Radiographic inspection equipment for welding seam of boiler pipeline of power plant

Abstract

The utility model discloses power station boiler pipeline welding seam radiographic inspection equipment, and belongs to the technical field of power station boiler radiographic inspection. The direction and the height of the welding seam are indirectly obtained through the color sensor; distance data between the pipeline distance and the base is obtained through a distance measuring sensor; the function of moving the detection equipment is achieved by arranging the walking mechanism, and the effect that the detection equipment can move according to the welding seam position is achieved through the controller; the height of the detection equipment can be adjusted by arranging a telescopic rod, so that the detection equipment can adapt to the conditions of unevenness of a walking road surface and unlevelness of a welding seam, and the ray detection mechanism can be always consistent with the height of the welding seam; position adjustment of the ray detection mechanism is achieved through the walking mechanism and the telescopic rod, manual movement is not needed any more, the detection efficiency of the detection device is improved, and the problems that an existing welding seam ray detection device is long in consumed time and low in work efficiency are solved.

Description

Technical Field

[0001] This utility model belongs to the field of radiographic testing technology for power plant boilers, and specifically relates to a radiographic testing device for welded seams in power plant boiler pipes. Background Technology

[0002] Because power plant boilers are large in scale, the number of boiler tubes is also very large. Due to the size of the tubes, power plant tubes are assembled through extensive welding. Welds are prone to defects such as bubbles, cracks, and holes, which can affect the safety and reliability of the boiler and even lead to accidents. Currently, radiographic testing is used to eliminate these defects and ensure the safe operation of the boiler.

[0003] Currently, when conducting weld inspection, workers need to hold the inspection equipment and inspect the welds of the pipe bank point by point or section by section through scaffolding. Because the inspection equipment needs to be moved frequently by people and there are a large number of pipe banks, the weld inspection process takes a long time and requires a lot of manpower.

[0004] In summary, existing weld radiographic inspection equipment suffers from problems such as long processing time and low efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a radiographic inspection device for weld seams of power plant boiler pipes, which is novel and reasonable in design, simple in structure, highly practical and easy to promote and use, in order to address the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A radiographic inspection device for welded seams of boiler pipes in power plants includes a base, a drive mechanism, a traveling mechanism, a telescopic rod, a radiographic inspection mechanism, and a controller.

[0008] The drive mechanism is connected to the walking mechanism and the telescopic rod respectively, and is used to drive the walking mechanism to move and drive the telescopic rod to extend and retract up and down.

[0009] The walking mechanism includes at least four casters and support legs, with one end of each support leg connected to a caster and the other end connected to a base.

[0010] A distance sensor is fixed on the side of the base near the pipe. The sensor is used to measure the distance between the pipe and the base.

[0011] One end of the telescopic rod is fixed to the base, and the other end is fixedly connected to the mounting frame. The upper part of the mounting frame is fixedly connected to the X-ray inspection mechanism via a connecting arm. A color sensor is fixed below the mounting frame. The color sensor is used to obtain the direction and height of the color trajectory on the pipe block. The color trajectory is set parallel to the weld.

[0012] The controller is located below the base and is electrically connected to the color sensor and the distance sensor respectively. It is used to receive the direction and height data of the color trajectory and the distance data between the pipe and the base. The controller is also connected to the drive mechanism to control the extension and retraction of the telescopic rod according to the height of the color trajectory and to control the movement of the walking mechanism according to the direction of the color trajectory and the distance between the pipe and the base.

[0013] Furthermore, the X-ray inspection mechanism includes a radiation emitting end and a radiation receiving end; the radiation emitting end is used to emit X-rays, and the radiation receiving end is used to receive the X-rays after they have been absorbed and scattered by the pipeline.

[0014] Furthermore, the ranging sensor employs either an infrared ranging sensor or an ultrasonic ranging sensor.

[0015] Furthermore, the telescopic pole is a rectangular telescopic pole.

[0016] Furthermore, a guardrail is provided on the base, the height of which is higher than the minimum height of the telescopic rod.

[0017] Furthermore, both the drive mechanism and the controller are provided with protective shells, the height of which is less than the height of the support legs.

[0018] Furthermore, the controller adopts a PLC controller or a microcontroller controller.

[0019] Furthermore, the extension length of the connecting arm is adjustable.

[0020] This utility model has the following advantages compared with the prior art:

[0021] This utility model discloses a radiographic inspection device for weld seams in power plant boiler pipes. It uses a color sensor to acquire the direction and height of color tracks on the pipe section, with the color tracks parallel to the weld seam, effectively obtaining the weld seam's direction and height through the color sensor. It also uses a distance sensor to acquire the distance between the pipe and the base. A walking mechanism facilitates easy movement of the inspection device, and a controller allows the device to move according to the weld seam's position. Furthermore, a telescopic rod allows for height adjustment, ensuring the device can adapt to uneven surfaces and non-horizontal weld seams, guaranteeing the radiographic inspection mechanism remains at the same height as the weld seam and improving inspection effectiveness. Simultaneously, the walking mechanism and telescopic rod enable position adjustment of the radiographic inspection mechanism, eliminating reliance on manual movement and improving inspection efficiency. This solves the problems of long inspection times and low efficiency found in existing weld radiographic inspection devices.

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the results of an embodiment of the radiographic inspection equipment for welded seams in power plant boilers according to this utility model;

[0024] Figure 2 This is a schematic diagram of a pipe array, representing an embodiment of the radiographic inspection equipment for welded seams in power plant boilers according to this utility model.

[0025] Figure 3 This is a schematic diagram of the controller connection in an embodiment of the radiographic inspection equipment for welded seams in power plant boilers according to this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Base; 2. Walking mechanism; 3. Casters; 4. Support legs; 5. Telescopic rod;

[0028] 6. Mounting bracket; 7. Connecting arm; 8. X-ray inspection mechanism; 9. X-ray emitting end;

[0029] 10. X-ray receiver; 11. Color sensor; 12. Drive mechanism; 13. Distance sensor;

[0030] 14. Guardrail; 15. Protective shell; 16. Weld; 17. Pipe; 18. Scaffolding; 19. Color track. Detailed Implementation

[0031] Example of X-ray inspection equipment for weld seams in power plant boiler pipes:

[0032] like Figure 2 As shown, existing boiler weld inspection mainly involves manual inspection of the weld 16 of pipe 17 using scaffolding 18. To improve inspection efficiency and reduce labor costs, as... Figure 1 As shown, a radiographic inspection device for weld seams in power plant boiler pipes is provided.

[0033] Specifically, the radiographic inspection equipment for weld seams in power plant boiler pipes includes a base 1, a drive mechanism 12, a traveling mechanism 2, a telescopic rod 5, a radiographic inspection mechanism 8, and a controller. Its purpose is to enable the radiographic inspection mechanism 8 to move autonomously according to the position of the weld seam 16, thereby completing the inspection of the weld seam 16.

[0034] To facilitate control of the telescopic rod 5 of the walking mechanism 2, a drive mechanism 12 is connected to both the walking mechanism 2 and the telescopic rod 5, used to drive the walking mechanism 2 to move and the telescopic rod 5 to extend and retract vertically. This allows control of the movements of both the walking mechanism 2 and the telescopic rod 5 by controlling the drive mechanism 12.

[0035] To ensure the walking mechanism 2 can move flexibly, it includes at least four casters 3 and support legs 4. One end of each support leg 4 is connected to a caster 3, and the other end is connected to a base 1. The support legs 4 ensure that there is space under the base 1 for other components of the equipment; the casters 3 ensure that the equipment can move flexibly in multiple directions.

[0036] To prevent the equipment from being too close or too far from the pipe 17, a distance sensor 13 is fixed on the side of the base 1 near the pipe 17. The sensor is used to measure the distance between the pipe 17 and the base 1. If the equipment is too close to the pipe 17, the movement of the equipment after contact may cause friction, which will damage both the equipment and the pipe 17.

[0037] like Figure 2 As shown, to ensure the height of the X-ray inspection mechanism 8 is adjustable, one end of the telescopic rod 5 is fixed to the base 1, and the other end is fixedly connected to the mounting frame 6. The mounting frame 6 is fixedly connected to the X-ray inspection mechanism 8 via a connecting arm 7. A color sensor 11 is fixed below the mounting frame 6. The color sensor 11 is used to acquire the direction and height of the color trajectory 19 on the pipe. To ensure that the trajectory data of the weld 16 can be obtained through the color trajectory 19, the color trajectory 19 is set parallel to the weld 16. The color sensor 11 is set in the X-ray inspection mechanism 8 to facilitate the acquisition of relevant data of the color trajectory 19. Since the color difference between the weld 16 and the pipe 17 is small, the color trajectory 19 is set to mark the position of the weld 16. The color of the color trajectory 19 can be any of red, green, and blue. Preferably, the color of the color trajectory 19 is red.

[0038] like Figure 3 As shown, to enable autonomous movement of the equipment, a controller is positioned below the base 1. The controller is electrically connected to the color sensor 11 and the distance sensor 13, respectively, to receive the direction and height data of the color trajectory 19 and the distance between the pipe 17 and the base 1. The controller is also connected to the drive mechanism 12, which controls the extension and retraction of the telescopic rod 5 according to the height of the color trajectory 19, ensuring that the height of the X-ray inspection mechanism 8 on the telescopic rod 5 is consistent with the height of the weld 16, thereby improving the inspection effect of the X-ray inspection mechanism 8. Furthermore, the controller controls the movement of the walking mechanism 2 according to the direction of the color trajectory 19 and the distance between the pipe 17 and the base 1. That is, moving according to the direction of the color trajectory 19 ensures that the equipment always moves around the pipe 17; moving according to the distance between the pipe 17 and the base 1 ensures the correct distance between the equipment and the pipe 17.

[0039] To ensure that the pipeline 17 can be inspected without damage, the X-ray inspection mechanism 8 includes a radiation emitting end 9 and a radiation receiving end 10; the radiation emitting end 9 is used to emit X-rays, and the radiation receiving end 10 is used to receive the X-rays after they have been absorbed and scattered by the pipeline 17.

[0040] The ranging sensor 13 can be either an infrared ranging sensor or an ultrasonic ranging sensor. Ultrasonic ranging sensors have strong anti-interference capabilities: due to the characteristics of sound waves, they are not easily affected by environmental electromagnetic fields. Infrared ranging sensors have the advantage of fast response, enabling them to complete measurement operations in a short time. The specific type of sensor used can be selected based on actual needs.

[0041] To ensure stability during the expansion and contraction process, the expansion rod 5 is a rectangular expansion rod; due to its cross-sectional characteristics, the rectangular expansion rod is less prone to instability when subjected to pressure, especially axial pressure, thus ensuring the stable operation of the expansion rod 5.

[0042] To ensure the safety of the equipment components, a guardrail 14 is provided on the base 1, and the height of the guardrail 14 is higher than the minimum height of the telescopic rod 5.

[0043] To ensure the safety of the drive mechanism 12 and the controller, a protective shell 15 is provided on both the drive mechanism 12 and the controller. To ensure that the caster wheel 3 can turn smoothly, the height of the protective shell 15 is less than the height of the support leg 4.

[0044] The controller uses either a PLC controller or a microcontroller controller. PLC controllers are reliable and easy to expand, while microcontroller controllers are low-cost and highly flexible.

[0045] Since the scaffolding 18 is installed manually, the distance between the scaffolding 18 and the pipe 17 is not unique. Furthermore, for the elevated weld 16, the equipment needs to move on the scaffolding 18. Therefore, the extension length of the connecting arm 7 is adjustable to facilitate adaptive adjustment of the extension length of the X-ray inspection mechanism 8 according to the erection of the scaffolding 18.

[0046] Working process: First, adjust the extension length of the connecting arm 7 according to the position of the scaffold 18 and the pipe 17; that is, the longer the connecting arm 7 extends, the further the scaffold 18 is from the pipe 17. Place the equipment near the pipe 17 and start it. The walking mechanism 2 will then drive the equipment to run automatically under the control of the controller. After the weld 16 closer to the ground is inspected, the equipment needs to be moved to the scaffold 18 to inspect the higher weld 16. During the movement, it can be done manually or by setting up a ramp leading to the scaffold 18 and guiding the equipment up to the scaffold 18 using a color track 19.

[0047] like Figure 2As shown, the pipe 17 is arranged in a straight line, but it can also be arranged in a curve. The weld 16 of the pipe 17 is horizontal, but it can also be oblique. For example, the weld at the bend of the pipe 17 is oblique. This embodiment is applicable to all these types of welds.

[0048] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A radiographic inspection device for welded seams of power plant boiler pipes, characterized in that: It includes a base (1), a drive mechanism (12), a walking mechanism (2), a telescopic rod (5), a radiographic detection mechanism (8), and a controller; The drive mechanism (12) is connected to the walking mechanism (2) and the telescopic rod (5) respectively, and is used to drive the walking mechanism (2) to move and drive the telescopic rod (5) to extend and retract up and down; The walking mechanism (2) includes at least four casters (3) and a support leg (4). One end of the support leg (4) is connected to the caster (3), and the other end is connected to the base (1). A distance sensor (13) is fixed on the side of the base (1) near the pipe (17). The sensor is used to measure the distance between the pipe (17) and the base (1). One end of the telescopic rod (5) is fixed to the base (1), and the other end is fixedly connected to the mounting frame (6); the mounting frame (6) is fixedly connected to the X-ray inspection mechanism (8) above the mounting frame (6) via the connecting arm (7), and a color sensor (11) is fixed below the mounting frame (6). The color sensor (11) is used to obtain the direction and height of the color trajectory (19) on the pipe bank. The color trajectory (19) is set parallel to the weld (16). The controller is located below the base (1) and is electrically connected to the color sensor (11) and the distance sensor (13) respectively. It is used to receive the direction and height data of the color trajectory (19) and the distance data between the pipe (17) and the base (1). The controller is controlled to connect to the drive mechanism (12) and is used to control the extension and retraction of the telescopic rod (5) according to the height of the color trajectory (19). It is also used to control the movement of the walking mechanism (2) according to the direction of the color trajectory (19) and the distance between the pipe (17) and the base (1).

2. The radiographic inspection equipment for welded seams of power plant boiler pipes according to claim 1, characterized in that: The X-ray detection mechanism (8) includes a radiation emitting end (9) and a radiation receiving end (10); the radiation emitting end (9) is used to emit X-rays, and the radiation receiving end (10) is used to receive X-rays after they have been absorbed and scattered by the pipe (17).

3. The radiographic inspection equipment for welded seams of power plant boiler pipes according to claim 1, characterized in that: The ranging sensor (13) is an infrared ranging sensor or an ultrasonic ranging sensor.

4. A radiographic inspection device for welded seams of power plant boiler pipes according to claim 1, characterized in that: The telescopic rod (5) is a rectangular telescopic rod.

5. A radiographic inspection device for welded seams of power plant boiler pipes according to claim 1, characterized in that: The base (1) is provided with a guardrail (14), the height of which is higher than the minimum height of the telescopic rod (5).

6. A radiographic inspection device for welded seams of power plant boiler pipes according to claim 1, characterized in that: Both the drive mechanism (12) and the controller are provided with protective shells (15), and the height of the protective shells (15) is less than the height of the support legs (4).

7. A radiographic inspection device for welded seams of power plant boiler pipes according to claim 1, characterized in that: The controller uses a PLC controller or a microcontroller controller.

8. A radiographic inspection device for welded seams of power plant boiler pipes according to claim 1, characterized in that: The extension length of the connecting arm (7) is adjustable.

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