Seal ring replacement apparatus

Abstract

The application belongs to the technical field of nuclear power equipment, and particularly relates to a sealing ring replacement device, which comprises a mounting frame, a fixing mechanism, a lifting mechanism, a rotating mechanism, a stop ring dismounting mechanism, a screw dismounting mechanism, a hoisting mechanism and a camera mechanism, the fixing mechanism is connected to the mounting frame and is used for fixed connection with a pump shell of a reactor coolant pump; the lifting mechanism is used for driving the rotating mechanism to lift, the rotating mechanism is used for driving the stop ring dismounting mechanism and the screw dismounting mechanism to rotate, the stop ring dismounting mechanism and the screw dismounting mechanism are respectively used for dismounting a stop ring and a screw; the hoisting mechanism is used for connection with a hoisting hole of the sealing ring; and the camera mechanism is used for acquiring graphic information of the sealing ring, so as to acquire positioning information of the sealing ring; the mechanical and graphic positioning mode is adopted, mechanical dismounting of the sealing ring is realized, and the dismounting efficiency and the dismounting quality of the sealing ring are improved.

Description

Technical Field

[0001] This application belongs to the field of nuclear power equipment technology, and in particular relates to a sealing ring replacement device. Background Technology

[0002] In-service reactor coolant pumps (also known as main pumps) are key equipment in the reactor cooling system of nuclear power plants. They are mainly used to drive the circulation of coolant (such as light water or heavy water) within the reactor to achieve heat transfer and ensure the safe and stable operation of the reactor. In-service reactor coolant pumps consist of a pump casing and hydraulic components housed within it. The hydraulic components are sealed within the pump casing by sealing rings, which are fixed to the casing by screws. A retaining ring is fitted over the screws to restrict their rotation and reduce the risk of loosening. During prolonged operation or if components such as the retaining ring or screws are damaged, the sealing rings need to be replaced. However, in practice, manual replacement is difficult due to the height of the pump casing and the risk of high radiation exposure to personnel.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0004] The purpose of this application is to provide a sealing ring replacement device, including but not limited to solving the problem of the difficulty of manually replacing sealing rings in related technologies.

[0005] The technical solution adopted in this application embodiment is as follows: A sealing ring replacement device is provided for replacing the sealing ring of a reactor coolant pump. The sealing ring replacement device includes a mounting frame, a fixing mechanism, a lifting mechanism, a rotating mechanism, a stop ring disassembly and assembly mechanism, a screw disassembly and assembly mechanism, a hoisting mechanism, and a camera mechanism. The fixing mechanism is connected to the mounting frame and is used to fix it to the pump casing of the reactor coolant pump. The lifting mechanism includes a lifting drive component and a lifting frame. The lifting drive component is connected to the mounting frame and the lifting frame, and is used to drive the lifting frame to lift. The rotating mechanism includes a rotating drive component and a rotating frame. The rotating drive component is connected to the lifting frame and the rotating frame, and is used to drive the lifting frame to lift. A moving component drives the rotating frame to rotate; a stop ring assembly / disassembly mechanism is connected to the rotating frame and is used to assemble and disassemble the stop ring; a screw assembly / disassembly mechanism is connected to the rotating frame and is used to assemble and disassemble the screw; a lifting mechanism is connected to the rotating frame and is used to connect with the lifting hole of the sealing ring; a camera mechanism is connected to the rotating frame and is used to acquire graphic information of the sealing ring, thereby acquiring the positioning information of the sealing ring; a rotating drive component is electrically connected to the camera mechanism and is used to drive the rotating frame to rotate according to the positioning information of the sealing ring, so that the stop ring assembly / disassembly mechanism can be aligned with the preset stop ring, the screw assembly / disassembly mechanism can be aligned with the preset screw, and the lifting mechanism can be aligned with the lifting hole of the sealing ring.

[0006] Optionally, the stop ring removal and installation mechanism includes a stop mounting base, a stop lifting drive, a stop rotating drive, a stop connecting shaft, and a stop removal and installation tool. The stop mounting base is rotatably connected to the rotating frame, the stop lifting drive is connected to the stop mounting base, one end of the stop lifting drive is connected to the stop connecting shaft, and the other end of the stop connecting shaft is connected to the stop removal and installation tool. The stop lifting drive is used to drive the stop connecting shaft to move up and down along the axial direction of the stop connecting shaft. The stop rotating drive is connected to the stop mounting base and is used to drive the stop mounting base to rotate around the axis of the stop connecting shaft.

[0007] Optionally, the screw removal and installation mechanism includes a screw rotation drive and a rotating shaft. The screw rotation drive is connected to the rotating frame and one end of the rotating shaft is connected to the rotating shaft. The other end of the rotating shaft is used to connect to the nut of the screw. The screw rotation drive is used to drive the rotating shaft to rotate around its own axis.

[0008] Optionally, the sealing ring replacement device also includes a screw clamping mechanism, which includes at least one clamping module and a clamping connecting frame. The clamping connecting frame is connected to the rotating frame. The clamping module includes a clamping drive and two clamping plates. The clamping drive is connected to the two clamping plates and is used to drive the two clamping plates closer or further apart to clamp or loosen the screw.

[0009] Optionally, the sealing ring replacement device also includes multiple guide rods, which are spaced apart circumferentially along the sealing ring. The guide rods pass through the mounting bracket and the rotating bracket to be inserted into the screw holes of the sealing ring; multiple clamping modules are used to correspond one-to-one with the multiple guide rods.

[0010] Optionally, the rotating shaft is located between two clamping plates of a clamping module.

[0011] Optionally, the sealing ring replacement device also includes a foreign object grabber and a foreign object cover. The foreign object grabber is connected to the end of the rotating frame facing away from the lifting mechanism. The foreign object grabber is used to grab the foreign object cover to cover the opening of the sealing ring. The foreign object cover is used to receive foreign objects that fall into the sealing ring. The foreign object cover is provided with a first clearance groove for avoiding screws and a second clearance groove for avoiding lifting holes.

[0012] Optionally, the foreign object cover is provided with a gripping hole, and the foreign object gripping component includes a gripping cylinder and two gripping blocks. The gripping cylinder is connected to the end of the rotating frame facing away from the lifting mechanism. The gripping cylinder is connected to the two gripping blocks. The two gripping blocks can extend into the gripping hole under the drive of the lifting mechanism. The gripping cylinder is used to drive the two gripping blocks to move away from each other or move closer to each other, so that the two gripping blocks can abut against or separate from the hole wall of the gripping hole.

[0013] Optionally, the retaining ring removal and installation mechanism and the screw removal and installation mechanism are distributed α apart around the rotation axis of the rotating frame, and two adjacent screws are distributed β apart around the axis of the sealing ring, where α = M * β, and M is a positive integer.

[0014] Optionally, the hoisting mechanism includes a hoisting rod and a locking element. The hoisting rod includes a rod body and a threaded connection. The threaded connection is connected to one end of the rod body. The rod body passes through the mounting frame and the rotating frame. The threaded connection is threaded into the hoisting hole of the sealing ring. The locking element is connected to the end of the rod body facing away from the threaded connection. The locking element is used to lock the connection between the mounting frame and the rod body.

[0015] Optionally, the length of the bolted connection is greater than the depth of the lifting hole.

[0016] Optionally, the locking element is a nut, which is screwed onto the outside of the rod body and abuts against the surface of the mounting bracket opposite to the screwed portion.

[0017] Optionally, the fixing mechanism includes multiple fixing modules connected to the mounting frame. The multiple fixing modules are arranged at intervals along the circumference of the mounting frame, and the fixing modules are used to abut against the inner circumferential wall of the pump casing for fixing.

[0018] Optionally, the fixing module includes an abutment block and a screw rod. The mounting bracket has a connecting through hole, and the screw rod is screwed into the connecting through hole. One end of the screw rod is connected to the abutment block, which is used to abut against the inner peripheral wall of the pump casing.

[0019] The sealing ring replacement equipment provided in this application has at least one of the following technical effects: the sealing ring replacement equipment can accurately determine the position of the sealing ring using a camera mechanism. Based on the position information of the sealing ring, the sealing ring can be accurately disassembled and assembled through the cooperation of a rotation mechanism, a stop ring disassembly and assembly mechanism, a screw disassembly and assembly mechanism, and a hoisting mechanism. In addition, the accurate acquisition of the sealing ring position information using a camera mechanism eliminates the need for personnel to enter the pump casing, reducing the exposure dose. Furthermore, the stop ring disassembly and assembly mechanism, the screw disassembly and assembly mechanism, and the hoisting mechanism can be operated from inside the pump casing, which also reduces the difficulty of disassembling the sealing ring. Moreover, the use of mechanical and graphic positioning achieves mechanized disassembly and assembly of the sealing ring, which is beneficial to improving the disassembly efficiency and quality of the sealing ring.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the sealing ring replacement device and pump housing provided in some embodiments of this application.

[0023] Figure 2 An exploded view of a sealing ring replacement device and a pump housing provided for other embodiments of this application.

[0024] Figure 3 The diagram shows the structure of the sealing ring, screw, and retaining ring provided in some embodiments of this application.

[0025] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0026] Figure 5 Schematic diagram of the structure of the sealing ring replacement device provided in some embodiments of this application Figure 1 .

[0027] Figure 6 Schematic diagram of the structure of the sealing ring replacement device provided in some embodiments of this application Figure 2 .

[0028] Figure 7 For along Figure 6 Sectional view along the middle BB line.

[0029] Figure 8 Schematic diagram of the structure of the sealing ring replacement device provided in some embodiments of this application Figure 3 .

[0030] Figure 9 An exploded view of a sealing ring replacement device provided in some embodiments of this application.

[0031] Figure 10 for Figure 9 A magnified view of a section at point C.

[0032] Figure 11 This is a schematic diagram of the screw clamping mechanism and the foreign object grabbing component provided in some embodiments of this application.

[0033] Figure 12 This is a structural schematic diagram of a foreign object shield provided in some embodiments of this application.

[0034] Figure 13 Schematic diagram of the structure of the sealing ring replacement device provided in some embodiments of this application Figure 4 .

[0035] Figure 14 For along Figure 13 Sectional view of the DD line.

[0036] Figure 15 for Figure 14 A magnified view of a section at point E in the middle.

[0037] The following are the labeling elements in the figure:

[0038] 100. Sealing ring replacement equipment; 11. Mounting bracket; 111. Mounting plate; 1111. Guide hole; 1112. Operating hole; 112. Mounting ring; 1121. Clearance hole; 113. Bracket; 1131. Connecting through hole; 114. Protective cover; 115. Guide plate; 12. Fixing mechanism; 121. Fixing module; 1211. Abutment block; 1212. Screw; 1213. Rotating handle; 13. Lifting mechanism; 131. Lifting drive component; 1311. Lifting motor; 312. Screw jack; 1313. Gear transmission mechanism; 132. Lifting frame; 1321. Lifting body; 1322. Lifting sleeve; 14. Rotating mechanism; 141. Rotating drive component; 1411. Rotary motor; 1412. Connecting shaft; 142. Rotating frame; 1421. Rotating plate; 1422. Annular plate; 1423. Guide sleeve; 1424. Lifting sleeve; 15. Stop ring disassembly and assembly mechanism; 151. Stop mounting base; 152. Stop lifting drive component; 153. Stop 154. Rotary drive component; 155. Stop connecting shaft; 156. Stop disassembly / assembly tool; 157. Transmission mechanism; 16. Screw disassembly / assembly mechanism; 161. Screw rotary drive component; 162. Rotary shaft; 17. Lifting mechanism; 171. Lifting rod; 1711. Rod body; 1712. Screw connection; 172. Locking component; 18. Camera mechanism; 19. Screw clamping mechanism; 191. Clamping module; 1911. Clamping drive component; 1912. Clamping plate; 192. Clamping connecting frame; 20. Guide 21. Anchor rod; 21. Anti-foreign object gripper; 211. Gripping cylinder; 212. Gripping block; 22. Anti-foreign object cover; 221. First clearance groove; 222. Second clearance groove; 223. Gripping hole; 23. Linear slide rail; 24. Lifting ring; 200. Sealing ring; 210. Screw hole; 2101. Second groove; 220. Lifting hole; 300. Screw; 310. Nut; 311. First groove; 312. Tightening hole; 400. Stop ring; 500. Pump housing; 600. Lifting equipment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0041] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0046] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0047] In-service reactor coolant pumps are key equipment in the nuclear power plant reactor cooling system. They primarily drive the circulation of coolant (such as light water or heavy water) within the reactor to achieve heat transfer and ensure the safe and stable operation of the reactor. An in-service reactor coolant pump consists of a pump casing and hydraulic components. The pump casing has an installation space, with a lower through-hole and an upper through-hole at each end communicating with the installation space. The hydraulic components are installed in the installation space and sealed to the lower through-hole by a sealing ring. The sealing ring is fixed to the pump casing by screws, with a retaining ring covering the screw to restrict its rotation and reduce the risk of loosening. During prolonged operation or if the retaining ring or screws are damaged, the sealing ring needs to be replaced. However, in practice, manual replacement is used. Meanwhile, a dense layer of activated carbon deposits forms on the inner surface of the pump casing. The product has a high exposure dose rate, and maintenance personnel have to perform replacement work directly inside the pump casing, which limits the operation time and poses a high risk of exposure to high radiation doses, and also hinders the improvement of replacement efficiency. In addition, the large height difference between the upper and lower through holes of the pump casing means that personnel standing at the upper through hole of the pump casing using long-handled tools for remote operation pose a high risk of exposure to high radiation doses and a risk of falling, resulting in poor reliability. The screws are protected by retaining rings, but the retaining rings must be peeled off before the screws are removed and tightened after replacement. However, the retaining rings are prone to tearing during deformation, making remote operation from the upper through hole extremely difficult.

[0048] Based on this, this application provides a sealing ring replacement device that enables mechanized replacement of sealing rings, which helps reduce the difficulty of replacing sealing rings. By using machinery to replace manual labor, it can also reduce the radiation dose to manual personnel and improve replacement efficiency and quality.

[0049] In some embodiments, the sealing ring replacement device can be used during the overhaul of reactor coolant pumps, or in emergency replacement operations of sealing rings.

[0050] The following combination Figures 1-15 The sealing ring replacement device according to an embodiment of this application will be described.

[0051] like Figures 1-7As shown, in some embodiments, the sealing ring replacement device 100 is suitable for replacing the sealing ring 200 of a reactor coolant pump. The sealing ring replacement device 100 includes a mounting frame 11, a fixing mechanism 12, a lifting mechanism 13, a rotating mechanism 14, a stop ring disassembly and assembly mechanism 15, a screw disassembly and assembly mechanism 16, a hoisting mechanism 17, and a camera mechanism 18. The fixing mechanism 12 is connected to the mounting frame 11 and is used to fix it to the pump casing 500 of the reactor coolant pump. The lifting mechanism 13 includes a lifting drive component 131 and a lifting frame 132. The lifting drive component 131 is connected to the mounting frame 11 and the lifting frame 132. The lifting drive component 131 is used to drive the lifting frame 132 to lift. The rotating mechanism 14 includes a rotating drive component 141 and a rotating frame 142. The rotating drive component 141 is connected to the lifting frame 132 and the rotating frame 142. The rotating drive component 141 is used to drive the lifting frame 142 to lift. The rotating frame 142 is driven to rotate; the stop ring removal and installation mechanism 15 is connected to the rotating frame 142 and is used to remove and install the stop ring 400; the screw removal and installation mechanism 16 is connected to the rotating frame 142 and is used to remove and install the screw 300; the lifting mechanism 17 is connected to the rotating frame 142 and is used to connect with the lifting hole 220 of the sealing ring 200; the camera mechanism 18 is connected to the rotating frame 142 and is used to acquire graphic information of the sealing ring 200, thereby acquiring the positioning information of the sealing ring 200; the rotating drive component 141 is electrically connected to the camera mechanism 18 and is used to drive the rotating frame 142 to rotate according to the positioning information of the sealing ring 200, so that the stop ring removal and installation mechanism 15 can be aligned with the preset stop ring 400, the screw removal and installation mechanism 16 can be aligned with the preset screw 300, and the lifting mechanism 17 can be aligned with the lifting hole 220 of the sealing ring 200.

[0052] For ease of explanation, the accompanying drawings of the embodiments of this application use a frame structure to illustrate the pump housing 500. Of course, in actual products, the pump housing 500 adopts a shell structure.

[0053] Mounting frame 11 can refer to the main support body of sealing ring replacement equipment 100. Fixing mechanism 12, lifting mechanism 13 and rotating mechanism 14 are connected to mounting frame 11, which supports these components and reduces the risk of displacement and shaking of sealing ring replacement equipment 100 during sealing ring 200 replacement.

[0054] In some examples, the mounting bracket 11 includes a mounting plate 111 and a mounting ring 112. A lifting drive 131 is mounted on one side of the mounting plate 111, and the mounting ring 112 is mounted on the other side of the mounting plate 111. The mounting plate 111 is used to cover the upper through hole of the pump housing 500 to reduce the amount of foreign objects falling into the pump housing 500. The lifting drive 131 is located outside the pump housing 500 to reduce the risk of the lifting drive 131 contacting the pump housing 500. In addition, the mounting ring 112 extends into the upper through hole. The mounting ring 112 cooperates with the upper through hole to limit the installation of the sealing ring replacement device 100, so as to facilitate the installation of the sealing ring replacement device 100.

[0055] In some examples, the mounting bracket 11 is provided with a lifting ring 24, which is located on the mounting plate 111. The lifting ring 24 is used to connect with the lifting equipment 600, which can be a crane, gantry crane, etc. The lifting equipment 600 is used to lift the lifting equipment 600 to the upper part of the pump casing 500, thereby facilitating the sealing ring replacement equipment 100 to enter the pump casing 500 to perform the replacement operation of the sealing ring 200.

[0056] The fixing mechanism 12 can refer to a component used to fix the sealing ring replacement device 100 to the pump housing 500. The fixing mechanism 12 can be connected by means of snap-fit, threaded connection, adhesive, etc. For example, the fixing mechanism 12 can abut against the inner peripheral wall of the pump body to achieve a fixed connection between the sealing ring replacement device 100 and the pump housing 500. After the sealing ring replacement device 100 is fixed, it can provide stable support for the lifting mechanism 13, the rotating mechanism 14, the stop ring disassembly and assembly mechanism 15, the screw disassembly and assembly mechanism 16, the hoisting mechanism 17, and the camera mechanism 18, which is conducive to improving the efficiency and quality of the disassembly and assembly of the sealing ring 200.

[0057] The lifting mechanism 13 can refer to the component used to drive the rotation mechanism 14 to rise and fall. The lifting mechanism 13 includes a lifting drive component 131 and a lifting frame 132. The lifting drive component 131 can refer to the power component used to drive the lifting frame 132 to rise and fall, such as a linear module, cylinder, motor, etc. The lifting frame 132 can refer to the component that can rise and fall under the drive of the lifting drive component 131. The lifting frame 132 can serve as the mounting base for the rotation mechanism 14. The lifting drive component 131 is connected to the lifting frame 132, thereby driving the rotation mechanism 14 to rise and fall, as well as the components connected to the rotation mechanism 14, such as the stop ring disassembly and assembly mechanism 15, the screw disassembly and assembly mechanism 16, the hoisting mechanism 17, and the camera mechanism 18, to rise and fall. This allows the stop ring disassembly and assembly mechanism 15, the screw disassembly and assembly mechanism 16, the hoisting mechanism 17, and the camera mechanism 18 to move to the sealing ring 200 at the bottom of the pump housing 500, facilitating the disassembly of the sealing ring 200.

[0058] In some examples, the lifting drive 131 includes a lifting motor 1311 and a screw jack 1312. The lifting motor 1311 is mounted on the mounting plate 111 and is connected to the screw jack 1312 via a gear transmission mechanism 1313. The screw of the screw jack 1312 is connected to the lifting frame 132. The lifting motor 1311 outputs rotational power, which is transmitted to the screw jack 1312 via the gear transmission mechanism 1313, thereby driving the screw of the screw jack 1312 to move up and down, thus realizing the lifting of the lifting frame 132. There are two screw jacks 1312, which are located on opposite sides of the rotary drive 141 to improve the lifting stability of the lifting frame 132. In addition, the lifting drive 131 adopts a lifting structure of lifting motor 1311 and screw jack 1312, which has a large load capacity, which is conducive to driving the lifting frame 132 to lift stably and can also better meet the needs of replacing heavy sealing rings 200.

[0059] In some examples, the mounting frame 11 also includes a guide plate 115, which is connected to the side of the mounting plate 111 facing away from the lifting drive 131. The guide plate 115 is located inside the mounting ring 112. The lifting frame 132 is connected to the guide plate 115 by a linear slide rail 23. The guiding effect of the linear slide rail 23 helps to improve the lifting stability of the lifting frame 132.

[0060] The rotating mechanism 14 can refer to the component used to drive the stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17, and the camera mechanism 18 to rotate. The rotating mechanism 14 includes a rotating drive component 141 and a rotating frame 142. The rotating drive component 141 can refer to a power component used to drive the rotating frame 142 to rotate, such as a motor. The rotating frame 142 can refer to a component that can rotate under the drive of the rotating drive component 141. The rotating frame 142 can serve as the stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17, and the camera mechanism 18. The mounting base of mechanism 18, the rotary drive 141 is connected to the rotary frame 142, thereby driving the rotary frame 142 to rotate and the components connected to the rotary frame 142, such as the stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17 and the camera mechanism 18, to rotate. This allows the stop ring removal and installation mechanism 15 and the screw removal and installation mechanism 16 to align with the stop ring 400 and the screw 300 on the sealing ring 200, and the hoisting mechanism 17 and the camera mechanism 18 to align with the hoisting hole 220 of the sealing ring 200, facilitating the removal of the sealing ring 200.

[0061] In some cases, multiple screws 300 are typically provided along the circumference of the sealing ring 200, with the screws 300 spaced apart to improve the reliability of the sealing ring 200 installation. The retaining ring removal and installation mechanism 15 and the screw removal and installation mechanism 16, driven by the rotating frame 142, can remove and install different screws 300 and retaining rings 400. Multiple lifting holes 220 are provided circumferentially on the sealing ring 200 to provide multiple lifting points for the sealing ring 200, improving the reliability of the lifting process.

[0062] In some examples, there are 12 screws 300, which are evenly spaced along the circumference of the sealing ring 200. After the screw removal mechanism 16 removes one screw 300, the next screw 300 can be removed by rotating the rotating frame 142 by a preset angle. Similarly, after the stop ring removal mechanism 15 removes one stop ring 400, the next stop ring 400 can be removed by rotating the rotating frame 142 by a preset angle. There are three lifting holes 220, which are located between the screw holes 210 of two adjacent sealing rings 200 and are evenly spaced.

[0063] In some examples, the rotation drive 141 includes a rotary motor 1411 and a connecting shaft 1412. The rotary motor 1411 is connected to one end of the connecting shaft 1412, and the other end of the connecting shaft 1412 is connected to the rotating frame 142. The rotary motor 1411 drives the connecting shaft 1412 to rotate, thereby driving the rotating frame 142 to rotate. The lifting frame 132 includes a lifting body 1321 and a lifting sleeve 1322. A rotary motor 1411 is connected to the lifting body 1321. The lifting body 1321 is connected to the guide plate 115 via a linear slide rail 23. The lifting sleeve 1322 is sleeved on the connecting shaft 1412. One end of the lifting sleeve 1322 is connected to the lifting body 1321, and the other end of the lifting sleeve 1322 is rotatably connected to the connecting shaft 1412 via bearings or the like. The lifting sleeve 1322 can protect the connecting shaft 1412 and improve the stability of rotation. In addition, the lifting sleeve 1322 and the connecting shaft 1412 cooperate to make the rotation drive point of the rotating frame 142 located at the lower part of the rotating frame 142, which is beneficial to improving the rotation stability of the rotating frame 142.

[0064] In some examples, the rotating frame 142 includes a rotating plate 1421, which is fixedly connected to the connecting shaft 1412. The stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17, and the camera mechanism 18 are connected to the rotating plate 1421. The camera mechanism 18 is located on the lower side of the rotating plate 1421 to better obtain images of the sealing ring 200. The rotating plate 1421 can provide a larger installation position for the stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17, and the camera mechanism 18, which is beneficial to the arrangement of the stop ring removal and installation mechanism 15, the screw removal and installation mechanism 16, the hoisting mechanism 17, and the camera mechanism 18.

[0065] The retaining ring disassembly and assembly mechanism 15 can refer to a component used for disassembling and assembling the retaining ring 400. The retaining ring 400 is sleeved on the outside of the nut 310 of the screw 300. The nut 310 has a first groove 311 on its circumference. The circumferential wall of the retaining ring 400 is recessed so as to be inserted into the first groove 311. The screw hole 210 of the sealing ring 200 has a second groove 2101 on its hole wall. The circumferential wall of the retaining ring 400 protrudes so as to be inserted into the second groove 2101. In this way, the screw 300 is limited.

[0066] During the disassembly of the stop ring 400, the stop ring disassembly mechanism 15 uses a tool to insert between the stop ring 400 and the first groove 311 to push the recessed part of the stop ring 400 out of the first groove 311, and / or uses a tool to insert between the stop ring 400 and the second groove 2101 to push the protruding part of the stop ring 400 out of the second groove 2101, thereby completing the peeling of the stop ring 400, releasing the limiting function of the stop ring 400, and allowing the stop ring 400 to be removed from the nut 310 of the screw 300.

[0067] During the installation of the stop ring 400, the stop ring disassembly and assembly mechanism 15 uses a tool inserted between the stop ring 400 and the wall of the screw hole 210 to press the stop ring 400 towards the inside, thereby squeezing the stop ring 400 into the first groove 311, and / or, uses a tool inserted between the stop ring 400 and the outer wall of the nut 310 to press the stop ring 400 towards the outside, squeezing the stop ring 400 into the second groove 2101, thereby achieving the limiting installation of the stop ring 400.

[0068] The lifting mechanism 17 can refer to the component used for lifting the sealing ring 200. The lifting mechanism 17 is screwed to the lifting hole 220 of the sealing ring 200, thereby realizing the fixed connection between the sealing ring 200 and the sealing ring replacement device 100. This facilitates the sealing ring 200 to be moved out or installed into the pump housing 500 together with the sealing ring replacement device 100, thereby realizing the disassembly and assembly of the sealing ring 200.

[0069] The camera mechanism 18 can refer to the component used to acquire the image of the sealing ring 200. The camera mechanism 18 includes a camera, a TV detection device, etc. After the camera mechanism 18 acquires the image of the sealing ring 200, it can obtain the positioning information of the sealing ring 200 after analysis and calculation. Based on the positioning information, the rotation angle of the rotating frame 142 is calculated and analyzed, thereby controlling the rotating drive component 141 to drive the rotating frame 142 to rotate the corresponding calculated rotation angle. This allows the screw removal and installation mechanism 16 to align with the preset screw 300, thereby completing the removal and installation of the screw 300. The stop ring removal and installation mechanism 15 can align with the preset stop ring 400 to perform the removal and installation of the stop ring 400. It can also align the lifting mechanism 17 with the lifting hole 220 of the sealing ring 200, thereby completing the connection between the lifting mechanism 17 and the sealing ring 200.

[0070] In some examples, the sealing ring 200 is provided with a marking structure. By capturing an image of the marking structure, the positional information of the screw holes 210 and the lifting holes 220 of the sealing ring 200 can be determined. Thus, based on the positional information of the screw holes 210 and the lifting holes 220, the rotation angle of the rotating frame 142 can be accurately controlled. The marking structure can be a protrusion, a hole, or other similar structure.

[0071] In some examples, the sealing ring 200 can also be based directly on the lifting hole 220. By taking an image of the lifting hole 220, the position information of the lifting hole 220 can be calculated. Then, the position information of the screw hole 210 of the sealing ring 200 can be calculated based on the position information of the lifting hole 220. In this way, the rotation angle of the rotating frame 142 can be accurately controlled based on the position information of the screw hole 210 and the lifting hole 220.

[0072] When the sealing ring 200 needs to be disassembled, the sealing ring replacement device 100 can be hoisted into the pump housing 500 using the hoisting equipment 600. The fixing mechanism 12 then fixes the sealing ring replacement device 100 to the pump housing 500. Next, the lifting mechanism 13 drives the rotating mechanism 14 to descend. The descent of the rotating mechanism 14 causes the connected stop ring disassembly and assembly mechanism 15, screw disassembly and assembly mechanism 16, and camera mechanism 18 to descend. The camera mechanism 18 captures images of the sealing ring 200. Based on the image information of the sealing ring 200, the positioning of the sealing ring 200 is calculated and analyzed. Based on the positioning information of the sealing ring 200, the rotating mechanism 14 drives the rotating frame 142 to rotate via the rotating drive component 141. The rotation of the rotating frame 142 causes the connected stop ring removal and installation mechanism 15 to rotate by a certain angle, aligning the stop ring removal and installation mechanism 15 with the preset stop ring 400. The stop ring removal and installation mechanism 15 then removes the preset stop ring 400 from the nut 310 of the screw 300. Similarly, all stop rings 400 on the sealing ring 200 can be removed in a preset order. Furthermore, the rotating mechanism 14, based on the positioning information of the sealing ring 200... Based on the positioning information of 200, the rotary drive 141 drives the rotary frame 142 to rotate. The rotation of the rotary frame 142 causes the screw removal and installation mechanism 16 connected to it to rotate at a certain angle, so that the screw removal and installation mechanism 16 is aligned with the preset screw 300. The screw removal and installation mechanism 16 then unscrews the preset screw 300 from the sealing ring 200. Similarly, all screws 300 on all sealing rings 200 can be unscrewed in a preset order. After all the stop rings 400 and screws 300 are removed, the rotary mechanism 14 then rotates according to the sealing ring 200. Based on the positioning information, the rotary drive 141 drives the rotary frame 142 to rotate, enabling the hoisting mechanism 17 to connect with the hoisting hole 220 of the sealing ring 200. After the hoisting mechanism 17 connects with the sealing ring 200, the lifting drive 131 drives the lifting frame 132 to rise, thereby completely separating the sealing ring 200 from the pump casing 500. The fixing mechanism 12 is released from the fixed connection with the pump casing 500, and then the hoisting equipment 600 is used to lift the sealing ring replacement equipment 100 and the sealing ring 200 out of the pump casing 500, thus completing the disassembly of the sealing ring 200.

[0073] When the sealing ring 200 needs to be installed, screws 300 and retaining rings 400 are inserted into the sealing ring 200. After the lifting mechanism 17 is connected to the sealing ring 200, the lifting equipment 600 is used to lift the sealing ring replacement device 100 and the sealing ring 200 into the pump housing 500. Then, the fixing mechanism 12 fixes the sealing ring replacement device 100 to the pump housing 500. The fixing connection between the lifting mechanism 17 and the sealing ring 200 is then released. The lifting mechanism 13 then drives the rotating mechanism 14 to descend. The descent of the rotating mechanism 14 drives the retaining ring disassembly and assembly mechanism 15, screw disassembly and assembly mechanism 16, camera mechanism 18, and sealing ring 400 connected to it. As the sealing ring 200 descends, the camera mechanism 18 captures an image of the sealing ring 200. Based on the image information, the positioning information of the sealing ring 200 is calculated and analyzed. According to the positioning information of the sealing ring 200, the rotating mechanism 14, driven by the rotating drive component 141, drives the rotating frame 142 to rotate. The rotation of the rotating frame 142 causes the connected sealing ring 200 to rotate. After the screw holes 210 of the sealing ring 200 are aligned with the screw holes on the pump housing 500, the hoisting mechanism 17 separates from the sealing ring 200, and the sealing ring 200 is placed inside the pump housing 500. Then, the rotating mechanism 14, based on the positioning information of the sealing ring 200... Based on the positioning information, the rotary drive 141 drives the rotary frame 142 to rotate. The rotation of the rotary frame 142 causes the screw removal and installation mechanism 16 connected to it to rotate at a certain angle, so that the screw removal and installation mechanism 16 aligns with the preset screws 300. The screw removal and installation mechanism 16 tightens the preset screws 300, realizing the connection between the sealing ring 200 and the pump housing 500. Similarly, all the screws 300 on all the sealing rings 200 can be tightened in a preset order. According to the positioning information of the sealing ring 200, the rotary drive 141 drives the rotary frame 142 to rotate, and the rotation of the rotary frame 142 causes the screw removal and installation mechanism 16 connected to it to rotate at a certain angle. The retaining ring removal and installation mechanism 15 is rotated at a certain angle so that it is aligned with the preset retaining ring 400. The retaining ring removal and installation mechanism 15 then installs the preset retaining ring 400 onto the nut 310 of the screw 300. Similarly, all retaining rings 400 on the sealing ring 200 can be fixed in a preset order. After all retaining rings 400 and screws 300 are fixed in place, the fixing mechanism 12 is released from the fixed connection with the pump housing 500. Then, the sealing ring replacement device 100 is lifted out of the pump housing 500 by the hoisting equipment 600. Thus, the installation of the sealing ring 200 is completed.

[0074] By adopting the technical solution of this embodiment, the position of the sealing ring 200 can be accurately determined using the camera mechanism 18. Based on the position information of the sealing ring 200, the sealing ring 200 can be accurately disassembled and assembled by the cooperation of the rotating mechanism 14, the stop ring disassembly and assembly mechanism 15, the screw disassembly and assembly mechanism 16, and the hoisting mechanism 17. In addition, by accurately obtaining the position information of the sealing ring 200 using the camera mechanism 18, personnel do not need to enter the pump housing 500, reducing the exposure dose to personnel. Furthermore, the stop ring disassembly and assembly mechanism 15, the screw disassembly and assembly mechanism 16, and the hoisting mechanism 17 can be operated from inside the pump housing 500, which also reduces the difficulty of disassembling the sealing ring 200. In addition, the use of mechanical and graphic positioning methods realizes the mechanized disassembly and assembly of the sealing ring 200, which is beneficial to improving the disassembly efficiency and disassembly and assembly quality of the sealing ring 200.

[0075] In addition, by driving the rotating frame 142 to rise and fall by the lifting drive 131, it can be used to replace the sealing ring 200 of the in-service reactor coolant pump at different heights; by driving the rotating frame 142 to rotate at different angles by the rotating drive 141, it can be used to replace the sealing ring 200 with different numbers of screws 300. The sealing ring replacement device 100 of this application embodiment has good versatility.

[0076] Please refer to the following: Figures 8-10 As shown, in some embodiments, the stop ring removal and installation mechanism 15 includes a stop mounting base 151, a stop lifting drive 152, a stop rotating drive 153, a stop connecting shaft 154, and a stop removal and installation tool 155. The stop mounting base 151 is rotatably connected to the rotating frame 142. The stop lifting drive 152 is connected to the stop mounting base 151. One end of the stop lifting drive 152 is connected to the stop connecting shaft 154, and the other end of the stop connecting shaft 154 is connected to the stop removal and installation tool 155. The stop lifting drive 152 is used to drive the stop connecting shaft 154 to move up and down along the axial direction of the stop connecting shaft 154. The stop rotating drive 153 is connected to the stop mounting base 151 and is used to drive the stop mounting base 151 to rotate around the axis of the stop connecting shaft 154.

[0077] The stop mounting base 151 can refer to a component used to support the stop lifting drive component 152. The stop mounting base 151 is rotatably mounted on the rotating frame 142. For example, the rotating plate 1421 is provided with a rotating hole. The stop mounting base 151 can be rotatably mounted in the rotating hole by means of bearings or the like. The stop mounting base 151 can rotate around the axis of the stop connecting shaft 154, thereby driving the stop disassembly and assembly tool 155 to rotate, thereby squeezing and deforming the recessed or protruding parts at different positions around the stop ring 400, so as to realize the disassembly and assembly of the stop ring 400.

[0078] The stop rotation drive 153 can refer to the component that drives the stop mounting base 151 to rotate. The stop rotation drive 153 can be a motor or other components. The stop rotation drive 153 can be directly connected to the stop mounting base 151, or it can be connected through a transmission mechanism 156, such as a gear transmission mechanism, belt transmission mechanism, chain transmission mechanism, etc. The connection through the transmission mechanism 156 can change the power transmission path, making the distribution of the stop ring disassembly and assembly mechanism 15 more flexible.

[0079] The stop lifting drive component 152 can refer to the component used to drive the stop connecting shaft 154 and the stop disassembly / assembly tool 155 to rise and fall. The stop lifting drive component 152 can be a linear module, cylinder, electric push rod, or other components. The stop lifting drive component 152 can drive the stop connecting shaft 154 and the stop disassembly / assembly tool 155 to fall, so that the stop disassembly / assembly tool 155 can be inserted between the nut 310 and the stop ring 400 or between the stop ring 400 and the hole wall of the screw hole 210, thereby squeezing and deforming the stop ring, thus realizing the disassembly / assembly of the stop ring 400.

[0080] The stop connecting shaft 154 can refer to a component used to connect the stop lifting drive component 152 and the stop disassembly / assembly tool 155. Both ends of the stop connecting shaft 154 are connected to the stop lifting drive component 152 and the stop disassembly / assembly tool 155, respectively. The stop disassembly / assembly tool 155 may include one tool or two tools. The axial direction of the stop connecting shaft 154 can be found in [reference needed]. Figure 7 The Z direction in the equation.

[0081] When the stop-removal tool 155 includes a tool, the stop-removal tool 155 can remove the stop ring 400 and also lock the stop ring 400.

[0082] When the stop removal tool 155 includes two tools, one tool is used to remove the stop ring 400, and the other tool is used to lock the stop ring 400.

[0083] In some examples, the shape of the stop removal tool 155 is adapted to the shape of the first groove 311 and the second groove 2101 to better compress the stop ring 400 and reduce the risk of damage to the stop ring 400.

[0084] In some examples, the stop tool 155 may be rod-shaped with a pointed end for better insertion between the nut 310 and the stop ring 400, and between the stop ring 400 and the wall of the screw hole 210.

[0085] When the rotating frame 142 moves the stop disassembly tool 155 to the position with the stop ring 400, the stop lifting drive 152 can drive the stop connecting shaft 154 and the stop disassembly tool 155 to descend, so that the stop disassembly tool 155 can be inserted between the nut 310 and the stop ring 400 or between the stop ring 400 and the wall of the screw hole 210, thereby compressing and deforming the stop ring 400, forcing the stop ring 400 out of the first groove 311 or the second groove 2101 or squeezing it out of the first groove 311 or the second groove 2101. Then, the stop lifting drive 152 can drive the stop connecting shaft 154 and the stop disassembly and assembly tool 155 to rise and fall. After the stop disassembly and assembly tool 155 leaves the stop ring 400, the stop rotation drive 153 drives the stop mounting base 151 to rotate, thereby driving the stop disassembly and assembly tool 155 to rotate to the next first groove 311 or second groove 2101, thereby realizing the extrusion deformation of the stop ring 400 at the next position, until the locking effect of the stop ring 400 is released or realized.

[0086] By adopting the technical solution of this embodiment, the stop lifting drive 152 independently drives the stop disassembly and assembly tool 155 to rise and fall, which helps to reduce the risk of interference between the screw disassembly and assembly mechanism 16 caused by the overall lifting and lowering of the rotating frame 142. The stop rotation drive 153 can drive the stop disassembly and assembly tool 155 to rotate, so as to squeeze different positions of the stop ring 400 and realize the disassembly and assembly of the stop ring 400.

[0087] In some embodiments, the screw removal and installation mechanism 16 includes a screw rotation drive 161 and a rotation shaft 162. The screw rotation drive 161 is connected to the rotation frame 142. One end of the screw rotation drive 161 is connected to the rotation shaft 162, and the other end of the rotation shaft 162 is used to connect to the nut 310 of the screw 300. The screw rotation drive 161 is used to drive the rotation shaft 162 to rotate around its own axis.

[0088] The screw rotation drive 161 can refer to a component used to drive the rotating shaft 162 to rotate, so as to tighten or loosen the screw 300. The screw rotation drive 161 can be a motor or other components.

[0089] The rotating shaft 162 can be used to connect the screw rotation drive 161 and the nut 310 of the screw 300. One end of the rotating shaft 162 is connected to the screw rotation drive 161, and the other end of the rotating shaft 162 can be inserted into the tightening hole 312 of the nut 310. The shape of the other end of the rotating shaft 162 is adapted to the shape of the tightening hole 312. The screw rotation drive 161 drives the rotating shaft 162 to rotate, thereby driving the screw 300 to rotate, thus realizing the tightening and loosening of the screw 300, and realizing the assembly and disassembly of the screw 300.

[0090] In some examples, the screw rotation drive 161 is mounted on the upper side of the rotating plate 1421, and the rotating shaft 162 is mounted on the lower side of the rotating plate 1421 to facilitate the connection of the rotating shaft 162 with the nut 310.

[0091] After the rotating frame 142 rotates into position, the rotating shaft 162 aligns with the tightening hole 312 of the nut 310. The lifting drive 131 drives the rotating frame 142 to descend, so that the rotating shaft 162 is inserted into the tightening hole 312. Then, the screw rotation drive 161 is activated to drive the rotating shaft 162 to rotate, thereby loosening or tightening the screw 300, realizing the disassembly and assembly of the screw 300.

[0092] By adopting the technical solution of this embodiment, the screw disassembly and assembly mechanism 16 adopts the structure of screw rotation drive 161 and rotation shaft 162, which has a simple structure and the disassembly and assembly operation of screw 300 is simple, which is conducive to improving the disassembly and assembly efficiency of screw 300.

[0093] Please refer to the following: Figure 11 As shown, in some embodiments, the sealing ring replacement device 100 further includes a screw clamping mechanism 19, which includes at least one clamping module 191 and a clamping connecting frame 192. The clamping connecting frame 192 is connected to the rotating frame 142. The clamping module 191 includes a clamping drive 1911 and two clamping plates 1912. The clamping drive 1911 is connected to the two clamping plates 1912 and is used to drive the two clamping plates 1912 to move closer or further away to clamp or loosen the screw 300.

[0094] After the screw 300 is loosened by the screw removal mechanism 16, the screw clamping mechanism 19 can clamp the screw 300, thereby clamping the screw 300 out of the screw hole 210 of the sealing ring 200, so that the screw 300 of the sealing ring 200 can be used for other purposes, such as for the insertion of the guide rod 20 to guide the sealing ring 200 replacement device into the pump housing 500.

[0095] The screw clamping mechanism 19 includes a clamping module 191 and a clamping connecting frame 192. The clamping connecting frame 192 is used to connect the rotating frame 142 and the clamping module 191. The clamping module 191 is used to clamp the screw 300. The number of clamping modules 191 is one or more. The multiple clamping modules 191 are distributed circumferentially along the clamping connecting frame 192, so that multiple screws 300 can be clamped at the same time.

[0096] The clamping module 191 includes a clamping drive 1911 and two clamping plates 1912. The clamping drive 1911 drives the two clamping plates 1912 to move closer together, thereby clamping the screw 300. The clamping drive 1911 also drives the two clamping plates 1912 to move further apart, thereby releasing the screw 300. The clamping drive 1911 can be a cylinder, such as a finger cylinder. The clamping connecting bracket 192 is connected to the lower side of the rotating bracket 142 to facilitate the clamping of the clamping module 191.

[0097] After the screw 300 is loosened, the rotating frame 142 drives the clamping module 191 to rotate. After the clamping module 191 is aligned with the corresponding screw 300, the rotating frame 142 descends, and the screw 300 enters between the two gripping blocks 212. The clamping drive 1911 of the clamping module 191 drives the two gripping blocks 212 to move closer, thereby clamping the screw 300. Then, the rotating frame 142 rises, and the screw 300 moves out of the screw hole 210 of the sealing ring 200. The empty screw hole 210 of the sealing ring 200 can be used for the guide rod 20 to facilitate the removal of the sealing ring 200.

[0098] By adopting the technical solution of this embodiment, the screw clamping mechanism 19 can remove the screw 300 out of the screw hole 210 of the sealing ring 200. The empty screw hole 210 can be used for the guide rod 20 to provide a guiding function, making the use of the sealing ring replacement device 100 more reliable.

[0099] In some embodiments, the sealing ring replacement device 100 further includes a plurality of guide rods 20, which are distributed circumferentially around the sealing ring 200. The guide rods 20 pass through the mounting bracket 11 and the rotating bracket 142 to be inserted into the screw holes 210 of the sealing ring 200. A plurality of clamping modules 191 are used to correspond one-to-one with the plurality of guide rods 20.

[0100] The guide rod 20 passes through the screw hole 210 of the sealing ring 200 and the screw hole of the pump housing 500, so that the sealing ring 200 moves along the axial direction of the guide rod 20 during the process of lifting the sealing ring 200 away from the pump housing 500 and lifting the sealing ring 200 into the pump housing 500 (see reference). Figure 7 The Z-direction movement of the sealing ring 200 reduces its sway and positions it relative to the pump casing 500, facilitating accurate installation. Multiple guide rods 20 are distributed circumferentially around the sealing ring 200; for example, three guide rods 20 can be inserted into screw holes adjacent to the lifting hole 220 to facilitate obtaining positioning information from the lifting hole 220.

[0101] For example, the mounting plate 111 is provided with a guide hole 1111, and the rotating frame 142 also includes an annular plate 1422, which is located between the mounting plate 111 and the rotating plate 1421. A guide sleeve 1423 is connected between the annular plate 1422 and the rotating plate 1421. The guide rod 20 passes through the guide hole 1111 and the guide sleeve 1423 in sequence and is then inserted into the screw hole 210 of the sealing ring 200 and the screw hole of the pump housing 500, so that the guide rod 20 can play a guiding role. The annular plate 1422 shields the guide hole 1111 and has a shielding function, which can shield the radiation of the inner wall of the pump housing 500 and reduce the radiation dose to personnel.

[0102] The number of clamping modules 191 is equal to the number of guide rods 20. When the rotating frame 142 drives the clamping connecting frame 192 to rotate to a preset angle, the multiple clamping modules 191 and the multiple screw holes 210 of the sealing rings 200 corresponding to the multiple guide rods 20 are arranged one-to-one. In this way, the clamping module 191 can remove all the screws 300 in the screw holes 210 of the sealing rings 200 required by the guide rods 20 at once, which is convenient for subsequent installation of the guide rods 20.

[0103] During the installation of the sealing ring 200, before the sealing ring replacement device 100 enters the pump housing 500, the screws 300 and the stop ring 400 are placed into the screw holes 210 of the sealing ring 200. The sealing ring 200 leaves multiple screw holes 210 empty. Multiple guide rods 20 are inserted into the empty screw holes 210 one by one. The two clamping plates 1912 of each clamping module 191 clamp the screws 300. After the lifting drive component 131 drives the rotating frame 142 to descend a certain height, multiple guide rods 20 are pulled out. The lifting drive component 131 drives the rotating frame 142 to continue to descend, so that the screws 300 clamped by each clamping module 191 can be inserted into the empty screw holes 210 one by one, which facilitates the subsequent tightening of the screws 300.

[0104] By adopting the technical solution of this embodiment, multiple clamping modules 191 are set one-to-one with multiple guide rods 20, which can remove the screws 300 from the screw holes 210 of the sealing ring 200 corresponding to the guide rod 20 at once. In addition, during the installation of the sealing ring 200, multiple clamping modules 191 can clamp multiple screws 300 corresponding to the guide rod 20 at once without the need for subsequent addition of screws 300, which helps to reduce the difficulty of replacing the sealing ring 200.

[0105] In some embodiments, the rotating shaft 162 is located between two clamping plates 1912 of a clamping module 191.

[0106] There is one screw removal and installation mechanism 16. The rotating shaft 162 of the screw removal and installation mechanism 16 is located between the two clamping plates 1912 of one of the clamping modules 191. The rotating shaft 162 extends below the clamping plates 1912 and can be inserted into the tightening hole 312 of the screw 300.

[0107] By adopting the technical solution of this embodiment, the rotating shaft 162 is located between the two clamping plates 1912. After the guide rod 20 is pulled out, the clamping plate 1912 puts the screw 300 into the corresponding screw hole 210, and the rotating shaft 162 can quickly tighten the screw 300, which is beneficial to improving the installation efficiency of the sealing ring 200.

[0108] Please refer to the following: Figure 12 As shown, in some embodiments, the sealing ring replacement device 100 further includes a foreign object gripper 21 and a foreign object cover 22. The foreign object gripper 21 is connected to the end of the rotating frame 142 facing away from the lifting mechanism 13. The foreign object gripper 21 is used to grip the foreign object cover 22 to cover the opening of the sealing ring 200. The foreign object cover 22 is used to receive foreign objects that fall into the sealing ring 200. The foreign object cover 22 is provided with a first clearance groove 221 for avoiding the screw 300 and a second clearance groove 222 for avoiding the lifting hole 220.

[0109] The foreign object grabber 21 is used to grab the foreign object cover 22, which is used to cover the opening of the sealing ring 200 to block the opening of the sealing ring 200, thereby preventing foreign objects from entering the pipeline system through the sealing ring 200. The foreign object cover 22 can be recessed towards the inside of the sealing ring 200 to form a basin-shaped structure, so that the foreign object cover 22 can accommodate foreign objects. The periphery of the foreign object cover 22 is provided with a first clearance groove 221 for the screw 300 and a second clearance groove 222 for the lifting hole 220. The first clearance groove 221 exposes the screw 300, which is convenient for the screw 300 to be installed and removed. The second clearance groove 222 exposes the lifting hole 220, which is convenient for the connection between the lifting mechanism 17 and the sealing ring 200.

[0110] Foreign objects may be dust, waste liquid, screws 300, or other components. For example, screws 300 removed from the sealing ring 200 by the screw clamping mechanism 19 can fall into the foreign object protection cover 22 for storage.

[0111] The foreign object gripper 21 is used to place the foreign object cover 22 at the opening of the sealing ring 200, and can also remove the foreign object cover 22 from the opening of the sealing ring 200. The foreign object gripper 21 can be a cylinder, a robotic arm, or other components.

[0112] Before the sealing ring 200 is removed, the lifting drive 131 drives the rotating frame 142 to descend. The rotating frame 142 moves the foreign object cover 22 and the foreign object gripper 21 downward. After the foreign object cover 22 covers the opening of the sealing ring 200, the foreign object gripper 21 releases the foreign object cover 22. The foreign object cover 22 covers the opening of the sealing ring 200 to facilitate the subsequent removal of the screw 300 and the stop ring 400.

[0113] Before the sealing ring 200 is installed, the foreign object cover 22 is placed over the opening of the sealing ring 200. After the sealing ring 200 is installed, the foreign object grabber 21 grabs the foreign object cover 22. Finally, the foreign object cover 22 is moved out of the pump casing 500 along with the sealing ring replacement equipment 100.

[0114] By adopting the technical solution of this embodiment, the cooperation between the foreign object shield 22 and the foreign object grabber 21 can cover the opening of the sealing ring 200, reducing the risk of foreign objects falling into the pipeline system from the opening of the sealing ring 200. In particular, the foreign object shield 22 can accommodate the screws 300 removed from the sealing ring 200 to facilitate the subsequent installation of the guide rod 20.

[0115] In some embodiments, the foreign object shield 22 is provided with a gripping hole 223, and the foreign object gripping member 21 includes a gripping cylinder 211 and two gripping blocks 212. The gripping cylinder 211 is connected to the end of the rotating frame 142 facing away from the lifting mechanism 13. The gripping cylinder 211 is connected to the two gripping blocks 212. The two gripping blocks 212 can extend into the gripping hole 223 under the drive of the lifting mechanism 13. The gripping cylinder 211 is used to drive the two gripping blocks 212 to move away from each other or move closer to each other, so that the two gripping blocks 212 can abut against or separate from the hole wall of the gripping hole 223.

[0116] The foreign object shield 22 is provided with a gripping hole 223 for cooperating with the foreign object gripper 21. The foreign object gripper 21 includes a gripping cylinder 211 and two gripping blocks 212. The gripping cylinder 211 can drive the two gripping blocks 212 to move closer or further apart. The gripping cylinder 211 can be a finger cylinder, etc. Under the drive of the lifting drive 131, the two gripping blocks 212 extend into the gripping hole 223, and the gripping cylinder 211 drives the two gripping blocks 212 to move further apart, so that the two gripping blocks 212 respectively abut against the opposite sides of the hole wall of the gripping hole 223. By connecting the gripping cylinder 211 and the foreign object shield 22, the foreign object shield 22 can be moved to the opening of the sealing ring 200 or removed from the opening of the sealing ring 200 under the drive of the lifting drive component 131. The gripping cylinder 211 drives the two gripping blocks 212 to move closer to each other, thereby reducing the distance between the two gripping blocks 212 and separating the gripping blocks 212 from the hole wall of the gripping hole 223. This allows the foreign object shield 22 to be separated from the foreign object gripping component 21, so that the foreign object shield 22 covers the opening of the sealing ring 200.

[0117] By adopting the technical solution of this embodiment, the foreign object grabbing component 21 adopts the structure of grabbing cylinder 211 and two grabbing blocks 212. The movement and covering operation of the foreign object cover 22 is simple and convenient for disassembling and assembling the sealing ring 200.

[0118] In some embodiments, the stop ring removal and installation mechanism 15 and the screw removal and installation mechanism 16 are distributed α apart around the rotation axis of the rotating frame 142, and two adjacent screws 300 are distributed β apart around the axis of the sealing ring 200, where α = M * β, and M is a positive integer.

[0119] The rotation axis of the rotating frame 142 coincides with the axis of the sealing ring 200. The rotation axis of the rotating frame 142 is parallel to the Z direction. The stop ring disassembly and assembly mechanism 15 and the screw disassembly and assembly mechanism 16 are distributed circumferentially along the rotation axis of the rotating frame 142. A first auxiliary plane is perpendicular to the rotation axis of the rotating frame 142. The intersection of the rotation axis of the rotating frame 142 and the first auxiliary plane is the first auxiliary point. The intersection of the axis of the rotating shaft 162 and the first auxiliary plane is the second auxiliary point. The intersection of the axis of the stop connecting shaft 154 and the first auxiliary plane is the third auxiliary point. The angle between the line connecting the first auxiliary point and the second auxiliary point and the line connecting the first auxiliary point and the third auxiliary point is α. The intersection points of the axes of two adjacent screws 300 with the first auxiliary plane are the fourth auxiliary point and the fifth auxiliary point, respectively. The angle between the line connecting the first auxiliary point and the fourth auxiliary point and the line connecting the first auxiliary point and the fifth auxiliary point is β, where α = M * β, and M is a positive integer. This allows the rotating shaft 162 to be positioned relative to the screw 300, and the stop connecting shaft 154 to be positioned relative to the other screw 300. In this way, the disassembly and assembly of the screw 300 and the disassembly and assembly of the stop ring 400 can be carried out simultaneously, which is beneficial to improving the disassembly and assembly efficiency of the sealing ring 200.

[0120] For example, α = 30°, β = 30°, M = 1.

[0121] Of course, in other embodiments, the removal and installation of the retaining ring 400 and the screw 300 can also be carried out in steps.

[0122] Please refer to the following: Figure 13 and Figure 14 As shown, in some embodiments, the hoisting mechanism 17 includes a hoisting rod 171 and a locking member 172. The hoisting rod 171 includes a rod body portion 1711 and a threaded portion 1712. The threaded portion 1712 is connected to one end of the rod body portion 1711. The rod body portion 1711 passes through the mounting frame 11 and the rotating frame 142. The threaded portion 1712 is threaded into the hoisting hole 220 of the sealing ring 200. The locking member 172 is connected to the end of the rod body portion 1711 facing away from the threaded portion 1712. The locking member 172 is used to lock the connection between the mounting frame 11 and the rod body portion 1711.

[0123] The lifting rod 171 is a cylindrical rod, with the rod body 1711 having a cylindrical structure. The outer circumference of the threaded connection part 1712 has external threads, and the lifting hole 220 has internal threads. The threaded connection part 1712 is screwed into the lifting hole 220, which enables the connection between the lifting rod 171 and the sealing ring 200. The upper part of the rod body 1711 is connected to the mounting bracket 11 through the locking member 172, thus fixing the sealing ring 200 and the sealing ring replacement device 100 together, making it convenient for the sealing ring 200 to be installed into or removed from the pump housing 500 along with the sealing ring replacement device 100. The locking member 172 can be a nut, pin, or other components.

[0124] For example, a lifting sleeve 1424 is connected between the annular plate 1422 and the rotating plate 1421. The lifting rod 171 passes through the guide hole 1111 and the lifting sleeve 1424 in sequence and is then screwed into the lifting hole 220 of the sealing ring 200. In this way, the lifting rod 171 and the guide rod 20 share a guide hole 1111. The guide sleeve 1423 and the lifting sleeve 1424 are distributed at intervals along the circumference of the annular plate 1422. The guide hole 1111 is an arc-shaped hole extending around the rotation axis of the rotating frame 142, which facilitates the installation of the guide rod 20 and the lifting rod 171.

[0125] In particular, before the sealing ring 200 is disassembled, the guide rod 20 can be inserted into the lifting hole 220 of the sealing ring 200 to position the sealing ring replacement device 100, which facilitates the subsequent disassembly of the screw 300 and the stop ring 400.

[0126] By adopting the technical solution of this embodiment, the hoisting mechanism 17 adopts the structure of hoisting rod 171 and locking member 172. The hoisting structure is simple and the hoisting operation is simple, which is conducive to improving the disassembly and assembly efficiency of sealing ring 200.

[0127] In some embodiments, the length H of the screw connection 1712 is greater than the depth of the lifting hole 220.

[0128] By adopting the technical solution of this embodiment, the length H of the screw connection 1712 is greater than the depth of the lifting hole 220, so that during the process of screwing the screw connection 1712 into the lifting hole 220, the screw connection 1712 passes through the lifting hole 220 and abuts against the pump housing 500. The force between the screw connection 1712 and the pump housing 500 is used to push the sealing ring 200 out of the lower through hole of the pump housing 500, thereby separating the sealing ring 200 from the pump housing 500, which facilitates subsequent lifting.

[0129] In some embodiments, the locking member 172 is a nut, which is screwed onto the outside of the rod body portion 1711 and is used to abut against the surface of the mounting bracket 11 opposite to the screwed portion 1712.

[0130] The nut is directly screwed onto the outside of the rod body 1711, and the nut abuts against the upper surface of the mounting plate 111, so that the nut will not pass through the guide hole 1111, thereby fixing the sealing ring 200 to the mounting plate 111 and facilitating the hoisting of the sealing ring 200.

[0131] By adopting the technical solution of this embodiment, after the screwed part 1712 is screwed into the lifting hole 220 of the sealing ring 200, the upper nut is tightened to fix the sealing ring 200 and the sealing ring replacement device 100. The lifting operation of the sealing ring 200 is simple and helps to improve the disassembly and assembly efficiency of the sealing ring 200.

[0132] Please refer to the following: Figure 15 As shown, in some embodiments, the fixing mechanism 12 includes a plurality of fixing modules 121 connected to the mounting frame 11. The plurality of fixing modules 121 are arranged at intervals along the circumference of the mounting frame 11, and the fixing modules 121 are used to abut against and fix to the inner peripheral wall of the pump housing 500.

[0133] The fixing module 121 abuts against the inner peripheral wall of the pump housing 500, thereby achieving relative fixation between the sealing ring replacement device 100 and the pump housing 500. Multiple fixing modules 121 are arranged at intervals along the circumference of the mounting frame 11, so that multiple abutment points can be formed between the sealing ring replacement device 100 and the pump housing 500, which helps to improve the stability of the sealing ring replacement device 100 fixed to the pump housing 500 and improve the reliability of the sealing ring 200 disassembly and assembly.

[0134] For example, the fixing module 121 is used to abut against the wall of the upper through hole of the pump housing 500. There are multiple fixing modules 121, which are installed on the mounting ring 112 and evenly spaced along the circumference of the mounting ring 112.

[0135] By adopting the technical solution of this embodiment, the fixing mechanism 12 adopts a fixing method that abuts against the inner peripheral wall of the pump housing 500, eliminating the need to set up additional fixing structures on the pump housing 500 and reducing the risk of damage to the pump housing 500.

[0136] In some embodiments, the fixing module 121 includes an abutment block 1211 and a screw 1212. The mounting bracket 11 is provided with a connecting through hole 1131. The screw 1212 is screwed into the connecting through hole 1131. One end of the screw 1212 is connected to the abutment block 1211. The abutment block 1211 is used to abut against the inner peripheral wall of the pump housing 500.

[0137] For example, the mounting ring 112 has a clearance hole 1121 penetrating the peripheral sidewall of the mounting ring 112. A bracket 113 is provided on the inner side of the mounting ring 112. A connecting through hole 1131 is provided on the bracket 113, with an internal thread inside the connecting through hole 1131. A screw 1212 has an external thread and passes through the connecting through hole 1131, with the internal and external threads meshing. An abutment block 1211 is located between the mounting ring 112 and the bracket 113, and is positioned opposite the clearance hole 1121. After the screw 1212 passes through the connecting through hole 1131, it connects with the abutment block 1211. Thus, by rotating the screw 1212, one end of the abutment block 1211 protrudes out of the clearance hole 1121, thereby abutting against the wall of the upper through hole of the pump housing 500. The component driving the screw 1212 to rotate can be a motor or a rotating handle 1213, etc.

[0138] In some embodiments, the screw 1212 is rotated by a rotating handle 1213. The mounting plate 111 is provided with an operating hole 1112, through which the rotating handle 1213 is exposed, thereby facilitating the rotation of the rotating handle 1213. A protective cover 114 is provided on the inner side of the mounting ring 112. The protective cover 114 covers the bracket 113 and shields the operating hole 1112. The protective cover 114 can play a shielding role and reduce the radiation dose to personnel.

[0139] By adopting the technical solution of this embodiment, the fixing module 121 adopts the fixing method of the abutment block 1211 and the screw 1212, which has a simple structure and the fixing operation of the fixing module 121 is simple, which is conducive to improving the assembly and disassembly efficiency of the sealing ring 200.

[0140] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealing ring replacement device, suitable for replacing the sealing ring of a reactor coolant pump, characterized in that, The sealing ring replacement device includes: Mounting rack; A fixing mechanism is connected to the mounting frame, and the fixing mechanism is used to fix the pump casing of the reactor coolant pump; A lifting mechanism includes a lifting drive component and a lifting frame. The lifting drive component is connected to the mounting frame and the lifting frame. The lifting drive component is used to drive the lifting frame to lift. A rotating mechanism includes a rotating drive and a rotating frame. The rotating drive is connected to the lifting frame and the rotating frame. The rotating drive is used to drive the rotating frame to rotate. A stop ring assembly / disassembly mechanism is connected to the rotating frame, and the stop ring assembly / disassembly mechanism is used to assemble and disassemble the stop ring; A screw removal and installation mechanism is connected to the rotating frame, and the screw removal and installation mechanism is used to remove and install screws; A hoisting mechanism is connected to the rotating frame, and the hoisting mechanism is used to connect with the hoisting hole of the sealing ring; A camera mechanism is connected to the rotating frame. The camera mechanism is used to acquire graphic information of the sealing ring, thereby acquiring the positioning information of the sealing ring. The rotating drive is electrically connected to the camera mechanism. The rotating drive is used to drive the rotating frame to rotate according to the positioning information of the sealing ring, so that the stop ring disassembly and assembly mechanism can be aligned with the preset stop ring, the screw disassembly and assembly mechanism can be aligned with the preset screw, and the hoisting mechanism can be aligned with the hoisting hole of the sealing ring. The stop ring assembly / disassembly mechanism includes a stop mounting base, a stop lifting drive, a stop rotating drive, a stop connecting shaft, and a stop assembly / disassembly tool. The stop mounting base is rotatably connected to the rotating frame. The stop lifting drive is connected to the stop mounting base. One end of the stop lifting drive is connected to the stop connecting shaft, and the other end of the stop connecting shaft is connected to the stop assembly / disassembly tool. The stop lifting drive is used to drive the stop connecting shaft to move up and down along its axial direction. The stop rotating drive is connected to the stop mounting base and is used to drive the stop mounting base to rotate around the axis of the stop connecting shaft.

2. The sealing ring replacement device according to claim 1, characterized in that: The screw assembly / disassembly mechanism includes a screw rotation drive and a rotation shaft. The screw rotation drive is connected to the rotating frame and one end of the rotation shaft is connected to the other end of the rotation shaft. The screw rotation drive is used to drive the rotation shaft to rotate around its own axis.

3. The sealing ring replacement device according to claim 2, characterized in that: The sealing ring replacement device further includes a screw clamping mechanism, which includes at least one clamping module and a clamping connecting frame. The clamping connecting frame is connected to the rotating frame. The clamping module includes a clamping drive and two clamping plates. The clamping drive is connected to the two clamping plates. The clamping drive is used to drive the two clamping plates closer or further apart to clamp or loosen the screw.

4. The sealing ring replacement device according to claim 3, characterized in that: The sealing ring replacement device also includes multiple guide rods, which are spaced apart circumferentially along the sealing ring. The guide rods pass through the mounting frame and the rotating frame to be inserted into the screw holes of the sealing ring. The clamping modules are used to correspond one-to-one with the guide rods.

5. The sealing ring replacement device according to claim 4, characterized in that: The rotating shaft is located between the two clamping plates of one of the clamping modules.

6. The sealing ring replacement device according to claim 3, characterized in that: The sealing ring replacement device also includes a foreign object grabber and a foreign object cover. The foreign object grabber is connected to the end of the rotating frame facing away from the lifting mechanism. The foreign object grabber is used to grab the foreign object cover to cover the opening of the sealing ring. The foreign object cover is used to receive foreign objects that fall into the sealing ring. The foreign object cover is provided with a first clearance groove for avoiding the screw and a second clearance groove for avoiding the lifting hole.

7. The sealing ring replacement device according to claim 6, characterized in that: The foreign object protection cover is provided with a gripping hole. The foreign object gripping component includes a gripping cylinder and two gripping blocks. The gripping cylinder is connected to the end of the rotating frame facing away from the lifting mechanism. The gripping cylinder is connected to the two gripping blocks. The two gripping blocks can extend into the gripping hole under the drive of the lifting mechanism. The gripping cylinder is used to drive the two gripping blocks to move away from each other or move closer to each other, so that the two gripping blocks can abut against or separate from the hole wall of the gripping hole.

8. The sealing ring replacement device according to any one of claims 1 to 7, characterized in that: The stop ring assembly / disassembly mechanism and the screw assembly / disassembly mechanism are distributed α apart around the rotation axis of the rotating frame, and two adjacent screws are distributed β apart around the axis of the sealing ring, where α = M * β, and M is a positive integer.

9. The sealing ring replacement device according to any one of claims 1 to 7, characterized in that: The hoisting mechanism includes a hoisting rod and a locking member. The hoisting rod includes a rod body and a threaded connection. The threaded connection is connected to one end of the rod body. The rod body passes through the mounting frame and the rotating frame. The threaded connection is screwed into the hoisting hole of the sealing ring. The locking member is connected to the end of the rod body facing away from the threaded connection. The locking member is used to lock the connection between the mounting frame and the rod body.

10. The sealing ring replacement device according to claim 9, characterized in that: The length of the threaded connection is greater than the depth of the lifting hole.

11. The sealing ring replacement device according to claim 9, characterized in that: The locking element is a nut, which is screwed onto the outside of the rod body and is used to abut against the surface of the mounting bracket opposite to the screwed portion.

12. The sealing ring replacement device according to any one of claims 1 to 6, characterized in that: The fixing mechanism includes multiple fixing modules connected to the mounting frame. The multiple fixing modules are arranged at intervals along the circumference of the mounting frame, and the fixing modules are used to abut against and fix the pump housing to the inner circumferential wall.

13. The sealing ring replacement device according to claim 12, characterized in that: The fixing module includes an abutment block and a screw. The mounting bracket has a connecting through hole. The screw is screwed into the connecting through hole. One end of the screw is connected to the abutment block. The abutment block is used to abut against the inner peripheral wall of the pump housing.

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