Nuclear power steam generator plug conveying mechanism

Abstract

The utility model relates to a plug conveying mechanism of a nuclear power steam generator, which enables plugs to be automatically and continuously conveyed to designated positions by arranging a plug conveying mechanism capable of continuously conveying, avoids frequent manual feeding process in traditional pipe plugging operation, and improves production efficiency. And in other words, it is not needed to manually feed the plug to the pipe plugging equipment again after plugging is conducted on the single plugging position on the evaporator, and the continuity and efficiency of pipe plugging operation are greatly improved. In the automatic plug conveying and feeding process, direct participation of operators is reduced, the risk of manual operation under extreme conditions is reduced, and the safety of the whole pipe plugging operation is enhanced. And secondly, the precision of pipe plugging is improved, and the adaptability and the flexibility of the plug conveying mechanism are enhanced.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power facilities, in particular to a plug conveying mechanism for a nuclear power steam generator. Background Art

[0002] As a key device connecting the nuclear reactor and the conventional island, the steam generator plays a crucial role. One of its core components, the heat transfer tube, directly undertakes the task of transferring the heat generated by the nuclear reactor to the secondary side water to generate steam. However, during operation, the heat transfer tube needs to withstand the influence of extreme conditions for a long time, such as high temperature, high pressure, and strong radiation fields. Under the combined action of these factors, the aging process of the material will be accelerated, resulting in the thinning and even rupture of the tube wall. In severe cases, coolant leakage will occur, increasing the risk.

[0003] In recent years, with the progress of automation technology and remote operation systems, automatic plugging tools or automatic plugging robots have emerged, which can perform plugging operations without human intervention, significantly improving the operation efficiency and safety. However, the existing plugging tools or plugging robots cannot perform continuous plugging. Each time, a unit quantity of plugs needs to be manually loaded before plugging, seriously affecting the continuity of the plugging operation and resulting in low plugging operation efficiency. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a plug conveying mechanism for a nuclear power steam generator, which can solve the problem of low plugging operation efficiency.

[0005] The utility model provides a plug conveying mechanism for a nuclear power steam generator, which comprises a connecting device, a conveying device, and a feeding device;

[0006] The conveying device comprises a conveying pipe, a conveying piston, and a conveying air joint. The conveying pipe is arranged on the connecting device. A number of plugs are sequentially placed in the conveying pipe. The conveying piston is slidably arranged in the conveying pipe. The conveying air joint is communicated with the conveying pipe, and the conveying air joint is for gas to be input into the conveying pipe, so that the conveying piston pushes each plug to move along the conveying pipe to the feeding device;

[0007] The feeding device comprises a feeding driving component and a self-tightening clamping component. The feeding driving component drives the self-tightening clamping component to move relative to the connecting device between the feeding position and the feeding position. When the self-tightening clamping component is at the feeding position, the plugs discharged from the conveying pipe can enter and be clamped by the self-tightening clamping component, so that the self-tightening clamping component can drive the plugs to move to the feeding position.

[0008] Preferably, the self-tightening clamping assembly includes a blocking member, a clamping jaw and a clamping driving member. The clamping jaw is movably arranged on the blocking member. The feeding driving assembly is respectively drivingly connected to the blocking member and the clamping jaw. The feeding driving assembly drives the blocking member to drive the clamping jaw to move. The clamping driving member is arranged between the blocking member and the clamping jaw, and is used to provide relative movement between the blocking member and the clamping jaw to clamp the plug.

[0009] Preferably, the clamping driving member includes a clamping reset elastic member 3251 and a top block 3252;

[0010] The top block 3252 is slidably arranged on the blocking member. The clamping reset elastic member 3251 is arranged on the blocking member. The clamping reset elastic member 3251 is drivingly connected to the top block 3252. The top block 3252 is driven by the clamping reset elastic member 3251 to abut against the clamping jaw. The clamping reset elastic member 3251 provides a force to drive the clamping jaw to rotate through the top block 3252, so that the clamping jaw and the blocking member jointly clamp the plug.

[0011] Preferably, the blocking member and the clamping jaw jointly enclose a storage cavity and a feeding port. The inner wall contour of the storage cavity is adapted to the surface contour of a single plug. The feeding port communicates with the storage cavity, and the feeding port allows the plug to enter the storage cavity.

[0012] Preferably, a relief groove is formed in the blocking member, and the relief groove communicates with the storage cavity;

[0013] and / or

[0014] The self-tightening clamping assembly further includes a limiting member. The limiting member, the blocking member and the clamping jaw jointly enclose the storage cavity. The limiting member is arranged opposite to the feeding port and is used to abut against the plug. The limiting member is arranged on the blocking member or the clamping jaw.

[0015] Preferably, the feeding driving assembly includes a seat body and a moving driving member. The seat body is connected to the connecting device. The moving driving member is arranged on the seat body. The moving driving member is drivingly connected to the blocking member and the clamping jaw;

[0016] Wherein, the moving driving member drives the blocking member to move, so that the blocking member drives the clamping jaw to move.

[0017] Preferably, the moving driving member includes a driving cavity, a driving air joint, a driving rod and a moving reset elastic member. The driving cavity is formed in the seat body. The driving air joint is arranged on the seat body. The driving air joint communicates with the driving cavity. The driving rod is slidably arranged in the driving cavity. The driving rod is drivingly connected to the blocking member. One end of the moving reset elastic member is connected to the seat body, and the other end of the moving reset elastic member is connected to the clamping jaw;

[0018] The driving air joint allows gas to be introduced into the driving cavity, so as to drive the driving rod to move along the driving cavity, and further drive the driving rod to drive the self-tightening clamping assembly to move. The moving reset elastic member provides a force to drive the self-tightening clamping assembly to move in a direction close to the seat body.

[0019] Preferably, a limiting rod is arranged in the driving cavity, a limiting through hole is formed in the driving rod, and the limiting rod passes through the limiting through hole.

[0020] Preferably, the conveying device further includes a sealing ring and a retaining ring. The sealing ring is adapted to the inner wall surface of the conveying pipe. Both the sealing ring and the retaining ring are sleeved on the conveying piston, and the outer diameter of the retaining ring is adapted to the inner diameter of the conveying pipe; and / or

[0021] The conveying piston includes a tail section part, an intermediate part and a front stop block which are connected in sequence. The central axes of the tail section part, the intermediate part and the front stop block coincide with each other in the length extension direction. The tail section part is used to drive the intermediate part to move together after the gas is input through the conveying gas joint, so that the front stop block pushes the plug in the conveying pipe to move.

[0022] Preferably, a through hole is formed in the connecting device. The end of the conveying pipe far from the conveying gas joint is screwed to the connecting device, and the conveying pipe is aligned with the through hole, and the through hole is for the plug to pass through.

[0023] Implementing the present invention has the following beneficial effects:

[0024] The present invention relates to a plug conveying mechanism for a nuclear power steam generator. By setting up a continuous plug conveying mechanism, the plug can be automatically and continuously conveyed to a specified position, avoiding the frequent manual feeding process in traditional plugging operations, that is, there is no need to manually reload the plug to the plugging device after plugging a single plugging position on the evaporator, greatly improving the continuity and efficiency of the plugging operation. The automated plug conveying and feeding process reduces the direct participation of operators, reduces the risk of manual operation under extreme conditions, and enhances the safety of the entire plugging operation.

[0025] Secondly, the setting of the self-tightening clamping assembly ensures the stable positioning of the plug during the conveying process, can accurately control the position of the plug at the feeding position, facilitates subsequent connection operations, and improves the accuracy of plugging. The setting of the conveying piston and the conveying gas joint enables the present invention to adapt to plugs of different specifications by adjusting the gas pressure, enhancing the adaptability and flexibility of the plug conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0027] Figure 1 is a schematic structural diagram of the plug conveying mechanism of the nuclear power steam generator in some use states in some embodiments of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the plug conveying mechanism of a nuclear power steam generator in some other usage states in some embodiments of the present utility model;

[0029] Figure 3 It is viewed from another angle Figure 2 A schematic structural diagram of the plug conveying mechanism of the nuclear power steam generator shown;

[0030] Figure 4 It is a partial schematic structural diagram of the plug conveying mechanism of a nuclear power steam generator in some embodiments of the present utility model;

[0031] Figure 5 It is an exploded view of the plug conveying mechanism of a nuclear power steam generator in some embodiments of the present utility model;

[0032] Figure 6 It is an exploded view of the plug conveying mechanism of a nuclear power steam generator in some other embodiments of the present utility model;

[0033] Figure 7 It is Figure 6 An enlarged view at A. Specific embodiments

[0034] The embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0035] It should be understood that although the terms "first", "second", "third", etc. may be used in the present utility model to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0037] Unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Figures 1 to 4 The plug conveying mechanism 10 of a nuclear power steam generator in some embodiments of the present utility model is shown. The plug conveying mechanism 10 of the nuclear power steam generator is applied to supply plugs for equipment or robots used for plugging pipes, ensuring the continuity of the pipe plugging operation of the equipment or robots used for plugging pipes and improving the pipe plugging efficiency.

[0039] As Figures 1 to 4 shown, the plug conveying mechanism 10 of the nuclear power steam generator includes a connecting device 1, a conveying device 2 and a feeding device 3. It can be understood that the connecting device 1 is used to connect the conveying device 2 and the feeding device 3, so that the conveying device 2 and the feeding device 3 can be correctly matched in spatial position. On the one hand, the conveying device 2 is used to accommodate the plug 20 (the plug 20 is shown in Figure 5 ), and on the other hand, it is also used to supply the plug 20 to the feeding device 3 correspondingly. The feeding device 3 is used to drive the plug 20 to move along the corresponding trajectory, so that the plug 20 can be accurately moved to the corresponding position for the pipe plugging equipment to pick up the material correspondingly, ensuring the success rate of picking up the plug 20.

[0040] As Figures 1 to 6 shown, the conveying device 2 includes a conveying pipe 21, a conveying piston 22 (the conveying piston 22 is shown in Figure 5 and Figure 6 ) and a conveying air joint 23 (the conveying air joint 23 is shown in Figure 5) The conveying pipe 21 is arranged on the connecting device 1. A number of plugs 20 are sequentially placed in the conveying pipe 21. The conveying piston 22 is slidably arranged in the conveying pipe 21. The conveying air joint 23 is communicated with the conveying pipe 21, and the conveying air joint 23 is for gas to be input into the conveying pipe 21, so that the conveying piston 22 pushes each plug 20 to move along the conveying pipe 21 to the feeding device 3.

[0041] Understandably, the conveying pipe 21 has a tubular hollow structure with both ends open. One end of the conveying pipe 21 is blocked by the conveying air joint 23, and the other end of the conveying pipe 21 is for the plug 20 to be discharged. The conveying air joint 23 is used to correspondingly introduce air into the conveying pipe 21. The conveying piston 22 is adapted to the inner wall surface of the conveying pipe 21.

[0042] It should be noted that the inner diameter of the conveying pipe 21 is configured to be equal to or greater than the size of the plug 20, but the inner diameter of the conveying pipe 21 is configured to be less than the size of two plugs 20, so that the plugs 20 can be stacked one by one along the length extension direction of the conveying pipe 21. The conveying air joint 23 is used to connect the air pipe, and gas can be correspondingly input into the conveying pipe 21 through the conveying air joint 23, so as to increase the pressure in the space between the conveying air joint 23 and the conveying piston 22 in the conveying pipe 21, and then the conveying piston 22 can move along the length extension direction of the conveying pipe 21.

[0043] During the movement of the conveying piston 22, it will push the plug 20 in the conveying pipe 21 to move, so that the plug 20 can pass through the end of the conveying pipe 21 and enter the feeding device 3. Subsequently, the feeding device 3 clamps and fixes the plug 20 and correspondingly conveys the plug 20 to a predetermined position, so that the plug 20 can move to a position where subsequent pipe blocking equipment can operate after exiting the conveying pipe 21.

[0044] It should also be noted that before or when the feeding device 3 drives the plug 20 located thereon to move, the supply of gas to the conveying air joint 23 is stopped or correspondingly reduced to prevent the plug 20 in the conveying pipe 21 from directly falling out along the conveying pipe 21.

[0045] As Figures 1 to 6 shown, the feeding device 3 includes a feeding drive assembly 31 and a self-tightening clamping assembly 32. The feeding drive assembly 31 drives the self-tightening clamping assembly 32 to move relative to the connecting device 1 between the feeding position 4 and the feeding position 5 (the feeding position 4 is as Figure 1 shown, the feeding position 5 is as Figure 2 shown). When the self-tightening clamping assembly 32 is at the feeding position 4, the plug 20 discharged from the conveying pipe 21 can enter and be clamped by the self-tightening clamping assembly 32, so that the self-tightening clamping assembly 32 can drive the plug 20 to move to the feeding position 5.

[0046] It can be understood that the feeding drive assembly 31 is used to provide a force to drive the self-tightening clamping assembly 32 to move between the feeding position 4 and the feeding position 5. The self-tightening clamping assembly 32 is used to receive the plug 20 at the feeding position 4, and the plug 20 is clamped and fixed once it enters the self-tightening clamping assembly 32, and the self-tightening clamping assembly 32 will then drive the plug 20 to move together under the drive of the feeding drive assembly 31. The plug 20 can be accurately moved to the predetermined operation trajectory of the subsequent pipe plugging equipment or machine, that is, it is ensured that the plug 20 can be accurately fed to the subsequent pipe plugging process, that is, the subsequent pipe plugging process can accurately obtain the plug 20 to be used, and the supply accuracy of the plug 20 is guaranteed.

[0047] It should be noted that the self-tightening clamping assembly 32 includes at least two parts that can move relative to each other, and the parts always have a common clamping movement tendency, so that the self-tightening clamping assembly 32 can automatically clamp and fix the plug 20 entering therein, ensuring that the self-tightening clamping assembly 32 can drive the plug 20 to move smoothly to the loading position 5, thereby ensuring the smooth feeding of the plug 20.

[0048] It should also be noted that when the plug 20 is moved to the loading position 5 driven by the self-tightening clamping assembly 32, the end of the plug 20 is in an exposed state, and the end of the plug 20 is offset from the conveying pipe 21. In this way, the exposed end of the plug 20 can be connected to other structures required for pipe plugging. During the connection process, the utility model limits the position of the plug 20 by the self-tightening clamping assembly 32 to ensure the connection accuracy of the plug 20. The connection operation of the plug 20 at the loading position 5 is not performed by the utility model. Therefore, the connection method and the connection structure are not described here.

[0049] In some pipe plugging devices, a rod is inserted into the plug 20 so that the rod and the plug 20 are tightly matched, and then the plug 20 is driven by the rod to escape from the self-tightening clamping assembly 32, and then the plug 20 is driven by the rod to move to a predetermined position. This section only describes some steps of one or several methods of installing the plug 20, and does not mean that the utility model can only be used with this type of plugging device.

[0050] like Figures 3 to 6 As shown, in some embodiments of the nuclear power steam generator plug conveying mechanism 10, the self-tightening clamping assembly 32 includes a blocking member 321, a clamping jaw 322 and a clamping drive member 325, the clamping jaw 322 is movably arranged on the blocking member 321, the feeding drive assembly 31 is respectively driven and connected to the blocking member 321 and the clamping jaw 322, the feeding drive assembly 31 drives the blocking member 321 to drive the clamping jaw 322 to move, the clamping drive member 325 is arranged between the blocking member 321 and the clamping jaw 322, and the clamping drive member 325 is used to provide relative movement between the blocking member 321 and the clamping jaw 322 to clamp the plug 20.

[0051] Understandably, the blocking member 321 and the clamping jaws 322 together form a space for receiving the plug 20 output from the conveying pipe 21. The clamping jaws 322 are movably mounted on the blocking member 321 and can quickly clamp after the plug 20 enters. The clamping drive member 325 is used to drive the relative movement between the clamping jaws 322 and the blocking member 321. When the plug 20 enters between the blocking member 321 and the clamping jaws 322, the clamping drive member 325, through its internal elastic restoring force or other driving mechanisms, urges the clamping jaws 322 to approach the blocking member 321, thereby achieving a tight clamping of the plug 20.

[0052] It should be noted that the relative movement mode between the clamping jaws 322 and the blocking member 321 can be configured as a rotational or sliding connection. When the plug 20 is pushed out from the conveying pipe 21 and enters between the blocking member 321 and the clamping jaws 322, the plug 20 will overcome the acting force of the clamping drive member 325 under the pushing of the conveying device 2 and enter the self-tightening clamping assembly 32. Subsequently, the feeding drive assembly 31 is activated to drive the entire self-tightening clamping assembly 32, together with the clamped plug 20, to move from the feeding position 4 to the feeding position 5, preparing for the subsequent pipe blocking operation.

[0053] As Figures 4 to 6 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, the clamping drive member 325 includes a clamping reset elastic member 3251 and a top block 3252;

[0054] The top block 3252 is slidably disposed on the blocking member 321. The clamping reset elastic member 3251 is disposed on the blocking member 321. The clamping reset elastic member 3251 is drivingly connected to the top block 3252. The top block 3252 is urged by the clamping reset elastic member 3251 to abut against the clamping jaws 322. The clamping reset elastic member 3251 provides a force for driving the clamping jaws 322 to rotate through the top block 3252, so that the clamping jaws 322 and the blocking member 321 jointly clamp the plug 20.

[0055] Understandably, the clamping reset elastic member 3251 is always in a pre-tightened state, providing a continuous elastic force to the top block 3252, thereby ensuring that the top block 3252 can always abut against the clamping jaws 322, so that the clamping jaws 322 are maintained in a preset clamping preparation state.

[0056] It should be noted that when there is no plug 20 entering, the elastic force of the clamping reset elastic member 3251 acts on the top block 3252, so that the top block 3252 exerts an inward pressure on the clamping jaws 322, but there is still an interval where the clamping jaws 322 and the blocking member 321 do not contact each other at least in part, so that the plug 20 can further enter between the clamping jaws 322 and the blocking member 321 through this interval.

[0057] When the plug 20 is pushed into the self-tightening clamping assembly 32 along the conveying pipe 21 under the action of high-pressure air, the plug 20 will push open the clamping jaws 322 and enter smoothly. Due to the continuous elastic force provided by the clamping and reset elastic member 3251, after the plug 20 is completely inserted, the clamping jaws 322 quickly retract under the action of the elastic force, forming a firm clamping of the plug 20. Once the plug 20 is completely clamped, the self-tightening clamping assembly 32, driven by the feeding drive assembly 31, moves the plug 20 to the feeding position 5. During this process, the clamping and reset elastic member 3251 continuously acts to ensure the stable clamping of the plug 20 by the clamping jaws 322. In this way, the transfer reliability of the plug 20 is improved, and the safety and continuity of the pipe plugging operation are enhanced.

[0058] As Figures 1 to 6 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, the blocking member 321 and the clamping jaws 322 jointly enclose to form a receiving cavity 33 and a feeding port 34. The inner wall contour of the receiving cavity 33 is adapted to the surface contour of a single plug 20. The feeding port 34 communicates with the receiving cavity 33, and the feeding port 34 allows the plug 20 to enter the receiving cavity 33.

[0059] It can be understood that the inner wall contour of the receiving cavity 33 is configured to match the surface contour of a single plug 20, so that when the plug 20 is clamped, good fitting and stability can be provided, reducing shaking or deviation during transportation, and ensuring the precise positioning of the plug 20 when feeding it to the designated position.

[0060] The feeding port 34 is formed by configuring a part of the position of the receiving cavity 33 to be open. The size and shape of the feeding port 34 need to consider the size of the plug 20 to ensure that the plug 20 can pass through smoothly without getting stuck. At the same time, the design of the feeding port 34 also needs to take into account the clamping mechanism of the self-tightening clamping assembly 32 to ensure that when the plug 20 enters, the clamping jaws 322 can quickly respond and clamp the plug 20, and the clamping failure will not be caused by the improper design of the feeding port 34.

[0061] As Figure 3 、 Figure 4 and Figure 6 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, a relief groove 324 is formed on the blocking member 321, and the relief groove 324 communicates with the receiving cavity 33.

[0062] Understandably, some peculiarly shaped plugs or parts of the structure can be accommodated by the avoidance groove 324 of this type of embodiment, avoiding interference with the overall fixation of the plug 20 and preventing damage to the plug 20. Of course, in some embodiments, the provision of the avoidance groove 324 may facilitate the plugging device to pick up the plug. The opening of the avoidance groove 324 can also play a role in weight reduction to a certain extent. The opening position and corresponding functions of the avoidance groove 324 vary depending on the structure and plugging method of the plugging device or plugging robot.

[0063] As Figures 3 to 6 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, the self-tightening clamping assembly 32 further includes a limiting member 323. The limiting member 323, the blocking member 321, and the clamping jaws 322 together enclose a receiving cavity 33. The limiting member 323 is disposed opposite to the feeding port 34. The limiting member 323 is used to abut against the plug 20 and is disposed on the blocking member 321 or the clamping jaws 322.

[0064] Understandably, the provision of the limiting member 323 ensures that the plug 20 can be accurately positioned within the receiving cavity 33, preventing its deviation or excessive penetration during entry, thereby avoiding improper contact or collision with other parts of the self-tightening clamping assembly 32 and ensuring the smooth progress of subsequent clamping and moving processes. Of course, the accurately positioned plug 20 allows for precise operation by the plugging device.

[0065] Furthermore, the limiting member 323 can be integrally formed on the blocking member 321 or the clamping jaws 322.

[0066] Understandably, there is no welding or assembly interface between the integrally formed limiting member 323 and the main body parts (such as the blocking member 321 or the clamping jaws 322), thus eliminating potential weak points and improving the strength and durability of the overall structure. This is particularly important for nuclear power facilities that need to operate under extreme conditions, ensuring the long-term stability and reliability of the mechanism.

[0067] As Figure 2 and Figure 6 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, the feeding drive assembly 31 includes a seat body 311 and a moving drive member 312. The seat body 311 is connected to the connecting device 1. The moving drive member 312 is disposed on the seat body 311. The moving drive member 312 is drivingly connected to the blocking member 321 and the clamping jaws 322; the moving drive member 312 drives the blocking member 321 to move, and thus the blocking member 321 drives the clamping jaws 322 to move.

[0068] Understandably, the seat body 311 plays a role in fixing and supporting. It is connected to the connecting device 1, providing an installation platform for the moving driving member 312 and also providing support for the operation of the entire feeding driving assembly 31. The moving driving member 312 is responsible for providing power to enable the self-tightening clamping assembly 32 to move along a predetermined trajectory. The moving driving member 312 indirectly controls the movement of the jaw 322 through direct connection with the blocking member 321, thereby achieving precise feeding of the plug 20.

[0069] As Figures 2 to 7 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, the moving driving member 312 includes a driving cavity 3121, a driving air joint 3122, a driving rod 3123 and a moving reset elastic member 3126. The driving cavity 3121 is formed on the seat body 311, the driving air joint 3122 is arranged on the seat body 311, the driving air joint 3122 communicates with the driving cavity 3121, the driving rod 3123 is slidably arranged in the driving cavity 3121, the driving rod 3123 is drivingly connected to the blocking member 321, one end of the moving reset elastic member 3126 is connected to the seat body 311, and the other end of the moving reset elastic member 3126 is connected to the jaw 322;

[0070] The driving air joint 3122 allows gas to be introduced into the driving cavity 3121, thereby driving the driving rod 3123 to move along the driving cavity 3121. Further, the driving rod 3123 drives the self-tightening clamping assembly 32 to move, and the moving reset elastic member 3126 provides a force for driving the self-tightening clamping assembly 32 to move in the direction close to the seat body 311.

[0071] Understandably, the driving cavity 3121 is a space formed on the seat body 311. On the one hand, it is used to accommodate and guide the linear movement of the driving rod 3123, and on the other hand, it cooperates with the driving rod 3123 to jointly form an air chamber.

[0072] The driving air joint 3122 is connected to the driving cavity 3121. The driving air joint 3122 is used to introduce compressed air or other driving gases. When the gas is introduced, pressure will be generated in the driving cavity 3121, thereby pushing the driving rod 3123 to move.

[0073] The driving rod 3123 is slidably arranged in the driving cavity 3121. One end of it is connected to the blocking member 321, and the other end is located inside the driving cavity 3121. When the driving air joint 3122 introduces gas, the driving rod 3123 moves along the axis direction of the driving cavity 3121 under the action of air pressure, and further drives the self-tightening clamping assembly 32 to complete the movement.

[0074] The movable reset elastic member 3126 can be configured as a spring or a similar elastic element, with one end connected to the base body 311 and the other end connected to the clamping jaw 322 or the blocking member 321. The function of the movable reset elastic member 3126 is to provide a driving force to drive the self-tightening clamping assembly 32 to return to the initial position after the driving gas is released or the supply is disconnected, ensuring that the mechanism can automatically reset and prepare for the next feeding of the plug 20.

[0075] It should be noted that when it is necessary to move the self-tightening clamping assembly 32 from the feeding position 4 to the loading position 5, compressed gas is introduced into the driving cavity 3121 through the driving gas joint 3122, and the air pressure pushes the driving rod 3123 to move along the axial direction, thereby driving the self-tightening clamping assembly 32 composed of the blocking member 321 and the clamping jaw 322 to move to the feeding position 4. After the feeding is completed, the air supply is stopped, and the air pressure in the driving cavity 3121 drops. At this time, the elastic force of the movable reset elastic member 3126 begins to take effect, driving the self-tightening clamping assembly 32 to move in the direction close to the base body 311, so as to achieve reset and prepare for the next feeding cycle.

[0076] As Figure 7 shown, in some embodiments of the plug conveying mechanism 10 of the nuclear power steam generator, a limiting rod 3125 is arranged in the driving cavity 3121, and a limiting through hole 3124 is formed in the driving rod 3123, and the limiting rod 3125 passes through the limiting through hole 3124.

[0077] It can be understood that the limiting rod 3125 is fixedly arranged in the driving cavity 3121, and its function is to provide guidance and limitation for the linear movement of the driving rod 3123. The diameter and length of the limiting rod 3125 are precisely designed to ensure matching with the limiting through hole 3124 on the driving rod 3123, so as to ensure the straightness and stability of the driving rod 3123 during movement.

[0078] The limiting through hole 3124 is formed in the driving rod 3123, and its position and size are designed to cooperate with the limiting rod 3125. When the driving rod 3123 moves in the driving cavity 3121, the limiting through hole 3124 will slide along the limiting rod 3125. This design limits the swing of the driving rod 3123 during movement and improves the accuracy of its movement.

[0079] In this way, not only the accuracy of the movement of the driving rod 3123 is improved, but also the positioning error of the self-tightening clamping assembly 32 that may be caused by the unstable movement of the driving rod 3123 is effectively prevented, thus ensuring the accuracy and reliability of the plug 20 feeding process.

[0080] As Figure 5 and Figure 6As shown, in some embodiments of the plug conveying mechanism 10 of a nuclear power steam generator, the conveying device 2 further includes a sealing ring 24 and a retaining ring 25. Both the sealing ring 24 and the retaining ring 25 are sleeved on the conveying piston 22. The sealing ring 24 is adapted to the inner wall surface of the conveying pipe 21, and the outer diameter of the retaining ring 25 is adapted to the inner diameter of the conveying pipe 21.

[0081] It can be understood that the sealing ring 24 is adapted to the inner wall surface of the conveying pipe 21, and its main function is to form an effective sealing interface to ensure that the gas input into the conveying pipe 21 can effectively push the conveying piston 22.

[0082] The outer diameter of the retaining ring 25 is adapted to the inner diameter of the conveying pipe 21. The retaining ring 25 is used to limit the position of the conveying piston 22 in the conveying pipe 21 to prevent it from rubbing against the inner wall surface of the conveying pipe 21 and improve the durability of the product.

[0083] As Figure 5 and Figure 6 shown, in some embodiments of the plug conveying mechanism 10 of a nuclear power steam generator, the conveying piston 22 includes a tail section 221, an intermediate section 222, and a front block 223 connected in sequence. The central axes of the tail section 221, the intermediate section 222, and the front block 223 coincide with each other in the length extension direction. The tail section 221 is used to drive the intermediate section 222 to move together after the gas is input through the conveying gas joint 23, so that the front block 223 pushes the plug 20 in the conveying pipe 21 to move.

[0084] It can be understood that the tail section 221 is mainly used to receive the gas pressure from the conveying gas joint 23. When the gas is input through the conveying gas joint 23, the tail section 221 is pushed by the gas and starts to move. The intermediate section 222 drives the front block 223 to move together through the movement of the tail section 221. The front block 223 is in direct contact with the plug 20. The shape and size of the front block 223 need to match the plug 20 to ensure that when pushing the plug 20, sufficient contact area and uniform pressure distribution can be provided to avoid damaging the plug 20.

[0085] As Figures 1 to 6 shown, in some embodiments of the plug conveying mechanism 10 of a nuclear power steam generator, a through hole 11 is provided on the connecting device 1. The end of the conveying pipe 21 away from the conveying gas joint 23 is screwed to the connecting device 1, and the conveying pipe 21 is aligned with the through hole 11. The through hole 11 is for the plug 20 to pass through.

[0086] Understandably, the via hole 11 is provided for the plug 20 to pass through. The diameter and position of the via hole 11 can be flexibly set, specifically to ensure that the plug 20 can smoothly transition from the delivery pipe 21 to the subsequent moving trajectory without causing obstruction or jamming. The delivery pipe 21 is threadedly connected to the connecting device 1, providing reliable mechanical connection strength, facilitating the installation and disassembly of the delivery pipe 21, and being conducive to daily maintenance and troubleshooting. The screw connection design also ensures the precise alignment of the delivery pipe 21 with the via hole 11, reducing the risk of deviation of the plug 20 during transportation.

[0087] Implementing the present utility model has the following beneficial effects:

[0088] The present utility model relates to a plug conveying mechanism 10 for a nuclear power steam generator. By setting a plug 20 conveying mechanism for continuous conveyance, the plug 20 can be automatically and continuously conveyed to a designated position, avoiding the frequent manual feeding process in traditional plugging operations, that is, there is no need to manually reload the plug 20 onto the plugging device after plugging a single plugging position on the evaporator. This greatly improves the continuity and efficiency of the plugging operation. The automated plug 20 conveying and feeding process reduces the direct participation of operators, reduces the risk of manual operation under extreme conditions, and enhances the safety of the entire plugging operation.

[0089] Secondly, the setting of the self-tightening clamping assembly 32 ensures the stable positioning of the plug 20 during transportation, accurately controlling the position of the plug 20 at the feeding position 5, facilitating subsequent connection operations, and improving the accuracy of plugging. The settings of the conveying piston 22 and the conveying air joint 23 enable the present utility model to adapt to different specifications of plugs 20 by adjusting the gas pressure, enhancing the adaptability and flexibility of the plug 20 conveying mechanism.

[0090] The solution of the present utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present utility model. Additionally, it can be understood that the steps in the method embodiments of the present utility model can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present utility model can be combined, divided, and deleted according to actual needs.

[0091] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A plug conveying mechanism for a nuclear power steam generator, characterized in that It includes a connecting device, a conveying device and a feeding device; The conveying device includes a conveying pipe, a conveying piston and a conveying air joint. The conveying pipe is arranged on the connecting device. A number of plugs are sequentially placed in the conveying pipe. The conveying piston is slidably arranged in the conveying pipe. The conveying air joint communicates with the conveying pipe. The conveying air joint supplies gas into the conveying pipe, so that the conveying piston pushes each plug to move along the conveying pipe to the feeding device; The feeding device includes a feeding driving component and a self-tightening clamping component. The feeding driving component drives the self-tightening clamping component to move relative to the connecting device between a feeding position and a feeding position. When the self-tightening clamping component is at the feeding position, the plug discharged from the conveying pipe can enter and be clamped by the self-tightening clamping component, so that the self-tightening clamping component can drive the plug to move to the feeding position.

2. The plug conveying mechanism of the nuclear power steam generator according to claim 1, wherein The self-tightening clamping component includes a blocking member, a clamping jaw and a clamping driving member. The clamping jaw is movably arranged on the blocking member. The feeding driving component is respectively connected to the blocking member and the clamping jaw. The feeding driving component drives the blocking member to drive the clamping jaw to move. The clamping driving member is arranged between the blocking member and the clamping jaw. The clamping driving member is used to provide relative movement between the blocking member and the clamping jaw to clamp the plug.

3. The plug conveying mechanism for a nuclear power steam generator according to claim 2, characterized in that, The clamping driving member includes a clamping reset elastic member and a top block; The top block is slidably arranged on the blocking member. The clamping reset elastic member is arranged on the blocking member. The clamping reset elastic member is drivingly connected to the top block. The top block is driven by the clamping reset elastic member to abut against the clamping jaw. The clamping reset elastic member provides a force for driving the clamping jaw to rotate through the top block, so that the clamping jaw and the blocking member jointly clamp the plug.

4. The plug conveying mechanism for a nuclear power steam generator according to claim 2, characterized in that, The blocking member and the clamping jaw jointly enclose a storage cavity and a feeding port. The inner wall contour of the storage cavity is adapted to the surface contour of a single plug. The feeding port communicates with the storage cavity. The feeding port allows the plug to enter the storage cavity.

5. The plug conveying mechanism of the nuclear power steam generator according to claim 4, characterized in that, A relief groove is formed in the blocking member. The relief groove communicates with the storage cavity; and / or The self-tightening clamping component further includes a limiting member. The limiting member, the blocking member and the clamping jaw jointly enclose the storage cavity. The limiting member is arranged opposite to the feeding port. The limiting member is used to abut against the plug. The limiting member is arranged on the blocking member or the clamping jaw.

6. The plug conveying mechanism for a nuclear power steam generator according to any one of claims 2 to 5, characterized in that, The feeding driving component includes a seat body and a moving driving member. The seat body is connected to the connecting device. The moving driving member is arranged on the seat body. The moving driving member is drivingly connected to the blocking member and the clamping jaw; Wherein, the moving driving member drives the blocking member to move, so that the blocking member drives the clamping jaw to move.

7. The plug conveying mechanism for a nuclear power steam generator according to claim 6, characterized in that, The moving driving member includes a driving cavity, a driving air joint, a driving rod, and a moving reset elastic member. The driving cavity is formed in the base body. The driving air joint is arranged on the base body. The driving air joint communicates with the driving cavity. The driving rod is slidably arranged in the driving cavity. The driving rod is drivingly connected to the blocking member. One end of the moving reset elastic member is connected to the base body, and the other end of the moving reset elastic member is connected to the clamping jaw. The driving air joint is for introducing gas into the driving cavity, so as to drive the driving rod to move along the driving cavity. Further, the driving rod drives the self-tightening clamping assembly to move. The moving reset elastic member provides a force for driving the self-tightening clamping assembly to move towards the direction close to the base body.

8. The plug conveying mechanism of the nuclear power steam generator according to claim 7, characterized in that, A limiting rod is arranged in the driving cavity. A limiting through hole is formed in the driving rod, and the limiting rod passes through the limiting through hole.

9. The plug conveying mechanism for a nuclear power steam generator according to any one of claims 1 to 5, characterized in that, The conveying device further includes a sealing ring and a retaining ring. Both the sealing ring and the retaining ring are sleeved on the conveying piston. The sealing ring is adapted to the inner wall surface of the conveying pipe. The outer diameter of the retaining ring is adapted to the inner diameter of the conveying pipe; and / or The conveying piston includes a tail section member, an intermediate member, and a front baffle which are sequentially connected. The central axes of the tail section member, the intermediate member, and the front baffle coincide with each other in the length extension direction. The tail section member is used for driving the intermediate member to move together after gas is input through the conveying air joint, so that the front baffle pushes the plug in the conveying pipe to move.

10. The plug conveying mechanism of a nuclear power steam generator according to any one of claims 1 to 5, characterized in that, A through hole is formed in the connecting device. The end of the conveying pipe away from the conveying air joint is screwed to the connecting device, and the conveying pipe is aligned with the through hole. The through hole is for the plug to pass through.

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