Pipeline welding seam surface profile nondestructive measurement equipment and measurement method

Abstract

The invention relates to the technical field of pipeline welding seam surface profile measurement, in particular to pipeline welding seam surface profile nondestructive measurement equipment and a measurement method. One end of the slideway is fixedly connected with a frame of a micrometer, a distance measuring screw of the micrometer is rotatably connected with the slider, the other end of the slider is fixedly connected with the upper end of a support, and an electronic dial indicator is fixed at the lower end of the support and is in communication connection with a computer. The electronic dial indicator replaces a traditional welding inspection ruler, so that the measurement precision is remarkably improved; a computer is combined to collect displacement data in real time and automatically generate a weld contour curve, manual reading errors are eliminated, and full-process data automatic processing is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline weld surface profile measurement, and in particular to a pipeline weld surface profile non-destructive measurement device and a measurement method. Background Art

[0002] As long-distance pipelines develop towards larger diameters, higher steel grades, and higher pressures, higher requirements are placed on pipeline welding. The appearance quality of pipeline welds plays a critical role in the safe operation of pipelines.

[0003] Currently, the most commonly used nondestructive testing method for weld appearance is a welding gauge. This gauge uses actual measurements to determine whether weld dimensions, such as reinforcement, width, undercut, and groove depth, meet long-distance pipeline standards. However, the accuracy of a welding gauge is generally limited to 0.1mm, and the measurement process is significantly affected by human factors, resulting in certain errors. This is especially true for automated welding processes with narrow welds. The location and number of measurement points are also limited, making it difficult to accurately reflect the weld's appearance quality. Summary of the Invention

[0004] The main purpose of the present invention is to provide a device and a measuring method capable of performing high-precision non-destructive measurement of the weld surface profile of a pipeline.

[0005] In order to achieve the above object, the technical solution provided by the present invention is: A non-destructive measurement device for the surface profile of a pipeline weld comprises a permanent magnet, a slideway fixed to the upper end of the permanent magnet, a slider slidingly arranged on the slideway, one end of the slideway fixedly connected to the frame of a micrometer, a measuring screw of the micrometer rotatably connected to the slider, the other end of the slider fixedly connected to the upper end of a bracket, an electronic dial indicator fixed to the lower end of the bracket, and the electronic dial indicator communicatively connected to a computer.

[0006] Specifically, the bracket is in an inverted Z shape.

[0007] Specifically, a permanent magnet is adsorbed on the pipe on one side of the weld. At this time, the contact of the electronic micrometer contacts the pipe wall, and the position of the permanent magnet is adjusted so that the sliding direction of the slider is parallel to the axial direction of the pipe; the knob of the micrometer is turned so that the measuring screw drives the slider, the bracket and the electronic micrometer close to the weld. When the contact of the electronic micrometer approaches the weld, the electronic micrometer is adjusted to zero, and the differential cylinder knob of the micrometer is turned. During the rotation of the differential cylinder knob, the measuring screw drives the slider, the bracket and the electronic micrometer to move slowly. When the electronic micrometer moves slowly, it is restricted by the surface contour of the weld, and the contact of the electronic micrometer is displaced in the vertical direction. The electronic micrometer transmits the displacement value of its contact to the computer in real time, and the computer automatically generates the contour curve of the weld based on the collected data.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. The electronic micrometer replaces the traditional welding inspection ruler to significantly improve measurement accuracy; combined with the computer to collect displacement data in real time and automatically generate weld profile curves, it eliminates human reading errors and realizes full-process data automation processing.

[0009] 2. The inverted Z-shaped bracket allows the electronic micrometer contact to contact the pipe wall vertically and pass smoothly through the weld surface, adapting to the varying spatial constraints of internal and external welds. Permanent magnets adhere to the pipe surface, ensuring stable mounting of the device. The slideway is aligned parallel to the pipe axis, ensuring consistent measurement direction and adapting to varying pipe diameters and curvatures.

[0010] 3. The micrometer fine-tuning drives the slider to move slowly along the slideway, realizing the continuous measurement of the weld profile by the electronic micrometer contact. The density of measurement points far exceeds that of manual single-point measurement, and can accurately capture the dynamic changes of subtle dimensions such as weld excess height and undercut.

[0011] 4. No destruction or coating stripping is required during the whole process, and the weld morphology is indirectly reflected through the contact displacement; the micrometer coarse adjustment and differential cylinder knob graded control take into account both fast positioning and fine adjustment, easy to operate and suitable for narrow automatic welding seams.

[0012] 5. Computer-generated contour curves can be directly compared with industry standard parameters (such as excess height limit, width, undercut depth, etc.), providing a quantitative basis for weld quality grading, avoiding subjective judgment bias, and improving the reliability of long-distance pipeline safety assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of measuring the external weld of a pipeline.

[0014] Figure 2 This is a schematic diagram of measuring the internal weld of a pipeline.

[0015] The names of the parts in the accompanying drawings are: 1. Pipe, 2. Permanent magnet, 3. Slide, 4. Slider, 5. Frame, 6. Micrometer, 7. Bracket, 8. Electronic micrometer, 9. Weld. DETAILED DESCRIPTION

[0016] 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 only part of the embodiments of the present invention, rather than all the embodiments.

[0017] like Figure 1-Figure 2As shown, a non-destructive measurement device for the surface profile of a pipeline weld includes a permanent magnet 2, a slideway 3 is fixed to the upper end of the permanent magnet 2, a slider 4 is slidably provided on the slideway 3, one end of the slideway 3 is fixedly connected to a frame 5 of a micrometer 6, a measuring screw of the micrometer 6 is rotatably connected to the slider 4, the other end of the slider 4 is fixedly connected to the upper end of a bracket 7, the bracket 7 is in an inverted Z shape, an electronic micrometer 8 is fixed to the lower end of the bracket 7, and the electronic micrometer 8 is communicatively connected to a computer.

[0018] When non-destructively measuring the surface profile of weld 9 of pipe 1, permanent magnet 2 is attached to pipe 1 on one side of weld 9. At this time, the contact of electronic micrometer 8 contacts the pipe wall of pipe 1. The position of permanent magnet 2 is adjusted so that the sliding direction of slider 4 is parallel to the axial direction of pipe 1. The knob of micrometer 6 is rotated so that the measuring screw drives slider 4, bracket 7, and electronic micrometer 8 close to weld 9. When the contact of electronic micrometer 8 approaches weld 9, electronic micrometer 8 is zeroed and the differential cylinder knob of micrometer 6 is rotated. During the rotation of the differential cylinder knob, the measuring screw drives slider 4, bracket 7, and electronic micrometer 8 to move slowly. As electronic micrometer 8 moves slowly, it is restricted by the surface profile of weld 9, causing the contact of electronic micrometer 8 to displace in the vertical direction. The displacement value of the electronic micrometer 8 is transmitted to the computer in real time, and the computer automatically generates the profile curve of weld 9 based on the collected data.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-destructive measuring device for the surface profile of a pipeline weld, comprising a permanent magnet (2), characterized in that: A slideway (3) is fixed to the upper end of the permanent magnet (2), a slider (4) is slidably provided on the slideway (3), one end of the slideway (3) is fixedly connected to a frame (5) of a micrometer (6), a distance measuring screw of the micrometer (6) is rotatably connected to the slider (4), the other end of the slider (4) is fixedly connected to the upper end of a bracket (7), an electronic micrometer (8) is fixed to the lower end of the bracket (7), and the electronic micrometer (8) is communicatively connected to a computer.

2. The non-destructive measurement device for pipeline weld surface profile according to claim 1, characterized in that: The bracket (7) is in an inverted Z shape.

3. A measurement method for a pipeline weld surface profile non-destructive measurement device according to claim 1, characterized in that: The permanent magnet (2) is adsorbed on the pipe (1) on one side of the weld (9). At this time, the contact of the electronic micrometer (8) contacts the pipe wall of the pipe (1). The position of the permanent magnet (2) is adjusted so that the sliding direction of the slider (4) is parallel to the axial direction of the pipe (1). The knob of the micrometer (6) is turned so that the distance measuring screw drives the slider (4), the bracket (7) and the electronic micrometer (8) close to the weld (9). When the contact of the electronic micrometer (8) is close to the weld (9), the electronic micrometer ( 8) Zero adjustment, turn the differential cylinder knob of the micrometer (6), during the rotation of the differential cylinder knob, the distance measuring screw drives the slider (4), the bracket (7) and the electronic micrometer (8) to move slowly, when the electronic micrometer (8) moves slowly, it is restricted by the surface profile of the weld (9), and the contact of the electronic micrometer (8) is displaced in the vertical direction. The electronic micrometer (8) transmits the displacement value of its contact to the computer in real time, and the computer automatically generates the contour curve of the weld (9) based on the collected data.

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