Radiographic mobile support for pipes

Abstract

The application discloses a pipeline radiation flaw detection mobile support, relates to the field of pipeline flaw detection, and comprises a support body moving in the pipeline, the outer surface of the support body is provided with a opening mechanism for supporting the support, and the two sides of the support body are provided with auxiliary mechanisms for controlling the opening and closing degree of the supporting rod. The application utilizes external force (such as manual operation) to make the supporting rod rotate around the rotating connection point of the supporting rod and the sliding groove one, the auxiliary wheel moves outward, thereby supporting the support body, the position of the moving column can be fixed by inserting the plug pin in the insertion hole at different positions, the rotating angle of the supporting rod is fixed, the opening degree of the support is adjusted and fixed, different pipe diameters can be adapted, a more stable structure is formed by the baffle, the supporting rod and the support body, the overall rigidity of the support is enhanced, the support is less likely to be deformed when bearing external force, and the supporting capacity and stability of the support in the pipeline are improved.

Description

Technical Field

[0001] This application relates to the field of pipeline flaw detection, and in particular to a mobile support for pipeline radiographic flaw detection. Background Technology

[0002] Pipeline radiographic testing mobile supports are used for defect inspection and repair of various pipelines such as natural gas pipelines, oil pipelines, urban water supply and drainage pipelines, and tap water pipelines. Typically, the radiographic testing device is installed as an integrated unit with the pipeline mobile support. The mobile support carries the automatic pipeline radiographic testing device to conduct inspections inside the pipeline in a mobile manner, eliminating the need for manual entry for inspection. This method is highly efficient and also protects people's lives.

[0003] When existing X-ray flaw detectors use a traction crawler, the trolley carrying the X-ray flaw detector is first connected to the traction crawler. The traction crawler, along with the trolley, is then placed inside the pipe. The traction crawler is then controlled to move forward, and the X-ray flaw detector will inspect for defects on the pipe along its path. To ensure the accuracy of the inspection and the safety of the equipment, a stabilizing device needs to be installed on the traction crawler to ensure that it remains in contact with the pipe wall at all times. This prevents the traction crawler from tipping over and being left inside the pipe. Traditional traction crawlers for X-ray flaw detectors have a simple structure and non-adjustable mechanism, making them unsuitable for pipes of various diameters. Different traction crawlers need to be replaced when inspecting pipes of different diameters, which is quite troublesome. Utility Model Content

[0004] To address the issue that mobile supports cannot adapt to pipes of various diameters, this application provides a mobile support for radiographic testing of pipes.

[0005] The technical solution provided in this application for a mobile support for radiographic testing of pipelines is as follows:

[0006] A movable support for radiographic testing of pipelines includes a support body that moves inside the pipeline.

[0007] The outer surface of the support body is provided with a support mechanism for opening the support.

[0008] Both sides of the bracket body are equipped with auxiliary mechanisms for controlling the opening and closing degree of the support rod.

[0009] By adopting the above technical solution, the support body is used to connect to the radiographic flaw detector so that flaw detection can be performed inside the pipeline when the support moves. The spreading mechanism is used to spread the support rod to adapt to pipelines of different diameters. Whether the pipeline is large or small, the spreading mechanism can effectively support the pipeline by adjusting its own state. The auxiliary mechanism is used to form a more stable structure between the support rod and the support body. This structure can enhance the overall rigidity of the support and make it less prone to deformation when subjected to external forces, thereby improving the support capacity and stability of the support inside the pipeline.

[0010] Preferably, the spreading mechanism includes a first sliding groove and a second sliding groove circumferentially formed on both sides of the support body and connected to each other. A support rod is rotatably connected inside the first sliding groove, and an auxiliary wheel is rotatably connected to the end of the support rod away from the support body. A torsion spring is fixed between the support rod and the inner wall of the support body.

[0011] By adopting the above technical solution, the slide groove provides rotation space for the support rod, allowing the support rod to rotate freely within the slide groove, thereby realizing the actions of opening and closing. The support rod changes the opening and closing degree of the bracket by rotating, providing support for the pipeline. When the bracket is opened, the auxiliary wheel contacts the pipeline surface, increasing the contact area with the pipeline, making the support move more smoothly on the pipeline, while reducing damage to the pipeline surface. When the bracket is closed, the torsion spring is twisted to store energy; when it is necessary to open the bracket, the torsion spring releases energy, pushing the support rod to rotate, assisting the bracket to open, making the operation more labor-saving.

[0012] Preferably, a gear is fixedly connected to the side of the support rod away from the torsion spring and inside the first slide groove, and the gear is rotatably connected inside the bracket body. A rack that meshes with the gear is slidably connected inside the first slide groove, and a connecting rod that is slidably adapted to the second slide groove is fixedly connected to the bottom surface of the rack.

[0013] By adopting the above technical solution, when the rack moves, the support rod is driven to rotate through the transmission action of the gear, thereby controlling the opening and closing degree of the bracket. The connecting rod transmits the movement of the rack to the moving column, so that the moving column can move synchronously.

[0014] Preferably, auxiliary cylinders are fixedly connected to both ends of the support body, and a movable column fixed to the connecting rod passes through the middle of the auxiliary cylinder and the support body.

[0015] By adopting the above technical solution, the moving column moves and drives the gear to rotate, thereby controlling the opening and closing degree of the support rod. The insertion hole and the pin cooperate to fix the position of the moving column, thereby fixing the opening and closing state of the bracket. The auxiliary cylinder provides a sliding track for the moving column, ensuring that the moving column can slide stably inside it.

[0016] Preferably, the outer surface of the movable column is provided with a plurality of insertion holes in a linear array, and the outer surface of the auxiliary cylinder is provided with a pin that matches the insertion holes.

[0017] By adopting the above technical solution, the insertion hole and the pin cooperate to fix the position of the moving column, thereby fixing the opening and closing state of the bracket.

[0018] Preferably, the auxiliary mechanism includes an auxiliary plate fixedly connected to the outer surface of the support body, a bidirectional lead screw threaded through one side of the auxiliary plate, and limiting plates fixedly connected to the surface of the bidirectional lead screw on both sides of one end of the auxiliary plate.

[0019] By adopting the above technical solution, the auxiliary plate provides an installation foundation for the bidirectional lead screw and guide rod, ensuring the stability and accuracy of the auxiliary mechanism. The bidirectional lead screw controls the opening and closing degree of the support rod, thereby adapting to pipes of different diameters. The rotating plate allows operators to manually rotate the bidirectional lead screw to control the auxiliary mechanism, making operation simple and convenient. The limit plate prevents the bidirectional lead screw from axially moving during rotation, ensuring the stability of the bidirectional lead screw rotation and ensuring that the auxiliary mechanism can work normally.

[0020] Preferably, an auxiliary cylinder is fixedly connected to one end of the bidirectional lead screw, and a rotating plate is fixedly connected to the end of the auxiliary cylinder away from the bidirectional lead screw.

[0021] By adopting the above technical solution, the auxiliary cylindrical connection between the bidirectional lead screw and the rotating plate plays the role of transmitting rotational force, so that the rotating plate can easily drive the bidirectional lead screw to rotate. The rotating plate provides the operator with a point of force to rotate the bidirectional lead screw, making it convenient for the operator to adjust the opening and closing degree of the bracket by rotating the rotating plate.

[0022] Preferably, a guide rod is fixedly connected to the side of the auxiliary plate away from the bidirectional lead screw, and a baffle is slidably connected to the outer surface of the guide rod. The baffle is slidably connected to the outer surface of the bracket body and the support rod, and the bidirectional lead screw and the baffle are threaded through each other.

[0023] By adopting the above technical solution, the guide rod plays a guiding role, ensuring the straightness and stability of the relevant components during the movement process, preventing the components from shifting or shaking, and improving the reliability of the support structure. The baffle is used to limit the rotation range of the support rod, thereby precisely controlling the opening and closing degree of the support.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Using external force (such as manual operation), the support rod rotates around its rotation connection point with the slide groove, and the auxiliary wheel moves outward, thereby opening the support body. By inserting pins into the holes at different positions, the position of the moving column can be fixed, thereby fixing the rotation angle of the support rod, realizing the adjustment and fixation of the degree of support opening to adapt to pipes of different diameters.

[0026] 2. When the baffle moves to the end of the support rod near the support body, it forms a more stable structure with the support rod and the support body. This structure can enhance the overall rigidity of the support, making it less prone to deformation when subjected to external forces. This improves the support capacity and stability of the support in the pipeline. Furthermore, by imposing additional restrictions on the support rod, the stability of the support is ensured, which allows the radiographic testing equipment to be positioned and operated more accurately, thereby improving the quality and efficiency of the testing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this application;

[0028] Figure 2 This is a schematic diagram of the torsion spring connection structure in this application;

[0029] Figure 3 This is a schematic diagram of the gear connection structure in this application;

[0030] Figure 4 This is a schematic diagram of the internal structure of the support body in this application;

[0031] Figure 5 This is a schematic diagram of the baffle connection structure in this application.

[0032] Reference numerals: 1. Bracket body; 2. Support rod; 3. Auxiliary wheel; 4. Torsion spring;

[0033] 51. Slide 1; 52. Gear; 53. Rack; 54. Connecting rod; 55. Moving column; 56. Insertion hole; 57. Auxiliary cylinder; 58. Pin; 59. Slide 2;

[0034] 61. Auxiliary plate; 62. Guide rod; 63. Two-way lead screw; 64. Rotating plate; 65. Baffle; 66. Limiting plate; 67. Auxiliary cylinder. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0036] This application discloses a mobile support for radiographic testing of pipelines.

[0037] Reference Figures 1 to 4A movable support for radiographic testing of pipelines includes a support body 1 that moves inside the pipeline. Both ends of the support body 1 are equipped with a spreading mechanism. The spreading mechanism includes two symmetrical sliding grooves 51 and 59 formed on the inner wall of the support body 1. The two sliding grooves 51 and 59 are arranged circumferentially and are interconnected. Sliding groove 59 is located on the side of sliding groove 51 closest to the center of the support body 1. The center of the inner wall of sliding groove 51 is rotatably connected to a support rod 2 via a pivot. One end of the support rod 2 is rotatably connected to an auxiliary... Wheel 3, with the auxiliary wheel 3 located at the end furthest from the support body 1, the support rod 2 has a width of 2cm-4cm, the auxiliary wheel 3 has a diameter of 5cm-8cm and a width of 2cm-3cm, a torsion spring 4 is fitted on the outer surface of the rotating shaft, and the side of the support rod 2 closest to the torsion spring 4 is fixedly connected to the torsion spring 4. The torsion spring 4 is located inside the slide groove 51, and the end of the torsion spring 4 furthest from the support rod 2 is fixedly connected to the inner wall of the support body 1. Under normal conditions, the support rod 2 is in a contracted state, and the torsion spring 4 is in a naturally relaxed state. One side of the support rod 2 is fixedly connected to the gear 52. The bracket body 1 is fixedly connected, with gear 52 located on the side away from torsion spring 4, and its center rotatably connected to the inner wall of the bracket body 1. The second sliding groove 59 is slidably fitted with rack 53, and rack 53 meshes with gear 52. The side of rack 53 away from gear 52 is fixedly connected to connecting rod 54, which is slidably fitted with the second sliding groove 59. Both ends of the bracket body 1 are fixedly connected to auxiliary cylinder 57 at their centers. A movable column 55 is slidably connected inside the center of the bracket body 1 and auxiliary cylinder 57. One end of the connecting rod 54 is connected to the movable column 55. The outer surface is fixedly connected, and the connecting rod 54 is located at the end away from the rack 53. The outer surface of the moving column 55 has a number of insertion holes 56 arranged in a linear array, and the positions of the insertion holes 56 and the support rod 2 are staggered to avoid affecting the use of the support rod 2. The outer surface of the auxiliary cylinder 57 is connected to the pin 58 at the end away from the bracket body 1. The position of the pin 58 and the insertion hole 56 are corresponding, and the pin 58 and the insertion hole 56 are properly matched. The outer surface of the auxiliary cylinder 57 has a slide rail, which has the same width as the connecting rod 54, and the slide rail is slidably matched with the connecting rod 54.

[0038] In use, the operator pulls out the pin 58, removing the restriction on the socket 56, thus allowing the movable column 55 to move. Then, the operator places the bracket into the pipe to be inspected and pulls the movable column 55 away from the bracket body 1, thereby moving the connecting rod 54 fixedly connected to it. Because the auxiliary cylinder 57 has a sliding track on its outer surface, which slides and adapts to the connecting rod 54, the connecting rod 54 slides within the track during movement, ensuring consistent sliding direction and preventing rotation. This also ensures that the pin 58 and socket 56 remain in the same position. The movement of the connecting rod 54 moves the rack 53 fixedly connected to it, which in turn rotates the gear 52 meshing with it. Rotation of rack 52 causes the fixedly connected support rod 2 to rotate. When rack 53 moves away from the support body 1, support rod 2 expands outward. Conversely, when rack 53 moves closer to the support body 1, support rod 2 retracts inward. After adjusting support rod 2 to fit against the inner wall of the pipe, pin 58 is inserted into the corresponding hole 56 of moving column 55 to fix the rotation angle of support rod 2, thereby adjusting and fixing the degree of support opening to adapt to pipes of different diameters. Then, the traction crawler is connected to the end of moving column 55 away from support body 1 to traction the support to move. The end of support body 1 away from moving column 55 is connected to the radiographic testing device and is placed into the pipe along with the support.

[0039] Reference Figure 5 Auxiliary mechanisms are provided on both outer surfaces of the support body 1. Each auxiliary mechanism includes an auxiliary plate 61 fixedly connected to the middle outer surface of the support body 1. One side of the auxiliary plate 61 is rotatably connected to a bidirectional lead screw 63. The middle outer surface of the bidirectional lead screw 63 is fixedly connected to two limiting plates 66. The diameter of the limiting plates 66 is larger than the diameter of the bidirectional lead screw 63, and both ends of the bidirectional lead screw 63 are fixedly connected to the limiting plates 66. The auxiliary plate 61 is located between the two limiting plates 66 and fits against them to prevent the bidirectional lead screw 63 from sliding within the auxiliary plate 61 during rotation. One end of the auxiliary rod 61 is fixedly connected to the auxiliary cylinder 67, and a limit plate 66 is fixedly connected at the connection between the bidirectional lead screw 63 and the auxiliary cylinder 67. A rotating plate 64 is fixedly connected to one end of the auxiliary cylinder 67, and the rotating plate 64 is located at the end away from the bidirectional lead screw 63. One side of the auxiliary plate 61 is fixedly connected to the guide rod 62, and the guide rod 62 is located at the side away from the bidirectional lead screw 63. The outer surface of the guide rod 62 is slidably connected to one side of the baffle 65. The baffle 65 is slidably connected to the outer surface of the bracket body 1 and the support rod 2, and the bidirectional lead screw 63 is threadedly connected to the side of the baffle 65 away from the guide rod 62.

[0040] After the support is placed into the pipe and the opening size of the support rod 2 is adjusted, the operator rotates the rotating plate 64 clockwise. The rotation of the rotating plate 64 causes the auxiliary cylinder 67, which is fixedly connected to it, to rotate. The rotation of the auxiliary cylinder 67 causes the bidirectional screw 63, which is fixedly connected to it, to rotate clockwise, thereby causing the two baffles 65 to move in opposite directions. The baffles 65 are moved to the outer surface of the end of the support rod 2 close to the support body 1, thereby providing additional restraint to the support rods 2 at both ends of the support body 1, ensuring the stability of the support, and enabling the radiographic testing equipment to be positioned and operated more accurately, thereby improving the quality and efficiency of the testing.

[0041] Among them, the torsion spring 4 mainly uses torque to represent its elastic effect, and its calculation formula is usually based on the spring stiffness (elastic coefficient). The basic formula is:

[0042] M=K·θ

[0043] in:

[0044] M is the torque generated when the torsion spring recovers (the unit is usually N·m or lb·ft);

[0045] θ is the angle of twist (in radians);

[0046] K is the stiffness of the torsion spring, representing the restoring torque generated per unit angle.

[0047] For a standard circular cross-section torsion spring, the formula for calculating the stiffness K is:

[0048] K = (G·d) 4 ) / (10.8·D·n)

[0049] in:

[0050] G is the shear modulus of the material (usually measured in N / m). 2 (or psi);

[0051] d is the diameter of the torsion spring wire;

[0052] D is the average diameter of the torsion spring;

[0053] n is the number of effective coils;

[0054] The constant 10.8 is an empirical coefficient used to correct for the mechanical distribution in actual use (this value may vary slightly under different designs and standards).

[0055] The implementation principle of a movable support for radiographic testing of pipelines according to an embodiment of this application is as follows:

[0056] In use, the operator pulls out the pin 58 and stretches the movable column 55, causing the connecting rod 54 and rack 53 to move together, which in turn drives the gear 52 and support rod 2 to rotate. This adjusts the opening and closing size of the support rod 2. After adjusting the support rod 2 to fit against the inner wall of the pipe, the pin 58 is inserted into the corresponding hole 56 of the movable column 55, thereby fixing the rotation angle of the support rod 2. This allows for adjustment and fixation of the bracket's opening degree to accommodate pipes of different diameters. Subsequently, the operator rotates the rotating plate 64 clockwise, driving the auxiliary... The cylinder 67 and the bidirectional lead screw 63 rotate clockwise, thereby driving the two baffles 65 to move in opposite directions. The baffles 65 are moved to the outer surface of the support rod 2, thereby providing additional restraint to the support rods 2 at both ends of the support body 1 to ensure the stability of the support. This allows the radiographic testing equipment to be positioned and operated more accurately, improving the quality and efficiency of the testing. Subsequently, the traction crawler, the support, and the radiographic testing device are placed into the pipeline together, and the traction crawler is started to drive the support and the radiographic testing device to perform radiographic testing in the pipeline.

[0057] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A movable support for radiographic testing of pipelines, characterized in that: Includes a support body (1) that moves inside the pipe; The outer surface of the support body (1) is provided with a support mechanism for opening the support. Both sides of the support body (1) are provided with auxiliary mechanisms for controlling the opening and closing degree of the support; The opening mechanism includes a first groove (51) and a second groove (59) circumferentially opened on both sides of the support body (1) and connected to each other. A support rod (2) is rotatably connected inside the first groove (51). An auxiliary wheel (3) is rotatably connected to one end of the support rod (2) away from the support body (1). A torsion spring (4) is fixed between the support rod (2) and the inner wall of the support body (1). The support rod (2) is fixedly connected to a gear (52) on the side away from the torsion spring (4) and inside the slide groove (51). The gear (52) is rotatably connected inside the bracket body (1). The slide groove (51) is slidably connected to a rack (53) that meshes with the gear (52). The bottom surface of the rack (53) is fixedly connected to a connecting rod (54) that is slidably adapted to the slide groove (59). Both ends of the support body (1) are fixedly connected to auxiliary cylinders (57), and the auxiliary cylinders (57) and the middle of the support body (1) are movably connected to a movable column (55) fixed to the connecting rod (54). The outer surface of the movable column (55) is linearly arrayed with several insertion holes (56), and the outer surface of the auxiliary cylinder (57) is fitted with a pin (58) that matches the insertion hole (56).

2. The movable support for radiographic testing of pipelines according to claim 1, characterized in that: The auxiliary mechanism includes an auxiliary plate (61) fixedly connected to the outer surface of the support body (1). A two-way lead screw (63) is threaded through one side of the auxiliary plate (61). Limiting plates (66) that are fixed to the surface of the two-way lead screw (63) are attached to both sides of one end of the auxiliary plate (61).

3. A movable support for radiographic testing of pipelines according to claim 2, characterized in that: One end of the bidirectional lead screw (63) is fixedly connected to an auxiliary cylinder (67), and the end of the auxiliary cylinder (67) away from the bidirectional lead screw (63) is fixedly connected to a rotating plate (64).

4. A movable support for radiographic testing of pipelines according to claim 3, characterized in that: A guide rod (62) is fixedly connected to the side of the auxiliary plate (61) away from the bidirectional lead screw (63). A baffle (65) is slidably connected to the outer surface of the guide rod (62). The baffle (65) is slidably connected to the outer surface of the bracket body (1) and the support rod (2). The bidirectional lead screw (63) and the baffle (65) are threaded through each other.

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