Hoisting, loading and unloading device for in-pile sealing ring of integrated reactor

Abstract

The invention discloses a hoisting, loading and unloading device for an in-pile sealing ring of an integrated reactor, and relates to the technical field of equipment loading and unloading. The hoisting piece is used for hoisting the bottom plate into the pressure container; the bottom plate is annular and is used for being pressed above the sealing ring; a plurality of mounting rods are evenly distributed on the inner side of the bottom plate in the circumferential direction, and each mounting rod is provided with a driving assembly and a claw assembly. The hook claw assembly comprises a hook claw capable of extending into the inner side groove of the sealing ring; and the driving assembly is used for driving the claw assembly to move, so that the claw extends into the inner side groove of the sealing ring. The device is mainly used for dismounting, mounting and hoisting the in-reactor sealing ring of the integrated reactor of the pressurized water reactor nuclear power station, and the safe and reliable loading and unloading function is achieved. By using the loading and unloading device to load and unload the in-pile sealing ring, the loading and unloading efficiency and quality of the in-pile sealing ring can be improved, and the labor intensity of field maintenance personnel is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment loading and unloading, and in particular to an integrated reactor in-core sealing ring lifting and unloading device. Background Art

[0002] Currently, there are no similar in-core seal ring installation and removal devices available overseas, and domestic nuclear power plants generally rely on manual installation and removal. In-core seal rings are small and lightweight, and the gap between them and the pressure vessel is extremely small, making positioning and installation difficult.

[0003] Therefore, it is of great significance to develop an efficient and integrated in-core sealing ring loading and unloading device to realize the loading and unloading of the reactor in-core sealing ring, thereby improving the maintenance efficiency and reducing the radiation exposure dose of on-site maintenance personnel to fill the gap at home and abroad. Summary of the Invention

[0004] The present invention aims to address the deficiencies of the prior art and to provide an integrated reactor in-core sealing ring lifting and loading device, which is mainly used for disassembly, installation and lifting of the in-core sealing ring of the integrated reactor of a pressurized water reactor nuclear power plant, thereby realizing safe and reliable loading and unloading functions. By using the loading and unloading device to load and unload the in-core sealing ring, the loading and unloading efficiency and quality of the in-core sealing ring can be improved, and the labor intensity of on-site maintenance personnel can be reduced.

[0005] The present invention is achieved through the following technical solutions: An integrated reactor in-core sealing ring lifting and loading and unloading device, comprising: Lifting parts; The bottom plate, the lifting member is used to lift the bottom plate into the pressure vessel; the bottom plate is annular and is used to press on the sealing ring; A number of mounting rods are evenly distributed circumferentially on the inner side of the base plate, and each mounting rod is provided with a driving assembly and a hook assembly; the hook assembly includes a hook that can extend into the inner groove of the sealing ring; the driving assembly is used to drive the hook assembly to move so that the hook extends into the inner groove of the sealing ring.

[0006] Compared with the existing technology, there are currently no similar in-core sealing ring loading and unloading devices abroad. Domestic nuclear power plants generally use manual loading and unloading. The in-core sealing rings are small in size, light in weight, and have a very small gap with the pressure vessel, making positioning and assembly difficult during loading and unloading. The present invention provides an integrated reactor in-core sealing ring lifting and loading and unloading device, which is mainly used for disassembly, installation and lifting of the in-core sealing rings of the integrated reactor of a pressurized water reactor nuclear power plant, thereby realizing safe and reliable loading and unloading functions. By using the loading and unloading device to load and unload the in-core sealing rings, the loading and unloading efficiency and quality of the in-core sealing rings can be improved, and the labor intensity of on-site maintenance personnel can be reduced. The specific scheme includes: a lifting part and a base plate, the lifting part is used to lift the base plate from the flange surface of the pressure vessel into the pressure vessel and close to the sealing ring; the base plate is annular and adapted to the sealing ring, so that after the base plate is lifted in, the base plate can be pressed on the sealing ring, thereby maintaining the stability of the sealing ring lifting process and reducing the movement of the sealing ring; there is a central support at the center of the base plate, and the central support is circumferentially connected to the inner side of the base plate through a plurality of mounting rods, wherein the mounting rod can be an I-shaped steel plate; the driving assembly and the claw assembly are both arranged on the mounting rod; in specific use, the claw of the claw assembly is driven to move by the driving assembly, so that the claw extends into the inner groove of the inner side of the sealing ring, so that the sealing ring is grabbed due to the extension of the plurality of claws, and the sealing ring can be lifted by lifting the base plate to complete the removal of the sealing ring.

[0007] The above solution aims to achieve the following: using the loading and unloading device can reduce the labor intensity of on-site maintenance personnel and significantly reduce the radiation exposure dose to on-site maintenance personnel. The invention also greatly improves loading and unloading efficiency and can greatly enhance economic benefits.

[0008] To further optimize the hooking method of the hook, the hook assembly also includes a rotating pin, the middle portion of which is rotatably connected to the side wall of the mounting rod; the lower end of the rotating pin extends beyond the lower side of the mounting rod, and the hook is disposed at the lower end of the rotating pin; and the drive assembly is used to drive the rotating pin in rotation. In this solution, by providing a rotating pin, the middle portion of the rotating pin is rotatably connected to the connecting rod. In this way, the lower end of the rotating pin can rotate the hook into the inner groove of the sealing ring, thereby ensuring close contact between the hook portion and the inner groove and reducing the movement of the sealing ring during the lifting process. The drive assembly can be driven by a rotary motor or a linear motor.

[0009] Further optimization, as a stable driving method, further includes a slide rail and slider assembly; the slide rail and slider assembly includes a slide rail fixed on the mounting rod, and a slider is slidably connected to the slide rail; the mounting rod and the slide rail are both arranged radially along the bottom plate; The output end of the driving assembly is connected to the slider and is used to drive the slider to perform linear motion; The upper end of the rotating pin has an elongated through-hole extending along its length. The sidewall of the slider includes a slide rod that passes through the elongated through-hole and can slide along the length of the elongated through-hole. In this embodiment, the drive assembly is preferably a pneumatic cylinder, the cylinder's extension and contraction direction being aligned with the length of the connecting rod and radially disposed along the bottom plate. The output end of the cylinder is connected to the slider, so that when driven by the cylinder, the slider moves. When the slider moves, the slide rod on the sidewall slides within the elongated through-hole on the rotating pin, thereby converting the cylinder's linear motion into the rotational motion of the rotating pin. This results in higher precision and smoother movement.

[0010] Further optimization is provided as a connection arrangement between the mounting rod and the pivot pin, wherein the side wall of the mounting rod has a placement slot, the upper and lower ends of which are open; the middle portion of the pivot pin is pivotally connected to the bottom surface of the placement slot, and the upper and lower ends of the pivot pin both extend out of the placement slot. In this embodiment, the connecting rod can preferably be an I-beam steel plate. In this way, the middle portion of the pivot pin can be pivotally connected to the web of the I-beam steel plate, and the upper and lower flanges of the I-beam steel plate each have a movable opening for the pivot pin to extend out, similar to the placement slot provided in the side wall of the connecting rod.

[0011] Further solutions: In order to precisely position the sealing ring, an intermediate plate is also included. The intermediate plate is annular and is fixed above the bottom plate and is coaxially arranged with the bottom plate. The outer circumferential ends of the intermediate plate are uniformly distributed with keyways, which mate with the keys on the inner side of the pressure vessel. In this solution, an intermediate plate is also provided above the base plate, and the two are coaxial and spaced apart. Keyways are provided at the circumferential ends of the intermediate plate. This allows the keyways at the ends of the intermediate plate to engage the keys on the inner circumference of the pressure vessel after the base plate and intermediate plate are simultaneously placed into the pressure vessel. As the base plate and intermediate plate are lowered, the keys slide within the keyways, allowing precise positioning of the base plate against the sealing ring.

[0012] Further optimization, in order to accurately position the sealing ring and reduce the movement of the sealing ring during the lifting process, a plurality of lifting components are connected between the middle plate and the bottom plate, and the plurality of lifting components are evenly distributed along the circumference of the bottom plate; The output end of the lifting assembly is provided with a gap stopper, which is used to drive the gap stopper up and down, and the gap stopper can be inserted into the gap between the sealing ring and the side wall of the sealing groove. In this solution, a gap stopper is also provided, and the gap stopper has a vertical plate that can move up and down under the drive of the lifting assembly. Due to the positioning of the intermediate plate, the gap stops can be directly opposite the gap between the sealing ring and the side wall of the sealing groove. Therefore, after the bottom plate presses on the sealing ring, the lifting assembly can drive the gap stops to move downward and insert them into the gap between the sealing ring and the side wall of the sealing groove, thereby squeezing the sealing ring itself toward the center, further precisely positioning the sealing ring, facilitating the claw to fix the sealing ring and prevent it from moving, and having high reliability.

[0013] Further optimization, as a specific structure of a lifting component, the lifting component includes a cylinder and a guide rod, the guide rod is connected between the middle plate and the bottom plate; the cylinder is fixed on the guide rod, the gap block and the guide rod are slidably connected; the output end of the cylinder is connected to the gap block.

[0014] Further optimized, as a specific structure of the gap stopper, the gap stopper is L-shaped, the horizontal side of the gap stopper is slidably connected to the guide rod, the vertical side of the gap stopper is located outside the bottom plate, and the length of the vertical side of the gap stopper is greater than the height of the bottom plate. The L-shaped gap stopper is used to limit the gap stopper. When the horizontal side of the gap stopper moves downward until it abuts the upper side of the bottom plate, the lower end of the vertical side of the gap stopper extends beyond the lower side of the bottom plate and can extend into the gap.

[0015] Further optimization is carried out, in order to fix the middle plate and the bottom plate, a plurality of supporting columns are connected between the middle plate and the bottom plate.

[0016] Further solutions: For rough positioning, a top guide assembly is also included. This top guide assembly comprises a guide plate detachably attached to the flange surface of the pressure vessel cylinder. The upper portion of the guide plate is connected to the external lifting equipment via a wire rope, and the lower portion is connected to the intermediate plate via a wire rope. In this solution, by installing the guide plate on the flange surface of the pressure vessel cylinder, the entire loading and unloading device can be temporarily fixed to the pressure vessel. The guide plate is used to roughly position the lower intermediate plate and bottom plate, facilitating further fine positioning of the lower intermediate plate and gap stop, and performing cylinder-driven operations.

[0017] Further optimization, as a specific structure of a guide plate, the guide plate is annular and is located at the middle opening of the flange surface of the pressure vessel cylinder; the guide plate is coaxially arranged with the flange surface and the intermediate plate respectively; the guide plate along its own circumferential upper and lower sides and the intermediate plate along its own circumferential upper side are distributed with a number of eye screws, and the eye screws are used to connect the wire rope. Among them, the intermediate plate is located in the lower middle position of the loading and unloading device, and 3 eye screws are installed on the upper surface for connection with the wire rope. Threaded holes are opened on the plate for connection with the support column and the air lifting component. Four key slots are opened at 0°, 90°, 180°, and 270° for positioning.

[0018] A further optimization, as a detachable connection method, includes several connecting rods distributed circumferentially around the guide plate. A guide ring is provided at the end of each connecting rod, distal from the guide plate, for fitting over a guide pin on the pressure vessel flange. In this solution, the use of several connecting rods of equal length arranged radially facilitates the coaxial arrangement of the guide plate and flange. Guide rings are provided at the ends of the connecting rods, while guide pins are provided circumferentially around the flange. The upper portion of the guide pins resembles a sliding post. During connection, the guide rings can be slid onto the sliding post and moved downward to achieve temporary fixation.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention provides an integrated reactor in-core sealing ring hoisting and loading device, which is mainly used for disassembly, installation and hoisting of the in-core sealing ring of the integrated reactor of a pressurized water reactor nuclear power plant, realizing safe and reliable loading and unloading functions; by using the loading and unloading device to load and unload the in-core sealing ring, the loading and unloading efficiency and quality of the in-core sealing ring can be improved, the labor intensity of on-site maintenance personnel can be reduced, and the radiation exposure dose of on-site maintenance personnel can be significantly reduced; (2) The present invention provides an integrated reactor core sealing ring lifting and loading and unloading device, which adopts a modular design and has a simple structure. The main modules are a top guide assembly, an intermediate plate, a cylinder, a bottom plate, a hook assembly, a slide rail slider assembly, a lifting assembly, a gap block, etc., which can be quickly replaced; (3) The present invention provides an integrated reactor core sealing ring lifting and loading and unloading device, which is driven by a cylinder and has a large thrust, converting the linear motion into the rotational motion of the hook around the pin shaft, so that the loading and unloading device can grab the core sealing ring; it has low requirements for users, strong adaptability, can maintain normal operation in low and high temperature environments, and is highly economical.

[0020] (4) The present invention provides an integrated reactor in-core sealing ring lifting and loading and unloading device, which uses a top guide assembly to achieve rough positioning of the loading and unloading device, a middle plate keyway and a gap block to achieve fine positioning, and a bottom plate to fix the in-core sealing ring when the hook opens and closes the claw to prevent it from moving, thereby having high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings: Figure 1 A schematic structural diagram of the integrated reactor in-core sealing ring assembly and disassembly device provided by the present invention; Figure 2 This is a schematic structural diagram of the rotating pin provided by the present invention.

[0022] Markings and corresponding parts names in the accompanying drawings: 100-top guide assembly, 101-guide plate, 102-connecting rod, 103-guide ring, 200-wire rope, 300-cylinder, 400-slide rail slider assembly, 401-slide rod, 500-middle plate, 600-hook assembly, 601-hook, 602-rotation pin, 603-long through hole, 700-bottom plate, 701-placement groove, 800-gap block, 900-lifting assembly, 1000-support column. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0024] Example 1: This example 1 provides an integrated reactor core sealing ring lifting and unloading device, such as Figure 1-Figure 2 As shown, including: Lifting parts; The bottom plate 700 is used to lift the bottom plate 700 into the pressure vessel. The bottom plate 700 is annular and is used to press on the sealing ring. Several mounting rods are evenly distributed circumferentially on the inner side of the base plate 700, and each mounting rod is provided with a driving assembly and a claw assembly 600; the claw assembly 600 includes a claw 601 that can extend into the inner groove of the sealing ring; the driving assembly is used to drive the claw assembly 600 to move so that the claw 601 extends into the inner groove of the sealing ring.

[0025] Compared with the existing technology, there are currently no similar in-core sealing ring loading and unloading devices abroad. Domestic nuclear power plants generally use manual loading and unloading. The in-core sealing rings are small in size, light in weight, and have a very small gap with the pressure vessel, making positioning and assembly difficult during loading and unloading. The present invention provides an integrated reactor in-core sealing ring lifting and loading and unloading device, which is mainly used for disassembly, installation and lifting of the in-core sealing rings of the integrated reactor of a pressurized water reactor nuclear power plant, thereby realizing safe and reliable loading and unloading functions. By using the loading and unloading device to load and unload the in-core sealing rings, the loading and unloading efficiency and quality of the in-core sealing rings can be improved, and the labor intensity of on-site maintenance personnel can be reduced. The specific solution includes: a lifting piece and a base plate 700. The lifting piece is used to lift the base plate 700 from the flange surface of the pressure vessel into the pressure vessel and close to the sealing ring. The base plate 700 is annular and adapts to the sealing ring. In this way, after the base plate 700 is lifted and inserted, the base plate 700 can press on the sealing ring, thereby maintaining the stability of the sealing ring lifting process and reducing the movement of the sealing ring. A central support is provided at the center of the base plate 700. The central support is circumferentially connected to the inner side of the base plate 700 by a plurality of mounting rods, wherein the mounting rods can be I-shaped steel bars. The drive assembly and the claw assembly 600 are both arranged on the mounting rod. During specific use, the drive assembly drives the claw 601 of the claw assembly 600 to move, so that the claw 601 extends into the inner groove of the inner side of the sealing ring. In this way, the sealing ring is grasped by the extension of the plurality of claws 601. When the base plate 700 is lifted, the sealing ring can be lifted to complete the removal of the sealing ring.

[0026] The above solution aims to achieve the following: using the loading and unloading device can reduce the labor intensity of on-site maintenance personnel and significantly reduce the radiation exposure dose to on-site maintenance personnel. The invention also greatly improves loading and unloading efficiency and can greatly enhance economic benefits.

[0027] In some embodiments, to optimize the hooking method of the hook claw 601, the hook claw assembly 600 further includes a rotating pin 602, the middle portion of which is rotatably connected to the side wall of the mounting rod; the lower end of the rotating pin 602 extends beyond the lower side of the mounting rod, and the hook claw 601 is disposed at the lower end of the rotating pin 602; and the driving assembly is used to drive the rotating pin 602 to rotate. In this embodiment, by providing the rotating pin 602, the middle portion of the rotating pin 602 is rotatably connected to the connecting rod 102, so that the lower end of the rotating pin 602 can rotate the hook claw 601 into the inner groove of the sealing ring, thereby ensuring close contact between the hook claw 601 and the inner groove and reducing the movement of the sealing ring during the lifting process. The driving assembly can be driven by a rotary motor or a linear motor.

[0028] In some embodiments, as a stable driving method, a slide rail and slider assembly 400 is further included; the slide rail and slider assembly 400 includes a slide rail fixed to the mounting rod, and a slider is slidably connected to the slide rail; the mounting rod and the slide rail are both arranged radially along the base plate 700; The output end of the driving assembly is connected to the slider and is used to drive the slider to perform linear motion; The upper end of the rotating pin 602 is provided with an elongated through-hole 603 along its length. The sidewall of the slider is provided with a slide bar 401, which passes through the elongated through-hole 603 and can slide along the length of the elongated through-hole 603. In this embodiment, the driving assembly is preferably a cylinder 300, the extension and contraction direction of the cylinder 300 being the same as the length direction of the connecting rod 102 and radially arranged along the bottom plate 700. The output end of the cylinder 300 is connected to the slider, so that the cylinder 300 can drive the slider to move. When the slider moves, the slide bar 401 on the sidewall can slide in the elongated through-hole 603 on the rotating pin 602, thereby converting the linear motion of the cylinder 300 into the rotational motion of the rotating pin 602, which has higher motion precision and smoother movement.

[0029] In some embodiments, as a connection arrangement between the mounting rod and the rotating pin 602, a placement slot 701 is defined in the sidewall of the mounting rod, with both the upper and lower ends of the placement slot 701 being open. The middle portion of the rotating pin 602 is rotatably connected to the bottom surface of the placement slot 701, and both the upper and lower ends of the rotating pin 602 extend out of the placement slot 701. In this embodiment, the connecting rod 102 can preferably be an I-beam steel plate. In this manner, the middle portion of the rotating pin 602 can be rotatably connected to the web of the I-beam steel plate, while the upper and lower flanges of the I-beam steel plate each have a movable opening for the rotating pin 602 to extend out, similar to the placement slot 701 defined in the sidewall of the connecting rod 102.

[0030] Example 2: This example 2 is further optimized based on example 1 and provides a precise positioning method.

[0031] In order to precisely position the sealing ring, an intermediate plate 500 is further included. The intermediate plate 500 is annular and fixed above the bottom plate 700 and is coaxially arranged with the bottom plate 700. The outer circumferential ends of the intermediate plate 500 are uniformly distributed with several keyways, which mate with the keys on the inner side of the pressure vessel. In this solution, an intermediate plate 500 is also provided above the bottom plate 700, and the two are coaxial and spaced apart. Several keyways are provided at the circumferential ends of the intermediate plate 500. This allows the keyways on the ends of the intermediate plate 500 to engage the keys on the inner circumference of the pressure vessel after the bottom plate 700 and the intermediate plate 500 are simultaneously placed into the pressure vessel. As the bottom plate 700 and the intermediate plate 500 are lowered, the keys can slide within the keyways, allowing precise positioning through the intermediate plate 500, ensuring that the bottom plate 700 is precisely pressed against the sealing ring.

[0032] In some embodiments, in order to precisely position the sealing ring and reduce the movement of the sealing ring during the lifting process, a plurality of lifting assemblies 900 are further connected between the intermediate plate 500 and the bottom plate 700. The plurality of lifting assemblies 900 are evenly distributed along the bottom plate 700. The output end of the lifting assembly 900 is provided with a gap stopper 800. The lifting assembly 900 is used to drive the gap stopper 800 up and down, and the gap stopper 800 can be inserted into the gap between the sealing ring and the side wall of the sealing groove. In this solution, a gap stopper 800 is also provided. The gap stopper has a vertical plate that can move up and down under the drive of the lifting assembly 900. Due to the positioning of the intermediate plate 500, several gap stops can be directly opposite the gap between the sealing ring and the side wall of the sealing groove. Therefore, after the bottom plate 700 is pressed against the sealing ring, the lifting assembly 900 can drive the several gap stops to move downward and insert them into the gap between the sealing ring and the side wall of the sealing groove, thereby squeezing the sealing ring itself toward the center to further accurately position the sealing ring, facilitate the claw 601 to fix the sealing ring and prevent it from moving, and have high reliability.

[0033] In some embodiments, as a specific structure of a lifting assembly 900, the lifting assembly 900 includes a cylinder 300 and a guide rod, the guide rod is connected between the middle plate 500 and the base plate 700; the cylinder 300 is fixed on the guide rod, and the gap block 800 is slidably connected to the guide rod; the output end of the cylinder 300 is connected to the gap block 800.

[0034] In some embodiments, as a specific structure of the gap stopper 800, the gap stopper 800 is L-shaped, with the horizontal side of the gap stopper 800 being slidably connected to the guide rod, the vertical side of the gap stopper 800 being located outside the bottom plate 700, and the length of the vertical side of the gap stopper 800 being greater than the height of the bottom plate 700. The L-shaped gap stopper 800 is used to limit the gap stopper 800. When the horizontal side of the gap stopper 800 moves downward until it abuts the upper side of the bottom plate 700, the lower end of the vertical side of the gap stopper 800 extends beyond the lower side of the bottom plate 700 and can extend into the gap.

[0035] In some embodiments, in order to fix the middle plate 500 and the bottom plate 700 , a plurality of supporting columns 1000 are connected between the middle plate 500 and the bottom plate 700 .

[0036] Example 3: This example 3 is a further optimization based on example 2, and provides a coarse positioning method.

[0037] For rough positioning, a top guide assembly 100 is also included. The top guide assembly 100 comprises a guide plate 101 detachably connected to the flange surface of the pressure vessel cylinder. The upper portion of the guide plate 101 is connected to external lifting equipment via a steel wire rope 200, and the lower portion of the guide plate 101 is connected to the intermediate plate 500 via a steel wire rope 200. In this solution, by providing the guide plate 101 on the flange surface of the pressure vessel cylinder, the entire loading and unloading apparatus can be temporarily secured to the pressure vessel. The guide plate 101 is then used to roughly position the lower intermediate plate 500 and bottom plate 700, facilitating further fine positioning of the lower intermediate plate 500 and gap stopper 800, and enabling the cylinder 300 to be driven.

[0038] In some embodiments, as a specific structure of a guide plate 101, the guide plate 101 is annular and is located at the central opening of the flange surface of the pressure vessel cylinder; the guide plate 101 is coaxially arranged with the flange surface and the intermediate plate 500; a number of eyebolts are distributed along the upper and lower sides of the guide plate 101 along its own circumferential direction, and along the upper side of the intermediate plate 500 along its own circumferential direction, and the eyebolts are used to connect the wire rope 200. Specifically, the intermediate plate 500 is located in the lower middle position of the loading and unloading device, and three eyebolts are installed on the upper surface for connecting with the wire rope 200. Threaded holes are opened on the plate for connection with the support column 1000 and the air lift assembly 900. Four key slots are opened at 0°, 90°, 180°, and 270° for positioning.

[0039] In some embodiments, as a detachable connection method, a plurality of connecting rods 102 are evenly distributed around the outer side of the guide plate 101. A guide ring 103 is provided at the end of each connecting rod 102 away from the guide plate 101. The guide ring 103 is designed to fit over a guide pin on the flange surface of the pressure vessel. In this embodiment, by radially disposing a plurality of connecting rods 102 of equal length, the guide plate 101 and the flange surface are conveniently arranged coaxially. The guide ring 103 is provided at the end of the connecting rod 102, while the flange surface is provided with a guide pin circumferentially. The upper portion of the guide pin is similar to a sliding post. During connection, the guide ring 103 can be slid onto the sliding post and moved downward to achieve temporary fixation.

[0040] Specific working principle: The present invention provides an integrated reactor in-core sealing ring lifting and loading and unloading device, which includes a top guide assembly 100, an intermediate plate 500, a cylinder 300, a bottom plate 700, a hook assembly 600, a slide rail slider assembly 400, a support column 1000, a lifting assembly 900, a gap block 800 and a wire rope 200.

[0041] During specific use, the middle plate 500 and the bottom plate 700 are first hoisted into the pressure vessel. After they are in place, the top guide plate 101 is fixed on the flange surface of the pressure vessel cylinder to achieve rough positioning. After the loading and unloading device is positioned in the pressure vessel cylinder, the bottom plate 700 is pressed on the sealing ring to prevent the position of the sealing ring from changing when the gap block 800 is lifted. The gap block 800 is installed on the lifting assembly 900, and the tail is connected to the control cylinder 300. The cylinder 300 controls it to slide up and down along the guide column, so that the gap block 800 is inserted into the gap between the sealing ring and the side wall of the sealing groove. The slide rail slider assembly 400 is installed on the bottom plate 700. The slider is connected to the hook 601 through a connecting pin and is connected to the cylinder 300, converting the linear motion into the rotational motion of the hook 601 around the pin shaft to complete the gripping of the sealing ring by the hook 601. After the loading and unloading device is in place on the sealing ring, the sealing ring gap stopper 800 is lifted upward by the cylinder 300, and then the sealing ring is hoisted. The above solution is mainly used for the removal, installation, and lifting of the sealing ring in the integrated reactor of the pressurized water reactor nuclear power plant, achieving safe and reliable loading and unloading functions. By using the loading and unloading device to load and unload the sealing ring in the core, the efficiency and quality of the loading and unloading of the sealing ring in the core can be improved, the labor intensity of on-site maintenance personnel can be reduced, and the radiation exposure dose of on-site maintenance personnel can be significantly reduced.

[0042] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated reactor in-core sealing ring lifting and unloading device, characterized in that: include: Lifting parts; A bottom plate (700), wherein the lifting member is used to lift the bottom plate (700) into the pressure vessel; the bottom plate (700) is annular and is used to press on the sealing ring; A plurality of mounting rods are evenly distributed around the inner side of the base plate (700), and each mounting rod is provided with a driving assembly and a hook assembly (600); the hook assembly (600) includes a hook (601) that can extend into the inner groove of the sealing ring; the driving assembly is used to drive the hook assembly (600) to move so that the hook (601) extends into the inner groove of the sealing ring.

2. The integrated reactor in-core sealing ring hoisting and unloading device according to claim 1, characterized in that: The hook assembly (600) further comprises a rotating pin (602), the middle portion of which is rotatably connected to the side wall of the mounting rod; the lower end of the rotating pin (602) extends beyond the lower side of the mounting rod, and the hook (601) is arranged at the lower end of the rotating pin (602); and the driving assembly is used to drive the rotating pin (602) to rotate.

3. The integrated reactor in-core sealing ring hoisting and unloading device according to claim 2, characterized in that: It also includes a slide rail and slider assembly (400); the slide rail and slider assembly (400) includes a slide rail fixed on the mounting rod, and a slider is slidably connected to the slide rail; the mounting rod and the slide rail are both radially arranged along the bottom plate (700); The output end of the driving assembly is connected to the slider and is used to drive the slider to perform linear motion; The upper end of the rotating pin (602) is provided with a long through hole (603) along its length direction, and the side wall of the slider is provided with a sliding rod (401), and the sliding rod (401) passes through the long through hole (603) and can slide along the length direction of the long through hole (603).

4. The integrated reactor in-core sealing ring hoisting and unloading device according to claim 3, characterized in that: The side wall of the mounting rod is provided with a placement slot (701), and the upper and lower ends of the placement slot (701) are both open; the middle portion of the rotating pin (602) is rotatably connected to the bottom surface of the placement slot (701), and the upper and lower ends of the rotating pin (602) both extend out of the placement slot (701).

5. The integrated reactor in-core sealing ring hoisting and unloading device according to any one of claims 1 to 4, characterized in that: It also includes an intermediate plate (500), the intermediate plate (500) is annular, the intermediate plate (500) is fixed above the bottom plate (700), and is coaxially arranged with the bottom plate (700); A plurality of key slots are evenly distributed on the circumferential end of the outer ring of the intermediate plate (500), and the key slots are adapted to the keys on the inner side of the pressure vessel.

6. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to claim 5, characterized in that: A plurality of lifting assemblies (900) are further connected between the intermediate plate (500) and the bottom plate (700), and the plurality of lifting assemblies (900) are evenly distributed in a circumferential direction along the bottom plate (700); The output end of the lifting component (900) is provided with a gap stopper (800), the lifting component (900) is used to drive the gap stopper (800) to move up and down, and the gap stopper (800) can be inserted into the gap between the sealing ring and the side wall of the sealing groove.

7. The integrated reactor in-core sealing ring hoisting and unloading device according to claim 6, characterized in that: The lifting assembly (900) comprises a cylinder and a guide rod, wherein the guide rod is connected between the middle plate (500) and the bottom plate (700); the cylinder is fixed on the guide rod, and the gap stopper (800) is slidably connected to the guide rod; and the output end of the cylinder is connected to the gap stopper (800).

8. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to claim 7, characterized in that: The gap stopper (800) is L-shaped, the horizontal side of the gap stopper (800) is slidably connected to the guide rod, the vertical side of the gap stopper (800) is located outside the bottom plate (700), and the length of the vertical side of the gap stopper (800) is greater than the height of the bottom plate (700).

9. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to claim 5, characterized in that: A plurality of supporting columns (1000) are also connected between the middle plate (500) and the bottom plate (700).

10. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to any one of claims 5 to 9, characterized in that: The hoisting member includes a top guide assembly (100), and the top guide assembly includes a guide plate (101) detachably connected to the flange surface of the pressure vessel cylinder. The upper part of the guide plate (101) is connected to the external hoisting equipment through a steel wire rope (200), and the lower part of the guide plate (101) is connected to the intermediate plate (500) through a steel wire rope (200).

11. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to claim 10, characterized in that: The guide plate (101) is annular and is located at the middle opening of the flange surface of the pressure vessel cylinder; the guide plate is coaxially arranged with the flange surface and the intermediate plate (500) respectively; a plurality of eyebolts are distributed on the upper and lower sides of the guide plate along its own annular direction and on the upper side of the intermediate plate (500) along its own annular direction, and the eyebolts are used to connect the wire rope (200).

12. The integrated reactor in-core sealing ring hoisting and loading and unloading device according to claim 10, characterized in that: A plurality of connecting rods (102) are evenly distributed on the outer side of the guide plate. A guide ring (103) is provided at one end of the connecting rod (102) away from the guide plate. The guide ring (103) is used to be sleeved on the guide bolt on the flange surface of the pressure vessel.

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