Pipeline internal detection system and method based on particle ray detection imaging

Abstract

The invention relates to a pipeline internal detection system and method based on particle ray detection imaging, and the system comprises a ray source and a plurality of detectors which are circumferentially and uniformly distributed around the ray source at intervals. The plurality of particle scattering rays are formed after a plurality of particle incident rays emitted by the ray source are scattered by the wall of the to-be-detected pipeline during detection. The method has the beneficial effects that the design is reasonable, rapid detection of pipeline wall defects, especially tiny defects, can be realized, the pipeline internal detection precision and defect adaptability are improved, and the technical problem of internal detection of tiny complex defects of the pipeline is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline wall defect detection, and in particular to a pipeline in-detection system and method based on particle ray detection imaging. Background Art

[0002] Oil and gas pipelines are important basic equipment in the oil and gas transportation system. The construction and operation of pipelines are of great significance to the transportation of oil and gas resources in my country. Pipeline transportation is an important part of my country's transportation system and plays an important role in the national economy and social development.

[0003] At present, the mainstream pipeline internal inspection methods at home and abroad include three-axis high-definition magnetic flux leakage + geometry, ultrasonic and other technologies, which can detect and quantify the volumetric and geometric deformation defects of the pipe body. However, affected by factors such as the detection mechanism and the operating conditions of the internal inspection equipment, the current various internal inspection technologies have a low detection rate for complex defects such as small defects in pipeline girth welds and planar cracks.

[0004] Therefore, it is urgent to explore and develop new sensing and detection technologies, break through traditional detection methods such as sound, light, magnetism, and electricity, and achieve high-quality detection of pipeline girth weld defects.

[0005] Conventional transmission-type radiographic detection imaging technology has been widely used in non-destructive testing, security inspection and other fields. It can be applied to the detection of metal loss defects and has good detection capabilities for defects such as girth weld cracks, pores, slag inclusions, etc. However, traditional transmission-type radiographic imaging technology requires the ray emission source and imaging system to be placed on both sides of the pipeline, and requires a long exposure time. This detection method is not suitable for integration into an internal detector for pipeline inspection.

[0006] The ray detection technology based on scattered imaging is another detection method of ray detection. It uses the scattered rays for imaging and has the advantages of fast detection speed and non-contact. The system structure can be mounted on the detector inside the pipeline.

[0007] In order to solve the technical problems of internal detection of tiny and complex defects in pipelines, this paper proposes a pipeline internal detection method based on particle ray detection imaging by utilizing the advantages of scattered imaging particle ray detection, which will ultimately improve the detection accuracy and defect adaptability of the internal detection system. Summary of the invention

[0008] The present invention provides a pipeline in-detection system and method based on particle ray detection imaging, aiming to solve the problems in the prior art.

[0009] The technical solution of the present invention to solve the above technical problems is as follows:

[0010] A pipeline detection system based on particle ray detection imaging includes a ray source and multiple detectors, wherein the multiple detectors are evenly distributed around the ray source in a circumferential manner and are respectively used to receive multiple particle scattered rays formed by multiple particle incident rays emitted by the ray source and scattered by the wall of the pipeline to be detected during detection.

[0011] The beneficial effects of the present invention are as follows: during the detection process, the entire device is placed in the pipeline to be detected, and the fluid transported in the pipeline is used as the power for the entire device to move in the pipeline;

[0012] When the whole equipment is moving, the ray source emits a number of particle incident rays. After reaching the wall of the pipeline to be tested, the particle incident rays are scattered to form a number of particle scattered rays. Multiple detectors receive the particle scattered rays respectively. The particle scattered rays received by the multiple detectors are used to analyze and determine whether there are defects on the pipeline wall.

[0013] The present invention is reasonably designed and can realize rapid detection of pipeline wall defects, especially tiny defects, improves the detection accuracy and defect adaptability inside the pipeline, and solves the technical difficulties of internal detection of tiny and complex defects in the pipeline.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, it also includes a mounting frame, and the ray source and the plurality of detectors are respectively mounted on the mounting frame.

[0016] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and integration of multiple detectors into one by using a mounting frame, which is convenient to use.

[0017] Furthermore, the plurality of detectors are respectively mounted on the mounting frame via elastic members.

[0018] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. Multiple detectors respectively use elastic parts to adapt to the size changes of the pipeline wall. When there is a protrusion on the inner wall of the pipeline, the corresponding detector can be adaptively contracted to facilitate detection operations.

[0019] Furthermore, the plurality of detectors are respectively in arc-shaped structures.

[0020] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the curvature of multiple detectors is adapted to the curvature of the inner wall of the pipeline, so as to better receive the rays scattered by the pipeline wall and greatly improve the detection accuracy.

[0021] Furthermore, it also includes a protective shielding body, which is fixedly mounted on the mounting frame and covers the radiation source; the protective shielding body is evenly spaced with a plurality of slits for the radiation emitted by the radiation source to pass through.

[0022] The beneficial effects of adopting the above further scheme are simple structure, reasonable design, and the use of the protective shielding body to shield rays, avoid radiation generation, and ensure the personal safety of operators.

[0023] Furthermore, the protective shielding body is a closed cylindrical structure, and the plurality of slits are evenly spaced and distributed along the circumference of the protective shielding body.

[0024] The beneficial effect of adopting the above further solution is that the shape of the protective shielding body is reasonably designed to adapt to the distribution of multiple detectors, thereby ensuring the shielding effect.

[0025] Furthermore, it also includes an electronic package, and the plurality of detectors are respectively connected to the electronic package via signal cables.

[0026] The beneficial effects of adopting the above further scheme are simple structure, reasonable design, using electronic packages to power various electronic components, and simultaneously receiving and storing signals collected by multiple detectors; the electronic package sends the processed signal to a data analysis computer, and the data analysis computer analyzes the intensity of the scattered rays to determine whether there are defects in the pipeline wall; theoretically, when there are no defects on the inner wall of the pipeline, the intensity of all rays remains consistent, and if there are defects on the pipeline wall, the ray intensity is relatively weak, indicating that there is a defect here.

[0027] Furthermore, it also includes a data analysis computer, and the electronic package is communicatively connected to the data analysis computer.

[0028] The beneficial effect of adopting the above further scheme is that the data analysis computer analyzes the intensity of the scattered rays to determine whether there are defects in the pipeline wall; theoretically, when there are no defects on the inner wall of the pipeline, the intensity of all rays remains consistent. If there are defects on the pipeline wall, the ray intensity is relatively weak, indicating that there is a defect here.

[0029] Furthermore, the ray source is a gamma ray source.

[0030] The beneficial effect of adopting the above further scheme is that the advantages of the gamma ray source are mainly reflected in its high energy, strong penetration, non-invasive treatment, precise positioning, efficient operation and low cost.

[0031] The present invention also relates to a pipeline in-detection method based on particle ray detection imaging, which is implemented by using the above-mentioned pipeline in-detection system based on particle ray detection imaging, and includes the following specific steps:

[0032] The ray source emits a number of particle incident rays, which are scattered to form a number of particle scattered rays after reaching the inner wall of the pipeline to be tested, and a plurality of detectors receive the number of particle scattered rays respectively.

[0033] The beneficial effect of adopting the above further scheme is that the present invention also provides a pipeline in-detection method based on particle ray detection imaging. The detection method is reasonably designed and can realize rapid detection of pipeline wall defects, especially tiny defects, thereby improving the in-pipeline detection accuracy and defect adaptability, and solving the technical difficulties of in-pipeline detection of tiny and complex defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a radial cross-sectional schematic diagram of the present invention;

[0035] Figure 2 It is a schematic diagram of an axial cross section of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1. Pipeline wall to be tested; 2. Detector; 3. Radiation source; 4. Protective shield; 5. Particle incident radiation; 6. Particle scattered radiation; 7. Electronic package; 8. Signal cable. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0042] Example 1

[0043] like Figure 1 and Figure 2 As shown, this embodiment provides an in-pipeline detection system based on particle beam detection imaging, including a ray source 3 and a plurality of detectors 2, wherein the plurality of detectors 2 are uniformly distributed around the ray source 3 in a circular manner, and are respectively used for receiving a plurality of particle incident rays 5 emitted by the ray source 3 during detection, and a plurality of particle scattered rays 6 formed after being scattered by the wall 1 of the pipeline to be detected.

[0044] During the inspection process, the entire device is placed in the pipeline to be inspected, and the fluid transported in the pipeline is used as the power for the entire device to move in the pipeline;

[0045] When the whole equipment is moving, the ray source 3 emits a number of particle incident rays 5. After reaching the wall of the pipeline to be tested, the particle incident rays 5 are scattered to form a number of particle scattered rays 6. The multiple detectors 2 receive the particle scattered rays 6 respectively. The particle scattered rays 6 received by the multiple detectors 2 are used to analyze and determine whether there are defects on the pipeline wall.

[0046] It should be noted that the above-mentioned multiple detectors 2 respectively adopt existing technologies, and their specific structures and principles are not described in detail here.

[0047] This embodiment is reasonably designed and can realize rapid detection of pipeline wall defects, especially tiny defects, improve the detection accuracy and defect adaptability inside the pipeline, and solve the technical difficulties of internal detection of tiny and complex defects in the pipeline.

[0048] Example 2

[0049] On the basis of Embodiment 1, this embodiment further includes a mounting frame, and the ray source 3 and the plurality of detectors 2 are respectively mounted on the mounting frame.

[0050] This solution has a simple structure and a reasonable design, and integrates a plurality of detectors 2 into one by using a mounting frame, which is convenient to use.

[0051] Example 3

[0052] On the basis of Embodiment 2, in this embodiment, a plurality of detectors 2 are respectively mounted on the mounting frame via elastic members.

[0053] This solution has a simple structure and a reasonable design. Multiple detectors 2 use elastic parts to adapt to changes in the pipeline wall. When there is a bulge on the inner wall of the pipeline, the corresponding detector 2 can be adaptively contracted to perform detection operations.

[0054] Example 4

[0055] On the basis of any one of Embodiments 2 to 3, in this embodiment, the plurality of detectors 2 are respectively in an arc-shaped structure.

[0056] This solution has a simple structure and a reasonable design. The curvature of the multiple detectors 2 is adapted to the curvature of the inner wall of the pipeline, so as to better receive the rays scattered by the pipeline wall and greatly improve the detection accuracy.

[0057] Example 5

[0058] Based on any one of Examples 2 to 3, this embodiment further includes a protective shielding body 4, which is fixedly mounted on the mounting frame and covers the outside of the radiation source 3; the protective shielding body 4 is evenly spaced with a plurality of slits for the rays emitted by the radiation source 3 to pass through.

[0059] The solution has a simple structure and a reasonable design. The protective shielding body 4 can shield the rays, avoid the generation of radiation, and ensure the personal safety of the operators.

[0060] Preferably, in this embodiment, the protective shield 4 directs the gamma rays, reduces the gamma ray radiation dose, protects the operator, and reserves an annular gap for the rays to be emitted. It is required to meet relevant domestic and international standards and not produce radioactive residues.

[0061] The outer layer of the protective shielding body 4 is a titanium alloy protective shell with a built-in positioning system and a safety interlocking mechanism. The structure of this part adopts the existing technology.

[0062] Example 6

[0063] On the basis of Embodiment 4, in this embodiment, the protective shielding body 4 is a closed cylindrical structure, and the plurality of slits are evenly spaced and distributed along the circumference of the protective shielding body 4 .

[0064] The shape of the protective shielding body 4 is reasonably designed to be adapted to the distribution of the plurality of detectors 2, thereby ensuring the shielding effect.

[0065] Example 7

[0066] On the basis of the above embodiments, this embodiment further includes an electronic package 7 , and the plurality of detectors 2 are connected to the electronic package 7 via signal cables 8 , respectively.

[0067] The scheme has a simple structure and a reasonable design. The electronic package 7 is used to power each electronic component, and at the same time, the signals collected by multiple detectors 2 are received and stored. The electronic package 7 sends the processed signal to the data analysis computer, and the data analysis computer analyzes the intensity of the scattered rays to determine whether there are defects in the pipeline wall. In theory, when there are no defects on the inner wall of the pipeline, the intensity of all rays remains consistent. If there are defects on the pipeline wall, the ray intensity is relatively weak, indicating that there are defects here.

[0068] Multiple detectors 2 form a detector array, which is used to receive gamma rays and convert them into electrical signals, and transmit the data to the electronic package through the signal cable. The entire circumference of the inner side of the pipe wall is covered with the detector array to form a ring, and the optical path design of the push-scan method is adopted. Equal to the particle separation value of the pipe wall, each array has a high resolution and can achieve very high detection accuracy.

[0069] The electronic package 7 receives data from the detector array ring and stores it in an internal large-capacity memory. After the detection operation is completed, the data is downloaded and analyzed.

[0070] Example 8

[0071] Based on Example 7, this embodiment further includes a data analysis computer, and the electronic package 7 is communicatively connected to the processor.

[0072] The data analysis computer (using existing technology) analyzes the intensity of the scattered rays to determine whether there are defects in the pipeline wall; theoretically, when there are no defects on the inner wall of the pipeline, the intensity of all rays remains consistent. If there are defects on the pipeline wall, the ray intensity is relatively weak, indicating that there is a defect here.

[0073] Based on the above scheme, the electronic package 7 includes a power supply and a memory, each detector 2 is connected to the power supply through a signal cable 8, the power supply is connected to the memory through the signal cable 8, and the memory is wirelessly connected to the data analysis computer.

[0074] Example 9

[0075] On the basis of the above embodiments, in this embodiment, the ray source 3 is a gamma ray source.

[0076] The advantages of gamma-ray sources are mainly reflected in their high energy, strong penetration, non-invasive treatment, precise positioning, efficient operation and low cost.

[0077] The gamma ray source is a radioactive element with a half-life of about 10 years, and a low-activity nuclide is selected from a safety perspective.

[0078] As a detection excitation source, the gamma-ray source does not need to be powered itself, but only needs to power the detector array and the electronic package, which reduces the number of batteries and has the characteristics of low power consumption and light weight.

[0079] Example 10

[0080] On the basis of the above embodiments, this embodiment further provides a pipeline detection method based on particle ray detection imaging, which is implemented by the pipeline detection system based on particle ray detection imaging as described above, and includes the following specific steps:

[0081] The ray source 3 emits a plurality of particle incident rays 5 , which are scattered to form a plurality of particle scattered rays 6 after reaching the wall of the pipeline to be measured. The plurality of detectors 2 receive the plurality of particle scattered rays 6 respectively.

[0082] This embodiment also provides a method for in-pipeline detection based on particle ray detection imaging. The detection method is reasonably designed and can realize rapid detection of pipeline wall defects, especially tiny defects, thereby improving the in-pipeline detection accuracy and defect adaptability, and solving the technical difficulties in in-pipeline detection of tiny and complex defects.

[0083] The detection principle of the pipeline wall detection method provided by the present invention is as follows:

[0084] The ray source 3 emits a plurality of particle incident rays 5, which are scattered after reaching the wall of the pipeline to be tested to form a plurality of particle scattered rays 6, and the plurality of detectors 2 receive the plurality of particle scattered rays 6 respectively;

[0085] At the same time, the electronic package 7 is used to power each electronic component and receive and store the signals collected by multiple detectors 2; the electronic package 7 sends the processed signal to the data analysis computer, and the data analysis computer analyzes the intensity of the scattered rays to determine whether there are defects in the pipeline wall; theoretically, when there are no defects on the inner wall of the pipeline, the intensity of all rays remains consistent. If there are defects on the pipeline wall, the ray intensity is relatively weak, indicating that there is a defect here.

[0086] The present invention provides a new pipeline internal detection method, which solves the problem of low detection rate of current mainstream internal detection methods such as magnetic leakage and ultrasonic eddy current at home and abroad for complex defects such as tiny defects in pipeline girth welds and planar cracks, and improves the technical level in the field of internal detection.

[0087] The purpose of the present invention is to provide a pipeline internal detection method based on particle ray detection imaging, to improve the internal detection accuracy and defect adaptability, and to solve the technical difficulties in the internal detection of small and complex defects in pipelines.

[0088] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected, and the control circuits between the components are the existing technology.

[0089] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0090] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline inspection system based on particle ray detection imaging, characterized in that: The invention comprises a ray source (3) and a plurality of detectors (2), wherein the plurality of detectors (2) are evenly distributed around the ray source (3) in a circumferential manner and are respectively used to receive, during detection, a plurality of particle scattered rays (6) formed after a plurality of particle incident rays (5) emitted by the ray source (3) are scattered by a wall (1) of a pipeline to be detected.

2. The in-pipeline detection system based on particle ray detection imaging according to claim 1 is characterized in that: It also comprises a mounting frame, on which the ray source (3) and the plurality of detectors (2) are respectively mounted.

3. The in-pipeline detection system based on particle ray detection imaging according to claim 2 is characterized in that: The plurality of detectors (2) are respectively mounted on the mounting frame via elastic members.

4. The in-pipeline detection system based on particle ray detection imaging according to claim 2, characterized in that: The plurality of detectors (2) are respectively in an arc-shaped structure.

5. The in-pipeline detection system based on particle ray detection imaging according to claim 2, characterized in that: It also comprises a protective shielding body (4), which is fixedly mounted on the mounting frame and covers the outside of the ray source (3); the protective shielding body (4) is evenly spaced and provided with a plurality of slits for the rays emitted by the ray source (3) to pass through.

6. The in-pipeline detection system based on particle ray detection imaging according to claim 5, characterized in that: The protective shielding body (4) is a closed cylindrical structure, and a plurality of slits are evenly spaced and distributed along the circumference of the protective shielding body (4).

7. The in-pipeline detection system based on particle beam detection imaging according to any one of claims 1 to 5, characterized in that: It also comprises an electronic package (7), and the plurality of detectors (2) are respectively connected to the electronic package (7) via signal cables (8).

8. The in-pipeline detection system based on particle ray detection imaging according to claim 7, characterized in that: It also includes a data analysis computer, and the electronic package (7) is communicatively connected to the data analysis computer.

9. The in-pipeline detection system based on particle beam detection imaging according to any one of claims 1 to 5, characterized in that: The ray source (3) is a gamma ray source.

10. A pipeline detection method based on particle ray detection imaging, characterized in that: The in-pipeline detection system based on particle ray detection imaging as described in any one of claims 1 to 9 is implemented, comprising the following specific steps: The ray source (3) emits a plurality of particle incident rays (5), which are scattered upon reaching the wall (1) of the pipeline to be measured to form a plurality of particle scattered rays (6), and a plurality of detectors (2) respectively receive the plurality of particle scattered rays (6).

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