Sealing ring replacement equipment

Abstract

The invention belongs to the technical field of nuclear power equipment, and particularly relates to sealing ring replacement equipment which comprises a mounting frame, a fixing mechanism, a lifting mechanism, a rotating mechanism, a check ring dismounting and mounting mechanism, a screw dismounting and mounting mechanism, a hoisting mechanism and a camera shooting mechanism. The fixing mechanism is used for being fixedly connected with a pump shell of the reactor coolant pump. The lifting mechanism is used for driving the rotating mechanism to ascend and descend, the rotating mechanism is used for driving the check ring disassembling and assembling mechanism and the screw disassembling and assembling mechanism to rotate, and the check ring disassembling and assembling mechanism and the screw disassembling and assembling mechanism rotate to be used for disassembling and assembling a check ring and a screw correspondingly. The hoisting mechanism is used for being connected with a hoisting hole of the sealing ring. The camera mechanism is used for acquiring graphic information of the sealing ring so as to acquire positioning information of the sealing ring; and mechanical disassembly and assembly of the sealing ring are achieved in a mechanical and pattern positioning mode, and the disassembly and assembly efficiency and the disassembly and assembly quality of the sealing ring can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear power equipment, and particularly relates to a sealing ring replacement device. BACKGROUND

[0002] The in-service reactor coolant pump (also referred to as a main pump) is a key device in the reactor cooling system of a nuclear power plant, and is mainly used to drive the circulation of coolant (such as light water, heavy water, etc.) in the reactor to achieve heat transfer and ensure the safe and stable operation of the reactor. The in-service reactor coolant pump comprises a pump shell and hydraulic components arranged in the pump shell, the hydraulic components are sealingly installed in the pump shell through a sealing ring, the sealing ring is fixed to the pump shell through a screw, an outer sleeve of the screw is provided with a stop ring, the rotation of the screw is limited by the stop ring, and the risk of loosening of the screw is reduced; in the case of long-time operation or damage of the stop ring, the screw or other components, the sealing ring needs to be replaced; however, in the actual replacement process, manual replacement is adopted, the height of the pump shell is high, manual replacement is difficult, and the personnel have a high risk of receiving a dose.

[0003] The above statements are only used to provide background technical information related to the application, and do not necessarily constitute the prior art. SUMMARY

[0004] The purpose of the embodiments of the application is to provide a sealing ring replacement device, which solves the problem of high difficulty of manual replacement of the sealing ring in the related art.

[0005] The technical scheme adopted by the embodiment of the application is: a sealing ring replacement device is provided for replacing a sealing ring of a reactor coolant pump, and the sealing ring replacement device 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 fixedly connecting with a pump shell of the reactor coolant pump; the lifting mechanism comprises a lifting drive element and a lifting frame; the lifting drive element is connected to the mounting frame and connected with the lifting frame; the lifting drive element is used for driving the lifting frame to lift; the rotating mechanism comprises a rotating drive element and a rotating frame; the rotating drive element is connected to the lifting frame and connected with the rotating frame; the rotating drive element is used for driving the rotating frame to rotate; the stop ring dismounting mechanism is connected to the rotating frame and is used for dismounting a stop ring; the screw dismounting mechanism is connected to the rotating frame and is used for dismounting a screw; the hoisting mechanism is connected to the rotating frame and is used for connecting with a hoisting hole of the sealing ring; the camera mechanism is connected to the rotating frame and is used for acquiring image information of the sealing ring, so as to acquire positioning information of the sealing ring; the rotating drive element is electrically connected with the camera mechanism; the rotating drive element is used for driving the rotating frame to rotate according to the positioning information of the sealing ring, so that the stop ring dismounting mechanism can be aligned with a preset stop ring, the screw dismounting mechanism can be aligned with a preset screw, and the hoisting mechanism can be aligned with the hoisting hole of the sealing ring.

[0006] Optionally, the stop ring dismounting mechanism comprises a stop mounting seat, a stop lifting drive element, a stop rotating drive element, a stop connecting shaft and a stop dismounting tool; the stop mounting seat is rotationally connected to the rotating frame; the stop lifting drive element is connected to the stop mounting seat; one end of the stop connecting shaft is connected with the stop lifting drive element; the other end of the stop connecting shaft is connected with the stop dismounting tool; the stop lifting drive element is used for driving the stop connecting shaft to lift along the axial direction of the stop connecting shaft; the stop rotating drive element is connected with the stop mounting seat and is used for driving the stop mounting seat to rotate around the axis of the stop connecting shaft.

[0007] Optionally, the screw dismounting mechanism comprises a screw rotating drive element and a rotating shaft; the screw rotating drive element is connected to the rotating frame; one end of the rotating shaft is connected with the screw rotating drive element; the other end of the rotating shaft is used for connecting with a screw nut of the screw; the screw rotating drive element is used for driving the rotating shaft to rotate around the axis of the rotating shaft.

[0008] Optionally, the sealing ring replacement device further comprises a screw clamping mechanism; the screw clamping mechanism comprises at least one clamping module and a clamping connecting frame; the clamping connecting frame is connected to the rotating frame; the clamping module comprises a clamping drive element and two clamping plates; the clamping drive element is connected with the two clamping plates; the clamping drive element is used for driving the two clamping plates to move close to or away from each other, so as to clamp or release the screw.

[0009] Optionally, the sealing ring replacement device further comprises a plurality of guide rods spaced along the circumference of the sealing ring, the guide rods passing through the mounting frame and the rotating frame to be inserted into the screw holes of the sealing ring; and a plurality of clamping modules corresponding to the plurality of guide rods.

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

[0011] Optionally, the sealing ring replacement device further comprises a foreign matter prevention grabbing member and a foreign matter prevention cover, the foreign matter prevention grabbing member being connected to the end of the rotating frame away from the lifting mechanism, the foreign matter prevention grabbing member being used to grab the foreign matter prevention cover to cover the opening of the sealing ring, the foreign matter prevention cover being used to receive the foreign matter dropped into the sealing ring, the foreign matter prevention cover being provided with a first avoiding groove for avoiding the screw and a second avoiding groove for avoiding the lifting hole.

[0012] Optionally, the foreign matter prevention cover is provided with a grabbing hole, the foreign matter prevention grabbing member comprises a grabbing cylinder and two grabbing blocks, the grabbing cylinder being connected to the end of the rotating frame away from the lifting mechanism, the grabbing cylinder being connected with the two grabbing blocks, the two grabbing blocks being capable of extending into the grabbing hole under the driving of the lifting mechanism, the grabbing cylinder being used to drive the two grabbing blocks to relatively move away from or relatively move close to each other, so that the two grabbing blocks can abut against or separate from the hole wall of the grabbing hole.

[0013] Optionally, the stop ring dismounting mechanism and the screw dismounting mechanism are spaced apart by an angle a around the rotation axis of the rotating frame, and two adjacent screws are spaced apart by an angle β around the axis of the sealing ring, wherein a = M*β, M being a positive integer.

[0014] Optionally, the lifting mechanism comprises a lifting rod and a locking member, the lifting rod comprising a rod body portion and a screwing portion, the screwing portion being connected with one end of the rod body portion, the rod body portion passing through the mounting frame and the rotating frame, the screwing portion being screwed into the lifting hole of the sealing ring, the locking member being connected to the end of the rod body portion away from the screwing portion, the locking member being used to lock the mounting frame and the rod body portion.

[0015] Optionally, the length of the screwing portion is greater than the hole depth of the lifting hole.

[0016] Optionally, the locking member is a nut, the nut being screwed outside the rod body portion, the nut being used to abut against the surface of the mounting frame away from the screwing portion.

[0017] Optionally, the fixing mechanism further comprises a plurality of fixing modules connected to the mounting frame, the plurality of fixing modules being arranged along the circumference of the mounting frame, the fixing modules being used to abut against and fix the inner circumferential wall of the pump shell.

[0018] Optionally, the fixing module comprises an abutting block and a screw rod, the mounting frame being provided with a connecting through hole, the screw rod being screwed into the connecting through hole, one end of the screw rod being connected with the abutting block, the abutting block being used to abut against the inner circumferential wall of the pump shell.

[0019] The sealing ring replacement equipment provided by the application has one or more of the following technical effects: the sealing ring replacement equipment can accurately determine the position of the sealing ring by using the camera mechanism, and according to the position information of the sealing ring, the sealing ring can be accurately disassembled and assembled by cooperation of the rotating mechanism, the stop ring disassembling mechanism, the screw disassembling mechanism and the hoisting mechanism. In addition, the position information of the sealing ring is accurately obtained by using the camera mechanism, so that personnel do not need to enter the pump shell, and the contact dose of personnel is reduced. In addition, the stop ring disassembling mechanism, the screw disassembling mechanism and the hoisting mechanism can be operated in the pump shell, which can also reduce the disassembly difficulty of the sealing ring. In addition, the mechanical and graphical positioning method is adopted to realize the mechanical disassembly and assembly of the sealing ring, which is beneficial to improve the disassembly efficiency and assembly quality of the sealing ring.

[0020] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creating labor.

[0022] Figure 1 The structural schematic diagram of the sealing ring replacement equipment and the pump shell provided by some embodiments of the application.

[0023] Figure 2 The exploded schematic diagram of the sealing ring replacement equipment and the pump shell provided by some embodiments of the application.

[0024] Figure 3 The structural schematic diagram of the sealing ring, the screw and the stop ring provided by some embodiments of the application.

[0025] Figure 4 For Figure 3 The local enlarged view of A in FIG.

[0026] Figure 5 The structural schematic diagram of the sealing ring replacement equipment provided by some embodiments of the application Figure 1 .

[0027] Figure 6 The structural schematic diagram of the sealing ring replacement equipment provided by some embodiments of the application Figure 2 .

[0028] Figure 7 is a sectional view along the line B-B in Fig. 1. Figure 6 is a sectional view along the line B-B in Fig. 1.

[0029] Figure 8 is a sectional view along the line B-B in Fig. 1. Figure 3 .

[0030] Figure 9 is a sectional view along the line B-B in Fig. 1.

[0031] Figure 10 is a sectional view along the line B-B in Fig. 1. Figure 9 is a sectional view along the line B-B in Fig. 1.

[0032] Figure 11 is a sectional view along the line B-B in Fig. 1.

[0033] Figure 12 is a sectional view along the line B-B in Fig. 1.

[0034] Figure 13 is a sectional view along the line B-B in Fig. 1. Figure 4 .

[0035] Figure 14 is a sectional view along the line B-B in Fig. 1. Figure 13 is a sectional view along the line B-B in Fig. 1.

[0036] Figure 15 is a sectional view along the line B-B in Fig. 1. Figure 14 is a sectional view along the line B-B in Fig. 1.

[0037] wherein the reference signs in the figures mean: 100, sealing ring replacement device; 11, mounting frame; 111, mounting plate; 1111, guide hole; 1112, operation hole; 112, mounting ring; 1121, avoiding hole; 113, support; 1131, connecting through hole; 114, protective cover; 115, guide plate; 12, fixing mechanism; 121, fixing module; 1211, abutting block; 1212, screw rod; 1213, rotating handle; 13, lifting mechanism; 131, lifting driving piece; 1311, lifting motor; 1312, screw rod lifter; 1313, gear transmission mechanism; 132, lifting frame; 1321, lifting body; 1322, lifting sleeve; 14, rotating mechanism; 141, rotating driving piece; 1411, rotating motor; 1412, connecting shaft; 142, rotating frame; 1421, rotating plate; 1422, annular plate; 1423, guide sleeve; 1424, hoisting sleeve; 15, stop ring dismounting mechanism; 151, stop mounting seat; 152, stop lifting driving piece; 153, stop rotating driving piece; 154, stop connecting shaft; 155, stop dismounting cutter; 156, transmission mechanism; 16, screw dismounting mechanism; 161, screw rotating driving piece; 162, rotating shaft; 17, hoisting mechanism; 171, hoisting rod; 1711, rod body part; 1712, screwing part; 172, locking piece; 18, camera mechanism; 19, screw clamping mechanism; 191, clamping module; 1911, clamping driving piece; 1912, clamping plate; 192, clamping connecting frame; 20, guide rod; 21, foreign matter prevention grabbing piece; 211, grabbing cylinder; 212, grabbing block; 22, foreign matter prevention cover; 221, first avoiding groove; 222, second avoiding groove; 223, grabbing hole; 23, linear sliding rail; 24, lifting ring; 200, sealing ring; 210, screw hole; 2101, second groove; 220, hoisting hole; 300, screw; 310, nut; 311, first groove; 312, tightening hole; 400, stop ring; 500, pump shell; 600, hoisting device. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] In the description of the embodiments of the present application, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0040] In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of the application, it should be understood that the terms "in", "out", "side", "up", "bottom", "front", "back" and the like indicate the orientation or positional relationship only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0044] In the description of the application, it should be noted that the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone.

[0045] It should also be noted that the same reference signs in the embodiments of the present application represent the same component or the same part, and for the same parts in the embodiments of the present application, only one part or component may be marked with reference signs in the drawings, and it should be understood that the reference signs are also applicable to other identical parts or components.

[0046] The reactor coolant pump in service is a key equipment in the reactor cooling system of a nuclear power plant, and is mainly used for driving the circulation of a coolant (such as light water, heavy water, etc.) in the reactor to realize heat transfer and ensure the safe and stable operation of the reactor. The reactor coolant pump in service comprises a pump shell and a hydraulic component. The pump shell has a mounting space, and a lower through hole and an upper through hole in communication with the mounting space are respectively arranged at two ends of the pump shell. The hydraulic component is installed in the mounting space, and the hydraulic component is sealingly installed in the lower through hole through a sealing ring. The sealing ring is fixed to the pump shell by means of a screw, and the screw is provided with a stop ring. The stop ring is used to limit the rotation of the screw and reduce the risk of loosening of the screw. During a long-time operation or in the case that the stop ring, the screw or other components are damaged, the sealing ring needs to be replaced. However, in the actual replacement process, the sealing ring is replaced manually. The inner surface of the pump shell is covered with dense activated products, and the contact dose rate is high. Therefore, the maintenance personnel directly perform the replacement operation in the pump shell, the operation time is limited, the personnel are at high risk of receiving a high dose, and the replacement efficiency is not improved. In addition, the height difference between the upper through hole and the lower through hole of the pump shell is large. The personnel stand at the upper through hole of the pump shell and use a long rod tool to perform remote operation. The personnel are at high risk of receiving a high dose, and the personnel are at risk of falling, and the reliability is poor. The screw is prevented from loosening by means of the stop ring. Before the screw is disassembled, the stop ring needs to be peeled off. After replacement, the new stop ring needs to be locked. However, the stop ring is easily torn during deformation. Therefore, the difficulty of remote operation of the personnel standing at the upper through hole is extremely great.

[0047] Based on this, the sealing ring replacement equipment provided in the embodiments of the present application can realize the mechanized replacement of the sealing ring, is beneficial to reducing the replacement difficulty of the sealing ring, can replace the manual operation with a machine, can reduce the dose received by the personnel, and can improve the replacement efficiency and the replacement quality.

[0048] In some embodiments, the sealing ring replacement equipment can be used in the maintenance process of the reactor coolant pump, and can also be applied to the emergency replacement operation of the sealing ring.

[0049] The sealing ring replacement equipment provided in the embodiments of the present application will be described below. Figures 1-15 The sealing ring replacement equipment provided in the embodiments of the present application will be described below.

[0050] As Figures 1-7As shown in the drawings, in some embodiments, the sealing ring replacement device 100 is suitable for replacing the sealing ring 200 of the reactor coolant pump, and the sealing ring replacement device 100 comprises a mounting frame 11, a fixing mechanism 12, a lifting mechanism 13, a rotating mechanism 14, a stop ring dismounting mechanism 15, a screw dismounting mechanism 16, a hoisting mechanism 17 and a camera mechanism 18, the fixing mechanism 12 is connected to the mounting frame 11, and the fixing mechanism 12 is used for fixedly connecting with the pump shell 500 of the reactor coolant pump; the lifting mechanism 13 comprises a lifting drive 131 and a lifting frame 132, the lifting drive 131 is connected to the mounting frame 11, the lifting drive 131 is connected with the lifting frame 132, and the lifting drive 131 is used for driving the lifting frame 132 to lift; the rotating mechanism 14 comprises a rotating drive 141 and a rotating frame 142, the rotating drive 141 is connected to the lifting frame 132, the rotating drive 141 is connected with the rotating frame 142, and the rotating drive 141 is used for driving the rotating frame 142 to rotate; the stop ring dismounting mechanism 15 is connected to the rotating frame 142, and the stop ring dismounting mechanism 15 is used for dismounting the stop ring 400; the screw dismounting mechanism 16 is connected to the rotating frame 142, and the screw dismounting mechanism 16 is used for dismounting the screw 300; the hoisting mechanism 17 is connected to the rotating frame 142, and the hoisting mechanism 17 is used for connecting with the lifting hole 220 of the sealing ring 200; the camera mechanism 18 is connected to the rotating frame 142, and the camera mechanism 18 is used for acquiring the graphic information of the sealing ring 200, so as to acquire the positioning information of the sealing ring 200; the rotating drive 141 is electrically connected with the camera mechanism 18, and the rotating drive 141 is used for driving the rotating frame 142 to rotate according to the positioning information of the sealing ring 200, so that the stop ring dismounting mechanism 15 can be aligned with the preset stop ring 400, the screw dismounting mechanism 16 can be aligned with the preset screw 300, and the hoisting mechanism 17 can be aligned with the lifting hole 220 of the sealing ring 200.

[0051] For the convenience of description, the drawings of the embodiments of the present application adopt a frame structure to schematically show the pump shell 500. Of course, in the actual product, the pump shell 500 adopts a shell structure.

[0052] The mounting frame 11 can refer to a support main body of the sealing ring replacement device 100, and the fixing mechanism 12, the lifting mechanism 13 and the rotating mechanism 14 are connected to the mounting frame 11, which supports these components and reduces the risk of displacement and shaking of the sealing ring replacement device 100 during the replacement of the sealing ring 200.

[0053] In some examples, the mounting frame 11 comprises a mounting plate 111 and a mounting ring 112, the lifting driving member 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 shell 500 to reduce the falling of foreign matters into the pump shell 500. The lifting driving member 131 is located outside the pump shell 500 to reduce the risk of contact between the lifting driving member 131 and the pump shell 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 equipment 100, thereby facilitating the installation of the sealing ring replacement equipment 100.

[0054] In some examples, the mounting frame 11 is provided with a lifting ring 24 arranged on the mounting plate 111. The lifting ring 24 is used to be connected with hoisting equipment 600, which can be a travelling crane, a gantry crane, etc. The hoisting equipment 600 is used to hoist the sealing ring replacement equipment 100 to the upper part of the pump shell 500, thereby facilitating the sealing ring replacement equipment 100 to enter the pump shell 500 to replace the sealing ring 200.

[0055] The fixing mechanism 12 can refer to a component for fixing the sealing ring replacement equipment 100 to the pump shell 500. The fixing mechanism 12 can be connected by clamping, threaded connection, bonding, etc. For example, the fixing mechanism 12 can be abutted with the inner circumferential wall of the pump body to realize the fixed connection of the sealing ring replacement equipment 100 and the pump shell 500. After the sealing ring replacement equipment 100 is fixed, the lifting mechanism 13, the rotating mechanism 14, the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17 and the camera mechanism 18 can be stably supported, which is beneficial to improve the efficiency and quality of the sealing ring 200 dismounting.

[0056] The lifting mechanism 13 can refer to a component for driving the rotating mechanism 14 to lift. The lifting mechanism 13 comprises a lifting driving member 131 and a lifting frame 132. The lifting driving member 131 can refer to a power component for driving the lifting frame 132 to lift, such as a linear module, a cylinder, a motor, etc. The lifting frame 132 can refer to a component capable of lifting under the driving of the lifting driving member 131. The lifting frame 132 can be used as a mounting base of the rotating mechanism 14. The lifting driving member 131 is connected with the lifting frame 132 to drive the rotating mechanism 14 to lift and drive the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17 and the camera mechanism 18 connected with the rotating mechanism 14 to lift, so that the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17 and the camera mechanism 18 can be moved to the sealing ring 200 at the bottom of the pump shell 500 to facilitate the dismounting of the sealing ring 200.

[0057] In some examples, the lifting driver 131 comprises a lifting motor 1311 and a screw lifting machine 1312, the lifting motor 1311 is installed on the mounting plate 111, the lifting motor 1311 is connected with the screw lifting machine 1312 through a gear transmission mechanism 1313, the screw of the screw lifting machine 1312 is connected with the lifting frame 132, the lifting motor 1311 outputs rotary power, the rotary power is transmitted to the screw lifting machine 1312 through the gear transmission mechanism 1313, so as to drive the screw of the screw lifting machine 1312 to move up and down, thereby realizing the lifting of the lifting frame 132, the number of the screw lifting machine 1312 is two, the two screw lifting machines 1312 are arranged on the opposite sides of the rotating driver 141, so as to improve the lifting stability of the lifting frame 132; in addition, the lifting driver 131 adopts the lifting structure of the lifting motor 1311 and the screw lifting machine 1312, which has large load capacity and is conducive to driving the lifting frame 132 to stably lift, and can also better meet the replacement scene of the heavy sealing ring 200.

[0058] In some examples, the mounting frame 11 further comprises a guide plate 115 connected to the side of the mounting plate 111 away from the lifting driver 131, the guide plate 115 is located in the mounting ring 112, and the lifting frame 132 and the guide plate 115 are connected through the linear slide rail 23, which is conducive to improving the lifting stability of the lifting frame 132.

[0059] The rotating mechanism 14 can refer to a component for driving the rotation of the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the hoisting mechanism 17 and the camera mechanism 18, the rotating mechanism 14 comprises a rotating driver 141 and a rotating frame 142, the rotating driver 141 can refer to a power component for driving the rotation of the rotating frame 142, such as a motor and the like; the rotating frame 142 can refer to a component that can rotate under the driving of the rotating driver 141, the rotating frame 142 can serve as a mounting base of the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the hoisting mechanism 17 and the camera mechanism 18, the rotating driver 141 is connected with the rotating frame 142, so as to drive the rotation of the rotating frame 142 and the components connected with the rotating frame 142, such as the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the hoisting mechanism 17 and the camera mechanism 18, so that the stop ring dismounting mechanism 15 and the screw dismounting mechanism 16 can be aligned with the stop ring 400 and the screw 300 on the sealing ring 200, and the hoisting mechanism 17 and the camera mechanism 18 can be aligned with the hoisting hole 220 of the sealing ring 200, thereby facilitating the dismounting of the sealing ring 200.

[0060] In some cases, a plurality of screws 300 are arranged along the circumference of the sealing ring 200, and the plurality of screws 300 are spaced apart to improve the reliability of the installation of the sealing ring 200. The stop ring dismounting mechanism 15 and the screw dismounting mechanism 16 can dismount different screws 300 and stop rings 400 under the driving of the rotating frame 142. The circumference of the sealing ring 200 is provided with a plurality of lifting holes 220 to provide a plurality of lifting points for the lifting of the sealing ring 200, thereby improving the reliability of the lifting.

[0061] In some examples, the number of screws 300 is 12, and the 12 screws 300 are uniformly and spaced apart along the circumference of the sealing ring 200. After one screw 300 is dismounted by the screw dismounting mechanism 16, the next screw 300 can be dismounted by rotating the rotating frame 142 by a preset angle. Similarly, after one stop ring 400 is dismounted by the stop ring dismounting mechanism 15, the next stop ring 400 can be dismounted by rotating the rotating frame 142 by a preset angle. The number of lifting holes 220 is three, and the three lifting holes 220 are uniformly and spaced apart between the screw holes 210 of adjacent two sealing rings 200.

[0062] In some examples, the rotating drive 141 comprises a rotating motor 1411 and a connecting shaft 1412. The rotating 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 rotating motor 1411 drives the connecting shaft 1412 to rotate, thereby driving the rotating frame 142 to rotate. The lifting frame 132 comprises a lifting body 1321 and a lifting sleeve 1322. The rotating motor 1411 is connected to the lifting body 1321, and the lifting body 1321 is connected to the guide plate 115 through the linear slide rail 23. The lifting sleeve 1322 is sleeved outside 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 through a bearing. The lifting sleeve 1322 can protect the connecting shaft 1412 and improve the stability of the rotation. In addition, the lifting sleeve 1322 and the connecting shaft 1412 cooperate, and the rotating driving point of the rotating frame 142 is located at the lower part of the rotating frame 142, which is conducive to improving the stability of the rotation of the rotating frame 142.

[0063] In some examples, the rotating frame 142 comprises a rotating plate 1421. The rotating plate 1421 is fixedly connected to the connecting shaft 1412. The stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17, and the camera mechanism 18 are connected to the rotating plate 1421. The camera mechanism 18 is arranged on the lower side of the rotating plate 1421 to better obtain the image of the sealing ring 200. The rotating plate 1421 can provide a larger mounting position for the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17, and the camera mechanism 18, which is conducive to the arrangement of the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the lifting mechanism 17, and the camera mechanism 18.

[0064] The stop ring dismounting mechanism 15 can refer to a component for dismounting the stop ring 400, the stop ring 400 being sleeved outside the screw cap 310 of the screw 300, the screw cap 310 being provided with a first groove 311 on the circumferential side, the circumferential wall of the stop ring 400 being recessed to be inserted into the first groove 311, the hole wall of the screw hole 210 of the sealing ring 200 being provided with a second groove 2101, the circumferential wall of the stop ring 400 being protruded to be inserted into the second groove 2101, so that the limiting of the screw 300 is realized.

[0065] During the dismounting of the stop ring 400, the stop ring dismounting mechanism 15 inserts a tool between the stop ring 400 and the first groove 311, and pushes the recessed part of the stop ring 400 out of the first groove 311, and / or inserts a tool between the stop ring 400 and the second groove 2101, and pushes the protruded part of the stop ring 400 out of the second groove 2101, so as to complete the peeling of the stop ring 400, and the limiting function of the stop ring 400 is released, so that the stop ring 400 can be dismounted from the screw cap 310 of the screw 300.

[0066] During the installation of the stop ring 400, the stop ring dismounting mechanism 15 inserts a tool between the stop ring 400 and the hole wall of the screw hole 210, and presses the stop ring 400 to the inside of the stop ring 400, so as to press the stop ring 400 into the first groove 311, and / or inserts a tool between the stop ring 400 and the outer wall surface of the screw cap 310, and presses the stop ring 400 to the outside of the stop ring 400, so as to press the stop ring 400 into the second groove 2101, so as to realize the limiting installation of the stop ring 400.

[0067] The hoisting mechanism 17 can refer to a component for hoisting the sealing ring 200, the hoisting mechanism 17 being screwed with the hoisting hole 220 of the sealing ring 200, so as to realize the fixed connection of the sealing ring 200 and the sealing ring replacing device 100, so as to facilitate the sealing ring 200 to be moved out of or into the pump shell 500 together with the sealing ring replacing device 100, so as to realize the dismounting of the sealing ring 200.

[0068] The camera mechanism 18 can refer to a component for acquiring an image of the sealing ring 200, and the camera mechanism 18 includes a camera, a TV detection device, and the like. After the camera mechanism 18 acquires the image of the sealing ring 200, the positioning information of the sealing ring 200 can be acquired through analysis and calculation. According to the positioning information, the rotation angle of the rotating frame 142 can be calculated and analyzed, so as to control the rotating drive 141 to drive the rotating frame 142 to rotate the corresponding calculated rotation angle, so that the screw dismounting mechanism 16 can be aligned with the preset screw 300, thereby completing the dismounting action of the screw 300. The stop ring dismounting mechanism 15 can be aligned with the preset stop ring 400 to complete the dismounting action of the stop ring 400. The hoisting mechanism 17 can also be aligned with the hoisting hole 220 of the sealing ring 200, thereby completing the connection between the hoisting mechanism 17 and the sealing ring 200.

[0069] In some examples, the sealing ring 200 is provided with a marking structure. By shooting the image of the marking structure, the position information of the screw hole 210 and the hoisting hole 220 of the sealing ring 200 can be determined. In this way, according to the position information of the screw hole 210 and the hoisting hole 220, the rotation angle of the rotating frame 142 can be accurately controlled. The marking structure can be a protrusion, a hole, or the like.

[0070] In some examples, the sealing ring 200 can also be directly based on the hoisting hole 220. By shooting the image of the hoisting hole 220, the position information of the hoisting hole 220 can be calculated. Then, according to the position information of the hoisting hole 220, the position information of the screw hole 210 of the sealing ring 200 can be calculated. In this way, according to the position information of the screw hole 210 and the hoisting hole 220, the rotation angle of the rotating frame 142 can be accurately controlled.

[0071] When the sealing ring 200 needs to be disassembled, the sealing ring replacement device 100 can be hoisted into the pump shell 500 by using the hoisting device 600, and then the fixing mechanism 12 is used to fixedly connect the sealing ring replacement device 100 and the pump shell 500. Then, the lifting mechanism 13 drives the rotating mechanism 14 to descend, and the rotating mechanism 14 drives the stop ring dismounting mechanism 15, the screw dismounting mechanism 16 and the camera mechanism 18 connected therewith to descend. The camera mechanism 18 shoots the image of the sealing ring 200, and the positioning information of the sealing ring 200 is calculated and analyzed according to the image information of the sealing ring 200. According to the positioning information of the sealing ring 200, the rotating mechanism 14 drives the rotating drive 141 to rotate the rotating frame 142, and the rotating frame 142 drives the stop ring dismounting mechanism 15 connected therewith to rotate by a certain angle, so that the stop ring dismounting mechanism 15 is aligned with the preset stop ring 400. Then, the stop ring dismounting mechanism 15 removes the preset stop ring 400 from the screw cap 310 of the screw 300. Similarly, all the stop rings 400 on the sealing ring 200 can be removed in a preset order. In addition, according to the positioning information of the sealing ring 200, the rotating mechanism 14 drives the rotating drive 141 to rotate the rotating frame 142, and the rotating frame 142 drives the screw dismounting mechanism 16 connected therewith to rotate by a certain angle, so that the screw dismounting mechanism 16 is aligned with the preset screw 300. Then, the screw dismounting mechanism 16 unscrews the preset screw 300 from the sealing ring 200. Similarly, all the screws 300 on the sealing ring 200 can be unscrewed in a preset order. After all the stop rings 400 and the screws 300 are dismounted, the rotating mechanism 14 drives the rotating drive 141 to rotate the rotating frame 142 according to the positioning information of the sealing ring 200, so that the lifting mechanism 17 can be connected with the lifting hole 220 of the sealing ring 200. After the lifting mechanism 17 is connected with the sealing ring 200, the lifting drive 131 drives the lifting frame 132 to ascend, so as to completely separate the sealing ring 200 from the pump shell 500. The fixing mechanism 12 is disengaged from the pump shell 500, and then the sealing ring replacement device 100 and the sealing ring 200 are hoisted out of the pump shell 500 by using the hoisting device 600. Thus, the disassembly of the sealing ring 200 is completed.

[0072] When the sealing ring 200 needs to be installed, the screw 300 and the stop ring 400 are loaded into the sealing ring 200, the hoisting mechanism 17 is connected with the sealing ring 200, then the sealing ring replacement device 100 and the sealing ring 200 are hoisted into the pump shell 500 by using the hoisting equipment 600, the fixing mechanism 12 is fixedly connected with the pump shell 500, the fixing connection between the hoisting mechanism 17 and the sealing ring 200 is released, the lifting mechanism 13 drives the rotating mechanism 14 to descend, the rotating mechanism 14 drives the stop ring dismounting mechanism 15, the screw dismounting mechanism 16, the camera mechanism 18 and the sealing ring 200 connected with the rotating mechanism 14 to descend, the camera mechanism 18 shoots the image of the sealing ring 200, the positioning information of the sealing ring 200 is calculated and analyzed according to the image information of the sealing ring 200, the rotating mechanism 14 drives the rotating frame 142 to rotate according to the positioning information of the sealing ring 200, the rotating frame 142 drives the sealing ring 200 connected with the rotating frame 142 to rotate, and after the screw hole 210 of the sealing ring 200 is aligned with the screw hole on the pump shell 500, the hoisting mechanism 17 is separated from the sealing ring 200, and the sealing ring 200 is placed in the pump shell 500; then, the rotating mechanism 14 drives the rotating frame 142 to rotate according to the positioning information of the sealing ring 200, the rotating frame 142 drives the screw dismounting mechanism 16 connected with the rotating frame 142 to rotate by a certain angle, so that the screw dismounting mechanism 16 is aligned with the preset screw 300, the screw dismounting mechanism 16 tightens the preset screw 300, the connection between the sealing ring 200 and the pump shell 500 is realized, and all the screws 300 on the sealing ring 200 can be tightened in a preset order; the rotating mechanism 14 drives the rotating frame 142 to rotate according to the positioning information of the sealing ring 200, the rotating frame 142 drives the stop ring dismounting mechanism 15 connected with the rotating frame 142 to rotate by a certain angle, so that the stop ring dismounting mechanism 15 is aligned with the preset stop ring 400, and then the stop ring dismounting mechanism 15 installs the preset stop ring 400 on the screw nut 310 of the screw 300, and all the stop rings 400 on the sealing ring 200 can be fixed in a preset order; after all the stop rings 400 and the screws 300 are fixed in place, the fixing mechanism 12 is released from the fixing connection with the pump shell 500, the sealing ring replacement device 100 is hoisted out of the pump shell 500 by using the hoisting equipment 600, and the installation of the sealing ring 200 is completed.

[0073] By adopting the technical scheme of the embodiment, the position of the sealing ring 200 can be accurately judged by the camera mechanism 18, and according to the position information of the sealing ring 200, the sealing ring 200 can be accurately disassembled and assembled by cooperation of the rotating mechanism 14, the stop ring disassembling mechanism 15, the screw disassembling mechanism 16 and the hoisting mechanism 17. In addition, the position information of the sealing ring 200 is accurately obtained by the camera mechanism 18, so that personnel do not need to enter the pump shell 500, and the contact dose of personnel is reduced. In addition, the stop ring disassembling mechanism 15, the screw disassembling mechanism 16 and the hoisting mechanism 17 can be operated in the pump shell 500, which can also reduce the disassembly difficulty of the sealing ring 200. In addition, the mechanical and graphical positioning mode is adopted to realize the mechanical disassembly and assembly of the sealing ring 200, which is beneficial to improve the disassembly efficiency and assembly quality of the sealing ring 200.

[0074] In addition, the rotating frame 142 can be driven to ascend and descend by the lifting driving part 131, which is suitable for the sealing ring 200 replacement of the in-service reactor coolant pump with different heights. The rotating frame 142 can be driven to rotate by the rotating driving part 141, which is suitable for the sealing ring 200 replacement of different numbers of screws 300. The universal performance of the sealing ring replacement equipment 100 is good.

[0075] Please refer to Figures 8-10 As shown in the figure, in some embodiments, the stop ring disassembling mechanism 15 comprises a stop mounting seat 151, a stop lifting driving part 152, a stop rotating driving part 153, a stop connecting shaft 154 and a stop disassembling cutter 155. The stop mounting seat 151 is rotationally connected to the rotating frame 142. The stop lifting driving part 152 is connected to the stop mounting seat 151. The stop lifting driving part 152 is connected to one end of the stop connecting shaft 154. The other end of the stop connecting shaft 154 is connected to the stop disassembling cutter 155. The stop lifting driving part 152 is used to drive the stop connecting shaft 154 to ascend and descend along the axis of the stop connecting shaft 154. The stop rotating driving part 153 is connected to the stop mounting seat 151 and is used to drive the stop mounting seat 151 to rotate around the axis of the stop connecting shaft 154.

[0076] The stop mounting seat 151 can be a component for supporting the stop lifting driving part 152. The stop mounting seat 151 can be rotationally mounted on the rotating frame 142. For example, the rotating plate 1421 is provided with a rotating hole. The stop mounting seat 151 can be rotationally mounted in the rotating hole through a bearing or the like. The stop mounting seat 151 can rotate around the axis of the stop connecting shaft 154, thereby driving the stop disassembling cutter 155 to rotate, so as to extrude and deform the recessed parts or protruding parts at different positions of the stop ring 400 in the circumferential direction, and realize the disassembly and assembly of the stop ring 400.

[0077] The stop rotation driving member 153 can refer to a component for driving the stop mounting seat 151 to rotate. The stop rotation driving member 153 can be a motor or the like. The stop rotation driving member 153 can be directly connected to the stop mounting seat 151 or connected to the stop mounting seat 151 through a transmission mechanism 156, such as a gear transmission mechanism, a belt transmission mechanism, a chain transmission mechanism, or the like. When the stop rotation driving member 153 is connected to the stop mounting seat 151 through the transmission mechanism 156, the power transmission path can be changed, and the distribution of the stop ring dismounting mechanism 15 can be more flexible.

[0078] The stop lifting driving member 152 can refer to a component for driving the stop connecting shaft 154 and the stop dismounting cutter 155 to lift. The stop lifting driving member 152 can be a linear module, a pneumatic cylinder, an electric push rod, or the like. The stop lifting driving member 152 can drive the stop connecting shaft 154 and the stop dismounting cutter 155 to descend, so that the stop dismounting cutter 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 extruding the stop deformation, so as to realize the dismounting of the stop ring 400.

[0079] The stop connecting shaft 154 can refer to a component for connecting the stop lifting driving member 152 and the stop dismounting cutter 155. The two ends of the stop connecting shaft 154 are respectively connected to the stop lifting driving member 152 and the stop dismounting cutter 155. The stop dismounting cutter 155 can include one cutter or two cutters. The axial direction of the stop connecting shaft 154 can refer to the Z direction in FIG. 1. Figure 7

[0080] When the stop dismounting cutter 155 includes one cutter, the stop dismounting cutter 155 can remove the stop ring 400 and lock the stop ring 400.

[0081] When the stop dismounting cutter 155 includes two cutters, one cutter is used to remove the stop ring 400, and the other cutter is used to lock the stop ring 400.

[0082] In some examples, the shape of the stop dismounting cutter 155 is matched with the shape of the first groove 311 and the second groove 2101, so as to better extrude the stop ring 400 and reduce the risk of damage to the stop ring 400.

[0083] In some examples, the stop dismounting cutter 155 can have a rod structure, and the lower end of the stop dismounting cutter 155 is a pointed structure, so as to better insert between the nut 310 and the stop ring 400 or between the stop ring 400 and the hole wall of the screw hole 210.

[0084] ​When the rotating frame 142 moves the stop dismounting tool 155 to the position of the stop ring 400, the stop lifting driver 152 can drive the stop connecting shaft 154 and the stop dismounting tool 155 to descend, so that the stop dismounting 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, so as to extrude the stop ring 400 to deform, extrude the stop ring 400 into or out of the first groove 311 or the second groove 2101, then the stop lifting driver 152 can drive the stop connecting shaft 154 and the stop dismounting tool 155 to ascend, after the stop dismounting tool 155 leaves the stop ring 400, the stop rotating driver 153 drives the stop mounting seat 151 to rotate, and then drives the stop dismounting tool 155 to rotate to the next first groove 311 or second groove 2101, so as to extrude the stop ring 400 at the next position to deform, until the locking function of the stop ring 400 is released or realized.

[0085] By adopting the technical scheme of the embodiment, the stop lifting driver 152 independently drives the stop dismounting tool 155 to ascend and descend, which is beneficial to reduce the risk of interference of the screw dismounting mechanism 16 caused by the overall ascending and descending of the rotating frame 142, and the arrangement of the stop rotating driver 153 can drive the stop dismounting tool 155 to rotate to extrude different positions of the stop ring 400, so as to realize the dismounting of the stop ring 400.

[0086] In some embodiments, the screw dismounting mechanism 16 comprises a screw rotating driver 161 and a rotating shaft 162, the screw rotating driver 161 is connected to the rotating frame 142, the screw rotating driver 161 is connected to one end of the rotating shaft 162, and the other end of the rotating shaft 162 is used to be connected to the nut 310 of the screw 300, and the screw rotating driver 161 is used to drive the rotating shaft 162 to rotate around the axis thereof.

[0087] The screw rotating driver 161 can refer to a component for driving the rotating shaft 162 to rotate, so as to tighten or loosen the screw 300, and the screw rotating driver 161 can be a motor or the like.

[0088] The rotating shaft 162 can be used to connect the screw rotating driver 161 and the nut 310 of the screw 300, one end of the rotating shaft 162 is connected to the screw rotating driver 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 matched with the shape of the tightening hole 312, the screw rotating driver 161 drives the rotating shaft 162 to rotate, so as to drive the screw 300 to rotate, thereby realizing the tightening and loosening of the screw 300, and realizing the dismounting of the screw 300.

[0089] In some examples, the screw rotating driver 161 is installed on the upper side of the rotating plate 1421, and the rotating shaft 162 is installed on the lower side of the rotating plate 1421, so as to facilitate the connection of the rotating shaft 162 and the screw nut 310.

[0090] After the rotating frame 142 is rotated to the position, the rotating shaft 162 is aligned with the screwing hole 312 of the screw nut 310, the lifting driver 131 drives the rotating frame 142 to descend, so that the rotating shaft 162 is inserted into the screwing hole 312, and then the screw rotating driver 161 is started to drive the rotating shaft 162 to rotate, so as to loosen or tighten the screw 300, thereby achieving the disassembly and assembly of the screw 300.

[0091] By adopting the technical scheme of the embodiment, the screw disassembly and assembly mechanism 16 adopts the structure of the screw rotating driver 161 and the rotating shaft 162, which is simple in structure and simple in disassembly and assembly operation of the screw 300, and is conducive to improving the disassembly and assembly efficiency of the screw 300.

[0092] Please refer to Figure 11 In some examples, the seal ring replacement device 100 further comprises a screw clamping mechanism 19, the screw clamping mechanism 19 comprises 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 comprises a clamping driver 1911 and two clamping plates 1912, the clamping driver 1911 is connected to the two clamping plates 1912, and the clamping driver 1911 is used to drive the two clamping plates 1912 to approach or move away from each other, so as to clamp or release the screw 300.

[0093] After the screw disassembly and assembly mechanism 16 loosens the screw 300, the screw clamping mechanism 19 can clamp the screw 300, so as to clamp the screw 300 out of the screw hole 210 of the seal ring 200, thereby facilitating the screw 300 of the seal ring 200 to be used for other purposes, for example, for the guide rod 20 to be inserted into the seal ring 200 replacement device to guide the seal ring 200 replacement device to be installed into the pump shell 500.

[0094] The screw clamping mechanism 19 comprises the clamping module 191 and the clamping connecting frame 192, the clamping connecting frame 192 is used to connect the rotating frame 142 and the clamping module 191, and the clamping module 191 is used to clamp the screw 300. The number of the clamping module 191 is one or more, and the plurality of clamping modules 191 are distributed along the circumference of the clamping connecting frame 192, so that a plurality of screws 300 can be clamped at the same time.

[0095] The clamping module 191 comprises a clamping driving member 1911 and two clamping plates 1912. The clamping driving member 1911 is used to drive the two clamping plates 1912 to move close to each other to clamp the screw 300, and is used to drive the two clamping plates 1912 to move away from each other to unclamp the screw 300. The clamping driving member 1911 can be a pneumatic cylinder, for example, a finger pneumatic cylinder.

[0096] 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 is lowered, the screw 300 enters between the two clamping blocks 212, and the clamping driving member 1911 of the clamping module 191 drives the two clamping blocks 212 to move close to each other to clamp the screw 300. Then, the rotating frame 142 is raised, the screw 300 moves out of the screw hole 210 of the sealing ring 200, and the empty screw hole 210 of the sealing ring 200 can be provided for the guide rod 20 to pass through to facilitate the guiding effect for the removal of the sealing ring 200.

[0097] By adopting the technical scheme of the embodiment, the screw clamping mechanism 19 can move the screw 300 out of the screw hole 210 of the sealing ring 200, and the empty screw hole 210 can be provided for the guide rod 20 to pass through to facilitate the guiding effect, so that the use of the sealing ring replacement device 100 is more reliable.

[0098] In some embodiments, the sealing ring replacement device 100 further comprises a plurality of guide rods 20. The plurality of guide rods 20 are spaced apart along the circumference of the sealing ring 200. The guide rod 20 passes through the mounting frame 11 and the rotating frame 142 to be inserted into the screw hole 210 of the sealing ring 200. The plurality of clamping modules 191 are used to correspond to the plurality of guide rods 20 one by one.

[0099] The guide rod 20 is provided in the screw hole 210 of the sealing ring 200 and the screw hole of the pump shell 500, so that the sealing ring 200 moves along the axial direction (see the Z direction in FIG. 15) of the guide rod 20 during the lifting of the sealing ring 200 from the pump shell 500 and the lifting of the sealing ring 200 into the pump shell 500. The movement of the sealing ring 200 can reduce the shaking of the sealing ring 200 and can position the sealing ring 200 and the pump shell 500, which is beneficial to the accurate installation of the sealing ring 200. Figure 7 The number of guide rods 20 is a plurality, and the plurality of guide rods 20 are spaced apart along the circumference of the sealing ring 200. For example, the number of guide rods 20 is three, and the guide rod 20 can be inserted into the screw hole adjacent to the lifting hole 220 to facilitate the positioning information of the lifting hole 220.

[0100] For example, the mounting plate 111 is provided with a guide hole 1111, the rotating frame 142 further comprises an annular plate 1422 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, and the guide rod 20 is inserted into the screw hole 210 of the sealing ring 200 and the screw hole of the pump shell 500 in sequence after passing through the guide hole 1111 and the guide sleeve 1423, 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 shell 500 and reduce the radiation dose of personnel.

[0101] 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 plurality of clamping modules 191 are arranged opposite to the plurality of screw holes 210 of the sealing ring 200 corresponding to the plurality of guide rods 20 one by one, so that the clamping module 191 can remove all the screws 300 in the screw holes 210 of the sealing ring 200 corresponding to the guide rod 20 at one time, which is convenient for subsequent installation of the guide rod 20.

[0102] During the installation of the sealing ring 200, before the sealing ring replacement device 100 enters the pump shell 500, the screws 300 and the stop ring 400 are placed in the screw holes 210 of the sealing ring 200, the sealing ring 200 is left with a plurality of screw holes 210, and the plurality of guide rods 20 are inserted into the plurality of screw holes 210 one by one, the two clamping plates 1912 of each clamping module 191 clamp the screws 300, the lifting drive 131 drives the rotating frame 142 to descend by a certain height, then the plurality of guide rods 20 are pulled out, the lifting drive 131 drives the rotating frame 142 to continue to descend, so that the screws 300 clamped by each clamping module 191 can be placed in the left screw holes 210 one by one, which is convenient for subsequent tightening of the screws 300.

[0103] By adopting the technical scheme of the embodiment, the plurality of clamping modules 191 are arranged one by one corresponding to the plurality of guide rods 20, the screws 300 in the screw holes 210 of the sealing ring 200 corresponding to the guide rod 20 can be removed at one time, in addition, during the installation of the sealing ring 200, the plurality of clamping modules 191 can clamp the plurality of screws 300 corresponding to the guide rod 20 at one time, without subsequent supplement of the screws 300, which is helpful to reduce the difficulty of replacement of the sealing ring 200.

[0104] In some embodiments, the rotating shaft 162 is located between the two clamping plates 1912 of one clamping module 191.

[0105] The number of screw dismounting mechanisms 16 is one, the rotating shaft 162 of the screw dismounting 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 the rotating shaft 162 can be inserted into the screw hole 312 of the screw 300.

[0106] By adopting the technical scheme 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 plates 1912 place the screw 300 into the corresponding screw hole 210, and then the rotating shaft 162 can quickly tighten the screw 300, which is beneficial to improve the installation efficiency of the sealing ring 200.

[0107] Please refer to Figure 12 As shown in the drawings, in some embodiments, the sealing ring replacement device 100 further comprises a foreign matter prevention grabbing piece 21 and a foreign matter prevention cover 22, the foreign matter prevention grabbing piece 21 is connected to the end of the rotating frame 142 away from the lifting mechanism 13, the foreign matter prevention grabbing piece 21 is used to grab the foreign matter prevention cover 22 to cover the opening of the sealing ring 200, the foreign matter prevention cover 22 is used to receive the foreign matter falling into the sealing ring 200, and the foreign matter prevention cover 22 is provided with a first avoiding groove 221 for avoiding the screw 300 and a second avoiding groove 222 for avoiding the lifting hole 220.

[0108] The foreign matter prevention grabbing piece 21 is used to grab the foreign matter prevention cover 22, the foreign matter prevention cover 22 is used to cover the opening of the sealing ring 200 to shield the opening of the sealing ring 200, so as to prevent the foreign matter from entering the pipeline system through the sealing ring 200; the foreign matter prevention cover 22 can be recessed towards the inside of the sealing ring 200 to form a basin-shaped structure, so that the foreign matter prevention cover 22 can accommodate the foreign matter; the periphery of the foreign matter prevention cover 22 is provided with the first avoiding groove 221 for avoiding the screw 300 and the second avoiding groove 222 for avoiding the lifting hole 220, the first avoiding groove 221 exposes the screw 300, which is convenient for dismounting the screw 300, and the second avoiding groove 222 exposes the lifting hole 220, which is convenient for connecting the lifting mechanism 17 and the sealing ring 200.

[0109] The foreign matter can be dust, waste liquid, a screw 300 and the like. For example, the screw 300 taken out of the sealing ring 200 by the screw clamping mechanism 19 can fall into the foreign matter prevention cover 22 for storage.

[0110] The foreign matter prevention grabbing piece 21 is used to place the foreign matter prevention cover 22 at the opening of the sealing ring 200, and can also take out the foreign matter prevention cover 22 from the opening of the sealing ring 200. The foreign matter prevention grabbing piece 21 can be a cylinder, a mechanical hand and the like.

[0111] Before the seal ring 200 is disassembled, the lifting drive 131 drives the rotary frame 142 to descend, and the rotary frame 142 drives the anti-foreign cover 22 and the anti-foreign grabbing member 21 to move downward. After the anti-foreign cover 22 is covered on the opening of the seal ring 200, the anti-foreign grabbing member 21 releases the anti-foreign cover 22, and the anti-foreign cover 22 is covered on the opening of the seal ring 200, so as to facilitate the subsequent disassembly of the screw 300 and the stop ring 400.

[0112] Before the seal ring 200 is installed, the anti-foreign cover 22 is covered on the opening of the seal ring 200. After the seal ring 200 is installed, the anti-foreign cover 22 is grabbed by the anti-foreign grabbing member 21, and finally the anti-foreign cover 22 is removed from the pump shell 500 with the seal ring replacement device 100.

[0113] By adopting the technical scheme of the embodiment, the cooperation of the anti-foreign cover 22 and the anti-foreign grabbing member 21 can shield the opening of the seal ring 200, and reduce the risk of foreign matter falling into the pipeline system from the opening of the seal ring 200. In particular, the anti-foreign cover 22 can accommodate the screw 300 disassembled from the seal ring 200, so as to facilitate the subsequent installation of the guide rod 20.

[0114] In some embodiments, the anti-foreign cover 22 is provided with a grabbing hole 223, the anti-foreign grabbing member 21 includes a grabbing cylinder 211 and two grabbing blocks 212, the grabbing cylinder 211 is connected to the end of the rotary frame 142 away from the lifting mechanism 13, the grabbing cylinder 211 is connected with the two grabbing blocks 212, the two grabbing blocks 212 can extend into the grabbing hole 223 under the drive of the lifting mechanism 13, and the grabbing cylinder 211 is used to drive the two grabbing blocks 212 to relatively move away or relatively move close, so that the two grabbing blocks 212 can abut against or separate from the hole wall of the grabbing hole 223.

[0115] The foreign matter prevention cover 22 is provided with a grabbing hole 223 for cooperating with the foreign matter prevention grabbing member 21. The foreign matter prevention grabbing member 21 comprises a grabbing cylinder 211 and two grabbing blocks 212. The grabbing cylinder 211 can drive the two grabbing blocks 212 to relatively approach or move away from each other. The grabbing cylinder 211 can be a finger cylinder or the like. Under the driving of the lifting driving member 131, the two grabbing blocks 212 extend into the grabbing hole 223. The grabbing cylinder 211 drives the two grabbing blocks 212 to relatively move away from each other, so that the two grabbing blocks 212 are respectively in abutment with the opposite sides of the hole wall of the grabbing hole 223, thereby realizing the connection of the grabbing cylinder 211 and the foreign matter prevention cover 22. In this way, the foreign matter prevention cover 22 can be moved to or away from the opening of the sealing ring 200 under the driving of the lifting driving member 131. The grabbing cylinder 211 drives the two grabbing blocks 212 to relatively approach each other, so that the distance between the two grabbing blocks 212 is reduced, and the grabbing blocks 212 are separated from the hole wall of the grabbing hole 223, thereby realizing the separation of the foreign matter prevention cover 22 and the foreign matter prevention grabbing member 21, so that the foreign matter prevention cover 22 is covered at the opening of the sealing ring 200.

[0116] By adopting the technical scheme of the embodiment, the foreign matter prevention grabbing member 21 adopts the structure of the grabbing cylinder 211 and the two grabbing blocks 212. The movement and covering operation of the foreign matter prevention cover 22 are simple, and the sealing ring 200 is convenient to disassemble and assemble.

[0117] In some embodiments, the stop ring disassembling mechanism 15 and the screw disassembling mechanism 16 are distributed at an angle a around the rotation axis of the rotating frame 142. Adjacent two screws 300 are distributed at an angle β around the axis of the sealing ring 200, wherein a = M*β, and M is a positive integer.

[0118] The rotation axis of the rotating frame 142 coincides with the axis of the sealing ring 200, and the rotation axis of the rotating frame 142 is parallel to the Z direction. The stop ring disassembling mechanism 15 and the screw disassembling mechanism 16 are distributed along the circumference of the rotation axis of the rotating frame 142. A first auxiliary plane perpendicular to the rotation axis of the rotating frame 142 is provided. The intersection of the rotation axis of the rotating frame 142 and the first auxiliary plane is a first auxiliary point. The intersection of the rotation axis of the rotating shaft 162 and the first auxiliary plane is a second auxiliary point. The intersection of the axis of the stop connecting shaft 154 and the first auxiliary plane is a 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 intersections of the axes of the adjacent two screws 300 and the first auxiliary plane are a fourth auxiliary point and a 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, wherein a = M*β, and M is a positive integer. When the rotating shaft 162 and the screw 300 are relatively arranged, the stop connecting shaft 154 and the other screw 300 are also relatively arranged. In this way, the disassembly of the screw 300 and the disassembly of the stop ring 400 can be performed synchronously, which is conducive to improving the disassembly efficiency of the sealing ring 200.

[0119] For example, a = 30°, β = 30°, M = 1.

[0120] Of course, in other embodiments, the disassembly of the stop ring 400 and the disassembly of the screw 300 can also be performed in steps.

[0121] Please refer to Figure 13 and Figure 14 As shown in the drawings, 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 is arranged through the mounting frame 11 and the rotating frame 142. The threaded portion 1712 is screwed 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 away from the threaded portion 1712. The locking member 172 is used to lock the mounting frame 11 and the rod body portion 1711.

[0122] The hoisting rod 171 is a cylindrical rod. The rod body portion 1711 has a cylindrical structure. The outer periphery of the threaded portion 1712 is provided with external threads. The hoisting hole 220 is provided with internal threads. The threaded portion 1712 is screwed into the hoisting hole 220 to achieve the connection between the hoisting rod 171 and the sealing ring 200. The upper part of the rod body portion 1711 is connected to the mounting frame 11 through the locking member 172. In this way, the sealing ring 200 and the sealing ring replacement device 100 are fixedly connected, which facilitates the sealing ring 200 to be loaded into or removed from the pump shell 500 together with the sealing ring replacement device 100. The locking member 172 can be a nut, a latch, or the like.

[0123] For example, a hoisting sleeve 1424 is connected between the annular plate 1422 and the rotating plate 1421. The hoisting rod 171 is sequentially arranged through the guide hole 1111 and the hoisting sleeve 1424 and then screwed into the hoisting hole 220 of the sealing ring 200. In this way, the hoisting rod 171 and the guide rod 20 share one guide hole 1111. The guide sleeve 1423 and the hoisting sleeve 1424 are spaced apart 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. This facilitates the installation of the guide rod 20 and the hoisting rod 171.

[0124] In particular, before the sealing ring 200 is disassembled, the guide rod 20 can be inserted into the hoisting hole 220 of the sealing ring 200 to achieve the positioning of the sealing ring replacement device 100, which facilitates the subsequent disassembly of the screw 300 and the stop ring 400.

[0125] By adopting the technical scheme of this embodiment, the hoisting mechanism 17 adopts the structure of the hoisting rod 171 and the locking member 172. The hoisting structure is simple, and the hoisting operation is simple, which is conducive to improving the disassembly efficiency of the sealing ring 200.

[0126] In some embodiments, the length H of the threaded portion 1712 is greater than the hole depth of the lifting hole 220.

[0127] By adopting the technical solutions of this embodiment, the length H of the threaded portion 1712 is greater than the depth of the lifting hole 220, so that in the process of screwing the threaded portion 1712 into the lifting hole 220, the threaded portion 1712 penetrates through the lifting hole 220, thereby abutting against the pump shell 500, and using the acting force between the threaded portion 1712 and the pump shell 500, the sealing ring 200 is pushed out of the lower through hole of the pump shell 500, realizing the separation of the sealing ring 200 and the pump shell 500, thereby facilitating the subsequent lifting.

[0128] In some embodiments, the locking member 172 is a nut, which is screwed outside the rod body portion 1711, and is used to abut against the surface of the mounting frame 11 away from the threaded portion 1712.

[0129] The nut is directly screwed outside the rod body portion 1711, and abuts against the upper surface of the mounting plate 111, so that the nut will not penetrate through the guide hole 1111, thereby fixing and connecting the sealing ring 200 and the mounting plate 111, facilitating the lifting of the sealing ring 200.

[0130] By adopting the technical solutions of this embodiment, after the threaded portion 1712 is screwed with the lifting hole 220 of the sealing ring 200, the upper nut is tightened, thereby fixing and connecting the sealing ring 200 and the sealing ring replacement equipment 100, and the lifting operation of the sealing ring 200 is simple, which is conducive to improving the disassembly and assembly efficiency of the sealing ring 200.

[0131] Please refer to Figure 15 In some embodiments, the fixing mechanism 12 further includes a plurality of fixing modules 121 connected to the mounting frame 11, and the plurality of fixing modules 121 are arranged at intervals along the circumference of the mounting frame 11, and the fixing module 121 is used to abut against and fix the inner circumferential wall of the pump shell 500.

[0132] The fixing module 121 abuts against the inner circumferential wall of the pump shell 500, thereby realizing the relative fixation of the sealing ring replacement equipment 100 and the pump shell 500, and the plurality of fixing modules 121 are arranged at intervals along the circumference of the mounting frame 11, so that a plurality of abutting points can be formed between the sealing ring replacement equipment 100 and the pump shell 500, which is conducive to improving the stability of the sealing ring replacement equipment 100 fixed to the pump shell 500, and improving the reliability of the disassembly and assembly of the sealing ring 200.

[0133] For example, the fixing module 121 is used to abut against the hole wall of the upper through hole of the pump shell 500, and the number of the fixing module 121 is a plurality, and the plurality of fixing modules 121 are installed on the mounting ring 112 and uniformly and evenly distributed along the circumference of the mounting ring 112.

[0134] By adopting the technical scheme of the embodiment, the fixing mechanism 12 adopts a fixing mode of abutting against the inner circumferential wall of the pump shell 500, without the need to provide an additional fixing structure on the pump shell 500, thereby reducing the risk of damage to the pump shell 500.

[0135] In some embodiments, the fixing module 121 comprises an abutting block 1211 and a screw rod 1212, the mounting frame 11 is provided with a connecting through hole 1131, the screw rod 1212 is screwed into the connecting through hole 1131, one end of the screw rod 1212 is connected with the abutting block 1211, and the abutting block 1211 is used for abutting against the inner circumferential wall of the pump shell 500.

[0136] For example, the mounting ring 112 is provided with an avoiding hole 1121 penetrating through the circumferential wall of the mounting ring 112, the inner side of the mounting ring 112 is provided with a support 113, the connecting through hole 1131 is arranged on the support 113, the connecting through hole 1131 is provided with an internal thread, the screw rod 1212 is provided with an external thread, the screw rod 1212 is arranged in the connecting through hole 1131, and the internal thread and the external thread are engaged, the abutting block 1211 is located between the mounting ring 112 and the support 113 and is arranged opposite to the avoiding hole 1121, and the screw rod 1212 is connected with the abutting block 1211 after penetrating through the connecting through hole 1131, so that the abutting block 1211 can be pushed out of the avoiding hole 1121 by rotating the screw rod 1212, and then abuts against the hole wall of the upper through hole of the pump shell 500. The component for driving the screw rod 1212 to rotate can be a motor or a rotating handle 1213.

[0137] In some embodiments, the screw rod 1212 is rotated by the rotating handle 1213, the mounting plate 111 is provided with an operation hole 1112, the rotating handle 1213 is exposed through the operation hole 1112, so as to facilitate the rotation of the rotating handle 1213, and the inner side of the mounting ring 112 is provided with a protective cover 114, the protective cover 114 is arranged on the support 113 and shields the operation hole 1112, and the protective cover 114 can shield and reduce the radiation dose of personnel.

[0138] By adopting the technical scheme of the embodiment, the fixing module 121 adopts the fixing mode of the abutting block 1211 and the screw rod 1212, which is simple in structure and simple in fixing operation of the fixing module 121, and is conducive to improving the disassembly and assembly efficiency of the sealing ring 200.

[0139] The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, and will not be described herein for the sake of brevity.

[0140] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present 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 seal ring replacement apparatus adapted to replace a seal ring of a reactor coolant pump, characterized by, The sealing ring replacement device comprises: a mounting frame; a fixing mechanism connected to the mounting frame, the fixing mechanism being used for fixed connection with a pump shell of the reactor coolant pump; a lifting mechanism comprising a lifting drive and a lifting frame, the lifting drive being connected to the mounting frame, the lifting drive being connected with the lifting frame, the lifting drive being used for driving the lifting frame to lift; a rotating mechanism comprising a rotating drive and a rotating frame, the rotating drive being connected to the lifting frame, the rotating drive being connected with the rotating frame, the rotating drive being used for driving the rotating frame to rotate; a stop ring dismounting mechanism connected to the rotating frame, the stop ring dismounting mechanism being used for dismounting a stop ring; a screw dismounting mechanism connected to the rotating frame, the screw dismounting mechanism being used for dismounting a screw; a hoisting mechanism connected to the rotating frame, the hoisting mechanism being used for connection with a hoisting hole of the sealing ring; a camera mechanism connected to the rotating frame, the camera mechanism being used for acquiring graphic information of the sealing ring, thereby acquiring positioning information of the sealing ring; the rotating drive is electrically connected with the camera mechanism, the rotating drive being used for driving the rotating frame to rotate according to the positioning information of the sealing ring, so that the stop ring dismounting mechanism can be aligned with a preset stop ring, the screw dismounting mechanism can be aligned with a preset screw, and the hoisting mechanism can be aligned with the hoisting hole of the sealing ring.

2. The seal ring replacement apparatus of claim 1, wherein: The stop ring dismounting mechanism comprises a stop mounting seat, a stop lifting drive, a stop rotating drive, a stop connecting shaft and a stop dismounting cutter, the stop mounting seat being rotationally connected to the rotating frame, the stop lifting drive being connected to the stop mounting seat, one end of the stop connecting shaft being connected with the stop lifting drive, the other end of the stop connecting shaft being connected with the stop dismounting cutter, the stop lifting drive being used for driving the stop connecting shaft to lift along the axial direction of the stop connecting shaft; the stop rotating drive is connected with the stop mounting seat and is used for driving the stop mounting seat to rotate around the axis of the stop connecting shaft.

3. The seal ring replacement apparatus of claim 1, wherein: The screw dismounting mechanism comprises a screw rotating drive and a rotating shaft, the screw rotating drive being connected to the rotating frame, one end of the rotating shaft being connected with the screw rotating drive, the other end of the rotating shaft being used for connection with a screw nut of the screw, the screw rotating drive being used for driving the rotating shaft to rotate around its own axis.

4. The seal ring replacement apparatus of claim 3, wherein: The sealing ring replacement device further comprises a screw clamping mechanism, the screw clamping mechanism comprising at least one clamping module and a clamping connecting frame, the clamping connecting frame being connected to the rotating frame, the clamping module comprising a clamping drive and two clamping plates, the clamping drive being connected with the two clamping plates, the clamping drive being used for driving the two clamping plates to approach or move away from each other, so as to clamp or release the screw.

5. The seal ring replacement apparatus of claim 4, wherein: The sealing ring replacement device further comprises a plurality of guide rods, the plurality of guide rods being spaced apart along the circumference of the sealing ring, the guide rods penetrating through the mounting frame and the rotating frame to be inserted into screw holes of the sealing ring. A plurality of the clamping modules are used to correspond to a plurality of the guide rods.

6. The seal ring replacement apparatus of claim 5, wherein: The rotation axis is located between two of the clamping plates of one of the clamping modules.

7. The seal ring replacement apparatus of claim 4, wherein: The sealing ring replacement device further comprises a foreign matter prevention grabbing member and a foreign matter prevention cover, the foreign matter prevention grabbing member is connected to the end of the rotating frame away from the lifting mechanism, the foreign matter prevention grabbing member is used to grab the foreign matter prevention cover to cover the opening of the sealing ring, the foreign matter prevention cover is used to receive the foreign matter falling into the sealing ring, the foreign matter prevention cover is provided with a first avoiding groove for avoiding the screw and a second avoiding groove for avoiding the lifting hole.

8. The seal ring replacement apparatus of claim 7, wherein: The foreign matter prevention cover is provided with a grabbing hole, the foreign matter prevention grabbing member comprises a grabbing cylinder and two grabbing blocks, the grabbing cylinder is connected to the end of the rotating frame away from the lifting mechanism, the grabbing cylinder is connected with the two grabbing blocks, the two grabbing blocks can extend into the grabbing hole under the driving of the lifting mechanism, and the grabbing cylinder is used to drive the two grabbing blocks to relatively far away or relatively close, so that the two grabbing blocks can abut against or separate from the hole wall of the grabbing hole.

9. The seal ring replacement apparatus of any one of claims 1-8, wherein: The stop ring dismounting mechanism and the screw dismounting mechanism are distributed at an angle α around the rotation axis of the rotating frame, and adjacent two screws are distributed at an angle β around the axis of the sealing ring, wherein a=M*β, and M is a positive integer.

10. The seal ring replacement apparatus of any one of claims 1-8, wherein: The lifting mechanism comprises a lifting rod and a locking member, the lifting rod comprises a rod body part and a screwing part, the screwing part is connected with one end of the rod body part, the rod body part is arranged in the mounting frame and the rotating frame, the screwing part is screwed in the lifting hole of the sealing ring, and the locking member is connected with the end of the rod body part away from the screwing part.

11. The seal ring replacement apparatus of claim 10, wherein: The length of the screwing part is greater than the hole depth of the lifting hole.

12. The seal ring replacement apparatus of claim 10, wherein: The locking member is a nut, the nut is screwed outside the rod body part, and the nut is used to abut against the surface of the mounting frame away from the screwing part.

13. The seal ring replacement apparatus of any one of claims 1-7, wherein: The fixing mechanism further comprises a plurality of fixing modules connected to the mounting frame, the 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 inner circumferential wall of the pump shell.

14. The seal ring replacement apparatus of claim 13, wherein: The fixing module comprises an abutting block and a screw rod, the mounting frame is provided with a connecting through hole, the screw rod is screwed in the connecting through hole, one end of the screw rod is connected with the abutting block, and the abutting block is used to abut against the inner circumferential wall of the pump shell.

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