Fuel rod oxidation film measuring device

Abstract

The invention relates to a fuel rod oxidation film measuring device which comprises a measuring probe and a self-adaptive adjusting mechanism. The measuring probe is mounted on the self-adaptive adjusting mechanism, and the relative position of the measuring probe and the oxidation film on the fuel rod is adjusted through the self-adaptive adjusting mechanism so as to measure the thickness of the oxidation film; the self-adaptive adjusting mechanism comprises a mounting seat, a rotating structure, a swinging assembly, a first moving guide structure and a second moving guide structure; the measuring probe is installed on the swing assembly. The rotating structure is arranged on the mounting seat and is connected with the measuring probe; the swinging assembly is rotationally connected with the rotating structure; the first moving guide structure is connected with the mounting seat; the second movement guiding structure is connected with the first movement guiding structure so that the measuring probe can move and guide in the feeding direction. The fuel rod oxidation film measuring device solves the problem of measuring the thickness of the oxidation film on the surface of the fuel rod in a high-radioactivity environment, and realizes automatic positioning.

Description

Technical Field

[0001] This invention relates to the field of nuclear fuel detection technology, and more particularly to a device for measuring the oxide film on fuel rods. Background Technology

[0002] After several combustion cycles, a dense oxide film forms on the surface of the fuel rods. This oxide film hinders heat transfer during fuel rod combustion, causing distortion in core temperature monitoring during reactor operation and threatening the safe operation of the reactor. In related technologies, fuel rods are usually in a highly radioactive environment, making it difficult to measure the thickness of the oxide film manually, and it is also difficult to ensure the safety of the measurement process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fuel rod oxide film measuring device that can solve the above-mentioned technical problem.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to construct a fuel rod oxide film measuring device, including a measuring probe and an adaptive adjustment mechanism; the measuring probe is installed on the adaptive adjustment mechanism, and the relative position of the probe and the oxide film on the fuel rod is adjusted by the adaptive adjustment mechanism to measure the thickness of the oxide film; The adaptive adjustment mechanism includes a mounting base, a rotating structure, a swing assembly, a first moving guide structure, and a second moving guide structure; the measuring probe is mounted on the swing assembly; the rotating structure is disposed on the mounting base and connected to the measuring probe; the swing assembly is rotatably connected to the rotating structure, causing the measuring probe to swing adaptively; the first moving guide structure is connected to the mounting base to guide the measuring probe to move in a direction perpendicular to the feed direction; the second moving guide structure is connected to the first moving guide structure to guide the measuring probe to move in the feed direction.

[0005] Preferably, the rotating structure includes a first bracket and a bearing; the bearing is mounted on the mounting base, and the first bracket includes a hollow rotating shaft, which is partially inserted into the bearing and coaxially arranged with the bearing; The measuring probe is connected to the first bracket.

[0006] Preferably, the rotating structure further includes a first elastic component, which is connected to the first bracket to enable the first bracket to rotate adaptively; The first bracket includes a frame body that is opposite to and spaced apart from the mounting base, and the pivot is disposed on the side of the frame body facing the mounting base; the frame body has a first extension protrusion and a second extension protrusion extending toward the mounting base on two opposite sides. The first elastic component includes a second support, a first elastic element, and a second elastic element; The second bracket is mounted on the mounting base and extends toward the first bracket along the axial direction of the rotating shaft; The first elastic element is connected to the second bracket and the first extended protrusion; The second elastic element is connected to the second bracket and the second extended protrusion.

[0007] Preferably, the swing assembly includes a swing frame, which is disposed on the side of the first bracket away from the mounting base and is rotatably connected to the first bracket; The measuring probe is mounted on the swing frame and extends out from the side of the swing frame away from the first support.

[0008] Preferably, the swing frame includes a mounting part and swing arms disposed on two opposite sides of the mounting part; the mounting part is spaced apart from the first bracket, and the measuring probe is mounted on the mounting part; The swing arm is rotatably connected to the first bracket.

[0009] Preferably, the swing assembly further includes a second elastic component; the second elastic component is disposed between the swing frame and the first support.

[0010] Preferably, the swing frame is provided with a protective rod assembly that cooperates with the fuel rod on the side facing away from the first support; The rod protection assembly includes a rod protection wheel, which is spaced apart from the measuring probe along the axial direction of the fuel rod; the rod protection wheel is provided with a positioning groove in the circumferential direction for positioning the fuel rod.

[0011] Preferably, the first moving guide structure includes a mounting plate, a guide rail, and a slider; the guide rail is disposed on the mounting plate perpendicular to the feeding direction; the slider is sleeved on the guide rail and connected to the mounting base. The first moving guide structure further includes a third elastic component, which is connected to the mounting plate and the mounting base.

[0012] Preferably, the second moving guide assembly includes a base, a guide rod, and a sliding frame; the guide rod is mounted on the base along the feeding direction, and the sliding frame is slidably mounted on the guide rod and connected to the second moving guide assembly.

[0013] Preferably, the fuel rod oxide film measuring device further includes a video monitoring component, which is mounted on the mounting base; And / or, the fuel rod oxide film measuring device further includes a measuring reference probe, which is mounted on the oscillating assembly.

[0014] The fuel rod oxide film measuring device of the present invention has the following beneficial effects: The device mounts the measuring probe on an adaptive adjustment mechanism, drives the measuring probe to rotate adaptively via a rotating structure, and connects the oscillating component to the rotating structure to allow the measuring probe to oscillate adaptively. A first moving guide structure guides the measuring probe to move in a direction perpendicular to the feed direction, and a second moving guide structure connects to the first to guide the measuring probe to move in the feed direction. This achieves adaptive adjustment of the relative position of the measuring probe to the oxide film on the fuel rod, enabling the measurement of the oxide film thickness. This solves the problem of measuring the oxide film thickness on the surface of fuel rods in a high-radioactivity environment and achieves automatic positioning, offering advantages such as high positioning accuracy and simple operation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram illustrating the state of the fuel rod oxide film measured by the fuel rod oxide film measuring device in some embodiments of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the fuel rod oxide film measuring device; Figure 3 yes Figure 1 A partial exploded view of the structure of the fuel rod oxide film measuring device; Figure 4 yes Figure 3 A partial structural schematic diagram of the fuel rod oxide film measuring device; Figure 5 yes Figure 4 A partial exploded view of the structure of the fuel rod oxide film measuring device; Figure 6 yes Figure 5 A schematic diagram of the first support structure of the fuel rod oxide film measuring device; Figure 7 yes Figure 5 Another partial structural schematic diagram of the fuel rod oxide film measuring device; Figure 8 yes Figure 3 A schematic diagram of the second moving guide assembly of the fuel rod oxide film measuring device; Figure 9 yes Figure 3 A schematic diagram of the video monitoring component structure of the fuel rod oxide film measuring device. Detailed Implementation

[0016] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing the technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on the present invention.

[0017] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0018] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0019] Figure 1 Some preferred embodiments of the fuel rod oxide film measuring device of the present invention are shown. This fuel rod oxide film measuring device is mainly used to measure the growth of the oxide film thickness on the surface of fuel rods 100 after combustion cycles, providing necessary data support for core temperature monitoring during reactor operation and the development of new fuel rods.

[0020] like Figure 1 and Figure 2As shown, in some embodiments, the fuel rod oxide film measuring device may include a measuring probe 10 and an adaptive adjustment mechanism 20. The measuring probe 10 is mounted on the adaptive adjustment mechanism 20, and its relative position with the oxide film of the fuel rod 100 can be adjusted by the adaptive adjustment mechanism 20 to measure the thickness of the oxide film.

[0021] like Figures 3 to 5 As shown, in some embodiments, the measuring probe 10 can be longitudinally arranged, which can contact the oxide film on the surface of the fuel rod 100 and be compressed to achieve the measurement of the oxide film on the fuel rod 100. The measuring probe 10 can be a conventional ultrasonic measuring probe, and in some embodiments, the measuring probe 10 can also be other existing sensors or measuring instruments for measuring thickness.

[0022] In some embodiments, the adaptive adjustment mechanism 20 may include a mounting base 21, a rotating structure 22, a swing assembly 23, a first moving guide structure 25, and a second moving guide structure 26. The measuring probe 10 may be mounted on the swing assembly 23. The rotating structure 22 is disposed on the mounting base 21 and connected to the measuring probe 10. The swing assembly 23 may be rotatably connected to the rotating structure 22, allowing the measuring probe 10 to swing adaptively. The first moving guide structure 25 may be connected to the mounting base 21 to guide the measuring probe 10 in a direction perpendicular to the feed direction. The second moving guide structure 26 may be connected to the first moving guide structure 25, and it guides the measuring probe in the feed direction.

[0023] In some embodiments, the mounting base 21 may include a main body 211 and a support 212, the main body 211 being disposed on the support 212, and the support 212 supporting the main body 211. The main body 211 may be a hollow cylindrical structure with both ends extending through it. In some embodiments, the cross-section of the main body 211 may be approximately square. The support 212 may be connected and fixed to the first movable guide structure 26. The support 212 may be integrally formed with the main body 211.

[0024] like Figures 4 to 6 As shown, in some embodiments, the rotating structure 22 may include a first bracket 221 and a bearing 223. The bearing 223 may be mounted on the mounting base 21. Specifically, the bearing 223 may be mounted in the main body 211 and may be coaxially arranged with the main body 211. The first bracket 221 is rotatably connected to the mounting base 21.

[0025] In some embodiments, the first bracket 221 may include a frame 2211 that is opposite to and spaced apart from the mounting base 21, and the frame 2211 may be opposite to and spaced apart from the main body 211. The frame 2211 is generally flat. The first bracket 221 also includes a hollow rotating shaft 2212, which may be disposed on the side of the frame 2211 facing the mounting base 21. The rotating shaft 2212 may be partially inserted into the bearing 223 and coaxially disposed with the bearing 223, thereby enabling rotation and causing the first bracket 221 to rotate as a whole, which in turn drives the measuring probe 10 to rotate. In some embodiments, the rotating shaft 2212 may be a longitudinally elongated cylindrical structure with two ends.

[0026] In some embodiments, the first bracket 221 is provided with a first through hole 2213, which can be disposed on the frame 2211 and can communicate with the rotating shaft 2212, and can be used for a portion of the measuring probe 10 to pass through. In some embodiments, the first bracket 221 is provided with a second through hole 2214, which can be longitudinally spaced from the first through hole 2213 on the frame 2211, and can be used for a portion of the measuring reference probe 30 to pass through.

[0027] In some embodiments, the frame 2211 has a first extending protrusion 2215 and a second extending protrusion 2216 extending toward the mounting base 21 on two opposite sides. Both the first extending protrusion 2215 and the second extending protrusion 2216 are set at a predetermined angle to the frame 2211, which can be a 90-degree angle. The first extending protrusion 2215 and the second extending protrusion 2216 can be arranged opposite each other and spaced apart.

[0028] In some embodiments, the frame 2211 has two connecting protrusions 2217 extending toward the swing assembly 23 on two opposite sides. The two connecting protrusions 2217 are arranged opposite to each other and spaced apart for connecting with the swing assembly 23.

[0029] In some embodiments, the rotating structure 22 further includes a first elastic component 222, which can be connected to the first bracket 221 so that the first bracket 221 can rotate adaptively, that is, the measuring probe 10 can be rotatably set.

[0030] In some embodiments, the first elastic component 222 may include a second bracket 2221, a first elastic element 2222, and a second elastic element 2223. The second bracket 2221 is mounted on the mounting base 21 and extends axially toward the first bracket 221 along the pivot 2212. The first elastic element 2222 is connected to the second bracket 2221 and the first extending protrusion 2215, and the second elastic element 2223 is connected to the second bracket and the second extending protrusion 2216.

[0031] Specifically, in some embodiments, the second bracket 2221 may be longitudinally arranged and may include a support body 222a, wings 222b, and protrusions 222c. The support body 222a is disposed on the top of the main body 211 and extends axially toward the first bracket 221 along the main body 211. The wings 222b are disposed on two opposite sides of the support body 222a and can be connected and fixed to the main body 211 of the mounting base 21 by providing a connecting assembly. In some embodiments, the connecting assembly may be a screw-in assembly. There may be two protrusions 222c, which may be disposed at one end of the support body 222a facing the first bracket 221 and located on two opposite sides of the support body 222a. In other embodiments, the second bracket 2221 may not be limited to the above structure, and the protrusions 222c and / or wings 222b may be omitted.

[0032] In some embodiments, the first elastic element 2222 may be a spring, which may be sleeved on one of the protrusions 222c and abut against the support body 222a and the first extended protrusion 2215. In other embodiments, the first elastic element 2222 may not be limited to a spring, and may be a tension spring.

[0033] In some embodiments, the second elastic element 2223 may be a spring, which may be sleeved on another protrusion 222c and abut against the support body 222a and the second extended protrusion 2216. In other embodiments, the second elastic element 2223 may not be limited to a spring, and may be a tension spring.

[0034] like Figure 4 , Figure 5 and Figure 7 As shown, in some embodiments, the swing assembly 23 may include a swing frame 231, which may be disposed on the side of the first bracket 221 away from the mounting base 21 and may be rotatably connected to the first bracket 221. The measuring probe 10 may be mounted on the swing frame 231 and protrude from the side of the swing frame 231 opposite to the first bracket 221. By configuring the swing assembly 23, the measuring probe 10 can swing in an axial direction perpendicular to the rotating shaft 2212.

[0035] In some embodiments, the swing frame 231 may include a mounting portion 2311 and swing arms 2312 disposed on two opposite sides of the mounting portion 2311. In some embodiments, the mounting portion 2311 is spaced apart from the first bracket 221. The measuring probe 10 is mounted on the mounting portion 2311, and the swing arms 2312 are rotatably connected to the first bracket 221.

[0036] Specifically, the mounting part 2311 may be generally flat, and the mounting part 2311 is provided with a first through hole corresponding to the measuring probe 10 for the measuring probe 10 to pass through. The mounting part 2311 is also provided with a second through hole for the measuring reference probe 30 to pass through.

[0037] The swing arm 2312 can be connected to the connecting protrusion 2217 of the first bracket 221 via a connecting shaft 233, and is rotatably connected thereto, thereby driving the measuring probe 10 to swing. In some embodiments, the swing arm 2312 and the mounting part 2311 can be integrally formed.

[0038] In some embodiments, the swing assembly 23 further includes a second elastic component 232 disposed between the swing frame 231 and the first support 221. The second elastic component 232 allows the measuring probe 10 to swing adaptively. In some embodiments, the second elastic component 232 can be in two sets, disposed on opposite sides of the measuring probe 10. The two sets of second elastic components 232 can be arranged perpendicular to the axial direction of the measuring probe 10. In other embodiments, the second elastic component 232 is not limited to two sets; it can be one set or more than two sets.

[0039] In some embodiments, the second elastic component 232 can be a spring, and the swing frame 231 includes a positioning post 2313, which is disposed on the side of the mounting portion 2311 facing the first bracket 221 and extends toward the first bracket 221. There can be two positioning posts 2313, and the two positioning posts 2313 can be arranged one-to-one with two sets of second elastic components 232. In some embodiments, there can be one or more sets of positioning posts 2313, and the specific number can be adapted to the second elastic components 232. The second elastic component 232 is sleeved on the corresponding positioning post 2313, with one end abutting against the mounting portion 2311 and the other end abutting against the first bracket 221.

[0040] In some embodiments, a protective rod assembly 24 that cooperates with the fuel rod 100 is provided on the side of the swing frame 231 facing away from the first support 221. By providing the protective rod assembly 24, the fuel rod 100 can be easily fixed and positioned, thereby improving the measurement accuracy of the measuring probe 10.

[0041] In some embodiments, the guard rod assembly 24 may be in two sets, which may be disposed on two opposite sides of the measuring probe 10 and located in a direction perpendicular to the axis of the measuring probe 10. In other embodiments, the guard rod assembly 24 may not be limited to two sets, and may be in one set or more than two sets.

[0042] In some embodiments, the rod protector assembly 24 may include a mounting bracket 241 and a rod protector wheel 242. The mounting bracket 241 may be mounted on the mounting portion 2311 and may be fixedly disposed with the mounting portion 2311. In some embodiments, the mounting bracket 241 and the mounting portion 2311 may be integrally formed. The rod protector wheel 242 and the measuring probe 10 are spaced apart axially from each other on the fuel rod 100. The wheel 242 is rotatably disposed on the mounting bracket 241 and may be disposed toward the fuel rod 100, into which the fuel rod 100 may be engaged. In some embodiments, the rod protector wheel 242 has a circumferentially provided positioning groove 2421, which may cooperate with the fuel rod 100 for positioning the fuel rod 100. In some embodiments, the positioning groove 2421 may at least partially be located on the same straight line as the measuring probe 10.

[0043] In some embodiments, a fixing structure 25 is provided on the side of the mounting part 2311 facing away from the first bracket 221. The fixing structure 25 is disposed between the two sets of guard wheel assemblies 24 and is used for mounting and fixing the measuring probe 10. In some embodiments, the fixing structure 25 can be a ring-shaped clamping structure, which can clamp and fix the measuring probe 10.

[0044] In some embodiments, the first movable guide structure 26 may include a mounting plate 261, a guide rail 262, and a slider 263. The mounting plate 261 may be mounted on the second movable guide assembly 27. The guide rail 262 may be disposed on the mounting plate 261 along the vertical feed direction and may be fixedly disposed with the mounting plate 261. The slider 263 is sleeved on the guide rail 261 and connected to the mounting base 21.

[0045] In some embodiments, the first moving guide structure further includes a third elastic component 264, which is connected to the mounting plate 261 and the mounting base 21. In some embodiments, the third elastic component 264 may be in two sets, which may be positioned on opposite sides of the slider 263. By configuring the third elastic component 264, the measuring probe 10 can move adaptively. In some embodiments, the third elastic component 264 is not limited to two sets; it may be one set or more than two sets. Each third elastic component 264 may include a tension spring. In other embodiments, the third elastic component 264 may not be limited to a tension spring and may be other elastic structures.

[0046] In some embodiments, the mounting plate 261 may be provided with connecting posts 265, which may be in two sets, each corresponding to one of the two sets of third elastic components 264. Each connecting post 265 has a connecting hole 2651, which can be used to connect to the third elastic component 264.

[0047] like Figure 8As shown, in some embodiments, the second moving guide assembly 27 may include a base 271, a guide rod 272, and a sliding frame 274. In some embodiments, the base 271 may be generally cuboid in shape, and may include a seat 2711 and two connecting portions 2712 disposed on the seat 2711, the two connecting portions 2712 being spaced apart along the length direction of the seat 2711. The guide rod 272 may be mounted on the base 271 along the feeding direction, specifically, both ends of the guide rod 272 may be respectively connected and fixed to the two connecting portions 2712. In some embodiments, there may be two guide rods 272. It is understood that in some other embodiments, the guide rod 272 may not be limited to two, and may be one or more. The two guide rods 272 may be spaced apart along the width direction of the base 271. In some embodiments, the sliding frame 273 may be slidably mounted on the guide rod 272 and may be connected to the first moving guide structure 26. Specifically, the sliding frame 274 may be connected and fixed to the mounting plate 261.

[0048] In some embodiments, the second moving guide assembly 27 further includes a fourth elastic component 274, which may be disposed between the sliding frame 273 and the connecting portion 2712 located away from the fuel rod 100, allowing the sliding frame 273 to slide adaptively. In some embodiments, the fourth elastic component 274 may be a spring, and the connecting portion 2712 is provided with a fixing post 275 extending toward the sliding frame 273. The fourth elastic component 274 may be sleeved on the fixing post 275 and may abut against the sliding frame 273 and the connecting portion 2712. In some embodiments, the fixing post 275 may be omitted.

[0049] In some embodiments, the fuel rod oxide film measuring device further includes a measurement reference probe 30, which is mounted on the swing assembly 23, specifically on the swing frame 231 and fixed by the fixing structure 25. The measurement reference probe 30 may be spaced axially from the measurement probe 10 of the fuel rod 100. The measurement reference probe 30 can be used to measure the oxide film of the fuel rod 100 and / or the temperature, water pressure, pH value, and radiation dose of the environment in which the fuel rod 100 is located, providing environmental factors as a reference for the measurement probe 10. In some embodiments, the measurement reference probe 30 may be omitted.

[0050] like Figure 9As shown, in some embodiments, the fuel rod oxide film measuring device further includes a video monitoring component 40, which can be mounted on the mounting base 21 and can be used to perform preliminary calibration of the measuring probe 10. In some embodiments, the video monitoring component 40 may include a support frame 41, a support column 42 mounted on the support frame 41, and a camera 43 mounted on the support column 42. The camera 43 may be connected to the support column 42 via a connecting and fixing component 44, and it is rotatable to facilitate angle adjustment.

[0051] For example Figure 1 and Figure 2 As shown, before measuring the fuel rod 100, the fuel rod oxide film measuring device first uses the video monitoring component 40 to perform preliminary correction on the measuring probe 10, so that the measuring probe 10 is roughly aligned with the central axis of the fuel rod 100 being measured. The measuring probe 10 is slowly fed in, and the measuring probe 10 first contacts the surface of the fuel rod 100 being measured and is compressed. When the measuring probe 10 continues to advance, the fuel rod 100 will be stuck in the upper and lower guard rod wheels 242. During this process, the four degrees of freedom set will work together to actively correct the measuring probe 10 again. The measuring probe 10 continues to advance, causing the second moving guide component to be triggered at the set distance position, and the measuring probe 10 stops feeding. At this time, the measurement data of the measuring probe 10 is read. Then the measuring probe 10 is retracted to the initial state, and the measurement of the oxide film thickness on the surface of the fuel rod 100 is completed.

[0052] To accommodate the measurement of fuel assemblies, the fuel rod oxide film measuring device is equipped with four degrees of freedom: forward and backward movement, left and right movement, oscillation, and rotation. Each degree of freedom corresponds to a relative position state of the fuel rod, and the four degrees of freedom working together can handle various relative position states of the fuel rod 100.

[0053] By setting a second moving guide component, the measuring probe 10 can move back and forth, thereby allowing the measuring probe 10 to quickly approach the fuel rod being measured. During measurement, the measuring probe 10 is compressed to ensure the accuracy of the measurement data.

[0054] By setting the first moving guide structure, the measuring probe 10 can move left and right. By moving left and right, when there is a slight deviation in the alignment of the measuring probe 10 with the fuel rod, the rod guard wheel 242 can automatically correct the alignment of the measuring probe 10 with the fuel rod being measured.

[0055] By setting the swing component 23, the measuring probe 10 can be tilted and rotated, and by setting the rotation structure 22, the measuring probe 10 can be rotated left and right, thereby adapting to the position of the fuel rod being measured. When the fuel rod 100 is slightly tilted around the vertical center, the swing component 23 and the rotation structure 22 will actively make the measuring probe 10 adapt to the fuel rod being measured.

[0056] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A fuel rod oxide film measuring device, characterized in that, It includes a measuring probe (10) and an adaptive adjustment mechanism (20); the measuring probe (10) is mounted on the adaptive adjustment mechanism (20), and the adaptive adjustment mechanism (20) adjusts its relative position with the oxide film on the fuel rod (100) to measure the thickness of the oxide film; The adaptive adjustment mechanism (20) includes a mounting base (21), a rotating structure (22), a swing assembly (23), a first moving guide structure (26), and a second moving guide structure (27); the measuring probe (10) is mounted on the swing assembly (23); the rotating structure (22) is disposed on the mounting base (21) and connected to the measuring probe (10); the swing assembly (23) is rotatably connected to the rotating structure (22), so that the measuring probe (10) swings adaptively; the first moving guide structure (26) is connected to the mounting base (21) to guide the measuring probe (10) to move in a direction perpendicular to the feed direction; the second moving guide structure (27) is connected to the first moving guide structure (26) to guide the measuring probe (10) to move in the feed direction.

2. The fuel rod oxide film measuring device according to claim 1, characterized in that, The rotating structure (22) includes a first bracket (221) and a bearing (223); the bearing (223) is mounted on the mounting base (21), and the first bracket (221) includes a hollow rotating shaft (2212) and is partially inserted into the bearing (223) and coaxially arranged with the bearing (223); The measuring probe (10) is connected to the first bracket (221).

3. The fuel rod oxide film measuring device according to claim 2, characterized in that, The rotating structure (22) further includes a first elastic component (222), which is connected to the first bracket (221) so that the first bracket (221) rotates adaptively; The first bracket (221) includes a frame (2211) that is opposite to and spaced apart from the mounting base (21), and the pivot (2212) is located on the side of the frame (2211) facing the mounting base (21); the frame (2211) has a first extension protrusion (2215) and a second extension protrusion (2216) extending toward the mounting base (21) on two opposite sides. The first elastic component (222) includes a second bracket (2221), a first elastic element (2222), and a second elastic element (2223); The second bracket (2221) is mounted on the mounting base (21) and extends toward the first bracket (221) along the axial direction of the pivot (2212); The first elastic element (2222) is connected to the second bracket (2221) and the first extension protrusion (2215); The second elastic element (2223) is connected to the second bracket (2221) and the second extension protrusion (2216).

4. The fuel rod oxide film measuring device according to claim 2, characterized in that, The swing assembly (23) includes a swing frame (231), which is disposed on the side of the first bracket (221) away from the mounting base (21) and is rotatably connected to the first bracket (221); The measuring probe (10) is mounted on the swing frame (231) and extends out from the side of the swing frame (231) away from the first support (221).

5. The fuel rod oxide film measuring device according to claim 4, characterized in that, The swing frame (231) includes a mounting part (2311) and swing arms (2312) disposed on two opposite sides of the mounting part (2311); the mounting part (2311) is spaced apart from the first bracket (221), and the measuring probe (10) is mounted on the mounting part (2311); The swing arm (2312) is rotatably connected to the first bracket (221).

6. The fuel rod oxide film measuring device according to claim 4, characterized in that, The swing assembly (23) further includes a second elastic component (232); the second elastic component (232) is disposed between the swing frame (231) and the first support (221).

7. The fuel rod oxide film measuring device according to claim 4, characterized in that, The swing frame (231) is provided with a guard rod assembly (24) that cooperates with the fuel rod (100) on the side facing away from the first support (221). The rod protection assembly (24) includes a rod protection wheel (242), which is spaced apart from the measuring probe (10) in the axial direction of the fuel rod (100); the rod protection wheel (242) is provided with a positioning groove (2421) in the circumferential direction for positioning the fuel rod (100).

8. The fuel rod oxide film measuring device according to claim 1, characterized in that, The first moving guide structure (26) includes a mounting plate (261), a guide rail (262), and a slider (263). The guide rail (262) is disposed on the mounting plate (261) perpendicular to the feeding direction. The slider (263) is sleeved on the guide rail (262) and connected to the mounting base (21). The first moving guide structure (26) further includes a third elastic component (264), which is connected to the mounting plate (261) and the mounting base (21).

9. The fuel rod oxide film measuring device according to claim 1, characterized in that, The second moving guide structure (26) includes a base (271), a guide rod (272), and a sliding frame (273); the guide rod (272) is mounted on the base (271) along the feeding direction, and the sliding frame (273) is slidably mounted on the guide rod (272) and connected to the second moving guide structure (26).

10. The fuel rod oxide film measuring device according to claim 1, characterized in that, The fuel rod oxide film measuring device also includes a video monitoring component (40), which is mounted on the mounting base (21); And / or, the fuel rod oxide film measuring device further includes a measuring reference probe (30) mounted on the oscillating assembly (23).

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