Petroleum pipeline corrosion detection self-adaptive device

Abstract

The utility model relates to the technical field of pipeline detection, and provides a petroleum pipeline corrosion detection self-adaptive device which comprises a disc base, a plurality of connecting frames are installed on the outer side wall of the disc base, connecting rotating shafts are rotationally connected to the inner side walls of the connecting frames, and one ends of the connecting rotating shafts are fixedly connected with supporting rods. Adjusting assemblies are arranged at the other ends of the connecting rotating shafts, and adjusting mechanisms are arranged on the outer sides of the supporting rods; according to the petroleum pipeline corrosion detection device, the asymmetric array sensor design is adopted, and the sensor arrangement can be optimized according to the local concentration of corrosion in a petroleum pipeline, so that corrosion hot spots are accurately captured, missing detection and misjudgment are avoided, and the accuracy and reliability of detection data are improved; the device provided by the utility model can adapt to pipelines with different diameters and complex working conditions, ensures that the sensor is always in close contact with the inner wall of the pipeline, and improves the stability and reliability of detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline detection technical field, concretely is a kind of petroleum pipeline corrosion detection self-adapting device. BACKGROUND

[0002] As an important facility for oil transportation, the safety and reliability of petroleum pipelines are crucial for the stable operation of the oil industry. However, due to the long-term burial of petroleum pipelines in the ground or placement in complex environments, they are easily corroded by various factors, leading to pipe wall thinning, strength reduction, and even perforation leakage and other safety accidents. Therefore, regular and accurate corrosion detection of petroleum pipelines is an important measure to ensure the safe operation of pipelines.

[0003] Traditional electrochemical detection devices have certain limitations in petroleum pipeline corrosion detection. On the one hand, traditional devices often use symmetric sensor array design, ignoring the local concentration of internal corrosion of petroleum pipelines, resulting in insufficient detection accuracy and difficulty in accurately capturing corrosion hotspots. On the other hand, traditional devices have poor adaptability when facing pipe diameter changes and complex working conditions, making it difficult to meet actual detection needs.

[0004] Therefore, a petroleum pipeline corrosion detection self-adaptive device is proposed by those skilled in the art to solve the problems raised in the background. CONTENT OF THE UTILITY MODEL

[0005] To solve the above technical problems, the utility model provides a petroleum pipeline corrosion detection self-adaptive device, which optimizes sensor array design, enhances the adaptability and stability of the device, and realizes accurate corrosion detection in complex pipeline environments.

[0006] A petroleum pipeline corrosion detection self-adaptive device, comprising a disc base, a plurality of connecting frames are installed on the outer side wall of the disc base, a connecting shaft is rotatably connected to the inner side wall of the connecting frame, a support rod is fixedly connected to one end of the connecting shaft, an adjusting assembly is provided at the other end of the connecting shaft, an adjusting mechanism is provided on the outer side of the support rod, the adjusting mechanism comprises an extension rod, and the extension rod is installed on the side wall of the support rod.

[0007] Two mounting frames are fixedly connected to the top of the extension rod, and an asymmetric sensor is installed on the top of the two mounting frames.

[0008] Preferably, the adjusting assembly comprises a limiting bolt, the limiting bolt is threadedly connected to the inside of one side of the connecting frame, and the end of the connecting shaft away from the support rod is rotatably connected with the limiting bolt.

[0009] Preferably, the asymmetric sensor is installed on the outside of the mounting frame by bolts, and a connecting roller is rotatably connected to the middle part of the extension rod.

[0010] Preferably, the limiting bolt is threadedly connected to the inner wall of the top end of the connecting frame, and the up-down adjustment can adjust the angle of the tail end of the connecting rotating shaft.

[0011] Preferably, the outer side of the extension rod is provided with a bolt, and the bolt on the outer side of the extension rod penetrates into the support rod to limit the extension rod and the support rod together.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model discloses an asymmetric array sensor design, which can optimize sensor arrangement according to the local concentration of corrosion in the oil pipeline, accurately capture corrosion hot spots, avoid missed detection and misjudgment, improve the accuracy and reliability of detection data, and ensure that the sensor always maintains close contact with the inner wall of the pipeline through the design of the telescopic support arm and the wheel body device, thereby improving the stability and reliability of detection. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is one of the three-dimensional structure schematic views of the utility model;

[0015] Figure 2 It is the second three-dimensional structure schematic view of the utility model;

[0016] Figure 3 It is the front view structure schematic view in the utility model;

[0017] Figure 4 It is the structure schematic view of the connecting frame in the utility model; Figure 2

[0018] In the drawing: 1, disc base; 2, connecting frame; 3, connecting rotating shaft; 4, limiting bolt; 5, support rod; 6, extension rod; 7, mounting frame; 8, asymmetric sensor; 9, connecting roller. DETAILED DESCRIPTION

[0019] The embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0020] As shown in the drawings, Figure 1 to the drawings, Figure 4 As shown:

[0021] Example one: according to Figures 1-4 ​As shown, the utility model provides a petroleum pipeline corrosion detection self -adaptation device, including disc base 1, the outside wall of disc base 1 is equipped with a plurality of connecting frame 2, the inner side wall of connecting frame 2 is rotatably connected with connecting shaft 3, one end of connecting shaft 3 is fixedly connected with support rod 5, the other end of connecting shaft 3 is provided with adjusting assembly, the outside of support rod 5 is provided with adjusting mechanism, the adjusting mechanism includes extension rod 6, extension rod 6 is installed in the side wall of support rod 5;

[0022] Two mounting brackets 7 are fixedly connected on both sides of the top of the extension rod 6, two asymmetric sensors 8 are installed on the top of the two mounting brackets 7, the adjusting assembly includes a limiting bolt 4, the limiting bolt 4 is threadedly connected inside one side of the connecting frame 2, the end of the connecting shaft 3 away from the support rod 5 is rotatably connected with the limiting bolt 4, the asymmetric sensor 8 is bolted to the outside of the mounting bracket 7, the middle part of the extension rod 6 is also rotatably connected with a connecting roller 9, the limiting bolt 4 is threadedly connected to the inner wall of the top end of the connecting frame 2, and the up-down adjustment can adjust the angle of the tail end of the connecting shaft 3, the outside of the extension rod 6 is provided with a bolt, the bolt on the outside of the extension rod 6 penetrates into the support rod 5 to limit the extension rod 6 and the support rod 5 together;

[0023] The number of support rods 5 is eight, and they are distributed around the main frame in an asymmetric array. Each support arm is provided with a screw-driven telescopic structure, which can change the length by manual or electric adjustment to adapt to different diameter pipes (diameter range of 50mm to 300mm). This design ensures that the sensor can maintain close contact with the inner wall of the pipe in pipes of different diameters.

[0024] Asymmetric sensor array design:

[0025] Although the traditional symmetric array can achieve full coverage, it ignores the local concentration of corrosion in the petroleum pipeline, so it is necessary to design an "asymmetric sensor array" to distribute more sensors in the lower water phase zone and fewer sensors in the upper oil phase zone to optimize resource allocation and improve detection accuracy.

[0026] Based on computational fluid dynamics (CFD) simulation and electrochemical impedance spectroscopy (EIS) measurement data, the corrosion rate distribution of the pipe cross section can be modeled as an angle-dependent function:

[0027] v(θ)=v max ·e -k|θ-180°|

[0028] In the formula:

[0029] v max is the maximum corrosion rate (typical value 0.25mm / year) at the bottom of the pipe (180°);

[0030] k = 0.02 degree -1 k is the decay coefficient, representing the decay rate of corrosion rate with angle deviating from the bottom;

[0031] θ is the angle of the pipe cross section (0° corresponds to the positive right direction, counterclockwise increasing).

[0032] Conclusion: The corrosion rate reaches the peak at 180°, and the decay rate decreases by 53% for every 30° increase in the deviation angle.

[0033] According to the corrosion rate distribution model, the pipe cross section is divided into three monitoring areas:

[0034] 1. High-density area (150°-210°): corrosion rate v(θ)>0.8v max , sensor interval 30°, 3 main sensors (150°, 180°, 210°) are arranged;

[0035] 2. Transition area (120°-150°, 210°-240°): 0.4v max <v(θ)<0.8v max , sensor interval 60°, 2 auxiliary sensors (120°, 240°) are arranged;

[0036] 3. Low-density area (remaining angles): v(θ)<0.4v max , sensor interval 90°, 3 monitoring points (30°, 90°, 300°) are arranged.

[0037] Suppose the pipe radius R = 150 mm, the sensor angle set θ = [150°, 180°, 210°, 120°, 240°, 30°, 90°, 300°], and its Cartesian coordinates are:

[0038]

[0039] Working principle: When the device needs to be used, first adjust the position of the limiting bolt 4 according to the diameter of the pipe, adjust the connecting shaft 3 by rotating the limiting bolt 4, change the angle of the supporting rod 5, then adjust the position of the outer bolt of the extension rod 6 to adjust the length, install the asymmetric sensor 8 on the top of the mounting bracket 7 according to the required number, detect the inner wall, and walk in the pipe through the connecting roller 9.

[0040] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical, part and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein. The contents not described in detail in the description all belong to the prior art known by the person skilled in the art.

[0041] In the description of the utility model, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0042] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction

[0045] The present application discloses the embodiments in the drawings, only relate to the structure involved in the embodiments of the present application, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other.

[0046] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An adaptive apparatus for detecting corrosion in a petroleum pipeline, characterized by: Including disc base (1), the outer side wall of disc base (1) is equipped with multiple connecting frames (2), the inner side wall of connecting frame (2) is rotatably connected with connecting shaft (3), one end of connecting shaft (3) is fixedly connected with support rod (5), the other end of connecting shaft (3) is provided with adjusting assembly, the outer side of support rod (5) is provided with adjusting mechanism, the adjusting mechanism includes extension rod (6), the extension rod (6) is installed on the side wall of support rod (5); Two mounting frames (7) are fixedly connected on the both sides of the top of extension rod (6), and two asymmetric sensors (8) are installed on the top of two mounting frames (7).

2. An adaptive apparatus for detecting corrosion in a petroleum pipeline as defined in claim 1, wherein: The adjusting assembly includes a limiting bolt (4), the limiting bolt (4) is threadedly connected to the inside of one side of the connecting frame (2), and the end of the connecting shaft (3) away from the support rod (5) is rotatably connected with the limiting bolt (4).

3. An adaptive apparatus for detecting corrosion in a petroleum pipeline as defined in claim 1, wherein: The asymmetric sensor (8) is mounted on the outside of the mounting frame (7) by bolts, and a connecting roller (9) is rotatably connected to the middle part of the extension rod (6).

4. An adaptive apparatus for detecting corrosion in a petroleum pipeline as defined in claim 2, wherein: The limiting bolt (4) is threadedly connected to the inner wall of the top end of the connecting frame (2), and the up-down adjustment can adjust the angle of the tail end of the connecting shaft (3).

5. The petroleum pipeline corrosion detection self-adapting device of claim 1, wherein: The outer side of the extension rod (6) is provided with a bolt, the bolt on the outer side of the extension rod (6) penetrates into the support rod (5) to limit the extension rod (6) and the support rod (5) together.

6. An adaptive apparatus for detecting corrosion in a petroleum pipeline as defined in claim 1, wherein: The position connected with the limiting bolt (4) in the connecting frame (2) is provided with a long slot, so that the limiting bolt (4) can swing left and right for adjustment.

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