Laser marker suitable for internal positioning of pressure pipeline and marking method

Abstract

The invention belongs to the technical field of pipeline defect marking, and particularly relates to a laser marker suitable for internal positioning of a pressure pipeline and a marking method of the laser marker. The device mainly comprises a laser lamp, the laser lamp is arranged on a laser lamp guide rail, a wireless control assembly is arranged on the laser lamp guide rail, and the laser lamp is connected with the wireless control assembly. The laser lamp is placed below the welding position of the pressure pipeline, and the laser lamp is controlled by the wireless control assembly to move along the laser lamp guide rail, so that the laser lamp can project all positions of a pipeline welding seam and record the initial position of a defect on the welding seam. Wherein the laser lamp can excite light rays with different colors according to different circumferential welds and longitudinal welds. According to the marker and the marking method, point location data are recorded in a laser projection mode, and the marker and the marking method have the advantages that data are accurate, multiple point locations are recorded, and recorded data are not affected by working conditions of the pressure steel pipe. And for the pressure steel pipe with the diameter of more than 3m, the working procedure of building a scaffold can be omitted.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline defect marking, and in particular relates to a laser marker and a marking method suitable for internal positioning of a pressure pipeline. Background Art

[0002] In the use of large pressure pipelines, non-destructive testing of welds is required regularly. In hydropower stations, the diameter of the pressure steel pipe can reach more than 10m, and non-destructive testing requires the installation of scaffolding to carry out operations. The installation process is costly and time-consuming, and the work safety risk is high and the operation is difficult. Therefore, in order to ensure work safety, reduce costs and reduce cycles, robots are now widely used to automatically perform non-destructive testing on pressure steel pipe welds. In order to meet the re-inspection or repair work after non-destructive testing, the damaged position should be calibrated and recorded, and the marking method should meet the following requirements: (1) Weld defects can be calibrated inside the penstock; (2) The marking is clearly visible and will not cause destructive effects on the inner wall of the penstock; (3) Multiple defects can be marked at the same time; (4) During defect re-inspection, the defect location can be found using the marking points; (5) Not affected by water supply from pressure pipes.

[0003] When performing nondestructive testing with robots, it is not possible to calibrate the defect location well. The location of the defect cannot be accurately determined by photographic positioning. The robot travel recording method cannot guarantee the robot marking accuracy. Traditional talcum powder marking, paint marking, and engraved marking methods all require manual recording at the defect location. In the absence of scaffolding, it is impossible to calibrate high-altitude defects. When small defects that do not need to be repaired are found in pressure pipelines, the defects need to be re-inspected during the next maintenance cycle. At this time, the marking cannot be affected by the working conditions of the pressure pipeline. Therefore, a method that is accurate, fast, and can mark defects for a long time is needed. Summary of the invention

[0004] The present invention provides a laser marker and a marking method suitable for internal positioning of a pressure pipeline, so as to solve the technical problems existing in the prior art that the defect position in the steel pipe cannot be accurately located, the defects need to be marked manually, and the defects at high places in the steel pipe cannot be marked.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A laser marker suitable for internal positioning of a pressure pipeline comprises a laser lamp, the laser lamp is arranged on a laser lamp guide rail, a wireless control component is arranged on the laser lamp guide rail, and the laser lamp is connected to the wireless control component.

[0006] A laser lamp base is arranged at the lower end of the laser lamp, and the laser lamp base is arranged on the laser lamp guide rail. The laser lamp moves on the laser lamp guide rail through the laser lamp base.

[0007] The laser light guide rail is connected with a laser light control module, and the laser light control module is connected with a wireless control component.

[0008] The upper end of the laser light control module is connected to a laser light emitting unit, and the laser light control module controls the opening and closing of the laser light through the laser light emitting unit.

[0009] The bottom of the laser light emitting unit is fixed on the laser light direction rotating base, and the laser light direction rotating base is fixed on the laser light base.

[0010] One side of the laser light guide rail is connected to the rear baffle, and the other side of the laser light guide rail is connected to the front baffle. There is a gap between the rear baffle and the front baffle, and the laser light guide rail is fixed in the gap between the front baffle and the rear baffle.

[0011] The lower end of the rear baffle is connected to a transverse support rod, the transverse support rod is connected to a rotating connection piece, and the rear baffle is rotated around the rotating connection piece through the transverse support rod.

[0012] The lower end of the rotating connecting piece is connected to the axial supporting rod, and the lower end of the axial supporting rod is fixed on the base.

[0013] A laser marking method suitable for internal positioning of a pressure pipeline, wherein a laser lamp is placed below a weld of the pressure pipeline, and the laser lamp is controlled to move along a laser lamp guide rail by a wireless control component, so that the laser lamp can project all positions of the pipeline weld.

[0014] The wireless control component sends a control signal to the laser light control module in the laser light guide rail. The laser light control module receives the control signal and controls the laser light base to move along the laser light guide rail according to the signal. At the same time, the laser light control module controls the laser light direction rotating base to rotate. The light emitted by the laser light emitting unit on the laser light direction rotating base moves to record the starting position and ending position of the defect respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a laser marker suitable for internal positioning of a pressure pipeline. By installing the laser lamp on an adjustable laser lamp guide rail and cooperating with a wireless control component, it is possible to remotely and accurately control the movement of the laser, thereby accurately locating the defect position inside the steel pipe. Compared with traditional manual positioning, this method significantly improves the accuracy of positioning and reduces human errors. By adopting wireless control technology, the marking of defects can be completed without the need for personnel to directly enter the pipeline for operation, which greatly reduces the labor intensity and improves the safety and efficiency of the operation. Automated marking avoids the tediousness and potential safety risks of manual marking, especially in narrow or dangerous pipeline environments. Since the laser lamp can be flexibly moved through the track and remotely controlled by wireless means, it can easily reach and mark even high places or other difficult-to-reach locations inside the steel pipe. This solves the problem that certain defects cannot be marked due to operational limitations in traditional methods, and ensures a comprehensive inspection and recording of defects inside the entire pipeline.

[0016] Furthermore, the design of the laser lamp base allows the laser lamp to move freely on the track, which not only enhances the flexibility of the equipment, but also enables the laser to reach various parts inside the pipeline, improving the comprehensiveness of defect positioning.

[0017] Furthermore, the addition of the laser light control module improves the immediacy and accuracy of laser light operation through direct connection with the wireless control component, ensures rapid response to command transmission, and helps to quickly locate and mark defects.

[0018] Furthermore, the control mechanism of the laser light emitting unit enables the switching of the laser to be precisely controlled, so that the start and end of marking can be more accurately controlled during the detection process, reducing misoperation and improving the accuracy of marking.

[0019] Furthermore, the setting of the laser light direction rotating base allows the laser light to rotate in different directions, which means that even in complex pipeline structures, the laser direction can be flexibly adjusted to effectively mark defects at all angles, increasing the adaptability and accuracy of marking.

[0020] Furthermore, the laser light guide is fixed between the front and rear baffles, which ensures the stability and durability of the laser marker in the pipeline, and maintains good positioning stability even when moving inside the pipeline.

[0021] Furthermore, through the combined design of the rear baffle and the lateral and axial support rods, the rotation and angle adjustment functions of the entire marker are realized, further improving the accessibility and practicality in complex pipeline environments, and is particularly suitable for marking defects that are high or difficult to reach directly.

[0022] Furthermore, the present invention discloses a laser marking method suitable for internal positioning of pressure pipelines. The laser marking method outlines how to use the above-mentioned device to achieve an efficient and accurate pipeline internal defect marking process, significantly improving the automation level of defect positioning, reducing manpower requirements, and improving detection efficiency.

[0023] Furthermore, by precisely controlling the movement of the laser lamp base and the rotation of the laser lamp direction, the location information (start and end) of the defect can be recorded in detail without direct contact, which is crucial for subsequent maintenance decisions and greatly improves the efficiency and quality of defect handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Left view of the laser marker for positioning inside the pressure pipe; Figure 2 : Front view of the laser marker positioned inside the pressure pipe after the front baffle is removed; Figure 3 : Top view of the laser marker positioned inside the pressure pipe.

[0025] Explanation of the numbers: 1. Base; 2. Axial support rod; 3. Rotating connector; 4. Transverse support rod; 5. Rear baffle; 6. Laser light guide rail; 7. Front baffle; 8. Laser light; 9. Wireless control component; 10. Laser light control module; 11. Laser light direction rotating base; 12. Laser light emitting unit; 13. Laser light base. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 , Figure 2 and Figure 3The present invention proposes a laser marker suitable for internal positioning of a pressure pipe. A base 1 is provided at the bottom of the device to ensure the stability of the device. An axial support rod 2 is vertically fixed on the upper end of the base 1. A rotating connector 3 is fixed on the upper end of the axial support rod 2. One end of a transverse support rod 4 is vertically connected to the axial support rod 2 through the rotating connector 3. The other end of the transverse support rod 4 is connected and fixed to the back of a rear baffle 5. The rear baffle 5 in the figure is a circular structure. The transverse support rod 4 is fixed at the center point of the rear baffle 5. A laser light guide rail 6 is fixed on the other side, and the laser light guide rail 6 is also connected to a front baffle 7. The laser light guide rail 6 is between the front baffle 7 and the rear baffle 5. A laser light 8 is arranged on the laser light guide rail 6. The bottom of the laser light 8 is a laser light base 13. The laser light 8 is fixed to the laser light guide rail 6 through the laser light base 13. A laser light direction rotating base 11 is arranged on the upper end of the laser light base 13. A laser light control module 10 is arranged on the laser light direction rotating base 11. The upper end of the laser light control module 10 is connected to a laser light emitting unit 12.

[0029] This embodiment provides a laser marker for internal positioning of a pressure pipe and a marking method thereof, which is suitable for rapid, accurate marking and long-term recording of longitudinal and circumferential weld defects of pressure steel pipes. The specific implementation steps are as follows: First, make sure that all parts of the laser marker are properly assembled and functioning properly. Place the device horizontally at the bottom of the pressure steel pipe to be inspected to ensure that the device is stable. It includes a base 1, an axial support rod 2, a rotating connector 3, a transverse support rod 4, a rear baffle 5, a laser light guide rail 6, a front baffle 7, a laser light 8, a wireless control component 9, a laser light control module 10, a laser light direction rotating base 11, a laser light emitting unit 12 and a laser light base 13, wherein the base 1 is the bottom of the device and is used to stabilize the device, the lower end of the axial support rod 2 is fixed on the base 1, the upper end of the axial support rod 2 is fixed to the rotating connector 3, the transverse support rod 4 is connected to the rotating connector 3, a rear baffle 5 is fixed on the transverse support rod 4, and the inner side surface of the rear baffle 5 is connected and fixed to one side of the laser light guide rail 6. In this embodiment, the laser light guide rail 6 adopts a circular track, a wireless control component 9 is arranged in the circle of the laser light guide rail 6, a laser light base 13 is arranged on the laser light guide rail 6, and the laser light 8 is fixed on the upper end of the laser light base 13. By adjusting the position of the laser light base 13 on the laser light guide rail 6, the laser light moves along the track of the steel pipe ring weld. The laser light 8 includes a laser light direction rotating base 11, a laser light control module 10 is fixed above the laser light direction rotating base 11, a laser light emitting unit 12 is fixed on the laser light control module 10, and a front baffle 7 is connected and fixed to the other side of the laser light guide rail 6. The front baffle 7 has the same shape and structure as the rear baffle 5. The laser light guide rail 6 and the laser light 8 thereon are located between the front baffle 7 and the rear baffle 5.

[0030] During the nondestructive testing process, when the defect detection machine finds a defect in the circumferential weld, the operator fixes the base 1 of the equipment at the bottom of the pressure steel pipe welding point, the wireless control component 9 is wirelessly connected to the terminal device, and the staff sends instructions to the wireless control component 9 through the terminal device. The wireless control component 9 sends a control signal to the laser light control module 10 according to the instruction, and the laser light control module 10 controls the laser light emitting unit 12 to emit laser and excite the laser light 8. The laser light control module 10 controls the laser light base 13 to rotate around the laser light guide rail 6. At the same time, the laser light control module 10 controls the laser light direction rotating base 11 to carry the laser light emitting unit 12 thereon to rotate, so as to ensure that the laser light 8 projects light on the weld. The wireless control component 9 controls the laser light direction rotating base 11 according to the instruction to fine-tune the projection angle of the laser light 8 to ensure that the laser light spot is accurately located at the starting position of the defect, and then repeats the above steps to locate the end position of the defect, and records the starting position coordinates of the defect and the relative change angles of the laser light base 13 and the laser light direction rotating base 11 from the starting position to the end position of the defect.

[0031] Further preferably, the laser light emitting unit 12 on the laser light 8 can excite light of different colors according to the types of defects. This process is a complete process of recording a defect position, and this process can be completed by the applet through wireless control of the wireless control component 9.

[0032] For the longitudinal weld, place the base 1 under the pressure pipe of the longitudinal weld, adjust the laser lamp base 13 and the laser lamp direction rotation base 11 to ensure that the laser lamp 8 projects light in the normal direction of the weld, and repeat the marking steps in the above-mentioned annular weld to record the position information.

[0033] The laser recording operation process can be repeated during the weld inspection process and automatically coded and recorded. For pressure steel pipe welds, the specific weld can be located according to the weld name.

[0034] After the recording is completed, the marked points need to be reproduced. By opening the recorded point file, the laser light base 13 and the laser light direction rotating base 11 will automatically locate to the original position and stimulate the laser light 8, and mark the defect position through laser projection.

[0035] In addition to using a circular track, the present invention can also replace the laser light guide rail 6 in the embodiment with a spherical track formed by a double-switch track, such as Figure 1 As shown in , after removing the front baffle 7 and the rear baffle 5, a circular track is added in the horizontal direction of the laser lamp guide rail 6, and a spherical track can be realized according to the mutual movement between the circular tracks and the movement of the laser lamp base 13.

[0036] The entire process of the above operations can be automatically recorded through the supporting mini-program, including the position information, rotation angle and defect description of the laser light.

[0037] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A laser marker suitable for positioning inside a pressure pipe, characterized in that: The invention comprises a laser light (8), wherein the laser light (8) is arranged on a laser light guide rail (6), a wireless control component (9) is arranged on the laser light guide rail (6), and the laser light (8) is connected to the wireless control component (9).

2. A laser marker for internal positioning of a pressure pipe according to claim 1, characterized in that: A laser lamp base (13) is provided at the lower end of the laser lamp (8); the laser lamp base (13) is arranged on a laser lamp guide rail (6); and the laser lamp (8) moves on the laser lamp guide rail (6) via the laser lamp base (13).

3. A laser marker for internal positioning of a pressure pipe according to claim 2, characterized in that: A laser light control module (10) is connected to the laser light guide rail (6), and the laser light control module (10) is connected to the wireless control component (9).

4. A laser marker for internal positioning of a pressure pipe according to claim 3, characterized in that: The upper end of the laser light control module (10) is connected to a laser light emitting unit (12), and the laser light control module (10) controls the on and off of the laser light (8) via the laser light emitting unit (12).

5. A laser marker for internal positioning of a pressure pipe according to claim 4, characterized in that: The bottom of the laser light emitting unit (12) is fixed on a laser light direction rotating base (11), and the laser light direction rotating base (11) is fixed on a laser light base (13).

6. A laser marker for internal positioning of a pressure pipe according to claim 1, characterized in that: One side of the laser light guide rail (6) is connected to the rear baffle (5), and the other side of the laser light guide rail (6) is connected to the front baffle (7); a gap exists between the rear baffle (5) and the front baffle (7), and the laser light guide rail (6) is fixed in the gap between the front baffle (7) and the rear baffle (5).

7. A laser marker for internal positioning of a pressure pipe according to claim 6, characterized in that: The lower end of the rear baffle (5) is connected to a transverse support rod (4), the transverse support rod (4) is connected to a rotating connection member (3), and the rear baffle (5) is rotated around the rotating connection member (3) through the transverse support rod (4).

8. A laser marker for internal positioning of a pressure pipe according to claim 7, characterized in that: The lower end of the rotating connecting member (3) is connected to the axial support rod (2), and the lower end of the axial support rod (2) is fixed on the base (1).

9. A laser marking method suitable for internal positioning of a pressure pipeline, based on a laser marker suitable for internal positioning of a pressure pipeline as claimed in any one of claims 1 to 8, characterized in that: The laser light (8) is placed below the weld of the pressure pipeline, and the laser light (8) is controlled by a wireless control component (9) to move along the laser light guide rail (6), so that the laser light (8) can project all positions of the pipeline weld.

10. A laser marking method suitable for internal positioning of a pressure pipeline according to claim 9, characterized in that: The wireless control component (9) sends a control signal to the laser light control module (10) in the laser light guide rail (6). The laser light control module (10) receives the control signal and controls the laser light base (13) to move along the laser light guide rail (6) according to the signal. At the same time, the laser light control module (10) controls the laser light direction rotating base (11) to rotate. The light emitted by the laser light emitting unit (12) on the laser light direction rotating base (11) moves to respectively record the starting position and the ending position of the defect.

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