Creep damage detection probe frame for power station boiler

Abstract

The utility model belongs to the technical field of creep damage detection for power station boilers, and particularly relates to a creep damage detection probe frame for a power station boiler, which comprises a boiler tube and a frame body assembly arranged on the boiler tube, an ultrasonic detection probe is arranged on the frame body assembly, and the frame body assembly comprises two fixed discs sleeved on the boiler tube. Fixing assemblies are arranged on the two fixing discs, pulleys are hinged to the fixing assemblies, circular grooves are formed in the sides, close to each other, of the two fixing discs, sliding blocks are arranged in the circular grooves, rotating rings are installed on one sides of the sliding blocks, meshing teeth are arranged on the outer sides of the rotating rings, and ultrasonic detection probes are arranged in the rotating rings; and rotating assemblies are arranged on the two fixing discs, and gears meshed with the meshing teeth are arranged on the rotating assemblies. According to the device, the fixing assembly does not need to restore to the original position, the cost input is reduced, and the fault risk is reduced. And meanwhile, during detection, the ultrasonic detection probe performs all-directional mobile detection, so that the detection effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of creep damage detection technology for power plant boilers, and specifically relates to a creep damage detection probe holder for power plant boilers. Background Technology

[0002] During the operation of a power plant boiler, boiler tubes may be subjected to prolonged high temperatures and stress, leading to creep damage. Creep damage is a potential safety hazard; if not detected and addressed promptly, it can cause boiler tube rupture and leakage, severely impacting the safe operation of the boiler.

[0003] Specialized testing equipment is typically required to detect creep damage in boiler tubes. Traditional creep damage detection methods may have some limitations. For example, some methods may require disassembly or destructive testing of the boiler tubes, which can lead to boiler downtime and increased maintenance costs. Furthermore, traditional methods may not be able to provide a comprehensive view of the boiler tubes, potentially resulting in blind spots.

[0004] Existing probe holders typically require disassembly and reassembly when inspecting other locations, which is time-consuming and labor-intensive. Furthermore, some existing probe holders may use electrical components (such as motorized actuators) to move the ultrasonic probe along the holder assembly. However, motorized actuators have several drawbacks. For example, when the actuator is in operation, the fixing components must be disassembled or restored to their original positions, increasing cost and operational complexity. In addition, motorized actuators require a separate control system, increasing system complexity and the risk of failure.

[0005] To address this issue, we propose a creep damage detection probe holder for power plant boilers. This design eliminates the need to reposition fixed components, reducing costs and minimizing the risk of failure. Furthermore, during testing, the ultrasonic probe allows for omnidirectional movement, improving detection accuracy and eliminating the need for manual inspection, thus saving time and effort. Utility Model Content

[0006] The purpose of this invention is to provide a creep damage detection probe holder for power plant boilers. This design eliminates the need to reposition the fixed components, reducing costs and minimizing the risk of failure. Furthermore, during testing, the ultrasonic probe allows for omnidirectional movement, improving detection accuracy and eliminating the need for manual inspection, thus saving time and effort.

[0007] The specific technical solution adopted in this utility model is as follows:

[0008] A creep damage detection probe holder for a power plant boiler includes a boiler tube and a frame assembly mounted on the boiler tube, wherein an ultrasonic detection probe is mounted on the frame assembly.

[0009] The frame assembly includes two fixed plates sleeved on the boiler tube. Each of the two fixed plates is equipped with a fixed component. A pulley is hinged to the fixed component. A circular groove is opened on the side of the two fixed plates that are close to each other. A slider is provided inside the circular groove. A rotating ring is installed on one side of the slider. A meshing tooth is provided on the outside of the rotating ring. The ultrasonic detection probe is provided inside the rotating ring.

[0010] The two fixed disks are provided with rotating components, and the rotating components are provided with gears that mesh with the meshing teeth.

[0011] Furthermore, the fixing component includes a through hole formed on the fixing plate, a movable rod is disposed inside the through hole, the bottom of the movable rod is hinged to the pulley, a limit plate is installed on the top of the movable rod, a spring is sleeved on the movable rod, the spring is located between the pulley and the inner wall of the fixing plate, and the movable rod is provided with scale lines.

[0012] Furthermore, the circular groove matches the slider.

[0013] Furthermore, the diameter of the rotating ring is the same as the diameter of the fixed disk.

[0014] Furthermore, the rolling direction of the pulley is consistent with the length direction of the boiler tube.

[0015] Furthermore, the rotating assembly includes a motor mounted on the fixed disk, the output end of the motor is equipped with a rotating shaft, and the gear is sleeved on the rotating shaft.

[0016] The technical effects achieved by this utility model are as follows:

[0017] First, two fixed discs and a rotating ring are fitted onto the boiler tubes, and then the entire frame assembly is secured to the boiler tubes using a fixing component. Next, the rotating component drives a gear to rotate, which in turn drives the rotating ring to rotate a slider within a circular groove. As the rotating ring rotates, it moves an ultrasonic testing probe to detect creep damage to the boiler tubes. Simultaneously, movement is possible via pulleys, eliminating the need to reposition the fixing component, reducing costs, and minimizing the risk of failure. Furthermore, during testing, the rotating component allows the ultrasonic testing probe to move omnidirectionally, improving testing accuracy and eliminating the need for manual inspection, thus saving time and labor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a front view of the utility model;

[0020] Figure 3 This is a schematic diagram of the slider of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the movable rod of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Boiler tube; 2. Ultrasonic testing probe; 3. Fixed plate; 4. Pulley; 5. Circular groove; 6. Slider; 7. Rotating ring; 8. Meshing teeth; 9. Gear; 10. Moving rod; 11. Spring; 12. Scale line; 13. Motor. Detailed Implementation

[0024] To make the purpose and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0025] like Figure 1-4 As shown, the specific technical solution adopted in this utility model is as follows: a creep damage detection probe frame for power plant boilers, including a boiler tube 1 and a frame assembly installed on the boiler tube 1, wherein an ultrasonic detection probe 2 is installed on the frame assembly;

[0026] The frame assembly includes two fixed plates 3 sleeved on the boiler tube 1. Each fixed plate 3 is equipped with a fixed component. A pulley 4 is hinged to the fixed component. A circular groove 5 is opened on the side of the two fixed plates 3 that is close to each other. A slider 6 is installed inside the circular groove 5. A rotating ring 7 is installed on one side of the slider 6. A meshing tooth 8 is provided on the outside of the rotating ring 7. An ultrasonic detection probe 2 is installed inside the rotating ring 7.

[0027] Two fixed disks 3 are equipped with rotating components, and the rotating components are equipped with gears 9 that mesh with meshing teeth 8.

[0028] Its working principle is as follows: First, two fixed discs 3 and a rotating ring 7 are fitted onto the boiler tube 1, and then the entire frame assembly is fixed to the boiler tube 1 using a fixing component. Next, the rotating component drives the gear 9 to rotate, and the gear 9 drives the meshing teeth 8 to make the rotating ring 7 drive the slider 6 to rotate within the circular groove 5. When the rotating ring 7 rotates, it drives the ultrasonic detection probe 2 to perform creep damage detection on the boiler tube 1. After the detection is completed, because the boiler tube 1 is relatively long, when detecting other positions, the detection probe frame in the existing technology needs to be disassembled and reassembled. This will take a lot of time to detect the detection probe frame and the boiler tube 1. Moreover, when the frame assembly is moved by an electrical component (such as an electric push rod) to move the ultrasonic detection probe 2, the electric push rod has some drawbacks. For example, when the electric push rod is working, the fixing component must be disassembled or restored to its original position, and it needs to be fixed again for the next use. This increases the cost and requires a separate control system. At the same time, the electric push rod is also prone to failure. Therefore, this invention allows for direct movement via pulley 4 during operation, eliminating the need to restore the fixed components to their original positions, reducing costs, and minimizing the risk of malfunction. Simultaneously, during testing, the ultrasonic testing probe 2 allows for omnidirectional movement, improving testing effectiveness and eliminating the need for manual inspection, thus saving time and effort.

[0029] The fixing component includes a through hole in the fixing plate 3, a moving rod 10 inside the through hole, a pulley 4 hinged to the bottom of the moving rod 10, a limit plate installed on the top of the moving rod 10, a spring 11 sleeved on the moving rod 10, the spring 11 being located between the pulley 4 and the inner wall of the fixing plate 3, and a scale line 12 provided on the moving rod 10.

[0030] When the fixed plate 3 is fitted onto the boiler tube 1, by pulling the limiting plate, the limiting plate drives the moving rod 10 to move the pulley 4 inside the through hole, thereby allowing the boiler tube 1 to enter. Then, the elastic force of the spring 11 makes the pulley 4 fit tightly against the outside of the boiler tube 1 for fixation. At this time, the distance between the outside of the boiler tube 1 and the inner wall of the fixed plate 3 can be known through the scale line 12. This distance is set as L1. At the same time, the length of the ultrasonic detection probe 2 is L2, and the distance detected by the ultrasonic detection probe 2 is L3. L3 plus the distance of L2 minus the distance of L1, if it is 0, it means that the boiler tube 1 has no creep. If it is a positive or negative number, it means that creep exists. The positive or negative number indicates the value of the depression and the protrusion, respectively, which is the value of creep.

[0031] Workflow: During the fixing process, the distance between the outer side of the boiler tube 1 and the inner wall of the fixing plate 3 is known through the scale line 12. This distance is recorded or entered into the computer. Then, the length of the ultrasonic detection probe 2 is recorded or entered into the computer. The creep value can be obtained by calculation after the ultrasonic detection probe 2 detects the distance and records or enters it into the computer.

[0032] It should be noted that the length of the scale line 12 marked on the moving rod 10 is the length of the pulley 4. This setting allows the distance displayed by the scale line 12 to be the distance of the pulley 4 plus the distance of the moving rod 10, making it more accurate.

[0033] An ultrasonic testing head typically consists of the following parts:

[0034] 1. Probe housing: The probe housing is generally made of metal or plastic and is used to protect the internal components of the probe and to contact the object being tested.

[0035] 2. Piezoelectric crystal: This is the core part of the probe. It can convert electrical energy into ultrasonic energy and vice versa.

[0036] 3. Connecting cable: Used to connect the probe to the ultrasonic testing instrument and transmit electrical signals.

[0037] 4. Backing material: Located behind the piezoelectric crystal, it is used to absorb and scatter ultrasonic waves, reducing reflection and interference.

[0038] The working principle of an ultrasonic testing head is based on the propagation characteristics of ultrasonic waves. When the probe generates ultrasonic waves, these waves propagate within the object being tested and are reflected, refracted, or scattered when they encounter interfaces between different media or defects. The probe receives these reflected waves, converts them into electrical signals, and transmits them to the ultrasonic testing instrument for processing and analysis.

[0039] The rolling direction of pulley 4 is consistent with the length direction of boiler tube 1. This arrangement allows pulley 4 to move along the length direction of boiler tube 1, making it very convenient for inspection.

[0040] The circular groove 5 is matched with the slider 6. Matching means that the slider 6 can move smoothly inside the circular groove 5 without jamming.

[0041] The diameter of the rotating ring 7 is the same as the diameter of the mounting plate, which means that the scale line 12 of the moving rod 10 will not deviate.

[0042] The rotating assembly includes a motor 13 mounted on a fixed disk 3. A rotating shaft is installed at the output end of the motor 13, and a gear 9 is fitted on the rotating shaft. The motor 13 drives the rotating shaft to rotate the gear 9.

[0043] The end of the rotating shaft away from the motor 13 passes through the fixed disk 3 and is located between the two fixed disks 3. This arrangement enables the rotating shaft to drive the gear 9 to rotate on the meshing teeth 8.

[0044] The working principle of this utility model is as follows: First, two fixed discs 3 and a rotating ring 7 are fitted onto the boiler tube 1. Then, the entire frame assembly is fixed to the boiler tube 1 using a fixing component. Next, the rotating component drives the gear 9 to rotate, and the gear 9 drives the meshing teeth 8 to make the rotating ring 7 drive the slider 6 to rotate within the circular groove 5. When the rotating ring 7 rotates, it drives the ultrasonic detection probe 2 to perform creep damage detection on the boiler tube 1. After the detection is completed, because the boiler tube 1 is relatively long, when detecting other positions, the detection probe frame in the prior art needs to be disassembled and reassembled. This will take a lot of time to detect the detection probe frame and the boiler tube 1. Moreover, when the frame assembly is moved by an electrical component (such as an electric push rod) to move the ultrasonic detection probe 2, the electric push rod has some drawbacks. For example, when the electric push rod is working, the fixing component must be disassembled or restored to its original position, and it needs to be fixed again for the next use. This increases the cost and requires a separate control system. At the same time, the electric push rod is also prone to failure. Therefore, this invention allows for direct movement via pulley 4 during operation, eliminating the need to restore the fixed components to their original positions, reducing costs, and minimizing the risk of malfunction. Simultaneously, during testing, the ultrasonic testing probe 2 allows for omnidirectional movement, improving testing effectiveness and eliminating the need for manual inspection, thus saving time and effort.

[0045] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A creep damage detection probe frame for a power plant boiler, comprising a boiler tube (1) and a frame assembly disposed on the boiler tube (1), wherein an ultrasonic detection probe (2) is disposed on the frame assembly; Its features are: The frame assembly includes two fixed plates (3) sleeved on the boiler tube (1). Each of the two fixed plates (3) is provided with a fixing component. A pulley (4) is hinged on the fixing component. A circular groove (5) is opened on the side of the two fixed plates (3) that are close to each other. A slider (6) is provided inside the circular groove (5). A rotating ring (7) is installed on one side of the slider (6). A meshing tooth (8) is provided on the outside of the rotating ring (7). The ultrasonic detection probe (2) is provided inside the rotating ring (7). The two fixed disks (3) are provided with rotating components, and the rotating components are provided with gears (9) that mesh with the meshing teeth (8).

2. The creep damage detection probe holder for power plant boilers according to claim 1, characterized in that: The fixing component includes a through hole opened on the fixing plate (3), a movable rod (10) is provided inside the through hole, the bottom of the movable rod (10) is hinged to the pulley (4), a limit plate is installed on the top of the movable rod (10), a spring (11) is sleeved on the movable rod (10), the spring (11) is located between the pulley (4) and the inner wall of the fixing plate (3), and a scale line (12) is provided on the movable rod (10).

3. The creep damage detection probe holder for power plant boilers according to claim 1, characterized in that: The circular groove (5) matches the slider (6).

4. The creep damage detection probe holder for power plant boilers according to claim 1, characterized in that: The diameter of the rotating ring (7) is the same as the diameter of the fixed disk (3).

5. The creep damage detection probe holder for power plant boilers according to claim 1, characterized in that: The rolling direction of the pulley (4) is consistent with the length direction of the boiler tube (1).

6. The creep damage detection probe holder for power plant boilers according to claim 1, characterized in that: The rotating assembly includes a motor (13) mounted on the fixed disk (3), the output end of the motor (13) is equipped with a rotating shaft, and the gear (9) is sleeved on the rotating shaft.

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