Pipeline base material detection reference line drawing tool

Abstract

The invention discloses a pipeline base material detection reference line drawing tool which comprises a mounting plate, a center rod rotationally connected with one side of the mounting plate, a hand wheel fixed to the end, away from the mounting plate, of the center rod and a center shaft rotationally connected with the side, away from the mounting plate, of the hand wheel. A fixing assembly used for fixing the connecting rod is arranged on the center shaft, a scale plate is fixed to the side, away from the center shaft, of the side wall of the connecting rod, a stabilizing rod is arranged at the end, away from the connecting rod, of the scale plate, and the end, close to the pipeline body with the reference line to be drawn, of the stabilizing rod abuts against the outer wall of the pipeline body. The scale plate is sleeved with a sliding sleeve in sliding fit with the scale plate, an oily pen is detachably installed on the sliding sleeve, a pen point of the oily pen abuts against the outer wall of the pipeline body, and a centering mechanism used for adjusting the center rod to be coaxial with the pipeline body and keeping the position of the installation plate fixed is arranged on the installation plate. According to the method, the defect detection precision of phased array ultrasonic detection on the pipeline welding seam is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and particularly relates to a tooling for drawing a detection reference line of pipeline base metal. Background Art

[0002] The detection of pipeline base metal refers to the detection of the pipeline body material, aiming to evaluate the quality status of its surface and near-surface. The detection content includes checking whether there are defects such as cracks and corrosion on the surface of the pipeline base metal to ensure the safety and service life of the pipeline.

[0003] Nondestructive testing is the most direct and effective method to detect defects in pressure pipeline welded joints and prevent accidents such as leakage, explosion, and instability of pressure pipelines. At present, in the inspection of pressure pipelines, ray detection and ultrasonic detection methods are mainly used for the detection of buried defects. The qualitative and height measurement of defects are the key points and difficulties of the detection, and directly affect the safety status grade assessment of pressure pipelines. The phased array technology can more accurately qualitatively and measure the height of buried defects in pressure pipeline welded joints, providing a reliable and efficient detection technical means for the safety status grade assessment of pressure pipelines.

[0004] The concept of phased array technology originated from the electromagnetic wave technology of radar antennas. Ultrasonic phased arrays were first only used in the medical field. In recent years, with the rapid development of new technologies such as microelectronics and computers, ultrasonic phased arrays have gradually been applied to the field of industrial nondestructive testing. Ultrasonic phased arrays can flexibly generate deflected and focused sound beams through the orderly superposition of sound beams emitted by each array element, and can complete high-resolution detection of the detection area without replacing the probe. Moreover, its unique working modes such as linear scanning, sector scanning, and dynamic focusing can perform high-efficiency detection without moving or with little movement of the probe. Therefore, compared with other ultrasonic detection methods, the sound beam of ultrasonic phased arrays is more flexible, the detection speed is faster, the resolution is higher, and the image-based detection results are more intuitive, and can achieve the accurate qualitative determination of defects and relatively accurate height measurement.

[0005] The phased array ultrasonic testing technology usually uses the standard "Nondestructive Testing of Pressure Equipment - Part 15: Phased Array Ultrasonic Testing" NB / T 47013.115 - 2021, which has specific regulations on the reference line before detection (6.4.8.5 Reference line, a predetermined line for walking along the step direction during scanning. Before detecting a pipeline using phased array technology, a reference line should be set on the scanning surface for longitudinal vertical scanning. The distance between the reference line and the weld center line on one side of the detection area should be determined according to the process settings; during scanning, the deviation between the probe position and the set reference line position should not be greater than 5%). The reference line has a great influence on the detection results. For example, when the front end distance is 50 mm, the variation is not greater than 5%, that is, an error of 2.5 mm.

[0006] In the prior art, when drawing a reference line for pipeline wood, marks are usually made by measuring distances on the outer wall of the pipeline first, and then the marks are connected. The errors include measurement error, marking error, and drawing error. Secondly, the process of drawing the reference line takes a long time and has low efficiency. Summary of the Invention

[0007] To solve the above problems, the present invention provides a reference line drawing tooling for pipeline base material detection.

[0008] The above technical object of the present invention is achieved by the following technical solutions: The reference line drawing tooling for pipeline base material detection includes a mounting plate, a central rod rotatably connected to one side of the mounting plate, a handwheel fixed to the end of the central rod away from the mounting plate, and a central shaft rotatably connected to the side of the handwheel away from the mounting plate. A connecting rod is sleeved on the side of the central shaft away from the handwheel. A fixing component for fixing the connecting rod is arranged on the central shaft. A scale plate is fixed at a position on the side wall of the connecting rod away from the central shaft. A stabilizing rod is arranged at the end of the scale plate away from the connecting rod. One end of the stabilizing rod close to the pipeline body to be drawn with the reference line abuts against the outer wall of the pipeline body. A sliding sleeve slidably matched with the scale plate is sleeved on the scale plate. An oil-based pen is detachably installed on the sliding sleeve. The tip of the oil-based pen abuts against the outer wall of the pipeline body. A centering mechanism for adjusting the central rod to be coaxial with the pipeline body and keeping the position of the mounting plate fixed is arranged on the mounting plate.

[0009] By adopting the above technical solutions, when drawing a reference line at a position on the outer wall of the pipeline body close to the weld, the staff first needs to use the centering mechanism to adjust the central rod to be coaxial with the pipeline body and keep the position of the mounting plate fixed. Then, the fixing component can be used to fix the connecting rod and the central shaft. By sliding the sliding sleeve to the corresponding position on the scale plate and fixing it, and then rotating the connecting rod, the corresponding reference line can be directly drawn on the outer wall of the pipeline body by the oil-based pen, changing the cumbersome operation in the traditional technology of making multiple marks on the outer wall of the pipeline body and then connecting the multiple marks into a reference line, improving the drawing accuracy of the reference line, and being beneficial to improving the defect detection accuracy of phased array ultrasonic testing for pipeline welds.

[0010] Furthermore, a driving bevel gear is fixedly sleeved on the central rod. The centering mechanism is composed of three centering components evenly distributed about the axis of the central rod. The centering component includes an inner plate body fixed on the side wall of the mounting plate, an outer plate body fixed on the side wall of the mounting plate and parallel to the inner plate body, a threaded rod penetrating through the inner plate body and rotatably connected to the inner plate body, a driven bevel gear fixed at one end of the threaded rod and meshing with the driving bevel gear, and a limiting rod sleeved on the threaded rod and threadedly connected to the threaded rod. The limiting rod penetrates through the outer plate body and is slidably matched with the outer plate body. A grip rod is fixed on the side of the mounting plate close to the handwheel.

[0011] By adopting the above technical solution, when the centering mechanism can be used to adjust the coaxiality of the central rod and the pipe body, the staff only needs to rotate the handwheel, and the central rod can drive the driving bevel gear to rotate, so that the driven bevel gear meshing with the driving bevel gear and the threaded rod fixed to the driven bevel gear both rotate. Since the threaded rod is threadedly connected to the limiting rod and the limiting rod is slidably engaged with the outer plate body, the limiting rod moves toward the side away from the axis of the pipe body until the handwheel stops rotating when the end of the limiting rod away from the axis of the pipe body abuts against the inner wall of the pipe body, ensuring the stability during the process of the oil-based pen drawing a reference line on the outer wall of the pipe body.

[0012] Further, a rubber block is fixed to the end of the limiting rod away from the axis of the central rod, and a through hole for the threaded rod to pass through is provided through the rubber block.

[0013] By adopting the above technical solution, the rubber block is made of rubber material and has good elastic properties. The setting of the rubber block plays a good protective role for the inner wall of the pipe body and increases the friction between the limiting rod and the inner wall of the pipe body, further improving the stability during the process of the oil-based pen drawing a reference line on the outer wall of the pipe body.

[0014] Further, the central axis passes through the connecting rod and is in clearance fit with the connecting rod. The fixing assembly includes a fixing nut sleeved on the central axis and threadedly connected to the central axis, and a rubber pad sleeved on the central axis and in clearance fit with the central axis. There are two groups of the fixing assemblies and they are symmetrically distributed about the connecting rod.

[0015] By adopting the above technical solution, the fixing nuts on both sides of the connecting rod are simultaneously screwed towards the connecting rod until the sides of the two rubber pads close to each other respectively abut against both sides of the connecting rod. At this time, the connecting rod can rotate around the axis of the central axis, so that the oil-based pen on the scale plate can draw a reference line on the outer wall of the pipe body.

[0016] Further, a ball rollingly connected to the outer wall of the pipe body is movably installed at the end of the stabilizing rod close to the axis of the pipe body.

[0017] By adopting the above technical solution, the setting of the ball reduces the friction between the stabilizing rod and the outer wall of the pipe body, ensuring the smoothness during the process of the oil-based pen drawing a reference line on the outer wall of the pipe body.

[0018] Further, a mounting ring is fixed to the outer wall of one side of the sliding sleeve, the inner wall of the mounting ring fits with the outer wall of the oil-based pen, and a first bolt threadedly connected to the mounting ring is provided through the mounting ring.

[0019] Further, a connecting shaft is fixed to the end of the scale plate away from the connecting rod, a through groove for the connecting shaft to pass through is provided on the stabilizing rod, and a fastening nut threadedly connected to the connecting shaft is sleeved on the connecting shaft.

[0020] By adopting the above technical solution, after loosening the first bolt, the staff can adjust the position of the oil-based pen relative to the scale plate. After loosening the fastening nut, the position of the stabilizing rod relative to the scale plate can be adjusted to keep the tip of the oil-based pen and the ball on the stabilizing rod in contact with the outer wall of the pipe body, so as to facilitate drawing reference lines on the outer walls of pipe bodies with different diameters.

[0021] Furthermore, a second bolt that is threadedly connected to the sliding sleeve is penetrated through the side wall of the sliding sleeve.

[0022] By adopting the above technical solution, the sliding sleeve can be fixed at any position on the scale plate.

[0023] In summary, the present invention has the following beneficial effects:

[0024] When the staff draws a reference line at a position on the outer wall of the pipe body close to the weld, they first need to use the centering mechanism to adjust the central rod to be coaxial with the pipe body and keep the position of the mounting plate fixed. Then, they use the fixing component to fix the connecting rod to the central axis. By sliding the sliding sleeve to the corresponding position on the scale plate and fixing it, and then rotating the connecting rod, the corresponding reference line can be directly drawn on the outer wall of the pipe body with the oil-based pen, which changes the cumbersome operation of making multiple marks on the outer wall of the pipe body and then connecting the multiple marks into a reference line in the traditional technology, improves the drawing accuracy of the reference line, and is beneficial to improving the defect detection accuracy of phased array ultrasonic testing for pipe welds. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0026] Figure 2 is the structural schematic diagram of the embodiment of the present invention for highlighting the centering mechanism;

[0027] Figure 3 is Figure 2 the structural schematic diagram from another perspective;

[0028] Figure 4 is the structural schematic diagram of the sliding sleeve in the embodiment of the present invention;

[0029] Figure 5 is the connection structural schematic diagram of the scale plate and the stabilizing rod in the embodiment of the present invention.

[0030] In the figure: 1. mounting plate; 11. grip bar; 2. central rod; 21. driving bevel gear; 3. handwheel; 4. central shaft; 5. connecting rod; 6. fixing assembly; 61. fixing nut; 62. rubber pad; 7. scale plate; 71. sliding sleeve; 711. second bolt; 72. mounting ring; 721. first bolt; 73. connecting shaft; 731. fastening nut; 8. stabilizing rod; 81. ball; 82. through groove; 9. centering mechanism; 91. centering assembly; 911. inner plate body; 912. outer plate body; 913. threaded rod; 914. driven bevel gear; 915. limiting rod; 9151. rubber block; 91511. through hole; 10. oil-based pen. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0032] As Figures 1-5 shown, the embodiment of the present application discloses a tooling for drawing a reference line for pipeline base material detection, including a mounting plate 1, a central rod 2 rotatably connected to one side of the mounting plate 1, a handwheel 3 fixed to the end of the central rod 2 away from the mounting plate 1, and a central shaft 4 rotatably connected to the side of the handwheel 3 away from the mounting plate 1. A connecting rod 5 is sleeved on the side of the central shaft 4 away from the handwheel 3. A fixing assembly 6 for fixing the connecting rod 5 is arranged on the central shaft 4. A scale plate 7 is fixed at a position on the side wall of the connecting rod 5 away from the central shaft 4. A stabilizing rod 8 is arranged at the end of the scale plate 7 away from the connecting rod 5. One end of the stabilizing rod 8 close to the pipeline body to be drawn with the reference line abuts against the outer wall of the pipeline body. A sliding sleeve 71 slidably matched with the scale plate 7 is sleeved on the scale plate 7. A second bolt 711 threadedly connected to the sliding sleeve 71 penetrates through the side wall of the sliding sleeve 71. An oil-based pen 10 is detachably installed on the sliding sleeve 71. The tip of the oil-based pen 10 abuts against the outer wall of the pipeline body. A centering mechanism 9 for adjusting the central rod 2 to be coaxial with the pipeline body and keeping the position of the mounting plate 1 fixed is arranged on the mounting plate 1.

[0033] When drawing a reference line at a position on the outer wall of the pipe body close to the weld, the staff first need to use the centering mechanism 9 to adjust the center rod 2 to be coaxial with the pipe body and keep the position of the mounting plate 1 fixed. Subsequently, the fixing component 6 can be used to fix the connecting rod 5 to the central shaft 4. By sliding the sliding sleeve 71 to the corresponding position on the scale plate 7 and fixing it, and then rotating the connecting rod 5, the corresponding reference line can be directly drawn on the outer wall of the pipe body with an oil-based pen 10, which changes the cumbersome operation in the traditional technology of making multiple marks on the outer wall of the pipe body and then connecting the multiple marks into a reference line, improves the drawing accuracy of the reference line, and is beneficial to improving the defect detection accuracy of the phased array ultrasonic detection for the pipe weld.

[0034] A driving bevel gear 21 is fixedly sleeved on the center rod 2. The centering mechanism 9 is composed of three centering components 91 evenly distributed about the axis of the center rod 2. The centering component 91 includes an inner plate body 911 fixed on the side wall of the mounting plate 1, an outer plate body 912 fixed on the side wall of the mounting plate 1 and parallel to the inner plate body 911, a threaded rod 913 penetrating through the inner plate body 911 and rotatably connected to the inner plate body 911, a driven bevel gear 914 fixed at one end of the threaded rod 913 and meshing with the driving bevel gear 21, and a limiting rod 915 sleeved on the threaded rod 913 and threadedly connected to the threaded rod 913; the limiting rod 915 penetrates through the outer plate body 912 and is slidably matched with the outer plate body 912. A grip rod 11 is fixed on one side of the mounting plate 1 close to the handwheel 3.

[0035] When using the centering mechanism 9 to adjust the center rod 2 to be coaxial with the pipe body, the staff only need to hold the grip rod 11 and rotate the handwheel 3, then the driving bevel gear 21 can be driven to rotate by the center rod 2, so that the driven bevel gear 914 meshing with the driving bevel gear 21 and the threaded rod 913 fixed to the driven bevel gear 914 both rotate. Since the threaded rod 913 is threadedly connected to the limiting rod 915 and the limiting rod 915 is slidably matched with the outer plate body 912, the limiting rod 915 moves towards the side away from the axis of the pipe body until the end of the limiting rod 915 away from the axis of the pipe body abuts against the inner wall of the pipe body, and then stop rotating the handwheel 3, which ensures the stability during the process of drawing the reference line on the outer wall of the pipe body with the oil-based pen 10.

[0036] A rubber block 9151 is fixed at one end of the limiting rod 915 away from the axis of the center rod 2. A through hole 91511 for the threaded rod 913 to pass through is penetrated through the rubber block 9151. The rubber block 9151 is made of rubber material and has good elastic properties. The setting of the rubber block 9151 plays a good protective role for the inner wall of the pipe body and increases the friction between the limiting rod 915 and the inner wall of the pipe body, further improving the stability during the process of drawing the reference line on the outer wall of the pipe body with the oil-based pen 10.

[0037] The central axis 4 penetrates through the connecting rod 5 and is in clearance fit with the connecting rod 5. The fixing assembly 6 includes a fixing nut 61 sleeved on the central axis 4 and threadedly connected to the central axis 4, and a rubber pad 62 sleeved on the central axis 4 and in clearance fit with the central axis 4. There are two groups of fixing assemblies 6 and they are symmetrically distributed with respect to the connecting rod 5.

[0038] Simultaneously screw the fixing nuts 61 on both sides of the connecting rod 5 towards the connecting rod 5 until the mutually approaching sides of the two rubber pads 62 respectively abut against both sides of the connecting rod 5. At this time, the connecting rod 5 can rotate around the axis of the central axis 4 so that the oil-based pen 10 on the scale plate 7 can draw a reference line on the outer wall of the pipe body.

[0039] A ball 81 that is in rolling connection with the outer wall of the pipe body is movably installed at one end of the stabilizing rod 8 close to the axis of the pipe body. The setting of the ball 81 reduces the friction between the stabilizing rod 8 and the outer wall of the pipe body, ensuring the smoothness during the process of the oil-based pen 10 drawing a reference line on the outer wall of the pipe body.

[0040] An installation ring 72 is fixed on the outer wall of one side of the sliding sleeve 71. The inner wall of the installation ring 72 fits with the outer wall of the oil-based pen 10. A first bolt 721 that is threadedly connected to the installation ring 72 is penetrated through the installation ring 72. A connecting shaft 73 is fixed at one end of the scale plate 7 away from the connecting rod 5. A through groove 82 (the details of the through groove 82 are only shown in Figure 5 is shown) for the connecting shaft 73 to pass through is provided on the stabilizing rod 8. A fastening nut 731 that is threadedly connected to the connecting shaft 73 is sleeved on the connecting shaft 73. After loosening the first bolt 721, the staff can adjust the position of the oil-based pen 10 relative to the scale plate 7. After loosening the fastening nut 731, the position of the stabilizing rod 8 relative to the scale plate 7 can be adjusted to keep the tip of the oil-based pen 10 and the ball 81 on the stabilizing rod 8 both abut against the outer wall of the pipe body, so as to facilitate drawing reference lines on the outer walls of pipe bodies with different diameters.

[0041] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. The tooling for drawing reference lines for pipeline parent material detection is characterized by: The invention comprises a mounting plate (1), a center rod (2) rotatably connected to one side of the mounting plate (1), a hand wheel (3) fixed to one end of the center rod (2) away from the mounting plate (1), and a center shaft (4) rotatably connected to the side of the hand wheel (3) away from the mounting plate (1), wherein a connecting rod (5) is sleeved on the side of the center shaft (4) away from the hand wheel (3), a fixing assembly (6) for fixing the connecting rod (5) is arranged on the center shaft (4), and a scale plate (7) is fixed to a position of a side wall of the connecting rod (5) away from the center shaft (4), and the scale plate (7) A stabilizing rod (8) is provided at one end away from the connecting rod (5), and one end of the stabilizing rod (8) close to the pipe body on which the reference line is to be drawn abuts against the outer wall of the pipe body. The scale plate (7) is provided with a sliding sleeve (71) that is slidably matched with the scale plate (7), and an oil pen (10) is detachably mounted on the sliding sleeve (71), and the tip of the oil pen (10) abuts against the outer wall of the pipe body. The mounting plate (1) is provided with a centering mechanism (9) for adjusting the center rod (2) to be coaxial with the pipe body and keeping the mounting plate (1) in a fixed position.

2. The tool for drawing reference lines for detecting pipe parent materials according to claim 1 is characterized in that: A driving bevel gear (21) is fixedly sleeved on the center rod (2), and the centering mechanism (9) is composed of three groups of centering components (91) uniformly distributed about the axis of the center rod (2), the centering component (91) comprising an inner plate body (911) fixed on the side wall of the mounting plate (1), an outer plate body (912) fixed on the side wall of the mounting plate (1) and parallel to the inner plate body (911), a threaded rod (913) penetrating the inner plate body (911) and rotatably connected to the inner plate body (911), a driven bevel gear (914) fixed to one end of the threaded rod (913) and meshing with the driving bevel gear (21), and a limiting rod (915) sleeved on the threaded rod (913) and threadedly connected to the threaded rod (913); the limiting rod (915) penetrates the outer plate body (912) and slidably cooperates with the outer plate body (912), and a gripping rod (11) is fixed on the side of the mounting plate (1) close to the hand wheel (3).

3. The tool for drawing reference lines for detecting pipe parent materials according to claim 2 is characterized in that: A rubber block (9151) is fixed to one end of the limiting rod (915) away from the axis of the central rod (2), and a through hole (91511) is provided through the rubber block (9151) for the threaded rod (913) to pass through.

4. The tool for drawing reference lines for detecting pipe parent materials according to claim 2 is characterized in that: The central shaft (4) passes through the connecting rod (5) and is loosely fitted with the connecting rod (5); the fixing assembly (6) comprises a fixing nut (61) sleeved on the central shaft (4) and threadedly connected to the central shaft (4) and a rubber pad (62) sleeved on the central shaft (4) and loosely fitted with the central shaft (4); the fixing assembly (6) is provided with two groups and is symmetrically distributed with respect to the connecting rod (5).

5. The tool for drawing reference lines for detecting pipe parent materials according to claim 2 is characterized in that: A ball (81) is movably mounted on one end of the stabilizing rod (8) close to the axis of the pipeline body and is rollingly connected to the outer wall of the pipeline body.

6. The tool for drawing reference lines for detecting pipe parent materials according to claim 5 is characterized by: A mounting ring (72) is fixed on the outer wall of one side of the sliding sleeve (71), the inner wall of the mounting ring (72) is in contact with the outer wall of the oil pen (10), and a first bolt (721) threadedly connected to the mounting ring (72) is provided through the mounting ring (72).

7. The tool for drawing reference lines for detecting pipe parent materials according to claim 6 is characterized by: A connecting shaft (73) is fixed to one end of the scale plate (7) away from the connecting rod (5); a through slot (82) for the connecting shaft (73) to pass through is provided on the stabilizing rod (8); and a fastening nut (731) threadedly connected to the connecting shaft (73) is sleeved on the connecting shaft (73).

8. The tool for drawing reference lines for detecting pipe parent materials according to claim 7 is characterized in that: A second bolt (711) threadedly connected to the sliding sleeve (71) is provided through the side wall of the sliding sleeve (71).

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