Comprehensive nondestructive testing device for weld joint of PE (Polyethylene) pipeline

Abstract

The utility model relates to the technical field of nondestructive testing for pipeline engineering, in particular to a comprehensive nondestructive testing device for a PE pipeline welding seam, which comprises a testing table, a support frame, a testing module, a rotating device, a clamping device and a moving device, support legs are mounted at four corners of the bottom end of the testing table, the support frame is mounted at one end of the top wall of the testing table, and the testing module is mounted at the other end of the top wall of the testing table. A through hole is formed in the supporting frame, the detection module is installed in the through hole through the rotating device, the first motor is started, the output end of the first motor drives the gear to rotate, the detection module is driven to rotate around a sliding groove in the through hole through meshing transmission of the gear and the gear ring, and the detection module rotates along with the gear ring. A PE pipeline weld joint is comprehensively scanned, the detection module continuously emits ultrasonic signals in the rotating process, reflected information is received through a built-in sensor, the thermal imaging module records the weld joint surface temperature change caused by ultrasonic excitation, and the weld joint surface temperature change is displayed through the display module.

Description

Technical Field

[0001] This utility model relates to the field of non-destructive testing technology for pipeline engineering, specifically a comprehensive non-destructive testing device for PE pipeline welds. Background Technology

[0002] As is well known, non-destructive testing of PE pipe welds is a key step in ensuring that welding equipment meets the usage standards. In PE (polyethylene) pipe systems, the quality of welding directly affects the overall performance, service life, and operational safety of the pipe. Therefore, conducting comprehensive non-destructive testing on the welds of PE pipes after welding is an important means of evaluating whether the welding equipment meets the usage standards, and it also lays a good foundation for the subsequent practical application of PE pipes.

[0003] Traditional fixed-angle inspection methods often have blind spots or omissions, failing to comprehensively scan the weld seam, resulting in insufficient inspection coverage. This allows some minor defects to be overlooked, affecting the accuracy and reliability of the inspection results. In particular, the phenomenon of "false welds" in PE pipe weld seams is particularly problematic. These welds may appear almost identical to qualified weld seams, but their long-term strength cannot be guaranteed, which can easily lead to safety accidents. Furthermore, the fixed devices in traditional inspection equipment are often designed for specific pipe diameters, requiring frequent clamp replacements or device adjustments for pipes of different diameters, making the operation cumbersome and inefficient. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a comprehensive non-destructive testing device for PE pipe welds.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a comprehensive non-destructive testing device for PE pipe welds, comprising a testing platform, a support frame, a testing module, a rotating device, a clamping device, and a moving device. Support legs are installed at the four corners of the bottom of the testing platform. The support frame is installed at one end of the top wall of the testing platform. A through hole is formed in the support frame, and the testing module is installed in the through hole via the rotating device. The rotating device includes a sliding groove, a gear ring, a cavity, a gear, and a first motor. The sliding groove is formed in the through hole, and the gear ring is rotatably installed in the sliding groove. The cavity is formed on the upper side of the sliding groove, and the gear is rotatably installed in the cavity. The gear and the gear ring are meshed. The first motor is installed on the outer wall of the support frame, and the output end of the first motor passes through the side wall of the support frame and is connected to the gear. The testing module is detachably installed on the inner side wall of the gear ring via bolts. The clamping device is installed at the end of the testing platform away from the support frame.

[0008] To facilitate the clamping and fixing of PE pipes, this utility model improves upon the following: the clamping device includes a fixing block, a rectangular groove, a bidirectional screw, a movable seat, a clamping plate, a V-groove, and a second motor. The fixing block is installed on the top wall of the end of the testing platform away from the support frame. The rectangular groove is formed at the top of the fixing block, and the bidirectional screw is rotatably installed in the rectangular groove. The second motor is installed at one end of the bidirectional screw, which passes through the side wall of the fixing block. The movable seat is threaded onto both the left and right ends of the bidirectional screw, and the clamping plate is installed at the top of each movable seat. The V-groove is formed at one end of each set of clamping plates corresponding to each other.

[0009] Preferably, the present invention is improved in that multiple sets of grooves are formed in both sets of V-shaped grooves, and multiple sets of pulleys are rotatably installed in each of the grooves.

[0010] Preferably, in this invention, two sets of guide rods are symmetrically installed in the rectangular groove along the central axis of the bidirectional screw, and both sets of guide rods are slidably connected to the movable seat.

[0011] Preferably, the improvement of this utility model is that both the first motor and the second motor are servo motors.

[0012] To facilitate the movement of the testing platform, this utility model is improved by including wheels on the moving device, with the wheels mounted on the bottom wall of the supporting leg.

[0013] To facilitate the fixing of the clamping platform, the present invention is improved by providing a brake assembly on the moving wheel, and the brake assembly is adapted to the moving wheel.

[0014] Preferably, in this invention, the movable wheel is a swivel wheel.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a comprehensive non-destructive testing device for PE pipe welds, which has the following beneficial effects:

[0017] This comprehensive non-destructive testing device for PE pipe welds features a rotating mechanism that allows the testing module to perform a 360-degree omnidirectional scan around the PE pipe weld. This design ensures that every part of the weld is fully detected, avoiding blind spots or omissions that may occur due to fixed-angle testing, thus improving the detection coverage. The rotating mechanism also ensures that the testing module maintains a consistent distance and angle with the pipe during the scanning process, reducing detection errors caused by positional changes. This contributes to providing more accurate test results, especially when using ultrasonic or thermal imaging technologies, enabling more accurate capture of minute defects inside and on the surface of the weld.

[0018] This comprehensive non-destructive testing device for PE pipe welds, through its clamping mechanism, combines a bidirectional screw with a movable seat to ensure that the clamping plate can move smoothly in a straight line. The V-groove design allows the clamping plate to automatically adapt to pipes of different diameters, providing uniform clamping force. The presence of pulleys further enhances this feature, providing rolling contact between the pipe surface and the V-groove, ensuring good clamping performance even when switching between pipes of different diameters. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0020] Figure 2 In this utility model Figure 1 A magnified structural diagram of part A;

[0021] Figure 3 This is a two-dimensional structural diagram of the present invention from a second angle;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the support frame of this utility model.

[0023] In the diagram: 1. Testing table; 2. Support frame; 3. Testing module; 4. Support leg; 5. Through hole; 6. Slide groove; 7. Gear ring; 8. Cavity; 9. Gear; 10. First motor; 11. Fixing block; 12. Rectangular groove; 13. Bidirectional screw; 14. Moving seat; 15. Clamping plate; 16. V-groove; 17. Second motor; 18. Groove; 19. Pulley; 20. Guide rod; 21. Moving wheel; 22. Brake assembly. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4A comprehensive non-destructive testing device for PE pipe welds includes a testing platform 1, a support frame 2, a testing module 3, a rotating device, a clamping device, and a moving device. Support legs 4 are installed at each of the four corners of the bottom of the testing platform 1. The support frame 2 is installed at one end of the top wall of the testing platform 1. A through hole 5 is formed in the support frame 2, and the testing module 3 is installed in the through hole 5 via the rotating device. The rotating device includes a sliding groove 6, a gear ring 7, a cavity 8, a gear 9, and a first motor 10. The sliding groove 6 is formed in the through hole 5, and the gear ring 7 is rotatably installed in the sliding groove 6. A cavity 8 is formed on the upper side of the groove 6. A gear 9 is rotatably mounted in the cavity 8, and the gear 9 meshes with the gear ring 7. The first motor 10 is mounted on the outer wall of the support frame 2. The output end of the first motor 10 passes through the side wall of the support frame 2 and is connected to the gear 9. The detection module 3 is detachably mounted on the inner side wall of the gear ring 7 via bolts. The clamping device is mounted on the end of the detection table 1 away from the support frame 2. In this embodiment, during use, the PE pipe is placed at one end of the detection table 1, so that the welding position of the PE pipe is inside the support frame 2. Adjust the clamping device according to the pipe diameter to ensure it firmly grips the pipe without causing damage. Turn on the power and start the system. At this time, the operator can set the detection parameters through the human-machine interface, such as the rotation speed and the working mode of the detection module 3 (e.g., ultrasonic frequency, thermal imaging sensitivity, etc.). The detection module has built-in ultrasonic detection module and thermal imaging detection module (both ultrasonic detection module and thermal imaging detection module are well known in this technical field and will not be described in detail here). Start the first motor 10. The output end of the first motor 10 drives the gear 9 to rotate. Through the meshing transmission between the gear 9 and the gear ring 7, the detection module 3 is driven to rotate around the sliding groove 6 in the through hole 5. The detection module 3 rotates together with the gear ring 7 to perform a comprehensive scan of the PE pipe weld. During the rotation, the detection module 3 continuously emits ultrasonic signals and receives the reflected information through the built-in sensor. At the same time, the thermal imaging module records the temperature change of the weld surface caused by ultrasonic excitation and displays it through the display module. The inner diameter of the through hole 5 can accommodate most of the PE pipe and leave room for the rotation of the detection module 3. The detachable design of the detection module 3 allows it to be disassembled and used flexibly with other types of auxiliary tools.

[0026] In practical use, to further facilitate the clamping and fixing of PE pipes, in this embodiment, the clamping device includes a fixing block 11, a rectangular groove 12, a bidirectional screw 13, a movable seat 14, a clamping plate 15, a V-groove 16, and a second motor 17. The fixing block 11 is installed on the top wall of the end of the detection platform 1 away from the support frame 2. The rectangular groove 12 is opened at the top of the fixing block 11. The bidirectional screw 13 is rotatably installed in the rectangular groove 12. The second motor 17 is installed at one end of the bidirectional screw 13 through the side wall of the fixing block 11. The movable seat 14 is threaded on both the left and right ends of the bidirectional screw 13. The clamping plate 15 is installed at the top of the movable seat 14. The clamping plates 15 are opened at the corresponding ends of the two sets of clamping plates 15. The V-grooves 16 ensure the pipe is positioned between the V-grooves 16 of the clamping device. Turn on the power and start the second motor 17 via the human-machine interface or manual control button. The second motor 17 drives the bidirectional screw 13 to rotate. As the bidirectional screw 13 rotates, due to the opposite threads at its two ends, the two moving seats 14 move inward or outward along the rectangular grooves 12. When the pipe needs to be clamped, the moving seats 14 move inward; when the pipe needs to be released, the moving seats 14 move outward. The moving seats 14 drive the clamping plates 15 to move inward until the V-grooves 16 on the two sets of clamping plates 15 are tightly fitted against the outer wall of the PE pipe. The design of the V-grooves 16 allows the clamping plates 15 to automatically adapt to the circular contour of the pipe, providing uniform clamping force. The second motor 17 stops operating, and the clamping device enters the holding state. At this point, the PE pipe is firmly fixed on the inspection table 1, and non-destructive testing of the weld can begin.

[0027] Preferably, in this embodiment, multiple sets of grooves 18 are formed in both sets of V-grooves 16, and multiple sets of pulleys 19 are rotatably installed in each groove 18. The pulleys 19 can provide rolling contact between the pipe surface and the V-grooves 16, greatly reducing the friction between the two. This not only makes the pipe easier to clamp and release, but also reduces material wear caused by friction. By reducing friction, the pulleys 19 can effectively protect the V-grooves 16 and the pipe surface, extending the service life of the clamping device and the pipe. The presence of the pulleys 19 allows the pipe to enter and exit the V-grooves 16 more smoothly during the clamping process, reducing the labor intensity of the operator and improving work efficiency. The pulleys 19 can automatically adjust their position according to the pipe diameter, ensuring a good clamping effect even when switching between pipes of different diameters, enhancing the versatility and flexibility of the equipment. Furthermore, if the subsequent inspection system is equipped with an automatic feeding function, the pulleys 19 can help the pipe move more smoothly, reducing the possibility of jamming or blockage, and improving the automation level of the entire inspection process.

[0028] Preferably, in this embodiment, two sets of guide rods 20 are symmetrically installed in the rectangular groove 12 with respect to the central axis of the bidirectional screw 13. Both sets of guide rods 20 are slidably connected to the movable seat 14. The presence of the guide rods 20 ensures that the movable seat 14 moves smoothly in a straight line, avoiding possible offset or tilting caused by the rotation of the bidirectional screw 13. This allows the clamping plate 15 to be accurately positioned to the required position, improving the accuracy of the clamping process.

[0029] Preferably, in this embodiment, both the first motor 10 and the second motor 17 are servo motors. Servo motors can provide very high position resolution and control accuracy, and can accurately control rotation angle or linear displacement. This is especially important in situations requiring high-precision operation (such as PE pipe weld inspection), ensuring that the detection module 3 and the clamping device can accurately reach the predetermined position.

[0030] In practical use, to further facilitate the movement of the testing platform 1, in this embodiment, the moving device includes a moving wheel 21. The moving wheel 21 is installed on the bottom wall of the support leg 4. The presence of the moving wheel 21 allows the testing platform 1 to be easily moved between different positions without manual handling or disassembly of the equipment. This greatly improves the flexibility of operation, especially when multiple pipes need to be tested, the testing platform 1 can be quickly moved to the required position.

[0031] In practical use, to further facilitate the fixing of the clamping platform, in this embodiment, a brake assembly 22 is provided on the moving wheel 21. The brake assembly 22 is adapted to the moving wheel 21. The brake assembly 22 can ensure that the testing platform 1 will not move unexpectedly due to external factors (such as slight ground tilt, wind or human collision) during operation. This not only protects the equipment itself, but also ensures the safety of the operator.

[0032] Preferably, in this embodiment, the movable wheel 21 is a swivel wheel, which can rotate 360 ​​degrees on the horizontal plane, allowing the testing table 1 to move easily in any direction without complicated steering operations, which greatly improves the flexibility of operation.

[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive non-destructive testing device for PE pipe welds, comprising a testing table (1), a support frame (2), a testing module (3), a rotating device, a clamping device, and a moving device, characterized in that: The bottom of the testing platform (1) is equipped with support legs (4) at all four corners. The top wall of the testing platform (1) is equipped with a support frame (2). A through hole (5) is provided in the support frame (2). The testing module (3) is installed in the through hole (5) through the rotating device. The rotating device includes a slide groove (6), a gear ring (7), a cavity (8), a gear (9), and a first motor (10). The slide groove (6) is provided in the through hole (5). The gear ring (7) is rotatably installed in the slide groove (6). 6) The cavity (8) is provided on one side of the upper part. The gear (9) is rotatably installed in the cavity (8). The gear (9) and the gear ring (7) are meshed and connected. The first motor (10) is installed on the outer wall of the support frame (2). The output end of the first motor (10) passes through the side wall of the support frame (2) and is connected to the gear (9). The detection module (3) is detachably installed on the inner side wall of the gear ring (7) by bolts. The clamping device is installed at the end of the detection table (1) away from the support frame (2).

2. A device for the full non-destructive testing of a PE pipe weld according to claim 1, characterized in that: The clamping device includes a fixed block (11), a rectangular groove (12), a bidirectional screw (13), a movable seat (14), a clamping plate (15), a V-groove (16), and a second motor (17). The fixed block (11) is installed on the top wall of the end of the detection table (1) away from the support frame (2). The rectangular groove (12) is opened at the top of the fixed block (11). The bidirectional screw (13) is rotatably installed in the rectangular groove (12). The second motor (17) is installed through the side wall of the fixed block (11) at one end of the bidirectional screw (13). The movable seat (14) is threaded on both the left and right ends of the bidirectional screw (13). The clamping plate (15) is installed at the top of the movable seat (14). The V-groove (16) is opened at the corresponding end of the two sets of clamping plates (15).

3. A device for the full non-destructive testing of a PE pipe weld according to claim 2, characterized in that: Both sets of V-grooves (16) have multiple sets of grooves (18), and multiple sets of pulleys (19) are rotatably installed in each groove (18).

4. A device for the full non-destructive testing of a PE pipe weld according to claim 3, characterized in that: Two sets of guide rods (20) are symmetrically installed in the rectangular groove (12) along the central axis of the bidirectional screw (13), and both sets of guide rods (20) are slidably connected to the movable seat (14).

5. A device for the full non-destructive testing of a PE pipe weld according to claim 4, characterized in that: Both the first motor (10) and the second motor (17) are servo motors.

6. The comprehensive non-destructive testing device for PE pipe welds according to claim 5, characterized in that: The moving device includes a moving wheel (21), and the moving wheel (21) is mounted on the bottom wall of the supporting leg (4).

7. A device for the full non-destructive testing of a PE pipe weld according to claim 6, characterized in that: A brake assembly (22) is provided on the movable wheel (21), and the brake assembly (22) is adapted to the movable wheel (21).

8. A device for the full non-destructive testing of a PE pipe weld according to claim 7, characterized in that: The movable wheel (21) is a swivel wheel.

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