CN118935111B - Fuel assembly upper portion connection dismouting integrated device and fuel assembly - Google Patents
Fuel assembly upper portion connection dismouting integrated device and fuel assemblyInfo
- Publication number
- CN118935111B CN118935111B CN202411004984.0A CN202411004984A CN118935111B CN 118935111 B CN118935111 B CN 118935111B CN 202411004984 A CN202411004984 A CN 202411004984A CN 118935111 B CN118935111 B CN 118935111B
- Authority
- CN
- China
- Prior art keywords
- telescopic
- tube seat
- disassembly
- upper tube
- connecting sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
本发明公开了一种燃料组件上部连接拆装一体化装置及燃料组件，涉及核反应领域。该一体化装置包括上管座、连接套管、圆周伸缩锁紧机构、拆卸连接件以及复位弹簧，连接套管置于圆周伸缩锁紧机构内侧壁上，连接套管与圆周伸缩锁紧机构侧壁圆周均有均匀贯穿设置的四个配合槽。本发明提供的一体化装置，拆卸时，上方伸入拆卸连接件，拆卸连接件下部设有拆卸圆筒楔形壁，拆卸圆筒的直径和连接套管的内径相等，当拆卸圆筒向下伸入时，由于两个楔形的配合，将伸缩块往外挤压，然后将上管座向上取出，实现拆卸；装配时，拆卸圆筒在连接套管内，将上管座套入连接套管，再将圆筒取出，同时复位弹簧使伸缩块径向靠拢连接套筒轴线，卡紧连接套筒与上管座。
This invention discloses an integrated device for assembling and disassembling the upper part of a fuel assembly, and the fuel assembly itself, relating to the field of nuclear reaction. The integrated device includes an upper tube seat, a connecting sleeve, a circumferential telescopic locking mechanism, a disassembly connector, and a return spring. The connecting sleeve is placed on the inner wall of the circumferential telescopic locking mechanism, and both the connecting sleeve and the side wall of the circumferential telescopic locking mechanism have four uniformly arranged through-holes. During disassembly, the disassembly connector extends from above. The lower part of the disassembly connector has a disassembly cylindrical wedge-shaped wall, the diameter of which is equal to the inner diameter of the connecting sleeve. When the disassembly cylinder extends downwards, the two wedges engage, pushing the telescopic block outwards, and then the upper tube seat is removed upwards, achieving disassembly. During assembly, the disassembly cylinder is inside the connecting sleeve. The upper tube seat is fitted into the connecting sleeve, and then the cylinder is removed. Simultaneously, the return spring causes the telescopic block to radially approach the axis of the connecting sleeve, locking the connecting sleeve and the upper tube seat together.
Description
Technical Field
The invention relates to the field of nuclear reaction, in particular to a fuel assembly upper connecting, dismounting and mounting integrated device and a fuel assembly.
Background
In the fuel assembly, a plurality of guide pipe holes are formed in the upper pipe seat in a penetrating mode, and each guide pipe hole needs to be connected with a corresponding guide pipe.
At present, a threaded connecting piece is often adopted on the market to be in threaded fit with a guide pipe hole, so that connection between an upper pipe seat and the guide pipe is established, and the upper pipe seat is difficult to assemble and disassemble due to the connection mode, and time and labor are wasted.
Disclosure of Invention
The invention aims to provide a fuel assembly upper connecting, dismounting and mounting integrated device which has the characteristic of convenient dismounting and mounting.
Another object of the present invention is to provide a fuel assembly that is easy to disassemble.
The invention provides a technical scheme that:
The utility model provides a fuel assembly upper portion connects dismouting integrated device, including the upper tube seat, the adapter sleeve, circumference flexible locking mechanism, dismantle connecting piece and reset spring, the adapter sleeve is arranged in on the circumference flexible locking mechanism inside wall, the adapter sleeve is all had four mating grooves of evenly running through setting with circumference flexible locking mechanism lateral wall circumference, be adapter sleeve mating groove and flexible piece mating groove respectively, circumference flexible locking mechanism opens there are two spring embedding grooves along the circumferencial direction, spring embedding groove circumference runs through the recess and locates between four flexible piece mating grooves, after adapter sleeve and circumference flexible locking mechanism overlap, four flexible pieces are arranged in adapter sleeve mating groove and flexible piece mating groove respectively simultaneously, flexible piece one side transversely concave be equipped with two flexible piece spring embedding grooves, both ends are equipped with flexible piece wedge wall respectively about the opposite side, the upper tube seat is arranged in circumference flexible locking mechanism lateral wall on, during the dismantlement, the top stretches into the dismantlement connecting piece lower part is equipped with and dismantles the drum wedge wall, the diameter adapter sleeve of dismantlement drum and the inside diameter of pipe are equal, when dismantling the drum and stretching down, because two wedge cooperation, press the flexible piece outwards, then with flexible piece, take out and dismantle the upper sleeve, take out and radial sleeve is connected the sleeve in the telescopic tube, when connecting sleeve is connected, the telescopic tube is connected in the radial sleeve is drawn together, the telescopic tube is connected in the sleeve of the side of being drawn.
Further, the number of the telescopic block matching grooves is four, and the four telescopic block matching grooves are uniformly and penetratingly distributed on the side wall of the circumferential telescopic locking mechanism;
the number of the connecting sleeve matching grooves is four, and the four connecting sleeve matching grooves are uniformly distributed on the side wall of the connecting sleeve in a penetrating way.
Further, two telescopic block spring embedding grooves are transversely concavely formed in one side of the telescopic block, telescopic block wedge-shaped walls are respectively arranged at the upper end and the lower end of the other side of the telescopic block, and the telescopic blocks are used for being correspondingly matched with the connecting sleeve matching grooves and the telescopic block matching grooves respectively.
Further, the circumference telescopic locking mechanism comprises a telescopic locking boss, a spring embedding groove, a telescopic block matching groove and a telescopic locking cylinder, wherein the telescopic locking boss is attached to an upper cavity of an upper tube seat of the upper tube seat, and the inner diameter of the telescopic locking cylinder is equal to the outer diameter of the connecting sleeve and smaller than the inner diameter of the telescopic locking boss;
the inner diameter of the connecting sleeve is equal to the inner diameter of the telescopic locking boss.
Further, the upper tube seat comprises an upper tube seat upper cavity, an upper tube seat connecting cavity, an upper tube seat lower cavity and an upper tube seat bottom hole, the inner diameter of the upper tube seat upper cavity is equal to the outer diameter of the telescopic locking boss and is larger than the outer diameter of the telescopic locking tube, the upper surface of the upper tube seat upper cavity is flush with the upper surface of the telescopic locking boss, the lower surface of the upper tube seat upper cavity is flush with the lower surface of the telescopic locking boss, the inner diameter of the upper tube seat connecting cavity is equal to the outer diameter of the telescopic locking tube, the inner diameter of the upper tube seat lower cavity is larger than the outer diameter of the telescopic locking tube, the radius difference of the upper tube seat upper cavity is larger than the outer diameter of the connecting sleeve.
Further, the disassembly connecting piece comprises a disassembly connecting inner cylinder, a bolt hole, a disassembly supporting table and a disassembly cylinder, wherein the bolt hole is used for fixedly connecting the disassembly connecting piece with the upper connecting rod, the outer diameter of the disassembly supporting table is larger than the inner diameter of the telescopic locking boss, and the outer diameter of the disassembly cylinder is equal to the inner diameter of the connecting sleeve.
Further, the chamfer of the end part of the disassembly cylinder is a wedge-shaped wall of the disassembly cylinder, and the wedge angle of the wedge-shaped wall of the disassembly cylinder is the same as that of the wedge-shaped wall of the telescopic block.
Further, the return spring is in a stretching state after being embedded into the spring embedding groove, and continuously applies a radial force to the telescopic block, so that the telescopic block radially closes the axis of the connecting sleeve during return, and the connecting sleeve and the upper tube seat are clamped.
Further, after the circumferential telescopic locking mechanism is assembled to the upper tube seat, the circumferential telescopic locking mechanism is welded to the upper tube seat, so that the circumferential telescopic locking mechanism and the upper tube seat are integrated, the circumferential telescopic locking mechanism is prevented from moving axially, and other operations are not needed after one-time assembly is completed.
The invention also provides a fuel assembly, which comprises the fuel assembly upper part connection and disassembly integrated device, wherein the fuel assembly upper part connection and disassembly integrated device comprises an upper tube seat, a connecting sleeve, a circumference telescopic locking mechanism, a disassembly connecting piece and a reset spring, the connecting sleeve is arranged on the inner side wall of the circumference telescopic locking mechanism, four matching grooves which are uniformly and penetratingly arranged are respectively arranged on the circumferences of the connecting sleeve and the side wall of the circumference telescopic locking mechanism, the connecting sleeve matching grooves and the telescopic block matching grooves are respectively arranged, two spring embedding grooves are circumferentially and penetratingly arranged between the four telescopic block matching grooves along the circumferential direction of the circumference telescopic locking mechanism, after the connecting sleeve is sleeved with the circumference telescopic locking mechanism, the four telescopic blocks are respectively and simultaneously arranged in the connecting sleeve matching grooves and the telescopic block matching grooves, two telescopic block spring embedding grooves are transversely concavely arranged on one side of the telescopic blocks, the upper end and the lower end of the other side of the telescopic block are respectively provided with telescopic block wedge walls, and the upper tube seat is arranged on the outer side wall of the circumference telescopic locking mechanism.
Compared with the prior art, the upper part of the fuel assembly is connected with the integrated device for disassembly, when the fuel assembly is disassembled, the upper part of the fuel assembly stretches into the disassembly connecting piece, the lower part of the disassembly connecting piece is provided with the wedge-shaped wall of the disassembly cylinder, the diameter of the disassembly cylinder is equal to the inner diameter of the connecting sleeve, when the disassembly cylinder stretches downwards, the telescopic block is extruded outwards due to the cooperation of the two wedges, and then the upper tube seat is taken out upwards, so that the disassembly is realized. When the telescopic connecting sleeve is assembled, the cylinder is disassembled and arranged in the connecting sleeve, the upper tube seat is sleeved into the connecting sleeve, the cylinder is taken out, and meanwhile, the telescopic blocks radially close to the axis of the connecting sleeve by the reset spring, so that the connecting sleeve and the upper tube seat are clamped.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.
FIG. 1 is a schematic view of a fuel assembly upper connection disassembly integrated device according to an embodiment of the present invention;
FIG. 2 is an exploded view of an integrated device for attaching and detaching an upper portion of a fuel assembly according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the upper header of FIG. 2;
FIG. 4 is a schematic view of the connection structure of the circumferential expansion locking mechanism, expansion blocks and return springs in FIG. 2;
FIG. 5 is a schematic view of the connecting sleeve of FIG. 2;
FIG. 6 is a schematic view of the structure of the expansion block in FIG. 2;
Fig. 7 is a schematic view of the detachable connection member in fig. 2.
The icons are 100-dismantlement connectors, 101-dismantlement cylinders, 1011-dismantlement cylinder wedge wall, 102-dismantlement abutment, 103-dismantlement connection inner cylinder, 1031-bolt hole, 200-circumference telescopic locking mechanism, 201-spring embedding groove (up), 202-spring embedding groove (down), 203-telescopic locking boss, 204-telescopic locking cylinder, 205-telescopic block matching groove, 300-return spring, 400-connection sleeve, 401-connection sleeve matching groove, 500-upper tube seat, 501-upper tube seat upper cavity, 502-upper tube seat connection cavity, 503-upper tube seat lower cavity, 504-upper tube seat bottom hole, 600-telescopic block, 601-telescopic block wedge wall, 602-telescopic block spring embedding groove (up), 603-telescopic block spring embedding groove (down).
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are mainly embodiments of the connection and corresponding disconnection operations, and are some, but not all, embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific use direction, must be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, may be a mechanical connection or an electrical connection, may be a direct connection, may be an indirect connection via an intermediary, or may be a communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes specific embodiments of the present invention in detail with reference to the drawings.
Examples
Referring to fig. 1 to 2 in combination, fig. 1 is a schematic structural diagram of an integrated device for connecting and dismounting an upper portion of a fuel assembly, and fig. 2 is an exploded schematic diagram of an integrated device for connecting and dismounting an upper portion of a fuel assembly.
The fuel assembly upper connecting, dismounting and mounting integrated device provided by the embodiment comprises a dismounting connecting piece 100, a circumference telescopic locking mechanism 200, a return spring 300, a connecting sleeve 400, an upper tube seat 500 and a telescopic block 600. The return spring 300 is wrapped in the spring-fitting groove (upper) 201 and the spring-fitting groove (lower) 202 of the circumferential expansion lock mechanism 200 to which the expansion lock cylinder 204 is connected. The upper stem 500 is provided with an upper stem upper chamber 501, an upper stem connecting chamber 502, and an upper stem lower chamber 503 extending in the axial direction, respectively. The upper tube seat upper cavity 501 and the upper tube seat connecting cavity 502 are used for directly welding the circumference telescopic locking mechanism 200 on the upper tube seat 500 and integrally manufacturing the circumference telescopic locking mechanism 200 and the upper tube seat 500 after the circumference telescopic locking mechanism 200 is assembled, so as to prevent the circumference telescopic locking mechanism 200 from moving axially, and the upper tube seat lower cavity 503 is used for providing telescopic space for the telescopic block 600, is a cavity when connected and is filled when disassembled, and is extruded outwards so as to take out the upper tube seat 500 upwards. The circumferential telescopic locking mechanism 200 mainly includes a telescopic locking cylinder 204, a telescopic block 600 and a return spring 300. The telescopic locking cylinder 204 is provided with four telescopic block matching grooves 205 which are respectively matched with four telescopic blocks 600, and the telescopic blocks 600 can be radially telescopic to realize the diameter change. The telescopic locking cylinder 204 and the telescopic block 600 are provided with two coordination grooves in the circumferential direction, and are respectively connected with the upper and lower side reset springs 300, and the reset springs 300 play a role in radial reset after the diameter of the telescopic block 600 is changed. Four connecting sleeve matching grooves 401 on the connecting sleeve 400 are matched with four telescopic blocks 600, and the connecting sleeve 400 stretches into the circumference telescopic locking mechanism 200 to realize locking. The detachment cylinder wedge wall 1011 of the detachment cylinder 101 at the lowest part of the detachment connection member 100 is matched with the expansion block wedge wall 601 of the expansion block 600, the diameter of the detachment cylinder 101 is as large as the inner diameter of the connection sleeve 400, the detachment cylinder 101 extends into the connection sleeve 400, the matched detachment cylinder wedge wall 1011 presses the expansion block 600 outwards, and the upper tube seat 500 is taken out, so that the detachment is completed.
In practical application, the circumferential telescopic locking mechanism 200 is integrated, no additional operation is needed after one assembly is completed, and after the circumferential telescopic locking mechanism 200 is assembled to the upper tube seat 500, the circumferential telescopic locking mechanism 200 is directly welded to the upper tube seat 500 and integrated with the upper tube seat 500, so that the circumferential telescopic locking mechanism 200 cannot shift in the axial direction, and the connection is firmer. Also, the upper tube holder 500 is removed upward together with the disassembly, and separated from the connection sleeve 400. It is here in fact that the four telescopic blocks 600 are separated from the connection sleeve 400.
When the telescopic block 600 is matched, one side of the wedge-shaped wall 601 of the telescopic block faces the inside of the circumferential telescopic locking mechanism 200, the opposite side faces the upper tube seat connecting cavity 502, and the outer side is always tangent to the telescopic locking cylinder 204 under the action of the return spring 300. The thickness of the telescopic block 600 is larger than the wall thickness of the telescopic locking cylinder 204, the connecting sleeve 400 stretches into the connecting sleeve matching groove 401 after being aligned with the telescopic block 600, and the connecting sleeve matching groove 401 is matched with the wedge-shaped wall 601 of the telescopic block and the rest part of the telescopic block 600 is matched with the telescopic locking cylinder 204, so that the shrinkage is completed. The connection sleeve 400 and the lower guide pipe are connected to the lower socket by bolts, so that the connection between the upper socket 500 and the lower socket is achieved as a whole.
When the upper tube holder 500 is to be disassembled, the operation can be realized by simply extending and lifting the upper tube holder by using a simple disassembling tool. When dismantling, the extracting tool that the operator used is a dismantlement drum 101, dismantles drum 101 bottom and is can with telescopic block wedge wall 601 matched with dismantlement drum wedge wall 1011, the diameter of dismantlement drum 101 is unanimous with the internal diameter of flexible locking section of thick bamboo 204, through clearance fit, in the in-process of going deep down, because telescopic block wedge wall 601 and dismantlement drum wedge wall 1011's cooperation, outwards extrudees telescopic block 600, telescopic block 600 accomplishes the flexible in radial, realizes the change of diameter, proposes up upper tube seat 500 at this moment, just can accomplish the dismantlement. After the extraction, the extruded telescopic block 600 is restored to the original tangential state with the telescopic locking cylinder 204 by the action of the restoring spring 300.
Compared with the prior art that the threaded connection piece is in threaded fit with the upper tube seat 500, the upper tube seat 500 is not required to be rotated to a specific angle during the disassembly and the installation of the upper tube seat 500, and other actions are not required after the connecting sleeve 400 stretches in, and only the connecting sleeve matching groove 401 is required to be aligned with the telescopic block 600 and radial force is applied to push the connecting sleeve 400 into the telescopic locking cylinder 204. The disassembly cylinder 101 is only required to be axially overlapped and extend into the telescopic locking cylinder 204 to be lifted during disassembly, and other complicated operations are not required.
Referring to fig. 3 and fig. 4 in combination, fig. 3 is a schematic cross-sectional view of the upper tube seat, and fig. 4 is a schematic connecting structure of the circumferential telescopic locking mechanism, the telescopic block and the return spring.
In this embodiment, an upper stem upper cavity 501, an upper stem connection cavity 502 and an upper stem lower cavity 503 which are coaxial are provided in the upper stem 500. The upper tube seat upper cavity 501 and the upper tube seat connecting cavity 502 are tightly matched with the outer walls of the telescopic locking lug 203 and the telescopic locking cylinder 204 of the circumference telescopic locking mechanism 200, and an upper tube seat bottom hole 504 with the diameter smaller than that of the telescopic locking cylinder 204 is arranged below the upper tube seat 500 and used for bearing the telescopic locking cylinder 204.
In practical application, the upper tube seat 500 and the circumferential telescopic locking mechanism 200 are welded into a whole after the first matching, which not only fastens the matching, but also simplifies a plurality of operation steps of connection and disassembly. To ensure accurate disassembly, the reserved amount of the lower cavity 503 of the upper tube seat is larger than the actual calculated amount. During the disassembly process, the wedge-shaped wall 601 of the telescopic block 600 is extruded in the moving process of the telescopic block, the radial movement realizes axial expansion and contraction, the diameter change is completed, the telescopic block 600 protrudes and remains in the lower cavity 503 of the upper tube seat, and the separation from the connecting sleeve 400 is completed. The thickness of the connection sleeve 400 should not be too great and should be less than the frontal projected width of the tapered wall 601 of the telescopic block so that the separation from the connection sleeve 400 can be accomplished when the upper socket 500 is lifted upward.
The nominal diameter of the disassembly cylinder 101 is matched with the nominal diameter of the inner diameter of the connecting sleeve 400, and the telescopic block 600 is in clearance fit with the circumferential telescopic locking mechanism 200 and the telescopic block 600 is in clearance fit with the connecting sleeve 400 by adopting interference fit.
Referring to fig. 5 in combination, fig. 5 is a schematic structural diagram of the connection sleeve.
In order to achieve locking and disassembly of the upper tube socket 500, the connection sleeve 400 is correspondingly designed with a corresponding structure. The connecting sleeve 400 only needs to be provided with four connecting sleeve matching grooves 401 at the positions corresponding to the four telescopic blocks 600, and the four connecting sleeve matching grooves are axially overlapped with the telescopic locking cylinder 204 during matching, and are aligned with the four telescopic blocks 600 and extend upwards until the telescopic blocks 600 are clamped with the connecting sleeve 400, and the upper tube seat 500 and the lower tube seat are correspondingly fastened.
In order to prevent the case that the connection sleeve 400 cannot pass through the upper tube holder 500, the connection sleeve 400 is tightly engaged with the circumferential expansion locking mechanism 200 by a clearance fit in consideration of multiple disassembly and assembly.
The return spring 300 is a part of the entire circumferential expansion lock mechanism 200, and is mainly used for resetting the expansion block 600. The return springs 300 are provided with an upper return spring and a lower return spring which are symmetrically distributed, so that the telescopic block 600 and the circumference telescopic locking mechanism 200 are integrally tangent without dislocation. The return spring 300 and the expansion block spring embedding groove (upper) 602, the expansion block spring embedding groove (lower) 603 and the spring embedding groove (upper) 201, and the spring embedding groove (lower) 202 are arranged in the mechanism, so that the external size of the whole mechanism is not affected, and the mechanism cannot slide on the outer wall of the expansion locking cylinder 204 at will.
In this example, the return spring 300 has a strict preload requirement and sufficient retraction force to return the protruding telescopic block 600 back to the original state tangential to the telescopic lock cylinder 204. At the same time, the tightening force should not be excessive, so that the telescopic block 600 is prevented from being excessively stressed and separated from the circumferential telescopic locking mechanism 200 during instantaneous retraction.
Referring to fig. 6 and fig. 7 in combination, fig. 6 is a schematic structural view of the telescopic block, and fig. 7 is a schematic structural view of the detachable connection piece.
The dismounting connection 100 is a dismounting cylinder 101, the lower end of which is a dismounting cylinder wedge wall 1011 cooperating with the telescopic block 600. When the detachable cylinder 101 is detached, the detachable cylinder is only required to extend in, the telescopic block 600 of the buckle is matched and separated with the connecting sleeve 400 through extrusion, and the upper tube seat 500 is lifted up to realize separation. When assembling, because the disassembling cylinder 101 is arranged in the connecting sleeve 400, the upper tube seat 500 is sleeved into the connecting sleeve 400 after aligning, and then the disassembling cylinder 101 is taken out, so that the operation is convenient. The dismounting connection piece 100 further comprises a dismounting connection inner cylinder 103 and a dismounting abutment 102, wherein the outer diameter of the dismounting abutment 102 is larger than the inner diameter of the telescopic locking boss 203. The detachable connection inner cylinder 103 is provided with a bolt hole 1031.
To sum up, the fuel assembly upper portion connection dismouting integrated device that this embodiment provided, upper tube seat 500 can be firmly connected with adapter sleeve 400 and can dismantle simple fast simultaneously, and simple structure labour saving and time saving is very high-efficient.
In addition, the embodiment provides a fuel assembly of a nuclear reactor which is convenient to connect, disassemble and assemble, and comprises the upper connecting, disassembling and assembling integrated device. Therefore, the fuel assembly has the characteristics of simple connection, fastening and disassembly.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The integrated device for connecting, dismounting and integrating the upper part of the fuel assembly is characterized by comprising an upper tube seat, a connecting sleeve, a circumference telescopic locking mechanism, a dismounting connecting piece and a reset spring, wherein the connecting sleeve is arranged on the inner side wall of the circumference telescopic locking mechanism, four matching grooves which are uniformly and penetratingly arranged are respectively arranged on the circumferences of the connecting sleeve and the side wall of the circumference telescopic locking mechanism, two spring embedding grooves are respectively arranged on the circumference telescopic locking mechanism along the circumferential direction, the circumference of the spring embedding groove is penetrated and concavely arranged between the four telescopic block matching grooves, after the connecting sleeve is sleeved with the circumference telescopic locking mechanism, the four telescopic blocks are respectively and simultaneously arranged in the connecting sleeve matching groove and the telescopic block matching groove, two telescopic block spring embedding grooves are transversely concavely arranged on one side of the telescopic block, the upper end and the lower end of the other side of the telescopic block are respectively provided with a telescopic block wedge-shaped wall, and the upper pipe seat is arranged on the outer side wall of the circumference telescopic locking mechanism;
the upper tube seat comprises an upper tube seat upper cavity, an upper tube seat connecting cavity, an upper tube seat lower cavity and an upper tube seat bottom hole;
after the circumference telescopic locking mechanism is assembled to the upper tube seat, the circumference telescopic locking mechanism is welded on the upper tube seat, so that the circumference telescopic locking mechanism and the upper tube seat are integrated, and the circumference telescopic locking mechanism is prevented from moving in the axial direction;
When the disassembly cylinder is downward extended, the telescopic block is outwards extruded due to the cooperation of the disassembly cylinder wedge wall and the telescopic block wedge wall, and then the upper tube seat is upwards taken out to realize disassembly;
During assembly, the disassembly cylinder is arranged in the connecting sleeve, the upper tube seat is sleeved into the connecting sleeve, the disassembly cylinder is taken out, and meanwhile, the reset spring enables the telescopic blocks to radially close to the axis of the connecting sleeve, and the connecting sleeve and the upper tube seat are clamped.
2. The integrated device for connecting, dismounting and mounting the upper part of the fuel assembly according to claim 1, wherein the circumferential telescopic locking mechanism comprises a telescopic locking boss, a spring embedding groove, a telescopic block matching groove and a telescopic locking cylinder, the telescopic locking boss is attached to an upper cavity of an upper tube seat, and the inner diameter of the telescopic locking cylinder is equal to the outer diameter of the connecting sleeve and smaller than the inner diameter of the telescopic locking boss;
the inner diameter of the connecting sleeve is equal to the inner diameter of the telescopic locking boss.
3. The fuel assembly upper portion connection disassembly and assembly integrated device according to claim 2, wherein the inner diameter of the upper tube seat upper cavity is equal to the outer diameter of the telescopic locking boss and is larger than the outer diameter of the telescopic locking barrel, the upper tube seat upper cavity upper surface is flush with the upper surface of the telescopic locking boss, the upper tube seat upper cavity lower surface is flush with the lower surface of the telescopic locking boss, the inner diameter of the upper tube seat connecting cavity is equal to the outer diameter of the telescopic locking barrel, the inner diameter of the upper tube seat lower cavity is larger than the outer diameter of the telescopic locking barrel, the radius difference is larger than the thickness of the telescopic block, and the diameter of the upper tube seat bottom hole is larger than the outer diameter of the connecting sleeve.
4. The fuel assembly upper connection disassembly integrated device of claim 2, wherein the disassembly connection piece comprises a disassembly connection inner cylinder, a bolt hole, a disassembly abutment and a disassembly cylinder, the bolt hole fixedly connects the disassembly connection piece with the upper connection rod, the outer diameter of the disassembly abutment is larger than the inner diameter of the telescopic locking boss, and the outer diameter of the disassembly cylinder is equal to the inner diameter of the connection sleeve.
5. The fuel assembly upper attachment disassembly integration apparatus of claim 4, wherein the disassembly cylinder wedge wall has the same wedge angle as the expansion block wedge wall.
6. The integrated device for connecting, dismounting and mounting the upper portion of the fuel assembly according to claim 1, wherein the return spring is in a stretched state after being inserted into the spring insertion groove, and continuously applies a radial force to the telescopic block, so that the telescopic block radially closes the axis of the connecting sleeve during resetting, and clamps the connecting sleeve and the upper tube seat.
7. A fuel assembly comprising the fuel assembly upper attachment and detachment integration apparatus of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411004984.0A CN118935111B (en) | 2024-07-25 | 2024-07-25 | Fuel assembly upper portion connection dismouting integrated device and fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411004984.0A CN118935111B (en) | 2024-07-25 | 2024-07-25 | Fuel assembly upper portion connection dismouting integrated device and fuel assembly |
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| CN107610785A (en) * | 2017-08-16 | 2018-01-19 | 中广核研究院有限公司 | Guide pipe and the quick releasable connection device and method of upper base |
| CN116580859A (en) * | 2023-06-13 | 2023-08-11 | 四川大学 | Quickly detachable connection structure and disassembly method of separate fuel assembly |
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| CN107068208A (en) * | 2017-02-27 | 2017-08-18 | 中国核动力研究设计院 | Portion connecting structure and its mounting and dismounting method on a kind of quick removable fuel assembly |
| CN208117734U (en) * | 2018-04-28 | 2018-11-20 | 四川欧航科技有限责任公司 | A kind of extracting tool of aircraft fuel oil component slide valve bush |
| CN110681128A (en) * | 2019-09-24 | 2020-01-14 | 宁海兴达旅游用品有限公司 | Locking mechanism of folding rod and rod stick thereof |
| CN212537220U (en) * | 2020-05-18 | 2021-02-12 | 天津九晟机械设备制造有限公司 | Separator installing support with adjustable height |
| CN213871530U (en) * | 2020-11-05 | 2021-08-03 | 季英国 | Mud jacking sealing device of concrete box girder prestress wire passageway |
| CN220044216U (en) * | 2023-05-12 | 2023-11-21 | 厦门大字工贸有限公司 | Quick-change connector for telescopic end of telescopic rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107610785A (en) * | 2017-08-16 | 2018-01-19 | 中广核研究院有限公司 | Guide pipe and the quick releasable connection device and method of upper base |
| CN116580859A (en) * | 2023-06-13 | 2023-08-11 | 四川大学 | Quickly detachable connection structure and disassembly method of separate fuel assembly |
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