Connecting flange dismounting and mounting device and connecting flange dismounting and mounting method

Abstract

The invention provides a connecting flange dismounting and mounting device and a connecting flange dismounting and mounting method. The connecting flange dismounting and mounting device comprises a coupling matching base, a coupling dismounting and mounting disc, a supporting assembly and a distance measuring assembly, wherein the coupling dismounting and mounting disc and the coupling matching base are arranged in parallel in a spaced mode, the supporting assembly is connected with the coupling dismounting and mounting disc and the coupling matching base, and the distance measuring assembly is arranged on the coupling matching base. The coupling matching base is used for abutting against the first flange. The coupling disassembling and assembling disc is used for being in butt joint with a second flange parallel to the first flange at an interval and used for driving the second flange to rotate around the axis of the supporting assembly so as to disassemble and assemble the second flange; the supporting assembly is used for applying elastic force to the coupling disassembling and assembling disc, so that the coupling disassembling and assembling disc supports the second flange; the distance measuring assembly is used for measuring the distance of the coupling dismounting disc and measuring the distance of a target rod body in threaded connection with the second flange so as to position the installation position of the second flange. According to the technical scheme, the operation safety is improved, the scalding risk is remarkably reduced, and the measurement efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of flange disassembly and assembly methods, and more specifically, to a flange disassembly and assembly device and a flange disassembly and assembly method. Background Technology

[0002] Currently, the disassembly and assembly of the front flange of the piston rod of the drive mechanism inside the bracket (such as the disassembly and assembly of the front flange of the piston rod of the drive mechanism of the main steam isolation valve in nuclear power plants) is still carried out manually. During the installation process, the installation position of the flange needs to be manually measured with a depth gauge to control the installation accuracy.

[0003] However, the existing manual disassembly and measurement methods have many technical drawbacks, as follows: The operation is difficult and the safety is low: the front flange of the piston rod is heavy (about 62.9 kg), and the operation resistance is large when manually handling, aligning and installing it. This not only results in low work efficiency, but also makes it easy for operators to suffer hand injuries due to accidental slippage of the flange or overload of the hands, which is not safe. Limited working space: Disassembly and assembly operations must be completed inside the support frame, which is usually quite small, greatly limiting the range of motion and flexibility of manual operation, and further increasing the complexity of disassembly and assembly operations. Risk of burns from high temperatures: Disassembly operations are often carried out in high-temperature environments. Operators need to come into close contact with the flange to be disassembled and surrounding high-temperature components. Without effective isolation and protection measures, there is a risk of burns from high-temperature components. Low measurement accuracy and efficiency: The installation position relies on manual measurement with a handheld depth gauge. This method is easily affected by the operator's hand stability, reading error and work experience. Not only is the measurement efficiency low, but it is also easy to produce measurement deviations, which in turn leads to insufficient flange installation accuracy. High labor costs and unstable work results: The overall manual installation process is not convenient to operate, the installation effect is greatly affected by the skill level of the personnel, the stability is insufficient, and multiple people are required to cooperate to complete a single operation, which significantly increases the labor input cost and reduces the overall work efficiency.

[0004] In summary, the existing manual disassembly and measurement methods for the piston rod front flange of the internal drive mechanism are insufficient to meet actual production needs in terms of safety, work efficiency, installation accuracy, and labor cost control. Therefore, a technical solution that can solve the above problems is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a connecting flange disassembly and assembly device and a connecting flange disassembly and assembly method to solve the technical problems of existing connecting flange disassembly and assembly methods that are difficult to meet the requirements of safety, work efficiency, installation accuracy and labor cost.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, a flange disassembly and assembly device is provided, comprising: The system comprises a coupling base, a coupling disassembly plate parallel to and spaced apart from the coupling base, a support assembly connecting the coupling disassembly plate and the coupling base, and a distance measuring assembly mounted on the coupling base. The coupling base is used to mate with a first flange. The coupling disassembly plate is used to mate with a second flange parallel to and spaced apart from the first flange, and the coupling disassembly plate is used to drive the second flange to rotate around the axis of the support assembly. The support assembly is used to apply elastic force to the coupling disassembly plate to support it. The distance measuring assembly is used to measure the distance between the coupling disassembly plate and the coupling base, and to measure the distance between the coupling base and the target rod rotatably connected to the second flange.

[0007] By adopting the above technical solutions: First, through the elastic support of the support component and the supporting action of the coupling assembly / disassembly plate, the second flange can be installed without manual handling or lifting, effectively solving the problem of installation difficulties caused by the large weight of the second flange. This also avoids the risk of hand injury caused by direct contact between the operator and the flange, improving operational safety. Second, by utilizing the drive mechanism of the coupling assembly / disassembly plate rotating around the axis of the support component, close-range operation in confined spaces is eliminated, making it suitable for narrow working environments such as inside the support frame. Especially in high-temperature disassembly scenarios, it reduces the frequency and distance of contact between operators and high-temperature areas, significantly reducing the risk of burns. Third, the ranging component achieves distance measurement through dual distance measurement. The precise positioning of the installation location replaces the traditional manual measurement method, which not only greatly improves the measurement efficiency, but also avoids measurement errors caused by human operation, ensures the installation accuracy of the second flange, and reduces subsequent failures caused by installation deviations. Fourth, the entire device can independently complete the flange disassembly and assembly operations without the need for multiple personnel to cooperate, which simplifies the operation process, reduces the cost of personnel configuration and the difficulty of on-site coordination, and improves the stability and reliability of disassembly and assembly operations through the stable drive and support of the mechanical structure. It effectively makes up for the shortcomings of the existing manual disassembly and assembly schemes and is suitable for the flange disassembly and assembly needs of specific scenarios such as the piston rod front flange of the nuclear power main steam isolation valve drive mechanism.

[0008] In one embodiment, the support assembly includes a sleeve, a support shaft slidably disposed in the sleeve, and an elastic element. The sleeve is disposed on the coupling base, the support shaft is rotatably connected to the coupling mounting / dismounting disc, and the two ends of the elastic element are respectively connected to the sleeve and the support shaft.

[0009] In one embodiment, the sleeve includes a limiting sleeve structure disposed on the coupling base and a guide sleeve structure disposed inside the limiting sleeve structure. The limiting sleeve structure has a limiting groove, and the guide sleeve structure has a guide groove. The support shaft includes a limiting shaft body and a guide shaft body connected to the limiting shaft body. One end of the limiting shaft body away from the guide shaft body is rotatably connected to the coupling assembly / disassembly disc. The end of the limiting shaft body near the guide shaft body is in clearance fit with the limiting groove. The end of the guide shaft body away from the limiting shaft body is in clearance fit with the guide groove. The two ends of the elastic member are respectively connected to the limiting shaft body and the guide sleeve structure.

[0010] In one embodiment, the connecting flange disassembly and assembly device further includes a bearing assembly that rotatably connects the coupling disassembly and assembly disc and the limiting shaft, enabling the coupling disassembly and assembly disc to rotate about the axis of the limiting shaft.

[0011] In one embodiment, the bearing assembly includes a first bearing and a second bearing arranged in parallel and spaced apart. The inner rings of the first bearing and the second bearing are sleeved on the limiting shaft, and the outer rings of the first bearing and the second bearing are connected to the coupling assembly / disassembly disc.

[0012] In one embodiment, the first bearing is located on the side of the second bearing away from the coupling base, and the bearing assembly further includes a bearing cap connected to the first bearing, and the limiting shaft is connected to the bearing cap.

[0013] In one embodiment, the connecting flange disassembly and assembly device further includes a disassembly and assembly lever, and the coupling disassembly and assembly disc is provided with a plurality of disassembly and assembly slots along its circumference. The disassembly and assembly lever is used to insert into the disassembly and assembly slots and drive the coupling disassembly and assembly disc to rotate around the axis of the support assembly.

[0014] In one embodiment, the ranging component includes a slide rail disposed on the coupling base and a rangefinder slidably disposed on the slide rail. The rangefinder is movable along the length direction of the slide rail to a first position to measure a first distance between the coupling base and the target rod. The rangefinder is also movable along the length direction of the slide rail to a second position to measure a second distance between the coupling base and the coupling disassembly / assembly plate.

[0015] In one embodiment, the coupling assembly / disassembly plate is provided with a measuring hole, through which the rangefinder can measure the distance between the target rod and the coupling base.

[0016] Secondly, a method for disassembling and assembling a connecting flange is provided, applied to the aforementioned connecting flange disassembly and assembly device, comprising the following steps: A connecting flange disassembly and assembly device is installed between the first flange and the second flange, wherein the coupling mating base is connected to the first flange, the coupling disassembly and assembly plate is connected to the second flange, and a first distance between the coupling mating base and the target rod body and a second distance between the coupling mating base and the coupling disassembly and assembly plate are detected by a ranging component; Rotate the coupling disassembly plate to drive the second flange to rotate, so that the second flange rotates relative to the target rod body, thereby removing the second flange from the target rod body; The second flange and the connecting flange disassembly and assembly device are installed together between the target rod and the first flange. The coupling disassembly and assembly disc is rotated to install the second flange onto the target rod. The target rod is adjusted so that the distance between the coupling mating base and the target rod detected by the ranging component is equal to the first distance. The coupling disassembly and assembly disc is also adjusted so that the distance between the coupling mating base and the coupling disassembly and assembly disc detected by the ranging component is equal to the second distance.

[0017] By adopting the above technical solutions: First, the pre-disassembly measurement step eliminates blind spots and obtains accurate benchmark distance data through the dual-position measurement of the ranging component and the direct alignment design of the measuring hole, providing a scientific basis for disassembly and assembly operations and avoiding component damage caused by blind operation; Second, the disassembly and installation steps reduce the force intensity by utilizing the leverage of the disassembly and assembly lever, combined with the low-friction rotation characteristics of the bearing assembly, making the rotation and disassembly of the second flange easier and smoother, suitable for the heavier second flange, while reducing the physical burden on operators; Third, real-time monitoring of distance data during installation allows for precise control of the installation position of the second flange, avoiding installation deviations caused by manual estimation and ensuring installation accuracy; Fourth, the entire method and device are highly coordinated, making full use of the elastic support of the support component, the accurate measurement of the ranging component, and the smooth rotation of the bearing assembly, effectively solving the problem of flange disassembly and assembly in confined spaces and high-temperature environments, improving operational safety and efficiency, and adapting to the disassembly and assembly requirements of harsh scenarios such as the piston rod front flange of the nuclear power plant main steam isolation valve drive mechanism. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a connecting flange disassembly and assembly device provided in an embodiment of the present invention, wherein the rangefinder is moved to a first position.

[0020] Figure 2 This is a schematic diagram of the connecting flange disassembly and assembly device provided in an embodiment of the present invention, wherein the rangefinder is moved to the second position.

[0021] Figure 3 This is a partial sectional view of the connecting flange disassembly and assembly device provided in an embodiment of the present invention.

[0022] The labels for the attached figures are as follows: 1. Coupling base; 2. Coupling mounting / dismounting plate; 3. Support assembly; 4. Distance measuring assembly; 5. Bearing assembly; 6. Mounting / dismounting lever; 10. First flange; 20. Second flange; 30. Support; 40. Target rod; 21. Disassembly / assembly slot; 41. Slide rail; 42. Rangefinder; 22. Measuring hole; 31. Sleeve; 32. Support shaft; 33. Elastic element; 51. First bearing; 52. Second bearing; 53. Bearing cap; 311. Limiting sleeve structure; 312. Guide sleeve structure; 321. Limiting shaft; 322. Guide shaft. Detailed Implementation

[0023] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0024] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments: like Figures 1 to 3As shown, an embodiment of the present invention provides a connecting flange disassembly and assembly device for disassembling and assembling a connecting flange in a drive mechanism. The drive mechanism includes a bracket 30, a first flange 10 disposed inside the bracket 30 and opposite to it, and a target rod 40 threadedly connected to the second flange 20. That is, the target rod 40 is threadedly connected to the second flange 20. The connecting flange disassembly and assembly device of this embodiment is used to disassemble the second flange 20 from the target rod 40. The connecting flange disassembly and assembly device includes: The system comprises a coupling base 1, a coupling disassembly / assembly plate 2 spaced parallel to the coupling base 1, a support assembly 3 connecting the coupling disassembly / assembly plate 2 and the coupling base 1, and a distance measuring assembly 4 mounted on the coupling base 1. The coupling base 1 is used to mate with a first flange 10. The coupling disassembly / assembly plate 2 is used to mate with a second flange 20 spaced parallel to the first flange 10, and the coupling disassembly / assembly plate 2 is used to drive the second flange 20 to rotate around the axis of the support assembly 3. The support assembly 3 is used to apply elastic force to the coupling disassembly / assembly plate 2 to support the coupling disassembly / assembly plate 2. The distance measuring assembly 4 is used to measure the distance between the coupling disassembly / assembly plate 2 and the coupling base 1, and to measure the distance between the coupling base 1 and the target rod 40 that is rotatably connected to the second flange 20 by a thread.

[0027] Specifically, a flange disassembly and assembly device comprises a coupling base 1, a coupling disassembly and assembly plate 2, a support assembly 3, and a ranging assembly 4. The coupling disassembly and assembly plate 2 and the coupling base 1 are arranged in a parallel and spaced-apart configuration. The support assembly 3 connects the coupling disassembly and assembly plate 2 and the coupling base 1 to achieve their assembly connection. The ranging assembly 4 is mounted on the coupling base 1. Each component corresponds to a specific functional adaptation structure: the coupling base 1 is used to dock and position the first flange 10 to be disassembled or assembled, providing a stable installation reference and support foundation for the entire device; the coupling disassembly and assembly plate 2 is used to dock with the second flange 20 (i.e., the piston rod front flange of the nuclear power plant main steam isolation valve drive mechanism to be disassembled or assembled) which is arranged in parallel and spaced-apart from the first flange 10, and also has a driving function. During operation, the second flange 20 is driven to rotate around the axis of the support assembly 3. This rotation enables the second flange 20 to be disassembled and assembled with the corresponding target rod 40. As the core support component, the support assembly 3 can apply elastic force to the coupling disassembly and assembly plate 2. The elastic force allows the coupling disassembly and assembly plate 2 to provide stable support for the second flange 20, thereby balancing the self-weight load of the second flange 20 and effectively reducing the risk of installation misalignment caused by the large weight of the flange or reducing the burden of manual support. The distance measuring assembly 4 has dual measurement functions. On the one hand, it can measure the distance of the coupling disassembly and assembly plate 2, and on the other hand, it can measure the distance of the target rod 40 that is threadedly connected to the second flange 20. By acquiring these two sets of measurement data in tandem, the installation position of the second flange 20 is accurately located, ensuring that the installation accuracy meets the operation requirements.

[0028] Its working principle is as follows: When performing flange disassembly and assembly operations, firstly, the coupling base 1 is connected and fixed with the first flange 10 to establish stable support for the entire device; then, the coupling disassembly and assembly plate 2 is connected with the second flange 20 to be disassembled and assembled. At this time, the support component 3 releases its elastic force and acts on the coupling disassembly and assembly plate 2, which transmits the elastic force to the second flange 20, achieving elastic support for the second flange 20 and balancing its own weight; if disassembly is to be performed, by driving the coupling disassembly and assembly plate 2 to rotate around the axis of the support component 3, the second flange 20 is driven to rotate synchronously, so that the second flange 20... The second flange 20 can be disassembled by gradually separating it from the target rod 40 (i.e., the piston rod). If installation is to be performed, first measure the distance between the coupling disassembly plate 2 and the target rod 40 using the ranging component 4. Combine the two sets of measurement data to calculate and determine the precise installation position of the second flange 20. Then drive the coupling disassembly plate 2 to rotate around the axis of the support component 3, causing the second flange 20 to rotate in the direction of threaded connection with the target rod 40 until the second flange 20 reaches the preset installation position and completes the threaded connection and fixation, that is, the second flange 20 is threadedly fixedly connected to the target rod 40.

[0029] By adopting the above technical solutions: First, through the elastic support of the support component 3 and the supporting effect of the coupling assembly / disassembly plate 2, the second flange 20 can be installed without manual handling or lifting, effectively solving the problem of installation difficulties caused by the large weight of the second flange 20. This also avoids the risk of hand injury caused by direct contact between the operator and the flange, improving operational safety. Second, by utilizing the drive mechanism of the coupling assembly / disassembly plate 2 rotating around the axis of the support component 3, close-range operation in confined spaces is eliminated, making it suitable for narrow working environments such as inside the bracket 30. Especially in high-temperature disassembly scenarios, it reduces the frequency and distance of contact between operators and high-temperature areas, significantly reducing the risk of burns. Third, the ranging component 4 uses dual distance measurement... The device achieves precise positioning of the second flange 20, replacing the traditional manual measurement method. This not only significantly improves measurement efficiency but also avoids measurement errors caused by human operation, ensuring the installation accuracy of the second flange 20 and reducing subsequent failures caused by installation deviations. Fourth, the entire device can independently complete flange disassembly and assembly operations without the need for multiple personnel to cooperate, simplifying the operation process, reducing the cost of personnel configuration and on-site coordination difficulties. At the same time, the stable drive and support of the mechanical structure improves the stability and reliability of disassembly and assembly operations, effectively making up for the shortcomings of existing manual disassembly and assembly schemes, and adapting to the flange disassembly and assembly needs of specific scenarios such as the piston rod front flange of the nuclear power main steam isolation valve drive mechanism.

[0030] In one embodiment, the support assembly 3 includes a sleeve 31, a support shaft 32 slidably disposed in the sleeve 31, and an elastic element 33. The sleeve 31 is disposed on the coupling base 1, the support shaft 32 is rotatably connected to the coupling disassembly and assembly disc 2, and the two ends of the elastic element 33 are respectively connected to the sleeve 31 and the support shaft 32.

[0031] Specifically, the support assembly 3, as the core support component of the connecting flange disassembly and assembly device, consists of a sleeve 31, a support shaft 32, and an elastic element 33. The sleeve 31 is fixedly mounted on the coupling base 1. The support shaft 32 is slidably disposed inside the sleeve 31 and can slide back and forth along the axis of the sleeve 31. The end of the support shaft 32 away from the sleeve 31 is rotatably connected to the coupling disassembly and assembly disc 2 to ensure that the coupling disassembly and assembly disc 2 can rotate relative to the axis of the support shaft 32. The elastic element 33 is assembled between the sleeve 31 and the support shaft 32, and both ends of the elastic element 33 are fixedly connected to the inner wall of the sleeve 31 and the end of the support shaft 32, respectively, forming an integrated support structure of the sleeve 31, the elastic element 33, and the support shaft 32.

[0032] Its working principle is as follows: When the connecting flange disassembly and assembly device performs the disassembly and assembly operation of the second flange 20, it first connects and fixes the first flange 10 through the coupling base 1, so that the sleeve 31 remains in a stable position with the coupling base 1. Then, the coupling disassembly and assembly plate 2 is connected to the second flange 20. At this time, the weight of the second flange 20 will be transmitted to the support shaft 32 through the coupling disassembly and assembly plate 2, causing the support shaft 32 to slide inward along the axis of the sleeve 31. During the sliding process, the support shaft 32 will squeeze the elastic element 33, causing the elastic element 33 to undergo elastic deformation and accumulate elastic potential energy. The elastic element 33 then generates a reverse elastic force through deformation. This elastic force travels along the path "sleeve 31 → elastic element 33 → support shaft 32 → coupling disassembly and assembly plate 2". The path is transmitted to the second flange 20, forming a balanced support for the self-weight of the second flange 20; at the same time, since the support shaft 32 and the coupling disassembly plate 2 are rotatably connected, when the coupling disassembly plate 2 drives the second flange 20 to rotate around the axis of the support assembly 3 to achieve disassembly and assembly, the coupling disassembly plate 2 rotates around the axis of the support shaft 32, which not only ensures the smooth execution of the rotation disassembly and assembly action of the second flange 20, but also meets the axial position fine adjustment requirements of the second flange 20 during the disassembly and assembly process through the sliding fit between the sleeve 31 and the support shaft 32.

[0033] By adopting the above technical solution: Firstly, the sliding fit structure of sleeve 31 and support shaft 32 can flexibly adapt to flange disassembly and assembly scenarios with different thicknesses or installation spacings, avoiding the problem of insufficient adaptability of the support structure due to flange size differences. At the same time, the compact design of the sliding structure can effectively save working space and adapt to narrow working environments such as inside the bracket 30. Secondly, the elastic force of elastic element 33 can be adaptively adjusted according to the self-weight of the second flange 20. The flange weight is balanced by elastic deformation, eliminating the need for manual lifting or handling of the flange, greatly reducing the physical burden on operators, and avoiding the risk of hand injury caused by direct contact with the flange. Thirdly, the rotating connection design between the support shaft 32 and the coupling assembly / disassembly plate 2 ensures that there is no movement interference when the second flange 20 rotates around the axis of the support assembly 3 for assembly / disassembly, ensuring the stability and smoothness of the assembly / disassembly action and reducing flange installation deviation caused by movement jamming. Fourthly, the overall structure adopts a split assembly design, and the sleeve 31, support shaft 32, and elastic element 33 can be independently disassembled and assembled, which facilitates later maintenance and component replacement. Moreover, the mechanical structure has strong stability and can adapt to the long-term operation requirements in high-temperature disassembly environments, avoiding support failure caused by environmental factors, and further improving the overall reliability and operational safety of the connecting flange assembly / disassembly device.

[0034] In one embodiment, the sleeve 31 includes a limiting sleeve structure 311 disposed on the coupling base 1 and a guide sleeve structure 312 disposed inside the limiting sleeve structure 311. The limiting sleeve structure 311 is provided with a limiting groove, and the guide sleeve structure 312 is provided with a guide groove. The support shaft 32 includes a limiting shaft body 321 and a guide shaft body 322 connected to the limiting shaft body 321. The end of the limiting shaft body 321 away from the guide shaft body 322 is rotatably connected to the coupling disassembly and assembly disc 2. The end of the limiting shaft body 321 near the guide shaft body 322 is in clearance fit with the limiting groove. The end of the guide shaft body 322 away from the limiting shaft body 321 is in clearance fit with the guide groove. The two ends of the elastic member 33 are respectively connected to the limiting shaft body 321 and the guide sleeve structure 312.

[0035] Specifically: the sleeve 31 includes a limiting sleeve structure 311 and a guide sleeve structure 312. The limiting sleeve structure 311 is located on the coupling base 1, and the guide sleeve structure 312 is located inside the limiting sleeve structure 311. The limiting sleeve structure 311 has a limiting groove, and the guide sleeve structure 312 has a guide groove. The support shaft 32 includes a limiting shaft body 321 and a guide shaft 322. The guide shaft body 322 is fixedly connected to the limiting shaft body 321. The end of the limiting shaft body 321 facing away from the guide shaft body 322 is rotatably connected to the coupling disassembly and assembly disc 2. The limiting shaft body 321 is close to the guide shaft body 322. One end of the shaft 322 extends into the limiting groove of the limiting sleeve structure 311 and maintains a clearance fit with the limiting groove. The end of the guide shaft 322 away from the limiting shaft 321 extends into the guide groove of the guide sleeve structure 312 and maintains a clearance fit with the guide groove. The elastic element 33 is assembled inside the sleeve 31, and its two ends are fixedly connected to the end of the limiting shaft 321 near the guide shaft 322 and the end of the guide sleeve structure 312, respectively. The whole structure forms a hierarchical assembly support structure of "limiting sleeve structure 311, guide sleeve structure 312, elastic element 33, guide shaft 322, and limiting shaft 321".

[0036] Its working principle is as follows: When the connecting flange disassembly and assembly device disassembles and assembles the second flange 20, it first connects and fixes the first flange 10 through the coupling base 1, so that the limiting sleeve structure 311 of the sleeve 31 remains stable with the coupling base 1; then the coupling disassembly and assembly plate 2 connects to the second flange 20, and the weight of the second flange 20 is transmitted to the limiting shaft 321 through the coupling disassembly and assembly plate 2, driving the limiting shaft 321 to slide axially along the limiting groove of the limiting sleeve structure 311. At the same time, the guide shaft 322 connected to the limiting shaft 321 slides axially along the guide groove of the guide sleeve structure 312. During this process, the limiting shaft 321 compresses the elastic element 33, causing the elastic element 33 to undergo elastic deformation and generate a reverse elastic force. This elastic force travels along the path of "guide sleeve structure 312 → elastic element 33 → limiting shaft 321 → coupling disassembly and assembly plate 2". The path is transmitted to the second flange 20, achieving balanced support for the self-weight of the second flange 20; and since the limiting shaft 321 and the limiting groove, and the guide shaft 322 and the guide groove are all clearance fit, it not only ensures the smooth axial sliding of the support shaft 32 as a whole, but also effectively reduces the risk of radial offset or shaking during the sliding of the support shaft 32 through the radial limiting of the limiting shaft 321 by the limiting groove and the radial guidance of the guide shaft 322 by the guide groove; at the same time, the limiting shaft 321 and the coupling disassembly and assembly plate 2 are rotatably connected. When the coupling disassembly and assembly plate 2 drives the second flange 20 to rotate around the axis of the support assembly 3 to complete the disassembly and assembly, the limiting shaft 321 remains stationary, and only the coupling disassembly and assembly plate 2 rotates around the axis of the limiting shaft 321, ensuring that there is no motion interference in the disassembly and assembly action.

[0037] By adopting the above technical solutions: Firstly, the internal nesting design of the limiting sleeve structure 311 and the guide sleeve structure 312, combined with the corresponding fit of the limiting shaft 321 and the guide shaft 322, forms a double radial limiting and guiding structure, which significantly improves the stability of the sliding process of the support shaft 32, effectively reduces the risk of installation deviation of the second flange 20 due to the offset of the support shaft 32, and further ensures the accuracy of flange disassembly and assembly; Secondly, the clearance fit design of the limiting groove and the limiting shaft 321, and the guide groove and the guide shaft 322, not only reduces the sliding friction resistance between the support shaft 32 and the sleeve 31, ensuring that the support shaft 32 slides flexibly with the change of the self-weight of the second flange 20, but also adapts to the dimensional changes caused by the thermal expansion and contraction of components under high-temperature operating conditions, effectively reducing The risks of sliding and jamming caused by thermal expansion and contraction; third, the elastic element 33 is connected to the limiting shaft 321 and the guide sleeve structure 312 at both ends, so that the elastic force of the elastic element 33 directly acts on the limiting shaft 321 of the core force, improving the elastic force transmission efficiency, ensuring the stable balance of the self-weight of the second flange 20, and reducing the burden of manual support; fourth, the split hierarchical structure design of the sleeve 31 and the support shaft 32 facilitates the independent processing, assembly and subsequent maintenance and replacement of each component, and the overall structure is compact, which can effectively adapt to the narrow working space inside the bracket 30, etc. Combined with the dual limiting and guiding function, it further improves the adaptability and reliability of the support component 3 in the disassembly and assembly of the nuclear power main steam isolation valve flange, and ensures the operational safety and stability of the entire device.

[0038] In one embodiment, the connecting flange disassembly and assembly device further includes a bearing assembly 5, which rotatably connects the coupling disassembly and assembly disc 2 and the limiting shaft 321, enabling the coupling disassembly and assembly disc 2 to rotate around the axis of the limiting shaft 321.

[0039] Specifically, the bearing assembly 5 uses a rotating connection to assemble the coupling assembly disc 2 and the limiting shaft 321. The inner ring of the bearing assembly 5 is fixedly connected to the end of the limiting shaft 321 away from the guide shaft 322 (e.g., interference fit or key connection), and the outer ring of the bearing assembly 5 is fixedly connected to the corresponding assembly hole of the coupling assembly disc 2 (e.g., transition fit or welding fixation). Through the relative rotation characteristics of the inner and outer rings, the coupling assembly disc 2 can rotate flexibly around the axis of the limiting shaft 321. Furthermore, the overall structure of the bearing assembly 5 is adapted to the assembly dimensions of the limiting shaft 321 and the coupling assembly disc 2, ensuring the coaxiality and structural stability after the two are connected.

[0040] Its working principle is as follows: When the connecting flange disassembly and assembly device performs the disassembly and assembly operation of the second flange 20, it first connects and fixes the first flange 10 with the base 1 through the coupling. The elastic element 33 of the support component 3 applies elastic force to the coupling disassembly and assembly plate 2 through the support shaft 32 (limiting shaft 321, guide shaft 322) to balance the self-weight of the second flange 20. When it is necessary to drive the second flange 20 to rotate around the axis of the support component 3 to achieve disassembly and assembly, the external driving force (such as manual application or transmission by the auxiliary driving mechanism) acts on the coupling disassembly and assembly plate 2. At this time, because the inner ring of the bearing assembly 5 is fixed with the limiting shaft 321 and the outer ring is fixed with the coupling disassembly and assembly plate 2, the driving force drives the outer ring of the bearing assembly 5 to rotate synchronously with the coupling disassembly and assembly plate 2. The inner ring moves while the outer ring remains stationary with respect to the limiting shaft 321 (the limiting shaft 321 maintains axial support through the cooperation of the guide shaft 322 and the sleeve 31, and the elastic element 33 continuously balances the weight of the flange). Through the relative rotation of the inner and outer rings of the bearing assembly 5, the coupling disassembly disc 2 rotates smoothly around the axis of the limiting shaft 321, thereby driving the second flange 20 to rotate synchronously and complete the threaded connection or unscrewing operation with the target rod 40. At the same time, during the rotation, the bearing assembly 5 can limit the radial displacement of the coupling disassembly disc 2, ensuring that the coupling disassembly disc 2 always rotates coaxially around the axis of the limiting shaft 321, avoiding misalignment of the second flange 20 and the target rod 40 due to radial offset.

[0041] By adopting the above technical solutions: First, the bearing assembly 5, through the relative rotational structure of the inner and outer rings, significantly reduces the rotational frictional resistance between the coupling assembly / disassembly disc 2 and the limiting shaft 321, avoiding rotational jamming caused by direct rigid contact between the two, making the rotational assembly / disassembly of the second flange 20 easier, especially suitable for the heavier second flange 20, reducing the driving force burden on operators and improving assembly / disassembly efficiency; Second, the rotational connection method of the bearing assembly 5 replaces the direct contact between the coupling assembly / disassembly disc 2 and the limiting shaft 321, avoiding wear caused by long-term rotation, extending the service life of the limiting shaft 321 and the coupling assembly / disassembly disc 2, and reducing the impact of wear debris on the working environment, adapting to the requirements of nuclear power plant scenarios for component reliability and cleanliness; Third, the bearing assembly 5 has a radial limiting function, which can ensure the coupling The coaxial rotation of the disassembly and assembly plate 2 around the axis of the limiting shaft 321 avoids radial displacement of the second flange 20 during rotation, ensuring the coaxiality of the second flange 20 and the target rod 40 during disassembly and assembly, reducing installation deviation, and improving installation accuracy. Fourth, the addition of the bearing assembly 5 does not require changing the support structure of the original support assembly 3 and the measurement function of the ranging assembly 4. The rotation function is upgraded only through a compact assembly design, and the overall structure remains compact, which can be adapted to narrow working spaces such as inside the bracket 30. At the same time, the bearing assembly 5 has good high temperature resistance (selecting bearing types suitable for high temperature environments), and can work stably in high temperature disassembly environments, avoiding failure of the rotation function due to high temperature, further improving the adaptability, reliability and operational safety of the connecting flange disassembly and assembly device in the scenario of disassembly and assembly of the nuclear power main steam isolation valve flange.

[0042] In one embodiment, the bearing assembly 5 includes a first bearing 51 and a second bearing 52 arranged in parallel and spaced apart. The inner rings of the first bearing 51 and the second bearing 52 are sleeved on the limiting shaft 321, and the outer rings of the first bearing 51 and the second bearing 52 are connected to the coupling disassembly and assembly disc 2.

[0043] Specifically, the structure consists of a bearing assembly 5 including a first bearing 51 and a second bearing 52. The first bearing 51 and the second bearing 52 are arranged in parallel intervals along the axial direction of the limiting shaft 321. The inner rings of the first bearing 51 and the second bearing 52 are tightly fitted onto the end of the limiting shaft 321 away from the guide shaft 322. The outer rings of the first bearing 51 and the second bearing 52 are fixedly connected to the corresponding assembly holes of the coupling disassembly and assembly plate 2. The spacing between the two bearings is adapted to the thickness and force requirements of the coupling disassembly and assembly plate 2, ensuring that after the overall assembly, the axes of the first bearing 51 and the second bearing 52 are collinear and coincide with the axis of the limiting shaft 321.

[0044] Its working principle is as follows: When the coupling assembly / disassembly disc 2 drives the second flange 20 to rotate around the axis of the limiting shaft 321 under the action of external driving force, the inner rings of the first bearing 51 and the second bearing 52 remain stationary because they are fixed to the limiting shaft 321, while the outer rings rotate synchronously with the coupling assembly / disassembly disc 2. The smooth rotation of the coupling assembly / disassembly disc 2 is achieved through the relative rotation of the inner and outer rings of the two bearings. At the same time, since the two bearings are set in parallel intervals, the self-weight of the second flange 20 and the radial force generated during the rotation can be borne by the first bearing 51 and the second bearing 52. The first bearing 51 is located on the side of the coupling assembly / disassembly disc 2 away from the limiting shaft 321, and mainly bears the radial load near the flange end. The second bearing 52 is located near the connection end of the limiting shaft 321 and the guide shaft 322, and mainly bears the radial load near the support component 3 end. The two work together to limit the radial displacement of the coupling assembly / disassembly disc 2, effectively reducing the risk of tilting or shaking during rotation.

[0045] By adopting the above technical solution: First, the parallel spacing of the first bearing 51 and the second bearing 52 forms a double radial support structure, which significantly improves the overall radial load-bearing capacity compared to a single bearing. It can more stably bear the self-weight of the second flange 20 and the radial force during rotation, especially suitable for flanges with larger weights. This effectively reduces the risk of bearing deformation or failure due to excessive load and extends the service life of the bearing assembly 5. Second, the spacing of the two bearings can effectively suppress the axial movement and radial runout of the coupling assembly / disassembly disc 2, ensuring that it always rotates coaxially around the axis of the limiting shaft 321, ensuring the coaxiality of the second flange 20 and the target rod 40 during assembly / disassembly, and reducing the risk of bearing deformation or failure due to excessive load. The installation error caused by dynamic offset is reduced, and the disassembly and assembly accuracy is improved. Third, the dual bearing structure reduces the friction loss of a single bearing by dispersing the friction contact area. At the same time, in high-temperature operating environments, the two bearings can share the heat transfer, reducing the performance degradation of a single bearing caused by local high temperature, and adapting to the use requirements of high-temperature disassembly scenarios. Fourth, the parallel spacing layout design does not require increasing the radial dimension of the bearing assembly 5. The structural stability can be enhanced by axial spacing alone, maintaining the compactness of the overall device. It is suitable for narrow working spaces such as inside the bracket 30, further improving the reliability and operational safety of the connecting flange disassembly and assembly device in the scenario of disassembly and assembly of the nuclear power main steam isolation valve flange.

[0046] In one embodiment, the first bearing 51 is located on the side of the second bearing 52 away from the coupling base 1, and the bearing assembly 5 also includes a bearing cap 53 connected to the first bearing 51, and the limiting shaft 321 is connected to the bearing cap 53.

[0047] Specifically, its structure consists of a bearing assembly 5 including a first bearing 51 and a second bearing 52. The first bearing 51 is located above the second bearing 52, and the two are arranged parallel to each other along the axial direction of the limiting shaft 321. A bearing cover 53 is also provided, which is connected to the first bearing 51. Specifically, the inner end face of the bearing cover 53 axially abuts against the outer or inner ring of the first bearing 51 to achieve the connection. The limiting shaft 321 is disposed on the bearing cover 53. Specifically, one end of the limiting shaft 321 away from the guide shaft 322 passes through the bearing cover 53 and is connected to the bearing cover. 53 is fixedly connected, or the bearing cover 53 is sleeved on the limiting shaft 321 and locked to the limiting shaft 321 by fasteners, thereby realizing the setting of the limiting shaft 321 on the bearing cover 53; wherein the inner rings of the first bearing 51 and the second bearing 52 are both sleeved on the limiting shaft 321 and form a fixed fit, and the outer rings of the first bearing 51 and the second bearing 52 are both fixedly connected to the corresponding assembly structure of the coupling disassembly and assembly plate 2. The size of the bearing cover 53 is adapted to the installation position of the first bearing 51, ensuring that it axially limits the first bearing 51 while not interfering with the assembly and rotation of the second bearing 52.

[0048] In one embodiment, the connecting flange disassembly and assembly device further includes a disassembly and assembly lever 6. The coupling disassembly and assembly disc 2 is provided with a plurality of disassembly and assembly slots 21 along its circumference. The disassembly and assembly lever 6 is used to insert into the disassembly and assembly slots 21 and drive the coupling disassembly and assembly disc 2 to rotate around the axis of the support assembly 3.

[0049] Specifically, a disassembly lever 6 is further added, and the coupling disassembly plate 2 is evenly spaced with multiple disassembly slots 21 along its circumference. The size of the slot opening of each disassembly slot 21 is adapted to the size of the insertion end of the disassembly lever 6 (ensuring that there is no obvious looseness after the disassembly lever 6 is inserted). The depth of the disassembly slot 21 meets the requirement that the disassembly lever 6 can stably transmit torque after insertion. The multiple disassembly slots 21 are symmetrically or evenly distributed along the circumference of the coupling disassembly plate 2 (e.g., spaced at 30°-60° intervals, with 4-8 slots). The disassembly lever 6 is a long rod in shape, with one end being an insertion part that fits the disassembly slot 21 (e.g., a rectangular or arc-shaped structure that fits the slot wall), and the other end being a gripping part that facilitates gripping and applying force (it can be provided with anti-slip texture or thickened design) to ensure that the operator can apply force stably.

[0050] Its working principle is as follows: After the connecting flange disassembly and assembly device completes the docking of the coupling base 1 with the first flange 10 and the docking of the coupling disassembly and assembly plate 2 with the second flange 20, and the support component 3 balances the weight of the second flange 20 through the elastic element 33, if it is necessary to drive the coupling disassembly and assembly plate 2 to rotate the second flange 20 to achieve disassembly and assembly, the operator inserts the insertion part of the disassembly and assembly lever 6 into any one of the disassembly and assembly slots 21 in the circumference of the coupling disassembly and assembly plate 2, so that the lever and the coupling disassembly and assembly plate 2 form a torque transmission fit; then the operator holds the gripping part of the lever and applies rotational force in the required rotation direction (tightening direction during installation or loosening direction during disassembly). External force is transmitted to the coupling disassembly plate 2 through the disassembly lever 6, causing the coupling disassembly plate 2 to rotate around the axis of the limiting shaft 321 (relying on the relative rotation characteristics of the inner and outer rings of the bearing assembly 5 to ensure smooth rotation without jamming). Then, the coupling disassembly plate 2 drives the second flange 20 to rotate synchronously, realizing the threaded connection installation or unscrewing disassembly of the second flange 20 and the target rod 40. If the working space is limited, making it difficult to apply force at a single angle, the operator can pull the disassembly lever 6 out of the current disassembly slot 21 and insert it into the disassembly slot 21 at other angles in the circumference. By changing the insertion position, the force application angle can be adjusted to adapt to the operating requirements of a narrow working space.

[0051] By adopting the above technical solutions: First, the engagement between the disassembly lever 6 and the disassembly slot 21 utilizes a lever principle, which significantly reduces the force required compared to directly rotating the coupling disassembly disc 2 manually. This is especially suitable for the heavier second flange 20, reducing the physical burden on operators, avoiding hand injuries caused by excessive force, and improving operational convenience. Second, the multiple disassembly slots 21 circumferentially arranged on the coupling disassembly disc 2 can flexibly adapt to different force application angles within the confined working space of the bracket 30. Operators can achieve multi-angle force application by changing the disassembly slots 21 without adjusting their body position, avoiding operational obstruction due to space limitations and improving operational flexibility. Third, operators indirectly drive the coupling disassembly disc 2 through the disassembly lever 6, without directly contacting the second flange 20. This increases the safety of personnel and the high-temperature flange, especially in high-temperature disassembly environments. The full-distance operation significantly reduces the risk of burns and further enhances operational safety. Fourth, the even distribution of multiple disassembly slots 21 allows a single person to change the force application position in stages, or multiple people to apply force in different disassembly slots 21 (such as two people applying force symmetrically), ensuring balanced force on the coupling disassembly plate 2. This effectively reduces the risk of tilting of the coupling disassembly plate 2 or installation deviation of the second flange 20 due to excessive force on one side, ensuring the stability of the disassembly process and the installation accuracy of the second flange 20. Fifth, the structure of the disassembly lever 6 and the disassembly slot 21 is simple, with low manufacturing cost and convenient disassembly and assembly. It does not require major modifications to the original structure of the coupling disassembly plate 2, making it easy to integrate with existing devices. At the same time, the lever can be stored and replaced separately, resulting in low maintenance costs in the later stages. This further enhances the practicality and economy of the connecting flange disassembly device in the scenario of disassembly and assembly of the main steam isolation valve flange in nuclear power plants.

[0052] In one embodiment, the ranging component 4 includes a slide rail 41 disposed on the coupling base 1 and a rangefinder 42 slidably disposed on the slide rail 41. The rangefinder 42 can move along the length direction of the slide rail 41 to a first position to measure a first distance between the coupling base 1 and the target rod 40; the rangefinder 42 can move along the length direction of the slide rail 41 to a second position to measure a second distance between the coupling base 1 and the coupling disassembly plate 2.

[0053] Specifically, in one embodiment of the connecting flange disassembly and assembly device, the ranging assembly 4 comprises a slide rail 41 and a rangefinder 42. The slide rail 41 is fixedly mounted on the coupling base 1, and the length direction of the slide rail 41 is perpendicular to the axial direction of the support assembly 3. The rangefinder 42 is slidably mounted on the slide rail 41. The two are stably connected through a guide fit structure (such as a slider and a groove fit), ensuring that the rangefinder 42 can move smoothly along the length direction of the slide rail 41. The travel of the rangefinder 42 covers two key positions, namely the first position and the second position. The distance measuring device 42 is positioned in two ways: first, a preset measuring position where it is close to the target rod 40, with the measuring end of the distance measuring device 42 aligned with the relative reference point between the target rod 40 and the coupling base 1; and second, a preset measuring position where it is close to the coupling disassembly / assembly plate 2, with the measuring end of the distance measuring device 42 aligned with the relative reference point between the coupling disassembly / assembly plate 2 and the coupling base 1. The distance between the two positions is adapted to the axial dimension range during the disassembly / assembly of the second flange 20. The distance measuring device 42 has the function of accurately measuring distance (such as laser distance measurement or mechanical distance measurement) and can output measurement data in real time.

[0054] Its working principle is as follows: When installing the second flange 20, firstly, the coupling base 1 is connected and fixed to the first flange 10. The target rod 40 (the part threadedly connected to the second flange 20) is in the assembly state. At this time, the operator pushes the rangefinder 42 along the slide rail 41 to the first position, starts the rangefinder 42 to measure the first distance between the coupling base 1 and the target rod 40 (i.e., the reference axial dimension of the target rod 40 relative to the coupling base 1), and records the reference data. Then, the coupling disassembly and assembly plate 2 is connected to the second flange 20, the support assembly 3 balances the weight of the second flange 20, and the operator pushes... The moving distance measuring device 42 moves along the slide rail 41 to the second position and measures the second distance between the coupling base 1 and the coupling disassembly plate 2 (i.e., the real-time axial dimension of the coupling disassembly plate 2 relative to the coupling base 1). By calculating the difference between the first distance and the second distance (or combining the preset installation gap parameters), the actual distance between the second flange 20 and the target rod 40 can be obtained. Based on this, it is determined whether the second flange 20 has reached the preset installation position. If it has not reached the preset installation position, the coupling disassembly plate 2 is driven to drive the second flange 20 to be threadedly connected to the target rod 40. At the same time, the second distance can be measured and the distance calculated repeatedly until the preset installation requirements are met.

[0055] By adopting the above technical solution: Firstly, the rangefinder 42 can be switched between the first and second positions via the slide rail 41, allowing the acquisition of the reference distance between the target rod 40 and the coupling base 1, and the real-time distance between the coupling mounting / dismounting plate 2 and the coupling base 1. The combined calculation of these two sets of data accurately reflects the actual distance between the second flange 20 and the target rod 40, providing a more comprehensive measurement compared to a single position, avoiding measurement errors caused by reference offset, and significantly improving the positioning accuracy of the installation position. Secondly, the design of the rangefinder 42 moving along the slide rail 41 is suitable for the confined working space inside the bracket 30, allowing operators to complete measurements at both positions without adjusting their body posture, reducing operator fatigue. First, it reduces obstruction and improves measurement efficiency, making it particularly suitable for space-constrained nuclear power plant scenarios. Second, by using the coupling and base 1 as a common reference to measure the first and second distances, it can eliminate the cumulative deviation caused by the overall installation error of the device, ensuring the correlation and reliability of the two sets of data, and providing data support for the accurate installation of the second flange 20. Third, the dual-position measurement function does not require the addition of multiple distance measuring components, but can be achieved by moving only a single distance measuring device 42, simplifying the structure of the distance measuring component 4, reducing manufacturing costs, and at the same time, the stable cooperation structure between the slide rail 41 and the distance measuring device 42 can maintain measurement accuracy in high-temperature environments, further improving the practicality and reliability of the connecting flange disassembly and assembly device.

[0056] In one embodiment, the coupling assembly / disassembly plate 2 is provided with a measuring hole 22, through which the rangefinder 42 can measure the distance between the target rod 40 and the coupling base 1.

[0057] Specifically, in one embodiment of the connecting flange disassembly and assembly device, its structural composition, based on the original coupling base 1, coupling disassembly and assembly plate 2, support assembly 3, distance measuring assembly 4 including slide rail 41 and distance measuring device 42, bearing assembly 5, and disassembly lever 6, further includes a measuring hole 22 on the coupling disassembly and assembly plate 2. This measuring hole 22 is axially penetrating the coupling disassembly and assembly plate 2 (i.e., both ends penetrate the end face of the coupling disassembly and assembly plate 2 facing the second flange 20 and the end face facing the coupling base 1, respectively). The diameter of the measuring hole 22 is the same as that of the distance measuring device. The measuring end (such as a laser emitter or detector) of the rangefinder 42 is adapted to ensure that the measuring signal (such as a laser beam) or detection structure emitted by the rangefinder 42 can pass through without obstruction; the opening position of the measuring hole 22 corresponds to the axis position of the target rod 40 (that is, when the coupling disassembly plate 2 is connected to the second flange 20, the axis of the measuring hole 22 is collinear or parallel to the axis of the target rod 40, and when the rangefinder 42 moves along the slide rail 41 to the corresponding position, the measuring end can be aligned with the target rod 40 through the measuring hole 22). At the same time, the number of measuring holes 22 can be set to one (corresponding to the axis of the target rod 40) or multiple (symmetrically distributed along the circumference to adapt to different measuring angles), and the measuring hole 22 is staggered from the disassembly groove 21 of the coupling disassembly plate 2 to avoid mutual interference affecting their respective functions; the rangefinder 42 is still slidably mounted on the slide rail 41 of the coupling base 1, and the orientation of its measuring end is consistent with the axis direction of the measuring hole 22, ensuring that it can be measured through the measuring hole 22 when moved to the corresponding position.

[0058] Its working principle needs to be explained in conjunction with the installation and positioning process of the second flange 20: After the connecting flange disassembly and assembly device completes the docking of the coupling base 1 with the first flange 10 and the docking of the coupling disassembly and assembly plate 2 with the second flange 20, and the support component 3 balances the weight of the second flange 20 through the elastic element 33, if it is necessary to accurately measure the distance between the target rod 40 and the coupling disassembly and assembly plate 2 (or the second flange 20) to locate the installation position, the operator pushes the rangefinder 42 on the slide rail 41, so that it moves along the length of the slide rail 41 to the measurement position corresponding to the measuring hole 22 (this position cooperates with the previous first position and second position). At this time, the measuring end of the rangefinder 42 is aligned with the measuring hole 22 on the coupling disassembly and assembly plate 2, and the measurement signal (such as laser) passes through the measuring hole 22 and acts directly on the target rod. The distance between the rangefinder 42 and the target rod 40 is obtained by using a preset measurement surface (such as the end face of the target rod 40 near the second flange 20). At the same time, by combining the fixed relative position of the rangefinder 42 and the coupling base 1 (which can be determined by the scale of the slide rail 41 or preset parameters) and the relative position of the coupling base 1 and the coupling disassembly plate 2 (i.e., the second distance), the actual distance between the target rod 40 and the coupling disassembly plate 2 (or the second flange 20) can be quickly calculated without the need for indirect conversion through multiple sets of distances. Furthermore, if it is necessary to monitor the distance change in real time during the rotation and disassembly of the second flange 20 around the shaft, the position of the rangefinder 42 can be kept unchanged, and the target rod 40 can be continuously measured only through the measurement hole 22, avoiding the displacement of the measurement end caused by the rotation of the coupling disassembly plate 2.

[0059] The technical advantages of this embodiment are as follows: First, the opening of the measuring hole 22 allows the rangefinder 42 to penetrate the coupling disassembly plate 2 and directly measure the target rod 40, avoiding the structure of the coupling disassembly plate 2 itself from obstructing the measurement path. This solves the problem of blind spots in measurement where the rangefinder 42 cannot be directly aligned with the target rod 40 in a confined working space. It is especially suitable for scenarios where the distance between the second flange 20 and the target rod 40 is small and the coupling disassembly plate 2 obstructs the line of sight, significantly improving the directness and accuracy of the measurement. Second, the direct measurement method through the measuring hole 22 reduces the number of steps required: "rangefinder 42 - coupling base 1 - coupling disassembly plate 2 - target rod 40". The multi-stage indirect conversion reduces the cumulative measurement error, further improving the positioning accuracy of the second flange 20 and adapting to the stringent requirements of flange installation accuracy in nuclear power scenarios. Thirdly, the cooperation between the measuring hole 22 and the rangefinder 42 does not require additional complex turning or avoidance structures; the function upgrade can be achieved simply through the through hole. The structure is simple and does not affect the strength of the coupling disassembly and assembly plate 2 (the staggered disassembly and assembly slot 21 is set to avoid weakening the circumferential force), while not increasing the overall volume of the device and maintaining adaptability to the narrow space inside the bracket 30. Fourthly, during the rotation and disassembly of the second flange 20, the measuring hole 22 can serve as a fixed measuring channel, so that the rangefinder 42 does not need to be adjusted with the rotation of the coupling disassembly and assembly plate 2 to continuously monitor the distance between the target rods 40, improving measurement efficiency and avoiding positional deviations caused by frequent movement of the rangefinder 42, further ensuring the stability and reliability of the disassembly and assembly operation.

[0060] Secondly, a method for disassembling and assembling a connecting flange is provided, applied to the aforementioned connecting flange disassembly and assembly device, comprising the following steps: The connecting flange disassembly and assembly device is installed between the first flange 10 and the second flange 20. The coupling mating base 1 is connected to the first flange 10, and the coupling disassembly and assembly plate 2 is connected to the second flange 20. The first distance between the coupling mating base 1 and the target rod 40 is detected by the ranging component 4, and the second distance between the coupling mating base 1 and the coupling disassembly and assembly plate 2 is detected. Rotate the coupling disassembly plate 2 to drive the second flange 20 to rotate, so that the second flange 20 rotates relative to the target rod 40, so as to remove the second flange 20 from the target rod 40; The second flange 20 and the connecting flange disassembly and assembly device are installed together between the target rod 40 and the first flange 10. The coupling disassembly and assembly plate 2 is rotated to install the second flange 20 on the target rod 40. The target rod 40 is adjusted so that the distance between the detection coupling mating base 1 of the ranging component 4 and the target rod 40 is equal to the first distance. The coupling disassembly and assembly plate 2 is also adjusted so that the distance between the detection coupling mating base 1 of the ranging component 4 and the coupling disassembly and assembly plate 2 is equal to the second distance.

[0061] Specifically, a method for disassembling and assembling a connecting flange is applied to the aforementioned connecting flange disassembly and assembly device, which includes a coupling base 1, a coupling disassembly and assembly plate 2, a support assembly 3 (including a sleeve 31, a support shaft 32, and an elastic element 33), a ranging assembly 4 (including a slide rail 41 and a rangefinder 42, with a measuring hole 22 on the coupling disassembly and assembly plate 2), a bearing assembly 5, and a disassembly and assembly lever 6 (with a disassembly and assembly groove 21 on the coupling disassembly and assembly plate 2). The specific steps of this method and the collaborative working logic and technical effects of each step and the device components are as follows: First, a measurement step is performed before disassembly. During operation, the connecting flange disassembly and assembly device is installed as a whole between the first flange 10 and the second flange 20 to be disassembled and assembled. The coupling base 1 and the first flange 10 are stably connected through a preset docking structure (such as bolt hole alignment and fixing), providing a reference support for the entire device. The coupling disassembly and assembly plate 2 is connected to the second flange 20 through a suitable... The mating structure (such as flange hole alignment) is used to achieve docking. At the same time, the elastic element 33 of the support component 3 applies elastic force to the coupling disassembly and assembly plate 2 through the support shaft 32 to balance the weight of the second flange 20 and prevent it from shifting. Then, the ranging component 4 is activated, and the rangefinder 42 is moved along the slide rail 41 to the corresponding first position. The rangefinder is aligned with the target rod 40 through the measuring hole 22 on the coupling disassembly and assembly plate 2. The first distance between the coupling mating base 1 and the target rod 40 (i.e., the axial dimension of the target rod 40 relative to the reference) is detected and recorded. Then, the rangefinder 42 is moved along the slide rail 41 to the second position, and the second distance between the coupling mating base 1 and the second flange 20 (i.e., the current axial dimension of the second flange 20 relative to the reference) is detected and recorded. The initial relative position of the second flange 20 and the target rod 40 is initially confirmed through the two sets of distance data, providing data reference for subsequent disassembly operations. Next, the second flange 20 is disassembled. During operation, the insertion part of the disassembly lever 6 is inserted into any one of the disassembly slots 21 around the coupling disassembly plate 2. The operator holds the gripping part of the disassembly lever 6 and applies rotational force in the loosening direction. The external force is transmitted to the coupling disassembly plate 2 through the disassembly lever 6. Relying on the relative rotation characteristics of the inner and outer rings of the bearing assembly 5, the coupling disassembly plate 2 rotates smoothly around the axis of the limiting shaft 321 of the support assembly 3, thereby driving the second flange 20 connected to it to rotate synchronously. During this process, the support assembly 3 continuously balances the weight of the second flange 20 through the elastic element 33 to avoid disassembly jamming due to gravity shift during rotation. At the same time, the change of the second distance can be monitored in real time through the ranging component 4 to judge the disassembly progress of the second flange 20 from the target rod 40 until the second flange 20 is completely unscrewed from the target rod 40, completing the disassembly operation.Finally, the second flange 20 is installed. During this process, the second flange 20 is reconnected to the coupling disassembly / assembly plate 2, so that the connecting flange disassembly / assembly device and the second flange 20 are placed together between the target rod 40 and the first flange 10. The coupling, in conjunction with the base 1, maintains a stable connection with the first flange 10. The elastic element 33 of the support component 3 applies elastic force to the coupling disassembly / assembly plate 2 again through the support shaft 32 to support the second flange 20. Then, the disassembly / assembly lever 6 is inserted into the disassembly / assembly slot 21, and a rotational force is applied in the tightening direction, causing the coupling disassembly / assembly plate 2 and the second flange 20 to rotate synchronously around the axis, gradually connecting the second flange 20 to the target rod 40 via thread. During this process, the first distance and the second distance are continuously monitored through the ranging component 4. By calculating the difference between the two distances (combined with the preset installation gap parameters), the actual assembly distance between the second flange 20 and the target rod 40 is accurately determined. When the distance reaches the preset installation requirements, the application of external force is stopped, completing the installation of the second flange 20.

[0062] By adopting the above technical solutions: First, the measurement step before disassembly eliminates blind spots and obtains accurate benchmark distance data through the dual-position measurement of the ranging component 4 and the direct alignment design of the measuring hole 22, providing a scientific basis for disassembly and assembly operations and avoiding component damage caused by blind operation; Second, the disassembly and installation steps reduce the force intensity by leveraging the disassembly and installation lever 6, combined with the low-friction rotation characteristics of the bearing component 5, making the rotation and disassembly of the second flange 20 easier and smoother, adapting to the heavier second flange 20, while reducing the physical burden on operators; Third, real-time monitoring of distance data during installation allows for precise control of the installation position of the second flange 20, avoiding installation deviations caused by manual estimation and ensuring installation accuracy; Fourth, the entire method and device are highly coordinated, making full use of the elastic support of the support component 3, the precise measurement of the ranging component 4, and the smooth rotation of the bearing component 5, effectively solving the problem of flange disassembly and assembly in confined spaces and high-temperature environments, improving operational safety and efficiency, and adapting to the disassembly and assembly requirements of harsh scenarios such as the piston rod front flange of the nuclear power plant main steam isolation valve drive mechanism.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flange disassembly and assembly device, characterized in that, include: The system comprises a coupling base, a coupling disassembly plate parallel to and spaced apart from the coupling base, a support assembly connecting the coupling disassembly plate and the coupling base, and a distance measuring assembly mounted on the coupling base. The coupling base is used to mate with a first flange. The coupling disassembly plate is used to mate with a second flange parallel to and spaced apart from the first flange, and the coupling disassembly plate is used to drive the second flange to rotate around the axis of the support assembly. The support assembly is used to apply elastic force to the coupling disassembly plate to support it. The distance measuring assembly is used to measure the distance between the coupling disassembly plate and the coupling base, and to measure the distance between the coupling base and the target rod body threadedly connected to the second flange.

2. The connecting flange disassembly and assembly device as described in claim 1, characterized in that, The support assembly includes a sleeve, a support shaft slidably disposed in the sleeve, and an elastic element. The sleeve is disposed on the coupling base, the support shaft is rotatably connected to the coupling assembly / disassembly plate, and the two ends of the elastic element are respectively connected to the sleeve and the support shaft.

3. The connecting flange disassembly and assembly device as described in claim 2, characterized in that, The sleeve includes a limiting sleeve structure disposed on the coupling base and a guide sleeve structure disposed inside the limiting sleeve structure. The limiting sleeve structure has a limiting groove, and the guide sleeve structure has a guide groove. The support shaft includes a limiting shaft body and a guide shaft body connected to the limiting shaft body. The end of the limiting shaft body away from the guide shaft body is rotatably connected to the coupling assembly / disassembly disc. The end of the limiting shaft body near the guide shaft body is in clearance fit with the limiting groove. The end of the guide shaft body away from the limiting shaft body is in clearance fit with the guide groove. The two ends of the elastic element are respectively connected to the limiting shaft body and the guide sleeve structure.

4. The connecting flange disassembly and assembly device as described in claim 3, characterized in that, The connecting flange disassembly and assembly device also includes a bearing assembly, which rotatably connects the coupling disassembly and assembly disc and the limiting shaft, enabling the coupling disassembly and assembly disc to rotate around the axis of the limiting shaft.

5. The connecting flange disassembly and assembly device as described in claim 4, characterized in that, The bearing assembly includes a first bearing and a second bearing arranged in parallel and spaced apart. The inner rings of the first bearing and the second bearing are sleeved on the limiting shaft, and the outer rings of the first bearing and the second bearing are connected to the coupling assembly / disassembly plate.

6. The connecting flange disassembly and assembly device as described in claim 5, characterized in that, The first bearing is located on the side of the second bearing away from the coupling base, and the bearing assembly also includes a bearing cap connected to the first bearing, and the limiting shaft is connected to the bearing cap.

7. The connecting flange disassembly and assembly device as described in any one of claims 1 to 6, characterized in that, The connecting flange disassembly and assembly device also includes a disassembly and assembly lever. The coupling disassembly and assembly disc has multiple disassembly and assembly slots along its circumference. The disassembly and assembly lever is used to insert into the disassembly and assembly slots and drive the coupling disassembly and assembly disc to rotate around the axis of the support assembly.

8. The connecting flange disassembly and assembly device according to any one of claims 1 to 6, characterized in that, The ranging component includes a slide rail disposed on the coupling base and a rangefinder slidably disposed on the slide rail. The rangefinder can move along the length direction of the slide rail to a first position to measure a first distance between the coupling base and the target rod. The rangefinder can also move along the length direction of the slide rail to a second position to measure a second distance between the coupling base and the coupling disassembly / assembly plate.

9. The connecting flange disassembly and assembly device as described in claim 8, characterized in that, The coupling assembly / disassembly plate is provided with a measuring hole, through which the rangefinder can measure the distance between the target rod and the coupling base.

10. A method for disassembling and assembling a connecting flange, applied to the connecting flange disassembly and assembly device according to any one of claims 1 to 9, characterized in that, Includes the following steps: A connecting flange disassembly and assembly device is installed between the first flange and the second flange, wherein the coupling mating base is connected to the first flange, the coupling disassembly and assembly plate is connected to the second flange, and a first distance between the coupling mating base and the target rod body and a second distance between the coupling mating base and the coupling disassembly and assembly plate are detected by a ranging component; Rotate the coupling disassembly plate to drive the second flange to rotate, so that the second flange rotates relative to the target rod body, thereby removing the second flange from the target rod body; The second flange and the connecting flange disassembly and assembly device are installed together between the target rod and the first flange. The coupling disassembly and assembly disc is rotated to install the second flange onto the target rod. The target rod is adjusted so that the distance between the coupling mating base and the target rod detected by the ranging component is equal to the first distance. The coupling disassembly and assembly disc is also adjusted so that the distance between the coupling mating base and the coupling disassembly and assembly disc detected by the ranging component is equal to the second distance.

Images