CN116642959B - Pipeline electromagnetic ultrasonic detection device - Google Patents
Pipeline electromagnetic ultrasonic detection device Download PDFInfo
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- CN116642959B CN116642959B CN202310923826.4A CN202310923826A CN116642959B CN 116642959 B CN116642959 B CN 116642959B CN 202310923826 A CN202310923826 A CN 202310923826A CN 116642959 B CN116642959 B CN 116642959B
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- 238000001514 detection method Methods 0.000 title claims abstract description 69
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
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- 229920001155 polypropylene Polymers 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/30—Constructional aspects of the propulsion means, e.g. towed by cables
- F16L55/38—Constructional aspects of the propulsion means, e.g. towed by cables driven by fluid pressure
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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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to the technical field of pipeline detection, in particular to an electromagnetic ultrasonic detection device for a pipeline, which comprises a sensing element, a middle shaft pipe with two through ends and a first paddle wheel rotatably arranged in the middle shaft pipe; the detection device also comprises: the two expansion elements are arranged on the middle shaft tube and comprise an air bag and an air supply assembly; the air bags are used for sealing with the inner wall of the pipeline after being inflated to form an isolated cavity between the two air bags; the valve, the internal support mechanism and the first rotary transducer are arranged outside the middle shaft tube; the first rotary energy converter is in transmission connection with the first paddle wheel, and the sensing element is arranged at the output end of the first rotary energy converter; through the device, the detection process is finished by directly injecting fluid into the pipeline, so that the detection task can be normally finished.
Description
Technical Field
The invention relates to the technical field of pipeline detection, in particular to an electromagnetic ultrasonic pipeline detection device.
Background
When detecting pipeline thickness, pipeline interior and pipeline wall microcracks, deformations, defects and leaks or other damages, electromagnetic ultrasound is generally used for detection.
As in the patent of application number CN202310223967.5, an electromagnetic ultrasonic detection device for industrial pipeline is disclosed, that is, electromagnetic ultrasonic is adopted to detect the interior of the pipeline, and the device can climb over the pipeline with larger bending angle, so that the trafficability of the device is greatly improved, in the device, a biaxial motor, a stepping motor and the like are adopted as the elements for driving the device to advance, so that the power supply equipment is required, because the pipeline is longer, an external electric wire is generally adopted for supplying power, the mode needs an electric wire with sufficient length, the use of the device is limited by the length of the electric wire, and if the length of the electric wire is insufficient, the pipeline detection task is difficult to complete.
In another example, in the patent with the application number of cn202010079299.X, a pipeline detection device is disclosed, and an electromagnetic ultrasonic mode is also adopted for detection, where the device adopts an inflatable and contractive inflation unit, and when detecting, only fluid needs to be filled in the inflation element, and the sensing element is extruded on the inner wall of the pipeline to be detected, and the control component receives the detection data of the sensing element, so as to complete the whole detection process.
In summary, since the existing devices for detecting the pipeline by electromagnetic ultrasonic wave all need a circuit for conveying energy to convey energy for the motion of the device, if the length of the circuit is insufficient, the detection task is likely to be difficult to complete.
Disclosure of Invention
In view of the above, the present invention is directed to an electromagnetic ultrasonic detection device for a pipeline, so as to solve the technical problem that in the prior art, if the length of a line for transmitting energy for the motion of the device is insufficient, the task of detecting the interior of the pipeline is likely to be difficult to complete.
Based on the above purpose, the invention provides an electromagnetic ultrasonic detection device for a pipeline, which comprises a sensing element for carrying out ultrasonic detection on the inner wall of the pipeline, a middle shaft pipe with two through ends and a first paddle wheel rotatably arranged in the middle shaft pipe; the detection device also comprises:
the two expansion elements are arranged on the middle shaft tube and comprise an air bag and an air supply assembly used for inflating and deflating the air bag; the air bags are used for sealing with the inner wall of the pipeline after being inflated to form an isolated cavity between the two air bags; the sensing element is positioned in the isolation cavity;
the valve is used for opening and closing the middle shaft tube and is arranged at the end part of the middle shaft tube;
at least one internal support mechanism for controlling movement or quiescence of the central siphon tube after the fluid is filled into the pipe;
the first rotary energy converter is arranged outside the middle shaft tube and is in transmission connection with the first paddle wheel, the sensing element is arranged at the output end of the first rotary energy converter, and the first rotary energy converter is used for driving the sensing element to rotate along the axis of the middle shaft tube when fluid enters the middle shaft tube to drive the first paddle wheel to rotate.
Preferably, the internal bracing mechanism includes:
the guide wheels are rotationally arranged at the other end of the support piece, and the central axis of the guide wheels is perpendicular to the central axis of the central shaft pipe;
the connecting ring is sleeved on the outer side of the middle shaft tube and is in sliding connection with the middle shaft tube;
the surface of the connecting ring is hinged with a first connecting rod, and the end part of the first connecting rod is hinged with the supporting piece;
a locking assembly for locking the guide wheel.
Preferably, the locking assembly comprises a first bevel gear, and the first bevel gear is fixedly arranged on a wheel shaft of the guide wheel;
the first bevel gear is meshed with the second bevel gear;
the support piece is also provided with a chuck for controlling the rotation of the second bevel gear.
Preferably, the air supply assembly comprises an air cavity arranged in the pipe wall of the middle shaft pipe, the air cavity is in a ring shape, an air hole is arranged at the joint of the air bag and the middle shaft pipe, and the air hole is communicated with the air cavity;
the piston ring is sleeved in the air cavity, and sealing rings are arranged on the inner side surface and the outer side surface of the piston ring and used for isolating the inside of the air cavity from the external environment; the piston ring is fixedly connected with the connecting ring.
Preferably, the expansion element further comprises a plurality of net-shaped supporting structures arranged in the air bag, and the outer edge surface of the air bag is made of elastic wear-resistant materials.
Preferably, the first rotary transducer includes:
the first outer gear ring is rotationally arranged in the middle shaft tube and connected with the first paddle wheel, and the central axis of the first outer gear ring is collinear with the central axis of the first paddle wheel;
the first closed ring is arranged on the outer side surface of the middle shaft tube and consists of first circular ring plates which are parallel to each other;
the second gear is rotationally arranged outside the middle shaft tube, a first notch communicated with the inside of the middle shaft tube is arranged on the outer side surface of the middle shaft tube, the first notch is positioned in the first closed ring, and the second gear is meshed with the first outer gear ring through the first notch;
the first annular gear is rotatably arranged in the first closed ring, the first annular gear is meshed with the second gear, and the side face of the first annular gear is in sealing connection with the first annular plate through a sealing ring;
the sensing element is arranged at the outer edge of the first annular gear.
Preferably, a driving part for driving the sensing element to be close to the inner wall of the pipeline is arranged outside the middle shaft pipe;
the driving part includes:
the limiting cylinder is fixedly arranged on the outer edge surface of the first annular gear, a sliding rod is arranged on the limiting cylinder in a sliding mode, and the sensing element is fixedly arranged at the outer end of the sliding rod;
the movable ring is rotatably arranged on the outer side surface of the middle shaft tube, one end of the movable ring is hinged with the surface of the movable ring, and the other end of the second connecting rod is hinged with the sliding rod;
the second linear driver is fixed outside the middle shaft tube, an output shaft of the second linear driver is provided with a rotating block, and the rotating block is rotationally connected with a circular groove arranged on the surface of the movable ring.
Preferably, the first paddle wheel comprises:
the device comprises a ring body and a plurality of blades distributed on the periphery of the ring body in an annular array, wherein the bottom ends of the blades are provided with wheel shafts; the ring body is connected with the first outer gear ring; the wheel axle penetrates through the axle hole formed in the ring body, and extends to the inside of the ring body;
a first gear mounted on the axle;
the first gears are in one-to-one correspondence with the racks, and are meshed with the corresponding racks;
the first elastic element is arranged in the pinch plate, one end of the first elastic element is fixed on the inner wall of the pinch plate, and the other end of the first elastic element is fixed on the side wall, facing the pinch plate, of the ring body;
the detection device further includes:
the first elastic element is fixed on the connecting ring, and the second elastic element is fixed on the connecting ring;
one end of the pull rope is fixed on the pull plate and a sheave arranged in the middle shaft tube, the pull rope penetrates through the middle shaft tube and bypasses the sheave, the other end of the pull rope is provided with an end block, and the end block is rotationally connected with a rotating hole arranged on the outer side face of the buckle plate.
Preferably, the detection device further includes:
the second slurry wheel is arranged at one end of the middle shaft tube far away from the valve, and the second rotary energy converter is arranged outside the middle shaft tube and is in transmission connection with the second slurry wheel;
the cleaning assembly is arranged on the middle shaft tube and comprises an outer cover body, a sliding ring and an injection tube, wherein the inner part of the outer cover body is provided with an inner ring cavity and an outer ring cavity, the inner ring cavity is respectively communicated with the outer ring cavity and the inside of the middle shaft tube, the sliding ring is rotationally connected with the outer cover body and seals the outer ring cavity, the injection tube is arranged at the output end of the second rotary transducer and is fixedly connected with the sliding ring, and a water inlet of the injection tube penetrates through the sliding ring and is communicated with the outer ring cavity.
Preferably, the second rotary transducer includes:
the second outer gear ring is rotationally arranged in the middle shaft tube and fixedly connected with the second slurry wheel, and the central axis of the second outer gear ring is collinear with the central axis of the second slurry wheel;
the second closed ring is arranged on the outer side surface of the middle shaft tube and consists of second circular ring plates which are parallel to each other;
the third gear is rotatably arranged outside the middle shaft tube, a second notch communicated with the inside of the middle shaft tube is arranged on the outer side surface of the middle shaft tube, the second notch is positioned in the second closed ring, and the third gear is meshed with the second outer gear ring through the second notch
The second annular gear is rotatably arranged in the second closed ring, the second annular gear is meshed with the third gear, and the side face of the second annular gear is in sealing connection with the second annular plate through a sealing ring;
the injection pipe is fixedly connected with the outer side surface of the second annular gear.
The invention has the beneficial effects that:
when the invention detects the inside of a pipeline, firstly, a worker opens the starting end of the pipeline and places the device in the pipeline, at the moment, the valve is kept in a closed state, then the air supply assembly inflates the air bags, so that the air bags are sealed with the inner wall of the pipeline after inflation to form an isolated cavity between the two air bags, and then the detection steps are carried out, and specifically as follows: step one: the position of the middle shaft tube is temporarily fixed through the internal supporting mechanism, then the valve is opened, fluid with certain pressure is introduced into the pipeline through one end of the pipeline, so that the fluid flows into the middle shaft tube, the first slurry wheel is driven to rotate, the sensing element rotates along the axis of the middle shaft tube under the action of the first rotary transducer, and the sensing element detects the inner wall of the pipeline in real time in the rotating process; step two: after the detection is finished at a certain position of the pipeline, the valve is closed, the internal support mechanism releases the middle shaft pipe, and the device is pushed to the next detection position in the pipeline under the pushing of fluid in the pipeline; step three: and repeating the first step to the second step until the detection task is completed, continuously keeping the valve closed, and then enabling the device to be separated from the pipeline through the pushing of the fluid to complete the detection. According to the device, the pipeline is directly used for replacing a pipeline for conveying energy in the prior art, so that the length of the pipeline is not required to be considered during detection, and the detection process is directly finished by injecting fluid into the pipeline, so that the detection task can be normally finished.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 2;
FIG. 4 is an enlarged view at B of FIG. 3;
FIG. 5 is a schematic perspective exploded view of a first paddle wheel of the present invention;
FIG. 6 is a schematic view of the internal structure of the first paddle wheel of the present invention;
FIG. 7 is an enlarged view at C of FIG. 3;
FIG. 8 is a schematic view of the internal structure of the first paddle wheel, first rotary transducer and bottom bracket tube of the present invention;
FIG. 9 is a top view of the present invention;
fig. 10 is an enlarged view of D of fig. 9;
FIG. 11 is a front view of the present invention;
fig. 12 is an enlarged view at E of fig. 4.
The reference numerals in the figures are:
1. a bottom bracket tube; 11. a valve; 12. an air cavity; 2. a first paddle wheel; 21. a first rotary transducer; 211. a first outer ring gear; 212. a second gear; 213. a first ring gear; 22. a ring body; 221. a blade; 222. a first gear; 223. a buckle plate; 224. a first elastic element; 225. a rack; 23. pulling a plate; 24. a second elastic element; 25. a pull rope; 3. a sensing element; 4. an inner support mechanism; 41. a support; 411. a guide wheel; 412. a locking assembly; 413. a first bevel gear; 414. a second bevel gear; 415. a chuck; 42. a first linear driver; 43. a connecting ring; 431. a first link; 44. piston rings; 5. an air bag; 51. a mesh support structure; 6. a driving part; 61. a limiting cylinder; 611. a slide bar; 62. a second linear driver; 63. a movable ring; 631. a second link; 7. a second paddle wheel; 71. a second rotary transducer; 711. a second outer ring gear; 712. a third gear; 713. a second ring gear; 8. a cleaning assembly; 81. a housing body; 811. an inner annular cavity; 812. an outer annular cavity; 82. a slip ring; 83. a jet pipe; 9. a pipeline.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Since the liquid or the high-pressure gas has a certain influence on the detection precision of the electromagnetic ultrasonic sensor, in order to solve the technical problem of low detection precision of the electromagnetic ultrasonic sensor in the pipeline 9 and simultaneously reduce the use quantity of the electromagnetic ultrasonic sensor, as shown in fig. 1, 2, 3, 8 and 9, the following preferred technical scheme is provided:
an electromagnetic ultrasonic detection device for a pipeline comprises a sensing element 3 for carrying out ultrasonic detection on the inner wall of a pipeline 9, a middle shaft pipe 1 with two through ends and a first paddle wheel 2 rotatably arranged in the middle shaft pipe 1, wherein the sensing element 3 is an electromagnetic ultrasonic sensor; the detection device also comprises:
the two expansion elements are arranged on the middle shaft tube 1 and comprise an air bag 5 and an air supply assembly for inflating and deflating the air bag 5; the air bags 5 are used for sealing with the inner wall of the pipeline 9 after being inflated to form an isolated cavity between the two air bags 5; the sensing element 3 is positioned in the isolated cavity;
the valve 11 is used for opening and closing the middle shaft tube 1, the valve 11 is an electromagnetic valve but is not limited to the electromagnetic valve, and the valve 11 is arranged at the end part of the middle shaft tube 1;
at least one internal support mechanism 4, it is used for after fluid fills in pipeline 9, control central siphon 1 removes or is static, and internal support mechanism 4 specifically distributes in the both sides of first thick liquid wheel 2 along the radial face of central siphon 1 in this detection device, can promote the control of central siphon 1 position stability through the setting of two sets of internal support mechanisms 4, internal support mechanism 4 includes: the device comprises a guide wheel 411 and a plurality of supporting pieces 41 distributed on the periphery of a central shaft tube 1 in an annular array, wherein the supporting pieces 41 are particularly three but not limited to the three supporting pieces 41 in the device, the three supporting pieces 41 are arranged around the axis of the central shaft tube 1, one end of each supporting piece 41 is hinged with the side surface of the central shaft tube 1, the guide wheel 411 is rotationally arranged at the other end of each supporting piece 41, and the central axis of the guide wheel 411 is perpendicular to the central axis of the central shaft tube 1; the first linear driver 42 is arranged on the outer side surface of the middle shaft tube 1, and the connecting ring 43 is connected with the output shaft of the first linear driver 42, the first linear driver 42 is an electric push rod but is not limited to the electric push rod, the connecting ring 43 is sleeved on the outer side of the middle shaft tube 1, and the connecting ring 43 is in sliding connection with the middle shaft tube 1; the surface of the connecting ring 43 is hinged with a first connecting rod 431, and the end part of the first connecting rod 431 is hinged with the supporting piece 41; a locking assembly 412 to lock the guide wheel 411; the locking assembly 412 comprises a first bevel gear 413, and the first bevel gear 413 is fixedly arranged on a wheel shaft of the guide wheel 411; a second bevel gear 414 rotatably provided on the support 41, the first bevel gear 413 being engaged with the second bevel gear 414; the support 41 is further provided with a chuck 415 for controlling the rotation of the second bevel gear 414; when the guide wheel 411 rotates, the first bevel gear 413 is driven to rotate, the first bevel gear 413 drives the second bevel gear 414 to rotate, and when the guide wheel 411 is required to be controlled to stop rotating, the chuck 415 clamps and fixes the wheel shaft of the second bevel gear 414, so that the guide wheel 411 is prevented from continuously rotating;
the first rotary energy converter 21 is arranged outside the bottom bracket tube 1, the first rotary energy converter 21 is in transmission connection with the first paddle wheel 2, the sensing element 3 is arranged at the output end of the first rotary energy converter 21, and the first rotary energy converter 21 is used for driving the sensing element 3 to rotate along the axis of the bottom bracket tube 1 when fluid enters the bottom bracket tube 1 to drive the first paddle wheel 2 to rotate.
Here, when detecting the inside of the pipeline 9, firstly, the worker opens the starting end of the pipeline 9 and places the device in the pipeline 9, at this time, the valve 11 is kept in a closed state, then the air supply assembly inflates the air bags 5, so that the air bags 5 are sealed with the inner wall of the pipeline 9 after inflation, an isolated cavity between the two air bags 5 is formed, and then a detection step is performed, specifically as follows: step one: the position of the middle shaft tube 1 is temporarily fixed through the inner supporting mechanism 4, then a valve 11 is opened, fluid with certain pressure is introduced into the pipeline 9 through one end of the pipeline 9, so that the fluid flows into the middle shaft tube 1, the first paddle wheel 2 is driven to rotate, the sensing element 3 rotates along the axis of the middle shaft tube 1 under the action of the first rotary transducer 21, and the sensing element 3 detects the inner wall of the pipeline 9 in real time in the rotating process; step two: after the detection of a certain position of the pipeline 9 is finished, the valve 11 is closed, the internal support mechanism 4 is enabled to loosen the middle shaft pipe 1, and the device is pushed to the next detection position in the pipeline 9 under the pushing of fluid in the pipeline 9; step three: and repeating the first step to the second step until the detection task is completed, continuously keeping the valve 11 closed, and then enabling the device to be separated from the pipeline 9 by pushing the fluid to complete detection. It can be seen from the above description that the device directly replaces the line for conveying energy in the prior art by the pipeline 9, so that the detection process can be completed by directly injecting fluid into the pipeline 9 without considering the length of the pipeline 9 during detection, thereby enabling the detection task to be completed normally.
Specifically, the operator opens the starting end of the pipeline 9, then places the detection device in the interior of the pipeline 9, the detection device is in a contracted state, then the internal supporting mechanism 4 starts to work, the first linear drivers 42 of the two umbrella-shaped external supporting assemblies start to work under the command of the controller, the electric energy is transmitted to the first linear drivers 42 through the storage battery built in the detection device, the first linear drivers 42 push the connecting ring 43 to start to move, the connecting ring 43 pushes the plurality of furled supporting pieces 41 to expand simultaneously through the first connecting rod 431, the wheel shafts of the guide wheels 411 are provided with pressure sensors, when the pressure sensors detect that the guide wheels 411 are pressed, the guide wheels 411 are in contact with the inner wall of the pipeline 9, the pressure sensors send signals to the controller, the controller stops the operation of the first linear drivers 42, and the guide wheels 411 are in contact with the inner wall of the pipeline 9; so that the shaft tube 1 is firmly controlled to be in a coaxial line with the pipe 9;
the air supply assembly starts to inflate the air bag 5 while the internal support mechanism 4 works, and the air bag 5 seals the gap between the central shaft tube 1 and the pipeline 9, so that gas or liquid cannot pass through the gap between the central shaft tube 1 and the pipeline 9; it should be noted that before the detection device is placed in the pipeline 9, a worker needs to clean the inner wall of the pipeline 9 in the placement area of the detection device to avoid that the dirt generated by the pipe wall affects the sensing element 3 so that the data precision cannot be ensured, and then the worker needs to inject fluid, which can be gas or liquid, into the starting end of the pipeline 9, and the fluid is specifically liquid in the detection device; the liquid at the beginning end of the pipeline 9 directly enters the middle shaft pipe 1 through the opened valve 11, at this time, the guide wheel 411 in the inner supporting structure is controlled to be in a fixed state by the locking component 412, the liquid passes through the first paddle wheel 2 in the process of passing through the middle shaft pipe 1, the liquid drives the liquid to rotate after passing through the first paddle wheel 2, the rotating first paddle wheel 2 drives the sensing element 3 to rotate around the middle shaft pipe 1 through the first rotary transducer 21, the sensing element 3 carries out nondestructive detection by utilizing the ultrasonic detection principle, and the ultrasonic detection principle is a conventional technology and is not repeated herein;
in addition, the air bags 5 positioned at the two ends of the sensing element 3 are used for sealing and connecting the middle shaft tube 1 with the inner wall of the pipeline 9, so that the position of the sensing element 3 is isolated from fluid injected into the pipeline 9 at the moment, (because liquid or high-pressure gas can have a certain influence on the detection precision of the electromagnetic ultrasonic sensor, the liquid has a larger density and can influence the propagation speed and attenuation coefficient of ultrasonic waves, thereby influencing the detection precision;
after the first rotary transducer 21 drives the sensing element 3 to detect the circumferential direction of the inner wall of the pipeline 9 for one circle, the locking component 412 of the internal support structure is released from the fixed state and enters the slidable state, meanwhile, the valve 11 of the middle shaft pipe 1 is closed, fluid entering the pipeline 9 is blocked by the air bag 5 and the valve 11 at the moment, so that the whole detection device is pushed to move along the pipeline 9, the distance is carried out on the moving distance of the middle shaft pipe 1 through the odometer or the encoder, when the moving distance is determined so that the sensing element 3 enters the position of the pipeline 9 to be detected at the next section, the valve 11 is opened, the internal support structure is restored to the fixed state, and the electromagnetic ultrasonic detection process of the pipeline 9 is repeatedly completed.
Further, as shown in fig. 3:
the air supply assembly comprises an air cavity 12 arranged in the pipe wall of the middle shaft pipe 1, the air cavity 12 is in a circular ring shape, an air hole is formed in the joint of the air bag 5 and the middle shaft pipe 1, and the air hole is communicated with the air cavity 12; the piston ring 44 is sleeved in the air cavity 12, and sealing rings are arranged on the inner side surface and the outer side surface of the piston ring 44 and used for isolating the inside of the air cavity 12 from the external environment; the piston ring 44 is fixedly connected with the connecting ring 43;
the balloon 5 has an annular pie-shaped appearance and is made of a flexible material, such as rubber or polyurethane, etc., so as to be able to expand and adapt to the shape of the interior of the tube 9 when inflated;
the air bag 5 is sleeved on the middle shaft tube 1, an air charging port is formed in the contact surface of the air bag 5 and the middle shaft tube 1, and the air charging port is communicated with the air outlet of the air cavity 12;
the outer edge surface of the air bag 5 is made of special sealing materials such as rubber, polyurethane, polyvinyl chloride, polypropylene and the like, wherein the rubber material is preferable, and the rubber has good elasticity and ductility, can adapt to the surfaces of pipelines 9 with different shapes, and has good wear resistance and sealing property;
in order to ensure that the airbag 5 can keep stable when expanding, the inside of the airbag 5 adopts a reticular supporting structure 51, the reticular supporting structure 51 is formed by sequentially connecting a plurality of crossed supporting rods, the shape of a single supporting rod is letter-shaped, the single supporting rod can provide the stability and the shape of the airbag 5 when inflating, and can prevent the airbag 5 from being excessively expanded or broken when colliding, and finally, the situation that the airbag 5 is folded like an umbrella when being pressed is avoided.
Specifically, during the process of controlling the movement of the connection ring 43 by the first linear actuator 42, the connection ring 43 will press the gas inside the gas chamber 12 of the bottom bracket tube 1 through the piston ring 44, the gas inside the gas chamber 12 will be injected into the interior of the air bag 5, and the amount of the gas pressed into the interior of the air bag 5 is proportional to the formation of the connection ring 43 pushed by the first linear actuator 42.
Further on
Since the data of the suspected defects of the pipeline 9 may appear in the ultrasonic inspection of the inner wall of the pipeline 9, in order to improve the accuracy of the detected data, the sensing element 3 needs to be subjected to the rotary recheck after passing through the suspected problem area, as shown in fig. 3, 5, 6, 7, 8 and 11:
the first rotary transducer 21 includes:
the first outer gear ring 211 is rotatably arranged in the middle shaft tube 1, the first outer gear ring 211 is connected with the first paddle wheel 2, and the central axis of the first outer gear ring 211 is collinear with the central axis of the first paddle wheel 2; the first closed ring is arranged on the outer side surface of the middle shaft tube 1 and consists of first circular ring plates which are parallel to each other; the second gear 212 is rotatably arranged outside the middle shaft tube 1, a first notch communicated with the inside of the middle shaft tube 1 is arranged on the outer side surface of the middle shaft tube 1, the first notch is positioned in the first closed ring, and the second gear 212 is meshed with the first outer gear ring 211 through the first notch; the first annular gear 213 is rotatably arranged in the first closed ring, the first annular gear 213 is meshed with the second gear 212, and the side surface of the first annular gear 213 is in sealing connection with the first annular plate through a sealing ring;
the outside of the middle shaft tube 1 is provided with a driving part 6 for driving the sensing element 3 to be close to the inner wall of the pipeline 9;
the driving part 6 includes: the limiting cylinder 61 is fixedly arranged on the outer edge surface of the first annular gear 213, a sliding rod 611 is slidably arranged on the limiting cylinder 61, and the sensing element 3 is fixedly arranged at the outer end of the sliding rod 611; a movable ring 63 rotatably provided on the outer side surface of the middle shaft tube 1, and a second link 631 having one end hinged to the surface of the movable ring 63, the other end of the second link 631 being hinged to the slide rod 611; the second linear driver 62 fixed outside the middle shaft tube 1, the second linear driver 62 is an electric push rod but not limited thereto, the output shaft of the second linear driver 62 is provided with a rotating block, the rotating block is rotationally connected with a circular groove arranged on the surface of the movable ring 63, and the movable ring 63 still keeps connection with the movable ring 63 when the movable ring 63 rotates along the middle shaft tube 1;
the first paddle wheel 2 comprises a ring body 22 and a plurality of blades 221 distributed on the periphery of the ring body 22 in a ring array, wherein the bottom end of each blade 221 is provided with a wheel shaft; the ring body 22 is connected with a first outer gear ring 211; the wheel axle passes through the axle hole arranged on the ring body 22, and extends into the ring body 22; a first gear 222 mounted on the axle; the first gears 222 are in one-to-one correspondence with the racks 225, and the first gears 222 are meshed with the corresponding racks 225; the first elastic element 224 is disposed in the buckle 223, the first elastic element 224 is a tension spring, but not limited thereto, one end of the first elastic element 224 is fixed to the inner wall of the buckle 223, and the other end of the first elastic element 224 is fixed to the side wall of the ring 22 facing the buckle 223;
the detection device further includes: a pull plate 23 provided on an output shaft of the first linear actuator 42 and a second elastic member 24 having one end fixed to the pull plate 23, the second elastic member 24 being a spring but not limited thereto, the other end of the second elastic member 24 being fixed to the connection ring 43; one end of the pull rope 25 is fixed on the pull plate 23 and a sheave arranged in the middle shaft tube 1, the pull rope 25 penetrates through the middle shaft tube 1 and bypasses the sheave, the other end of the pull rope 25 is provided with an end block, and the end block is rotationally connected with a rotating hole arranged on the outer side face of the pinch plate 223; the stay cord 25 runs through the department of central siphon 1 and is equipped with the sealing ring, and the fluid that avoids the inside central siphon 1 of stay cord 25 flows into isolated chamber from the department of running through sealing ring parcel stay cord 25, and the stay cord 25 direction of movement that is in the inside central siphon 1 receives the guide of sheave.
Specifically, the driving part 6 starts to work, the output end of the second linear driver 62 pushes the movable ring 63 to move, the sliding rod 611 is driven to move along the axial direction of the limiting cylinder 61 again through the second connecting rod 631 in the moving process of the movable ring 63, the sliding rod 611 finally drives the sensing element 3 to be close to the inner wall of the pipeline 9, and the sensing element 3 is also close to the inner wall of the pipeline 9 when the guiding wheel 411 is contacted with the inner wall of the pipeline 9, so that the pressure sensor sends a signal to the controller, and the controller stops the operation of the first linear driver 42 and simultaneously stops the operation of the second linear driver 62;
after the liquid passes through the first paddle wheel 2 and drives the first paddle wheel 2 to rotate, the first paddle wheel 2 drives the first outer gear ring 211 to rotate, the first outer gear ring 211 drives the second gear 212 to rotate, the second gear 212 drives the first inner gear ring 213 to rotate, and the first inner gear ring 213 drives the sensing element 3 to rotate along the axis of the middle shaft tube 1 through the sliding rod 611;
it should be noted here that in the present detecting device, the pulling plate 23, the second elastic member 24 and the pulling rope 25 are connected only with the inner support mechanism 4 on one side of the bottom bracket tube 1; the output end of the first linear driver 42 is divided into two ends to extend out, the first section of the first linear driver 42 pushes the connecting ring 43 to move through the second elastic element 24, so that the three guide wheels 411 surrounding the central shaft tube 1 are clung to the inner wall of the pipeline 9, but the pretightening force of the second elastic element 24 is not broken at the moment, and the first linear driver 42 still keeps the extending space; the stay cord 25 connected to the pull plate 23 is kept in tension when the first linear actuator 42 completes the first stretch out, because of the allowance; when the data of suspected pipeline 9 defects appear in the ultrasonic inspection of the inner wall of the pipeline 9, the first linear driver 42 stretches out in the second section, the pull plate 23 controls the pinch plate 223 to move through the pull rope 25, the pinch plate 223 drives the first gear 222 to rotate through the rack 225 after moving, the first gear 222 immediately drives the blades 221 to rotate in angle, and after all the four blades 221 complete the angle rotation, the first paddle wheel 2 which rotates clockwise after the original fluid passes through is converted into anticlockwise rotation.
Since the inner wall of the pipe 9 will generate a certain amount of dirt after long-term use, in order to solve the technical problem of avoiding the influence of the wall dirt on the detection data due to the shielding of the sensing element 3, as shown in fig. 3, 4 and 12, it is further that, basically, as in the first embodiment:
the end of the middle shaft tube 1 far away from the valve 11 is provided with a second paddle wheel 7, the second paddle wheel 7 is of a mature prior art, so that details are not repeated here, the outside of the end of the middle shaft tube 1 is provided with a second rotary transducer 71,
the second rotary transducer 71 is in transmission connection with the second paddle wheel 7; the end part of the middle shaft tube 1 is further provided with a cleaning assembly 8 for cleaning the inner wall of the pipeline 9, the cleaning assembly 8 comprises an outer cover body 81, the outer cover body 81 is fixedly arranged at the end part of the middle shaft tube 1, the inner part of the outer cover body 81 is provided with an inner ring cavity 811 and an outer ring cavity 812, the inner ring cavity 811 is respectively communicated with the outer ring cavity 812 and the inside of the middle shaft tube 1, the outer cover body 81 is provided with a sliding ring 82, the sliding ring 82 is rotatably connected with the outer cover body 81, the sliding ring 82 seals the outer ring cavity 812, the output end of the second rotary transducer 71 is provided with an injection tube 83, the injection tube 83 is fixedly connected with the sliding ring 82, and a water inlet of the injection tube 83 penetrates through the sliding ring 82 and is communicated with the outer ring cavity 812;
the second rotary transducer 71 includes: the second outer gear ring 711 arranged in the middle shaft tube 1 is rotated, the second outer gear ring 711 is fixedly connected with the second paddle wheel 7, and the central axis of the second outer gear ring 711 is collinear with the central axis of the second paddle wheel 7; the second closed ring is arranged on the outer side surface of the middle shaft tube 1 and consists of second circular ring plates which are parallel to each other; the third gear 712 is rotatably arranged outside the middle shaft tube 1, a second gap communicated with the inside of the middle shaft tube 1 is arranged on the outer side surface of the middle shaft tube 1, the second gap is positioned in a second closed ring, the third gear 712 is meshed with the second outer gear 711 through the second gap, a second inner gear ring 713 is rotatably arranged in the second closed ring, the second inner gear ring 713 is meshed with the third gear 712, and the side surface of the second inner gear ring 713 is in sealing connection with the second circular ring plate through a sealing ring; the injection pipe 83 is fixedly connected with the outer side surface of the second ring gear 713.
Specifically, after the liquid passes through the first paddle wheel 2, the liquid continues to advance along the middle shaft tube 1 until flowing to the end part of the middle shaft tube 1, the liquid passes through the second paddle wheel 7 and then drives the second paddle wheel 7 to rotate, the second paddle wheel 7 drives the second outer gear 711 to rotate, the second outer gear 711 drives the third gear 712 to rotate, the third gear 712 drives the second inner gear 713 to rotate, the second inner gear 713 drives the jet tube 83 to rotate around the middle shaft tube 1, the liquid passing through the first paddle wheel 2 enters the inner ring cavity 811 and the outer ring cavity 812 in sequence, finally enters the jet tube 83, the liquid in the jet tube 83 is jetted to the inner wall of the pipeline 9 from the liquid outlet along with the rotation of the sliding ring 82, so that the cleaning effect on the pipe wall is achieved, the liquid outlet of the jet tube 83 is flat, the jet pressure is improved, and meanwhile the jet surface is enlarged.
In addition, the first linear driver 42 and the second linear driver 62 are also driven by electric power, and here, a battery may be installed in the device, and since the frequency used for each detection of the first linear driver 42 and the second linear driver 62 is low, the consumption of electric power is not high, and thus, the progress of the pipeline detection is not affected.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (10)
1. An electromagnetic ultrasonic detection device for a pipeline comprises a sensing element (3) for carrying out ultrasonic detection on the inner wall of the pipeline, a middle shaft pipe (1) with two ends communicated with each other and a first paddle wheel (2) rotatably arranged in the middle shaft pipe (1); the device is characterized by further comprising:
the two expansion elements are arranged on the middle shaft tube (1) and comprise an air bag (5) and an air supply assembly for inflating and deflating the air bag (5); the air bags (5) are used for sealing with the inner wall of the pipeline after being inflated to form an isolated cavity between the two air bags (5); a sensing element (3) is located within the isolation chamber;
a valve (11) for opening and closing the middle shaft tube (1), wherein the valve (11) is arranged at the end part of the middle shaft tube (1);
at least one internal support mechanism (4) for controlling the movement or the rest of the central shaft tube (1) after the fluid has been filled into the pipe;
the first rotary energy converter (21) is arranged outside the middle shaft tube (1), the first rotary energy converter (21) is in transmission connection with the first paddle wheel (2), the sensing element (3) is arranged at the output end of the first rotary energy converter (21), and the first rotary energy converter (21) is used for driving the sensing element (3) to rotate along the axis of the middle shaft tube (1) when fluid enters the middle shaft tube (1) to drive the first paddle wheel (2) to rotate.
2. A pipeline electromagnetic ultrasonic testing apparatus according to claim 1, wherein the internal stay mechanism (4) comprises:
the guide wheels (411) and a plurality of supporting pieces (41) distributed on the periphery of the middle shaft pipe (1) in an annular array mode, one end of each supporting piece (41) is hinged to the side surface of the middle shaft pipe (1), the guide wheels (411) are rotatably arranged at the other ends of the supporting pieces (41), and the central axis of each guide wheel (411) is perpendicular to the central axis of the middle shaft pipe (1);
the connecting device comprises a first linear driver (42) arranged on the outer side surface of a middle shaft tube (1) and a connecting ring (43) connected with an output shaft of the first linear driver (42), wherein the connecting ring (43) is sleeved on the outer side of the middle shaft tube (1), and the connecting ring (43) is in sliding connection with the middle shaft tube (1);
the surface of the connecting ring (43) is hinged with a first connecting rod (431), and the end part of the first connecting rod (431) is hinged with the supporting piece (41);
a locking assembly (412) for locking the guide wheel (411).
3. A pipeline electromagnetic ultrasonic detection apparatus as claimed in claim 2, wherein the locking assembly (412) comprises a first bevel gear (413), the first bevel gear (413) being fixedly arranged on the axle of the guiding wheel (411);
a second bevel gear (414) rotatably provided on the support member (41), the first bevel gear (413) being engaged with the second bevel gear (414);
the support (41) is also provided with a chuck (415) for controlling the rotation of the second bevel gear (414).
4. A pipeline electromagnetic ultrasonic detection device according to claim 2 or 3, characterized in that the air supply assembly comprises an air cavity (12) arranged in the pipe wall of the middle shaft pipe (1), the air cavity (12) is in a circular ring shape, an air hole is arranged at the joint of the air bag (5) and the middle shaft pipe (1), and the air hole is communicated with the air cavity (12);
the piston rings (44) are sleeved in the air cavity (12), and sealing rings are arranged on the inner side surface and the outer side surface of the piston rings (44) and are used for isolating the inside of the air cavity (12) from the external environment; the piston ring (44) is fixedly connected with the connecting ring (43).
5. A pipeline electromagnetic ultrasonic detection apparatus according to claim 1, wherein the expansion element further comprises a plurality of mesh-shaped supporting structures (51) arranged in the air bag (5), and the outer edge surface of the air bag (5) is made of elastic wear-resistant materials.
6. A pipeline electromagnetic ultrasonic testing apparatus according to claim 1, wherein the first rotary transducer (21) comprises:
the first outer gear ring (211) is rotationally arranged in the middle shaft tube (1), the first outer gear ring (211) is connected with the first paddle wheel (2), and the central axis of the first outer gear ring (211) is collinear with the central axis of the first paddle wheel (2);
the first closed ring is arranged on the outer side surface of the middle shaft tube (1) and consists of first circular ring plates which are parallel to each other;
the second gear (212) is rotatably arranged outside the middle shaft tube (1), a first gap communicated with the inside of the middle shaft tube (1) is formed in the outer side surface of the middle shaft tube, the first gap is positioned in the first closed ring, and the second gear (212) is meshed with the first outer gear ring (211) through the first gap;
the first annular gear (213) is rotatably arranged in the first closed ring, the first annular gear (213) is meshed with the second gear (212), and the side surface of the first annular gear (213) is in sealing connection with the first annular plate through a sealing ring;
the sensing element (3) is arranged at the outer edge of the first annular gear (213).
7. The electromagnetic ultrasonic detection apparatus for a pipeline according to claim 6, wherein a driving part (6) for driving the sensing element (3) to be close to the inner wall of the pipeline is arranged outside the middle shaft tube (1);
the driving member (6) includes:
the limiting cylinder (61) is fixedly arranged on the outer edge surface of the first annular gear (213), a sliding rod (611) is arranged on the limiting cylinder (61) in a sliding mode, and the sensing element (3) is fixedly arranged at the outer end of the sliding rod (611);
a movable ring (63) arranged on the outer side surface of the middle shaft tube (1) in a rotating way and a second connecting rod (631) one end of which is hinged with the surface of the movable ring (63), wherein the other end of the second connecting rod (631) is hinged with the sliding rod (611);
the second linear driver (62) is fixed outside the middle shaft tube (1), an output shaft of the second linear driver (62) is provided with a rotating block, and the rotating block is rotationally connected with a circular ring groove arranged on the surface of the movable ring (63).
8. A pipeline electromagnetic ultrasonic testing apparatus according to claim 6 or 7, wherein the first paddle wheel (2) comprises:
the device comprises a ring body (22) and a plurality of blades (221) distributed on the periphery of the ring body (22) in an annular array, wherein the bottom end of each blade (221) is provided with a wheel shaft; the ring body (22) is connected with a first outer gear ring (211); the wheel axle passes through the shaft hole arranged on the ring body (22), and extends into the ring body (22);
a first gear (222) mounted on the axle;
the first gears (222) are in one-to-one correspondence with the racks (225), and the first gears (222) are meshed with the corresponding racks (225);
the first elastic element (224) is arranged in the pinch plate (223), one end of the first elastic element (224) is fixed on the inner wall of the pinch plate (223), and the other end of the first elastic element (224) is fixed on the side wall, facing the pinch plate (223), of the ring body (22);
the detection device further includes:
a pulling plate (23) arranged on an output shaft of the first linear driver (42) and a second elastic element (24) with one end fixed on the pulling plate (23), wherein the other end of the second elastic element (24) is fixed on a connecting ring (43);
one end is fixed in stay cord (25) of arm-tie (23) and locates the sheave in central siphon (1), stay cord (25) run through central siphon (1), and bypass the sheave, just the other end of stay cord (25) is equipped with the end block, the end block rotates with the commentaries on classics hole that locates buckle (223) lateral surface and is connected.
9. The electromagnetic ultrasonic pipeline inspection device of claim 1, further comprising:
the second slurry wheel (7) is arranged at one end of the middle shaft tube (1) far away from the valve (11), and the second rotary energy converter (71) is arranged outside the middle shaft tube (1), and the second rotary energy converter (71) is in transmission connection with the second slurry wheel (7);
the cleaning assembly (8) is arranged on the middle shaft tube (1), the cleaning assembly (8) comprises an outer cover body (81), a sliding ring (82) and an injection pipe (83), the inner part of the outer cover body (81) is divided into an inner ring cavity (811) and an outer ring cavity (812), the inner ring cavity (811) is respectively communicated with the outer ring cavity (812) and the inner part of the middle shaft tube (1), the sliding ring (82) is rotationally connected with the outer cover body (81), the sliding ring (82) seals the outer ring cavity (812), the injection pipe (83) is arranged at the output end of the second rotary transducer (71), the injection pipe (83) is fixedly connected with the sliding ring (82), and a water inlet of the injection pipe (83) penetrates through the sliding ring (82) to be communicated with the outer ring cavity (812).
10. A pipeline electromagnetic ultrasonic testing apparatus according to claim 9, wherein the second rotary transducer (71) comprises:
the second outer gear ring (711) is rotationally arranged in the middle shaft tube (1), the second outer gear ring (711) is fixedly connected with the second paddle wheel (7), and the central axis of the second outer gear ring (711) is collinear with the central axis of the second paddle wheel (7);
the second closed ring is arranged on the outer side surface of the middle shaft tube (1) and consists of second circular ring plates which are parallel to each other;
a third gear (712) arranged outside the middle shaft tube (1) in a rotating way, a second gap communicated with the inside of the middle shaft tube (1) is arranged on the outer side surface of the middle shaft tube, the second gap is positioned in a second closed ring, and the third gear (712) is meshed with a second outer gear ring (711) through the second gap;
the second annular gear (713) is rotationally arranged in the second closed ring, the second annular gear (713) is meshed with the third gear (712), and the side surface of the second annular gear (713) is in sealing connection with the second annular plate through a sealing ring;
the injection pipe (83) is fixedly connected with the outer side surface of the second annular gear (713).
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| CN202310923826.4A CN116642959B (en) | 2023-07-26 | 2023-07-26 | Pipeline electromagnetic ultrasonic detection device |
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| CN116929662B (en) * | 2023-09-18 | 2023-12-15 | 广州广钢气体能源股份有限公司 | Device and method for detecting leakage of closed container based on ultrasonic active excitation |
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