Reactor moving assembly taking-out device

Abstract

The utility model discloses a reactor moving assembly taking-out device, which relates to the field of reactor devices, and comprises a base mechanism, which comprises a support table and support legs which are connected with each other, the support legs are used for supporting the support table, and the support table is provided with an opening; one end of the containing cylinder mechanism is open, the containing cylinder mechanism is of a hollow structure, and the containing cylinder mechanism covers the supporting table and covers the open hole; the clamping mechanism is mounted below the supporting table; the lifting mechanism is installed on the containing cylinder mechanism and connected with the clamping mechanism, and the lifting mechanism is used for driving the clamping mechanism to move in the vertical direction; the clamping mechanism can penetrate through the open hole to move on the upper side and the lower side of the supporting table. The lifting mechanism is arranged to drive the moving assembly to move in the vertical direction, and the limiting clamping mechanism is arranged to drive the moving assembly to move in the vertical direction, so that the purposes of reducing the working intensity of operators, improving the working efficiency and reducing damage to the moving assembly and the sealing face of the pressure-resistant shell are achieved.

Description

Technical Field

[0001] This utility model relates to the field of reactor devices, and specifically to a reactor mobile component removal device. Background Technology

[0002] During VVER reactor maintenance, it is necessary to remove the moving components and perform inspections and measure relevant dimensions. Due to the high temperature and high pressure operation of some moving components, the sealing gaskets between the moving components and the pressure vessel have expanded, causing them to stick and rub against the sealing surface, making disassembly difficult.

[0003] like Figure 1 As shown, the structure includes a movable component a, fastening bolts b, hexagonal nuts c, thrust ring d, sealing gasket e, and pressure-resistant housing f. The existing disassembly method involves using a cantilever crane for lifting, and manually vibrating with a copper rod to slowly pull the movable component out of the pressure-resistant housing before placing it back into the storage rack. This method is laborious and time-consuming, requiring one hour to disassemble one movable component. Furthermore, the movable component is prone to tilting during disassembly, easily damaging the sealing surfaces of the movable component and the pressure-resistant housing. It also has low work efficiency, and personnel are exposed to a high-dose environment for extended periods, resulting in significant dose exposure. Disassembling a movable component requires one crane operator and two mechanical personnel working together, and each disassembly requires an additional 200 uSv of collective dose for the personnel. This disassembly method results in high labor intensity and low disassembly efficiency.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a reactor mobile component removal device. This removal device uses a lifting mechanism and a limiting clamping mechanism to drive the mobile component to move vertically, thereby solving the problem in the prior art that the mobile component is prone to deflection during the removal process, which can easily damage the mobile component and the sealing surface of the pressure vessel.

[0006] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a reactor mobile component removal device, including:

[0007] The base mechanism includes an interconnected support platform and support legs. The support legs are used to support the support platform, and the support platform is provided with openings.

[0008] The receiving cylinder mechanism is open at one end and has a hollow structure. The receiving cylinder mechanism covers the support platform and closes the opening.

[0009] A clamping mechanism, installed below the support platform, is used to clamp the moving component;

[0010] The lifting mechanism is mounted on the receiving cylinder mechanism and connected to the clamping mechanism. The lifting mechanism is used to drive the clamping mechanism to move in the vertical direction.

[0011] The clamping mechanism can move through the opening to the upper and lower sides of the support platform, and when the clamping mechanism is above the support platform, the clamping mechanism is inside the receiving cylinder mechanism.

[0012] Preferably, the clamping mechanism includes an inner sleeve and an outer sleeve, the outer sleeve is sleeved on the outside of the inner sleeve, the bottom of the inner sleeve is provided with a claw mechanism, the outer sleeve can slide axially on the outside of the inner sleeve, and the outer sleeve is used to control the opening and closing of the claw mechanism by sliding.

[0013] Preferably, the inner sleeve has multiple claw mounting slots arranged axially in parallel, each claw mounting slot is provided with a claw component, each claw component has a hook at the bottom, and the claw component can rotate within the claw mounting slot;

[0014] When the outer sleeve moves to one end of the inner sleeve, the distance between the hooks of the individual claw components increases;

[0015] As the outer sleeve moves to the other end of the inner sleeve, the hook distance between the individual claw components decreases.

[0016] Preferably, the claw component is provided with claw pin holes, and each side wall of a single claw mounting groove is provided with slot pin holes. A positioning pin passes through the claw pin hole, and the two ends of the positioning pin are respectively connected to the slot pin holes.

[0017] The claw component includes an upper wedge-shaped portion and a lower vertical portion. The wedge-shaped portion is inclined to the outside of the claw mounting groove. When the claw component is in a free state, the wedge-shaped portion protrudes from the claw mounting groove.

[0018] The chuck pin hole is located on the wedge-shaped part, and the hook head is located at the bottom end of the vertical part;

[0019] When the outer sleeve moves to the wedge-shaped part, the outer sleeve can drive the claw component to rotate outward of the claw mounting groove.

[0020] Preferably, the clamping mechanism further includes several adjusting components disposed on the outer sleeve. The adjusting components include a vertical rod and a horizontal rod, one end of the vertical rod being connected to the outer sleeve and the other end being connected to the horizontal rod.

[0021] The drive bar can cause the outer sleeve to rotate around the inner sleeve;

[0022] The receiving cylinder mechanism is provided with several L-grooves for engaging the adjusting components. Each adjusting component is placed in a single L-groove, and the crossbar can move along the L-grooves. After passing through the L-grooves, the crossbar protrudes outside the receiving cylinder mechanism.

[0023] The L-groove includes a vertical groove and a horizontal groove, with one end of the horizontal groove connected to the top of the vertical groove;

[0024] When the outer sleeve moves to the bottom of the inner sleeve, the bottom of the vertical groove supports the crossbar, and at this time the claw mechanism is in a clamping state on the moving component.

[0025] When the outer sleeve moves to the top of the inner sleeve, the transverse groove supports the crossbar, at which point the chuck mechanism is in a released state from the moving component.

[0026] Preferably, the receiving cylinder mechanism is provided with a receiving through hole, the lifting mechanism includes a screw that passes through the receiving through hole, the screw is connected to the clamping mechanism, and the lifting mechanism also includes a nut, which is sleeved on the screw and located at the top of the receiving cylinder mechanism;

[0027] The nut is designed to rotate and drive the screw to move the clamping mechanism in the vertical direction.

[0028] Preferably, the bottom of the screw is provided with a detachable nut, the clamping mechanism is provided with a clamping through hole, the screw passes through the clamping through hole, and the nut is used to fix the screw to the clamping mechanism.

[0029] Preferably, the support foot is an arc-shaped support structure.

[0030] Preferably, there are two adjusting components, which are symmetrically arranged relative to the outer sleeve;

[0031] There are two L-grooves, which are located on both sides of the receiving cylinder mechanism.

[0032] Preferably, two handle components are symmetrically arranged on the outer side of the receiving cylinder mechanism.

[0033] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects:

[0034] 1. This utility model provides a reactor mobile assembly removal device, which includes a base mechanism for support and an opening on the support platform to allow a clamping mechanism to pass through. The clamping mechanism can clamp the lifting slot of the mobile assembly, and then, under the action of a lifting mechanism, it is driven to move upward, from the lower end of the support platform to the receiving cylinder mechanism at the upper end of the support platform. During the downward movement of the clamping mechanism, the mobile assembly and the pressure vessel are separated, and the mobile assembly is moved upward until the mobile assembly and the pressure vessel are completely separated. This structure allows for smooth separation under the action of the base mechanism, and the limiting action of the lifting mechanism and the receiving cylinder mechanism restricts the clamping mechanism to move only in the vertical direction, avoiding the problem in the prior art where the mobile assembly is deflected during the process, causing damage to the sealing surface of the mobile assembly and the pressure vessel.

[0035] 2. The clamping mechanism provided in this embodiment of the utility model includes an inner sleeve and an outer sleeve. The bottom of the inner sleeve is connected to a claw mechanism, which is used to clamp the lifting slot of the moving component. Since the outer sleeve is provided, the operator can adjust the clamping state and the unclamping state of the claw mechanism on the moving component by adjusting the vertical movement position of the outer sleeve in the inner sleeve. The structure is simple and highly operable.

[0036] 3. The outer sleeve provided in this embodiment of the utility model is provided with an adjustment component, and the receiving sleeve mechanism is provided with an L-groove. Through the cooperation of the adjustment component and the L-groove, not only can the operator conveniently adjust the position of the outer sleeve in the vertical direction of the inner sleeve, but the groove wall of the L-groove can also support the adjustment component, thereby limiting the position of the outer sleeve to achieve a stable clamping state and a stable release state of the claw mechanism.

[0037] 4. The lifting mechanism of this utility model embodiment is achieved through the cooperation of a screw and a nut. The operator only needs to rotate the nut to drive the screw to move in the vertical direction, thereby driving the clamping mechanism and the moving component to move upward.

[0038] In general, the reactor mobile component removal device provided by the embodiments of this utility model drives the mobile component to move vertically by setting up a lifting mechanism and a limiting clamping mechanism, so as to reduce the workload of operators, improve work efficiency, and reduce damage to the mobile component and the sealing surface of the pressure vessel. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a diagram showing the positional relationship between the moving parts and the pressure-resistant housing in the usage scenario;

[0041] Figure 2 A structural diagram of the reactor moving component removal device provided in an embodiment of this utility model;

[0042] Figure 3 This is a structural diagram of the base mechanism provided in an embodiment of the present utility model, wherein... Figure 3 a is a cross-sectional view. Figure 3 b is the top view;

[0043] Figure 4 A connection structure diagram of the base mechanism and the receiving cylinder mechanism provided in an embodiment of this utility model;

[0044] Figure 5 This is a schematic diagram of the clamping mechanism provided in an embodiment of the present utility model;

[0045] Figure 6 This is a schematic diagram of the cross-sectional structure of the reactor moving component removal device provided in an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the inner sleeve structure provided in an embodiment of the present utility model;

[0047] Figure 8 A schematic diagram of the outer sleeve structure provided in an embodiment of this utility model;

[0048] Figure 9 This is a schematic diagram of the claw component structure provided in an embodiment of the present utility model;

[0049] Figure 10 A schematic diagram of the lifting mechanism provided in an embodiment of this utility model.

[0050] The attached diagram shows the markings and corresponding component names:

[0051] a-Moving component, b-Fasting bolt, c-Hex nut, d-Thrust ring, e-Sealing washer, f-Pressure housing;

[0052] 1-Support platform, 2-Support foot, 3-Opening, 4-Receiving cylinder mechanism, 5-Inner sleeve, 6-Outer sleeve, 7-Claw mounting groove, 8-Claw component, 9-Hook head, 10-Claw pin hole, 11-Slot pin hole, 12-Wedge-shaped part, 13-Vertical part, 14-Adjusting component, 15-Horizontal bar, 16-Vertical bar, 17-L-groove, 18-Vertical groove, 19-Horizontal groove, 20-Receiving through hole, 21-Screw, 22-Nut, 23-Nut, 24-Clamping through hole, 25-Handle component. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0057] Example

[0058] like Figure 2 and Figure 3 As shown, this utility model embodiment provides a reactor mobile component removal device, which is used to safely and efficiently remove and replace mobile components inside the reactor during nuclear power plant maintenance, including:

[0059] The base mechanism includes a support platform 1 and support legs 2 connected to each other. The support legs 2 support the support platform 1 and ensure that the support platform 1 remains stable under different ground conditions. For example, in this embodiment of the invention, the base mechanism can be placed on the upper plate of the upper component to form a load-bearing structure for the entire device. The support platform 1 is provided with an opening 3 to accommodate a hollow cylindrical mechanism 4, which is open at one end and is used to surround and protect the moving component during removal. Figure 4 As shown, the receiving cylinder mechanism 4 covers the support platform 1 and closes the opening 3, meaning the opening 3 communicates with the cavity of the receiving cylinder mechanism 4, allowing the clamping mechanism to move from the lower end of the support platform 1 into the interior of the receiving cylinder mechanism 4. The clamping mechanism, installed below the support platform 1, is used to clamp the moving component, securely fixing it for safe lifting and movement. The lifting mechanism, installed on the receiving cylinder mechanism 4 and connected to the clamping mechanism, drives the clamping mechanism to move vertically, thereby removing the moving component from the reactor. The clamping mechanism can move through the opening 3 to the upper and lower sides of the support platform 1, and when the clamping mechanism is above the support platform 1, it is inside the receiving cylinder mechanism 4, achieving complete separation of the moving component and the pressure vessel.

[0060] This embodiment of the invention takes into account the special requirements of nuclear power plant maintenance operations, including radiation protection, operational precision and reliability. Mechanized operation reduces the risk of direct human contact with radioactive components, improves operational efficiency, and also reduces the radiation dose received by workers. Importantly, this embodiment allows for smooth separation under the action of the base mechanism. Simultaneously, the lifting mechanism and the housing mechanism 4 limit the clamping mechanism to move only in the vertical direction, avoiding the problem in existing technologies where the moving component deviates during the process, causing damage to the moving component and the pressure vessel sealing surface.

[0061] To further improve the flexibility of using this device, such as Figure 5 As shown, the clamping mechanism can be configured to include an inner sleeve 5 and an outer sleeve 6. The outer sleeve 6 is fitted outside the inner sleeve 5, and a claw mechanism is provided at the bottom of the inner sleeve 5. The outer sleeve 6 can slide axially outside the inner sleeve 5, and the outer sleeve 6 is used to control the opening and closing of the claw mechanism by sliding. Specifically, in the maintenance of nuclear power plants, the reliability of the clamping mechanism is very important. Through the close cooperation between the claw mechanism of the clamping mechanism and the moving component, safe operation can be carried out in high temperature and high pressure environments, reducing damage to equipment and radiation exposure to personnel. By configuring the outer sleeve 6 to slide axially outside the inner sleeve 5, thereby controlling the opening and closing of the claw mechanism by sliding, this structure can effectively achieve the clamping and release of the moving component, ensuring the stability of the component during removal and placement.

[0062] For example, such as Figure 7 As shown, the inner sleeve 5 has multiple axially parallel claw mounting slots 7, each claw mounting slot 7 containing a claw component 8, and each claw component 8 having a hook 9 at its bottom. The claw component 8 can rotate within the claw mounting slot 7. When the outer sleeve 6 moves to one end of the inner sleeve 5, the distance between the hooks 9 of individual claw components 8 increases; when the outer sleeve 6 moves to the other end of the inner sleeve 5, the distance between the hooks 9 of individual claw components 8 decreases. More specifically, as... Figure 9 As shown, the claw component 8 is provided with a claw pin hole 10, and each side wall of a single claw mounting groove 7 is provided with a slot pin hole 11. A positioning pin passes through the claw pin hole 10, and the two ends of the positioning pin are respectively connected to the slot pin hole 11. The claw component 8 includes an upper wedge-shaped part 12 and a lower vertical part 13. The wedge-shaped part 12 is inclined to the outside of the claw mounting groove 7. When the claw component 8 is in a free state, the wedge-shaped part 12 is exposed outside the claw mounting groove 7. The claw pin hole 10 is provided on the wedge-shaped part 12, and the hook head 9 is provided at the bottom end of the vertical part 13. When the outer sleeve 6 moves to the position of the wedge-shaped part 12, the outer sleeve 6 can drive the claw component 8 to rotate to the outside of the claw mounting groove 7.

[0063] In the above-mentioned inner sleeve 5 structure, multiple claw mounting slots 7 are axially parallel to each other on the inner sleeve 5. These mounting slots are used to accommodate claw components 8 and allow the claw components 8 to rotate inside them. Each claw mounting slot 7 is equipped with a claw component 8. The bottom of each claw component 8 is provided with a hook 9. The hook 9 is the contact point with the moving component and is used to clamp or release the component. The claw component 8 consists of two parts: a square wedge-shaped portion 12 and a lower vertical portion 13. The wedge-shaped portion 12 is inclined outward, so that in the free state, a portion of the wedge-shaped portion 12 is exposed outside the claw mounting groove 7. A positioning pin passes through the claw pin hole 10 on the claw component 8, and both ends of the positioning pin are connected to the slot pin holes 11 on the side walls of the claw mounting groove 7, ensuring that the claw component 8 can rotate within the claw mounting groove 7 but will not move axially. When the outer sleeve 6 moves to the position of the wedge-shaped portion 12, it can drive the claw component 8 to rotate outward from the claw mounting groove 7, causing the position of the hook head 9 to change, thereby releasing the moving component. In this embodiment of the invention, the movement of the outer sleeve 6 controls the opening and closing action of the claw component 8. By precisely controlling the position of the outer sleeve 6, the clamping state of the claw component 8 can be precisely controlled. When it is necessary to clamp the moving component, the outer sleeve 6 moves to the position of the vertical portion 13, pushing the claw component 8 to rotate, causing the hook head 9 to close and clamp the moving component. This structure enables precise control of the jaw component 8 through the simple movement of the outer sleeve 6, making operation convenient. The wedge-shaped part 12 makes the jaw component 8 easy to observe and position in its free state, facilitating maintenance and inspection. The structure of the positioning pin and the slotted pin hole 11 ensures the stability of the jaw component 8 during operation, preventing accidental sliding or displacement. This structure ensures reliable operation even in complex working environments, such as high temperature, high pressure, or radioactive environments.

[0064] It should be noted that the number of claw mounting slots 7 and claw components 8 is not limited here. Preferably, the present invention has three claw components 8, with the claw mounting slots 7 and claw components 8 corresponding one-to-one. In other embodiments, four, five, etc., claw components 8 can also be provided, which is not limited here.

[0065] To better control the opening and closing stability of the claw component 8, further, such as Figure 6 and Figure 8As shown, the clamping mechanism also includes several adjusting components 14 disposed on the outer sleeve 6. Each adjusting component 14 includes a vertical rod 16 and a horizontal rod 15. One end of the vertical rod 16 is connected to the outer sleeve 6, and the other end is connected to the horizontal rod 15. Driving the horizontal rod 15 can cause the outer sleeve 6 to rotate around the inner sleeve 5. The receiving sleeve mechanism 4 is provided with several L-grooves 17 for engaging the adjusting components 14. A single adjusting component 14 is placed in a single L-groove 17, and the horizontal rod 15 can move along the L-groove 17. The L-groove 17 extends outwards onto the outside of the receiving cylinder mechanism 4. The L-groove 17 includes a vertical groove 18 and a horizontal groove 19, with one end of the horizontal groove 19 connected to the top of the vertical groove 18. When the outer sleeve 6 moves to the bottom of the inner sleeve 5, the bottom of the vertical groove 18 supports the horizontal bar 15, at which point the claw mechanism clamps the moving component. When the outer sleeve 6 moves to the top of the inner sleeve 5, the horizontal groove 19 supports the horizontal bar 15, at which point the claw mechanism releases the moving component. It should be noted that the number of adjusting components 14 is not limited here and can be set according to actual needs. As a preferred embodiment of this utility model, two adjusting components 14 are provided, symmetrically arranged relative to the outer sleeve 6. Two L-grooves 17 are provided, respectively arranged on both sides of the receiving cylinder mechanism 4. The arrangement of the two adjusting components 14 and the L-grooves 17 allows the outer sleeve 6 to apply force evenly on the inner sleeve 5, improving the clamping force and reliability of the clamping mechanism.

[0066] Specifically, in this embodiment of the present invention, the adjusting component 14 is installed on the outer sleeve 6, and its crossbar 15 can pass through the L-groove 17 and protrude outwards. The operator can operate the protruding crossbar 15 to make it drive the outer sleeve 6 to move vertically along the vertical groove 18. At the same time, when the crossbar 15 moves to the top of the vertical groove 18, the operator can also apply a lateral force to the crossbar 15 to make the adjusting component 14 drive the outer sleeve 6 to rotate. During the rotation, the crossbar 15 will enter the transverse groove 19. At this time, the transverse groove 19 can support the adjusting component 14, that is, support the outer sleeve 6. This state is the state in which the pawl component 8 releases its engagement with the moving component. When clamping is required, the operator can apply lateral force to the crossbar 15, moving it to the top of the vertical groove 18 and aligning it with the groove. This allows the outer sleeve 6 and adjusting component 14 to slide downwards under gravity and / or the operator's force until the crossbar 15 contacts the bottom of the vertical groove 18. This sliding process is the opening and closing of the chuck component 8. The bottom of the vertical groove 18 supports the crossbar 15 and the outer sleeve 6; this state represents the engagement of the chuck component 8 with the moving component. As the inner sleeve 5 moves the moving component upwards, the outer sleeve 6 and adjusting component 14 also move upwards synchronously, reaching a maximum distance equal to the height of the vertical groove 18. At this point, the crossbar 15 is at the top of the vertical groove 18, and the inner sleeve 5 and outer sleeve 6 enter the receiving cylinder mechanism 4, completely separating the moving component from the pressure-resistant shell.

[0067] As a preferred embodiment of this utility model, such as Figure 10As shown, the receiving cylinder mechanism 4 is provided with a receiving through hole 20. The lifting mechanism includes a screw 21 that passes through the receiving through hole 20. The screw 21 is connected to the clamping mechanism. The lifting mechanism also includes a nut 22, which is sleeved on the screw 21 and located at the top of the receiving cylinder mechanism 4. The nut 22 is configured to drive the screw 21 to move the clamping mechanism vertically after rotation. Specifically, a detachably connected nut 23 is provided at the bottom of the screw 21. The clamping mechanism is provided with a clamping through hole 24, through which the screw 21 passes. The nut 23 is used to fix the screw 21 to the clamping mechanism. In this embodiment of the utility model, the receiving through hole 20 is used to allow the screw 21 to pass through and connect to the top of the receiving cylinder mechanism 4. The screw 21 is the main component of the lifting mechanism, passes through the receiving through hole 20 and is connected to the clamping mechanism. The screw 21 is a long rod with a helical thread. The nut 22 can move up and down along the thread of the screw 21, but it is fixed to the top of the receiving cylinder mechanism 4. The screw 21 passes through the clamping through hole 24, so that the clamping mechanism can move up and down through the screw 21. When the nut 22 rotates, it drives the screw 21 along the thread of the screw 21, thereby driving the clamping mechanism to move in the vertical direction. This movement can be lifting or lowering, depending on the direction of rotation of the nut 22. The combined use of screw 21, nut 22 and nut 23 provides a simple and effective mechanism to control the vertical movement of the clamping mechanism. It is easy to operate and controllable. The detachable nut 23 design makes the installation and maintenance of the clamping mechanism more convenient, and it can be quickly disassembled and assembled. The thread of screw 21 can provide good friction, ensuring the stability and safety of the clamping mechanism during movement.

[0068] In a preferred embodiment of this utility model, the support foot 2 is an arc-shaped support structure. The arc-shaped support foot 2 not only provides sufficient support strength but also offers more ample operating space for the clamping mechanism and the moving component. More preferably, two handle components 25 are symmetrically arranged on the outer side of the receiving cylinder mechanism 4, and a movable end cap is provided on the top of the receiving cylinder mechanism 4. The handle components 25 are symmetrically arranged on the outer side of the receiving cylinder mechanism 4, allowing operators to easily grasp and move or operate the entire device from both sides. This also facilitates installation and ensures sufficient grip comfort and anti-slip properties during operation. The main function of the end cap is to protect the components inside the receiving cylinder from dust, moisture, or other external factors that could damage them. It also provides a sealing or locking mechanism, allowing it to be opened or closed for easy maintenance, inspection, or replacement of the internal components.

[0069] The extraction device provided in this embodiment of the utility model achieves a quick and reliable connection between the three claws and the lifting slot of the moving component by moving the outer sleeve 6 up and down. A threaded connection is used to provide a reliable connection between the fixing module and the lifting module. The lifting function is achieved by rotating the nut 22 through the threaded pair, so as to smoothly and effortlessly remove the moving component from the pressure vessel. In terms of material selection, radiation-resistant stainless steel can be used to improve the radiation resistance and high temperature resistance characteristics, which can meet the special environmental requirements of nuclear power plants. This extraction device greatly reduces the risk of damage to the moving component and the sealing surface of the pressure vessel, avoids abnormal events that make the reactor moving component removal work difficult, reduces the direct economic losses caused by replacing spare parts, reduces the workload of operators, improves the work efficiency of reactor moving component removal, and also reduces the total collective dose value of reactor moving component removal work.

[0070] For example, in use, the adjusting component 14 on the outer sleeve 6 of the moving component removal device is placed into the top transverse groove 19 of the L-groove 17, at which time the three claw components 8 are in the open state. Then, the moving component removal device is installed into the mounting hole of the moving component on the upper plate of the upper component. The adjusting component 14 of the moving component removal device is placed at the bottom of the L-groove 17, at which time the three claw components 8 are in the closed state, and the hook 9 is connected to the lifting groove of the moving component. If the hook 9 cannot be connected to the lifting groove, it indicates that the inner sleeve 5 is too high relative to the head of the moving component. By reversing the clockwise direction... Rotate the nut 22 to lower the inner sleeve 5 until it is flush with the head of the moving component until the hook 9 is connected to the lifting slot of the moving component. After confirming that the hook 9 is connected to the lifting slot of the moving component, rotate the nut 22 clockwise to raise the screw 21 by 20mm and then stop. At this time, the moving component has been detached from the pressure shell. Place the adjusting part 14 of the moving component removal device into the horizontal groove 19 at the top of the L groove 17. At this time, the three claw parts 8 are in the open state, and the entire removal device is detached from the moving component. Remove the moving component removal device and finally use a cantilever crane to lift it into the storage rack.

[0071] By placing the base mechanism of the movable component removal device in the corresponding hole on the upper plate of the upper component, and placing the adjusting component 14 at the bottom of the L-groove 17, the lower part of the claw component 8 contacts the outer sleeve 6. At this time, the three claw components 8 are in a closed state, and the hook head 9 rotates inward to cooperate with the lifting slot of the movable component head, thus achieving a reliable connection between the entire device and the movable component head. That is, when the movable component is difficult to remove, the removal device can be directly installed on the upper plate of the upper component, which can quickly, smoothly, and effortlessly remove the movable component from the pressure-resistant shell. This device only requires simple up and down movement of the outer sleeve 6 to quickly and reliably connect the three claws with the lifting slot of the movable component.

[0072] In general, this utility model embodiment addresses the shortcomings and deficiencies of the original reactor mobile component removal method. It aims to reduce the workload of operators, improve the efficiency and effectiveness of reactor mobile component removal, ensure the smooth implementation of reactor mobile component removal work, reduce the occurrence of abnormalities during operation, and lower the total collective dose value for workers. This device, installed on the upper component plate, enables the rapid, stable, and labor-saving removal of the mobile component from the pressure vessel.

[0073] The extraction device provided in this embodiment can be applied to the removal of mobile components during VVER unit overhauls. Currently, there are 8 VVER units in operation and 4 under construction in my country. Operating units require overhaul on average every 64 months, with each overhaul involving the removal of 103 mobile components. The use of this device will significantly reduce the workload of personnel, improve the efficiency and effectiveness of reactor mobile component removal, ensure the smooth implementation of the removal work, reduce the occurrence of anomalies during operations, and also reduce the overall collective radiation dose to personnel involved in the work. Therefore, this extraction device has significant economic value and broad social benefits during the overhaul process. Of course, the extraction device provided in this embodiment is not limited to the above application scenario and can also be used in other application scenarios requiring the removal of mobile components.

[0074] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A reactor mobile component removal device, characterized in that, include: The base mechanism includes a support platform (1) and a support foot (2) connected to each other. The support foot (2) is used to support the support platform (1). The support platform (1) is provided with an opening (3). The receiving cylinder mechanism (4) is open at one end and has a hollow structure. The receiving cylinder mechanism (4) covers the support platform (1) and covers the opening (3). A clamping mechanism is installed below the support platform (1) for clamping the moving component; A lifting mechanism is installed on the receiving cylinder mechanism (4) and connected to the clamping mechanism. The lifting mechanism is used to drive the clamping mechanism to move in the vertical direction. The clamping mechanism can move through the opening (3) on the upper and lower sides of the support platform (1), and when the clamping mechanism is above the support platform (1), the clamping mechanism is inside the receiving cylinder mechanism (4).

2. The reactor mobile assembly removal device according to claim 1, characterized in that, The clamping mechanism includes an inner sleeve (5) and an outer sleeve (6). The outer sleeve (6) is sleeved on the outside of the inner sleeve (5). The bottom of the inner sleeve (5) is provided with a claw mechanism. The outer sleeve (6) can slide axially on the outside of the inner sleeve (5). The outer sleeve (6) is used to control the opening and closing of the claw mechanism by sliding.

3. The reactor mobile assembly removal device according to claim 2, characterized in that, The inner sleeve (5) is provided with a plurality of claw mounting grooves (7) arranged axially and parallel to each other. Each claw mounting groove (7) is provided with a claw component (8). Each claw component (8) is provided with a hook (9) at the bottom. The claw component (8) can rotate within the claw mounting groove (7). When the outer sleeve (6) moves to one end of the inner sleeve (5), the distance between the hooks (9) between the individual claw components (8) increases; When the outer sleeve (6) moves to the other end of the inner sleeve (5), the distance between the hooks (9) between the individual claw components (8) decreases.

4. A reactor mobile component removal device according to claim 3, characterized in that, The claw component (8) is provided with a claw pin hole (10), and each of the two side walls of the single claw mounting groove (7) is provided with a slot pin hole (11). A positioning pin passes through the claw pin hole (10), and the two ends of the positioning pin are respectively connected to the slot pin hole (11). The claw component (8) includes an upper wedge-shaped portion (12) and a lower vertical portion (13). The wedge-shaped portion (12) is inclined to the outside of the claw mounting groove (7). When the claw component (8) is in a free state, the wedge-shaped portion (12) protrudes out of the claw mounting groove (7). The claw pin hole (10) is provided on the wedge-shaped part (12), and the hook head (9) is provided at the bottom end of the vertical part (13); When the outer sleeve (6) moves to the position of the wedge (12), the outer sleeve (6) can drive the claw component (8) to rotate outward of the claw mounting groove (7).

5. A reactor mobile assembly removal device according to claim 4, characterized in that, The clamping mechanism also includes a number of adjusting components (14) disposed on the outer sleeve (6). The adjusting components (14) include a vertical rod (16) and a horizontal rod (15). One end of the vertical rod (16) is connected to the outer sleeve (6), and the other end is connected to the horizontal rod (15). Driving the crossbar (15) can cause the outer sleeve (6) to rotate around the inner sleeve (5); The receiving cylinder mechanism (4) is provided with a plurality of L-grooves (17) for engaging the adjusting component (14). A single adjusting component (14) is placed in a single L-groove (17). The crossbar (15) can move along the L-grooves (17), and the crossbar (15) protrudes outside the receiving cylinder mechanism (4) after passing through the L-grooves (17). The L-groove (17) includes a vertical groove (18) and a horizontal groove (19), one end of which is connected to the top of the vertical groove (18); When the outer sleeve (6) moves to the bottom of the inner sleeve (5), the bottom of the vertical groove (18) supports the crossbar (15), and at this time the claw mechanism is in a clamping state on the moving component; When the outer sleeve (6) moves to the top of the inner sleeve (5), the transverse groove (19) supports the crossbar (15), and at this time the claw mechanism is in a state of releasing the moving component.

6. A reactor mobile assembly removal device according to claim 1, characterized in that, The receiving cylinder mechanism (4) is provided with a receiving through hole (20), the lifting mechanism includes a screw (21) that passes through the receiving through hole (20), the screw (21) is connected to the clamping mechanism, the lifting mechanism also includes a nut (22), the nut (22) is sleeved on the screw (21) and is located on the top of the receiving cylinder mechanism (4); The nut (22) is configured to drive the screw (21) to move the clamping mechanism in the vertical direction after rotation.

7. A reactor mobile assembly removal device according to claim 6, characterized in that, The bottom of the screw (21) is provided with a detachable nut (23), and the clamping mechanism is provided with a clamping through hole (24). The screw (21) passes through the clamping through hole (24), and the nut (23) is used to fix the screw (21) to the clamping mechanism.

8. A reactor mobile assembly removal device according to claim 1, characterized in that, The support foot (2) is an arc support structure.

9. A reactor mobile assembly removal device according to claim 1, characterized in that, There are two adjustment components (14), and the two adjustment components (14) are symmetrically arranged relative to the outer sleeve (6); Two L-grooves (17) are provided, and are respectively located on both sides of the receiving cylinder mechanism (4).

10. A reactor mobile assembly removal device according to claim 9, characterized in that, Two handle components (25) are symmetrically arranged on the outer side of the receiving cylinder mechanism (4).

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