Composite sensor arm for pipeline detection

Abstract

The utility model relates to a composite sensor arm for pipeline detection, belongs to the technical field of pipeline detection, and solves the problem that eddy current internal detection and geometric deformation internal detection cannot be simultaneously completed through one-time detection in the existing pipeline detection. The device comprises a fixing part, the first swing arm is hinged to the fixed part; the electromagnetic eddy current sensor is hinged to the other end of the first swing arm; the geometric deformation detection sensor assembly comprises a geometric deformation detection sensor, a second swing arm with one end hinged to the geometric deformation detection sensor, and a connecting rod; the two ends of the connecting rod are hinged to the first swing arm and the second swing arm respectively. According to the utility model, the electromagnetic eddy current sensor and the geometric deformation detection sensor are arranged on the sensor arm, so that eddy current internal detection and geometric deformation internal detection can be completed at the same time in one-time detection when pipeline internal detection is carried out, and the detection cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to a composite sensor arm for pipeline inspection. Background Technology

[0002] Pipelines have long been widely used as the most economical and efficient way to transport oil and natural gas. In existing technologies, when eddy current testing and geometric deformation testing of the pipeline's inner wall are required, the pipeline needs to be entered twice, with an eddy current pipeline detector and a geometric deformation pipeline detector placed separately to complete the eddy current testing and geometric deformation testing.

[0003] Therefore, a composite sensor arm for pipeline inspection is designed, which can simultaneously perform eddy current detection and geometric deformation detection of the pipeline by running once inside the pipeline. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a composite sensor arm for pipeline inspection, in order to solve the technical problem that existing pipeline inspection methods cannot simultaneously perform eddy current detection and geometric deformation detection.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A composite sensor arm for pipeline inspection, comprising:

[0007] Fixing part;

[0008] The first swing arm has one end hinged to the fixed part.

[0009] An electromagnetic eddy current sensor is hinged to the other end of the first swing arm;

[0010] A geometric deformation detection sensor assembly includes a geometric deformation detection sensor disposed on the fixed part, a second swing arm with one end hinged to the geometric deformation detection sensor, and a connecting rod; the two ends of the connecting rod are respectively hinged to the other end of the first swing arm and the other end of the second swing arm.

[0011] The second swing arm is arranged parallel to the first swing arm; the geometric deformation detection sensor is used to detect the swing angle of the second swing arm in the pipe.

[0012] Furthermore, it also includes a first rotating shaft;

[0013] The fixing part includes a connecting end, which is hinged to one end of the first swing arm and to the first rotating shaft.

[0014] Furthermore, it also includes a second rotating shaft;

[0015] The other end of the connecting rod and the other end of the second swing arm are hinged to the second rotating shaft.

[0016] Furthermore, it also includes a spring, one end of which is fixed to the first rotating shaft, and the other end of which is fixed to the second rotating shaft.

[0017] Furthermore, it also includes a third rotating shaft;

[0018] The other end of the first swing arm and one end of the connecting rod are hinged to the third rotating shaft.

[0019] Furthermore, the electromagnetic eddy current sensor includes a housing and an electromagnetic eddy current detection element disposed on the upper surface of the housing.

[0020] Furthermore, it also includes a connecting part, one end of which is hinged to the third rotating shaft, and the other end of which is fixed to the housing.

[0021] Furthermore, the other end of the connecting part has a C-shaped opening structure; the housing is fixed to the C-shaped opening structure.

[0022] Furthermore, the fixing part also includes a fixing frame and a fixing plate for fixing the geometric deformation detection sensor.

[0023] Furthermore, the fixing plate is provided with fixing holes.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0025] (1) The composite sensor arm for pipeline inspection of this utility model includes a fixed part, a first swing arm, an electromagnetic eddy current sensor and a geometric deformation detection sensor assembly disposed at the other end of the first swing arm; when performing pipeline inspection, the electromagnetic eddy current sensor is attached to the inner wall of the pipeline to detect whether there are defects in the pipeline wall, while the second swing arm of the geometric deformation detection sensor assembly is arranged parallel to the first swing arm. When there is deformation in the pipeline, the first swing arm swings at a certain angle with the deformation, thereby driving the second swing arm to swing at the corresponding angle. The geometric deformation detection sensor detects the swing angle of the second swing arm, so as to achieve the purpose of simultaneously completing the pipeline geometric deformation detection and the electromagnetic eddy current detection of pipeline defects in one inspection.

[0026] (2) The composite sensor arm for pipeline inspection of this utility model can be selected with appropriate lengths for the first swing arm and the second swing arm according to the actual application, shortening the length of the composite sensor arm, which is suitable for assembling a small pipeline detector and then inspecting small-diameter pipelines.

[0027] (3) The composite sensor arm for pipeline inspection of this utility model has a simple structure and low cost. Each component adopts a rigid structure and has corrosion-resistant mechanical properties, which can overcome the harsh working conditions inside the pipeline.

[0028] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0030] Figure 1 This is a schematic diagram of the first structure of a composite small-diameter pipe internal detector according to a specific embodiment;

[0031] Figure 2 This is a schematic diagram of the second structure of the composite small-diameter pipe detector in a specific embodiment.

[0032] Figure label:

[0033] 1-Fixing part; 11-Fixing frame; 12-Fixing plate; 2-First swing arm; 3-Electromagnetic eddy current sensor; 31-Housing; 32-Electromagnetic eddy current detection component; 4-Geometric deformation detection sensor assembly; 41-Geometric deformation detection sensor; 42-Second swing arm; 43-Connecting rod; 5-First rotating shaft; 6-Second rotating shaft; 7-Spring; 8-Third rotating shaft; 9-Connecting part. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0035] A specific embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, a composite sensor arm for pipeline inspection is disclosed, comprising:

[0036] Fixing part 1;

[0037] The first swing arm 2 has one end hinged to the fixed part 1.

[0038] An electromagnetic eddy current sensor 3 is hinged to the other end of the first swing arm 2;

[0039] The geometric deformation detection sensor assembly 4 includes a geometric deformation detection sensor 41 disposed on the fixed part 1, a second swing arm 42 with one end hinged to the geometric deformation detection sensor 41, and a connecting rod 43; the two ends of the connecting rod 43 are respectively hinged to the other end of the first swing arm 2 and the other end of the second swing arm 42.

[0040] The second swing arm 42 is arranged parallel to the first swing arm 2; the geometric deformation detection sensor 41 is used to detect the swing angle of the second swing arm 42 in the pipe.

[0041] In this embodiment, the composite sensor arm for pipeline inspection includes a fixed part 1, a first swing arm 2, an electromagnetic eddy current sensor 3 and a geometric deformation detection sensor assembly 4 disposed at the other end of the first swing arm 2. During pipeline inspection, the electromagnetic eddy current sensor 3 adheres to the inner wall of the pipeline. When the primary coil within the electromagnetic eddy current sensor 3 is energized, eddy currents are generated on the pipeline surface under electromagnetic induction. The induced magnetic field generated by these eddy currents acts on the secondary coil, inducing a voltage. The magnitude of the induced voltage is related to the size and shape of the defect. When a defect exists in the pipe wall, the magnetic flux through the secondary coil changes, causing a change in the induced voltage. Based on the induced voltage spectrum, pipeline defect data can be obtained quickly and accurately. Meanwhile, the second swing arm 42, the first swing arm 2, and the connecting rod 43 of the geometric deformation detection sensor assembly 4 are arranged in a parallelogram shape. When deformation occurs in the pipeline, the first swing arm 2 senses the downward pressure or expansion of the pipeline and swings at a certain angle, causing the second swing arm 42 to swing at a corresponding angle. The geometric deformation detection sensor 41 detects the swing angle of the second swing arm 42 and records the change in the angle between the second swing arm 42 and the pipeline axis, thereby obtaining the distance between the probe arm and the pipe wall when it is pressed down or expanded, and calculating the magnitude of the deformation. This achieves the goal of simultaneously completing pipeline geometric deformation detection and pipeline defect electromagnetic eddy current detection in one inspection.

[0042] The embodiment also includes a first rotating shaft 5;

[0043] The fixing part 1 includes a connecting end, which is hinged to one end of the first swing arm 2 and to the first rotating shaft 5.

[0044] The embodiment also includes a second rotating shaft 6;

[0045] The other end of the connecting rod 43 and the other end of the second swing arm 42 are hinged to the second rotating shaft 6.

[0046] In this embodiment, a spring 7 is also included, one end of which is fixed to the first rotating shaft 5, and the other end of which is fixed to the second rotating shaft 6.

[0047] The embodiment also includes a third rotating shaft 8;

[0048] The other end of the first swing arm 2 and one end of the connecting rod 43 are hinged to the third rotating shaft 8.

[0049] Using the first rotating shaft 5, the second rotating shaft 6, and the third rotating shaft 8, the first swing arm 2, the second swing arm 42, and the connecting arm are hinged to form three sides of a parallelogram. Springs 7 are set on the diagonals of this parallelogram, namely the first rotating shaft 5 and the second rotating shaft 6, to form a rotatable elastic mechanical swing arm. The shape of the inner wall of the pipe directly affects the angle between the first swing arm 2 and the pipe axis. When the shape of the pipe changes, the other end of the first swing arm 2 swings, which in turn drives the second swing arm 42 to swing. The geometric deformation detection sensor 41 detects the changes in the second swing arm 42 and records the changes in the angle between the second swing arm 42 and the pipe axis, thereby obtaining the distance between the second swing arm 42 and the pipe wall when it is pressed down or expanded, and then calculating the magnitude of the deformation.

[0050] In this embodiment, the electromagnetic eddy current sensor 3 includes a housing 31 and an electromagnetic eddy current detection element 32 disposed on the upper surface of the housing 31.

[0051] The housing 31 adopts a cuboid structure, and the electromagnetic eddy current detection element 32 is set on the upper end surface of the housing 31 that contacts the inner wall of the pipe, so as to better sense the change of magnetic flux.

[0052] In this embodiment, a connecting part 9 is also included, one end of which is hinged to the third rotating shaft 8, and the other end of which is fixed to the housing 31.

[0053] In this embodiment, the other end of the connecting part 9 has a C-shaped opening structure; the housing 31 is fixed to the C-shaped opening structure.

[0054] When detecting pipes of different sizes, the connecting part 9 can rotate appropriately with the first swing arm 2, and the housing 31 of the electromagnetic eddy current sensor 3 can match different pipe sizes. The housing 31 is fixed to the C-shaped opening structure of the connecting part 9 by bolts, and the housing 31 is firmly connected to the connecting part 9.

[0055] In this embodiment, the fixing part 1 further includes a fixing frame 11 and a fixing plate 12 for fixing the geometric deformation detection sensor 41.

[0056] In this embodiment, the fixing plate 12 has fixing holes. The composite sensor arm for pipeline detection is fixed to the pipeline detector through the fixing holes.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite sensor arm for pipeline inspection, characterized by, The utility model relates to a pipeline internal wall defect detection device, including: Fixed part (1); First swing arm (2), one end is hinged to fixed part (1), Electromagnetic eddy current sensor (3) is hinged to the other end of first swing arm (2);Electromagnetic eddy current sensor (3) is attached to the inner wall of pipeline and thus detects whether the inner wall of pipeline has defects;The electromagnetic eddy current sensor (3) includes a housing (31); Geometric deformation detection sensor assembly (4) includes geometric deformation detection sensor (41) arranged in fixed part (1), second swing arm (42) with one end hinged to geometric deformation detection sensor (41) and connecting rod (43);Both ends of connecting rod (43) are hinged to the other end of first swing arm (2) and the other end of second swing arm (42) respectively; Third rotation axis (8), the other end of first swing arm (2) and one end of connecting rod (43) are hinged to third rotation axis (8); Connecting part (9), one end of connecting part (9) is hinged to third rotation axis (8), and the other end of connecting part (9) fixes housing (31);The other end of connecting part (9) is C-shaped opening structure;The housing (31) is fixed in the C-shaped opening structure; Wherein, the second swing arm (42), first swing arm (2) and connecting rod (43) are arranged in parallelogram, and spring (7) is arranged on the diagonal line of the parallelogram to form a rotatable elastic mechanical swing arm;The geometric deformation detection sensor (41) is used for detecting the swing angle of second swing arm (42) in pipeline.

2. The composite sensor arm for pipeline inspection according to claim 1, wherein, Also including first rotation axis (5); The fixed part (1) includes a connecting end, and one end of the connecting end and the first swing arm (2) is hinged to the first rotation axis (5).

3. The composite sensor arm for pipeline inspection according to claim 2, wherein, Also including second rotation axis (6); The other end of connecting rod (43) and the other end of second swing arm (42) are hinged to second rotation axis (6).

4. The composite sensor arm for pipeline inspection according to claim 3, wherein, Also including spring (7), one end of spring (7) is fixed to first rotation axis (5), and the other end of spring (7) is fixed to second rotation axis (6).

5. The composite sensor arm for pipeline inspection of claim 1, wherein, The electromagnetic eddy current sensor (3) includes a housing (31) and an electromagnetic eddy current detection member (32) arranged on the upper end face of the housing (31).

6. The composite sensor arm for pipeline inspection of claim 1, wherein, The fixed part (1) further includes a fixing frame (11) and a fixing plate (12) for fixing the geometric deformation detection sensor (41).

7. The composite sensor arm for pipeline inspection according to claim 6, wherein, A fixing hole is formed in the fixing plate (12).

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