittent flaw detection is automatically realized, the full-directional flaw detection on the long pipeline can be spontaneously and completely carried out, and the detection result is more reliable.
2. According to the invention, the adjusting ring is rotated to drive the first sliding rod to slide in the first sliding groove, the first sliding rod pushes the first push rod, and the first push rod synchronously drives the flaw detector, so that the flaw detector can slide outwards or inwards, the distance between the flaw detector and the outer surface of the pipeline is adjusted, the inner end of the flaw detector is prevented from contacting with the outer surface of the pipeline, and the inner end probe of the flaw detector is protected, so that the synchronous height adjustment of a plurality of flaw detectors is realized, and the flaw detection of the flaw detector is facilitated.
3. According to the invention, after adjustment is completed, the fastening screw is rotated and is in threaded connection with the first fixed block, so that the fastening screw moves outwards, the first baffle disc is tensioned and abutted against the fastening plate, the adjusting ring and the first rotating ring are fastened together, the adjusting ring is prevented from spontaneously rotating, the second sliding groove is used for driving the fastening screw to slide in the second sliding groove when the adjusting ring is adjusted, and the adjustment characteristic is met.
Drawings
FIG. 1 is a first perspective view of the overall structure of the present invention;
FIG. 2 is a second perspective view of the overall structure of the present invention;
FIG. 3 is a third perspective view (without tubing) of the overall structure of the present invention;
FIG. 4 is a fourth perspective view (without tubing) of the overall structure of the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 4 at A;
FIG. 6 is a schematic view of a first swivel, a first slide groove and a first slide bar according to the present invention;
fig. 7 is a schematic view of the structure of the first push rod and the adjusting ring of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
The device comprises a fixed ring 1, a first swivel 2, a flaw detector 3, a controller 4, a first motor 5, a first gear 6, a first gear ring 7, a first sliding plate 8, rollers 9, a driving motor 10, an adjusting cylinder 11, an adjusting plate 12, a first push rod 13, a first sliding groove 14, a first sliding rod 15, an adjusting ring 16, a first fixed block 17, a fastening plate 18, a second sliding groove 19, a fastening screw 20, a first baffle disc 21, a second baffle disc 22, a first spring 23 and a scraping plate 24.
Detailed Description
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides an online nondestructive inspection appearance for pipeline under pressure detects, including solid fixed ring 1, gu fixed ring 1 internally connected with is used for driving gu fixed ring 1 along the actuating mechanism of pipeline removal, actuating mechanism can be along the pipeline of different diameter sizes remove, gu fixed ring 1 inside wall is gone up to rotate and is connected with first swivel 2, gu inside sliding connection of first swivel 2 has a plurality of flaw detectors 3 that are circumference array, flaw detector 3 two by two are relative to be arranged, and flaw detector 3 encircles the pipeline and is used for detecting the pipeline, gu the outside of first swivel 2 is equipped with the adjustment mechanism that is used for adjusting a plurality of flaw detectors 3, be connected with the rotary mechanism that drives first swivel 2 and rotate on gu fixed ring 1 surface, gu fixed ring 1 surface is fixedly connected with controller 4, controller 4 is used for controlling actuating mechanism and rotary mechanism and carries out the alternate action;
The rotating mechanism comprises a first motor 5, the first motor 5 is fixedly connected to the outer surface of the fixed ring 1, a first gear 6 is fixedly connected to the output shaft end of the first motor 5, a first gear ring 7 is fixedly connected to the outer surface of the first rotating ring 2, and the first gear ring 7 is meshed with the first gear 6;
The driving mechanism comprises four groups of driving pieces which are circumferentially distributed along the edge of the fixed ring 1, each driving piece comprises two first sliding plates 8, each first sliding plate 8 penetrates through the fixed ring 1 and is in sliding connection with the corresponding first sliding plate, idler wheels 9 are connected to the inner sides of the two first sliding plates 8 in a common rotating mode, driving motors 10 are fixedly connected to the end portions of rotating shafts of the idler wheels 9, the driving motors 10 are fixedly connected to the side walls of the first sliding plates 8, adjusting cylinders 11 are fixedly connected to the outer surfaces of the fixed ring 1, adjusting plates 12 are fixedly connected to the outer ends of the two first sliding plates 8 together, and the outer ends of the adjusting cylinders 11 are fixedly connected with the adjusting plates 12;
When the pipeline is required to be subjected to flaw detection, the fixing ring 1 is firstly arranged into the surrounding pipeline from the end of the pipeline, then the adjusting cylinder 11 is started, the adjusting cylinder 11 drives the two first sliding plates 8 to move inwards through the adjusting plate 12, the rollers 9 and the driving motor 10 are synchronously driven to move inwards, the surrounding rollers 9 synchronously clamp the pipeline, so that the fixing ring 1 and the first rotating ring 2 are concentric with the pipeline, flaw detection operation is facilitated on the periphery of the pipeline, then the plurality of flaw detectors 3 are adjusted to a proper detection height from the outer surface of the pipeline by utilizing the adjusting mechanism, the inner ends of the flaw detectors 3 are higher than the outer surface of the pipeline, contact abrasion of the inner ends of the flaw detectors 3 and the outer surface of the pipeline is avoided, flaw detection operation of the flaw detectors 3 is facilitated, after the adjusting mechanism is adjusted, the flaw detectors 3 are positioned at proper positions outside the pipeline, then the flaw detectors 3 start to work, the controller 4 synchronously starts the first motor 5 to close the driving motor 10, at the moment, when the first motor 5 works on the flaw detector 3, the first motor 5 drives the first gear 6 to rotate, thereby driving the first gear ring 7 meshed with the first gear 6 to rotate, driving the first rotating ring 2 to rotate in the fixed ring 1, enabling the flaw detector 3 to perform flaw detection with a certain range along the outer surface of the pipeline, avoiding that the pipeline area between the two flaw detectors 3 cannot be completely detected, and being capable of completely performing flaw detection on the pipeline, being convenient and quick, after the flaw detector 3 performs complete flaw detection on the circumference of the pipeline, the controller 4 controls the first motor 5 to close, simultaneously, starts the driving motor 10, drives the roller 9 to rotate, the roller 9 rolls on the outer surface of the pipeline, the roller 9 is tightly pressed on the outer surface of the pipeline, and when the roller 9 rolls, the roller 9 drives the fixed ring 1 to spontaneously move along the pipeline through the first sliding plate 8, after the driving motor 10 starts for a set time, at this time, the fixed ring 1 drives the first conversion and the flaw detector 3 to move to the next detection position, the moving distance of the flaw detector 3 is accurately controlled, so that the front detection point and the rear detection point can be accurately controlled, the flaw detection range of the flaw detector 3 can be ensured to completely cover the pipeline, at this time, the controller 4 controls the driving motor 10 to be closed, the first motor 5 is started, the flaw detector 3 is driven to circularly rotate again, the outer surface of the pipeline is completely detected, the above actions are repeated, the automatic flaw detection is conveniently and rapidly performed on the long pipeline, personnel do not need to participate, mechanisms such as an alarm are matched, the crack position is automatically warned when the crack is detected, the personnel can timely feed back and repair, thereby realizing the detection of the diameter of the self-adapting pipeline by using the driving mechanism and the adjusting mechanism each time when the pipeline is detected, the driving mechanism can meet the driving effect of different diameters of the pipeline, the adjusting mechanism can adjust the distance of the flaw detector 3 from the outer surface of the pipeline, the flaw detector 3 is favorable for the detection of the inner part of the pipeline, the flaw detector 3 is driven to circularly rotate, the flaw detector 3 can automatically detect the pipeline by the full rotation, the full rotation of the pipeline can realize the full rotation detection, the full rotation detection mechanism can realize the full-automatic flaw detection, the full rotation detection can realize the full detection, and the full detection of the flaw detection can realize the full-automatic detection control of the flaw detection and the flaw detection by the detection and the full rotation detection and the full detection control.
As a further scheme of the invention, the adjusting mechanism comprises a plurality of first push rods 13, the first push rods 13 are rotatably connected to the outer surface of the flaw detector 3, a first sliding groove 14 is formed in the left end of the first swivel 2, the inner ends of the plurality of first push rods 13 are rotatably connected with a first sliding rod 15, the first sliding rods 15 are slidably connected in the first sliding groove 14, the outer ends of the plurality of first sliding rods 15 are rotatably connected with an adjusting ring 16 together, the adjusting ring 16 is positioned on the left side of the first swivel 2, and a positioning mechanism for positioning the adjusting ring 16 after adjustment is completed is connected to the side wall of the adjusting ring 16; when the flaw detector works, because synchronous distance adjustment is needed for a plurality of flaw detectors 3, the flaw detectors 3 meet the requirements of pipeline flaw detection of different diameters, when the flaw detector needs to be adjusted, the adjusting ring 16 is rotated, the adjusting ring 16 drives the first sliding rod 15 to slide in the first sliding groove 14, the first sliding rod 15 pushes the first push rod 13, the first push rod 13 synchronously drives the flaw detectors 3, the flaw detectors 3 slide outwards or inwards, the distance between the flaw detectors 3 and the outer surface of a pipeline is adjusted, the contact between the inner ends of the flaw detectors 3 and the outer surface of the pipeline is avoided, and the inner end probes of the flaw detectors 3 are protected, so that the flaw detection of the flaw detectors 3 can be adjusted in the same step height, and the flaw detection of the flaw detectors 3 is facilitated.
As a further scheme of the invention, the positioning mechanism comprises a first fixed block 17, the first fixed block 17 is fixedly connected to the outer surface of the adjusting ring 16, a fastening plate 18 is fixedly connected to the outer surface of the first swivel 2, a second sliding groove 19 is opened and closed in the fastening plate 18, a fastening screw rod 20 is connected to the inner part of the first fixed block 17 in a threaded manner, and a first baffle disc 21 is connected to the right end of the fastening screw rod 20 in a rotating manner; during operation, because after the adjusting ring 16 is adjusted, the adjusting ring 16 can spontaneously rotate to enable the adjusting effect to be poor, through rotating the fastening screw 20 after the adjusting is completed, the fastening screw 20 is in threaded connection with the first fixing block 17, so that the fastening screw 20 moves outwards, the first baffle disc 21 is tightly attached to the fastening plate 18, the adjusting ring 16 and the first rotating ring 2 are tightly fixed together, the adjusting ring 16 is prevented from spontaneously rotating, the second sliding groove 19 is used for driving the fastening screw 20 to slide in the second sliding groove 19 when the adjusting ring 16 is adjusted, and the adjusting characteristic is met.
As a further scheme of the invention, the outer surface of each flaw detector 3 is fixedly connected with a second baffle disc 22, the second baffle disc 22 is positioned on the inner side of the first rotating ring 2, and the outer surface of each flaw detector 3 is sleeved with a first spring 23 positioned between the second baffle disc 22 and the first rotating ring 2; during operation, as a welding seam possibly exists between pipelines, the outer surface of the welding seam is often larger than that of the pipeline, and the flaw detector 3 is quite close to the outer surface of the pipeline for accurate detection, the flaw detector 3 possibly contacts the welding seam when the flaw detector 3 detects the flaw and passes through the welding seam, the second baffle disc 22 fixed on the outer side surface of each flaw detector 3 contacts the welding seam before the second baffle disc 22 contacts the welding seam when the flaw detector 3 passes through the welding seam, so that the second baffle disc 22 is lifted up to squeeze the first spring 23, the first spring 23 synchronously drives the flaw detector 3 to move upwards, and moves outwards in advance to avoid the contact between the flaw detector 3 and the welding seam, thereby protecting the flaw detector 3 and detecting the flaw of the welding seam more comprehensively.
As a further scheme of the invention, each first push rod 13 and the rotating shaft end of the flaw detector 3 are fixedly connected with scraping plates 24, the right side wall of each scraping plate 24 is in contact with the adjusting ring 16 in the radial direction, and a plurality of scraping plates 24 are used for cleaning the outer surface of the pipeline; during operation, rust or scraps and the like possibly remain on the outer surface of the pipeline, so that the flaw detection of the flaw detector 3 is easily affected, the outer surface of the pipeline is scraped and cleaned when the first swivel 2 moves and rotates by utilizing the scraping plate 24, rust and scraps on the outer surface of the pipeline are taken out, the scraping plate 24 automatically expands or contracts with the first push rod 13, and the pipeline with different diameters is matched and cleaned, so that the automatic flaw detection of the flaw detector 3 is facilitated.
Working principle: when the pipeline is required to be subjected to flaw detection, the fixing ring 1 is firstly arranged into the surrounding pipeline from the end of the pipeline, then the adjusting cylinder 11 is started, the adjusting cylinder 11 drives the two first sliding plates 8 to move inwards through the adjusting plate 12, the rollers 9 and the driving motor 10 are synchronously driven to move inwards, the surrounding rollers 9 synchronously clamp the pipeline, so that the fixing ring 1 and the first rotating ring 2 are concentric with the pipeline, flaw detection operation is facilitated on the periphery of the pipeline, then the plurality of flaw detectors 3 are adjusted to a proper detection height from the outer surface of the pipeline by utilizing the adjusting mechanism, the inner ends of the flaw detectors 3 are higher than the outer surface of the pipeline, contact abrasion of the inner ends of the flaw detectors 3 and the outer surface of the pipeline is avoided, flaw detection operation of the flaw detectors 3 is facilitated, after the adjusting mechanism is adjusted, the flaw detectors 3 are positioned at proper positions outside the pipeline, then the flaw detectors 3 start to work, the controller 4 synchronously starts the first motor 5 to close the driving motor 10, at the moment, when the first motor 5 works on the flaw detector 3, the first motor 5 drives the first gear 6 to rotate, thereby driving the first gear ring 7 meshed with the first gear 6 to rotate, driving the first rotating ring 2 to rotate in the fixed ring 1, enabling the flaw detector 3 to perform flaw detection with a certain range along the outer surface of the pipeline, avoiding that the pipeline area between the two flaw detectors 3 cannot be completely detected, and being capable of completely performing flaw detection on the pipeline, being convenient and quick, after the flaw detector 3 performs complete flaw detection on the circumference of the pipeline, the controller 4 controls the first motor 5 to close, simultaneously, starts the driving motor 10, drives the roller 9 to rotate, the roller 9 rolls on the outer surface of the pipeline, the roller 9 is tightly pressed on the outer surface of the pipeline, and when the roller 9 rolls, the roller 9 drives the fixed ring 1 to spontaneously move along the pipeline through the first sliding plate 8, after the driving motor 10 starts for a set time, at this time, the fixed ring 1 drives the first conversion and the flaw detector 3 to move to the next detection position, the moving distance of the flaw detector 3 is accurately controlled, so that the front detection point and the rear detection point can be accurately controlled, the flaw detection range of the flaw detector 3 can be ensured to completely cover the pipeline, at this time, the controller 4 controls the driving motor 10 to be closed, the first motor 5 is started, the flaw detector 3 is driven to circularly rotate again, the outer surface of the pipeline is completely detected, the above actions are repeated, the automatic flaw detection is conveniently and rapidly performed on the long pipeline, personnel do not need to participate, mechanisms such as an alarm are matched, the crack position is automatically warned when the crack is detected, the personnel can timely feed back and repair, thereby realizing the detection of the diameter of the self-adapting pipeline by using the driving mechanism and the adjusting mechanism each time when the pipeline is detected, the driving mechanism can meet the driving effect of different diameters of the pipeline, the adjusting mechanism can adjust the distance of the flaw detector 3 from the outer surface of the pipeline, the flaw detector 3 is favorable for the detection of the inner part of the pipeline, the flaw detector 3 is driven to circularly rotate, the flaw detector 3 can automatically detect the pipeline by the full rotation, the full rotation of the pipeline can realize the full rotation detection, the full rotation detection mechanism can realize the full-automatic flaw detection, the full rotation detection can realize the full detection, and the full detection of the flaw detection can realize the full-automatic detection control of the flaw detection and the flaw detection by the detection and the full rotation detection and the full detection control.
Claims (1)
1. An on-line nondestructive flaw detector for pressure pipeline detection, includes solid fixed ring (1), its characterized in that: the fixed ring (1) is internally connected with a driving mechanism for driving the fixed ring (1) to move along pipelines, the driving mechanism can move along pipelines with different diameters, a first rotating ring (2) is rotationally connected to the inner side wall of the fixed ring (1), a plurality of flaw detectors (3) which are in a circumferential array are slidingly connected to the inner side of the first rotating ring (2), the flaw detectors (3) are arranged in pairs, the flaw detectors (3) surround the pipelines for detecting the pipelines, an adjusting mechanism for adjusting the flaw detectors (3) is arranged on the outer side of the first rotating ring (2), a rotating mechanism for driving the first rotating ring (2) to rotate is connected to the outer surface of the fixed ring (1), and a controller (4) is fixedly connected to the outer surface of the fixed ring (1) and used for controlling the driving mechanism and the rotating mechanism to alternately act;
The adjusting mechanism comprises a plurality of first push rods (13), the first push rods (13) are rotationally connected to the outer surface of the flaw detector (3), a first sliding groove (14) is formed in the left end of the first rotating ring (2), the inner ends of the first push rods (13) are rotationally connected with first sliding rods (15), the first sliding rods (15) are rotationally connected in the first sliding grooves (14), the outer ends of the first sliding rods (15) are rotationally connected with adjusting rings (16) together, the adjusting rings (16) are located on the left side of the first rotating ring (2), and a positioning mechanism used for positioning the adjusting rings (16) after adjustment is completed is connected to the side wall of the adjusting rings (16).
Each first push rod (13) is fixedly connected with a scraping plate (24) at the rotating shaft end of the flaw detector (3), the right side wall of each scraping plate (24) is in contact with the adjusting ring (16) in the direction, and a plurality of scraping plates (24) are used for cleaning the outer surface of a pipeline;
the rotating mechanism comprises a first motor (5), the first motor (5) is fixedly connected to the outer surface of the fixed ring (1), a first gear (6) is fixedly connected to the output shaft end of the first motor (5), a first gear ring (7) is fixedly connected to the outer surface of the first rotating ring (2), and the first gear ring (7) is meshed with the first gear (6);
The driving mechanism comprises four groups of driving pieces which are circumferentially distributed along the edge of the fixed ring (1), each driving piece comprises two first sliding plates (8), the two first sliding plates (8) penetrate through the fixed ring (1) and are in sliding connection with the fixed ring, idler wheels (9) are connected to the inner sides of the two first sliding plates (8) in a common rotation mode, driving motors (10) are fixedly connected to the end portions of rotating shafts of the idler wheels (9), the driving motors (10) are fixedly connected to the side walls of the first sliding plates (8), adjusting cylinders (11) are fixedly connected to the outer surfaces of the fixed ring (1), adjusting plates (12) are fixedly connected to the outer ends of the two first sliding plates (8), and the outer ends of the adjusting cylinders (11) are fixedly connected with the adjusting plates (12);
The positioning mechanism comprises a first fixed block (17), the first fixed block (17) is fixedly connected to the outer surface of the adjusting ring (16), a fastening plate (18) is fixedly connected to the outer surface of the first rotating ring (2), a second sliding groove (19) is formed in the fastening plate (18), a fastening screw (20) is connected to the first fixed block (17) in a threaded manner, and a first baffle disc (21) is connected to the right end of the fastening screw (20) in a rotating manner;
every all fixedly connected with second fender dish (22) on the surface of fault detector (3), second fender dish (22) are located the inboard of first rotating ring (2), every all overlap on the surface of fault detector (3) and be equipped with first spring (23) that are located between second fender dish (22) and first rotating ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111386287.2A CN114166940B (en) | 2021-11-22 | 2021-11-22 | Online nondestructive flaw detector for pressure pipeline detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111386287.2A CN114166940B (en) | 2021-11-22 | 2021-11-22 | Online nondestructive flaw detector for pressure pipeline detection |
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| Publication Number | Publication Date |
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| CN114166940A CN114166940A (en) | 2022-03-11 |
| CN114166940B true CN114166940B (en) | 2024-04-19 |
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|---|---|---|---|---|
| CN114700735B (en) * | 2022-04-26 | 2023-03-24 | 中国水利水电第四工程局有限公司 | Supplementary suit support of adjusting well of small-bore pipeline welding of complicated topography |
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