Detector odometer wheel device in gathering and transportation pipeline and operation method of detector odometer wheel device

Abstract

The invention discloses a gathering and transportation pipeline internal detector odometer wheel device and an operation method thereof, and belongs to the technical field of oil and gas gathering and transportation pipeline integrity management. The device comprises an odometer wheel body hollow structure, a Hall component probe mounting piece, an odometer wheel supporting main rod, an odometer wheel body, an odometer wheel body bearing, an odometer wheel main bearing, an odometer wheel spring, a Hall component probe and a magnet block. Meanwhile, the invention further discloses an operation method of the detector odometer wheel device in the gathering and transportation pipeline. According to the technical scheme, the intelligent internal detector odometer wheel suitable for the gathering and transportation pipeline with the small caliber and the low curvature radius is provided, the structure is compact and simple, the durability is high, the number of parts is small, the signal interference degree is small, the passing capacity of a 1.5 D elbow can be met, and the odometer wheel is suitable for application and popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrity management of oil and gas gathering and transportation pipelines, especially the technical field of intelligent internal detection, and relates to a gathering and transportation pipeline internal detector mileage wheel device and an operating method thereof, and specifically, to a small-diameter gathering and transportation pipeline internal detector mileage wheel device and an operating method thereof. Background Art

[0002] With the continuous advancement of oil and gas development, the scale of oil and gas gathering and transportation pipelines is becoming larger and larger. By the end of 2021, PetroChina has more than 370,000 kilometers of oil and gas gathering and transportation pipelines, and more than 70% are small-diameter pipelines (pipe diameter does not exceed DN100). Due to low construction standards, poor performance of anti-corrosion layers, complex transportation media, and harsh internal and external corrosion environments, small-diameter gathering and transportation pipelines have many pipe body defects and high failure rates, which deserve your attention. In order to ensure the safety of the pipe body, pipe body defects need to be regularly inspected, evaluated and repaired. Magnetic leakage internal detection technology has become the main technology for oil and gas pipeline body defect detection due to its advantages such as high detection rate, high clarity and high precision, and is widely used in large-diameter pipelines. Due to the limitations of the geometric dimensions of small-diameter pipelines in oil fields and their more demanding pipeline inner wall environment, it is necessary to develop a new type of mileage wheel to meet working conditions.

[0003] The existing patent application number is 202111072732.8. In order to enable the odometer to move in both directions, a bidirectional odometer wheel train and a pipeline detector have been applied for. A bidirectional odometer wheel train includes a body, which is used to carry the odometer expansion component to move in the pipeline to be tested; at least two odometer wheels are arranged on the outside of the body; and an expansion mechanism drives any odometer wheel to move in a direction away from the body. When the bidirectional odometer wheel train is located in the pipeline to be tested, the expansion mechanism drives the odometer wheel to move away from the body until it contacts and presses against the inner wall of the pipeline to be tested. When the bidirectional odometer wheel train moves in the pipeline, the odometer wheel rotates to achieve mileage measurement. When encountering a weld or a protrusion, the expansion mechanism drives the odometer wheel to move so that the odometer wheel is close to the body, thereby facilitating the odometer wheel train to pass through the weld and realize the bidirectional movement of the odometer wheel train. This invention patent is essentially no different from the odometer wheel of the detector in the large-diameter pipeline, and the expansion machine of the small-diameter detector usually has a response delay due to the running speed of the detector when passing through the weld and the protrusion, resulting in serious errors.

[0004] The existing patent application number is 201910786700.0, which discloses a mileage wheel device. The mileage wheel is characterized in that at least one Hall element and at least one group or multiple magnetic beads are respectively arranged on the wheel and the rotating shaft relative to each other, and at least one Hall element senses the magnetic field of at least one group or multiple magnetic beads through the relative rotation of the wheel and the rotating shaft to pick up the pulse signal. It can avoid the mileage wheel from being stuck due to the adsorption of iron filings in the pipeline by the mileage wheel magnetic beads, thereby improving the safety of the instrument running in the pipeline; it can reduce the volume of mileage measurement and optimize the underground pipeline locator mechanism. The distance between the Hall element and the magnetic beads of the device is too small, and the magnetic beads are prone to mutual influence, especially when the detector is running at high speed, the electromagnetic pulse signal is prone to reading errors.

[0005] The existing patent application number is 201310743806.5, which discloses a mileage measurement mechanism for pipeline detection, including a detector, a mileage wheel, a floating arm, a spring and a sensor, and a detection body, wherein the detection body is connected to the detector through a signal cable, and its characteristics are: both ends of the floating arm are connected to the mileage wheel through a pin shaft, and one end of the floating arm is also connected to the rotating arm through a pin shaft; the other end of the rotating arm is connected to the detector through a connecting shaft; the sum of the length of the floating arm and the radius of the two mileage wheels is greater than the inner diameter of the pipeline; the two ends of the spring are respectively connected to the rotating arm and the floating arm, and the three are in a triangular structure. The structure of this device is not suitable for detection in small-diameter pipelines. Based on the traditional spring design, although the device fits the pipe wall better, it increases the length of the small-diameter internal device, which is not conducive to the passage of a curvature radius of 1.5D. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects existing in the prior art and to provide a mileage wheel device for a gathering and transportation pipeline internal detector and an operation method thereof, which is suitable for an intelligent internal detector mileage wheel for gathering and transportation pipelines with small diameter and low curvature radius. It has a compact and simple structure, strong durability, few parts, low degree of signal interference, and can meet the passing capacity of 1.5D elbows.

[0007] The embodiment of the present invention is achieved as follows:

[0008] On the one hand, an embodiment of the present invention provides a mileage wheel device for a detector in a gathering and transportation pipeline, comprising a mileage wheel body hollow structure, a Hall element probe mounting part, a mileage wheel supporting main rod, a mileage wheel body, a mileage wheel body bearing, a mileage wheel main bearing, a mileage wheel spring, a Hall element probe and a magnet block;

[0009] The hollow structure of the mileage wheel body is located outside the mileage wheel body, is evenly arranged, and is provided with slots according to the requirements of small-caliber size;

[0010] The Hall element probe mounting piece is fixed to the mileage wheel support main rod by a triangular fixture and is located directly above the hollow structure of the mileage wheel body;

[0011] The mileage wheel support main rod adopts a double support design, and is installed overlapping with the mileage wheel main bearing up and down;

[0012] The mileage wheel body is in the shape of a disc, and the edge of the mileage wheel body is a hollow structure;

[0013] The two ends of the mileage wheel spring are respectively inserted into the mileage wheel supporting main rod, and the downward pressure of the tube wall on the mileage wheel is converted into spring torsion;

[0014] The Hall element probe is arranged directly above the hollow groove of the mileage wheel body;

[0015] The magnet blocks are evenly arranged in the inner circular cavity of the mileage wheel body.

[0016] Furthermore, the number of the slots is 16.

[0017] Furthermore, the mileage wheel body bearing and the mileage wheel main bearing are solid.

[0018] Going a step further, its material is TC4 titanium alloy.

[0019] Furthermore, the mileage wheel spring is a torsion spring.

[0020] Furthermore, the magnet blocks are arranged every 60 degrees to uniformly magnetize the mileage wheel body.

[0021] Furthermore, the Hall element probes are symmetrically arranged at the upper end and the lower end of the two mileage wheel bodies.

[0022] On the other hand, an embodiment of the present invention provides a method for operating a detector mileage wheel device in a gathering and transportation pipeline, comprising the following steps:

[0023] Step 1: Install the active magnetic flux leakage odometer wheel in the above method to ensure that its mechanical working condition is normal, connect the odometer wheel to the small-caliber magnetic flux leakage internal detector electronic node, and rotate the odometer wheel to ensure that the electronic node receives the signal.

[0024] Step 2: After the odometer device is debugged as described in step 1, the odometer can be put into normal use. During normal use, the odometer device should be started to record before the sending and receiving tube is placed.

[0025] Step 3: The mileage wheel runs normally in the pipeline, and the internal detector records the mileage along the pipe wall. Every time the mileage wheel sweeps across the hollow structure, it will receive a leakage magnetic signal. Each signal represents that the mileage wheel has rotated a certain angle. The signal is transmitted to the electronic node for recording for later mileage calculation.

[0026] Step 4: After the odometer wheel device is taken out of the transmitting and receiving tube, the running distance of the internal detector is calculated. The running speed and mileage of the internal detector are calculated based on the recorded electromagnetic signal pulses and the corresponding time. The odometer wheel time record is kept consistent with the leakage magnetic part of the internal detector. Later, the computer identifies the leakage magnetic signal number n according to the threshold statistics, and the leakage magnetic number is increased by 1 every time the threshold is exceeded. The basic principle of the calculation is as follows:

[0027] Original value n=0;

[0028] The mileage wheel passes through the hollow component once per rotation (magnetic leakage signal is generated once, and the signal threshold is crossed once), n=n+1;

[0029] Mileage information

[0030] Speed ​​information (properly relax the calculation interval to make the speed calculation more accurate), taking a full circle of the odometer as an example,

[0031] Where n represents the number of magnetic leakage signals received by the Hall element in the odometer wheel, s represents the total mileage of the odometer wheel rotating in contact with the pipe wall, r represents the radius of the odometer wheel from the center of rotation to the edge of the wheel, v represents the speed of the odometer wheel, t represents time, and t(n) represents the time when the odometer wheel receives the nth magnetic leakage signal.

[0032] The two odometers are recorded separately and calculated uniformly, and the speed and mileage are taken as the average of the two.

[0033] The beneficial effects of the embodiments of the present invention are:

[0034] The present invention provides a gathering and transportation pipeline internal detector mileage wheel device and an operation method thereof. The device is an intelligent internal detector mileage wheel suitable for gathering and transportation pipelines with small diameter and low curvature radius. It has a compact and simple structure, strong durability, few parts, and a low degree of signal interference. It can meet the passing capacity of 1.5D elbows of DN100 small diameter pipelines and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of the overall structure of the mileage wheel device of the detector in the gathering and transportation pipeline;

[0037] Figure 2It is a cross-sectional view of the mileage wheel device of the detector in the gathering and transportation pipeline;

[0038] Figure 3 It is a single section of a small-diameter pipeline magnetic leakage internal detector matched with this mileage wheel device;

[0039] Figure 4 This is an electrical schematic diagram of the relevant components of the small-diameter pipeline magnetic leakage internal detector that is compatible with this mileage wheel device;

[0040] Among them, 1- hollow structure of the mileage wheel body, 2- Hall element probe mounting part, 3- mileage wheel supporting main rod, 4- mileage wheel body, 5- mileage wheel body bearing, 6- mileage wheel main bearing, 7- mileage wheel spring, 8- Hall element probe, 9- magnet block. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Please refer to Figure 1 to Figure 2 The first embodiment of the present invention provides a detector mileage wheel device in a gathering and transportation pipeline, comprising: Figure 1 The mileage wheel body hollow structure 1, the Hall element probe mounting part 2, the mileage wheel supporting main rod 3 and the mileage wheel body 4 are composed; and Figure 2 The mileage wheel body bearing 5, the mileage wheel main bearing 6, the mileage wheel spring 7, the Hall element probe 8 and the magnet block 9.

[0043] like Figure 1 As shown, the hollow structure 1 of the mileage wheel body is located outside the mileage wheel body and is evenly arranged. A total of 16 slots are designed according to the small-diameter size requirements. The hollow design facilitates the passage of magnetic signals and is located directly below the probe.

[0044] The Hall element probe mounting part 2 is fixed to the mileage wheel supporting main rod 3 by a triangular fixture and is located directly above the mileage wheel body hollow structure 1, which is conducive to signal collection.

[0045] The mileage wheel supports the main rod 3 as follows Figure 2 The double support design shown above Figure 2 The middle mileage wheel main bearing 6 is installed in an overlapping manner to ensure stability during stretching, extrusion and installation.

[0046] The mileage wheel body 4 adopts a traditional disc design, and the hollow edge structure can ensure the maximum torsional strength of the mileage wheel structure when it is stuck, and ensure the single-circuit pulse number of the magnetic signal, thereby ensuring accuracy.

[0047] The mileage wheel body bearing 5 and the mileage wheel main bearing 6 are solid in design and made of TC4 titanium alloy to ensure strength while reducing weight.

[0048] The mileage wheel spring 7 is a torsion spring, both ends of which are respectively inserted into the mileage wheel support main rod 3. The downward pressure of the tube wall on the mileage wheel is converted into spring torsion, which saves the overall space of the mileage wheel to the maximum extent.

[0049] The Hall element probe 8 is placed just above the hollow groove of the mileage wheel body, and 16 electromagnetic pulses constitute one rotation cycle to calculate the mileage.

[0050] The magnet blocks 9 are evenly arranged in the inner circular cavity of the mileage wheel body, with one block arranged every 60 degrees, to evenly magnetize the mileage wheel body 4.

[0051] In order to improve the passing capacity of the internal detector elbow, reduce the length of the rotating connection block as much as possible, and improve its rigidity and strength, the bearing material is made of TC4 titanium alloy and is integrated by electric spark wire cutting.

[0052] In order to balance the weight of the odometer wheel and evenly collect symmetrical signals, the Hall element probes are symmetrically arranged at the upper and lower ends of the two odometer wheel bodies.

[0053] In order to improve the passing performance of the internal detector and meet the passing capacity of the 1.5D elbow, the length of the mileage wheel support main rod is about 1D.

[0054] In order to ensure that the edges of the two mileage wheels cannot exceed 1.2D when the spring is completely relaxed, and must not be less than 2 times the diameter of the mileage wheel when it is fully pressed down.

[0055] In actual application, the mileage wheel joint of the inner detector has a cabin to connect the mileage wheel main bearing 6, and the mileage wheel joint is placed behind the power leather cup at the first end of the small-caliber inner detector.

[0056] In a specific embodiment, the mileage wheel device of the present invention is installed in the first section of a DN100 small-caliber magnetic leakage detector. Figure 3 As shown, the device has no vulnerable components, and the matching power cup constitutes the power source of the whole machine.

[0057] The mileage wheel prototype was subjected to vibration tests and temperature and pressure tests to verify its working performance. The mileage wheel device was subjected to 19Hz and 2000Hz vibration tests for 20 minutes in both the axial and radial directions, -20℃~70℃ temperature shock tests, and 6.3Mpa 24-hour pressure tests in 18℃ water environment. The appearance and structure of the mileage wheel device were not damaged, and the electrical components were operating normally.

[0058] An embodiment of the present invention further provides an operation method of a detector mileage wheel device in a gathering and transportation pipeline, comprising the following steps:

[0059] Step 1: Install the active magnetic flux leakage odometer wheel in the above method to ensure that its mechanical working condition is normal, connect the odometer wheel to the small-caliber magnetic flux leakage internal detector electronic node, and rotate the odometer wheel to ensure that the electronic node receives the signal.

[0060] Step 2: After the odometer device is debugged as described in step 1, the odometer can be put into normal use. During normal use, the odometer device should be started to record before the sending and receiving tube is placed.

[0061] Step 3: The mileage wheel runs normally in the pipeline, and the internal detector records the mileage along the pipe wall. Every time the mileage wheel sweeps across the hollow structure, it will receive a leakage magnetic signal. Each signal represents that the mileage wheel has rotated a certain angle. The signal is transmitted to the electronic node for recording for later mileage calculation.

[0062] Figure 4 This is an electrical schematic diagram of the relevant components of the small-diameter pipeline magnetic leakage internal detector that is compatible with this mileage wheel device.

[0063] Step 4: After the odometer wheel device is taken out of the transmitting and receiving tube, the running distance of the internal detector is calculated. The running speed and mileage of the internal detector are calculated based on the recorded electromagnetic signal pulses and the corresponding time. The odometer wheel time record is kept consistent with the leakage magnetic part of the internal detector. Later, the computer identifies the leakage magnetic signal number n according to the threshold statistics, and the leakage magnetic number is increased by 1 every time the threshold is exceeded. The basic principle of the calculation is as follows:

[0064] Original value n=0;

[0065] The mileage wheel passes through the hollow component once per rotation (magnetic leakage signal is generated once, and the signal threshold is crossed once), n=n+1;

[0066] Mileage information

[0067] Speed ​​information (properly relax the calculation interval to make the speed calculation more accurate), taking a full circle of the odometer as an example,

[0068] Where n represents the number of magnetic leakage signals received by the Hall element in the odometer wheel, s represents the total mileage of the odometer wheel rotating in contact with the pipe wall, r represents the radius of the odometer wheel from the center of rotation to the edge of the wheel, v represents the speed of the odometer wheel, t represents time, and t(n) represents the time when the odometer wheel receives the nth magnetic leakage signal.

[0069] The two odometers are recorded separately and calculated uniformly, and the speed and mileage are taken as the average of the two.

[0070] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A detector mileage wheel device in a gathering and transportation pipeline, characterized in that: It includes a hollow structure of the mileage wheel body, a Hall element probe mounting part, a mileage wheel supporting main rod, a mileage wheel body, a mileage wheel body bearing, a mileage wheel main bearing, a mileage wheel spring, a Hall element probe and a magnet block; The hollow structure of the mileage wheel body is located outside the mileage wheel body, is evenly arranged, and is provided with slots according to the requirements of small-caliber size; The Hall element probe mounting piece is fixed to the mileage wheel support main rod by a triangular fixture and is located directly above the hollow structure of the mileage wheel body; The mileage wheel support main rod adopts a double support design, and is installed overlapping with the mileage wheel main bearing up and down; The mileage wheel body is in the shape of a disc, and the edge of the mileage wheel body is a hollow structure; The two ends of the mileage wheel spring are respectively inserted into the mileage wheel supporting main rod, and the downward pressure of the tube wall on the mileage wheel is converted into spring torsion; The Hall element probe is arranged directly above the hollow groove of the mileage wheel body; The magnet blocks are evenly arranged in the inner circular cavity of the mileage wheel body.

2. The detector mileage wheel device in the gathering and transportation pipeline according to claim 1 is characterized in that: The number of the slots is 16.

3. The detector mileage wheel device in the gathering and transportation pipeline according to claim 1 is characterized in that: The mileage wheel body bearing and the mileage wheel main bearing are solid.

4. The detector mileage wheel device in the gathering and transportation pipeline according to claim 3 is characterized in that: Its material is TC4 titanium alloy.

5. The detector mileage wheel device in the gathering and transportation pipeline according to claim 1 is characterized in that: The mileage wheel spring is a torsion spring.

6. The detector mileage wheel device in the gathering and transportation pipeline according to claim 1, characterized in that: The magnet blocks are arranged every 60 degrees to evenly magnetize the mileage wheel body.

7. The detector mileage wheel device in the gathering and transportation pipeline according to claim 1, characterized in that: The Hall element probes are symmetrically arranged at the upper end and the lower end of the two mileage wheel bodies.

8. An operating method for a detector mileage wheel device in a gathering and transportation pipeline according to claim 1, characterized in that: The following steps are involved: Step 1: Install and debug the mileage wheel; Step 2: Put the mileage wheel device into the front of the receiving and sending tube to start recording; Step 3: The mileage wheel runs normally in the pipeline, and the signal is transmitted to the electronic node for recording; Step 4: After the mileage wheel device is taken out from the transmitting and receiving ball barrel, the running stroke of the internal detector is calculated.

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