Adjustable large-diameter pipeline roundness correction tool

Abstract

An adjustable roundness correction tool for a large-diameter pipeline comprises a base provided with a pipeline bearing part; the guide rail extends in the axial direction of the pipeline and is fixed on the base; the sliding block is arranged on the guide rail in a sliding manner; the fixed plate is vertically arranged at one end of the base; the first linear driving mechanism is fixed to the side, facing the pipeline bearing part, of the fixing plate; the vertical plate is fixed to the top of the sliding block and connected with the movable end of the first linear driving mechanism. The driving motor is mounted at the top of the vertical plate; the rotating shaft is rotatably supported on the vertical plate and is in transmission connection with the driving motor; the radial driving mechanisms are distributed in the circumferential direction and are arranged at the end part of the rotating shaft; the device is novel in structure and accurate in detection, the distance measuring unit comprises a plurality of non-contact distance sensors symmetrically arranged in the circumferential direction of the rotating shaft, the distance between the inner wall of the pipeline and the rotating shaft can be detected in real time, and a data basis is provided for follow-up accurate control.

Description

Technical Field

[0001] This utility model relates to a calibration fixture, specifically an adjustable large-diameter pipe roundness calibration fixture. Background Technology

[0002] In the field of pipeline engineering, large-diameter pipelines are widely used, covering key areas such as oil and natural gas transportation, urban water supply and drainage systems, and large industrial facilities. However, large-diameter pipelines are prone to roundness deviations during manufacturing, transportation, storage, installation, and use.

[0003] From a manufacturing perspective, large-diameter pipes are difficult to ensure ideal roundness during the forming process due to limitations in process precision, equipment performance, and raw material characteristics. For example, in the plate rolling and welding process, poor rolling precision of the plate and uneven thermal stress generated during welding can both lead to deviations in pipe roundness. During transportation and storage, large-diameter pipes are bulky and heavy. If the transportation vehicle lacks stable support or the storage site is uneven, the pipes are prone to deformation under gravity, thus affecting roundness. During installation, improper operation by construction personnel, such as forcibly assembling pipes during connection, will additionally increase internal stress in the pipes, causing changes in roundness.

[0004] Roundness deviations can lead to numerous adverse consequences. In fluid transportation, poorly round pipes significantly increase flow resistance, resulting in a substantial decrease in transportation efficiency and a sharp rise in energy consumption. For example, in long-distance oil pipelines, energy consumption can increase several times over for every certain percentage increase in roundness deviation, drastically raising operating costs. Furthermore, uneven roundness causes imbalances in internal pressure distribution, accelerating localized corrosion and seriously threatening pipeline lifespan and safety. In pipeline connections, roundness deviations make docking difficult, compromising sealing and increasing the risk of leaks, which can have catastrophic consequences, especially in scenarios involving the transportation of flammable and explosive media.

[0005] Existing pipe roundness correction technologies have many limitations. Traditional manual correction methods rely mainly on human experience to operate simple tools such as jacks and crowbars, which is not only extremely inefficient but also difficult to guarantee accuracy. They are often inadequate for the complex deformations of large-diameter pipes. Some simple mechanical correction equipment has a basic design but lacks precise detection and control methods, making it impossible to accurately correct deformations in different parts of the pipe, resulting in inconsistent correction effects. While automated correction equipment has seen some development, it generally suffers from poor versatility, being only applicable to pipes of specific specifications and materials, failing to meet diverse engineering needs. Furthermore, the high cost and maintenance difficulty limit its widespread application. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides an adjustable large-diameter pipe roundness correction tool, which effectively solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes:

[0008] The base has a pipe support section on it;

[0009] The guide rail is fixed to the base, extending along the axial direction of the pipe;

[0010] The slider is slidably mounted on the guide rail;

[0011] A fixing plate is vertically installed at one end of the base;

[0012] The first linear drive mechanism is fixed to the side of the fixed plate facing the pipe bearing part;

[0013] A vertical plate is fixed to the top of the slider and connected to the movable end of the first linear drive mechanism;

[0014] The drive motor is mounted on the top of the vertical plate;

[0015] The rotating shaft is rotatably supported on the vertical plate and is connected to the drive motor for transmission.

[0016] Multiple circumferentially distributed radial drive mechanisms are located at the ends of the rotating shaft;

[0017] Correction rollers are located at the movable ends of each radial drive mechanism;

[0018] The ranging unit is mounted on the rotating shaft and located on both sides of the radial drive mechanism;

[0019] as well as

[0020] The control system is configured to control the coordinated action of the first linear drive mechanism, the radial drive mechanism, and the drive motor based on the detection signal from the ranging unit.

[0021] Preferably, the pipe bearing portion includes an arc-shaped support block whose curvature matches the outer diameter of the pipe to be corrected.

[0022] Preferably, the radial drive mechanism is a hydraulic cylinder or an electric push rod, and the stroke direction of its moving end is parallel to the radial direction of the rotating shaft.

[0023] Preferably, the ranging unit includes a plurality of non-contact distance sensors symmetrically arranged circumferentially on the axis of rotation.

[0024] Preferably, the control system includes:

[0025] The data acquisition module acquires the detection data from the ranging units on both sides in real time;

[0026] The motion control module adjusts the extension amount of the radial drive mechanism based on the difference in detection data;

[0027] The path planning module controls the coordinated feed of the first linear drive mechanism and the drive motor.

[0028] Preferably, the surface of the correction roller is provided with a progressive embossing structure, and its working surface is deflected at a 5-15° angle to the axis of rotation.

[0029] Beneficial effects: Precise detection: The ranging unit includes multiple non-contact distance sensors symmetrically arranged around the circumference of the rotating shaft, which can detect the distance between the inner wall of the pipe and the rotating shaft in real time, providing a data basis for subsequent precise control.

[0030] Precise calibration: The motion control module adjusts the extension of the radial drive mechanism according to the difference in detection data, and adjusts the pressure of the calibration roller on the inner wall of the pipe to achieve precise calibration of the pipe roundness; the progressive embossing structure on the surface of the calibration roller and the special design of the working surface being deflected at a 5-15° angle to the axis of rotation make it more effective in applying pressure to the inner wall of the pipe.

[0031] Comprehensive calibration: The path planning module controls the first linear drive mechanism and the drive motor to feed together, so that the calibration roller can perform comprehensive calibration of the inner wall of the pipe according to the predetermined path, ensuring that the roundness of the entire pipe meets the requirements.

[0032] Automated collaborative operation: The data acquisition module, motion control module, and path planning module work together to achieve precise movement and pressure application of the correction roller on the inner wall of the pipe, completing the automated correction of the roundness of large-diameter pipes; at the same time, the ranging unit can collect the distance before and after correction for comparison. If it does not meet the requirements, the correction steps can be repeated to ensure the correction effect. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0035] Figure 2 This is a two-dimensional structural schematic diagram of the present invention from a second perspective;

[0036] Figure 3 This is a three-dimensional structural diagram of the present invention from a third-person perspective;

[0037] The following are the labels in the diagram: 1. Base; 2. Arc-shaped support block; 3. Guide rail; 4. Slider; 5. Fixing plate; 6. First linear drive mechanism; 7. Vertical plate; 8. Drive motor; 9. Rotating shaft; 10. Radial drive mechanism; 11. Correction roller; 12. Distance measuring unit. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-3 The specific embodiments of this utility model will be described in further detail.

[0039] Example 1, by Figure 1-3 This utility model provides an adjustable roundness correction fixture for large-diameter pipes, comprising:

[0040] Base 1, on which a pipe support is provided;

[0041] Guide rail 3 is fixed to base 1 along the axial direction of the pipe;

[0042] Slider 4 is slidably mounted on guide rail 3;

[0043] The fixing plate 5 is vertically mounted on one end of the base 1;

[0044] The first linear drive mechanism 6 is fixed to the side of the fixed plate 5 facing the pipe bearing part;

[0045] The vertical plate 7 is fixed to the top of the slider 4 and connected to the movable end of the first linear drive mechanism 6;

[0046] Drive motor 8 is mounted on the top of vertical plate 7;

[0047] The rotating shaft 9 is rotatably supported on the vertical plate 7 and is connected to the drive motor 8 for transmission.

[0048] Multiple radially driven mechanisms 10 distributed circumferentially are disposed at the ends of the rotating shaft 9;

[0049] Correction rollers 11 are located at the movable ends of each radial drive mechanism 10;

[0050] The ranging unit 12 is mounted on the rotating shaft 9 and located on both sides of the radial drive mechanism 10;

[0051] as well as

[0052] The control system is configured to control the coordinated operation of the first linear drive mechanism 6, the radial drive mechanism 10, and the drive motor 8 based on the detection signal from the ranging unit 12.

[0053] Base 1: As the basic support component of the entire tooling, it is equipped with a pipe support section for placing the pipe to be corrected.

[0054] Arc-shaped bearing block 2: It is part of the pipe bearing section. Its curvature matches the outer diameter of the pipe to be corrected, which can provide stable support for the pipe and ensure the stability of the pipe during the correction process. Clamping fixtures for fixing the pipe are installed on it.

[0055] Guide rail 3: Extends along the pipe axis and is fixed on the base 1, providing a sliding track for slider 4, ensuring that slider 4 can move smoothly along the pipe axis.

[0056] Slider 4: It is slidably mounted on the guide rail 3 and can slide freely on the guide rail 3, thereby driving the vertical plate 7 and other components connected to it to move together.

[0057] Fixing plate 5: Vertically set at one end of base 1, used to fix the first linear drive mechanism 6.

[0058] The first linear drive mechanism 6 is fixed to the side of the fixed plate 5 facing the pipe bearing part, and its movable end is connected to the vertical plate 7, which is used to drive the vertical plate 7 to move linearly along the guide rail 3.

[0059] Vertical plate 7: Fixed to the top of slider 4, connected to the movable end of the first linear drive mechanism 6, providing support for drive motor 8 and rotating shaft 9.

[0060] Drive motor 8: Installed on the top of the vertical plate 7, and connected to the rotating shaft 9 for driving the rotating shaft 9 to rotate.

[0061] Rotating shaft 9: Rotatably supported on vertical plate 7, connected to drive motor 8, and has multiple circumferentially distributed radial drive mechanisms 10 at its end.

[0062] Radial drive mechanism 10: Located at the end of the rotating shaft 9, multiple radial drive mechanisms 10 are circumferentially distributed. The stroke direction of its moving end is parallel to the radial direction of the rotating shaft 9, and it can be a hydraulic cylinder or an electric push rod, used to drive the correction roller 11 to perform radial movement.

[0063] Correction roller 11: Located at the movable end of each radial drive mechanism 10, with a progressive embossed structure on its surface. Its working surface is deflected at a 5-15° angle to the axis of the rotating shaft 9, and is used to correct the roundness of the inner wall of the pipe.

[0064] Distance measuring unit 12: It is set on the rotating shaft 9 and located on both sides of the radial drive mechanism 10. It includes multiple non-contact distance sensors symmetrically arranged around the rotating shaft 9 for real-time detection of the distance between the inner wall of the pipe and the rotating shaft 9.

[0065] (II) Control System Section

[0066] Data acquisition module: acquires the detection data of the two-sided ranging units 12 in real time, providing a data basis for subsequent control operations.

[0067] Motion control module: Adjusts the extension of the radial drive mechanism 10 according to the difference in detection data, thereby adjusting the pressure of the correction roller 11 on the inner wall of the pipe to achieve precise correction of the pipe roundness.

[0068] Path planning module: controls the linkage feed of the first linear drive mechanism 6 and the drive motor 8, so that the correction roller 11 can perform comprehensive correction of the inner wall of the pipe according to the predetermined path;

[0069] The data acquisition module is electrically connected to the motion control module, and the motion control module is electrically connected to the path planning module.

[0070] Workflow: 1. Place the large-diameter pipe to be calibrated on the pipe support part of the base 1. Utilize the curvature of the arc-shaped support block 2, which matches the outer diameter of the pipe, to provide stable support for the pipe. The clamping fixture on the arc-shaped support block 2 fixes the pipe in place, preventing displacement during the calibration process and ensuring the stability and accuracy of the calibration work (this is existing technology).

[0071] II. Testing Equipment

[0072] Multiple non-contact distance sensors in the ranging unit 12 are symmetrically arranged around the rotating shaft 9. Before calibration begins, the sensors continuously detect the distance between the inner wall of the pipe and the rotating shaft 9 and transmit the detected data to the data acquisition module of the control system. After acquiring this data, the data acquisition module provides the data basis for subsequent control operations.

[0073] III. Roundness Correction

[0074] (a) Radial pressure adjustment

[0075] The motion control module analyzes the detection data acquired by the data acquisition module and calculates the deviation values ​​of the pipe's inner wall at different positions from the ideal roundness. Based on these detection data differences, the motion control module sends a command to the radial drive mechanism 10 to adjust the extension amount of the radial drive mechanism 10. The radial drive mechanism 10 uses a hydraulic cylinder or electric push rod, and by changing the extension length of its movable end, it drives the correction roller 11 to perform radial movement, adjusting the pressure of the correction roller 11 on the inner wall of the pipe. The surface of the correction roller 11 has a progressive embossed structure, and its working surface is deflected at a 5-15° angle to the axis of the rotating shaft 9. This special design allows the correction roller 11 to more effectively apply pressure to the inner wall of the pipe, achieving precise correction of the pipe's roundness.

[0076] (ii) Rotation correction

[0077] The drive motor 8 is mounted on the top of the vertical plate 7 and is connected to the rotating shaft 9 for transmission. After the motion control module adjusts the pressure of the correction rollers 11, the path planning module controls the drive motor 8 to start, and the drive motor 8 drives the rotating shaft 9 to rotate. The multiple correction rollers 11 distributed circumferentially at the end of the rotating shaft 9 rotate together to correct the roundness of the inner wall of the pipe in the circumferential direction.

[0078] IV. Axial Movement Correction

[0079] The path planning module controls the first linear drive mechanism 6 and the drive motor 8 to feed in tandem. The first linear drive mechanism 6 is fixed to the side of the fixed plate 5 facing the pipe bearing part, and its movable end is connected to the vertical plate 7. When the first linear drive mechanism 6 is started, it drives the vertical plate 7, drive motor 8, rotating shaft 9, radial drive mechanism 10, and correction roller 11 to move linearly along the guide rail 3. During the axial movement, the correction roller 11 performs comprehensive correction of the inner wall of the pipe according to a predetermined path to ensure that the roundness of the entire pipe meets the requirements.

[0080] V. Coordinated Operation of the Control System

[0081] The data acquisition module, motion control module, and path planning module work together to complete the pipe roundness correction. The data acquisition module transmits real-time detection data to the motion control module, which adjusts the pressure based on the data and feeds back the adjustment information to the path planning module. Based on this information, the path planning module controls the coordinated action of the first linear drive mechanism 6 and the drive motor 8 to achieve precise movement and pressure application of the correction roller 11 on the inner wall of the pipe, thereby completing the automated correction of the roundness of the large-diameter pipe. The distance measuring units 12 installed on both sides of the drive mechanism 10 collect the distance before and after correction, respectively, for comparison. If the corrected pipe diameter still does not meet the requirements, the first linear drive mechanism 6 returns to repeat the above correction steps.

[0082] Beneficial effects: Precise detection: The ranging unit includes multiple non-contact distance sensors symmetrically arranged around the circumference of the rotating shaft, which can detect the distance between the inner wall of the pipe and the rotating shaft in real time, providing a data basis for subsequent precise control.

[0083] Precise calibration: The motion control module adjusts the extension of the radial drive mechanism according to the difference in detection data, and adjusts the pressure of the calibration roller on the inner wall of the pipe to achieve precise calibration of the pipe roundness; the progressive embossing structure on the surface of the calibration roller and the special design of the working surface being deflected at a 5-15° angle to the axis of rotation make it more effective in applying pressure to the inner wall of the pipe.

[0084] Comprehensive calibration: The path planning module controls the first linear drive mechanism and the drive motor to feed together, so that the calibration roller can perform comprehensive calibration of the inner wall of the pipe according to the predetermined path, ensuring that the roundness of the entire pipe meets the requirements.

[0085] Automated collaborative operation: The data acquisition module, motion control module, and path planning module work together to achieve precise movement and pressure application of the correction roller on the inner wall of the pipe, completing the automated correction of the roundness of large-diameter pipes; at the same time, the ranging unit can collect the distance before and after correction for comparison. If it does not meet the requirements, the correction steps can be repeated to ensure the correction effect.

[0086] Flexible movement: The guide rail provides a sliding track for the slider, ensuring that the slider can move smoothly along the pipe axis, thereby driving the connected components to move, allowing the tooling to be flexibly adjusted in the pipe axial direction.

[0087] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable large-diameter pipe roundness correction fixture, characterized in that, include: The base (1) is provided with a pipe support; The guide rail (3) is fixed to the base (1) along the axial direction of the pipe; The slider (4) is slidably mounted on the guide rail (3); A fixing plate (5) is vertically mounted on one end of the base (1); The first linear drive mechanism (6) is fixed to the side of the fixed plate (5) facing the pipe bearing part; The vertical plate (7) is fixed to the top of the slider (4) and connected to the movable end of the first linear drive mechanism (6); The drive motor (8) is installed on the top of the vertical plate (7); The rotating shaft (9) is rotatably supported on the vertical plate (7) and is connected to the drive motor (8) for transmission. Multiple radially driven mechanisms (10) distributed circumferentially are disposed at the end of the rotating shaft (9); The correction roller (11) is located at the movable end of each radial drive mechanism (10); The ranging unit (12) is mounted on the rotating shaft (9) and located on both sides of the radial drive mechanism (10); as well as The control system is configured to control the coordinated action of the first linear drive mechanism (6), the radial drive mechanism (10) and the drive motor (8) based on the detection signal of the ranging unit (12).

2. The adjustable large-diameter pipe roundness correction fixture according to claim 1, characterized in that: The pipe bearing part includes an arc-shaped support block (2), the curvature of which matches the outer diameter of the pipe to be corrected.

3. The adjustable large-diameter pipe roundness correction fixture according to claim 2, characterized in that: The radial drive mechanism (10) is a hydraulic cylinder or an electric push rod, and the stroke direction of its moving end is parallel to the radial direction of the rotating shaft (9).

4. The adjustable large-diameter pipe roundness correction fixture according to claim 1, characterized in that: The ranging unit (12) includes a plurality of non-contact distance sensors symmetrically arranged around the circumference of the rotating shaft (9).

5. The adjustable large-diameter pipe roundness correction fixture according to claim 4, characterized in that: The control system includes: The data acquisition module acquires the detection data of the two-sided ranging units (12) in real time; The motion control module adjusts the extension amount of the radial drive mechanism (10) based on the difference in detection data; The path planning module controls the linkage feed of the first linear drive mechanism (6) and the drive motor (8).

6. The adjustable large-diameter pipe roundness correction fixture according to claim 5, characterized in that: The surface of the correction roller (11) is provided with a progressive embossing structure, and its working surface is deflected at a 5-15° angle to the axis of the rotating shaft (9).

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