Core barrel extraction mechanism

Abstract

The present application relates to a kind of core high probe extraction mechanism, which provides effective radiation protection during the removal of the probe by introducing a shielding cylinder, significantly reduces the radiation dose that can be received by the operator when working, improves the safety of the working environment.Secondly, the present application also configures a positioning connection device with a positioning camera, which can monitor and adjust the position of the lifting moving assembly in real time, ensure its accurate alignment with the probe to be removed, and avoid positional interference between the shielding cylinder and other structural members in the core during the gradual deepening of the shielding cylinder into the core pool, thereby solving the problem of difficult accurate docking in traditional methods, improving the probe removal efficiency and operation safety.

Description

Technical Field

[0001] This invention relates to the field of nuclear power, and more particularly to a core high-level radioactive detector extraction mechanism. Background Technology

[0002] During the long-term operation of a nuclear power plant, the reactor core is equipped with various detectors to monitor its operating parameters. After prolonged exposure to high radiation, these detectors accumulate large amounts of radioactive nuclides, becoming highly radioactive components. When maintenance or replacement of these detectors is required, their disassembly and handling present significant challenges due to their intense radioactivity.

[0003] First, due to the high level of radioactivity in the detector, it is difficult to maintain effective shielding, which poses a potential radiation exposure risk to operators, making detector removal highly dangerous. Second, the lifting mechanism used to pull out the detector has difficulty accurately aligning with the detector's removal and connection position when descending to a position where it can be connected. Furthermore, the confined space within the reactor core pool, filled with various structural components, makes the lifting mechanism highly susceptible to positional interference or collisions during its approach to the detector. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a core high-frequency radioactive detector extraction mechanism that can solve the problems of excessive radiation dose during extraction and difficulty in aligning and connecting the lifting mechanism with the detector to be extracted.

[0005] This invention provides a core high-frequency detector extraction mechanism, comprising:

[0006] A shielding device includes a shielding cylinder and a lifting assembly, wherein the shielding cylinder is open at both ends and the lifting assembly is mounted on the shielding cylinder;

[0007] The lifting device includes a lifting moving component, a lifting driving component, and a lifting connecting component. The lifting moving component is slidably disposed within the shielding cylinder, the lifting driving component is disposed outside the shielding cylinder, the lifting driving component is driven and connected to the lifting connecting component, and the lifting connecting component is connected to the lifting moving component.

[0008] The alignment connection device includes an alignment bracket, an alignment camera, and several connecting chains. The alignment bracket is mounted on the lifting and moving assembly, the alignment camera is mounted on the central axis of the alignment bracket, and each of the connecting chains is symmetrically arranged on the alignment bracket. The connecting chains are detachably connected to the end of the detector.

[0009] The lifting driving assembly drives the lifting moving assembly to ascend or descend along the shielding cylinder through the lifting connecting assembly, so that the lifting moving assembly drives the detector to pull out the core through the connecting chains.

[0010] Preferably, the alignment support comprises a connecting ring, a balance frame and a plurality of balance adjusting members, the connecting ring is connected to the lifting moving assembly, one end of each of the balance adjusting members is connected to the connecting ring, and the other end of each of the balance adjusting members is connected to the balance frame.

[0011] The central axis of the connecting ring and the central axis of the balance frame coincide with each other, each of the balance adjusting members is uniformly distributed in a circle around the central axis of the connecting ring, and the alignment camera is arranged in the center of the balance frame.

[0012] Preferably, the balance adjusting member comprises a connecting stud and a plurality of adjusting nuts, one end of each of the connecting studs is arranged in the connecting ring, the other end of each of the connecting studs is arranged in the balance frame, and the adjusting nuts are arranged at both ends of each of the connecting studs, and the adjusting nuts can adjust the distance between the balance frame and the connecting ring when rotating.

[0013] Preferably, the balance adjusting member further comprises an elastic member, the elastic member is sleeved outside the connecting stud, one end of each of the elastic members abuts against the connecting ring, and the other end of each of the elastic members abuts against the balance frame.

[0014] Preferably, the balance frame comprises a cross member, the alignment camera is located at the center of the cross member, and each of the connecting chains is located at the peripheral position of the cross member.

[0015] Preferably, the alignment connecting device comprises two connecting columns, two connecting eye rings, two connecting shackles and two connecting chains, the two connecting columns are symmetrically arranged at the periphery of the cross member, the two connecting eye rings are one-to-one correspondingly arranged on the two connecting columns, the two connecting shackles are one-to-one correspondingly detachably connected to the two connecting eye rings, and the two connecting chains are one-to-one correspondingly connected to the two connecting eye rings, and the two connecting chains are used for connecting the detector.

[0016] Preferably, the lifting moving assembly comprises a lifting main body, a connecting seat and two guide pulley blocks, the lifting main body is located in the shielding cylinder, the two guide pulley blocks are symmetrically arranged on the lifting main body, the two guide pulley blocks are slidingly arranged on the inner wall of the shielding cylinder, the lifting connecting assembly is connected to the top of the lifting main body, the connecting seat is arranged at the bottom of the lifting main body, and the alignment support is connected to the connecting seat.

[0017] Preferably, the lifting driving assembly comprises a lifting base, a lifting motor, a lifting roller, a lifting fixed pulley and a lifting cable, the lifting base is arranged on the outer sidewall of the shielding cylinder, the lifting motor is arranged on the lifting base, the lifting roller is rotatably arranged on the lifting base, the lifting motor is drivingly connected to the lifting roller, the lifting fixed pulley is arranged on the lifting assembly, the lifting cable is wound on the lifting roller, and the end of the lifting cable is connected to the lifting moving assembly after being wound around the lifting fixed pulley.

[0018] The lifting connecting assembly comprises a movable connecting block, two movable arms and two cable fixing wheels, the movable connecting block is rotatably arranged on the lifting moving assembly, the two movable arms are rotatably connected to the movable connecting block, and the two movable arms are symmetrically arranged on the movable connecting block, the two cable fixing wheels are arranged on the two movable arms in one-to-one correspondence, and the lifting driving assembly is drivingly connected to the two cable fixing wheels.

[0019] Preferably, the lifting assembly comprises a lifting base, a lifting frame and two lifting shafts, the lifting base is arranged at the end of the shielding cylinder, the lifting frame is arranged on the lifting base, two connecting ears are arranged on the lifting frame, and the two lifting shafts are arranged on the two connecting ears in one-to-one correspondence, and the two connecting ears are connected with lifting equipment.

[0020] Preferably, the remote observation device comprises an observation screen, a cross alignment mark is arranged on the observation screen, the observation screen is electrically connected to the alignment camera, and the center of the cross alignment mark is coincident with the center of the observation screen.

[0021] The implementation of the present application has the following beneficial effects:

[0022] The present application relates to a kind of core high-extraction mechanism of probe, which provides effective radiation protection in the removal process of probe by introducing shielding cylinder, significantly reduces the radiation dose that operator can receive when working, improves the safety of working environment.

[0023] Secondly, the present application is also configured with alignment connecting device with alignment camera, which can monitor and adjust the position of lifting moving assembly in real time, ensure its accurate alignment connection with the probe to be removed, and in the process of shielding cylinder gradually into the core pool, it can also avoid the position interference between shielding cylinder and other structural members in the core, so as to solve the problem of difficult accurate butt joint in traditional method, improve the probe removal efficiency and operation safety.

[0024] In addition, the lifting device comprises a lifting moving assembly slidingly arranged in the shielding cylinder and a lifting driving assembly arranged outside the shielding cylinder, so that the pulling-out process of the detector can be flexibly controlled without damaging the shielding effect, and the requirements of different positions and angles can be met. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0026] Figure 1 is a structural schematic diagram of a core high-level detector pulling mechanism in some embodiments of the present application;

[0027] Figure 2 is Figure 1 is an exploded view of the core high-level detector pulling mechanism shown in FIG. 1;

[0028] Figure 3 is a partial structural schematic diagram of a core high-level detector pulling mechanism in some embodiments of the present application;

[0029] Figure 4 is a structural schematic diagram of an alignment connecting device in some embodiments of the present application;

[0030] Figure 5 is Figure 4 is an exploded view of the alignment connecting device shown in FIG. 4;

[0031] Figure 6 is a structural schematic diagram of a remote observation device in some embodiments of the present application;

[0032] Figure 7 is a structural schematic diagram of a core high-level detector pulling mechanism and a detector in some embodiments of the present application. DETAILED DESCRIPTION

[0033] Embodiments of the present application will be described in more detail by referring to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.

[0034] It should be understood that, although the terms "first", "second", "third", etc. can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Figure 1 And Figure 2 The core high-level detector extraction mechanism 10 in some embodiments of the present application is shown, which includes shielding device 1, lifting device 2 and alignment connecting device 3, the lifting device 2 is slidingly arranged on the shielding device 1, and the alignment connecting device 3 is arranged on the lifting device 2.

[0038] It can be understood that the shielding device 1 is used to provide necessary radiation protection, to ensure that the safety of the staff is greatly guaranteed during the extraction of the detector 20. The lifting device 2 is responsible for actually performing the extraction action of the detector 20. The alignment connecting device 3 can solve the problem of precise docking which is difficult to achieve in the traditional method, and ensure that the lifting and moving assembly 21 can be smoothly connected to the target detector 20.

[0039] As Figures 1 to 5 shown, the shielding device 1 includes a shielding cylinder 11 and a lifting assembly 12, the shielding cylinder 11 is open at both ends, and the lifting assembly 12 is arranged on the shielding cylinder 11;

[0040] The lifting device 2 comprises a lifting moving assembly 21, a lifting driving assembly 22, and a lifting connecting assembly 23. The lifting moving assembly 21 is slidingly arranged in the shielding cylinder 11. The lifting driving assembly 22 is arranged outside the shielding cylinder 11. The lifting driving assembly 22 is drivingly connected to the lifting connecting assembly 23. The lifting connecting assembly 23 is connected to the lifting moving assembly 21.

[0041] The alignment connecting device 3 comprises an alignment support 31, an alignment camera 32, and a plurality of connecting chains 33. The alignment support 31 is arranged on the lifting moving assembly 21. The alignment camera 32 is arranged on the central axis of the alignment support 31. Each of the connecting chains 33 is symmetrically arranged on the alignment support 31 and is detachably connected to the end of the detector 20. The lifting driving assembly 22 drives the lifting moving assembly 21 to ascend and descend along the shielding cylinder 11 through the lifting connecting assembly 23, so that the lifting moving assembly 21 drives the detector 20 to pull out the core through the connecting chains 33.

[0042] It can be understood that the shielding cylinder 11 is a cylindrical structure with both ends open, and the internal space is sufficient to accommodate the lifting moving assembly 21 and its attached components. The lifting assembly 12 is arranged at the top of the shielding cylinder 11 and is used to lift the entire pulling mechanism into or out of the reactor pit. The lifting assembly 12 can be configured with a safety locking mechanism to ensure stability during lifting. The lifting moving assembly 21 is located inside the shielding cylinder 11 and can slide axially along the shielding cylinder 11. This assembly can be further configured with guide wheels or other similar mechanisms to ensure smooth and accurate movement.

[0043] The lifting driving assembly 22 is installed outside the shielding cylinder 11 and is connected to the lifting connecting assembly 23 through mechanical transmission (such as steel wire rope, chain, etc.) to provide power source for the lifting moving assembly 21. The driving assembly 22 can be an electric motor, a hydraulic pump, etc., and the specific selection depends on the requirements of the application scenario. The lifting connecting assembly 23 transmits the power of the lifting driving assembly 22 to the lifting moving assembly 21, enabling the latter to move up and down in the shielding cylinder 11. In addition, it also plays a fixing role, ensuring the firm and reliable connection between components.

[0044] The alignment support 31 is installed on the lifting moving assembly 21 and serves as a support and fixation for the alignment camera 32. The alignment camera 32 is placed at the central position of the alignment support 31, real-time monitors the surrounding environment, and feeds back image information to the operator, helping to accurately position the detector 20. By adjusting the position of the lifting moving assembly 21, the connecting chains 33 can be accurately connected to the end of the detector 20. Multiple chains are evenly distributed around the alignment support 31, with one end fixed on the support and the other end designed in a quick-connecting form, so as to quickly and stably connect with the detector 20. This design not only ensures the connection strength, but also facilitates disassembly and replacement.

[0045] It should be noted that when the high-level detector 20 in the core needs to be pulled out, the shielding device 1 is first hoisted to a proper position above the core by the hoisting assembly 12 together with the internal lifting device 2. Then the lifting drive assembly 22 is started to lower the lifting moving assembly 21 until it approaches the detector 20. At this time, the operator fine-tunes the position of the lifting moving assembly 21 according to the picture returned by the alignment camera 32 until the connecting chain 33 can be smoothly connected with the end of the detector 20. After confirming the stable connection, the lifting drive assembly 22 is started again to slowly lift the lifting moving assembly 21, thereby driving the detector 20 to rise together to complete the pulling-out operation. Throughout the process, the shielding cylinder 11 plays an important protective role to protect the on-site workers from excessive radiation damage.

[0046] It should also be noted that in the process of pulling out the detector 20, the lifting moving assembly 21 gradually rises along the shielding cylinder to realize the pulling-out of the detector 20, and at the same time, the shielding cylinder 11 gradually descends to further isolate the liquid in the core pool.

[0047] As shown in Figures 3 to 5 In some embodiments of the core high-level detector pulling-out mechanism 10, the alignment support 31 includes a connecting ring 311, a balance frame 312, and a plurality of balance adjusting members 313. The connecting ring 311 is connected to the lifting moving assembly 21, one end of each balance adjusting member 313 is connected to the connecting ring 311, and the other end of each balance adjusting member 313 is connected to the balance frame 312.

[0048] The central axis of the connecting ring 311 and the central axis of the balance frame 312 coincide with each other, and each balance adjusting member 313 is uniformly distributed around the central axis of the connecting ring 311. The alignment camera 32 is arranged through the center of the balance frame 312.

[0049] It can be understood that the connecting ring 311 is directly connected to the lifting moving assembly 21, playing a role of connecting the upper and lower parts. The balance frame 312 is used to support the alignment camera 32 and ensure its stability and accuracy. The plurality of balance adjusting members 313 are distributed between the connecting ring 311 and the balance frame 312, one end of each balance adjusting member 313 is fixed to the connecting ring 311, and the other end is connected to the balance frame 312.

[0050] It should be noted that the center axis of the connecting ring 311 is completely coincident with the center axis of the balance frame 312, ensuring the concentricity of the entire alignment support 31 during work, which helps to improve the positioning accuracy. The plurality of balance adjusting members 313 are uniformly distributed around the center axis of the connecting ring 311, not only enhancing the overall rigidity of the structure, but also enabling balanced distribution of forces in all directions, avoiding tilting or deviation caused by uneven forces. The alignment camera 32 is precisely installed at the center position of the balance frame 312, passing through the center hole, ensuring that the camera optical axis is consistent with the center axis of the connecting ring 311 and the balance frame 312, thereby providing the most accurate visual feedback for the operator, thereby ensuring the accuracy of the butt joint.

[0051] As shown in the drawings, Figures 3 to 5 In some embodiments of the core high-level detector extraction mechanism 10, the balance adjusting member 313 includes a connecting stud 3131 and a plurality of adjusting nuts 3132. Each connecting stud 3131 passes through the connecting ring 311 at one end and the balance frame 312 at the other end. Each connecting stud 3131 is provided with an adjusting nut 3132 at both ends. The adjusting nut 3132 can adjust the distance between the balance frame 312 and the connecting ring 311 when rotated.

[0052] It can be understood that the connecting stud 3131 is the main connecting and adjusting element, and the connecting stud 3131 penetrates between the connecting ring 311 and the balance frame 312. The plurality of adjusting nuts 3132 are used to fine-tune the relative position between the balance frame 312 and the connecting ring 311. One end of each connecting stud 3131 passes through the connecting ring 311, and the other end passes through the balance frame 312, forming a stable mechanical connection. This penetration method not only ensures the firmness of the connection, but also provides a basis for subsequent adjustment. Each connecting stud 3131 is provided with one or more adjusting nuts at both ends. By rotating these nuts, the length of the connecting stud 3131 can be changed, thereby affecting the distance between the balance frame 312 and the connecting ring 311. This design allows the operator to flexibly adjust the distance between the two according to the actual situation, ensuring that the entire alignment support 31 is in the best working state.

[0053] Due to the use of threaded connection, each rotation of the adjusting nut will cause a slight change in position, which enables very precise control of the distance between the balance frame 312 and the connecting ring 311. This is crucial for achieving precise positioning of the alignment camera 32, especially in nuclear facility environments that require high precision.

[0054] As shown in the drawings, Figures 3 to 5As shown, in some embodiments of the high-frequency detector extraction mechanism 10, the balance adjustment member 313 further includes an elastic member 3133. The elastic member 3133 is sleeved on the outside of the connecting stud 3131. One end of each elastic member 3133 abuts against the connecting ring 311, and the other end of each elastic member 3133 abuts against the balance frame 312.

[0055] Understandably, the elastic element 3133 tightly wraps around the outside of the connecting stud 3131, ensuring continuous support between the two. One end of each elastic element 3133 directly contacts and supports the connecting ring 311, while the other end abuts against the balance frame 312. This arrangement allows the elastic element 3133 to apply preload between the connecting ring 311 and the balance frame 312, and permits a certain range of compressive or tensile deformation. The elastic element 3133 provides the necessary preload, ensuring tight contact between the connecting ring 311 and the balance frame 312, while absorbing external vibrations and shocks, reducing unnecessary shaking, and protecting internal components from damage.

[0056] like Figure 4 and Figure 5 As shown, in some embodiments of the high-frequency detector extraction mechanism 10, the balance frame 312 includes a cross-shaped component, with the alignment camera 32 located at the center of the cross-shaped component, and each connecting chain 33 located at the periphery of the cross-shaped component.

[0057] Understandably, the cross-shaped component, as the core part of the balance frame 312, not only provides structural support but also provides mounting positions for other components such as the alignment camera 32 and the connecting chain 33. The alignment camera 32 is located at the center of the cross-shaped component, ensuring that its optical axis is aligned with the central axis of the connecting ring 311 and the balance frame 312, providing the most accurate visual feedback. The connecting chain 33 is evenly distributed around the periphery of the cross-shaped component and is connected to the end of the detector 20 through specific connection mechanisms (such as connecting posts 34, connecting rings 35, and connecting shackles 36).

[0058] like Figure 4 and Figure 5 As shown, in some embodiments of the high-frequency detector extraction mechanism 10 in the reactor core, the alignment connection device 3 includes two connecting posts 34, two connecting rings 35, two connecting shackles 36, and two connecting chains 33. The two connecting posts 34 are symmetrically arranged around the periphery of the cross-shaped component. The two connecting rings 35 are correspondingly arranged on the two connecting posts 34. The two connecting shackles are detachably connected to the two connecting rings 35. The two connecting chains 33 are correspondingly connected to the two connecting rings 35. Both connecting chains 33 are used to connect the detector 20.

[0059] It is understandable that two connecting columns 34 are symmetrically arranged on the periphery of the cross member for supporting and fixing the connecting rings 35. Two connecting rings 35 are correspondingly installed on two connecting columns 34 as transition pieces between the connecting chains 33 and other components. Two connecting shackles 36 are detachably connected to two connecting rings 35 for quick connection or disconnection of the connecting chains 33. One end of each connecting chain 33 is connected to the corresponding connecting ring 35, and the other end is used to connect the end of the detector 20.

[0060] It should be noted that the two connecting columns 34, the connecting rings 35 and the connecting chains 33 are symmetrically distributed around the cross member, which ensures that the force of the entire system is evenly distributed in all directions, improving stability. The use of connecting shackles 36 allows the connecting chains 33 to be quickly and safely connected or disconnected from the detector 20, adapting to the quick response requirements in actual operation. Since the alignment camera 32 is located at the center of the cross member and the connecting chains 33 are located at the periphery, this layout helps to achieve more accurate alignment, ensuring that the connecting chains 33 can be smoothly connected to the detector 20.

[0061] As shown in Figure 4 and Figure 5 In some embodiments of the core high-level detector extraction mechanism 10, the lifting moving assembly 21 includes a lifting body 211, a connecting seat 212 and two guide pulley sets 213. The lifting body 211 is located inside the shielding cylinder 11, and the two guide pulley sets 213 are symmetrically arranged on the lifting body 211. The two guide pulley sets 213 are both slidingly arranged on the inner wall of the shielding cylinder 11. The lifting connecting assembly 23 is connected to the top of the lifting body 211, the connecting seat 212 is arranged at the bottom of the lifting body 211, and the alignment bracket 31 is connected to the connecting seat 212.

[0062] It is understandable that the lifting body 211 is located inside the shielding cylinder 11, and the lifting body 211 is used to provide structural support for the entire assembly and carry the connecting seat 212 and other related equipment. The connecting seat 212 is installed at the bottom of the lifting body 211 and is used to connect the alignment bracket 31, thereby indirectly supporting the balance bracket 312 and its attached components (such as the alignment camera 32 and the connecting chain 33, etc.). The two guide pulley sets 213 are slidingly arranged on the inner wall of the shielding cylinder 11. Each guide pulley set 213 contains multiple pulleys to reduce friction and ensure that the lifting body 211 can smoothly move up and down along the shielding cylinder 11.

[0063] As shown in Figure 1 and Figure 2As shown, in some embodiments of the high-frequency detector extraction mechanism 10, the lifting drive assembly 22 includes a lifting seat 221, a lifting motor 222, a lifting drum 223, a lifting pulley 224, and a lifting cable 225. The lifting seat 221 is disposed on the outer wall of the shielding cylinder 11, the lifting motor 222 is disposed on the lifting seat 221, the lifting drum 223 is rotatably disposed on the lifting seat 221, the lifting motor 222 is driven and connected to the lifting drum 223, the lifting pulley 224 is disposed on the lifting assembly, the lifting cable 225 is wound around the lifting drum 223, and the end of the lifting cable 225 is wound around the lifting pulley 224 and then connected to the lifting moving assembly 21.

[0064] Understandably, the lifting seat 221 is installed on the outer wall of the shielding cylinder 11, providing a stable foundation support for the entire lifting drive assembly 22. The lifting motor 222 is fixed on the lifting seat 221 and serves as a power source, responsible for driving the lifting drum 223 to rotate, thereby realizing the lifting and lowering control of the lifting moving assembly 21. The lifting drum 223 is rotatably mounted on the lifting seat 221 and is directly connected to the lifting motor 222. Its function is to wind and release the lifting cable 225, thereby driving the lifting moving assembly 21 to move up and down. The lifting fixed pulley 224 is set on the lifting seat 121 in the lifting assembly 12 and is used to change the direction of the lifting cable 225 to ensure that it can be smoothly connected to the lifting moving assembly 21. One end of the lifting cable 225 is wound on the lifting drum 223, and the other end of the lifting cable 225 is connected to the lifting moving assembly 21 after passing through the lifting fixed pulley 224. It serves as a medium for force transmission, converting the power generated by the lifting motor 222 into the lifting and lowering action of the lifting moving assembly 21.

[0065] like Figure 3 As shown, in some embodiments of the high-frequency detector extraction mechanism 10, the lifting connection assembly 23 includes a movable connection block 231, two movable arms 232, and two cable fixing wheels 233. The movable connection block 231 is rotatably mounted on the lifting moving assembly 21. The two movable arms 232 are rotatably connected to the movable connection block 231, and the two movable arms 232 are symmetrical to each other on the movable connection block 231. The two cable fixing wheels 233 are correspondingly mounted on the two movable arms 232. The lifting drive assembly 22 is driven and connected to the two cable fixing wheels 233.

[0066] It is understandable that the movable connecting block 231 is rotatably arranged on the lifting moving assembly 21, serving as the core component of the entire lifting connecting assembly 23. It not only provides a mechanical connection point, but also allows a certain degree of rotational freedom to adapt to different angle requirements. Two movable arms 232 are symmetrically rotatably connected to the two sides of the movable connecting block 231. Each movable arm 232 can freely swing within a certain range, ensuring that the cable fixing wheel 233 can adjust the position as needed. Two cable fixing wheels 233 are installed one-to-one on the two movable arms 232, used to fix and guide the lifting cable 225 (from the lifting driving assembly 22). Thus, the lifting cable 225 can smoothly transmit power between different angles and positions.

[0067] As shown in Figure 1 In some embodiments of the spent fuel handling device 1, the lifting assembly 12 includes a lifting seat 121, a lifting bracket 122, and two lifting shafts 123. The lifting seat 121 is arranged at the end of the shielding cylinder 11, the lifting bracket 122 is arranged on the lifting seat 121, and the lifting bracket 122 is provided with two connecting ears 124. The two lifting shafts 123 are arranged one-to-one on the two connecting ears 124, and the two connecting ears 124 are connected to the lifting equipment.

[0068] It is understandable that the lifting seat 121 is used to provide a basic support structure for the entire lifting assembly 12. It not only provides a mechanical connection point, but also enhances the strength of the top of the shielding cylinder 11. The lifting bracket 122 is used to provide a direct support platform for subsequent lifting operations. The lifting bracket 122 is designed with a reasonable structure to disperse the stress and ensure the stability during lifting. The two connecting ears 124 are used to fix the lifting shaft 123 and provide a connection interface for connecting to external lifting equipment. The two lifting shafts 123 are installed one-to-one on the two connecting ears 124, serving as the actual lifting point, allowing the lifting equipment (such as a crane or lifting device) to be connected through a sling or other means.

[0069] As shown in Figure 6 In some embodiments of the spent fuel handling device 1, the spent fuel handling device 20 further includes a remote observation device 4, which includes an observation screen 41 provided with a cross alignment mark 42, and the observation screen 41 is electrically connected to the alignment camera 32, and the center of the cross alignment mark 42 coincides with the center of the observation screen 41.

[0070] Understandably, the observation screen 41, as the core display device for remote observation, is used to present the images captured by the alignment camera 32 in real time. It provides operators with clear and intuitive visual feedback, helping them to precisely control the position of the extraction mechanism. A crosshair alignment mark 42 is set on the observation screen 41, with its center coinciding with the center of the observation screen 41. This mark serves as a reference point, facilitating operators to determine the specific position and orientation of the detector 20, ensuring that the connecting chain 33 can be accurately aligned.

[0071] It should be noted that during the adjustment process, the staff can align the center of the cross alignment mark 42 with the detector to be removed, thereby ensuring that the mechanism can accurately align the detector and successfully remove it.

[0072] like Figure 7 As shown, in some embodiments of the high-level radioactive detector extraction mechanism 10, the high-level radioactive detector extraction mechanism 10 further includes a detector end connection device 5. The detector end connection device 5 includes a sleeve 51, a retaining member 52, and a retaining locking bolt 53. The retaining member 52 is rotatably mounted on the sleeve 51, and the retaining locking bolt 53 passes through and is screwed to the retaining member 52, and the retaining locking bolt 53 is movably supported against the sleeve 51. A lifting part 511 is provided on the sleeve 51.

[0073] Understandably, the enclosure 52 and the sleeve 51 together enclose a cylindrical space with an open end, which can accommodate the end of the detector. Furthermore, when the enclosure locking bolt 53 extends and abuts against the sleeve 51, the relative position of the enclosure 52 and the sleeve 51 is fixed, allowing the enclosure 52 and the sleeve 51 to clamp and fix the end of the detector from opposite sides. The lifting part 511 is detachably connected to the connecting chain 33. Thus, the lifting device 2 can move the detector end connecting device 5 via the connecting chain 33, thereby pulling out the detector.

[0074] The implementation of this invention has the following beneficial effects:

[0075] This invention relates to a core high-level radioactive detector removal mechanism. By introducing a shielding cylinder, the core high-level radioactive detector removal mechanism provides effective radiation protection during the removal of the detector, significantly reducing the radiation dose that operators may receive during operation and improving the safety of the working environment.

[0076] Secondly, the present application is also configured with a positioning connection device with a positioning camera, which can monitor and adjust the position of the lifting moving assembly in real time, ensure accurate alignment and connection with the detector to be removed, and avoid position interference between the shielding cylinder and other structural members in the core during the process of gradually deepening the shielding cylinder into the core pool, thereby solving the problem of difficult accurate docking in the traditional method, improving the detector removal efficiency and operation safety.

[0077] In addition, since the lifting device includes the lifting moving assembly slidingly arranged in the shielding cylinder and the lifting driving assembly located outside the shielding cylinder, the detector removal process can be flexibly controlled without damaging the shielding effect, thereby adapting to the requirements of different positions and angles.

[0078] The scheme of the present application has been described in detail above with reference to the drawings. In the above-described embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method of the embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device of the embodiments of the present application can be combined, divided and reduced according to actual needs.

[0079] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A core high exposure detector withdrawal mechanism, characterized in that, The utility model relates to a shielding device, lifting device and alignment connecting device, and belongs to the field of nuclear power plant. The shielding device comprises a shielding cylinder and a lifting assembly, wherein the shielding cylinder is open at both ends, and the lifting assembly is arranged on the shielding cylinder. The lifting device comprises a lifting moving assembly, a lifting driving assembly and a lifting connecting assembly, wherein the lifting moving assembly is slidingly arranged in the shielding cylinder, the lifting driving assembly is arranged outside the shielding cylinder, the lifting driving assembly is drivingly connected to the lifting connecting assembly, and the lifting connecting assembly is connected to the lifting moving assembly. The alignment connecting device comprises an alignment support, an alignment camera and a plurality of connecting chains, wherein the alignment support is arranged on the lifting moving assembly, the alignment camera is arranged on the central axis of the alignment support, each of the connecting chains is symmetrically arranged on the alignment support, and the connecting chains are detachably connected to the end of the detector. The lifting driving assembly drives the lifting moving assembly to ascend or descend along the shielding cylinder through the lifting connecting assembly, so that the lifting moving assembly drives the detector to be pulled out of the core through the connecting chains. The alignment support comprises a connecting ring, a balance frame and a plurality of balance adjusting members, wherein one end of each of the balance adjusting members is connected to the connecting ring, and the other end of each of the balance adjusting members is connected to the balance frame. The central axis of the connecting ring and the central axis of the balance frame coincide with each other, each of the balance adjusting members is uniformly distributed in a circle around the central axis of the connecting ring, and the alignment camera is arranged in the center of the balance frame. The balance adjusting member comprises a connecting stud and a plurality of adjusting nuts, wherein one end of each of the connecting studs is arranged in the connecting ring, the other end of each of the connecting studs is arranged in the balance frame, and the adjusting nuts are arranged on both ends of each of the connecting studs.

2. The core high detector withdrawal mechanism of claim 1, wherein, When the adjusting nuts are rotated, the distance between the balance frame and the connecting ring can be adjusted correspondingly.

3. The core high detector withdrawal mechanism of claim 2, wherein, The balance adjusting member further comprises an elastic member, wherein the elastic member is sleeved on the connecting stud, one end of each of the elastic members abuts against the connecting ring, and the other end of each of the elastic members abuts against the balance frame.

4. The ex core high activity detector extraction mechanism according to any one of claims 1 to 3, characterized in that, The balance frame comprises a cross member, wherein the alignment camera is located in the center of the cross member, and each of the connecting chains is located at the peripheral position of the cross member.

5. The core high detector withdrawal mechanism of claim 4, wherein, The alignment connecting device comprises two connecting columns, two connecting lifting rings, two connecting shackles and two connecting chains, wherein the two connecting columns are symmetrically arranged at the peripheral edge of the cross member, the two connecting lifting rings are correspondingly arranged on the two connecting columns, the two connecting shackles are correspondingly detachably connected to the two connecting lifting rings, the two connecting chains are correspondingly connected to the two connecting lifting rings, and the two connecting chains are used for connecting the detector.

6. The core high detector withdrawal mechanism of claim 1, wherein, The lifting moving assembly comprises a lifting body, a connecting seat and two guide pulley sets, the lifting body is located in the shielding cylinder, the two guide pulley sets are symmetrically arranged on the lifting body, the two guide pulley sets are slidingly arranged on the inner wall of the shielding cylinder, the lifting connecting assembly is connected to the top of the lifting body, the connecting seat is arranged at the bottom of the lifting body, and the alignment support is connected to the connecting seat.

7. The ex core high activity detector extraction mechanism according to claim 1 or 6, characterized in that, The lifting driving assembly comprises a lifting seat, a lifting motor, a lifting roller, a lifting fixed pulley and a lifting cable, the lifting seat is arranged on the outer side wall of the shielding cylinder, the lifting motor is arranged on the lifting seat, the lifting roller is rotationally arranged on the lifting seat, the lifting motor is drivingly connected to the lifting roller, the lifting fixed pulley is arranged on the lifting assembly, the lifting cable is wound on the lifting roller, and the end of the lifting cable is connected to the lifting moving assembly after being wound around the lifting fixed pulley. The lifting connecting assembly comprises a movable connecting block, two movable arms and two cable fixing wheels, the movable connecting block is rotationally arranged on the lifting moving assembly, the two movable arms are rotationally connected to the movable connecting block, and the two movable arms are symmetrically arranged on the movable connecting block, the two cable fixing wheels are correspondingly arranged on the two movable arms, and the lifting driving assembly is drivingly connected to the two cable fixing wheels.

8. The core high detector withdrawal mechanism of claim 1, wherein, The lifting assembly comprises a lifting seat, a lifting frame and two lifting shafts, the lifting seat is arranged at the end of the shielding cylinder, the lifting frame is arranged on the lifting seat, the lifting frame is provided with two connecting ears, and the two lifting shafts are correspondingly arranged on the two connecting ears.

9. The core high detector withdrawal mechanism of claim 1, wherein, The core high-level waste detector pulling mechanism further comprises a remote observation device, the remote observation device comprises an observation screen, the observation screen is provided with a cross alignment mark, the observation screen is electrically connected to the alignment camera, and the center of the cross alignment mark coincides with the center of the observation screen.

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