Positioning device and method for determining pipeline corrosion parameters

Abstract

The present application provides a positioning device and a method for determining pipeline corrosion parameters, which belongs to the technical field of ultrasonic inspection point marking for valves. The device includes: a frame, a first marking pin, a second marking pin, a first telescopic rod, and a second telescopic rod. The first telescopic rod and the second telescopic rod are provided with a first through hole and a second through hole in the axial direction, respectively. The first marking pin and the second marking pin pass through the first through hole and the second through hole, respectively. The top of the first marking pin and the top of the second marking pin are fixed to the two ends of the frame, and the two ends of the first telescopic rod and the second telescopic rod are fixed to the flange and the valve of the pipeline to be measured, respectively. A level bubble is provided on the frame, which is used to make the frame, the first marking pin and the second marking pin on the same axis of the pipeline. The bottom of the first marking pin and the bottom of the second marking pin are used to mark the first inspection point and the second inspection point on the pipeline. The device improves the accuracy of corrosion detection based on the corrosion parameters of these two inspection points.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic valve detection point marking, and in particular to a positioning device and a method for determining pipeline corrosion parameters. Background Art

[0002] During gas well production, the extracted natural gas contains not only methane but also other impurities such as hydrogen sulfide and carbon dioxide. These impurities can corrode the pipes in the wellhead assembly, causing wall thickness reduction and even perforation, thus hindering the efficient development of the gas well. Therefore, regular inspections of the wellhead assembly pipes are necessary to track corrosion.

[0003] In related technologies, the wall thickness of a pipeline is measured at multiple points, and the thickness of each point is compared with the thickness of the previous measurement. The corrosion status of the pipeline is then determined by combining the comparison results from multiple points. However, because the multiple points measured are not located on the same axis of the pipeline, that is, the locations of the multiple points measured on the pipeline are relatively scattered, the measurement results are not representative, resulting in low accuracy in detecting pipeline corrosion. Summary of the Invention

[0004] The embodiments of the present application provide a positioning device and a method for determining pipeline corrosion parameters, which can improve the accuracy of detecting pipeline corrosion. The technical solution is as follows:

[0005] In one aspect, a positioning device is provided, the device comprising: a frame, a first marking nail, a second marking nail, a first telescopic rod, and a second telescopic rod;

[0006] A first through hole and a second through hole are respectively provided in the axial direction of the first telescopic rod and the second telescopic rod;

[0007] The first marking pin and the second marking pin pass through the first through hole and the second through hole respectively, and the top of the first marking pin and the top of the second marking pin are fixed to two ends of the frame;

[0008] The two ends of the first telescopic rod and the second telescopic rod are respectively fixed to the flange and the valve of the pipeline to be measured;

[0009] The frame is provided with a level bubble, which is used to ensure that the frame, the first marking nail and the second marking nail are on the same axis of the pipeline;

[0010] The bottom of the first marking nail and the bottom of the second marking nail are used to mark a first detection point and a second detection point on the pipeline.

[0011] In a possible implementation, a first sharp component is provided at the bottom of the first marking pin, a first knob is provided at the top of the first marking pin, and the first sharp component and the first knob are connected through a first marking hole inside the first marking pin;

[0012] A second sharp component is provided at the bottom of the second marking pin, a second knob is provided at the top of the second marking pin, and the second sharp component and the second knob are connected through a second marking hole inside the second marking pin;

[0013] The first sharp component is used to mark the pipe under the drive of the first knob;

[0014] The second sharp component is used to mark the pipe under the driving of the second knob.

[0015] In a possible implementation, a first spring is provided between the first knob and the frame, for adjusting the length of the first marking pin passing through the frame;

[0016] A second spring is provided between the second knob and the frame body, for adjusting the length of the second marking pin passing through the frame body.

[0017] In a possible implementation, the first knob is provided with a first injection port connected to the first marking hole, and the first injection port is used to inject a pigment for marking the pipeline;

[0018] The second knob is provided with a second injection port which is in communication with the second marking hole, and the second injection port is used for injecting a pigment for marking the pipeline.

[0019] In a possible implementation, a first limiting piece and a second limiting piece are respectively provided at the bottom of the first marking pin and the second marking pin, for preventing the first marking pin and the second marking pin from falling off the frame.

[0020] In a possible implementation, both ends of the first telescopic rod and the second telescopic rod are respectively provided with magnetic blocks, which are used to fix the both ends of the first telescopic rod and the second telescopic rod to the flange and the valve, respectively.

[0021] In a possible implementation, a first scale line is provided on the first telescopic rod for measuring the distance between the first detection point and the flange, or the distance between the first detection point and the valve;

[0022] The second telescopic rod is provided with a second scale line for measuring the distance between the second detection point and the flange, or the distance between the second detection point and the valve.

[0023] In one possible implementation, a third through hole and a fourth through hole with axes perpendicular to each other are respectively provided at both ends of the frame, the top of the first marking pin passes through the third through hole to be connected to the frame, and the top of the second marking pin passes through the fourth through hole to be connected to the frame.

[0024] In a possible implementation, the frame is a 90-degree fan-shaped frame, and a handle is provided on a side of the frame facing away from the center of the circle for adjusting the horizontal state of the frame.

[0025] In another aspect, a method for determining pipeline corrosion parameters is provided, the method comprising:

[0026] Fixing the first telescopic rod and the second telescopic rod of the positioning device described in any of the above implementations to the flange and valve of the pipeline to be measured respectively;

[0027] Using the vial, position the first marking pin and the second marking pin on the same axis of the pipeline;

[0028] Marking a first inspection point and a second inspection point on the pipeline using the first marking nail and the second marking nail;

[0029] Rotate the positioning device horizontally clockwise along the pipeline by a preset angle, and position the first marking pin and the second marking pin on the same axis of the pipeline through the vial;

[0030] Marking a third inspection point and a fourth inspection point on the pipeline using the first marking nail and the second marking nail;

[0031] measuring first corrosion parameters of the first detection point, the second detection point, the third detection point, and the fourth detection point respectively;

[0032] A second corrosion parameter of the pipeline is determined based on the first corrosion parameter of the first detection point, the first corrosion parameter of the second detection point, the first corrosion parameter of the third detection point, and the first corrosion parameter of the fourth detection point.

[0033] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least:

[0034] An embodiment of the present application provides a positioning device. Since the first marking nail and the second marking nail are arranged at both ends of the frame and a spirit level is provided on the frame, when the positioning device is used to locate the detection point on the pipeline, the first marking nail and the second marking nail can be positioned on the same axis of the pipeline through the calibration of the spirit level. In this way, two detection points on the same axis can be marked on the pipeline by the first marking nail and the second marking nail, and the corrosion parameters of the two detection points on the same axis can represent the corrosion condition of the pipeline, thereby improving the accuracy of corrosion detection based on the corrosion parameters of the two detection points. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 is a schematic diagram of a positioning device provided in an embodiment of the present application;

[0037] Figure 2 is a schematic diagram of another positioning device provided in an embodiment of the present application;

[0038] Figure 3 is a schematic diagram of another positioning device provided in an embodiment of the present application;

[0039] Figure 4 This is a flow chart of a method for determining pipeline corrosion parameters provided in an embodiment of the present application.

[0040] The reference numerals in the figures represent respectively:

[0041] 1-frame;

[0042] 101-Level bubble;

[0043] 102-handle;

[0044] 2-First marking nail;

[0045] 201-first sharp component;

[0046] 202-first knob;

[0047] 203-first marking hole;

[0048] 204-first spring;

[0049] 205-first injection port;

[0050] 206-first limiting piece;

[0051] 3-Second marking nail;

[0052] 301- second sharp component;

[0053] 302-second knob;

[0054] 303-second marking hole;

[0055] 304-second spring;

[0056] 305-second injection port;

[0057] 306-second limiting piece;

[0058] 4-first telescopic rod;

[0059] 401-first scale line;

[0060] 5- second telescopic rod;

[0061] 501-Second scale line. DETAILED DESCRIPTION

[0062] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0063] The terms "first", "second", "third" and "fourth" in the specification, claims and drawings of this application are used to distinguish different objects rather than to describe a specific order.

[0064] The present application embodiment provides a positioning device, see Figure 1 The device includes: a frame 1, a first marking pin 2, a second marking pin 3, a first telescopic rod 4, and a second telescopic rod 5. The first telescopic rod 4 and the second telescopic rod 5 are respectively provided with a first through hole and a second through hole in the axial direction. The first marking pin 2 and the second marking pin 3 pass through the first through hole and the second through hole, respectively. The top of the first marking pin 2 and the top of the second marking pin 3 are fixed to the ends of the frame 1. The ends of the first telescopic rod 4 and the second telescopic rod 5 are respectively fixed to the flange and the valve of the pipeline to be measured. A level bubble 101 is provided on the frame 1 for aligning the frame 1, the first marking pin 2, and the second marking pin 3 on the same axis of the pipeline. The bottom of the first marking pin 2 and the bottom of the second marking pin 3 are used to mark the first and second detection points on the pipeline.

[0065] An embodiment of the present application provides a positioning device. Since the first marking nail 2 and the second marking nail 3 are arranged at both ends of the frame 1, and the frame 1 is provided with a spirit level 101, when the positioning device is used to locate the detection point on the pipeline, the first marking nail 2 and the second marking nail 3 can be positioned on the same axis of the pipeline through the calibration of the spirit level 101. In this way, two detection points on the same axis can be marked on the pipeline through the first marking nail 2 and the second marking nail 3, and the corrosion parameters of the two detection points on the same axis can represent the corrosion condition of the pipeline, thereby improving the accuracy of corrosion detection based on the corrosion parameters of the two detection points.

[0066] Introduction of the first marking nail 2 and the second marking nail 3: see Figure 2 The first marking nail 2 and the second marking nail 3 are respectively arranged at both ends of the frame 1.

[0067] Among them, the top of the first marking nail 2 and the top of the second marking nail 3 are fixed at the two ends of the frame 1, and the two ends of the frame 1 are respectively provided with a third through hole and a fourth through hole with axes perpendicular to each other. The top of the first marking nail 2 is connected to the frame 1 through the third through hole, and the top of the second marking nail 3 is connected to the frame 1 through the fourth through hole.

[0068] Among them, the first marking nail 2 and the second marking nail 3 are slender structures, and the diameters of the first marking nail 2 and the second marking nail 3 are smaller than the diameters of the third through hole and the fourth through hole, so that the first marking nail 2 and the second marking nail 3 can pass through the third through hole and the fourth through hole respectively, and then the bottom of the first marking nail 2 and the bottom of the second marking nail 3 mark the first detection point and the second detection point on the pipeline.

[0069] When it is necessary to mark the pipeline, the first marking nail 2 and the second marking nail 3 pass through the third through hole and the fourth through hole on the frame 1 respectively, and the tops of the first marking nail 2 and the second marking nail 3 are connected to the frame 1 respectively. The parts of the first marking nail 2 and the second marking nail 3 passing through the frame 1 can be extended between the valve and the flange through their slender structure to mark the pipeline between the valve and the flange.

[0070] In an embodiment of the present application, a first marking nail 2 and a second marking nail 3 are provided to mark the pipeline to be measured. Since the slender structure of the first marking nail 2 and the second marking nail 3 is convenient for extending into between the valve and the flange of the pipeline, it is convenient to mark on the pipeline.

[0071] Continue to see Figure 2The bottom of the first marking pin 2 is provided with a first sharp component 201, and the top of the first marking pin 2 is provided with a first knob 202. The first sharp component 201 and the first knob 202 are connected through a first marking hole 203 inside the first marking pin 2. The bottom of the second marking pin 3 is provided with a second sharp component 301, and the top of the second marking pin 3 is provided with a second knob 302. The second sharp component 301 and the second knob 302 are connected through a second marking hole 303 inside the second marking pin 3.

[0072] The first sharp component 201 is used to mark the pipe under the drive of the first knob 202 ; the second sharp component 301 is used to mark the pipe under the drive of the second knob 302 .

[0073] In a possible implementation, the first marking nail 2 is detachably connected to the first sharp component 201 , and the second marking nail 3 is detachably connected to the second sharp component 301 .

[0074] The first marking nail 2 and the first sharp component 201 are connected by threads, making the connection between the first marking nail 2 and the first sharp component 201 more flexible. The second marking nail 3 and the second sharp component 301 are connected by threads, making the connection between the second marking nail 3 and the second sharp component 301 more flexible.

[0075] The first sharp component 201 and the second sharp component 301 both have conical tips. By setting the first sharp component 201 and the second sharp component 301 as conical tips, the first sharp component 201 and the second sharp component 301 can more firmly contact the pipe to be measured and are less likely to slip, thereby enabling the first sharp component 201 and the second sharp component 301 to mark the pipe.

[0076] In a possible implementation, the first knob 202 and the second knob 302 are respectively fixed to the top of the first marking pin 2 and the second marking pin 3 by welding.

[0077] Among them, the first knob 202 and the second knob 302 are cylinders, and the diameter of the first knob 202 and the second knob 302 is larger than the diameter of the main body of the first marking pin 2 and the second marking pin 3, and smaller than the diameter of the third through hole and the fourth through hole on the frame 1, so that after the first marking pin 2 and the second marking pin 3 pass through the third through hole and the fourth through hole respectively, they are fixed to the two ends of the frame 1 respectively through the first knob 202 and the second knob 302 on the top.

[0078] In one possible implementation, first marking hole 203 and second marking hole 303 respectively penetrate first marking pin 2 and second marking pin 3. The lengths of first marking hole 203 and second marking hole 303 match the lengths of first marking pin 2 and second marking pin 3, and the axes of first marking hole 203 and second marking hole 303 respectively coincide with the axes of first marking pin 2 and second marking pin 3. The diameters of first marking hole 203 and second marking hole 303 are smaller than the diameters of first marking pin 2 and second marking pin 3, and the diameters of first marking hole 203 and second marking hole 303 are no greater than 1 cm.

[0079] Continue to see Figure 2 The first knob 202 is provided with a first injection port 205 connected to the first marking hole 203, and the first injection port 205 is used to inject the pigment for marking the pipeline. The second knob 302 is provided with a second injection port 305 connected to the second marking hole 303, and the second injection port 305 is used to inject the pigment for marking the pipeline.

[0080] The first injection port 205 and the second injection port 305 are both cylindrical through-holes, located at the center of the upper halves of the first knob 202 and the second knob 302, respectively. The axes of the first injection port 205 and the second injection port 305 are parallel to the axes of the first knob 202 and the second knob 302, respectively. The diameters of the first injection port 205 and the second injection port 305 are respectively smaller than the diameters of the first knob 202 and the second knob 302, and the thicknesses of the first injection port 205 and the second injection port 305 are respectively smaller than the thicknesses of the first knob 202 and the second knob 302, respectively.

[0081] In one possible implementation, the device further includes an injector. When marking the first detection point, the injector cooperates with the first injection port 205 to inject marking pigment into the first marking hole 203. When the first marking pin 2 is not connected to the first sharp component 201, the pigment can pass through the first marking hole 203 that extends through the first marking pin 2 and mark the pipe. When the first sharp component 201 is connected to the bottom of the first marking pin 2, the pigment passes through the first marking hole 203, the first sharp component 201, and finally the first sharp component 201 to mark the pipe.

[0082] When marking the second detection point, the syringe and second injection port 305 cooperate to inject pigment into the second marking hole 303. When the second sharp component 301 is not connected to the second marking nail 3, the pigment can pass through the second marking hole 303 that runs through the second marking nail 3 and mark the pipeline. When the second sharp component 301 is connected to the bottom of the second marking nail 3, the pigment passes through the second marking hole 303, the second sharp component 301, and finally the second sharp component 301 to mark the pipeline.

[0083] In a possible implementation, a first limiting piece 206 and a second limiting piece 306 are respectively provided at the bottom of the first marking nail 2 and the second marking nail 3 to prevent the first marking nail 2 and the second marking nail 3 from falling off the frame 1 .

[0084] Among them, the first limiting plate 206 and the second limiting plate 306 are circular or square sheet structures, and the size of the first limiting plate 206 and the second limiting plate 306 is larger than the diameter of the third through hole and the fourth through hole on the frame 1, so that the first marking pin 2 and the second marking pin 3 will not fall off from the frame 1.

[0085] The first limiting piece 206 is located between the body of the first marking nail 2 and the first sharp component 201, and the first limiting piece 206 and the first marking nail 2 are detachably connected. The second limiting piece 306 is located between the body of the second marking nail 3 and the second sharp component 301, and the second limiting piece 306 and the second marking nail 3 are detachably connected. This facilitates both removal and installation of the first marking nail 2 and the second marking nail 3 on the frame 1.

[0086] Continue to see Figure 2 A first spring 204 is provided between the first knob 202 and the frame 1 for adjusting the length of the first marking nail 2 passing through the frame 1; a second spring 304 is provided between the second knob 302 and the frame 1 for adjusting the length of the second marking nail 3 passing through the frame 1.

[0087] The first spring 204 and the second spring 304 are respectively sleeved on the first marking nail 2 and the second marking nail 3. The lengths of the first spring 204 and the second spring 304 can be set and changed as needed, and no specific limitation is made here.

[0088] Introduction of frame 1: frame 1 is a 90-degree fan-shaped frame. Figure 2 The two ends of the frame 1 are connected to the first marking nail 2 and the second marking nail 3 respectively.

[0089] A vial 101 is provided on the frame 1 to align the frame 1, the first marking pin 2, and the second marking pin 3 with the pipe. The vial 101 is located in the center of the frame 1 and contains a bubble. When the bubble is centered, it indicates a level state.

[0090] The vial 101 may be a plastic vial, a metal vial or a glass vial.

[0091] Continue to participate Figure 2 A handle 102 is provided on the side of the frame 1 facing away from the center of the circle for adjusting the horizontal state of the frame 1.

[0092] Among them, the handle 102 is fixed to the frame 1 by welding and is fixedly connected to the frame 1. The frame 1 is adjusted by the handle 102. When the bubble in the level bubble 101 is in the center position, it indicates that it is in a horizontal state, that is, the frame 1, the first marking nail 2 and the second marking nail 3 are on the same axis of the pipeline.

[0093] Among them, the diameter of the frame 1 is larger than the diameter of the pipe to be measured, so that the frame 1 can be fixed on the outside of the pipe, and the thickness of the frame 1 is larger than the diameter of the third through hole and the fourth through hole at both ends of the frame 1, so that the first marking nail 2 and the second marking nail 3 can pass through the third through hole and the fourth through hole to connect with the frame 1.

[0094] Introduction of the first telescopic rod 4 and the second telescopic rod 5: see Figure 3 The first telescopic rod 4 and the second telescopic rod 5 are connected to the first marking nail 2 and the second marking nail 3 respectively.

[0095] The first and second telescopic rods 4 and 5 are elongated rods, each having a first through-hole and a second through-hole defined axially therethrough. The first and second marking pins 2 and 3 pass through the first and second through-holes, respectively, to connect with the first and second telescopic rods 4 and 5. The diameters of the first and second marking pins 2 and 3 match those of the first and second through-holes, enabling them to pass through the first and second through-holes, respectively, to connect with the first and second telescopic rods 4 and 5.

[0096] Continue to see Figure 3 Magnetic blocks are provided at both ends of the first telescopic rod 4 and the second telescopic rod 5, respectively, for fixing the ends of the first telescopic rod 4 and the second telescopic rod 5 to the flange and the valve, respectively.

[0097] The first telescopic rod 4 includes a first rod member and a first rod sleeve, and the second telescopic rod 5 includes a second rod member and a second rod sleeve. The first rod member and the first rod sleeve, as well as the second rod member and the second rod sleeve, are both connected by a pin. The diameters of the first and second rod members are smaller than those of the first and second rod sleeves. The first rod member can freely extend and retract into the first rod sleeve, and the second rod member can freely extend and retract into the second rod sleeve, thereby adjusting the length of the first and second telescopic rods 4 and 5, thereby allowing the length of the first and second telescopic rods 4 and 5 to be adjusted according to the distance between the flange and the valve. Magnetic blocks are provided at one end of the rod member and the rod sleeve, respectively, so that the device can be fixed to pipes of different sizes via the magnetic blocks on the rod member and the rod sleeve, making the fixing process convenient and flexible.

[0098] Continue to see Figure 3The first telescopic rod 4 is provided with a first scale line 401 for measuring the distance between the first detection point and the flange, or the distance between the first detection point and the valve. The second telescopic rod 5 is provided with a second scale line 501 for measuring the distance between the second detection point and the flange, or the distance between the second detection point and the valve.

[0099] Among them, the first scale line 401 is set on the first rod member, the second scale line 501 is set on the second rod member, and the first through hole is set at the end of the first rod sleeve connected to the first rod member, the first marking nail 2 is connected to the first telescopic rod 4 through the first through hole, the second through hole is set at the end of the second rod sleeve connected to the second rod member, and the second marking nail 3 is connected to the second telescopic rod 5 through the second through hole, so that the extended length of the first rod member is the distance between the first detection point and the flange or valve, and the extended length of the second rod member is the distance between the second detection point and the flange or valve.

[0100] When both the first and second rod members are connected to the flange, and both the first and second rod sleeves are connected to the valve, the first telescopic rod 4 measures the distance between the first detection point and the flange, and the second telescopic rod 5 measures the distance between the second detection point and the flange, so that the distances between the first and second detection points and the flange are the same. When both the first and second rod members are connected to the valve, and both the first and second rod sleeves are connected to the flange, the first telescopic rod 4 measures the distance between the first detection point and the valve, and the second telescopic rod 5 measures the distance between the second detection point and the valve, so that the distances between the first and second detection points and the valve are the same.

[0101] In the embodiment of the present application, the device is fixed on the pipeline by setting the first telescopic rod 4 and the second telescopic rod 5, so that the first marking nail 2 and the second marking nail 3 are stable and not easy to slip when marking on the pipeline, thereby improving the accuracy of the marked detection points, and the first telescopic rod 4 and the second telescopic rod 5 are provided with scale lines, which can enable multiple marked detection points to be located on the same axis of the pipeline.

[0102] In another possible implementation, the distance between the first detection point and the flange or valve measured by the first telescopic rod, and the distance between the second detection point and the flange or valve measured by the second telescopic rod are recorded. When the pipeline is inspected for corrosion next time, even if the detection points marked by the first marking nail and the second marking nail are not clearly marked, the same detection points can be found by recording the distances measured by the first telescopic rod and the second telescopic rod. This reduces the error caused by changes in point positions during regular pipeline inspections, improves detection accuracy, and makes result analysis more reliable.

[0103] An embodiment of the present application provides a positioning device. Since the first marking nail 2 and the second marking nail 3 are arranged at both ends of the frame 1, and the frame 1 is provided with a spirit level 101, when the positioning device is used to locate the detection point on the pipeline, the first marking nail 2 and the second marking nail 3 can be positioned on the same axis of the pipeline through the calibration of the spirit level 101. In this way, two detection points on the same axis can be marked on the pipeline through the first marking nail 2 and the second marking nail 3, and the corrosion parameters of the two detection points on the same axis can represent the corrosion condition of the pipeline, thereby improving the accuracy of corrosion detection based on the corrosion parameters of the two detection points.

[0104] The present invention provides a method for determining pipeline corrosion parameters. Figure 4 , methods include:

[0105] Step 401: fix the first telescopic rod 4 and the second telescopic rod 5 in the positioning device to the flange and the valve of the pipeline to be measured respectively.

[0106] The first telescopic rod 4 and the second telescopic rod 5 are respectively fixed to the flange and the valve of the pipeline to be measured through the magnetic blocks at both ends.

[0107] Step 402: Use the vial 101 to position the first marking pin 2 and the second marking pin 3 on the same axis of the pipeline.

[0108] Among them, by adjusting the handle 102 at one end of the frame 1 so that the bubble in the level bubble 101 is located at the center of the level bubble 101, the frame 1 is in a horizontal state, that is, the first marking nail 2 and the second marking nail 3 at both ends of the frame 1 are located on the same axis of the pipeline.

[0109] Step 403: Mark the first detection point and the second detection point on the pipeline using the first marking nail 2 and the second marking nail 3.

[0110] This step can be achieved by following the steps (1) and (2), including:

[0111] (1) Use a syringe to inject pigment into the first injection port 205 and the second injection port 305 respectively. The pigment passes through the first marking hole 203 and the first sharp component 201 in sequence, and then marks the first detection point on the pipeline. The pigment passes through the second marking hole 303 and the second sharp component 301 in sequence, and then marks the second detection point on the pipeline.

[0112] (2) When the first telescopic rod 4 is used to measure the distance between the first detection point and the flange, the second telescopic rod 5 is used to measure the distance between the second detection point and the flange so that the distances between the first detection point and the second detection point and the flange are the same, and the distances between the first detection point and the second detection point and the flange are recorded to provide a reference for the next measurement.

[0113] When the first telescopic rod 4 is used to measure the distance between the first detection point and the valve, the second telescopic rod 5 is used to measure the distance between the second detection point and the valve, so that the distances between the first detection point and the second detection point and the valve are the same, and the distances between the first detection point and the second detection point and the valve are recorded to provide a reference for the next measurement.

[0114] Step 404: Rotate the positioning device horizontally clockwise along the pipeline by a preset angle, and position the first marking pin 2 and the second marking pin 3 on the same axis of the pipeline through the vial 101.

[0115] Among them, the preset angle can be 90 degrees. The positioning device is rotated horizontally 90 degrees clockwise along the pipeline, and the handle 102 at one end of the frame 1 is adjusted so that the bubble in the level bubble 101 is located at the center of the level bubble 101. Then the frame 1 is in a horizontal state, that is, the first marking nail 2 and the second marking nail 3 are located on the same axis of the pipeline.

[0116] Among them, the preset angle can be 180 degrees. The positioning device is rotated horizontally 180 degrees clockwise along the pipeline, and the handle 102 at one end of the frame 1 is adjusted so that the bubble in the level bubble 101 is located at the center of the level bubble 101. Then the frame 1 is in a horizontal state, that is, the first marking nail 2 and the second marking nail 3 are located on the same axis of the pipeline.

[0117] Step 405 : Mark the third inspection point and the fourth inspection point on the pipeline using the first marking nail 2 and the second marking nail 3 .

[0118] When the preset angle is 90 degrees, the bottom of the first marking pin 2 contacts the second detection point, and the bottom of the second marking pin 3 contacts the third detection point, marking the third detection point. Rotating 90 degrees clockwise again, the bottom of the first marking pin 2 contacts the third detection point, and the bottom of the second marking pin 3 contacts the fourth detection point, marking the fourth detection point.

[0119] Step 406: Measure first corrosion parameters at the first detection point, the second detection point, the third detection point, and the fourth detection point respectively.

[0120] The measurement method adopts ultrasonic single-point detection technology, and uses an ultrasonic probe to measure the first corrosion parameters of the first detection point, the second detection point, the third detection point and the fourth detection point respectively.

[0121] The first corrosion parameters of the first detection point, the second detection point, the third detection point and the fourth detection point are the wall thicknesses of the first detection point, the second detection point, the third detection point and the fourth detection point.

[0122] Step 407: Determine a second corrosion parameter of the pipeline based on the first corrosion parameter of the first detection point, the first corrosion parameter of the second detection point, the first corrosion parameter of the third detection point, and the first corrosion parameter of the fourth detection point.

[0123] In a possible implementation, the second corrosion parameter of the pipeline is obtained based on an average of the first corrosion parameter of the first detection point, the first corrosion parameter of the second detection point, the first corrosion parameter of the third detection point, and the first corrosion parameter of the fourth detection point.

[0124] In another possible implementation, the second corrosion parameter of the pipeline is obtained based on the sum of the first corrosion parameter of the first detection point, the first corrosion parameter of the second detection point, the first corrosion parameter of the third detection point, and the first corrosion parameter of the fourth detection point.

[0125] In an embodiment of the present application, a positioning device is used to mark the pipeline to be measured. Since the positioning device can locate two detection points on the pipeline that are on the same axis, the positioning device is used to mark two detection points on the pipeline for the first time. After the positioning device is rotated horizontally, the positioning device is used to mark two detection points on the pipeline again. As a result, the four detection points marked by the positioning device are on the same axis of the pipeline. The corrosion parameters of the four detection points on the same axis can represent the corrosion condition of the pipeline. The corrosion parameters of the pipeline can be determined by measuring the corrosion parameters of the four detection points, which can improve the accuracy of pipeline corrosion detection.

[0126] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A positioning device for determining pipeline corrosion parameters, characterized in that: The device comprises: a frame (1), a first marking nail (2), a second marking nail (3), a first telescopic rod (4) and a second telescopic rod (5); A first through hole and a second through hole are respectively provided in the axial direction of the first telescopic rod (4) and the second telescopic rod (5); The first marking pin (2) and the second marking pin (3) pass through the first through hole and the second through hole respectively, and the top of the first marking pin (2) and the top of the second marking pin (3) are fixed to the two ends of the frame (1), and the frame (1) is a 90-degree fan-shaped frame; A first sharp component (201) is provided at the bottom of the first marking pin (2), a first knob (202) is provided at the top of the first marking pin (2), and the first sharp component (201) and the first knob (202) are connected through a first marking hole (203) inside the first marking pin (2); The first knob (202) is provided with a first injection port (205) in communication with the first marking hole (203), and the first injection port (205) is used to inject a pigment for marking the pipeline; A second sharp component (301) is provided at the bottom of the second marking nail (3), a second knob (302) is provided at the top of the second marking nail (3), and the second sharp component (301) and the second knob (302) are connected through a second marking hole (303) inside the second marking nail (3); The second knob (302) is provided with a second injection port (305) in communication with the second marking hole (303), and the second injection port (305) is used to inject a pigment for marking the pipeline; The two ends of the first telescopic rod (4) and the second telescopic rod (5) are respectively fixed on the flange and valve of the pipeline to be measured; The frame (1) is provided with a level bubble (101) for ensuring that the frame (1), the first marking pin (2) and the second marking pin (3) are located on the same axis of the pipeline; The first sharp component (201) is used to mark a first measuring point on the pipe with the pigment injected through the first injection port (205) under the drive of the first knob (202); The second sharp component (301) is used to mark a second measuring point on the pipeline with the pigment injected through the second injection port (305) under the drive of the second knob (302).

2. The positioning device according to claim 1, characterized in that A first spring (204) is provided between the first knob (202) and the frame (1), for adjusting the length of the first marking nail (2) passing through the frame (1); A second spring (304) is provided between the second knob (302) and the frame (1) for adjusting the length of the second marking pin (3) passing through the frame (1).

3. The positioning device according to claim 1, characterized in that A first limiting piece (206) and a second limiting piece (306) are respectively provided at the bottom of the first marking nail (2) and the second marking nail (3), for preventing the first marking nail (2) and the second marking nail (3) from falling off the frame (1).

4. The positioning device according to claim 1, characterized in that Magnetic blocks are provided at both ends of the first telescopic rod (4) and the second telescopic rod (5), respectively, for fixing the ends of the first telescopic rod (4) and the second telescopic rod (5) to the flange and the valve, respectively.

5. The positioning device according to claim 1, characterized in that The first telescopic rod (4) is provided with a first scale line (401) for measuring the distance between the first measuring point and the flange, or the distance between the first measuring point and the valve; The second telescopic rod (5) is provided with a second scale line (501) for measuring the distance between the second measuring point and the flange, or the distance between the second measuring point and the valve.

6. The positioning device according to claim 1, characterized in that A third through hole and a fourth through hole are respectively provided at both ends of the frame body (1), the axes of which are perpendicular to each other; the top of the first marking pin (2) passes through the third through hole to be connected to the frame body (1); and the top of the second marking pin (3) passes through the fourth through hole to be connected to the frame body (1).

7. The positioning device according to claim 1, characterized in that A handle (102) is provided on the side of the frame (1) facing away from the center of the circle, for adjusting the horizontal state of the frame (1).

8. A method for determining pipeline corrosion parameters, characterized in that: The method comprises: Fixing the first telescopic rod (4) and the second telescopic rod (5) in the positioning device according to any one of claims 1 to 7 respectively on the flange and valve of the pipeline to be measured; Positioning the first marking pin (2) and the second marking pin (3) on the same axis of the pipeline by means of the vial (101); Marking a first measuring point and a second measuring point on the pipeline using the first marking nail (2) and the second marking nail (3); Rotate the positioning device clockwise horizontally along the pipeline by a preset angle, and position the first marking pin (2) and the second marking pin (3) on the same axis of the pipeline through the vial (101); Marking a third measuring point and a fourth measuring point on the pipeline using the first marking nail (2) and the second marking nail (3); measuring first corrosion parameters at the first measurement point, the second measurement point, the third measurement point, and the fourth measurement point, respectively; A second corrosion parameter of the pipeline is determined based on the first corrosion parameter of the first measurement point, the first corrosion parameter of the second measurement point, the first corrosion parameter of the third measurement point, and the first corrosion parameter of the fourth measurement point.

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