Reactor core high-level detector pulling mechanism

Abstract

The invention relates to a reactor core high-level detector pulling mechanism which provides effective radiation protection in the pulling process of a detector by introducing a shielding cylinder, so that the radiation dosage possibly received by an operator during operation is remarkably reduced, and the safety of a working environment is improved. Secondly, an alignment connecting device with an alignment camera is further arranged, the position of the lifting and moving assembly can be monitored and adjusted in real time, it is ensured that the lifting and moving assembly is accurately aligned and connected with the detector to be pulled out, and in the process that the shielding cylinder gradually goes deep into the reactor core water pool, the detection accuracy is improved. And position interference between the shielding cylinder and other structural members in the reactor core can be avoided, so that the problem that accurate butt joint is difficult in a traditional method is solved, and the detector pulling-out efficiency and the operation safety are improved.

Description

Technical Field

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

[0002] During the long-term operation of a nuclear power plant, a variety of detectors are assembled inside the core of the nuclear reactor to monitor various operating parameters of the core. After being exposed to a high-radiation environment for a long time, these detectors will accumulate a large amount of radioactive nuclides by themselves, resulting in their becoming highly radioactive components. When maintenance or replacement of these detectors is required, due to their strong radioactivity, the disassembly and handling processes face great challenges.

[0003] Firstly, due to the very high radioactive level of the detector, it is difficult to maintain completely effective shielding all the time, which brings potential radiation exposure risks to the operator, and the risk of extracting the detector is high. Secondly, the lifting mechanism used to drive the extraction of the detector, when descending to a position where it can be connected to the detector, it is difficult to accurately align with the extraction connection position of the detector, and the space inside the core pool is narrow and filled with various structural components, making it extremely easy for the lifting mechanism to have position interference or collision during the process of approaching the detector. Summary of the Invention

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

[0005] The present invention provides a core high-level radioactive detector extraction mechanism, which includes:

[0006] A shielding device, including a shielding cylinder body and a lifting assembly, both ends of the shielding cylinder body are open, and the lifting assembly is arranged on the shielding cylinder body;

[0007] A lifting device, including a lifting moving assembly, a lifting driving assembly and a lifting connection assembly, the lifting moving assembly is slidably arranged inside the shielding cylinder body, the lifting driving assembly is arranged outside the shielding cylinder body, the lifting driving assembly is drivingly connected to the lifting connection assembly, and the lifting connection assembly is connected to the lifting moving assembly; and

[0008] An alignment connection device, including an alignment bracket, an alignment camera and a plurality of connection chains, the alignment bracket is arranged on the lifting moving assembly, the alignment camera is arranged on the central axis of the alignment bracket, and each of the connection chains is symmetrically arranged on the alignment bracket, and the connection chains are detachably connected to the end of the detector;

[0009] Among them, the lifting drive assembly drives the lifting moving assembly to lift along the shielding cylinder body through the lifting connection assembly, so that the lifting moving assembly drives the detector to be pulled out of the core through the connecting chain.

[0010] Preferably, the alignment bracket includes 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 balance adjusting member is connected to the connecting ring, and the other end of each balance adjusting member is connected to the balance frame;

[0011] The central axis of the connecting ring coincides with the central axis of the balance frame. Each balance adjusting member is evenly distributed in a circle around the central axis of the connecting ring. The alignment camera is disposed through the center of the balance frame.

[0012] Preferably, the balance adjusting member includes a connecting stud and a plurality of adjusting nuts. One end of each connecting stud is disposed through the connecting ring, and the other end of each connecting stud is disposed through the balance frame. Each connecting stud is provided with the adjusting nuts at both ends. When the adjusting nuts rotate, the distance between the balance frame and the connecting ring can be correspondingly adjusted.

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

[0014] Preferably, the balance frame includes a cross member. The alignment camera is located at the center of the cross member. Each connecting chain is located at the peripheral position of the cross member.

[0015] Preferably, the alignment connecting device includes two connecting columns, two connecting lifting rings, two connecting shackles and two connecting chains. The two connecting columns are symmetrically disposed on the periphery of the cross member. The two connecting lifting rings are correspondingly disposed on the two connecting columns. The two connecting shackles are detachably connected to the two connecting lifting rings correspondingly. The two connecting chains are connected to the two connecting lifting rings correspondingly. The two connecting chains are both used to connect the detector.

[0016] Preferably, the lifting moving assembly includes a lifting main body, a connecting seat and two guiding pulley groups. The lifting main body is located inside the shielding cylinder body. The two guiding pulley groups are symmetrically disposed on the lifting main body. The two guiding pulley groups are both slidably disposed on the inner wall of the shielding cylinder body. The lifting connection assembly is connected to the top of the lifting main body. The connecting seat is disposed at the bottom of the lifting main body. The alignment bracket is connected to the connecting seat.

[0017] Preferably, the lifting drive assembly includes a lifting base, a lifting motor, a lifting drum, a lifting fixed pulley, and a lifting cable. The lifting base is disposed on the outer sidewall of the shielding cylinder body. The lifting motor is disposed on the lifting base. The lifting drum is rotatably disposed on the lifting base. The lifting motor is drivingly connected to the lifting drum. The lifting fixed pulley is disposed on the lifting assembly. The lifting cable is wound around the lifting drum, and the end of the lifting cable is connected to the lifting moving assembly after passing around the lifting fixed pulley; and / or

[0018] The lifting connection assembly includes a movable connection block, two movable arms, and two cable fixing pulleys. The movable connection block is rotatably disposed on the lifting moving assembly. The two movable arms are respectively rotatably connected to the movable connection block, and the two movable arms are symmetric with respect to the movable connection block. The two cable fixing pulleys are respectively disposed on the two movable arms, and the lifting drive assembly is drivingly connected to the two cable fixing pulleys.

[0019] Preferably, the lifting assembly includes a lifting base, a lifting frame, and two lifting shafts. The lifting base is disposed at the end of the shielding cylinder body. The lifting frame is disposed on the lifting base. Two connecting ears are disposed on the lifting frame. The two lifting shafts are respectively disposed on the two connecting ears, and both of the two connecting ears are for connecting a lifting device.

[0020] Preferably, the core high-level radioactive detector extraction mechanism further includes a remote observation device. The remote observation device includes an observation screen. A cross alignment mark is disposed on the observation screen. 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.

[0021] Implementing the present invention has the following beneficial effects:

[0022] The present invention relates to a core high-level radioactive detector extraction mechanism. By introducing a shielding cylinder body, the core high-level radioactive detector extraction mechanism provides effective radiation protection during the extraction process of the detector, significantly reducing the radiation dose that the operator may receive during operation and improving the safety of the working environment.

[0023] Secondly, the present invention is also configured with an alignment connection device with an alignment camera, which can monitor and adjust the position of the lifting moving assembly in real time to ensure its accurate alignment and connection with the detector to be extracted. Moreover, during the process of the shielding cylinder body gradually entering the core water pool, it can also avoid position interference between the shielding cylinder body and other structural components in the core, thereby solving the problem of difficult accurate docking in the traditional method and improving the detector extraction efficiency and operation safety.

[0024] In addition, since the lifting device includes a lifting and moving component slidably disposed within the shielding cylinder and a lifting drive component located outside the shielding cylinder, the extraction process of the detector can be flexibly controlled without compromising the shielding effect, meeting the requirements of different positions and angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features, and advantages of the present invention will become more apparent by describing the exemplary embodiments of the present invention in more detail in conjunction with the accompanying drawings, wherein, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

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

[0027] Figure 2 is Figure 1 an exploded view of the core high-level radioactive detector extraction mechanism shown;

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

[0029] Figure 4 is a schematic structural diagram of a position alignment connection device in some embodiments of the present invention;

[0030] Figure 5 is Figure 4 an exploded view of the position alignment connection device shown;

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

[0032] Figure 7 is a schematic structural diagram of a core high-level radioactive detector extraction mechanism and a detector in some embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0034] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such 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, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Figure 1 and Figure 2 The core high-level radioactive detector extraction mechanism 10 in some embodiments of the present invention is shown, which includes a shielding device 1, a lifting device 2 and a docking connection device 3. The lifting device 2 is slidably arranged on the shielding device 1, and the docking connection 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 process of the detector 20. The lifting device 2 is responsible for actually performing the extraction action of the detector 20. The docking connection device 3 can solve the problem of precise docking that is difficult to achieve in traditional methods, and ensure that the lifting and moving component 21 can be successfully connected to the target detector 20.

[0039] As Figures 1 to 5 shown, the shielding device 1 includes a shielding cylinder body 11 and a lifting component 12. Both ends of the shielding cylinder body 11 are open, and the lifting component 12 is arranged on the shielding cylinder body 11;

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

[0041] The alignment connecting device 3 includes an alignment bracket 31, an alignment camera 32 and a plurality of connecting chains 33. The alignment bracket 31 is arranged on the lifting moving component 21. The alignment camera 32 is arranged on the central axis of the alignment bracket 31. The connecting chains 33 are symmetrically arranged on the alignment bracket 31, and the connecting chains 33 are detachably connected to the end of the detector 20. Among them, the lifting driving component 22 drives the lifting moving component 21 to lift along the shielding cylinder body 11 through the lifting connecting component 23, so that the lifting moving component 21 drives the detector 20 to be pulled out of the reactor core through the connecting chains 33.

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

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

[0044] The alignment bracket 31 is installed on the lifting moving component 21 and is used to support and fix the alignment camera 32. The alignment camera 32 is placed at the central position of the alignment bracket 31 to monitor the surrounding environment in real time and feed the image information back to the operator to help accurately locate the position of the detector 20. By adjusting the position of the lifting moving component 21, finally the connecting chains 33 can be accurately connected to the end of the detector 20. A plurality of chains are evenly distributed around the alignment bracket 31, one end is fixed on the bracket, and the other end is designed to be quickly connectable so as to be quickly and stably connected to the detector 20. This design not only ensures the connection strength but also facilitates disassembly and replacement.

[0045] It should be noted that when it is necessary to remove the high - level detector 20 in the core, first use the lifting assembly 12 to lift the shielding device 1 together with the internal lifting device 2 to an appropriate position above the core. Then start the lifting drive assembly 22 to lower the lifting moving assembly 21 until it is close to the detector 20. At this time, the operator fine - tunes the position of the lifting moving assembly 21 according to the picture transmitted back by the alignment camera 32 until the connecting chain 33 can be smoothly docked with the end of the detector 20. After confirming the firm connection, start the lifting drive assembly 22 again and slowly lift the lifting moving assembly 21, thereby driving the detector 20 to rise together to complete the removal operation. Throughout the process, the shielding cylinder 11 always plays an important protective role, protecting the on - site staff from excessive radiation damage.

[0046] It should also be noted that during the process of removing the detector 20, the lifting moving assembly 21 gradually rises along the shielding cylinder to remove the detector 20. At the same time, the shielding cylinder 11 gradually descends, so as to further isolate by means of the liquid in the core pool.

[0047] As Figures 3 to 5 shown, in some embodiments of the high - level detector extraction mechanism 10 of the core, the alignment bracket 31 includes a connecting ring 311, a balance bracket 312 and a number 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 bracket 312;

[0048] The central axis of the connecting ring 311 coincides with the central axis of the balance bracket 312. Each balance adjusting member 313 is evenly distributed in a circle around the central axis of the connecting ring 311. The alignment camera 32 is passed through the center of the balance bracket 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 bracket 312 is used to support the alignment camera 32 and ensure its stability and accuracy. A number of balance adjusting members 313 are distributed between the connecting ring 311 and the balance bracket 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 bracket 312.

[0050] It should be noted that the central axis of the connecting ring 311 coincides exactly with the central axis of the balance frame 312, ensuring the concentricity of the entire alignment bracket 31 during operation and contributing to improving the positioning accuracy. A plurality of balance adjusting members 313 are evenly distributed in a circle around the central axis of the connecting ring 311, which not only enhances the overall rigidity of the structure but also enables the forces in all directions to be evenly distributed, avoiding tilting or offset caused by uneven stress. The alignment camera 32 is precisely installed at the central position of the balance frame 312 and passes through its central hole to ensure that the optical axis of the camera is consistent with the central axes of the connecting ring 311 and the balance frame 312, thereby providing the most accurate visual feedback for the operator and further ensuring the docking accuracy.

[0051] As Figures 3 to 5 shown, in some embodiments of the core high-level radioactive detector extraction mechanism 10, the balance adjusting member 313 includes a connecting stud 3131 and a plurality of adjusting nuts 3132. One end of each connecting stud 3131 is passed through the connecting ring 311, and the other end of each connecting stud 3131 is passed through the balance frame 312. An adjusting nut 3132 is provided at each end of each connecting stud 3131. When the adjusting nut 3132 rotates, the distance between the balance frame 312 and the connecting ring 311 can be correspondingly adjusted.

[0052] It can be understood that the connecting stud 3131 serves as the main connecting and adjusting element, and the connecting stud 3131 runs through between the connecting ring 311 and the balance frame 312. A plurality of adjusting nuts 3132 are all used to finely adjust 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 to form a stable mechanical connection. This passing-through method not only ensures the firmness of the connection but also provides a basis for subsequent adjustment. One or more adjusting nuts are arranged at each end of each connecting stud 3131. By rotating these nuts, the length of the connecting stud 3131 extending out 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 to ensure that the entire alignment bracket 31 is in the best working state.

[0053] Due to the use of threaded connection, a slight position change will occur each time the adjusting nut is rotated, which enables the distance between the balance frame 312 and the connecting ring 311 to be very precisely controlled. This is crucial for achieving the precise positioning of the alignment camera 32, especially in the nuclear facility environment where high-precision operations are required.

[0054] As Figures 3 to 5As shown, in some embodiments of the core high-level radiation detector extraction mechanism 10, the balance adjustment member 313 also includes an elastic member 3133, which is sleeved outside the connecting stud 3131, and 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] It can be understood that the elastic member 3133 is tightly wrapped around the outside of the connecting stud 3131 to ensure that it provides continuous support between the two. One end of each elastic member 3133 directly contacts and supports the connecting ring 311, and the other end rests on the balance frame 312. This arrangement enables the elastic member 3133 to apply a preload between the connecting ring 311 and the balance frame 312, and allows compression or tension deformation within a certain range. The elastic member 3133 provides the necessary preload to ensure close 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 core high-level radiation detector extraction mechanism 10, the balance frame 312 includes a cross member, the alignment camera 32 is located at the center of the cross member, and each connecting chain 33 is located at the periphery of the cross member.

[0057] It can be understood that the cross piece, as the core component of the balance frame 312, not only provides structural support, but also provides installation locations 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 piece to ensure that its optical axis is consistent 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 at the periphery of the cross piece and is connected to the end of the detector 20 through a specific connection mechanism (such as a connecting column 34, a connecting ring 35 and a connecting shackle 36).

[0058] like Figure 4 and Figure 5 As shown, in some embodiments of the core high-level radiation detector extraction mechanism 10, the alignment connection device 3 includes two connection columns 34, two connection rings 35, two connection shackles 36 and two connection chains 33, the two connection columns 34 are symmetrically arranged on the periphery of the cross piece, the two connection rings 35 are arranged on the two connection columns 34 in a one-to-one manner, the two connection shackles are detachably connected to the two connection rings 35 in a one-to-one manner, the two connection chains 33 are connected to the two connection rings 35 in a one-to-one manner, and the two connection chains 33 are both used to connect the detector 20.

[0059] Understandably, the two connecting columns 34 are symmetrically arranged on the periphery of the cross member and are used to support and fix the connecting lifting rings 35. The two connecting lifting rings 35 are respectively installed on the two connecting columns 34 and serve as transition members between the connecting chain 33 and other components. The two connecting shackles 36 are detachably connected to the two connecting lifting rings 35 to facilitate the quick connection or disconnection of the connecting chain 33. One end of each connecting chain 33 is connected to the corresponding connecting lifting ring 35, and the other end is used to connect to the end of the detector 20.

[0060] It should be noted that the two connecting columns 34, the connecting lifting rings 35 and the connecting chain 33 are all symmetrically distributed around the cross member, ensuring the balanced distribution of forces in all directions of the entire system and improving stability. The use of the connecting shackle 36 enables the connecting chain 33 to be quickly and safely connected or separated from the detector 20, meeting the rapid response requirements in actual operation. Since the alignment camera 32 is located at the center of the cross member and the connecting chain 33 is located at the periphery, this layout helps to achieve more accurate alignment and ensures that the connecting chain 33 can be smoothly docked with the detector 20.

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

[0062] Understandably, the lifting main body 211 is located inside the shielding cylinder 11. The lifting main 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 main 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.). There are two guiding pulley groups 213 and they can slide on the inner wall of the shielding cylinder 11. Each guiding pulley group 213 includes multiple pulleys to reduce friction and ensure that the lifting main body 211 can smoothly move up and down along the shielding cylinder 11.

[0063] As Figure 1 and Figure 2As shown, in some embodiments of the core high-level radioactive detector extraction mechanism 10, the lifting drive assembly 22 includes a lifting seat 221, a lifting motor 222, a lifting drum 223, a lifting fixed pulley 224, and a lifting cable 225. The lifting seat 221 is disposed on the outer sidewall 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 drivingly connected to the lifting drum 223. The lifting fixed 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 connected to the lifting moving assembly 21 after passing around the lifting fixed pulley 224.

[0064] It can be understood that the lifting seat 221 is installed on the outer sidewall of the shielding cylinder 11, providing a stable basic support for the entire lifting drive assembly 22. The lifting motor 222 is fixed on the lifting seat 221 and, as a power source, is responsible for driving the rotation of the lifting drum 223, thereby realizing the lifting control of the lifting moving assembly 21. The lifting drum 223 is rotatably disposed 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 disposed 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 around the lifting drum 223, and the other end of the lifting cable 225 is connected to the lifting moving assembly 21 after passing around 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 action of the lifting moving assembly 21.

[0065] As Figure 3 As shown, in some embodiments of the core high-level radioactive detector extraction mechanism 10, the lifting connection assembly 23 includes a movable connection block 231, two movable arms 232, and two cable fixing pulleys 233. The movable connection block 231 is rotatably disposed on the lifting moving assembly 21. The two movable arms 232 are respectively rotatably connected to the movable connection block 231, and the two movable arms 232 are symmetric with respect to the movable connection block 231. The two cable fixing pulleys 233 are correspondingly disposed on the two movable arms 232, and the lifting drive assembly 22 is drivingly connected to the two cable fixing pulleys 233.

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

[0067] As Figure 1 shown, in some embodiments of the core high-level radioactive detector extraction mechanism 10, the lifting assembly 12 includes a lifting base 121, a lifting frame 122, and two lifting shafts 123. The lifting base 121 is arranged at the end of the shielding cylinder 11. The lifting frame 122 is arranged on the lifting base 121. Two connecting ears 124 are arranged on the lifting frame 122. The two lifting shafts 123 are respectively arranged on the two connecting ears 124, and both of the two connecting ears 124 are for connecting with lifting equipment.

[0068] Understandably, the lifting base 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 frame 122 is used to provide a direct support platform for subsequent lifting operations. The lifting frame 122 is designed with a reasonable structure to disperse the force and ensure the stability during the lifting process. Both of the two connecting ears 124 are used to fix the lifting shafts 123 and provide connection interfaces for connecting with external lifting equipment. The two lifting shafts 123 are respectively installed on the two connecting ears 124 and serve as the actual lifting points, allowing lifting equipment (such as a crane or a lifting device) to be connected thereto through a sling or other means.

[0069] As Figure 6 shown, in some embodiments of the core high-level radioactive detector extraction mechanism 10, the core high-level radioactive detector 20 extraction mechanism further includes a remote observation device 4. The remote observation device 4 includes an observation screen 41. A cross alignment mark 42 is arranged on the observation screen 41. 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 in real time the images captured by the alignment camera 32. It provides clear and intuitive visual feedback to the operator, helping them accurately control the position of the extraction and insertion mechanism. The cross alignment mark 42 is set on the observation screen 41, and its center coincides with the center of the observation screen 41. This mark is used as a reference point to facilitate the operator to judge the specific position and direction of the detector 20, ensuring that the connecting chain 33 can be accurately docked.

[0071] It should be noted that during the adjustment process, the operator can align the center of the cross alignment mark 42 with the detector to be disassembled, so as to ensure that this mechanism can accurately align with the detector and successfully complete the extraction of the detector.

[0072] As Figure 7 shown, in some embodiments of the core high-level radioactive detector extraction and insertion mechanism 10, the core high-level radioactive detector extraction and insertion mechanism 10 further includes a detector end connection device 5. The detector end connection device 5 includes a sleeve 51, an enclosing member 52 and an enclosing locking bolt 53. The enclosing member 52 is rotatably arranged on the sleeve 51. The enclosing locking bolt 53 passes through and is screwed to the enclosing member 52, and the enclosing locking bolt 53 is movably abutted against the sleeve 51. Among them, a lifting part 511 is arranged on the sleeve 51.

[0073] Understandably, the enclosing member 52 and the sleeve 51 can jointly enclose an end-open cylindrical space, and this cylindrical space can accommodate the end of the detector. Further, when the enclosing locking bolt 53 extends and abuts against the sleeve 51, the relative positions of the enclosing member 52 and the sleeve 51 are fixed, so that the enclosing member 52 and the sleeve 51 can respectively clamp and fix the end of the detector from opposite sides. The lifting part 511 is used for detachable connection with the connecting chain 33. Thus, the lifting device 2 can drive the detector end connection device 5 to move through the connecting chain 33, and then extract the detector.

[0074] Implementing the present invention has the following beneficial effects:

[0075] The present invention relates to a core high-level radioactive detector extraction and insertion mechanism. By introducing a shielding cylinder body, this core high-level radioactive detector extraction and insertion mechanism provides effective radiation protection during the extraction process of the detector, significantly reducing the radiation dose that the operator may receive during operation and improving the safety of the working environment.

[0076] Secondly, the present invention is also configured with an alignment connection device with an alignment camera, which can monitor and adjust the position of the lifting and moving component in real time to ensure its precise alignment and connection with the detector to be removed. Moreover, during the process of gradually inserting the shielding cylinder into the core pool, it can also prevent the shielding cylinder from interfering with the positions of other structural components in the core, thus solving the problem of difficult accurate docking in the traditional method and improving the detector removal efficiency and operation safety.

[0077] In addition, since the lifting device includes a lifting and moving component slidably disposed inside the shielding cylinder and a lifting drive component located outside the shielding cylinder, it can flexibly control the removal process of the detector without damaging the shielding effect and meet the requirements of different positions and angles.

[0078] The solution of the present invention has been described in detail with reference to the accompanying drawings above. In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present invention. In addition, it can be understood that the steps in the method embodiments of the present invention can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present invention can be combined, divided, and deleted according to actual needs.

[0079] The various embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field 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 of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A core high-level radiation detector extraction mechanism, characterized in that: include: The shielding device comprises a shielding cylinder and a lifting assembly, wherein both ends of the shielding cylinder are open and the lifting assembly is arranged on the shielding cylinder; The lifting device comprises a lifting moving component, a lifting driving component and a lifting connecting component, wherein the lifting moving component is slidably arranged in the shielding cylinder, the lifting driving component is arranged outside the shielding cylinder, the lifting driving component is drivingly connected to the lifting connecting component, and the lifting connecting component is connected to the lifting moving component; and An alignment connection device, comprising an alignment bracket, an alignment camera and a plurality of connection chains, wherein the alignment bracket is arranged on the lifting and moving assembly, the alignment camera is arranged on the central axis of the alignment bracket, each of the connection chains is symmetrically arranged on the alignment bracket, and the connection chain is detachably connected to the end of the detector; The lifting drive assembly drives the lifting movement assembly to rise and fall along the shielding cylinder through the lifting connection assembly, so that the lifting movement assembly drives the detector to be pulled out of the core through the connection chain.

2. The core high-level radiation detector extraction mechanism according to claim 1, characterized in that: The alignment bracket includes a connecting ring, a balancing frame and a plurality of balancing adjustment members, wherein the connecting ring is connected to the lifting and moving assembly, one end of each balancing adjustment member is connected to the connecting ring, and the other end of each balancing adjustment member is connected to the balancing frame; The central axis of the connecting ring coincides with the central axis of the balancing frame, the balancing adjustment members are evenly distributed around the central axis of the connecting ring, and the alignment camera is disposed at the center of the balancing frame.

3. The core high-level radiation detector extraction mechanism according to claim 2, characterized in that: The balance adjustment member includes a connecting stud and a plurality of adjusting nuts. One end of each connecting stud is passed through the connecting ring, and the other end of each connecting stud is passed through the balancing frame. An adjusting nut is provided at both ends of each connecting stud. When the adjusting nut is rotated, the distance between the balancing frame and the connecting ring can be adjusted accordingly.

4. The core high-level radiation detector extraction mechanism according to claim 3, characterized in that: The balance adjustment member also includes an elastic member, which 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.

5. The core high-level radiation detector extraction mechanism according to any one of claims 2 to 4, characterized in that: The balancing frame comprises a cross piece, the alignment camera is located at the center of the cross piece, and each of the connecting chains is located at the periphery of the cross piece.

6. The core high-level radiation detector extraction mechanism according to claim 5, characterized in that: The alignment connection device includes two connecting columns, two connecting rings, two connecting buckles and two connecting chains. The two connecting columns are symmetrically arranged on the periphery of the cross piece. The two connecting rings are arranged on the two connecting columns one by one. The two connecting buckles are detachably connected to the two connecting rings one by one. The two connecting chains are connected to the two connecting rings one by one. Both connecting chains are used to connect the detectors.

7. The core high-level radiation detector extraction mechanism according to claim 1, characterized in that: The lifting and moving assembly includes a lifting body, a connecting seat and two guide pulley groups. The lifting body is located in the shielding cylinder. The two guide pulley groups are symmetrically arranged on the lifting body. The two guide pulley groups are both slidably arranged on the inner wall of the shielding cylinder. The lifting connection 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 bracket is connected to the connecting seat.

8. The core high-level radiation detector extraction mechanism according to claim 1 or 7, characterized in that: The lifting drive assembly includes a lifting seat, a lifting motor, a lifting drum, a lifting fixed pulley and a lifting cable, wherein 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 drum is rotatably arranged on the lifting seat, the lifting motor is drivingly connected to the lifting drum, the lifting fixed pulley is arranged on the lifting assembly, the lifting cable is wound on the lifting drum, and the end of the lifting cable is connected to the lifting moving assembly after winding around the lifting fixed pulley; and / or The lifting connection assembly includes a movable connection block, two movable arms and two cable fixing wheels. The movable connection block is rotatably arranged on the lifting moving assembly. The two movable arms are respectively rotatably connected to the movable connection block, and the two movable arms are symmetrical to each other on the movable connection block. The two cable fixing wheels are arranged on the two movable arms in a one-to-one manner, and the lifting drive assembly is drivingly connected to the two cable fixing wheels.

9. The core high-level radiation detector extraction mechanism according to claim 1, characterized in that: The lifting assembly includes a lifting seat, a hanger and two lifting shafts. The lifting seat is arranged at the end of the shielding cylinder, the hanger is arranged on the lifting seat, and two connecting ears are arranged on the hanger. The two lifting shafts are arranged on the two connecting ears in a one-to-one manner, and the two connecting ears are both used for connecting lifting equipment.

10. The core high-level radiation detector extraction mechanism according to claim 1, characterized in that: The core high-level radiation detector extraction mechanism also includes a remote observation device, which includes an observation screen 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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