Pipeline circumferential weld lossless internal detection mechanism

Abstract

The utility model discloses a pipeline circumferential weld lossless internal detection mechanism, which relates to the technical field of pipeline welding, and comprises two mounting plates, control assemblies are arranged on the outer walls of the periphery of the mounting plates, the tail ends of the control assemblies are connected with driving assemblies, the driving assemblies are matched with the control assemblies, the number of the mounting plates is two, and the mounting plates are connected with the control assemblies. Mounting rods are welded to the outer walls of the two adjacent sides of the mounting plate, and detection assemblies are arranged on the outer walls of the two adjacent sides of the mounting rods. In the utility model, the first servo motor controls the driving wheel to rotate so as to drive the device to move along the inner wall of the pipeline, the second servo motor drives the detection disc to rotate at a low speed so as to enable the infrared distance meter to rotate at a constant speed, if a welding seam is damaged, infrared rays penetrate through the pipeline, and the length extension of the rays leads to dramatic change of ray data; compared with a traditional device, the device can freely move in the pipeline, and is suitable for detecting the welding seams of the pipelines with different specifications and sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a non-destructive internal detection mechanism for pipeline girth welds. Background Art

[0002] Pipeline engineering is a widely used construction technology and occupies an important position in construction projects. There are many types of pipelines, mainly used to transport gas and fluid media. At present, pipelines are mainly made of welded steel pipes. Since the pipelines are affected by welding heat during the welding process, the structure and performance of the welded joints will change greatly, which will seriously affect the overall mechanical properties of the pipelines. Therefore, the welds of the pipelines need to be inspected.

[0003] There are many methods for detecting internal welds in pipelines, among which eddy current testing is a conventional non-destructive testing method. It uses the principle of electromagnetic induction to detect defects on the surface or near the surface of the conductor. This method can be used to detect and locate the circumferential welds on the inner wall of the pipeline. Internal pipeline inspection generally uses an internal through-type eddy current probe, but the coil size of this probe should be close to the inner diameter of the pipeline to achieve a better detection effect. This will cause the probe to be relatively large and difficult for robots to carry it for inspection. Another method is to use a surface probe, but because the inspection is on a curved surface, the surface probe has a smaller coverage range and is easily affected by local corrosion defects. Utility Model Content

[0004] The purpose of the present application is to provide a non-destructive internal testing mechanism for pipeline girth welds to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a non-destructive internal detection mechanism for a pipeline girth weld, comprising a mounting plate, control components are arranged on the outer walls around the mounting plate, a driving component is connected to the end of the control component, the driving component is adapted to the control component, the mounting plate has two pieces, mounting rods are welded to the outer walls on both adjacent sides of the mounting plate, and detection components are arranged on the outer walls on both adjacent sides of the mounting rod, the detection component comprises a mounting block mounted on the outer wall of the mounting rod, mounting disks are rotatably mounted on the outer walls on both adjacent sides of the mounting block, the detection disk is mounted on the end of the mounting disk by bolts, an infrared rangefinder is mounted on the outer wall of the detection disk, the infrared rangefinder is adapted to the detection disk, the driving component comprises a driving frame, the driving frame is a "C"-shaped structure, a driving wheel is rotatably mounted on the inner wall of the driving frame, and the driving wheel is adapted to the driving frame.

[0006] Preferably, a first servo motor is installed on the outer wall of the driving frame by bolts, the output shaft of the first servo motor is connected to the driving wheel, a driving groove is opened on the inner wall of the mounting block, a second servo motor is installed on the inner wall of the driving groove, the output shaft of the second servo motor is connected to the mounting disk, the infrared rangefinder is connected to a PLC controller via a wireless network, and the PLC controller is connected to the second servo motor via a wireless network.

[0007] Preferably, the control assembly includes an extension groove welded to the outer walls around the mounting plate, an extension rod is slidably mounted on the inner wall of the extension groove, the extension rod is connected to the drive frame, an electric telescopic rod is mounted on the inner wall of the extension groove, and the end of the electric telescopic rod is connected to the extension rod.

[0008] Preferably, an outer wall of the mounting block is provided with a sensing groove, an inner wall of the sensing groove is provided with a camera, and the camera is connected to a terminal display via a wireless network.

[0009] Preferably, a connecting groove is formed on the outer wall of the mounting rod, and a connecting block is welded on the outer wall of the mounting block on one side close to the connecting groove, and the connecting block is adapted to the connecting groove.

[0010] Preferably, the outer wall at the top of the mounting rod and the outer wall of the connecting block are both provided with fixing holes, and the inner walls of the fixing holes are plugged with fixing pins adapted thereto, and the length of the fixing pins is greater than the thickness of the connecting block.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] 1. In the utility model, when working, the first servo motor controls the driving wheel to rotate so as to drive the device to move along the inner wall of the pipeline. When the device moves to the welding position, under the action of the camera, the staff controls the detection disk to align with the weld, and the second servo motor drives the detection disk to rotate at a low speed so that the infrared rangefinder rotates at a uniform speed. If the weld is intact and undamaged, the value of the infrared ray must be within a certain range. If the weld is damaged, the infrared ray will penetrate the pipeline. At this time, the ray length is infinitely extended, resulting in a drastic change in the ray data, thereby judging that the weld at this position has defects. At the same time, when the infrared ray length of the infrared rangefinder changes drastically, the second servo motor stops working. At this time, the ray is emitted from the inside of the pipeline to locate the damaged part of the pipeline weld, thereby facilitating the repair of the weld. Compared with traditional devices, it can move freely inside the pipeline, is suitable for pipeline weld detection of different specifications and sizes, and is monitored by infrared rays. The infrared rangefinder is small in size, easy to enter the inside of the pipeline, and more convenient to use.

[0013] 2. In the utility model, when testing the pipeline weld, the electric telescopic rod drives the extension rod to extend and retract, thereby adjusting the position of the driving wheel according to the different diameters of the pipeline, which is convenient for testing pipelines of different specifications. The fixing pin connects the mounting rod with the mounting block, which is convenient for installation and disassembly of the device and for carrying the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the main appearance structure in the embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the structure of the driving component in the embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the control component structure in an embodiment of the present application;

[0018] Figure 4 Schematic diagram of the detection component structure in the embodiment of the present application.

[0019] In the figure: 1. mounting plate; 2. mounting rod; 3. mounting block; 4. mounting plate; 5. detection plate; 6. infrared rangefinder; 7. driving frame; 8. driving wheel; 9. first servo motor; 10. second servo motor; 11. extension slot; 12. extension rod; 13. electric telescopic rod; 14. camera; 15. connecting slot; 16. connecting block; 17. fixing pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] refer to Figure 1-4The nondestructive internal detection mechanism of a pipeline ring weld shown in the figure comprises a mounting plate 1, the outer walls around the mounting plate 1 are all provided with control components, the end of the control component is connected to a driving component, the driving component is adapted to the control component, there are two mounting plates 1, the outer walls on both adjacent sides of the mounting plate 1 are welded with mounting rods 2, the outer walls on both adjacent sides of the mounting rods 2 are all provided with detection components, the detection component comprises a mounting block 3 mounted on the outer wall of the mounting rod 2, the outer walls on both adjacent sides of the mounting block 3 are rotatably mounted with mounting disks 4, the end of the mounting disk 4 is bolted with a detection disk 5, the outer wall of the detection disk 5 is installed with an infrared rangefinder 6, the infrared rangefinder 6 is adapted to the detection disk 5, the driving component comprises a driving frame 7, the driving frame 7 is a "C"-shaped structure, a driving wheel 8 is rotatably installed on the inner wall of the driving frame 7, the driving wheel 8 is adapted to the driving frame 7, a first servo motor 9 is installed on the outer wall of the driving frame 7 by bolts, the output shaft of the first servo motor 9 is connected to the driving wheel 8, a driving groove is opened on the inner wall of the mounting block 3, a second servo motor 10 is installed on the inner wall of the driving groove, the output shaft of the second servo motor 10 is connected to the mounting disk 4, the infrared rangefinder 6 is connected to the PLC controller via a wireless network, the PLC controller is connected to the second servo motor 10 via a wireless network, an induction groove is opened on the outer wall of the mounting block 3, a camera 14 is installed on the inner wall of the induction groove, and the camera 14 is connected to a terminal display via a wireless network.

[0023] By means of the above structure: when working, the detection component is connected to the mounting rod 2 to complete the assembly of the device, and then the device is placed inside the pipe, and the position of the driving component is adjusted by the control component so that the driving wheel 8 contacts the inner wall of the pipe, and then the first servo motor 9 controls the driving wheel 8 to rotate so as to drive the device to move along the inner wall of the pipe, and the camera 14 takes pictures of the inner wall of the pipe, so that the operator can understand the position change of the device. When the device moves to the welding position, under the action of the camera 14, the staff controls the detection plate 5 to align with the weld. At this time, the infrared rangefinder 6 works to emit infrared rays, and the width of the infrared rays is greater than the width of the weld. During detection, the second servo motor The machine 10 drives the detection disk 5 to rotate at a low speed so that the infrared rangefinder 6 rotates at a uniform speed. If the weld is intact and undamaged, the value of the infrared ray must be within a certain range. If the weld is damaged, the infrared ray will penetrate the pipeline. At this time, the ray length is infinitely extended, resulting in a drastic change in the ray data, thereby judging that there is a defect in the weld at this position. At the same time, when the infrared ray length of the infrared rangefinder 6 changes drastically, the second servo motor 10 stops working. At this time, the ray is emitted from the inside of the pipeline to locate the damaged part of the pipeline weld, thereby facilitating the repair of the weld. Compared with traditional devices, it can move freely inside the pipeline and is suitable for pipeline weld detection of different specifications and sizes.

[0024] Example 2

[0025] like Figure 3As shown, the control component includes an extension groove 11 welded to the outer wall around the mounting plate 1, an extension rod 12 is slidably installed on the inner wall of the extension groove 11, the extension rod 12 is connected to the driving frame 7, an electric telescopic rod 13 is installed on the inner wall of the extension groove 11, and the end of the electric telescopic rod 13 is connected to the extension rod 12. When the pipeline weld is detected, the electric telescopic rod 13 drives the extension rod 12 to extend and retract, thereby adjusting the position of the driving wheel 8 according to the different diameters of the pipeline, so as to facilitate the detection of pipelines of different specifications.

[0026] like Figure 2 As shown, a connecting groove 15 is provided on the outer wall of the mounting rod 2, and a connecting block 16 is welded on the outer wall of the mounting block 3 near the connecting groove 15. The connecting block 16 is adapted to the connecting groove 15. Both the outer wall of the top of the mounting rod 2 and the outer wall of the connecting block 16 are provided with fixing holes. A fixing pin 17 adapted to the fixing hole is inserted into the inner wall of the fixing hole. The length of the fixing pin 17 is greater than the thickness of the connecting block 16. The fixing pin 17 connects the mounting rod 2 to the mounting block 3, which is convenient for installation and disassembly of the device and for carrying the device.

[0027] How this utility works:

[0028] During operation, the detection component is connected to the mounting rod 2 to complete the assembly of the device, and then the device is placed inside the pipeline. The position of the driving component is adjusted by the control component so that the driving wheel 8 contacts the inner wall of the pipeline. Then the first servo motor 9 controls the driving wheel 8 to rotate so as to drive the device to move along the inner wall of the pipeline. The camera 14 takes pictures of the inner wall of the pipeline to facilitate the operator to understand the position change of the device. When the device moves to the welding position, under the action of the camera 14, the staff controls the detection disk 5 to align with the weld. At this time, the infrared rangefinder 6 works to emit infrared rays, and the width of the infrared rays is greater than the width of the weld. During detection, the second servo motor 10 drives the detection disk 5 to rotate at a low speed so that the infrared rangefinder 6 rotates at a uniform speed. If the weld is intact and undamaged, the value of the infrared ray must be within a certain range. If the weld is damaged, the infrared ray will penetrate the pipeline. At this time, the ray length is infinitely extended, resulting in a drastic change in the ray data, thereby judging that there is a defect in the weld at this position. At the same time, when the infrared ray length of the infrared rangefinder 6 changes drastically, the second servo motor 10 stops working. At this time, the ray is emitted from the inside of the pipeline to locate the damaged part of the pipeline weld, thereby facilitating the repair of the weld.

[0029] When inspecting the pipeline weld, the electric telescopic rod 13 drives the extension rod 12 to extend and retract, thereby adjusting the position of the driving wheel 8 according to the different diameters of the pipeline, which is convenient for inspecting pipelines of different specifications. The fixing pin 17 connects the mounting rod 2 with the mounting block 3, which is convenient for installation and disassembly of the device and for carrying the device.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-destructive internal testing mechanism for a pipeline girth weld, comprising a mounting plate (1), characterized in that: The outer walls around the mounting plate (1) are all provided with control components. The end of the control component is connected to a drive component. The drive component is compatible with the control component. The mounting plate (1) has two pieces. The outer walls on both sides of the mounting plate (1) are welded with mounting rods (2). The outer walls on both sides of the mounting rods (2) are both provided with detection components. The detection components include mounting blocks (3) mounted on the outer walls of the mounting rods (2). The outer walls on both sides of the mounting blocks (3) are both rotatably mounted with mounting plates (4). The end of the mounting plate (4) is mounted with a detection plate (5) by bolts. The outer wall of the detection plate (5) is mounted with an infrared rangefinder (6). The infrared rangefinder (6) is compatible with the detection plate (5). The drive component includes a drive frame (7). The drive frame (7) is a "C"-shaped structure. The inner wall of the drive frame (7) is rotatably mounted with a drive wheel (8). The drive wheel (8) is compatible with the drive frame (7).

2. A pipeline girth weld nondestructive internal testing mechanism according to claim 1, characterized in that: A first servo motor (9) is mounted on the outer wall of the driving frame (7) by bolts, and an output shaft of the first servo motor (9) is connected to a driving wheel (8). A driving groove is formed on the inner wall of the mounting block (3), and a second servo motor (10) is mounted on the inner wall of the driving groove, and an output shaft of the second servo motor (10) is connected to a mounting plate (4). The infrared rangefinder (6) is connected to a PLC controller via a wireless network, and the PLC controller is connected to the second servo motor (10) via a wireless network.

3. A pipeline girth weld nondestructive internal testing mechanism according to claim 1, characterized in that: The control assembly comprises an extension groove (11) welded to the outer wall around the mounting plate (1), an extension rod (12) is slidably mounted on the inner wall of the extension groove (11), the extension rod (12) is connected to the driving frame (7), an electric telescopic rod (13) is mounted on the inner wall of the extension groove (11), and the end of the electric telescopic rod (13) is connected to the extension rod (12).

4. The pipeline girth weld nondestructive internal testing mechanism according to claim 1, characterized in that: The outer wall of the mounting block (3) is provided with a sensing groove, the inner wall of the sensing groove is provided with a camera (14), and the camera (14) is connected to a terminal display via a wireless network.

5. The pipeline girth weld nondestructive internal testing mechanism according to claim 1, characterized in that: The outer wall of the mounting rod (2) is provided with a connecting groove (15), and a connecting block (16) is welded to the outer wall of the mounting block (3) on one side close to the connecting groove (15), and the connecting block (16) is adapted to the connecting groove (15).

6. A pipeline girth weld nondestructive internal testing mechanism according to claim 5, characterized in that: The top outer wall of the mounting rod (2) and the outer wall of the connecting block (16) are both provided with fixing holes, and the inner wall of the fixing hole is plugged with a fixing pin (17) adapted thereto, and the length of the fixing pin (17) is greater than the thickness of the connecting block (16).

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