CN113267150B - Ultrasonic wall thickness online monitoring device for oil and gas pipeline - Google Patents
Ultrasonic wall thickness online monitoring device for oil and gas pipeline Download PDFInfo
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- CN113267150B CN113267150B CN202110752002.6A CN202110752002A CN113267150B CN 113267150 B CN113267150 B CN 113267150B CN 202110752002 A CN202110752002 A CN 202110752002A CN 113267150 B CN113267150 B CN 113267150B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
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Abstract
The invention relates to an ultrasonic wall thickness online monitoring device for an oil-gas pipeline, which comprises a probe structure, a probe bracket and a probe frame, wherein the probe structure is used for monitoring the wall thickness of the oil-gas pipeline online and comprises an ultrasonic probe which can be telescopically connected to the probe bracket along the radial direction of the pipeline; the guide structure comprises a circumferential guide rail structure and an axial guide rail structure, the circumferential guide rail structure comprises a first guide rail, and the probe support can rotate along the circumferential direction of the first guide rail so as to change the circumferential position of the ultrasonic probe; the axial guide rail structure comprises a second guide rail which is arranged along the axial direction of the pipeline, and the circumferential guide rail structure can move along the second guide rail so as to change the axial position of the ultrasonic probe; and the control part is used for receiving and transmitting ultrasonic signals, receiving and processing monitoring data of the ultrasonic probe and electrically controlling the probe structure and the guide structure, and the probe structure and the guide structure are electrically connected with the control part. The invention has the monitoring capability of multi-point position, axial full pipe length and circumferential 360 degrees, and can realize the online monitoring of the wall thickness of the variable pipe diameter.
Description
Technical Field
The invention relates to the technical field of ultrasonic monitoring in the petroleum and petrochemical industry, in particular to an ultrasonic wall thickness online monitoring device for an oil and gas pipeline.
Background
The oil and gas pipelines in the petroleum and petrochemical industry are numerous in quantity, wide in distribution, various in corrosion factors and complex in laying environment, and have greater risk potential hazards along with the increase of the age. In particular, in recent years, oil and gas pipelines are affected by third-party damage, natural geological disasters and the like, so that serious loss and potential huge harm are caused to the safe and stable operation of the pipelines. Therefore, there is a great need to monitor the wall thickness reduction state of the oil and gas pipeline in the heavy spot area.
The existing ultrasonic thickness measuring system generally arranges a plurality of ultrasonic probes at a certain angle on the circumference of the section of the same pipeline by utilizing a bracket, a hoop and the like, and fixes the ultrasonic probes on the outer wall of the pipeline. And the circumferential probe groups are arranged at certain intervals in the axial direction of the pipeline to form an ultrasonic probe array. Each probe is respectively connected with an ultrasonic receiving and transmitting device, and the wall thickness of the pipeline at the point position where each probe is located is monitored through processing of an ultrasonic receiving and transmitting system.
Most of the existing ultrasonic thickness measuring equipment can only carry out fixed-point thickness measurement, the scanning range is only limited to the fixed position of each ultrasonic probe, and the continuous pipeline wall thickness scanning without dead angles cannot be realized. For the areas which cannot be scanned, the areas need to be manually scanned on the spot for supplement, and larger time and labor cost are generated. A few of the disclosed ultrasonic thickness measuring devices can realize circumferential dead-angle-free scanning of the pipeline, but cannot realize axial long-distance continuous scanning of the pipeline.
Therefore, the inventor provides an ultrasonic wall thickness online monitoring device for an oil and gas pipeline by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide an ultrasonic wall thickness online monitoring device for an oil-gas pipeline, wherein an ultrasonic probe of the device can move axially, circumferentially and radially to adjust a testing position.
The invention aims to realize that the ultrasonic wall thickness online monitoring device for the oil and gas pipeline comprises a monitoring device,
the probe structure is used for monitoring the wall thickness of an oil and gas pipeline on line and comprises an ultrasonic probe, wherein the ultrasonic probe can be telescopically connected to a probe bracket along the radial direction of the pipeline;
the probe bracket can rotate along the circumferential direction of the first guide rail so as to change the circumferential position of the ultrasonic probe; the axial guide rail structure comprises a second guide rail which is arranged along the axial direction of the pipeline, and the circumferential guide rail structure can move along the second guide rail so as to change the axial position of the ultrasonic probe;
the control part is used for receiving and transmitting ultrasonic signals, receiving and processing monitoring data of the ultrasonic probe and electrically controlling the probe structure and the guide structure, and the probe structure and the guide structure are electrically connected with the control part.
In a preferred embodiment of the present invention, the probe holder includes a probe protection case for protecting the ultrasonic probe, and the ultrasonic probe is slidably and telescopically sleeved in the probe protection case; a telescopic driving part is arranged in the probe protection shell and used for driving the ultrasonic probe to stretch and retract along the radial direction of the pipeline; and a couplant spraying structure is further arranged in the probe protective shell and used for filling couplant between the ultrasonic probe and the pipeline.
In a preferred embodiment of the present invention, a through mounting hole is provided in the probe protection shell, the telescopic driving part includes a hydraulic cylinder, the hydraulic cylinder is electrically connected to the control part, the hydraulic cylinder includes a cylinder barrel and a cylinder rod, the cylinder barrel is sleeved in the mounting hole, one end of the cylinder rod is connected to a first end of the multi-stage probe holder after passing through the cylinder barrel in a sealing and sliding manner, a second end of the multi-stage probe holder is connected to the ultrasonic probe, and the hydraulic cylinder drives the ultrasonic probe to extend and retract along a pipeline in a radial direction through the multi-stage probe holder.
In a preferred embodiment of the present invention, the multi-stage probe holder includes a hollow primary probe holder, a secondary probe holder, and a tertiary probe holder, the ultrasonic probe is sleeved in the primary probe holder, the primary probe holder is telescopically sleeved in the secondary probe holder, a top end of the secondary probe holder is sealed, a top end of the secondary probe holder is telescopically sleeved in the tertiary probe holder, and a top end of the tertiary probe holder is connected to one end of the cylinder rod.
In a preferred embodiment of the invention, the secondary probe frame and the primary probe frame are communicated to form the couplant spraying structure, inner cavities of the secondary probe frame and the primary probe frame form a couplant accommodating cavity, and a couplant spraying hole is axially arranged in the side wall of the primary probe frame in a penetrating manner.
In a preferred embodiment of the present invention, a probe driving wheel is disposed on an outer wall of the probe protection casing, the probe driving wheel is electrically connected to the control portion, and the probe driving wheel can drive the probe structure to rotate along a circumferential direction of the first guide rail.
In a preferred embodiment of the present invention, a guide rail channel is circumferentially arranged on a side wall of the first guide rail, the guide rail channel radially penetrates along the first guide rail, and the probe structure can rotate along the guide rail channel.
In a preferred embodiment of the present invention, the first guide rail includes 2 circumferential rings spaced along the axial direction, the guide rail channel is formed between the 2 circumferential rings, the adjacent side surfaces of the 2 circumferential rings are concavely provided with a driving wheel guide groove, the probe structure is provided with a probe driving wheel, and the probe driving wheel can rotate along the driving wheel guide groove; 2 the circumference circles are connected through a guide rail axial fixing frame.
In a preferred embodiment of the present invention, an accommodating notch is formed on a radial inner side of each of the 2 circumferential rings, the accommodating notch can be sleeved on an outer side of the second guide rail, a side guide wheel and a horizontal guide wheel are arranged on the guide rail axial fixing frame, and the side guide wheel and the horizontal guide wheel can move along the second guide rail.
In a preferred embodiment of the present invention, the axial guide rail structure includes a plurality of second guide rails, the second guide rails are connected by a plurality of annular fixing frames, an outer diameter of each annular fixing frame is smaller than an inner diameter of the first guide rail, and the axial guide rail structure can be fixedly sleeved on the pipeline.
From the above, the ultrasonic wall thickness online monitoring device for the oil and gas pipeline provided by the invention has the following beneficial effects:
according to the ultrasonic wall thickness online monitoring device for the oil-gas pipeline, the ultrasonic probe can stretch and contract along the radial direction of the pipeline to change the monitored radial position, and the ultrasonic probe can realize axial and circumferential position control through the guide structure, so that the device has the monitoring capabilities of multiple points, axial full-pipe length and circumferential 360 degrees; for the change of the pipe diameter of the pipeline in a small range, the device does not need to be replaced, and the online monitoring of the wall thickness of the pipe with the variable diameter can be realized; the structure part of the invention is matched with the control part, thus realizing the complete online monitoring function of the ultrasonic wall thickness of the oil and gas pipeline.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: the invention relates to a structure diagram of an ultrasonic wall thickness online monitoring device for an oil and gas pipeline.
FIG. 2 a: is a perspective view of the probe structure of the present invention.
FIG. 2 b: is a front view of the probe structure of the present invention.
FIG. 2 c: shown in cross-section a-a in fig. 2 b.
FIG. 3 a: is a perspective view of the circumferential guide rail structure of the present invention.
FIG. 3 b: is a front view of the circumferential guide rail structure of the present invention.
FIG. 3 c: shown in cross-section B-B in fig. 3B.
FIG. 3 d: which is a view towards C in fig. 3 b.
FIG. 3 e: shown in cross-section at D-D in fig. 3D.
FIG. 4 a: is a perspective view of the axial guide rail structure of the present invention.
FIG. 4 b: is a front view of the axial guide rail structure of the present invention.
FIG. 4 c: shown in cross-section E-E in fig. 4 b.
FIG. 5: the invention is a working schematic diagram of the ultrasonic wall thickness online monitoring device for the oil and gas pipeline.
FIG. 6: is a work flow block diagram of the control part of the invention.
In the figure:
100. an ultrasonic wall thickness online monitoring device for an oil and gas pipeline;
1. a probe structure;
11. an ultrasonic probe; 12. a probe holder; 13. a probe protective case; 14. a hydraulic cylinder; 141. a cylinder barrel; 142. a cylinder rod; 15. a multi-stage probe holder; 151. a primary probe holder; 152. a secondary probe holder; 153. a third-stage probe frame; 16. a probe driving wheel;
2. a circumferential guide rail structure;
21. a first guide rail; 211. a circumferential ring; 2111. a semi-circumferential guide rail; 2112. a guide rail circumferential fixing frame; 2113. circumferential locking bolts; 2114. a circumferential lock nut; 212. a drive wheel guide groove;
22. a guide rail channel; 23. the guide rail is fixed on the axial direction; 24. accommodating the notch; 25. a side guide wheel; 26. a horizontal guide wheel; 27. a guide wheel support frame; 271. an axial locking bolt; 272. an axial lock nut;
3. an axial guide rail structure;
31. a second guide rail; 32. an annular fixing frame; 321. a semi-annular fixed mount; 33. an annular fixed mount hinge; 34. a hinge lock nut; 35. a hinge locking bolt;
4. a pipeline.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 6, the present invention provides an ultrasonic wall thickness online monitoring device 100 for an oil and gas pipeline, comprising,
the probe structure 1 is used for monitoring the wall thickness of an oil and gas pipeline on line and comprises an ultrasonic probe 11, wherein the ultrasonic probe 11 can be telescopically connected to a probe bracket 12 along the radial direction of the pipeline 4;
the guide structure comprises a circumferential guide rail structure 2 and an axial guide rail structure 3, the circumferential guide rail structure 2 comprises a first guide rail 21 which is circumferentially arranged, and the probe support 12 can rotate along the circumferential direction of the first guide rail 21 to change the circumferential position of the ultrasonic probe 11; the axial guide rail structure 3 comprises a second guide rail 31, the second guide rail 31 is arranged along the axial direction of the pipeline, and the circumferential guide rail structure 2 can move along the second guide rail 31 to change the axial position of the ultrasonic probe 11;
and the control part is used for receiving and transmitting ultrasonic signals, receiving and processing monitoring data of the ultrasonic probe and electrically controlling the probe structure and the guide structure, and the probe structure 1 and the guide structure are electrically connected with the control part.
According to the ultrasonic wall thickness online monitoring device for the oil-gas pipeline, the ultrasonic probe can stretch and contract along the radial direction of the pipeline to change the monitored radial position, and the ultrasonic probe can realize axial and circumferential position control through the guide structure, so that the device has the monitoring capabilities of multiple points, axial full-pipe length and circumferential 360 degrees; for the change of the pipe diameter of the pipeline in a small range, the device does not need to be replaced, and the online monitoring of the wall thickness of the pipe with the variable diameter can be realized; the structure part of the invention is matched with the control part, thus realizing the complete online monitoring function of the ultrasonic wall thickness of the oil and gas pipeline.
Further, as shown in fig. 1, fig. 2a, fig. 2b, and fig. 2c, the probe holder 12 includes a probe protection case 13 for protecting the ultrasonic probe 11, and the ultrasonic probe 11 is slidably, telescopically and sleeved in the probe protection case 13; a telescopic driving part is arranged in the probe protection shell 13 and is used for driving the ultrasonic probe 11 to stretch and retract along the radial direction of the pipeline; a couplant spraying structure is further arranged in the probe protection shell 13 and used for filling couplant between the ultrasonic probe 11 and the pipeline. In this embodiment, the probe protective case 13 is composed of two symmetrical parts and is fixed by four sets of bolts.
In the present embodiment, as shown in fig. 2c, a through mounting hole is provided in the probe protection case 13, the telescopic driving part includes a hydraulic cylinder 14, the hydraulic cylinder 14 is electrically connected to the control part, the hydraulic cylinder 14 includes a cylinder tube 141 and a cylinder rod 142, the cylinder tube 141 is sleeved in the mounting hole, one end of the cylinder rod 142 is connected to the first end of the multi-stage probe holder 15 after sliding through the cylinder tube 141 in a sealing manner, the second end of the multi-stage probe holder 15 is connected to the ultrasonic probe 11, and the hydraulic cylinder 14 drives the ultrasonic probe 11 to extend and retract along the radial direction of the pipeline through the multi-stage probe holder 15.
Further, as shown in fig. 2c, the multi-stage probe holder 15 includes a hollow first-stage probe holder 151, a second-stage probe holder 152 and a third-stage probe holder 153, the ultrasonic probe 11 is sleeved in the first-stage probe holder 151, the first-stage probe holder 151 is sleeved in the second-stage probe holder 152 in a retractable manner, the top end of the second-stage probe holder 152 is sealed, the top end of the second-stage probe holder 152 is sleeved in the third-stage probe holder 153 in a retractable manner, the top end of the third-stage probe holder 153 is connected with one end of the cylinder rod 142, and in this embodiment, the top end of the third-stage probe holder 153 is welded and fixed to one end of the cylinder rod 142. The expansion and contraction of the probe holders at each stage is realized by the control part, so that the radial extension distance of the ultrasonic probe 11 fixed in the probe holder 151 at the first stage is adjustable.
Further, as shown in fig. 2c, the secondary probe holder 152 and the primary probe holder 151 are communicated to form a couplant spraying structure, inner cavities of the secondary probe holder 152 and the primary probe holder 151 form a couplant accommodating cavity, and a couplant spraying hole is axially arranged in the side wall of the primary probe holder 151 in a penetrating manner. The couplant spray structure can fill the gap between the pipe and the ultrasonic probe 11 when the ultrasonic probe 11 moves.
Further, as shown in fig. 2a and 2b, a probe driving wheel 16 is provided on an outer wall of the probe protective case 13, the probe driving wheel 16 is electrically connected to the control unit, and the probe driving wheel 16 can drive the probe structure 1 to rotate along the circumferential direction of the first guide rail 21.
As shown in fig. 2a, 2b, and 2c, in the present embodiment, the probe guard 13 is a square case, 4 probe driving wheels 16 are attached to the outer side wall of the probe guard 13, the probe driving wheels 16 are driven by the control unit, and the probe structure 1 can be rotated circumferentially within the first guide rail 21 by the rotation of the probe driving wheels 16.
Further, as shown in fig. 3a and 3e, a guide rail channel 22 is circumferentially disposed on a side wall of the first guide rail 21, the guide rail channel 22 radially penetrates along the first guide rail 21, and the probe structure 1 can rotate along the guide rail channel 22.
Further, as shown in fig. 3a, 3c, and 3e, the first guide rail 21 includes 2 circumferential rings 211 spaced along the axial direction, a guide rail channel 22 is formed between the 2 circumferential rings 211, a drive wheel guide groove 212 is concavely disposed on the adjacent side surface of the 2 circumferential rings 211, the probe structure 1 is provided with a probe drive wheel 16, and the probe drive wheel 16 can rotate along the drive wheel guide groove 212; the 2 circumferential rings 211 are connected by a guide rail axial fixing frame 23.
Further, as shown in fig. 3a, 3c, 3d, and 3e, the radial inner sides of the 2 circumferential rings are provided with accommodating notches 24, the accommodating notches 24 can be sleeved on the outer side of the second guide rail 31, the guide rail axial fixing frame 23 is provided with a side guide wheel 25 and a horizontal guide wheel 26, and the side guide wheel 25 and the horizontal guide wheel 26 can move along the second guide rail 31.
In an embodiment of the present invention, as shown in fig. 3a, 3b, 3c, 3d, and 3e, each circumferential ring 211 is composed of 2 semi-circumferential guide rails 2111, through holes are formed at two ends and a middle portion of each semi-circumferential guide rail 2111, and two semi-circumferential guide rails 2111 on the same circumference are inserted by a guide rail circumferential fixing frame 2112 and are fixed by a circumferential locking bolt 2113 and a circumferential locking nut 2114. The 2 circumferential rings 211 are constrained by the 2 guide rail axial fixing frames 23, and guide wheel supporting frames 27 are respectively arranged on two sides of each guide rail axial fixing frame 23 and are fixed by axial locking bolts 271 and axial locking nuts 272. The side guide wheel 25 and the horizontal guide wheel 26 are mounted on a guide wheel support frame 27 and driven by a control section.
Further, as shown in fig. 4a, 4b, and 4c, the axial guide rail structure 3 includes a plurality of second guide rails 31, the plurality of second guide rails 31 are connected by a plurality of annular fixing frames 32, an outer diameter of the annular fixing frame 32 is smaller than an inner diameter of the first guide rail 21, and the axial guide rail structure 3 can be fixedly sleeved on the pipeline.
In the present embodiment, as shown in fig. 4a, 4b, and 4c, each ring holder 32 is composed of 2 semi-ring holders 321, each of which has a circular through hole at its end for inserting the ring holder hinge 33 and is fixed by a hinge lock nut 34 and a hinge lock bolt 35. The position that needs to install annular mount 32 on second guide rail 31 sets up square through hole, and it has square groove to open on each semi-annular mount 321, and each semi-annular mount 321 passes from the square through hole on second guide rail 31, and its square groove and square through hole cooperation, annular mount 32 locks second guide rail 31 in oil gas pipeline outer wall.
The control part of the invention mainly comprises a power supply circuit, a singlechip control circuit, a booster circuit, a pulse transmitting circuit, an amplitude limiting circuit, a signal amplifying circuit, a filter circuit, a wave detecting circuit, a time measuring circuit and the like. Fig. 6 shows a block diagram of the control unit. The power supply circuit supplies power to other circuits, the single chip microcomputer control circuit controls the high-voltage module to convert stable direct current signals into high-voltage pulses, and the high-voltage pulses are input into the piezoelectric ultrasonic transducer in the ultrasonic probe, so that ultrasonic waves are excited and transmitted into the wall of the oil-gas pipeline. The ultrasonic wave is reflected at the critical surface of the oil gas pipeline and the air and then enters the ultrasonic probe again, and the ultrasonic transducer converts the ultrasonic wave into a high-frequency pulse electric signal. The high-frequency pulse electric signal is converted into a detectable waveform electric signal through eliminating a front-end circuit peak through an amplitude limiting circuit, amplifying and attenuating a signal through a signal amplifying circuit, band-pass noise reduction of a filter circuit and envelope frequency reduction of a detection circuit. The time measuring circuit controlled by the singlechip control circuit obtains the pipe wall value of the oil-gas pipeline by measuring the time difference value of the primary echo and the secondary echo which are easy to measure and converting the wave speed, transmits the thickness measuring data to the network cloud platform through the wireless data transmission module, and then reads and analyzes the pipe wall value by the data detection platform to judge the corrosion and failure probability of the pipe wall of the oil-gas pipeline.
The installation and use method of the invention is as follows:
1) the semi-annular fixing frame 321 is inserted into the square through hole of the second guide rail 31 and attached to the outer wall of the oil-gas pipeline to be tested. Inserting the annular fixing frame hinge 33 into the end through hole of the semi-annular fixing frame 321, and locking the hinge locking nut 34 and the hinge locking bolt 35 to fix the second guide rail 31 with the outer wall of the oil-gas pipeline to be detected;
2) and manufacturing the hydraulic cylinder 14 and the multi-stage probe frame 15. Inserting the primary probe holder 151, the secondary probe holder 152 and the tertiary probe holder 153 step by step, connecting the inserted probe holders with the hydraulic cylinder 14, and fixing the ultrasonic probe 11 with the primary probe holder 151;
3) installing a probe driving wheel 16 on a probe protective shell 13, placing a hydraulic cylinder 14 and a multi-stage probe frame 15 into the probe protective shell 13, and fixing by using 4 groups of bolts;
4) installing the side guide wheel 25 and the horizontal guide wheel 26 on a guide wheel support frame 27; the guide wheel support frame 27 is connected to two sides of each guide rail axial fixing frame 23 and is fixed by an axial locking bolt 271 and an axial locking nut 272;
5) every 2 semi-circular guide rails 2111 form a half of the guide rail channel 22 at intervals along the axial direction, the probe structure 1 is inserted into the guide rail channel 22, the guide wheel support frame 27 is connected for axial positioning connection, the guide wheel support frame 27 is integrally arranged on the second guide rail 31, the guide rail circumferential fixing frame 2112 is inserted into a through hole at the end part of the semi-circular guide rail 2111, and a circumferential locking bolt 2113 and a circumferential locking nut 2114 are used for fixing; the assembled state is shown in fig. 5;
6) the assembly control part is electrically connected with the ultrasonic probe 11, the primary probe frame 151, the secondary probe frame 152, the tertiary probe frame 153, the hydraulic cylinder 14, the probe driving wheel 16, the side guide wheel 25 and the horizontal guide wheel 26, and is used for filling coupling agent into probe structures (inner cavities of the secondary probe frame 152 and the primary probe frame 151);
7) and testing the motion effect of each motion mechanism, the telescopic effect of the probe structure and the couplant filling effect to ensure that the structure end operates normally.
8) Connecting an ultrasonic transceiver circuit module and a remote transmission module of the control part with the probe structure, and testing the operation condition of the circuit end to ensure that the circuit end operates normally;
9) and (5) detecting the wall thickness of the pipeline and remotely monitoring and analyzing the terminal.
From the above, the ultrasonic wall thickness online monitoring device for the oil and gas pipeline provided by the invention has the following beneficial effects:
according to the ultrasonic wall thickness online monitoring device for the oil-gas pipeline, the ultrasonic probe can stretch and contract along the radial direction of the pipeline to change the monitored radial position, and the ultrasonic probe can realize axial and circumferential position control through the guide structure, so that the device has the monitoring capabilities of multiple points, axial full-pipe length and circumferential 360 degrees; for the change of the pipe diameter of the pipeline in a small range, the device does not need to be replaced, and the online monitoring of the wall thickness of the pipe with the variable diameter can be realized; the structure part of the invention is matched with the control part, thus realizing the complete online monitoring function of the ultrasonic wall thickness of the oil and gas pipeline.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (7)
1. An ultrasonic wall thickness on-line monitoring device for an oil-gas pipeline is characterized by comprising,
the probe structure is used for monitoring the wall thickness of an oil and gas pipeline on line and comprises an ultrasonic probe, wherein the ultrasonic probe can be telescopically connected to a probe bracket along the radial direction of the pipeline;
the probe bracket can rotate along the circumferential direction of the first guide rail so as to change the circumferential position of the ultrasonic probe; the axial guide rail structure comprises a second guide rail which is arranged along the axial direction of the pipeline, and the circumferential guide rail structure can move along the second guide rail so as to change the axial position of the ultrasonic probe;
the control part is used for receiving and transmitting ultrasonic signals, receiving and processing monitoring data of the ultrasonic probe and electrically controlling the probe structure and the guide structure, and the probe structure and the guide structure are electrically connected with the control part;
the probe bracket comprises a probe protection shell for protecting the ultrasonic probe, and the ultrasonic probe can be sleeved in the probe protection shell in a sliding and telescopic manner; a telescopic driving part is arranged in the probe protection shell and used for driving the ultrasonic probe to stretch and retract along the radial direction of the pipeline; a couplant spraying structure is further arranged in the probe protection shell and used for filling couplant between the ultrasonic probe and the pipeline;
a through mounting hole is formed in the probe protection shell, the telescopic driving part comprises a hydraulic cylinder, the hydraulic cylinder is electrically connected with the control part, the hydraulic cylinder comprises a cylinder barrel and a cylinder rod, the cylinder barrel is sleeved in the mounting hole, one end of the cylinder rod is connected with a first end of a multi-stage probe frame after hermetically sliding through the cylinder barrel, a second end of the multi-stage probe frame is connected with the ultrasonic probe, and the hydraulic cylinder drives the ultrasonic probe to radially extend and retract along a pipeline through the multi-stage probe frame;
the multi-stage probe frame comprises a hollow one-stage probe frame, a second-stage probe frame and a third-stage probe frame, the ultrasonic probe is sleeved in the one-stage probe frame, the first-stage probe frame can stretch and retract, the second-stage probe frame can stretch and retract, the top end of the second-stage probe frame is sealed, the top end of the second-stage probe frame can stretch and retract, the third-stage probe frame can be sleeved in the third-stage probe frame, and the top end of the third-stage probe frame is connected with one end of the cylinder rod.
2. The ultrasonic wall thickness online monitoring device for the oil and gas pipeline as claimed in claim 1, wherein the secondary probe holder and the primary probe holder are communicated to form the couplant spraying structure, inner cavities of the secondary probe holder and the primary probe holder form a couplant accommodating cavity, and a couplant spraying hole is axially arranged in a side wall of the primary probe holder in a penetrating manner.
3. The ultrasonic wall thickness online monitoring device for the oil and gas pipeline as claimed in claim 1, wherein a probe driving wheel is arranged on the outer wall of the probe protection shell, the probe driving wheel is electrically connected with the control part, and the probe driving wheel can drive the probe structure to rotate along the circumferential direction of the first guide rail.
4. The ultrasonic online wall thickness monitoring device for oil and gas pipelines according to claim 1, wherein a guide rail channel is circumferentially arranged on the side wall of the first guide rail, the guide rail channel radially penetrates along the first guide rail, and the probe structure can rotate along the guide rail channel.
5. The ultrasonic online wall thickness monitoring device for oil and gas pipelines according to claim 4, wherein the first guide rail comprises 2 circumferential rings spaced along the axial direction, the guide rail channel is formed between the 2 circumferential rings, the adjacent side surfaces of the 2 circumferential rings are concavely provided with drive wheel guide grooves, the probe structure is provided with a probe drive wheel, and the probe drive wheel can rotate along the drive wheel guide grooves; 2 the circumference circles are connected through a guide rail axial fixing frame.
6. The ultrasonic online wall thickness monitoring device for the oil and gas pipeline as claimed in claim 5, wherein a receiving notch is formed on a radial inner side of 2 of the circumferential rings, the receiving notch can be sleeved on an outer side of the second guide rail, a side guide wheel and a horizontal guide wheel are arranged on the guide rail axial fixing frame, and the side guide wheel and the horizontal guide wheel can move along the second guide rail.
7. The ultrasonic wall thickness online monitoring device for oil and gas pipelines according to claim 1, wherein the axial guide rail structure comprises a plurality of second guide rails, the second guide rails are connected through a plurality of annular fixing frames, the outer diameter of each annular fixing frame is smaller than the inner diameter of the first guide rail, and the axial guide rail structure can be fixedly sleeved on the pipeline.
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