Stress detection trolley based on pipeline magnetic flux leakage signal

Abstract

The utility model discloses a stress detection dolly based on a pipeline magnetic flux leakage signal, a dolly chassis is provided with a detection section, a single-chip microcomputer, a battery section and a driving mechanism, the battery section provides electric energy for a circuit system and the driving mechanism on the dolly, and the driving mechanism drives the dolly to move. The detection section is located at the front end of the trolley and used for magnetizing the pipeline in time, picking up magnetic flux leakage signals, sending the magnetic flux leakage signals to the single-chip microcomputer on the rear side for data processing and sending the processing result to the external display terminal for real-time visual monitoring, the whole structure of the trolley is compact, the stress condition of the pipeline can be rapidly obtained based on the magnetic flux leakage signals, and the working efficiency is improved. And the device can move in real time according to detection requirements, so that the pipeline defect detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of internal detection of oil and natural gas pipelines, and more specifically, to a stress detection vehicle based on pipeline magnetic leakage signals. Background Art

[0002] As an important channel for transporting oil and natural gas, it is crucial to ensure the safe operation of pipelines. The existing pipeline magnetic leakage internal detection technology is only a single detection and analysis of defects such as corrosion and pinholes. However, during the long-term operation of the pipeline, it will be affected by factors such as medium pressure, medium flow rate, temperature change, geological activities, traffic load, aging of pipeline materials, corrosion, etc., resulting in changes in pipeline stress. Abnormal stress may lead to safety accidents such as pipeline rupture and leakage, causing casualties, property losses and environmental pollution. Therefore, on the basis of magnetic leakage detection, the stress changes at the pipeline defects can be judged at the same time, which can warn the potential risks of the pipeline in advance, which is of great significance for ensuring the stable operation of the pipeline system and protecting the lives and property of personnel. The existing technology monitors the stress distribution of the pipeline. Strain gauges need to be installed at a certain distance, and the strain sensors are fully covered on the monitoring pipeline, which increases the installation cost. It is impossible to monitor the pipeline section with relatively severe stress state. The monitoring position is too fixed, and the position of the detection mechanism cannot be flexibly adjusted according to the monitoring needs. Summary of the invention

[0003] The utility model aims to provide a stress detection trolley based on pipeline magnetic leakage signals to solve the technical problem of low efficiency in pipeline defect detection in the prior art.

[0004] In order to achieve these purposes and other advantages according to the utility model, a stress detection vehicle based on pipeline magnetic leakage signal is provided, comprising:

[0005] It includes a chassis, and wheels are symmetrically arranged on the front and rear sides of the bottom of the chassis. A detection node, a single-chip microcomputer, and a battery node are fixedly installed on the chassis from front to back. The single-chip microcomputer is connected to an external display terminal for communication. A driving mechanism for driving the wheels to rotate is arranged at the rear end of the chassis. The detection node is used to magnetize the measured pipeline and obtain the leakage magnetic signal at the pipeline defect, and send the leakage magnetic data to the single-chip microcomputer. The single-chip microcomputer is used to calculate the stress according to the leakage magnetic data and send the calculation result to the display terminal for display. The battery node is used to provide power for the detection node, the single-chip microcomputer, and the driving mechanism.

[0006] Preferably, the detection section is composed of a permanent magnet and a Hall sensor array, the permanent magnet is used to magnetize the pipeline under test, and the Hall sensor is used to detect the leakage magnetic signal at the defect of the pipeline under test and send it to the single chip microcomputer.

[0007] Preferably, the single chip microcomputer is an 80C52 single chip microcomputer.

[0008] Preferably, a receiving plate is connected to the bottom of the single chip microcomputer, the receiving plate is fixedly connected to the chassis by bolts, and the single chip microcomputer is fixed to the chassis by the receiving plate.

[0009] Preferably, an alarm is further included, the single chip microcomputer is communicatively connected to the alarm, and the single chip microcomputer is also used to send an alarm signal to the alarm.

[0010] The utility model at least includes the following beneficial effects: the utility model is based on the pipeline magnetic leakage signal stress detection trolley, the detection node, the single chip microcomputer, the battery node, the driving mechanism is arranged on the trolley chassis, the battery node provides power to the circuit system and the driving mechanism on the trolley, the driving mechanism drives the trolley to move, the detection node is located at the front end of the trolley for timely magnetizing the pipeline and picking up the magnetic leakage signal, and then sending it to the single chip microcomputer at the rear side for data processing, and sending the processing result to the external display terminal for real-time visual monitoring. The overall structure of the trolley is compact, and the stress condition of the pipeline can be quickly obtained based on the magnetic leakage signal, and it can move in real time according to the detection needs, thereby improving the efficiency of pipeline defect detection.

[0011] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main structural diagram of the utility model.

[0013] Explanation of the reference numerals in the specification: 1. Detection section, 2. Single chip microcomputer, 3. Support plate, 4. Battery section, 5. Driving motor, 6. Wheel, 7. Chassis, 8. Bearing, 9. Bolt, 10. Permanent magnet, 11. Hall sensor. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0015] In the description of the present invention, terms such as "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0016] like Figure 1As shown, the utility model of the stress detection vehicle based on pipeline magnetic leakage signal includes a chassis 7, and wheels 6 are symmetrically arranged on the front and rear sides of the bottom of the chassis 7, and a detection node 1, a single-chip computer 2, and a battery node 4 are fixedly installed on the chassis 7 from front to back. The single-chip computer 2 is communicatively connected with the external display terminal. The rear end of the chassis 7 is provided with a driving mechanism for driving the wheels 6 to rotate. The detection node 1 is used to magnetize the measured pipeline and obtain the magnetic leakage signal at the pipeline defect, and send the magnetic leakage data to the single-chip computer 2. The single-chip computer 2 is used to calculate the stress according to the magnetic leakage data and send the calculation result to the display terminal for display. The battery node 4 is used to provide power for the detection node 1, the single-chip computer 2, and the driving mechanism.

[0017] The chassis 7 of the trolley is made of alloy structural steel, which has good structural stability and wear resistance. The detection node 1, the single-chip computer 2, the battery node 4, and the driving mechanism are all fixedly connected to the chassis 7 of the trolley. The wheel 6 is composed of a wheel hub and a tire. The wheel hub is made of steel, which has a relatively low cost and strong resistance to metal fatigue. The tire is made of rubber, which can reduce the bumpy feeling during the detection and driving process. Two wheels 6 are respectively arranged on both sides of the chassis 7 of the trolley, forming a structure as shown in FIG. Figure 1 As shown, the front wheel 6 on the right side and the rear wheel 6 on the left side are driven by a driving mechanism and move along the extension direction of the pipeline. Generally, it can be used for buried pipeline detection. The driving mechanism can also be set to communicate with an external display terminal, and a control chip is set to remotely control the operation of the driving mechanism in real time through the display terminal. The leakage magnetic signal of the workpiece defect is picked up in real time through the detection node 1. A signal processing module and an A / D conversion module are set between the detection node and the single-chip microcomputer. After signal processing and A / D conversion, the single-chip microcomputer 2 calculates the required data such as the corresponding stress value and sends it to the external display terminal.

[0018] The utility model discloses a stress detection trolley based on pipeline magnetic leakage signal, wherein a detection node 1, a single chip computer 2, a battery node 4 and a driving mechanism are arranged on the trolley chassis 7, the battery node 4 provides electric energy to the circuit system and the driving mechanism on the trolley, and the driving mechanism drives the trolley to move, the detection node 1 is located at the front end of the trolley and is used to magnetize the pipeline in time and pick up the magnetic leakage signal, and then send it to the single chip computer 2 at the rear side for data processing, and send the processing result to an external display terminal for real-time visual monitoring, the overall structure of the trolley is compact, the stress condition of the pipeline can be quickly obtained based on the magnetic leakage signal, and it can move in real time according to the detection requirements, thereby improving the efficiency of pipeline defect detection.

[0019] The driving mechanism is a driving motor 5. The battery section 4 includes a battery pack, and the battery pack is located between the single chip computer 2 and the driving motor 5 in the front and rear end directions of the chassis 7. The battery is provided to provide kinetic energy for the entire system. In order to prevent the problem of insufficient power, two batteries are generally designed along the width direction of the trolley.

[0020] In another technical solution, Figure 1 As shown, the detection section 1 is composed of a permanent magnet 10 and a Hall sensor 11 array. The permanent magnet 10 is used to magnetize the pipeline under test, and the Hall sensor 11 is used to detect the leakage magnetic signal at the defect of the pipeline under test and send it to the single chip computer 2. The permanent magnet 10 and the Hall sensor 11 array are arranged adjacent to each other, and the permanent magnet 10 is arranged on both sides of the front and back of the Hall sensor 11 to improve the magnetization efficiency and detection accuracy.

[0021] In another technical solution, Figure 1 As shown, the single-chip microcomputer 2 is an 80C52 single-chip microcomputer 2, which improves the reliability of data processing. The single-chip microcomputer 2 is very common in the technical field, and generally has a central processing unit CPU with data processing capabilities, a random access memory RAM, a read-only memory ROM, a variety of I / O ports and interrupt systems, timers / counters and other functions, and its principle is not repeated here. In this embodiment, the corresponding data calculation and signal transmission can be realized.

[0022] In another technical solution, Figure 1 As shown, a receiving plate is connected to the bottom of the single-chip computer 2, and the receiving plate and the chassis 7 are fixedly connected by bolts 9, and the single-chip computer 2 is fixed to the chassis 7 by the receiving plate. The supporting plate 3 is made of alloy structural steel, which has good structural stability and wear resistance. The length and width of the receiving plate are larger than the corresponding side dimensions of the single-chip computer 2. Bolts 9 are set at the top corners of the receiving plate to connect with the chassis 7, which is easy to place and fix the single-chip computer 2. The bolts 9 are composed of a screw and a screw ring. The screw passes through the screw holes opened on the receiving plate and the chassis 7 and is fixed with the screw ring.

[0023] In another technical solution, Figure 1 As shown, an alarm is also included, and the single chip microcomputer 2 is connected to the alarm in communication, and the single chip microcomputer 2 is also used to send an alarm signal to the alarm. A comparison threshold can be set by the single chip microcomputer 2, and the calculation result is compared with the threshold. If the threshold is exceeded, a signal is automatically sent to the alarm, and an alarm is issued through the alarm.

[0024] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the drawings shown and described herein.

Claims

1. A stress detection vehicle based on pipeline magnetic leakage signal, characterized in that: It includes a chassis, and wheels are symmetrically arranged on the front and rear sides of the bottom of the chassis. A detection node, a single-chip microcomputer, and a battery node are fixedly installed on the chassis from front to back. The single-chip microcomputer is connected to an external display terminal for communication. A driving mechanism for driving the wheels to rotate is arranged at the rear end of the chassis. The detection node is used to magnetize the measured pipeline and obtain the leakage magnetic signal at the pipeline defect, and send the leakage magnetic data to the single-chip microcomputer. The single-chip microcomputer is used to calculate the stress according to the leakage magnetic data and send the calculation result to the display terminal for display. The battery node is used to provide power for the detection node, the single-chip microcomputer, and the driving mechanism.

2. The stress detection vehicle based on pipeline magnetic leakage signal according to claim 1 is characterized in that: The detection section is composed of a permanent magnet and a Hall sensor array. The permanent magnet is used to magnetize the pipeline to be tested, and the Hall sensor is used to detect the leakage magnetic signal at the defect of the pipeline to be tested and send it to the single chip microcomputer.

3. The stress detection vehicle based on pipeline magnetic leakage signal according to claim 1 is characterized in that: The single chip microcomputer is an 80C52 single chip microcomputer.

4. The stress detection vehicle based on pipeline magnetic leakage signal according to claim 1 is characterized in that: A receiving plate is connected to the bottom of the single chip microcomputer, and the receiving plate is fixedly connected to the chassis by bolts, and the single chip microcomputer is fixed on the chassis by the receiving plate.

5. The stress detection vehicle based on pipeline magnetic leakage signal according to claim 1 is characterized in that: It also includes an alarm, the single chip microcomputer is communicatively connected with the alarm, and the single chip microcomputer is also used to send an alarm signal to the alarm.

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