Steam generator water chamber foreign matter inspection tool based on panorama and multi-type light

Abstract

The invention belongs to the technical field of nuclear power plant in-service inspection, and particularly relates to a steam generator water chamber foreign matter inspection tool based on panorama and multi-type light. Comprising an image acquisition device, an operation long rod and a fixing device, the operation long rod is fixed on the fixing device, and one end of the operation long rod is connected with the image acquisition device. The device has the beneficial effects that the operation amount is reduced to a certain extent, a worker is far away from a manhole during non-operation, and radiation is reduced; an intelligent image recognition algorithm is deployed, and operation efficiency and accuracy are improved; reliability and maintenance performance are improved, and later maintenance of equipment is facilitated; an auxiliary light source is provided to improve the brightness of a shadow portion, reveal details and reduce image contrast.

Description

Technical Field

[0001] This invention belongs to the field of in-service inspection technology for nuclear power plants, specifically relating to a foreign object inspection tool for the water chamber of a steam generator based on panoramic and multi-type light. Background Technology

[0002] Steam generators play a crucial role in the operation of nuclear power plants and are an important part of the safe operation of nuclear power plants. Ensuring the safe operation of steam generators is one of the issues that nuclear power production departments pay close attention to.

[0003] The current method for inspecting the water chamber of an evaporator generator involves first fixing a camera to a long pole, then having a worker hold the pole and lower the camera into the water chamber through the manhole. The worker then controls the camera via a control cable to inspect the interior of the water chamber. While this method was adequate before service entry, it has many drawbacks during service operation.

[0004] First, the ambient radiation dose at the manhole of the steam generator is very high, reaching about 8 to 12 mSv. This dose level poses a threat to the personal safety of operators and increases the risk of radiation.

[0005] Secondly, the camera can only provide a single white light source and lacks auxiliary light, resulting in poor visibility inside the steam generator water chamber during inspection.

[0006] Third, it is inconvenient to operate. Using a long pole to operate the camera requires certain skills and stability, which increases the difficulty of the inspection personnel's work.

[0007] Fourth, relying solely on staff to inspect the steam generator based on the feedback image information presents numerous uncertainties, such as the inspectors' subjective emotions, subjective perceptions, and lack of concentration due to insufficient sleep. Summary of the Invention

[0008] The purpose of this invention is to provide a foreign object inspection tool for the water chamber of a steam generator based on panoramic and multi-type light. Its structure is simple and convenient, which can not only improve the work efficiency of on-site operations, but also protect and reduce the overall radiation level of workers.

[0009] The technical solution of the present invention is as follows: A foreign object inspection tool for the water chamber of a steam generator based on panoramic and multi-type light, including an image acquisition device, an operating rod and a fixing device, wherein the operating rod is fixed on the fixing device and one end of the operating rod is connected to the image acquisition device.

[0010] The image acquisition device includes a camera and multi-type color light strips.

[0011] The operating rod has a non-slip toothed strip.

[0012] The aforementioned fixing device is used to connect to the manhole of the steam generator and serves to fix the operating rod.

[0013] The fixing device includes a support rod, one end of which is fixedly connected to a U-shaped hook by fastening bolts and a clamping plate. A circular buckle is connected to one end of the support rod, and a telescopic rod is fitted inside the circular buckle. A U-shaped hook is connected to the lower end of the telescopic rod, and a fixing bolt is connected to the U-shaped hook. A flange is also fixed to the end of the support rod, and bolt holes are opened on the flange. The flange is fixed to the manhole of the steam generator through the bolt holes.

[0014] The clamping plate has multiple circular holes, through which the orientation of the U-shaped hook can be fixed or changed.

[0015] The U-shaped hook has a symmetrical structure.

[0016] The bottom of the U-shaped hook has a thin rubber pad.

[0017] The beneficial effects of this invention are as follows: it reduces the amount of operation to a certain extent; when not in operation, workers are kept away from the manhole, thus reducing radiation; it deploys intelligent image recognition algorithms to improve work efficiency and accuracy; it increases reliability and maintainability, which is beneficial for the later maintenance of the equipment; and it provides auxiliary light sources, which can improve the brightness of shadowed areas, reveal details, and reduce image contrast. Attached Figure Description

[0018] Figure 1 A schematic diagram of a foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the fixing device structure.

[0020] In the diagram: 1 Image acquisition device, 2 Fixing device, 3 Operating rod, 4 Multi-type color light strip, 5 Anti-slip fine toothed strip, 6 U-shaped hook, 7 Fixing bolt, 8 Telescopic rod, 9 Circular buckle, 10 Bolt hole, 11 Flange, 12 Support rod, 13 Fastening bolt, 14 Circular hole. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The present invention provides a foreign object inspection tool for steam generator water chambers based on panoramic and multi-type light, which can better inspect the steam generator of the unit for foreign objects, improve detection efficiency, and make convenient upgrades to the design of the steam generator inspection equipment currently in use, which has many shortcomings.

[0023] like Figure 1 As shown, a foreign object inspection tool for the water chamber of a steam generator based on panoramic and multi-type light includes an image acquisition device 1, an operating rod 3, and a fixing device 2. The operating rod 3 is fixed on the fixing device 2, and one end of the operating rod 3 is connected to the image acquisition device 1.

[0024] The image acquisition device 1 includes a camera and a multi-color light strip 4. The camera can focus according to instructions to acquire high-definition video. It also has an image recognition module deployed in the computer-based video display software, which can analyze the video frame by frame, automatically detect foreign objects inside the evaporator water chamber, detect minute deviations that are imperceptible to the human eye, or compensate for the interference of subjective emotional fluctuations of the inspectors, thereby improving inspection efficiency and accuracy. In addition, the camera should be able to rotate 360 ​​degrees to eliminate blind spots in the inspection view. The camera light source of the image acquisition device 1 can provide more than 1000 Lux of illumination within 0.2m. Under sufficient illumination, the probability of missing defects and displays is smaller, and the brightness of the light source can be adjusted according to the on-site conditions. The multi-color light strip is installed on the operating rod near the camera end. It can emit other colors of light, which can increase the brightness of shadow areas, reduce image contrast, and improve video quality. During operation, the camera light source and the multi-color light strip are turned on normally. Then, according to the site conditions, the color of the multi-color light source is adjusted so that the brightness and field of vision at a certain position or angle in the water chamber of the steam generator are optimal. The operating rod 3 has an anti-slip fine toothed strip 5 and is connected to the multi-color light strip 4.

[0025] like Figure 2 As shown, the fixing device 2 is used to connect to the manhole of the steam generator and serves to fix the operating rod 3. It includes a support rod 12, one end of which is fixedly connected to a U-shaped hook 6 via a fastening bolt 13 and a clamping plate. The clamping plate has multiple circular holes 14; in this embodiment, there are seven circular holes 14. The orientation of the U-shaped hook 6 can be fixed or changed through different circular holes 14. One end of the support rod 12 is connected to a circular buckle 9, inside which a telescopic rod 8 is fitted. The lower end of the telescopic rod 8 is connected to the U-shaped hook 6, and a fixing bolt 7 is connected to the U-shaped hook 6. The U-shaped hook 6 and the fixing bolt 7 are the places to fix the operating rod 3. The U-shaped hook 6 adopts a symmetrical structure, allowing for easy adjustment of the position of the operating rod 3 according to on-site work needs. The bottom of the U-shaped hook 6 has a thin rubber pad, which increases the friction between the hook and the anti-slip toothed strip of the operating rod 3 and prevents the operating rod 3 from sliding. The telescopic rod 8 is a joint structure. According to the work requirements, the length of the telescopic rod can be shortened and the position can be locked with a round buckle 9. A flange 11 is also fixed at the end of the support rod 12. The flange 11 has bolt holes 10. The fixing device 2 uses bolts to fix the flange 11 to the manhole of the steam generator through the bolt holes 10.

[0026] The working process of this invention is as follows:

[0027] When the internal conditions of the nuclear island are met, the flange 11 should first be fixed to the manhole of the steam generator with bolts through the bolt holes 10. Then, the operating rod 3 connecting the image acquisition device 1 should be fixed to the U-shaped hook to ensure that the anti-slip fine gear 5 is in full contact with the rubber pad at the bottom of the U-shaped hook to maximize the friction. Then, the height of the operating rod 3 should be adjusted by adjusting the telescopic rod 8, and the direction of the operating rod 3 should be adjusted by adjusting the force holes of the seven circular holes 14.

[0028] After installation, ensure that the image acquisition device 1, fixing device 2, operating rod 3, and other small parts and wires are connected and installed correctly, without any misconnections or looseness. Once confirmed to be normal, turn on the power switch and check the video quality from the camera to ensure the light source is properly adjusted. After everything is ready, you can begin inspecting the water chamber of the steam generator for foreign objects.

Claims

1. A tool for inspecting foreign objects in the water chamber of a steam generator based on panoramic and multi-type light, characterized in that: It includes an image acquisition device, an operating rod, and a fixing device. The operating rod is fixed to the fixing device, and one end of the operating rod is connected to the image acquisition device.

2. The foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 1, characterized in that: The image acquisition device includes a camera and multi-type color light strips.

3. The foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 1, characterized in that: The operating rod has a non-slip toothed strip.

4. The foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 1, characterized in that: The aforementioned fixing device is used to connect to the manhole of the steam generator and serves to fix the operating rod.

5. A foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 4, characterized in that: The fixing device includes a support rod, one end of which is fixedly connected to a U-shaped hook by fastening bolts and a clamping plate. A circular buckle is connected to one end of the support rod, and a telescopic rod is fitted inside the circular buckle. A U-shaped hook is connected to the lower end of the telescopic rod, and a fixing bolt is connected to the U-shaped hook. A flange is also fixed to the end of the support rod, and bolt holes are opened on the flange. The flange is fixed to the manhole of the steam generator through the bolt holes.

6. The foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 5, characterized in that: The clamping plate has multiple circular holes, through which the orientation of the U-shaped hook can be fixed or changed.

7. A foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 5, characterized in that: The U-shaped hook has a symmetrical structure.

8. A foreign object inspection tool for a steam generator water chamber based on panoramic and multi-type light as described in claim 5, characterized in that: The bottom of the U-shaped hook has a thin rubber pad.

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