Portable weak magnetic detection system for oil and gas pipeline

Abstract

The invention discloses a portable oil and gas pipeline weak magnetic detection system, which comprises a portable main body frame for bearing all parts of the whole detection device; the weak magnetic detection module is arranged on the portable main body frame and is used for performing weak magnetic detection on the oil and gas pipeline; the data acquisition and processing module is connected with the weak magnetic detection module and is used for acquiring data detected by the weak magnetic detection module; the display module is connected with the data acquisition and processing module; and the power supply module is used for providing electric energy required by work for the weak magnetic detection module, the data acquisition and processing module and the display module. The portable main body frame is arranged to serve as a basic supporting structure of the whole detection device, can bear all parts and is convenient to carry to different detection sites, the flexibility and coverage range of detection work are greatly improved, the detection limitation caused by large size and difficult movement of traditional large detection equipment is overcome, and the detection efficiency is improved. And the pipeline can be timely and effectively detected in various environments.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas pipeline detection and relates to a portable oil and gas pipeline weak magnetic detection system. BACKGROUND

[0002] As a key infrastructure in the field of energy transportation, oil and gas pipelines bear the heavy responsibility of safely and efficiently transporting important energy such as oil and natural gas to various use areas. The safe and stable operation of oil and gas pipelines is of great importance to the protection of national energy security and the maintenance of normal social and economic operation. During the long-term operation of oil and gas pipelines, they are inevitably subjected to corrosion due to the complex and changeable natural environment and working conditions. Chemical substances and water in the soil, as well as corrosive components in the transported medium, gradually erode the pipeline material, causing the wall thickness to thin and the strength to decrease. At the same time, stress concentration may occur during the installation and operation of the pipeline due to uneven stress, resulting in high stress levels in local areas, which accelerates the damage and destruction of the pipeline. Various defects may gradually appear in the pipeline during operation, and once the defects develop to a certain extent, oil and gas leakage may occur, which not only causes great waste of energy and economic losses, but also may lead to disastrous accidents such as fire and explosion, posing a serious threat to the surrounding environment and the safety of people's lives and property.

[0003] In order to timely detect pipeline defects and avoid accidents, traditional detection methods commonly used include magnetic flux leakage detection and ultrasonic detection. Magnetic flux leakage detection mainly utilizes the fact that when a ferromagnetic material is magnetized, a magnetic flux leakage field is generated at the defect, and the defect is identified by detecting the change of the magnetic flux leakage field. Ultrasonic detection is based on the characteristics of reflection and refraction of ultrasonic waves when they encounter defects in materials, and the position and size of the defects are determined by analyzing the reflected wave information. However, these traditional detection methods have obvious limitations. The detection equipment is usually bulky, requiring large auxiliary devices and complex operation equipment, which brings great difficulties to the transportation and on-site arrangement of the equipment. Moreover, the detection efficiency is low, and the detection process takes a long time, making it difficult to meet the demand for rapid detection of long-distance pipelines.

[0004] In summary, the existing oil and gas pipeline detection technology has many shortcomings, and there is an urgent need for a detection device that can adapt to complex outdoor environments and is easy to carry and operate to meet the actual needs of oil and gas pipeline safety detection. SUMMARY

[0005] The purpose of the present application is to solve the problem of the detection equipment being not convenient to carry and the operation being complex in the prior art, and to provide a portable oil and gas pipeline weak magnetic detection system.

[0006] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application: A portable oil and gas pipeline weak magnetic detection system comprises: A portable main frame carries all components of the entire detection device, and facilitates carrying to different detection sites; A weak magnetic detection module is arranged on the portable main frame, and performs weak magnetic detection on the oil and gas pipeline to identify pipeline defects by detecting changes in the weak magnetic field generated by the pipeline defects. A data acquisition and processing module is connected with the weak magnetic detection module, acquires data detected by the weak magnetic detection module, and determines the position and characteristic information of the pipeline defects. A display module is connected with the data acquisition and processing module, and is used to display pipeline defect information obtained by the data acquisition and processing module. A power module provides power required for the weak magnetic detection module, the data acquisition and processing module, and the display module.

[0007] The portable main frame adopts a rectangular tubular alloy to build the main frame, and has a cuboid shape. Four vertical long rods and four horizontal short rods are connected by welding or high-strength bolts to form a rectangular frame structure. Reinforcing ribs are arranged at the four corners of the frame. The reinforcing ribs are triangular alloy plates made of the same material as the main frame, and are fixed at the corners of the frame by welding. Two symmetrical hand-held handles are arranged on one side of the frame, and the surface is wrapped with a non-slip rubber sleeve. Each hand-held handle is connected to the frame body through two metal connectors. Two detachable shoulder straps are arranged on the other side of the frame, and the width is 5-8 cm. The shoulder straps are connected to the frame body through metal fasteners.

[0008] The weak magnetic detection module comprises: A magnetization assembly: adopts a permanent magnet, and is fixedly arranged on the portable main frame to perform stable magnetization treatment on the oil and gas pipeline to generate a uniform magnetic field in the pipeline. A weak magnetic sensor group: a plurality of weak magnetic sensors are arranged on the magnetization assembly, and a fixed interval is maintained between each weak magnetic sensor.

[0009] The magnetization assembly comprises a plurality of permanent magnets, and a plurality of arc-shaped permanent magnets are arranged in sequence around the pipeline to form a complete annular magnetization area.

[0010] The weak magnetic sensors are arranged on the magnetization assembly in a linear array manner, the arrangement direction of the sensors is parallel to the pipeline axis, and a fixed interval is maintained between each weak magnetic sensor.

[0011] The data acquisition and processing module comprises: A data acquisition card: has a multi-channel high-speed acquisition function, and simultaneously acquires a plurality of electrical signals output by the weak magnetic sensor group in real time. Signal conditioning circuit: connected with data acquisition card and weak magnetic sensor group, carries out filter, amplification operation to weak magnetic sensor group output electric signal; Microcontroller: connected with data acquisition card and signal conditioning circuit, receives the data after signal conditioning circuit processing, through comparison normal pipeline magnetic field data and detected magnetic field data, determines the position and characteristic information of pipeline defect.

[0012] The display module adopts liquid crystal display screen, and the pipeline defect information obtained by the data acquisition and processing hardware module is displayed in the form of graphics, text or numbers, including the position diagram of the defect on the pipeline, the defect type identification and the defect characteristic parameters.

[0013] The power module adopts rechargeable lithium battery pack, and is provided with overcharge and overdischarge protection circuit, so that the use safety and service life of the battery pack are ensured.

[0014] The operation module is further included, is arranged on the portable main frame, is connected with the data acquisition and processing unit, and is used for inputting operation instructions, controlling the start, stop and detection parameter setting operation of the device.

[0015] The operation control module includes a key or a touch screen, and the operator inputs corresponding operation instructions through the key or the touch screen, so that the device is conveniently controlled.

[0016] Compared with the prior art, the present application has the following beneficial effects: The portable oil and gas pipeline weak magnetic detection system in the present application is provided with a portable main frame as the basic support structure of the whole detection device, can carry each component and is convenient to carry to different detection sites, no matter whether it is a complex oil and gas pipeline network area in city underground or a remote oil and gas pipeline laying site, the detection personnel can easily transport the system to the specified position, the flexibility and coverage range of the detection work are greatly improved, the detection limitation caused by the large size and difficult movement of the traditional large detection equipment is overcome, and the oil and gas pipeline can be detected in time and effectively under various environments.

[0017] The weak magnetic detection module is arranged on the portable main body frame, is specially used for weak magnetic detection of the oil and gas pipeline, and is used for identifying pipeline defects by detecting weak magnetic field changes of the oil and gas pipeline caused by defects, has high sensitivity and high precision, can sensitively capture weak magnetic field changes of the pipeline caused by defects such as cracks, corrosion and wall thickness thinning, accurately judges the existence and type of the defects, provides a reliable basis for pipeline maintenance and repair, and guarantees safe operation of the oil and gas pipeline. The data acquisition and processing module can acquire and process data in real time, quickly determine the position and characteristic information of the pipeline defects, reduce the time and error of manual data analysis, and provide strong support for formulating a reasonable repair scheme. The display module can display the pipeline defect information in an intuitive and clear graphical or textual form, so that the detection personnel can quickly understand the defect conditions, including position distribution and severity, improve the operability and convenience of the detection work, reduce the requirement for professional skills of the detection personnel, and are beneficial to popularization and application of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The structural block diagram of the portable oil and gas pipeline weak magnetic detection system of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0022] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] The application will be further described in detail below with reference to the accompanying drawings: Referring to Figure 1 The application is a portable oil and gas pipeline weak magnetic detection system, which comprises: The portable main frame carries all components of the detection device and is convenient for carrying to different detection sites. The portable main frame is built with an alloy rectangular tubular main frame, which is in the shape of a cuboid and is formed by four vertical long rods and four horizontal short rods connected by welding or high-strength bolts to form a rectangular frame structure. Reinforcing ribs are arranged at the four corners of the frame, which are made of triangular alloy plates of the same material as the main frame and are fixed at the corners of the frame by welding. Two symmetrical handgrips are arranged on one side of the frame, the surface of which is wrapped with a non-slip rubber sleeve. Each handgrip is connected to the frame main body through two metal connectors. Two detachable shoulder straps are arranged on the other side of the frame, with a width of 5-8 cm, and the shoulder straps are connected to the frame main body through metal fasteners. The portable main frame is the basic support structure of the entire detection device and is made of lightweight high-strength materials such as aluminum alloy or carbon fiber composite materials. Its structure design is reasonable, which can carry the weak magnetic detection module, data acquisition and processing module, display module and power module and is convenient for carrying to different detection sites. Special mounting positions and fixing devices are arranged on the frame to ensure firm installation of the components and prevent loosening or damage during transportation and detection.

[0024] The weak magnetic detection module is arranged on the portable main frame to detect the weak magnetic field of the oil and gas pipeline. The weak magnetic field changes caused by defects in the pipeline are detected to identify the defects in the pipeline. The weak magnetic detection module comprises a magnetization assembly, which is fixed on the portable main frame and is made of permanent magnets to stably magnetize the oil and gas pipeline to generate a uniform magnetic field. The magnetization assembly comprises a plurality of permanent magnets, which are arranged around the pipeline in sequence to form a complete annular magnetization area. A weak magnetic sensor group is arranged on the magnetization assembly, and each weak magnetic sensor maintains a fixed distance. The weak magnetic sensors are arranged on the magnetization assembly in a linear array, the arrangement direction of the sensors is parallel to the pipeline axis, and each weak magnetic sensor maintains a fixed distance. The weak magnetic sensor array is made of high-sensitivity magnetic resistance sensors or Hall sensors, which can sensitively detect the weak magnetic field changes caused by defects in the oil and gas pipeline. The signal conditioning circuit amplifies, filters and processes the weak signals output by the sensors to improve the signal quality and signal-to-noise ratio for subsequent data acquisition and processing. By detecting the weak magnetic field changes around the oil and gas pipeline, the weak magnetic detection module can accurately identify whether the pipeline has defects and the specific type of defects such as cracks, corrosion and wall thickness reduction.

[0025] The data acquisition and processing module is connected with the field weakening detection module, acquires data detected by the field weakening detection module, and determines the position and characteristic information of the pipeline defect. The data acquisition card has a multi-channel high-speed acquisition function, and simultaneously acquires multiple electrical signals output by the field weakening sensor group in real time. The signal conditioning circuit is connected with the data acquisition card and the field weakening sensor group, and performs filtering and amplification operations on the electrical signals output by the field weakening sensor group. The microcontroller is connected with the data acquisition card and the signal conditioning circuit, receives data processed by the signal conditioning circuit, and determines the position and characteristic information of the pipeline defect by comparing normal pipeline magnetic field data and detected magnetic field data.

[0026] The display module is connected with the data acquisition and processing module, and is used for displaying pipeline defect information obtained by the data acquisition and processing module. The display module adopts a liquid crystal display screen to display pipeline defect information obtained by the data acquisition and processing hardware module in the form of graphics, text or numbers, including a position diagram of the defect on the pipeline, a defect type identifier and defect characteristic parameters.

[0027] The power module provides electrical energy required for the operation of the field weakening detection module, the data acquisition and processing module and the display module. The power module adopts a rechargeable lithium battery pack, is provided with an overcharge and overdischarge protection circuit, and ensures the safety and service life of the battery pack.

[0028] The operation module is arranged on the portable main frame, is connected with the data acquisition and processing unit, and is used for inputting operation instructions and controlling the start, stop and detection parameter setting operations of the device. The operation control module includes a key or a touch screen. An operator inputs corresponding operation instructions through the key or the touch screen, and realizes convenient control of the device. Embodiment

[0029] System assembly: first, place the portable main frame on a stable workbench, check whether each component of the frame is intact. In turn, install the field weakening detection module, the data acquisition and processing module, the display module and the power module to the corresponding installation positions of the portable main frame, and use a fixing device to firmly fix each module, so as to ensure that the modules will not be loose during transportation and detection. According to the circuit connection diagram, use appropriate connecting lines to connect the signal lines and power lines between the modules, so as to ensure firm connection and good contact. After connection, carefully check whether the line connection is correct, so as to avoid short circuit or open circuit problems.

[0030] System debugging: turn on the power supply of the power module, start each module of the system. Check if the display module displays normally, if the display is abnormal, check if the power connection and the setting of the display module are correct. Calibrate the weak magnetic detection module, use a standard magnetic field source to calibrate the sensor array, adjust the parameters of the signal conditioning circuit to make the sensor output signal accurately reflect the change of the magnetic field. Test the data acquisition and processing module, input the known analog signal, check if the module can accurately collect and process the signal and output the correct result.

[0031] On-site detection: carry the assembled and debugged portable oil and gas pipeline weak magnetic detection system to the detection site, select appropriate detection position and detection method according to the actual situation of the pipeline. Place the weak magnetic detection module close to the surface of the oil and gas pipeline, maintain a certain detection distance and detection speed to ensure accurate detection of the weak magnetic field change around the pipeline. The data acquisition and processing module collects the data detected by the weak magnetic detection module in real time and processes and analyzes it. The detection personnel can observe the pipeline defect information in real time through the display module, and record the position and characteristic information of the defect in time if abnormal conditions are found.

[0032] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A portable oil and gas pipeline magnetic flux leakage inspection system, characterized in that, The utility model relates to a portable oil and gas pipeline weak magnetic detection device, which comprises the following components: A portable main frame carries all components of the detection device and facilitates carrying to different detection sites; A weak magnetic detection module is arranged on the portable main frame to detect the oil and gas pipeline by weak magnetic detection, and to identify pipeline defects by detecting changes in the weak magnetic field generated by the defects of the oil and gas pipeline; A data acquisition and processing module is connected with the weak magnetic detection module to acquire data detected by the weak magnetic detection module and determine the position and characteristic information of pipeline defects; A display module is connected with the data acquisition and processing module to display pipeline defect information obtained by the data acquisition and processing module; A power module provides power required for the weak magnetic detection module, the data acquisition and processing module and the display module.

2. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 1, wherein, The portable main frame is built with an alloy rectangular tube, which is in the shape of a cuboid and formed by four vertical long rods and four horizontal short rods connected by welding or high-strength bolts, forming a rectangular frame structure; reinforcing ribs are arranged at the four corners of the frame, which are made of triangular alloy plates of the same material as the main frame and fixed at the corners of the frame by welding; Two symmetrical handgrips are arranged on one side of the frame, and the surface is wrapped with a non-slip rubber sleeve; each handgrip is connected with the frame body through two metal connectors; Two detachable shoulder straps are arranged on the other side of the frame, with a width of 5-8 cm, and the shoulder straps are connected with the frame body through metal fasteners.

3. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 1, wherein The weak magnetic detection module comprises: A magnetization assembly is fixedly arranged on the portable main frame and uses permanent magnets to stably magnetize the oil and gas pipeline to generate a uniform magnetic field; A weak magnetic sensor group is arranged on the magnetization assembly, and each weak magnetic sensor maintains a fixed interval.

4. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 3, wherein The magnetization assembly comprises a plurality of permanent magnets, and a plurality of arc-shaped permanent magnets are arranged in sequence around the pipeline to form a complete annular magnetization area.

5. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 3, wherein The weak magnetic sensors are arranged on the magnetization assembly in a linear array, the arrangement direction of the sensors is parallel to the pipeline axis, and each weak magnetic sensor maintains a fixed interval.

6. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 1, wherein, The data acquisition and processing module comprises: A data acquisition card has multi-channel high-speed acquisition function and simultaneously acquires a plurality of electrical signals output by the weak magnetic sensor group in real time; A signal conditioning circuit is connected with the data acquisition card and the weak magnetic sensor group and performs filtering and amplification operation on the electrical signals output by the weak magnetic sensor group; A microcontroller is connected with the data acquisition card and the signal conditioning circuit, receives data processed by the signal conditioning circuit, and determines the position and characteristic information of pipeline defects by comparing normal pipeline magnetic field data and detected magnetic field data.

7. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 1, wherein, The display module uses a liquid crystal display screen to display pipeline defect information obtained by the data acquisition and processing hardware module in the form of graphics, text or numbers, including a position diagram of defects on the pipeline, defect type identification and defect characteristic parameters.

8. A portable magnetic flux leakage inspection system for oil and gas pipelines as defined in claim 1, wherein, The power module uses a rechargeable lithium battery pack and is equipped with overcharge and overdischarge protection circuit to ensure the safety and service life of the battery pack.

9. A portable oil and gas pipeline weak-field detection system as defined in claim 1, wherein, The operation module is arranged on the portable body frame and connected with the data acquisition and processing unit, and is used for inputting operation instructions and controlling the start, stop and parameter setting operation of the device.

10. A portable oil and gas pipeline weak-field detection system as defined in claim 9, wherein, The operation control module comprises a key or a touch screen, and an operator inputs corresponding operation instructions through the key or the touch screen to realize convenient control of the device.

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