Pipe plugging equipment for nuclear power steam generator

Abstract

According to the pipe plugging equipment for the nuclear power steam generator, the driving device and the fluid guiding device are arranged, so that the operation process of pipe plugging is greatly simplified, and the working intensity of operators is reduced. The hydraulic guide assembly and the gas guide assembly are matched for use, so that the heat transfer pipe can be quickly plugged by the plug, the time required by pipe plugging is shortened, and the efficiency of pipe plugging operation is improved. Furthermore, the pipe plugging equipment for the nuclear power steam generator can be suitable for heat transfer pipes of different sizes and types, can be used in different nuclear power station environments, and has good universality and adaptability.

Description

Technical Field

[0001] The invention relates to the field of nuclear power, and in particular to a tube blocking device for a nuclear power steam generator. Background Art

[0002] As a key component connecting the reactor and the steam turbine generator set, the steam generator of a nuclear power plant plays an important role in the nuclear energy conversion process. Among them, the heat transfer tube is one of the core components of the steam generator, which is used to achieve heat exchange between the primary side coolant (usually high-pressure water) and the secondary side feed water, thereby generating high-temperature steam to drive the steam turbine to generate electricity.

[0003] During long-term operation, heat transfer tubes may be damaged due to various factors such as corrosion and fatigue, which may lead to coolant leakage and other problems. In serious cases, it may even affect the safe and stable operation of the entire nuclear power plant. Therefore, it is very important to repair the damaged heat transfer tubes in a timely and effective manner. At present, the most common way to deal with damaged heat transfer tubes is to use pipe plugging technology to seal them to isolate the damaged pipeline and ensure the normal operation of the remaining intact heat transfer tubes. However, the existing pipe plugging methods, such as welding pipe plugging and mechanical pipe expansion, have the disadvantages of complex operation and long time consumption. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a nuclear power steam generator pipe plugging device, which can solve the technical problems of complex and time-consuming pipe plugging operations.

[0005] The present invention provides a nuclear power steam generator pipe plugging device, which is used for plugging a heat transfer pipe, wherein the heat transfer pipe is arranged on a tube sheet. The nuclear power steam generator pipe plugging device comprises:

[0006] A driving device, the driving device comprising a cylinder and a piston, the cylinder being disposed on the tube plate, and the piston being slidably disposed in the piston;

[0007] a fluid guiding device, the fluid guiding device comprising a hydraulic guiding assembly and a gas guiding assembly, the hydraulic guiding assembly and the gas guiding assembly being respectively connected to the cylinder body; and

[0008] A mandrel, one end of which is connected to the piston, and the other end of which is detachably connected to a pipe plug;

[0009] Among them, the hydraulic guide assembly is used to guide the liquid into the cylinder to drive the piston to move in the direction away from the tube sheet, so that the plug is driven to abut against the tube sheet through the core shaft, and the core shaft is withdrawn from the plug so that the plug blocks the heat transfer tube; the gas guide assembly is used to guide the gas into the cylinder to drive the piston to move in the direction close to the tube sheet, so that the core shaft is inserted and connected to the plug.

[0010] Preferably, the plug includes a plugging tube and an expansion block, the plugging tube is provided with an insertion hole, the diameter of the insertion hole gradually increases along the hole depth direction to form a small diameter end and a large diameter end, and the expansion block is arranged at the large diameter end;

[0011] The core shaft is inserted into the expansion block through the small diameter end. When the expansion block is driven by the core shaft and passes through the small diameter end, the hole wall of the insertion hole is deformed by the expansion block, so that the sealing tube expands and abuts against the inner wall surface of the heat transfer tube.

[0012] Preferably, the cross section of the expansion block in the height direction is trapezoidal.

[0013] Preferably, the end of the core shaft is provided with a connecting thread, and the connecting thread is screwed to the expansion block.

[0014] Preferably, the hydraulic guide assembly includes a liquid guide pipe and a liquid guide hole, the liquid guide hole is arranged on the cylinder body, the liquid guide pipe is connected to the liquid guide hole, the liquid guide pipe is used to introduce liquid into the liquid guide hole, and the liquid guide hole is used to introduce liquid into the cylinder body.

[0015] Preferably, the gas guide assembly includes an air hole and an air pipe, the air hole is arranged on the cylinder body, the air pipe is connected to the air hole, the air pipe is used to introduce gas into the air hole, and the air hole is used to introduce gas into the cylinder body.

[0016] Preferably, an active cavity is opened in the cylinder body, at least one sealing ring is arranged on the piston, the sealing ring is sealed against the inner wall surface of the active cavity, the piston is slidably arranged in the active cavity, the hydraulic guide assembly and the gas guide assembly are respectively connected to the active cavity, and the core shaft passes through the active cavity to the outside of the cylinder body.

[0017] Preferably, a position avoidance hole is further provided on the cylinder body, the diameter of the position avoidance hole is matched with the core shaft, and the diameter of the position avoidance hole is smaller than the inner diameter of the heat transfer tube.

[0018] Preferably, the driving device further comprises a rotary driving member, the rotary driving member is drivingly connected to the piston, and the rotary driving member is used to drive the piston to rotate, thereby driving the core shaft to rotate.

[0019] Preferably, the driving device further comprises a rotary connecting member, one end of which is inserted into the cylinder body and connected to the piston, and the other end of which is exposed outside the cylinder body, and the rotary driving member is drivingly connected to the rotary connecting member.

[0020] The implementation of the present invention has the following beneficial effects:

[0021] The invention relates to a nuclear power steam generator pipe blocking device, which greatly simplifies the pipe blocking operation process and reduces the work intensity of operators through the arrangement of a driving device and a fluid guiding device.

[0022] By using the hydraulic guide assembly in conjunction with the gas guide assembly, the plugging of the heat transfer tube can be completed quickly, which reduces the time required for plugging and improves the efficiency of the plugging operation.

[0023] Furthermore, the nuclear power steam generator tube plugging equipment can be applied to heat transfer tubes of different sizes and types and can be used in different nuclear power plant environments, and has good versatility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0025] Figure 1 It is a structural schematic diagram of a nuclear power steam generator tube plugging device assembled on a tube sheet in some embodiments of the present invention;

[0026] Figure 2 yes Figure 1 The schematic diagram of the internal structure of the tube plugging equipment, tube sheet and heat transfer tube of a nuclear power steam generator is shown;

[0027] Figure 3 yes Figure 2 A structural diagram of the local position of

[0028] Figure 4 It is a structural schematic diagram of a nuclear power steam generator tube blocking device assembled on a tube sheet in other embodiments of the present invention;

[0029] Figure 5 From another perspective Figure 4 The schematic diagram of the structure of the nuclear power steam generator tube plugging device assembled on the tube plate;

[0030] Figure 6 yes Figure 4 Schematic diagram of the internal structure. DETAILED DESCRIPTION

[0031] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, 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 invention, 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 as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as a limitation on the present invention.

[0034] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Figure 1 The nuclear power steam generator tube plugging device 10 in some embodiments of the present invention is shown, which is used to plug the heat transfer tube 4, and the heat transfer tube 4 is arranged on the tube sheet 5. It should be noted that the tube sheet 5 is used to fix the heat transfer tube 4, and the heat transfer tube 4 is used for heat exchange.

[0036] like Figures 1 to 3 As shown, the nuclear power steam generator pipe plugging device 10 includes a driving device 1, a fluid guiding device 2 and a core shaft 3, the fluid guiding device 2 is connected to the driving device 1, and the core shaft 3 is arranged on the driving device 1.

[0037] It can be understood that the driving device 1 is used to align the ends of the heat transfer tube 4 on the one hand, and to drive the core shaft 3 to move on the other hand. The fluid guiding device 2 is used to guide the fluid to the driving device 1 accordingly, so that the driving device 1 obtains kinetic energy, and then the driving device 1 can drive the core shaft 3 to move in a predetermined direction. The core shaft 3 is used to connect with the plug 6, so that the plug 6 can be driven to move in the heat transfer tube; the core shaft 3 is also used to drive the plug 6 to expand when the plug 6 is withdrawn, and the expanded plug 6 will be against the inner wall surface of the heat transfer tube 4 along the circumferential direction, so as to form a stable and reliable blockage at the abutment position between the plug 6 and the heat transfer tube 4, and complete the pipe plugging work.

[0038] like Figures 1 to 3 As shown, the driving device 1 includes a cylinder body 11 and a piston 12, the cylinder body 11 is arranged on the tube plate 5, and the piston 12 is slidably arranged in the piston 12; the fluid guiding device 2 includes a hydraulic guiding component 21 and a gas guiding component 22, and the hydraulic guiding component 21 and the gas guiding component 22 are respectively connected to the cylinder body; one end of the core shaft 3 is connected to the piston 12, and the other end of the core shaft 3 is detachably connected to the pipe plug 6.

[0039] The hydraulic guide assembly 21 is used to guide the liquid into the cylinder 11 to drive the piston 12 to move in the direction away from the tube sheet 5, thereby driving the plug 6 to abut against the tube sheet 5 through the core shaft 3, and making the core shaft 3 withdraw from the plug 6 so that the plug 6 blocks the heat transfer tube 4; the gas guide assembly 22 is used to guide the gas into the cylinder 11 to drive the piston 12 to move in the direction close to the tube sheet 5, so that the core shaft 3 is inserted and connected to the plug 6.

[0040] It can be understood that the cylinder body 11 is fixedly arranged on the tube sheet 5, and a space for accommodating the piston 12 is formed inside the cylinder body 11. The design of the cylinder body 11 ensures that the piston 12 can slide smoothly therein. The piston 12 is slidably arranged in the cylinder body 11, and forms a closed space with the cylinder body 11; the fluid guiding device 2 guides the fluid into different positions of the closed space, which will cause the piston 12 to move in different directions. The movement direction of the piston 12 determines the installation and removal actions of the plug 6.

[0041] The hydraulic guide assembly 21 is used to transport liquid into the cylinder 11, and drives the piston 12 to move away from the tube sheet 5 through the change of liquid pressure. During this process, the piston 12 pushes the plug 6 against the tube sheet 5 through the core shaft 3, and then the core shaft 3 withdraws from the plug 6, so that the plug 6 firmly blocks the heat transfer tube 4.

[0042] The gas guide assembly 22 is used to deliver gas into the cylinder 11, and the pressure change of the gas drives the piston 12 to move toward the tube sheet 5. At this time, the core shaft 3 is inserted and connected with the plug 6, preparing for the subsequent plugging work of the plug 6.

[0043] The core shaft 3 is used to realize the installation and removal of the plug 6 under the drive of the piston 12.

[0044] It should be noted that by driving the piston to move hydraulically, the incompressible liquid can stably support the piston to move, ensuring that the pipe plugging is completed smoothly. By driving the piston to move by gas, the piston can move quickly, so that the core shaft can be quickly connected to the plug, improving the efficiency of pipe plugging.

[0045] It should also be noted that the present invention realizes the automatic installation and disassembly of the plug 6 through the coordinated use of hydraulic and gas guide components, eliminating the tedious manual disassembly and installation of the plug, greatly simplifying the pipe plugging operation process. At the same time, the present invention can quickly complete the installation and disassembly of the plug 6, effectively shortening the time of the pipe plugging operation and improving work efficiency.

[0046] In addition, the plug and the core shaft can be connected and fixed outside the heat transfer tube, and then the nuclear power steam generator tube plugging device 10 can be moved to a position aligned with the heat transfer tube by a moving mechanism or a mechanical arm.

[0047] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, the plug 6 includes a plugging tube 61 and an expansion block 62, the plugging tube 61 is provided with a plug hole 63, the diameter of the plug hole 63 gradually increases along the hole depth direction to form a small diameter end 631 and a large diameter end 632, and the expansion block 62 is arranged at the large diameter end 632;

[0048] The core shaft 3 is inserted into the expansion block 62 through the small diameter end 631. When the expansion block 62 is driven by the core shaft 3 and passes through the small diameter end 631, the hole wall of the insertion hole 63 is deformed by the expansion block 62, so that the sealing tube 61 expands and presses against the inner wall surface of the heat transfer tube 4.

[0049] It can be understood that the plugging cylinder 61 is used to plug the heat transfer tube 4, and one end of the plugging cylinder 61 is provided with a plug hole 63 for inserting the core shaft 3. The expansion block 62 is located at the large diameter end 632 of the plugging cylinder 61. After the core shaft 3 is inserted into the expansion block 62, the expansion block 62 will be fixed to the end of the core shaft 3.

[0050] The small diameter end 631 of the jack 63 is the position where the mandrel 3 is inserted into the plugging tube 61. The mandrel can be inserted into the jack 63 through the small diameter end, so that the mandrel can be correspondingly inserted into the plug at the large diameter end. The large diameter end 632 of the jack 63 has a larger aperture, and the expansion block 62 is set here. After the mandrel 3 is inserted into the expansion block 62, the expansion block 62 will be fixed to the end of the mandrel 3.

[0051] In actual operation, the gas guide assembly 22 introduces gas into the cylinder 11, and the piston 12 drives the core shaft 3 to be inserted into the small diameter end 631 and further inserts the expansion block 62 connected to the large diameter end 632. Then, the hydraulic guide assembly 21 introduces liquid into the cylinder 11, so that the piston 12 moves in the reverse direction, and the core shaft 3 drives the plugging cylinder 61 to move in the reverse direction through the expansion block 62 until the plugging cylinder 61 is abutted and limited on the tube sheet 5. As the hydraulic guide assembly 21 further introduces liquid into the cylinder 11, the core shaft 3 will drive the expansion block 62 to continue to move. At this time, since the plugging cylinder 61 is limited on the tube sheet and cannot continue to move, the expansion block 62 will move to the small diameter end 631.

[0052] While the expansion block 62 moves to the small-diameter end 631, the expansion block 62 will support the inner wall of the sealing tube 61, so that the outer contour of the sealing tube 61 gradually becomes larger, and the peripheral outer wall of the sealing tube 61 is supported on the inner wall of the heat transfer tube 4, thereby completing the sealing of the heat transfer tube.

[0053] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, the cross-section of the expansion block 62 in the height direction is trapezoidal.

[0054] It can be understood that the cross-section of the expansion block 62 in the height direction is designed to be trapezoidal, which means that the width of the expansion block 62 is narrower at one end and wider at the other end; further, when the expansion block 62 with a trapezoidal cross-section moves along the direction required for pipe plugging, the smaller end of the expansion block 62 will abut against the wall of the hole 63 before the wider end, and with the further movement of the expansion block 62, the deformation and expansion process of the plugging tube 61 will be smoother, thereby avoiding direct damage to the expansion block due to excessive deformation in a short time.

[0055] In some embodiments of the nuclear power steam generator pipe plugging device 10 , a connecting thread is provided at the end of the core shaft 3 , and the connecting thread is screwed to the expansion block 62 .

[0056] It can be understood that the connecting thread is screwed to the expansion block 62 to ensure a stable connection between the two. At the same time, the connecting thread can only be unlocked by relative rotation in the circumferential direction, and the mandrel 3 will not be driven to rotate during the pipe blocking process, thus avoiding the mandrel 3 and the expansion block 62 from accidentally disengaging.

[0057] like Figures 1 to 3As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, the hydraulic guide assembly 21 includes a liquid guide pipe 211 and a liquid guide hole 212. The liquid guide hole 212 is arranged on the cylinder body 11. The liquid guide pipe 211 is connected to the liquid guide hole 212. The liquid guide pipe 211 is used to introduce liquid into the liquid guide hole 212. The liquid guide hole 212 is used to introduce liquid into the cylinder body 11.

[0058] It can be understood that the liquid guide pipe 211 is used to introduce liquid from the outside into the liquid guide hole 212, and the liquid guide hole 212 is opened on the cylinder body 11, so that the liquid can be further introduced into the cylinder body 11 through the liquid guide hole 212. It should be noted that the liquid can be supplied by an external liquid pump, and the liquid pump pumps the liquid into the liquid guide pipe 211. In this way, the operator can control the liquid pump at a remote end, eliminating the need to manually enter the nuclear power heat exchanger, thereby improving the safety factor of nuclear power pipe blockage.

[0059] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, the gas guide assembly 22 includes an air hole 221 and an air pipe 222. The air hole 221 is arranged on the cylinder body 11, and the air pipe 222 is connected to the air hole 221. The air pipe 222 is used to introduce gas into the air hole 221, and the air hole 221 is used to introduce gas into the cylinder body 11.

[0060] It can be understood that the air hole 221 is opened on the cylinder body 11 for introducing the gas into the cylinder body 11. The air pipe 222 is used to introduce the gas from the outside into the air hole 221 and finally into the cylinder body 11.

[0061] It should be noted that the gas can be pumped into the air pipe 222 by an air pump, or the air pipe 222 can be directly connected to the air source in the factory. The operator can also remotely control the air path to ensure the safety factor of pipe blocking.

[0062] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, an active chamber 18 is opened in the cylinder body 11, and at least one sealing ring 13 is arranged on the piston 12. The sealing ring 13 is sealed against the inner wall surface of the active chamber 18, and the piston 12 is slidably arranged in the active chamber 18. The hydraulic guide assembly 21 and the gas guide assembly 22 are respectively connected to the active chamber 18, and the core shaft 3 passes through the active chamber 18 to the outside of the cylinder body 11.

[0063] It can be understood that the active cavity 18 is used to provide the required space for the piston 12 to slide, and also allows liquid and gas to be introduced therein, so that the piston can slide along the active cavity 18 through the action of liquid or gas on the piston. The sealing ring 13 is used to seal against the inner wall surface of the active cavity 18 to ensure that the piston 12 does not leak hydraulic pressure or gas when sliding in the active cavity 18; specifically, the sealing ring allows the gas and liquid to be always confined to the corresponding side surface of the piston 12.

[0064] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe blocking device 10, a avoidance hole 17 is further opened on the cylinder body 11, and the aperture of the avoidance hole 17 is adapted to the core shaft 3, and the aperture of the avoidance hole 17 is smaller than the inner diameter of the heat transfer tube 4.

[0065] It can be understood that the diameter of the avoidance hole 17 is adapted to the core shaft 3, ensuring that the core shaft 3 can smoothly pass through the avoidance hole 17. The diameter of the avoidance hole 17 is smaller than the inner diameter of the heat transfer tube 4, ensuring that the core shaft 3 can pass through the avoidance hole 17 without contacting the inner wall of the heat transfer tube 4.

[0066] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe plugging device 10, the driving device 1 also includes a rotary driving member 14, which is drivingly connected to the piston 12, and the rotary driving member 14 is used to drive the piston 12 to rotate, thereby driving the core shaft 3 to rotate.

[0067] It can be understood that the rotary drive member 14 rotates with the driving piston 12. In this way, if the end of the core shaft 3 is configured as a thread, the rotating piston 12 will drive the core shaft 3 to rotate, so that the thread on the core shaft can be correspondingly screwed to the plug 6.

[0068] Specifically, the plug 6 may not be provided with an internal thread, and the plug and the end of the mandrel may also be screwed together. The plug 6 may also be provided with an internal thread, which is screwed together with the external thread of the mandrel 3.

[0069] like Figures 1 to 3 As shown, in some embodiments of the nuclear power steam generator pipe blocking equipment 10, the driving device 1 also includes a rotary connecting member 15, one end of the rotary connecting member 15 is inserted into the cylinder body 11 and connected to the piston 12, and the other end of the rotary connecting member 15 is exposed outside the cylinder body 11, and the rotary driving member 14 is drivingly connected to the rotary connecting member 15.

[0070] It can be understood that the rotary connection member 15 plays a role in transmitting torque, and the rotary driving member 14 drives the piston 12 to rotate through the rotary connection member 15 .

[0071] like Figures 4 to 6As shown, in some embodiments of the nuclear power steam generator pipe blocking device, the driving device 1 further includes a movable connection assembly 16, and the movable connection assembly 16 includes a first connection plate 161, a second connection plate 162, a support seat 163 and an elastic member 164;

[0072] The first connection disk 161 is connected to the piston 12 and exposed outside the cylinder body 11. The first connection disk 161 is provided with a plurality of first matching protrusions 1611 along the circumferential direction. The rotary driving member 14 is drivingly connected to the support seat 163. The second connection disk 162 is slidingly provided on the support seat 163. The second connection disk 162 is provided with a plurality of second matching protrusions 1621 along the circumferential direction. The elastic member 164 is provided on the support seat 163, and the elastic member 164 is drivingly connected to the second connection disk 162. The elastic member 164 provides a force to drive the second connection disk 162 to move in a direction away from the support seat 163.

[0073] Among them, when the second connecting disk 162 corresponds to the first connecting disk 161, each second matching protrusion 1621 is clamped with each first matching protrusion 1611, so that the rotary driving member 14 can drive the second connecting disk 162 to rotate through the support seat 163, and support the first matching protrusion 1611 through the second matching protrusion 1621 to drive the first connecting disk 161 to rotate, and then the first connecting disk 161 drives the piston 12 to rotate.

[0074] It can be understood that when it is necessary to drive the core shaft 3 to rotate, the moving mechanism or mechanical arm in the prior art can be used to drive the rotary drive member to move in the direction close to the cylinder body 11, so that the second connecting disk 162 is correspondingly abutted against the first connecting disk 161. When the support seat 163 drives the second connecting disk 162 to rotate the moving angle, the second connecting disk 162 will always have a tendency to move toward the first connecting disk 161 driven by the elastic member 164, so that the second connecting disk 162 rotated into place will automatically align and abut against the first connecting disk 161, so that each second mating protrusion 1621 is clamped with each first mating protrusion 1611, and then the first connecting disk 161 and the second connecting disk 162 are locked in the rotation direction, so that the second connecting disk 162 can drive the first connecting disk 161 to rotate when rotating in this direction, thereby achieving the purpose of driving the core shaft 3 to rotate.

[0075] It should be noted that the moving mechanism for driving the rotary drive member 14 to move may be a moving mechanism driven by a motor or a moving mechanism driven by a pneumatic element.

[0076] The second connection disk 162 is fixed to the support seat 163 in the circumferential rotation direction, that is, the second connection disk 162 and the support seat 163 cannot rotate relative to each other. Specifically, the second connection disk 162 and the support seat 163 can be slidably connected through a groove rail, a slide rail or a guide rod structure, and the sliding connection mechanism will limit the second connection disk 162 to move only in the direction of approaching or moving away from the support seat 163; thereby, the support seat 163 can drive the second connection disk 162 to rotate and smoothly transmit torque.

[0077] Specifically, the elastic member 164 includes a tension spring or a disc spring.

[0078] Furthermore, a positioning column is provided at the center of the first connection disk 161 , and a positioning hole is opened at the center of the second connection disk 162 . The positioning column can be detachably inserted into the positioning hole.

[0079] It can be understood that during the alignment of the second connecting disk 162 and the first connecting disk 161, the positioning column will be inserted into the positioning hole accordingly, thereby ensuring that the second connecting disk 162 and the first connecting disk 161 can be accurately aligned and that the torque can be transmitted through the second connecting disk 162 and the first connecting disk 161.

[0080] The implementation of the present invention has the following beneficial effects:

[0081] The invention relates to a nuclear power steam generator pipe blocking device, which greatly simplifies the pipe blocking operation process and reduces the work intensity of operators through the arrangement of a driving device and a fluid guiding device.

[0082] By using the hydraulic guide assembly in conjunction with the gas guide assembly, the plugging of the heat transfer tube can be completed quickly, which reduces the time required for plugging and improves the efficiency of the plugging operation.

[0083] Furthermore, the nuclear power steam generator tube plugging equipment can be applied to heat transfer tubes of different sizes and types and can be used in different nuclear power plant environments, and has good versatility and adaptability.

[0084] The scheme of the present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are 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 required for the present invention. In addition, it can be understood that the steps in the method of the embodiment of the present invention can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present invention can be merged, divided and deleted according to actual needs.

[0085] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection 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 persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A nuclear power steam generator pipe plugging device, used for plugging a heat transfer pipe, wherein the heat transfer pipe is arranged on a tube sheet, and is characterized in that: The nuclear power steam generator pipe blocking equipment comprises: A driving device, the driving device comprising a cylinder and a piston, the cylinder being disposed on the tube plate, and the piston being slidably disposed in the piston; a fluid guiding device, the fluid guiding device comprising a hydraulic guiding assembly and a gas guiding assembly, the hydraulic guiding assembly and the gas guiding assembly being respectively connected to the cylinder body; and A mandrel, one end of which is connected to the piston, and the other end of which is detachably connected to a pipe plug; Among them, the hydraulic guide assembly is used to guide the liquid into the cylinder to drive the piston to move in the direction away from the tube sheet, so that the plug is driven to abut against the tube sheet through the core shaft, and the core shaft is withdrawn from the plug so that the plug blocks the heat transfer tube; the gas guide assembly is used to guide the gas into the cylinder to drive the piston to move in the direction close to the tube sheet, so that the core shaft is inserted and connected to the plug.

2. The nuclear power steam generator pipe blocking device according to claim 1, characterized in that: The plug includes a plugging tube and an expansion block, the plugging tube is provided with an insertion hole, the diameter of the insertion hole gradually increases along the hole depth direction to form a small diameter end and a large diameter end, and the expansion block is arranged at the large diameter end; The core shaft is inserted into the expansion block through the small diameter end. When the expansion block is driven by the core shaft and passes through the small diameter end, the hole wall of the insertion hole is deformed by the expansion block, so that the sealing tube expands and abuts against the inner wall surface of the heat transfer tube.

3. The nuclear power steam generator pipe blocking device according to claim 2, characterized in that: The cross section of the expansion block in the height direction is trapezoidal.

4. The nuclear power steam generator pipe blocking device according to claim 2 or 3, characterized in that: The end of the core shaft is provided with a connecting thread, and the connecting thread is screwed to the expansion block.

5. The nuclear power steam generator pipe blocking equipment according to claim 1, characterized in that: The hydraulic guide assembly includes a liquid guide pipe and a liquid guide hole. The liquid guide hole is arranged on the cylinder body. The liquid guide pipe is connected to the liquid guide hole. The liquid guide pipe is used to introduce liquid into the liquid guide hole. The liquid guide hole is used to introduce liquid into the cylinder body.

6. The nuclear power steam generator pipe blocking equipment according to claim 1, characterized in that: The gas guide assembly includes an air hole and an air pipe, wherein the air hole is arranged on the cylinder body, the air pipe is connected to the air hole, the air pipe is used to introduce gas into the air hole, and the air hole is used to introduce gas into the cylinder body.

7. The nuclear power steam generator pipe blocking device according to any one of claims 1, 5 and 6, characterized in that: An active cavity is provided inside the cylinder body, at least one sealing ring is provided on the piston, the sealing ring is sealed against the inner wall surface of the active cavity, the piston is slidably provided in the active cavity, the hydraulic guide assembly and the gas guide assembly are respectively connected to the active cavity, and the core shaft passes through the active cavity to the outside of the cylinder body.

8. The nuclear power steam generator pipe blocking device according to claim 7, characterized in that: The cylinder body is also provided with an avoidance hole, the diameter of which is matched with the core shaft, and the diameter of which is smaller than the inner diameter of the heat transfer tube.

9. The nuclear power steam generator pipe blocking device according to claim 1, characterized in that: The driving device also includes a rotary driving member, which is drivingly connected to the piston and is used to drive the piston to rotate, thereby driving the core shaft to rotate.

10. The nuclear power steam generator pipe blocking equipment according to claim 9, characterized in that: The driving device also includes a rotary connecting member, one end of which is inserted into the cylinder body and connected to the piston, and the other end of which is exposed outside the cylinder body, and the rotary driving member is drivingly connected to the rotary connecting member.

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