CN210690483U - Piezoelectric ultrasonic flaw detection internal detector for long-distance pipeline - Google Patents
Piezoelectric ultrasonic flaw detection internal detector for long-distance pipeline Download PDFInfo
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- CN210690483U CN210690483U CN201920762887.6U CN201920762887U CN210690483U CN 210690483 U CN210690483 U CN 210690483U CN 201920762887 U CN201920762887 U CN 201920762887U CN 210690483 U CN210690483 U CN 210690483U
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Abstract
The utility model discloses a long defeated pipeline piezoelectricity ultrasonic inspection internal detector, including one with the anterior spacing frame and a plurality of rear portion detection arm of pipeline internal diameter adaptation, anterior spacing frame and rear portion detection arm all are made by elastic material, anterior spacing frame is equipped with that the front end passes through lid and a plurality of equipartition pass through the back bend engaging jaw around the lid at the front end, rear portion detection arm adopts bending structure, the horizontal connection section of rear portion detection arm is in the same place with the back bend engaging jaw rigid coupling of anterior spacing frame, all rear portion detection arms's trend is unanimous, all install a plurality of thickness measuring probes and a plurality of probe of detecting a flaw on every rear portion detection arm, the slope detection section of two adjacent rear portion detection arms links together through a plurality of V type spring pieces, the whole circumference of the sound field cover pipeline of all probe of detecting a flaw, the whole circumference of the sound field cover pipeline of all thickness measuring probes. The utility model discloses can accomplish pipeline wall thickness loss type defect and crack defect and detect comprehensively in one-time operation.
Description
Technical Field
The utility model belongs to the technical field of detect in the supersound, a long defeated pipeline piezoelectricity ultrasonic inspection internal detector is related to.
Background
With the development of the oil and gas industry and the increase of the energy demand of the related industry, the development of the long-distance oil and gas transportation pipeline in China is rapid, and by the end of 2025 years, the oil and gas pipeline in China is expected to reach 25 kilometers, wherein the oil pipeline of a crude oil finished product can reach about 8 kilometers. Oil gas pipeline all can lead to the fact the corruption to the pipe wall metal at the inside transport medium of operation in-process pipeline and peripheral geographical environment, thereby can lead to the fact the stress concentration in corrosion zone to produce the crackle under the effect of external and pipeline internal pressure, and the crackle expansion on the pipe wall will take place to reveal to a certain extent. In order to ensure the safe operation of oil and gas pipelines, the regular inspection of the corrosion condition of the pipelines and the timely maintenance become necessary measures for the management of the integrity of the pipelines, and the internal detection is the best way for acquiring the integrity data of the pipelines.
At present, the pipeline internal detectors mainly have three types: a leakage flux internal detector, an electromagnetic ultrasonic internal detector and a piezoelectric ultrasonic internal detector. The magnetic flux leakage internal detector is mainly used for researching the volume type defects of the pipeline, and the detection effects of crack defects and corrosion of the large-wall-thickness pipe body are poor; the electromagnetic ultrasonic internal detector can be used for corrosion detection of a gas pipeline by utilizing an ultrasonic guided wave technology, and the technology has the advantages of low probe sensitivity and poor signal-to-noise ratio; the piezoelectric ultrasonic internal detector is mainly used for corrosion and crack detection of oil pipelines, and has the advantages of high detection precision, simple defect quantification model and strong wall thickness adaptability. The PII company provides a method for gathering a group of thickness measuring probes together and arranging the probes along the circumferential direction of a central skeleton of a detection section to realize the full coverage of the piezoelectric ultrasonic detection of the pipe wall, and the method can effectively realize the corrosion detection of the pipe wall thickness but cannot realize the online detection of the crack defect of the pipe at the same time. At present, partial manufacturers respectively develop piezoelectric ultrasonic wall thickness detection equipment and piezoelectric ultrasonic crack detection equipment, the wall thickness detection and the crack detection are used as independent functional modules to respectively carry out pipeline detection operation, the problems of high detection cost and incapability of comprehensively analyzing wall thickness loss type defects and crack defects exist in the actual detection process, and the market popularization and application are difficult.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the well-known technology and provide one kind and can accomplish pipeline wall thickness loss type defect and crack defect comprehensive detection's long defeated pipeline piezoelectricity ultrasonic inspection internal detector in one-time operation.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a piezoelectric ultrasonic flaw detection internal detector for long-distance pipelines comprises a front limiting frame matched with the inner diameter of a pipeline and a plurality of rear detecting arms, wherein the front limiting frame and the rear detecting arms are made of elastic materials, the front limiting frame is provided with a front transparent cover and a plurality of backward-bending connecting claws uniformly distributed on the periphery of the front transparent cover, the rear detecting arms adopt a bending structure and are provided with a horizontal connecting section and an inclined detecting section, the horizontal connecting section of the rear detecting arms is fixedly connected with the backward-bending connecting claws of the front limiting frame in a one-to-one correspondence manner, all the rear detecting arms have consistent inclination, a plurality of thickness measuring probes and a plurality of flaw detection probes are arranged on the inclined detecting section of each rear detecting arm, the inclined detecting sections of the adjacent two rear detecting arms are connected together through a plurality of V-shaped spring pieces, and the sound field of the flaw detection probes covers the whole circumferential direction of the pipeline, and the sound fields of two adjacent flaw detection probes are mutually independent, the sound fields of all the thickness measurement probes cover the whole circumferential direction of the pipeline, the sound fields of two adjacent thickness measurement probes are mutually independent, and the sound fields of the adjacent thickness measurement probes and the flaw detection probes are independent.
The thickness measuring probes are arranged at intervals along the length direction of the inclined detection section of the rear detection arm, the flaw detection probes are arranged at intervals along the length direction of the inclined detection section of the rear detection arm, and the adjacent thickness measuring probes and the flaw detection probes are arranged at intervals.
The thickness measuring probe and the flaw detection probe on one rear detection arm are arranged on different straight lines.
The plurality of flaw detection probes are uniformly arranged along the length direction of the inclined detection section of the rear detection arm.
The thickness measuring probes are uniformly arranged along the length direction of the inclined detection section of the rear detection arm.
And the flaw detection probes and the thickness measurement probes on the inclination detection section of each rear detection arm are arranged at intervals in a staggered manner.
And the horizontal connecting section of the rear detection arm is fixedly connected with the backward bent connecting claw of the front limiting frame by a rigid connecting plate.
The front limiting frame and the rear detection arm are both made of polyurethane.
The utility model has the advantages and positive effects that: the rear detection arms are combined together by the V-shaped spring piece and connected to the rear part of the front limiting frame, and the self-adaptive deformation of the inner detector is realized by the elasticity of the rear detection arms and the front limiting frame and the elasticity of the V-shaped spring piece, so that the high passing performance and the structural stability of the inner detector can be ensured, and the acquisition quality of ultrasonic signals is ensured; the inclination detection section of the rear detection arm forms a certain angle with the axial direction of the pipeline, and all probes are positioned at different circumferential positions of the pipeline, so that the full coverage of the circumferential detection of the pipeline is realized. Therefore the utility model discloses can accomplish the comprehensive detection of pipeline wall thickness loss type defect and crackle defect in one shot operation, greatly promote the work efficiency of pipeline supersound internal detection and submarine pipeline's integrality management level.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the tilt detection section of the rear detection arm according to the present invention;
FIG. 3 is a cross-sectional view of the present invention at the flaw detection probe;
fig. 4 is a schematic structural view of the rear detection arm of the present invention;
fig. 5 is a schematic structural view of the front limiting frame of the present invention.
In the figure: 1. a front limiting frame; 1-1, a front transparent cover; 1-2, connecting claws in a backward bending way; 2. a rear detection arm; 2-1, a horizontal connecting section; 2-2, an inclination detection section; 3. a thickness measuring probe; 4. a flaw detection probe; 5. v-shaped spring pieces.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 5, a long-distance pipeline piezoelectric ultrasonic flaw detection internal detector comprises a front limiting frame 1 and a plurality of rear detecting arms 2, wherein the front limiting frame 1 and the rear detecting arms 2 are both made of elastic materials, the front limiting frame 1 is provided with a front transparent cover 1-1 and a plurality of backward-bent connecting claws 1-2 uniformly distributed around the front transparent cover 1-1, the rear detecting arms 2 adopt a bending structure and are provided with horizontal connecting sections 2-1 and inclined detecting sections 2-2, referring to fig. 4, the horizontal connecting sections 2-1 of the rear detecting arms 2 are fixedly connected with the backward-bent connecting claws 1-2 of the front limiting frame 1 in a one-to-one correspondence manner, the flaw detection tendency of all the rear detecting arms 2 is consistent, a plurality of thickness measuring probes 3 and a plurality of probes 4 are mounted on the inclined detecting sections 2-1 of each rear detecting arm 2, two adjacent the slope detection section 2-2 of rear portion test arm 2 links together through a plurality of V type spring pieces 5, all detect a flaw probe 4's sound field covers the whole circumference of pipeline, and adjacent two detect a flaw probe 4's sound field mutual independence, all thickness measuring probe 3's sound field covers the whole circumference of pipeline, and adjacent two thickness measuring probe 3's sound field mutual independence, adjacent thickness measuring probe 3 with detect a flaw probe 4 sound field independence.
In this embodiment, in order to effectively avoid mutual interference of sound fields among probes and facilitate arrangement of the thickness measuring probes 3 and the flaw detection probes 4, the thickness measuring probes 3 are arranged at intervals along the length direction of the inclined detection section of the rear detection arm, the flaw detection probes 4 are arranged at intervals along the length direction of the inclined detection section of the rear detection arm, and the adjacent thickness measuring probes 3 and the flaw detection probes 4 are arranged at intervals. Further, the plurality of flaw detection probes 4 are uniformly arranged along the length direction of the inclined detection section of the rear detection arm; the thickness measuring probes 3 are uniformly arranged along the length direction of the inclined detection section of the rear detection arm, and the flaw detection probes 4 and the thickness measuring probes 3 on the inclined detection section 2-2 of each rear detection arm 2 are arranged at intervals in a staggered mode. In order to ensure the strength of the rear detection arm 2 and facilitate the arrangement of the thickness measuring probe 3 and the flaw detection probe 4, the thickness measuring probe 3 and the flaw detection probe 4 on one rear detection arm 2 are arranged on different straight lines. In this embodiment, the horizontal connecting section 2-1 of the rear detection arm 2 and the backward-bent connecting claw 1-2 of the front limiting frame 1 are fixedly connected together by a rigid connecting plate. The front limiting frame 1 and the rear detection arm 2 are both made of polyurethane.
The internal detector is characterized in that:
1) arrangement structure of probe
The ultrasonic flaw detection probes 4 and the thickness measurement probes 3 are multiple, corresponding mounting holes are multiple, and the specific mounting quantity of the ultrasonic flaw detection probes 4 and the thickness measurement probes 3 is determined by the effective sound field area and the pipe wall perimeter. The thickness measuring/flaw detecting probes correspond to the mounting holes one by one and are arranged at equal intervals along the length direction of the inclined detection section of the rear detection arm, and the probes on the same rear detection arm are arranged at intervals, so that sound fields among different probes cannot form interference. Meanwhile, the inclined detection section of the rear detection arm forms a certain angle with the axial direction of the pipeline, so that all probes are positioned at different circumferential positions of the pipeline, and the full coverage of the circumferential detection of the pipeline is realized.
2) Mounting structure of probe
The axial direction of the thickness measuring probe mounting hole is vertical to the surface of the pipe wall, and the probe transmits ultrasonic longitudinal waves vertical to the surface of the pipe wall to detect the wall thickness loss of the pipe wall. The axial direction of the mounting hole of the flaw detection probe forms a certain angle with the normal direction of the surface of the pipe wall, so that ultrasonic waves emitted by the embedded probe are obliquely incident along the circumferential direction of the pipeline, 45-degree transverse waves propagating along the anticlockwise direction are generated in the pipe wall, and the axial cracks of the pipeline are effectively detected.
3) Connection structure of rear detection arm
A plurality of V-shaped spring pieces 5 are connected among the rear detection arms, seamless fitting between the rear detection arms and the inner surface of the pipe wall can be achieved by means of tension of the V-shaped spring pieces 5 and elasticity of a material of the rear detection arms, when the inner diameter of a pipeline changes, the rear detection arms generate self-adaptive deformation along with the tension, high passing performance and structural stability of the rear detection arms can be guaranteed all the time, and acquisition quality of ultrasonic signals is guaranteed.
4) Front limiting frame structure and connecting structure of front limiting frame structure and rear detecting arm
The horizontal connection section of the rear detection arm 2 and the backward-bending connection claw of the front limiting frame 1 are fixedly connected through a rigid connection plate, so that the axial connection and the axial limitation of the rear detection arm 2 and the front limiting frame 1 are realized, the plastic deformation of the rear detection arm 2 can be effectively reduced through the structure, and the service life of the rear detection arm 2 can be greatly prolonged. The front end of the front limiting frame 1 is connected with the front structure through a universal joint, so that the whole structure of the assembly of all the rear detection arms 2 can be guaranteed to float in an all-round and flexible mode, and blocking accidents are avoided.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (8)
1. A piezoelectric ultrasonic flaw detection internal detector for long-distance pipelines is characterized by comprising a front limiting frame and a plurality of rear detecting arms, wherein the front limiting frame is matched with the inner diameter of the pipeline, the rear detecting arms are made of elastic materials, the front limiting frame is provided with a front transparent cover and a plurality of backward-bent connecting claws which are uniformly distributed on the periphery of the front transparent cover, the rear detecting arms are of a bending structure and are provided with a horizontal connecting section and an inclined detecting section, the horizontal connecting section of the rear detecting arms is fixedly connected with the backward-bent connecting claws of the front limiting frame in a one-to-one correspondence manner, all the rear detecting arms have the same inclination, a plurality of thickness measuring probes and a plurality of flaw detection probes are arranged on the inclined detecting section of each rear detecting arm, and the inclined detecting sections of the adjacent two rear detecting arms are connected together through a plurality of V-shaped spring pieces, all the sound field of the flaw detection probe covers the whole circumference of the pipeline, and is adjacent two the sound field of the flaw detection probe is mutually independent, all the sound field of the thickness measurement probe covers the whole circumference of the pipeline, and is adjacent two the sound field of the thickness measurement probe is mutually independent, and is adjacent the sound field of the thickness measurement probe is independent with the sound field of the flaw detection probe.
2. The long pipeline piezoelectric ultrasonic inspection internal detector of claim 1, wherein the plurality of thickness measuring probes are spaced along the length direction of the inclined detection section of the rear detection arm, the plurality of inspection probes are spaced along the length direction of the inclined detection section of the rear detection arm, and the adjacent thickness measuring probes and the inspection probes are spaced.
3. The long distance pipeline piezoelectric ultrasonic testing internal detector of claim 2, wherein the thickness measuring probe and the testing probe on one rear testing arm are arranged on different straight lines.
4. The long pipeline piezoelectric ultrasonic inspection internal detector of claim 3, wherein the plurality of inspection probes are uniformly arranged along the length direction of the inclined inspection section of the rear inspection arm.
5. The long-distance pipeline piezoelectric ultrasonic flaw detection internal detector according to claim 4, wherein the plurality of thickness measuring probes are uniformly arranged along the length direction of the inclined detection section of the rear detection arm.
6. The long transport pipe piezoelectric ultrasonic inspection internal detector of claim 5, wherein the inspection probes and thickness probes on the inclined inspection section of each rear inspection arm are staggered and spaced.
7. The long-distance pipeline piezoelectric ultrasonic flaw detection internal detector according to claim 1, wherein the horizontal connecting section of the rear detection arm is fixedly connected with the backward bending connecting claw of the front limiting frame by a rigid connecting plate.
8. The long distance pipeline piezoelectric ultrasonic inspection internal detector of claim 1, wherein the front limiting frame and the rear detecting arm are made of polyurethane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920762887.6U CN210690483U (en) | 2019-05-25 | 2019-05-25 | Piezoelectric ultrasonic flaw detection internal detector for long-distance pipeline |
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| CN201920762887.6U CN210690483U (en) | 2019-05-25 | 2019-05-25 | Piezoelectric ultrasonic flaw detection internal detector for long-distance pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220972A (en) * | 2019-05-25 | 2019-09-10 | 中海油能源发展股份有限公司 | A kind of long distance pipeline piezoelectric supersonic wave inspection internal detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220972A (en) * | 2019-05-25 | 2019-09-10 | 中海油能源发展股份有限公司 | A kind of long distance pipeline piezoelectric supersonic wave inspection internal detector |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221227 Address after: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee after: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee after: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY Co.,Ltd. Address before: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee before: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee before: CNOOC PETROLEUM TECHNOLOGY DETECTION CO.,LTD. |
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