Anvil block of pipe plugging equipment of nuclear power evaporator

Abstract

The utility model relates to an anvil block of pipe plugging equipment of a nuclear power evaporator, which is provided with a support device with a buffer bushing, so that the damage of the pipe plugging equipment to a pipe plate of the evaporator in the use process is effectively avoided, and the service life of the evaporator is prolonged. Due to the arrangement of the small-diameter end on the supporting cylinder, the supporting device can be accurately aligned with the interior of the heat transfer tube, the small-diameter end is prevented from abutting against the evaporator tube plate and the heat transfer tube, and the precision and reliability of tube blocking operation are improved. And secondly, due to the arrangement of the guide lubricating sleeve, the friction between the pipe plugging tool and the through hole can be reduced, the pipe plugging process is smoother, and the operation difficulty is reduced. And due to the arrangement of the buffer lining, vibration possibly generated in the pipe blocking process can be reduced to a certain extent, and the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power pipe blocking equipment, in particular to an anvil for nuclear power evaporator pipe blocking equipment. Background Art

[0002] Heat transfer tubes within nuclear power plant evaporators can break during unit operation. The most common repair method is to plug the tubes. Pull-out plugging involves inserting a pull-out plug into the tube, pulling out the expansion block inside the plug, and tightening the plug onto the tube.

[0003] In the related art, pipe plugging operations are generally performed through pipe plugging equipment or pipe plugging tools, so that personnel can stay as far away from the radiation area as possible. However, in order to ensure the stability and accuracy of the pipe plugging operation, the existing pipe plugging equipment or pipe plugging tools need to always be close to the surface of the evaporator tube sheet, which makes it easy to crush or damage the evaporator tube sheet during the subsequent plugging transportation process, seriously affecting the service life of the steam tube sheet, which plays an important role. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anvil for a nuclear power evaporator tube blocking device, which can solve the problem that the tube blocking device is easy to damage the evaporator tube plate during use.

[0005] The utility model provides an anvil for a nuclear power evaporator tube blocking device, which is arranged on an evaporator tube sheet. A heat transfer tube is arranged on the evaporator tube sheet. The ends of the heat transfer tubes are welded to the evaporator tube sheet, thereby forming a weld around the ends of the heat transfer tubes. The anvil for the nuclear power evaporator tube blocking device includes:

[0006] A support device, the support device comprising a mounting plate and a support tube, the support tube being disposed on the mounting plate, the support tube having a relief groove on a side away from the mounting plate, thereby forming a small-diameter end on the support tube, the outer diameter of the small-diameter end being smaller than the inner diameter of the heat transfer tube, and a through hole being disposed on the support device, the through hole penetrating the mounting plate, the support tube, and the small-diameter end;

[0007] A buffer bushing, the buffer bushing is sleeved on the support tube and is located in the avoidance groove; and

[0008] A guide lubricating sleeve, the guide lubricating sleeve is arranged in the through hole, the outer side of the circumference of the guide lubricating sleeve is abutted against the hole wall of the through hole, and the guide lubricating sleeve is provided with a through hole in the length extension direction;

[0009] Wherein, the through hole is aligned with the heat transfer tube, and the buffer bushing is supported on the evaporator tube plate and the weld.

[0010] Preferably, the guide lubrication sleeve comprises a copper sleeve.

[0011] Preferably, one end of the guide lubrication sleeve is flush with one end of the through hole, and the length of the guide lubrication sleeve is smaller than the length of the through hole.

[0012] Preferably, the mounting plate, the support tube and the small-diameter end are an integrally formed structure.

[0013] Preferably, the outer side wall of the buffer bushing is aligned with the circumferential side wall of the support tube.

[0014] Preferably, the height of the avoidance groove is 5 mm to 8.9 mm; and / or

[0015] The width of the avoidance groove is 3.1 mm to 3.7 mm.

[0016] Preferably, the buffer sleeve comprises a nylon sleeve; or

[0017] The buffer bushing is annular.

[0018] Preferably, the weld is annular and surrounds the end of the heat transfer tube.

[0019] Preferably, the mounting plate has a chamfered surface on the outer side of the periphery.

[0020] Preferably, the anvil of the nuclear power evaporator tube blocking device further includes a plug, which is used to penetrate the through hole and enter the heat transfer tube.

[0021] The implementation of this utility model has the following beneficial effects:

[0022] This utility model relates to an anvil for a nuclear power evaporator tube plugging device. By providing a support device with a buffer bushing, it effectively prevents damage to the evaporator tube sheet during use, thereby extending the evaporator's service life. The small-diameter end of the support tube allows the support device to be precisely aligned with the interior of the heat transfer tube, preventing the small-diameter end from abutting the evaporator tube sheet and the heat transfer tube, thereby improving the accuracy and reliability of the tube plugging operation.

[0023] Secondly, the provision of a guide lubrication sleeve can reduce friction between the pipe plugging tool and the through-hole, making the plugging process smoother and reducing operational difficulty. The provision of a buffer bushing can also reduce vibration that may occur during the plugging process to a certain extent, improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0025] Figure 1 It is a structural schematic diagram of an anvil of a nuclear power evaporator pipe blocking device and a nuclear power evaporator in some embodiments of the present invention;

[0026] Figure 2 It is a structural schematic diagram of an anvil of a nuclear power evaporator pipe blocking device in some embodiments of the present invention;

[0027] Figure 3 From another perspective Figure 2 The structural diagram of the anvil of the nuclear power evaporator pipe blocking equipment shown;

[0028] Figure 4 It is an exploded view of the anvil of the nuclear power evaporator pipe blocking device in some embodiments of the present invention. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present invention, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, 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.

[0030] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type 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, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] 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", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] Figure 1 The anvil 10 of the nuclear power evaporator pipe blocking device in some embodiments of the present invention is shown. The anvil 10 of the nuclear power evaporator pipe blocking device plays the role of guiding the pipe blocking device to perform the pipe blocking work.

[0034] like Figure 1 As shown, the anvil 10 of the nuclear power evaporator tube blocking device is set on the evaporator tube plate 20, and the evaporator tube plate 20 is provided with a heat transfer tube 30. The end of the heat transfer tube 30 is welded to the evaporator tube plate 20, so that a weld 40 is formed around the end of the heat transfer tube 30.

[0035] It is understood that the evaporator tube sheet 20 is used to fix the heat transfer tubes 30, which are used to allow liquid to flow. The welds 40 are formed by welding the ends of the heat transfer tubes 30 to the evaporator tube sheet 20. Specifically, the welds 40 are formed by welding along the circumferential contour of the ends of the heat transfer tubes 30.

[0036] like Figures 1 to 4 As shown, the anvil 10 of the nuclear power evaporator pipe blocking device includes a support device 1, a buffer bushing 2, and a guide lubricating sleeve 3. The buffer bushing 2 and the guide lubricating sleeve 3 are both mounted on the support device 1. As can be understood, the support device 1 serves to secure the buffer bushing 2 and the guide lubricating sleeve 3. The buffer bushing 2 serves as an isolation and buffer. The guide lubricating sleeve 3 provides lubrication and guidance.

[0037] like Figures 1 to 4As shown, the support device 1 includes a mounting plate 11 and a support tube 12. The support tube 12 is arranged on the mounting plate 11. The support tube 12 is provided with a avoidance groove 121 on the side away from the mounting plate 11, thereby forming a small diameter end 122 on the support tube 12. The outer diameter of the small diameter end 122 is smaller than the inner diameter of the heat transfer tube 30. A through hole 13 is provided on the support device 1, and the through hole 13 passes through the mounting plate 11, the support tube 12 and the small diameter end 122.

[0038] As can be understood, mounting plate 11 is used to secure support tube 12 and is also used to connect to a pipe plugging device. During the plugging process, the external pipe plugging device drives support device 1 as a whole to a predetermined position via mounting plate 11 for subsequent plugging operations. Support tube 12 supports buffer bushing 2 and guide lubricating sleeve 3.

[0039] The design of the small diameter end 122 ensures that when the support device 1 is placed on the evaporator tube sheet 20, the small diameter end 122 can avoid contact with the heat transfer tube 30 and the evaporator tube sheet 20, thereby avoiding damage to the evaporator tube sheet 20 during the tube blocking operation.

[0040] like Figures 1 to 4 As shown, the buffer bushing 2 is sleeved on the support tube 12 and located in the avoidance groove 121. The guide lubricating sleeve 3 is installed in the through hole 13, with the outer edge of the guide lubricating sleeve 3 abutting against the wall of the through hole 13. The guide lubricating sleeve 3 has a through hole 31 extending along its length. The through hole 13 is aligned with the heat transfer tube 30, and the buffer bushing 2 abuts against the evaporator tube sheet 20 and the weld 40.

[0041] As can be understood, the buffer bushing 2 functions as an isolation buffer. When the tube blocking device contacts the evaporator tube sheet 20 during use, the buffer bushing 2 reduces the impact force and protects the evaporator tube sheet 20 from damage. The buffer bushing 2 can be made of different materials, such as rubber or other elastic materials such as polyurethane, to provide different buffering effects.

[0042] The main functions of the guide lubricating sleeve 3 are lubrication and guidance. The through hole 31 allows the pipe plugging tool to pass through the guide lubricating sleeve 3 and enter the heat transfer pipe 30, while reducing the friction between the pipe plugging tool and the through hole 13, making the pipe plugging process smoother.

[0043] It should be noted that the buffer bushing 2 is sleeved on the support tube 12 and is located in the avoidance groove 121. This ensures that the buffer bushing 2 can be supported on the evaporator tube sheet 20 and the weld 40 when the support device 1 is placed on the evaporator tube sheet 20, thereby reducing the damage to the evaporator tube sheet 20 caused by the tube blocking equipment during use.

[0044] The guide lubricating sleeve 3 is positioned within the through-hole 13, with its outer periphery resting against the wall of the through-hole 13. A through-hole 31 allows the plugging tool to pass through the guide lubricating sleeve 3 and into the heat transfer tube 30, while also reducing friction between the plugging tool and the through-hole 13. The through-hole 13 is aligned with the heat transfer tube 30, ensuring that the plugging tool can accurately enter the heat transfer tube 30 for plugging. The buffer sleeve 2 and support device 1 form a tight fit, as does the guide lubricating sleeve 3 and support device 1.

[0045] It should also be noted that during actual pipe plugging, the pipe plugging device will drive the support tube 12 to a predetermined position via the mounting plate 11, so that the support tube 12 can be aligned with the heat transfer tube 30 to be plugged, thereby causing the buffer sleeve 2 to correspondingly abut against the weld 40. Because the buffer sleeve 2 can deform to a certain extent, a portion of the buffer sleeve 2 will correspondingly abut against the evaporator tube sheet 20.

[0046] In this way, the contact area between the anvil 10 of the nuclear power evaporator tube blocking device and the evaporator will be greatly increased due to the setting of the buffer bushing 2, thereby avoiding damage to the evaporator tube plate 20 due to concentrated force in a small area, and ensuring the service life of the evaporator.

[0047] Specifically, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the guide lubricating sleeve 3 includes a copper sleeve.

[0048] As you can understand, the copper sleeve has excellent self-lubricating properties, reducing friction even without additional lubricant. This is crucial for nuclear power evaporator plugging equipment, where the addition of additional lubricant can be limited in the high-temperature, high-pressure operating environment. Furthermore, the copper sleeve is highly wear-resistant, capable of withstanding the friction generated by repeated insertions of the plugging tool. This extends the service life of the guide lubricating sleeve 3 and reduces maintenance costs and downtime.

[0049] like Figures 1 to 4 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, one end of the guide lubricating sleeve 3 is flush with one end of the through hole 13 , and the length of the guide lubricating sleeve 3 is less than the length of the through hole 13 .

[0050] As can be understood, by setting the length of the guide lubricating sleeve 3 to be shorter than the length of the through hole 13, the material consumption of the guide lubricating sleeve 3 can be reduced, thereby lowering costs. Furthermore, the pipe plugging tool only needs to travel a shorter guide stroke before entering the heat transfer tube 30, reducing frictional resistance. This also facilitates replacement or maintenance of the guide lubricating sleeve 3 because its shorter length makes assembly and disassembly more convenient.

[0051] like Figures 1 to 4 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the mounting plate 11, the support tube 12 and the small diameter end 122 are an integrally formed structure.

[0052] As can be understood, the one-piece structure ensures a secure connection between the mounting plate 11, the support tube 12, and the small-diameter end 122, thereby enhancing the strength and stability of the entire support device 1. This reduces potential weak points caused by welding or other connection methods, and improves the stability and reliability of the overall structure.

[0053] like Figures 1 to 3 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the outer side wall of the buffer bushing 2 is aligned with the peripheral side wall of the support tube 12.

[0054] It can be understood that the outer side wall of the buffer sleeve 2 is aligned with the peripheral side wall of the support tube 12, which can ensure that the buffer sleeve 2 can fit tightly with the support tube 12 when the support device 1 is placed on the evaporator tube plate 20 to provide a uniform buffering effect.

[0055] Specifically, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the height of the avoidance groove 121 is 5 mm to 8.9 mm.

[0056] Specifically, the width of the avoiding groove 121 is 3.1 mm to 3.7 mm.

[0057] Specifically, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the buffer bushing 2 includes a nylon sleeve.

[0058] It is understood that the nylon sleeve made of nylon material has good wear resistance and can withstand the friction and wear generated during the pipe plugging process, thereby extending the service life of the buffer sleeve 2. At the same time, the nylon sleeve has a certain elasticity and can effectively absorb impact force, reducing damage to the evaporator tube sheet 20 during use of the pipe plugging device.

[0059] like Figure 4 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the buffer bushing 2 is annular.

[0060] It can be understood that the annular design of the buffer bushing 2 can ensure that when the support device 1 is placed on the evaporator tube sheet 20, it can evenly support the evaporator tube sheet 20 and the weld 40, providing a uniform buffering effect.

[0061] like Figure 1 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator tube blocking device, the weld 40 is annular, and the weld 40 surrounds the end of the heat transfer tube 30.

[0062] It can be understood that the annular design enables the buffer bushing 2 to evenly distribute pressure throughout the entire circumference, ensuring that the pressure of the tube blocking device on the evaporator tube plate 20 is evenly distributed during use, thereby reducing local stress concentration.

[0063] like Figure 2 and Figure 4 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator pipe blocking device, the mounting plate 11 has a chamfered surface 111 on the outer side of the peripheral edge.

[0064] It can be understood that a chamfered surface 111 is provided on the outer side of the peripheral edge of the mounting plate 11. Such a design can reduce the sharpness of the edge, facilitate installation and reduce stress concentration.

[0065] like Figure 1 As shown, in some embodiments of the anvil 10 of the nuclear power evaporator tube blocking device, the anvil 10 of the nuclear power evaporator tube blocking device further includes a plug 4, which is used to penetrate the through hole 13 and enter the heat transfer tube 30.

[0066] As can be understood, the plug 4 is used to pass through the through hole 13 of the support device 1 and enter the heat transfer tube 30 for the pipe plugging operation. The plug 4 can accurately enter the heat transfer tube 30 through the guidance of the through hole 13, ensuring the accuracy of the pipe plugging operation.

[0067] The implementation of this utility model has the following beneficial effects:

[0068] This utility model relates to an anvil for a nuclear power evaporator tube plugging device. By providing a support device with a buffer bushing, it effectively prevents damage to the evaporator tube sheet during use, thereby extending the evaporator's service life. The small-diameter end of the support tube allows the support device to be precisely aligned with the interior of the heat transfer tube, preventing the small-diameter end from abutting the evaporator tube sheet and the heat transfer tube, thereby improving the accuracy and reliability of the tube plugging operation.

[0069] Secondly, the provision of a guide lubrication sleeve can reduce friction between the pipe plugging tool and the through-hole, making the plugging process smoother and reducing operational difficulty. The provision of a buffer bushing can also reduce vibration that may occur during the plugging process to a certain extent, improving the safety of the operation.

[0070] The scheme of the present invention 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 that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description 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 sequence, 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.

[0071] While various embodiments of the present invention have been described above, the above descriptions are illustrative and non-exhaustive, and are not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An anvil for a nuclear power evaporator tube blocking device, arranged on an evaporator tube sheet, wherein a heat transfer tube is arranged on the evaporator tube sheet, and the ends of the heat transfer tubes are welded to the evaporator tube sheet, thereby forming a weld around the ends of the heat transfer tubes, characterized in that: The anvil of the nuclear power evaporator pipe blocking equipment includes: A support device, the support device comprising a mounting plate and a support tube, the support tube being disposed on the mounting plate, the support tube having a relief groove on a side away from the mounting plate, thereby forming a small-diameter end on the support tube, the outer diameter of the small-diameter end being smaller than the inner diameter of the heat transfer tube, and a through hole being disposed on the support device, the through hole penetrating the mounting plate, the support tube, and the small-diameter end; A buffer bushing, the buffer bushing is sleeved on the support tube and is located in the avoidance groove; and A guide lubricating sleeve, the guide lubricating sleeve is arranged in the through hole, the outer side of the circumference of the guide lubricating sleeve is abutted against the hole wall of the through hole, and the guide lubricating sleeve is provided with a through hole in the length extension direction; Wherein, the through hole is aligned with the heat transfer tube, and the buffer bushing is supported on the evaporator tube plate and the weld.

2. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The guide lubricating sleeve comprises a copper sleeve.

3. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1 or 2, characterized in that: One end of the guide lubricating sleeve is flush with one end of the through hole, and the length of the guide lubricating sleeve is smaller than the length of the through hole.

4. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The mounting plate, the support tube and the small-diameter end are an integrally formed structure.

5. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The outer side wall of the buffer bushing is aligned with the circumferential side wall of the support tube.

6. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1 or 5, characterized in that: The height of the avoidance groove is 5mm to 8.9mm; and / or The width of the avoidance groove is 3.1 mm to 3.7 mm.

7. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The buffer sleeve comprises a nylon sleeve; or The buffer bushing is annular.

8. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The weld is annular and surrounds the end of the heat transfer tube.

9. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The mounting plate has a chamfered surface on the outer side of the periphery.

10. The anvil for nuclear power evaporator pipe blocking equipment according to claim 1, characterized in that: The anvil of the nuclear power evaporator tube blocking device further comprises a plug, which is used to penetrate the through hole and enter the heat transfer tube.

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