Composite self-adapting variable-diameter supporting wheel mechanism for pipeline detection

Abstract

The utility model discloses a compound self -adaptation variable -diameter support wheel mechanism for pipeline detection, include: base, elastic component, fork rod and odometer wheel, fork rod is opposite with base sliding arrangement, and is connected through elastic component, odometer wheel sets up at the one end of fork rod away from base, the utility model discloses discarded complex electric control system, first to adopt the passive self -adaptation principle of pure machinery, make the core driving force of mechanism direct source from the mutual action between the inner wall of pipeline and support wheel, through the simple elastic element of spring, the mechanical energy of pipe diameter change and barrier impact is directly converted into the adaptability and the obstacle -crossing action of mechanism, realized from the need intelligent control to the leap of being born with mechanical intelligence, fundamentally simplified the structure, eliminated control delay to the stability under the harsh working condition of great improvement.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline inspection devices, and more specifically to a composite adaptive variable diameter support wheel mechanism for pipeline inspection. Background Technology

[0002] Pipeline detection devices need to adapt to complex and variable pipe diameter environments. Traditional pipe diameter changing technologies mostly employ active pipe diameter changing mechanisms, which use sensors to detect pipe diameter or obstacle signals, process them through a controller, and then drive a transmission mechanism such as a motor, worm gear, or lead screw to perform the action. However, active pipe diameter changing mechanisms suffer from problems such as complex structure, response delay, and high reliability risks in the harsh electromagnetic interference environment inside pipelines.

[0003] Therefore, how to provide a composite adaptive variable diameter support wheel mechanism for pipeline inspection that has a simple structure and can better cope with the harsh working conditions inside pipelines is one of the technical problems that urgently need to be solved in this field. Utility Model Content

[0004] In view of this, the present invention provides a composite adaptive variable diameter support wheel mechanism for pipeline inspection, the purpose of which is to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A composite adaptive variable diameter support wheel mechanism for pipeline inspection includes: a base, an elastic component, a fork, and a mileage wheel; the fork is slidably disposed relative to the base and connected through the elastic component; the mileage wheel is disposed at the end of the fork away from the base.

[0006] The elastic component includes a spring and a guide rod; a guide groove is provided on one side of the base; a guide plate is provided at one end of the fork near the base; the guide plate is slidably connected in the guide groove; a guide hole is provided on the side of the guide groove away from the fork; one end of the guide rod is slidably connected in the guide hole, and the other end of the guide rod is fixedly connected to the side of the guide plate away from the fork; the spring is sleeved on the outside of the guide rod; one end of the spring abuts against the side of the guide plate away from the fork, and the other end of the spring abuts against the side of the guide groove away from the guide plate.

[0007] The guide groove has symmetrically arranged limiting blocks on both sides of its inner wall for limiting the guide plate; the limiting blocks are located on the side of the guide groove closer to the mileage wheel; the limiting blocks have symmetrically arranged limiting strips on both sides for limiting the guide plate.

[0008] The fork has a mounting groove at the end away from the base; the odometer wheel is rotatably connected to the mounting groove.

[0009] A pin is rotatably connected within the mounting groove; the odometer wheel is fixedly sleeved on the outside of the pin.

[0010] The present invention achieves the following technical advantages over the prior art: 1) This utility model abandons the complex electronic control system and pioneers the use of a purely mechanical passive adaptive principle, so that the core driving force of the mechanism comes directly from the interaction force between the inner wall of the pipe and the support wheel. Through the simple elastic element of the spring, the mechanical energy of pipe diameter change and obstacle impact is directly converted into the adaptability and obstacle crossing action of the mechanism, realizing the leap from requiring intelligent control to having inherent mechanical intelligence, fundamentally simplifying the structure, eliminating control delay, and greatly improving stability under harsh working conditions.

[0011] 2) This utility model innovatively integrates the two key functions of adaptive diameter change and passive obstacle crossing into the actuator composed of spring, guide rod, fork and mileage wheel, which realizes the ultimate simplification of structure. The entire mechanism is composed of only a few standard mechanical parts, and has the outstanding advantages of modularity, lightweight and compactness.

[0012] 3) This utility model achieves a pipe diameter self-adaptation capability of ±50mm and an obstacle crossing height of ≥50mm, with a faster response speed, more stable operation, and more convenient maintenance. Attached Figure Description

[0013] Figure 1 This is an isometric view of a composite adaptive variable diameter support wheel mechanism for pipeline inspection according to this utility model; Figure 2 This is a cross-sectional view of a composite adaptive variable diameter support wheel mechanism for pipeline inspection according to the present invention. Figure 3 This is a schematic diagram of the base structure; Figure 4 This is a schematic diagram of the fork mechanism; In the diagram: 1. Base; 2. Fork; 3. Mileage wheel; 4. Spring; 5. Guide rod; 6. Guide plate; 7. Guide groove; 8. Guide hole; 9. Limit block; 10. Limit strip; 11. Mounting groove; 12. Pin. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example

[0016] Reference Figure 1-4 As shown, this utility model discloses a composite adaptive variable diameter support wheel mechanism for pipeline inspection, including: a base 1, an elastic component, a fork 2, and a mileage wheel 3; the fork 2 is slidably disposed relative to the base 1 and connected by the elastic component; the mileage wheel 3 is disposed at the end of the fork 2 away from the base 1; before use, multiple of these mechanisms are evenly arranged around the circumference of the main body of the inspection device via the base 1; during use, the inspection device is placed inside the pipeline to be inspected. When the pipe diameter changes, the mileage wheel 3 is driven to move radially by the extension and retraction of the elastic component to maintain contact with the inner wall of the pipeline. When encountering an axial obstacle, the compression of the elastic component on the same side provides the mileage wheel 3 with the ability to lift and overcome the obstacle. During this process, the elastic component is always in a compressed state to provide a continuous radial preload.

[0017] The above-mentioned technical solution directly converts the mechanical energy of pipe diameter changes and obstacle impacts into the adaptability and obstacle-crossing action of the mechanism through elastic components. This transformation realizes the leap from requiring intelligent control to having inherent mechanical intelligence, fundamentally simplifying the structure, eliminating control delay, and greatly improving stability under harsh working conditions.

[0018] In this embodiment, the elastic component includes a spring 4 and a guide rod 5; a guide groove 7 is provided on the lower side of the base 1; a guide plate 6 is provided at one end of the fork 2 near the base 1; the guide plate 6 is slidably connected in the guide groove 7; a guide hole 8 is provided on the side of the guide groove 7 away from the fork 2; one end of the guide rod 5 is slidably connected in the guide hole 8, and the other end of the guide rod 5 is fixedly connected to the side of the guide plate 6 away from the fork 2; the spring 4 is sleeved on the outside of the guide rod 5; one end of the spring 4 abuts against the side of the guide plate 6 away from the fork 2, and the other end of the spring 4 abuts against the side of the guide groove 7 away from the guide plate 6.

[0019] The above technical solution uses a combination of spring and guide rod. On the one hand, it can play a pre-tightening role, so that the odometer wheel is in close contact with the inner wall of the pipe, which enhances the stability of the detection device. On the other hand, the spring can solve the problem that the detection device cannot pass through when the pipe diameter suddenly decreases during the operation of the odometer wheel. It can adapt to the fluctuation of the inner diameter of the pipe and increase the adaptability of the detection device to the pipe.

[0020] In this embodiment, limiting blocks 9 are symmetrically provided on the inner walls of the left and right sides of the guide groove 7 to limit the guide plate 6; the limiting blocks 9 are located on the side of the guide groove 7 near the mileage wheel 3; limiting strips 10 are symmetrically provided on the front and rear sides of the limiting blocks 9 to limit the guide plate 6; the limiting blocks and limiting strips limit the guide plate 6 to prevent the guide plate from leaving the guide groove and improve the stability of the guide plate movement.

[0021] In this embodiment, the fork 2 has a mounting groove 11 at the end away from the base 1; the odometer wheel 3 is rotatably connected to the mounting groove 11.

[0022] In this embodiment, a pin 12 is rotatably connected in the mounting groove 11; the odometer wheel 3 is fixedly sleeved on the outside of the pin 12.

[0023] In this embodiment, the guide rod 5 is threaded onto the guide plate 6.

[0024] In this embodiment, the guide plate 6 and the fork 2 are an integral structure.

[0025] In this embodiment, the limiting block 9 and the base 1 are an integral structure.

[0026] This invention is applicable to a magnetic flux leakage detection robot for large-diameter oil pipelines, and is particularly suitable for ensuring stable contact between magnetization components (such as steel brushes) and the inner wall of the pipeline.

[0027] Working principle: 1. Adaptive diameter change process When the detection device enters the area where the pipe diameter increases: the spring 4 pushes the mileage wheel 3 to extend outward, maintaining close contact with the inner wall of the pipe. The preload of the spring 4 ensures that the mileage wheel 3 always fits against the inner wall of the pipe, avoiding vibration or detachment caused by gaps.

[0028] When the detection platform enters the area where the pipe diameter decreases: the inner wall of the pipe applies inward pressure to the mileage wheel 3, compressing the spring 4, causing the mileage wheel 3 to contract inward, reducing the overall diameter of the platform, and allowing it to pass through the narrow section smoothly.

[0029] 2. Obstacle crossing process

[0030] When encountering protruding obstacles (such as welds or deposits): the obstacle exerts an upward force on the mileage wheel 3, the spring 4 is compressed, the mileage wheel 3 is temporarily lifted, the overall height of the platform remains unchanged, but the mileage wheel 3 can partially avoid the obstacle, and the spring 4 returns to its original state after passing the obstacle.

[0031] 3. When encountering dents or localized corrosion: Spring 4 pushes the mileage wheel 3 to keep it in contact with the inner wall of the pipe, avoiding detection failure due to local dents.

[0032] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A composite adaptive variable diameter support wheel mechanism for pipeline inspection, characterized in that, include: The base (1), elastic component, fork (2) and odometer wheel (3); the fork (2) is slidably disposed relative to the base (1) and connected to it through the elastic component; the odometer wheel (3) is disposed at the end of the fork (2) away from the base (1).

2. The composite adaptive variable diameter support wheel mechanism for pipeline inspection according to claim 1, characterized in that, The elastic component includes a spring (4) and a guide rod (5); a guide groove (7) is provided on one side of the base (1); a guide plate (6) is provided at one end of the fork (2) near the base (1); the guide plate (6) is slidably connected in the guide groove (7); a guide hole (8) is provided on the side of the guide groove (7) away from the fork (2); one end of the guide rod (5) is slidably connected in the guide hole (8), and the other end of the guide rod (5) is fixedly connected to the side of the guide plate (6) away from the fork (2); the spring (4) is sleeved on the outside of the guide rod (5); one end of the spring (4) abuts against the side of the guide plate (6) away from the fork (2), and the other end of the spring (4) abuts against the side of the guide groove (7) away from the guide plate (6).

3. The composite adaptive variable diameter support wheel mechanism for pipeline inspection according to claim 2, characterized in that, The guide groove (7) is symmetrically provided with limiting blocks (9) on both sides of the inner wall for limiting the guide plate (6); the limiting blocks (9) are located on the side of the guide groove (7) close to the mileage wheel (3); the limiting blocks (9) are symmetrically provided with limiting strips (10) on both sides of the limiting blocks (9) for limiting the guide plate (6).

4. The composite adaptive variable diameter support wheel mechanism for pipeline inspection according to claim 1, characterized in that, The fork (2) has an installation groove (11) at the end away from the base (1); the mileage wheel (3) is rotatably connected to the installation groove (11).

5. A composite adaptive variable diameter support wheel mechanism for pipeline inspection according to claim 4, characterized in that, A pin (12) is rotatably connected inside the mounting groove (11); the mileage wheel (3) is fixedly sleeved on the outside of the pin (12).

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