WO2020107183A1 - 燃料组件运输容器及其底部密封装置 - Google Patents

燃料组件运输容器及其底部密封装置 Download PDF

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Publication number
WO2020107183A1
WO2020107183A1 PCT/CN2018/117530 CN2018117530W WO2020107183A1 WO 2020107183 A1 WO2020107183 A1 WO 2020107183A1 CN 2018117530 W CN2018117530 W CN 2018117530W WO 2020107183 A1 WO2020107183 A1 WO 2020107183A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
fuel assembly
lower cover
transport container
clamping member
Prior art date
Application number
PCT/CN2018/117530
Other languages
English (en)
French (fr)
Inventor
吴腾
于久州
刘广
吴涛
王超
李其朋
王弟东
张春艳
许骏翔
Original Assignee
中广核研究院有限公司
中国广核集团有限公司
中国广核电力股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中广核研究院有限公司, 中国广核集团有限公司, 中国广核电力股份有限公司 filed Critical 中广核研究院有限公司
Priority to CN201880058240.3A priority Critical patent/CN111095435B/zh
Priority to PCT/CN2018/117530 priority patent/WO2020107183A1/zh
Publication of WO2020107183A1 publication Critical patent/WO2020107183A1/zh

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
    • G21F5/008—Containers for fuel elements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/08—Shock-absorbers, e.g. impact buffers for containers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/12—Closures for containers; Sealing arrangements
    • 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

Definitions

  • the present invention relates to the field of nuclear power, and more particularly, to a fuel assembly transportation container and a bottom sealing device.
  • the closed bottom plate of the compartment of the transport container for nuclear fuel assemblies has a notch on its outer edge, and in the closed position of the end plate of the door, the door and the protruding pin are inserted into the notch;
  • the end face of the fuel assembly compartment closed by the bottom closure plate has an adjustable member that holds the fuel assembly in the longitudinal direction of the container.
  • An oblong through hole is opened at the outer end of the closing plate, which weakens the strength of the closing plate;
  • the outer end of the closed plate has a sunken groove surface, the processing technology is cumbersome, and the processing accuracy is difficult to guarantee;
  • the outer edge of the closed plate is a straight edge section, and the force is uneven under impact conditions.
  • the technical problem to be solved by the present invention is to provide a fuel assembly transport container and its bottom sealing device.
  • the technical solution adopted by the present invention to solve its technical problem is to construct a bottom sealing device for a fuel assembly transportation container, including a lower cover body for sealing the bottom of the transportation container, and a lower cover body installed on the lower cover body Clamping device
  • the clamping device includes a clamping mechanism and an operating mechanism.
  • the clamping mechanism includes at least an inner side of the lower cover and a reciprocable movement along a side of the lower cover at a clamping position and a release position A clamping piece;
  • the operation mechanism includes an operation portion for driving the clamping member to the clamping position, and when the clamping member is in the clamping position, it clamps the lower tube seat of the fuel assembly in the transport container .
  • the operation mechanism includes a cam disk, the cam disk is rotatably disposed on one side of the lower cover, and the cam disk and the clamping member are located on the same side of the lower cover;
  • the edge of the cam disk is provided with a protrusion protruding outward, and the clamping member is located on the outer ring of the cam disk, so that when the operation portion drives the cam disk to rotate, the protrusion drives the card The tightening member moves toward the clamping position.
  • a plurality of protrusions are distributed on the edge of the cam disk in the circumferential direction, and the clamping members are distributed on the outer ring of the cam piece in the circumferential direction and correspond to the positions of the protrusions;
  • the clamping device further includes a plurality of reset members that respectively abut against the clamping members, and the reset member provides the clamping member with an elastic force to move toward the release position.
  • the operation mechanism includes a joystick rotatably penetrating the lower cover, and the cam plate is installed at one end of the joystick;
  • the other end of the joystick is provided with the operation portion for driving the joystick to rotate after the tool is installed, and driving the cam disk to rotate when the joystick is rotated.
  • an end of the joystick for mounting the cam disc is provided with a key slot, a key is installed in the key slot, and a cam slot is formed on the cam disc to be engaged with the key.
  • the operating mechanism further includes a backing plate, the clamping member and the cam plate are disposed on a side of the backing plate opposite to the lower cover body, the backing plate may be close to or far from the lower cover ⁇ Body movement.
  • the operation mechanism further includes a tightening screw, the tightening screw is a hollow structure, the tightening screw is screwed to the lower cover, and the joystick penetrates the tightening screw;
  • the backing plate is installed at the end of the tightening screw, and the tightening screw rotates on the lower cover body to adjust the axial position to drive the backing plate and clamping member closer to or away from the lower cover body.
  • the clamping mechanism further includes a baffle covering the clamping member, and the baffle is provided with a bayonet for the clamping member to extend after moving toward the clamping position.
  • the baffle is connected to the backing plate, and the clamping member is located in a space formed by assembling the baffle and the backing plate.
  • a fuel assembly transportation container includes the bottom sealing device.
  • the fuel assembly transport container and the bottom sealing device embodying the present invention have the following beneficial effects: the clamping device is installed on the lower cover body, ensuring the integrity of the edge of the lower cover body, solving the sealing problem of the fuel assembly compartment, and ensuring the fuel The tightness of the cabin during the transportation of the module.
  • the arc-shaped structure of the outer edge of the lower cover improves safety, the fastening device is easy to operate, improves reliability, and ensures the fastening of the fuel assembly base, so that the lower cover body is more uniformly stressed under the impact state.
  • the clamping device can clamp the lower tube seat of the loaded fuel assembly, so that the fuel assembly is more stable during transportation.
  • FIG. 1 is a schematic perspective structural view of a fuel assembly transport container in an embodiment of the present invention
  • FIG. 2 is a schematic structural view of the support assembly of the fuel assembly transport container in FIG. 1 when standing up;
  • FIG. 3 is a schematic diagram of the upper case in FIG. 1 after opening
  • FIG. 4 is an exploded schematic view of the fuel assembly transport container in FIG. 1;
  • FIG. 5 is a schematic cross-sectional view of the support assembly in FIG. 1;
  • FIG. 6 is a schematic cross-sectional view of the buffer member of the buffer structure in FIG. 5;
  • FIG. 7 is a schematic diagram of a cover plate of the support assembly in FIG. 4 when turned over;
  • FIG. 8 is a schematic cross-sectional view of the support assembly in FIG. 4;
  • FIG. 9 is a schematic cross-sectional view of the outer cover plate and the assembly on the outer cover plate in FIG. 8;
  • FIG. 10 is a perspective schematic view of the lower end cover in FIG. 4;
  • FIG. 11 is a schematic cross-sectional view of the lower end cover in FIG. 10;
  • FIG. 12 is a schematic perspective view of the baffle in FIG. 11 when opened;
  • FIG. 13 is a perspective schematic view of the upper end cover in FIG. 4.
  • a fuel assembly transport container in a preferred embodiment of the present invention includes a housing 1 and a support structure 2 disposed in the housing 1.
  • the support structure 2 includes a carrier 21 and a support assembly 22.
  • the carrier 21 is installed inside the housing 1, and the support assembly 22 is installed on the carrier 21.
  • Two support chambers 4 for accommodating and fixing the fuel assembly 3 are formed in the support assembly 22.
  • the fuel assembly 3 is usually a columnar structure.
  • the support assembly 22 can drive the fuel assembly 3 in the chamber 4 to be placed horizontally or erected.
  • the other end of the support assembly 22 is provided with a loading and unloading port 221.
  • the loading and unloading port 221 is located at the upper end of the chamber 4 for the fuel assembly 3 to be inserted into the chamber 4 from the loading and unloading port 221 in the axial direction, or from the chamber 4 Pull out the loading and unloading port 221 in the axial direction.
  • the end opposite to the loading and unloading port 221 in the chamber 4 is provided with a lower end cover 225 for positioning the fuel assembly 3 circumferentially.
  • the loading and unloading port 221 is provided with a cover for the chamber 4 and axial positioning of the fuel assembly 3 in the chamber 4 ⁇ 222.
  • the support assembly 22 can be rotated in a horizontal state and a vertical state under the action of a crane. When the support assembly 22 is in a vertical state, it is convenient to hang the fuel assembly 3 vertically into the cavity 4 and to facilitate the installation of the fuel assembly 3 The support assembly 22 rotates to a horizontal state.
  • the loading process of the fuel assembly 3 is simpler and faster, and the loading efficiency is improved. After the support assembly 22 and the fuel assembly 3 are placed horizontally at the same time, they are accommodated in the transport container, which can facilitate the transportation of the fuel assembly 3.
  • the fuel assembly 3 After the fuel assembly 3 is placed in the cavity 4 and before the upper end cap 222 is closed, the fuel assembly 3 is positioned circumferentially, preventing rotation in the cavity 4. After capping the upper end cap 222, the fuel assembly 3 can be axially positioned again to prevent longitudinal movement in the cavity 4 to achieve full restraint of the fuel assembly 3 and prevent shaking in the cavity 4 during transportation to improve transportation. Safety and stability.
  • the housing 1 includes a lower housing 11 and an upper housing 12 installed on the upper side of the lower housing 11.
  • the lower housing 11 and the upper housing 12 are assembled to form a columnar structure with a horizontal axis arranged for easy loading
  • the columnar structure is an octagonal column shape.
  • the outer shape of the housing 1 may also be a square columnar structure with a horizontal axis.
  • the side walls of the lower shell 11 and the upper shell 12 are both double-layer structures with hollow interlayers, which allows the outer shell to have high impact strength and excellent thermal insulation, shock absorption, and decontamination performance.
  • the upper housing 12 includes an upper outer shell 122, an upper inner shell 123, and upper end plates 124 disposed at both ends.
  • the upper outer shell 122 and the upper inner shell 123 are spaced apart from each other to form a double-layer structure with a hollow interlayer .
  • the lower shell 11 includes a lower outer shell 112, a lower inner shell 113, and lower end plates 114 provided at both ends.
  • the lower outer shell 112 and the lower inner shell 113 are spaced from each other to form a double-layer structure with a hollow interlayer.
  • the double-layer structure is filled with heat-insulation and shock-absorbing materials, which can effectively reduce the impact of the vibration and external impact on the components in the container when the container is dropped, and at the same time reduce the conduction of heat to the inside of the shell during fire conditions.
  • the heat-insulation and shock-absorbing materials can be formed and filled into the polygonal double-layer structure of the upper shell and the lower shell, which is small and easy to replace; at the same time, multiple sets of fuel assemblies can be contained in the container.
  • reinforcing ribs 13 are provided between the upper outer shell 122 and the upper inner shell 123, and between the lower outer shell 112 and the lower inner shell 113, which can enhance the strength of the outer shell 1 and prevent deformation during lifting and transportation. Improve the ability to resist impact.
  • the two ends of the upper casing 12 are provided with tabs 121 protruding from the side of the lower casing 11, and the inner end of the lower casing 11 is provided with A card slot 111 into which the card tongue 121 snaps.
  • the tab 121 includes a steel plate and a cork wrapped around the steel plate, which can not only ensure the strength, but also play a role in buffering and damping.
  • the tab 121 is snapped into the slot 111 to facilitate positioning between the two.
  • the outer shapes of the end surfaces of the lower shell 11 and the upper shell 12 are polygonal, and an octagonal structure is formed after assembly.
  • the adjacent sides of the lower shell 11 and the upper shell 12 are respectively provided with a lower shell 11 and an upper shell 12 Flanges connected to each other.
  • the edges of the upper casing 12 and the lower casing 11 are respectively provided with flange edges, which can lock and fix the upper casing 12 and the lower casing 11.
  • Both ends of the upper casing 12 are provided with a hoisting structure for hoisting, and the hoisting structure is provided with a first hoisting hole 125.
  • the lower side of the lower case 11 is provided with legs, and the legs are provided with first hoisting holes 115 for hoisting.
  • the lower side of the lower case 11 is also provided with a forklift hole 116 for supporting the forklift after insertion. There are multiple lifting methods of lifting holes and forklift holes 116 to make lifting more convenient.
  • a buffer structure 14 elastically connected to the lower housing 11 is provided on the side of the carrier 21, so that the carrier 21 is suspended in the lower housing 11, and the suspension and elastic connection can be Reduce the external impact on the carrier 21.
  • the buffer structure 14 can absorb the impact transmitted by the outer shell 1 to the carrier 21 and avoid impact on the fuel assembly 3.
  • the buffer structure 14 includes several buffer members 141 distributed on the side of the carrier 21 and connected between the lower shell 11.
  • the cushioning member 141 serves as a shock absorber to cushion the fuel assembly to avoid shocks.
  • the cushioning member 141 is distributed on the longitudinal side of the carrier 21, and the cushioning member 141 may also be distributed on each side.
  • the cushioning member 141 includes a shock absorbing body 1411 having elasticity, a top plate 1412 and a bottom plate 1413 disposed at opposite ends of the shock absorbing body 1411.
  • the top plate 1412 and the bottom plate 1413 are respectively provided with a first embedded portion 1414 and a second embedded portion 1415 embedded in the shock absorbing body 1411.
  • the first embedded portion 1414 and the second embedded portion 1415 are provided with a
  • the inverted structure of the shock absorbing body 1411 makes the connection between the shock absorbing body 1411 and the top plate 1412 and the bottom plate 1413 firmer.
  • the first inlay portion 1414 and the second inlay portion 1415 improve the shear performance of the shock absorbing body 1411, so that the shape change of the shock absorbing body 1411 is small, and the service life is improved.
  • the top plate 1412 and the bottom plate 1413 are respectively connected to the inner wall of the carrier 21 and the lower housing 11 and fixedly connected to the carrier 21 and the lower housing 11.
  • the buffer body is interposed between the carrying frame 21 and the housing 1 to play a role of buffering and preventing vibration.
  • the shock absorbing body 1411 may also be a structure such as a spring or an elastic sheet.
  • the first embedded portion 1414 includes a first embedded section 1416 and a second embedded section 1417 that are connected in sequence. The end of the first embedded section 1416 away from the second embedded section 1417 is connected to the top plate 1412. The shock absorbing body 1411 falls off.
  • first embedding section 1416 and the second embedding section 1417 are both cylindrical, and the cross-sectional shape of the second embedding section 1417 is larger than that of the first embedding section 1416, allowing the step difference between the two sections to form an undercut .
  • the shock absorbing body 1411 is provided with a through hole in the middle.
  • the connection hole includes a first hole segment and a second hole segment.
  • the cross-sectional size of the second hole segment is larger than that of the first hole segment.
  • the first embedding section 1416 is inserted into the first hole section, and the second embedding section 1417 is located in the second hole section and embedded into the inner wall surface of the second hole section.
  • a bolt is screwed in the middle of the top plate 1412 and can be connected to the carrier 21 through the bolt.
  • the first embedding section 1416, the second embedding section 1417, the first hole section, and the second hole section are coaxially arranged, which is convenient for assembly and positioning and makes the stress more balanced.
  • the connecting hole is located in the middle of the shock absorbing body 1411.
  • the connecting hole allows the middle of the shock absorbing body 1411 to form a hollow structure, reducing the weight of the shock absorbing body 1411, saving materials, and improving the shock absorbing performance of the shock absorbing body 1411.
  • a through hole corresponding to the second hole segment is provided in the middle of the bottom plate 1413 to allow the connection hole to communicate with the outside.
  • the second inlay portion 1415 includes a third inlay section 1418 and a fourth inlay section 1419 connected in sequence. An end of the third inlay section 1418 away from the fourth inlay section 1419 is connected to the bottom plate 1413.
  • the fourth inlay section 1419 forms an undercut prevention and The shock absorbing body 1411 falls off.
  • the third embedding section 1418 has a cylindrical shape
  • the fourth embedding section 1419 has a cone shape
  • the fourth embedding section 1419 may also have a cylindrical shape, and the cross-sectional size is different from that of the third embedding section 1418, so as to form an inverted structure.
  • the first embedded portion 1414 and the second embedded portion 1415 may also be distributed to include a plurality of sheet-like structures distributed along the circumferential direction embedded in the shock absorbing body 1411, and the ends of the sheet-like structures are bent to form an undercut.
  • the top plate 1412 and the bottom plate 1413 respectively cover the end surfaces of both ends of the damping body 1411 where the damping body 1411 is clamped.
  • the bottom plate 1413 is distributed with a number of connecting holes. After the locking fastener is inserted, it is connected and fixed with the housing 1 for easy disassembly.
  • the top plate and the bottom plate are embedded in the shock absorbing body 1411, the connection is more firm, the connection problem of the shock absorbing body 1411 and the steel plate is solved, and the steel top plate, the bottom plate and the rubber shock absorbing body 1411 are connected more firmly.
  • a steel inner lining plate is embedded in the shock absorbing body 1411, which further improves the elasticity and shearing performance of the shock absorbing body 1411, and increases the service life of the shock absorbing body 1411.
  • a support arm 23 is provided between the support assembly 22 and the carrier 21, which can support the support assembly 22 when the support assembly 22 is placed vertically, preventing the process of loading the fuel assembly 3 Tilted.
  • the support arm 23 is rotatably connected to the support assembly 22, and the carrier 21 is provided with a guide rail 211 provided in the longitudinal direction.
  • the support arm 23 and the guide rail 211 are slidingly fitted. .
  • the engaging structure includes an engaging member swingable toward the upper side of the guide rail 211, and an elastic member that provides elasticity to keep the engaging member on the upper side of the guide rail 211.
  • the support arm 23 moves on the guide rail 211 to press the engaging member to the guide rail 211.
  • the supporting arm 23 is separated from the engaging member, and the engaging member is reset to the upper side of the guide rail 211.
  • the engaging member resists the engaging of the supporting arm 23 to position the supporting assembly 22 and prevent the supporting assembly 22 from The role of flipping down.
  • the engagement member is pressed down under the guide rail 211 to release the resistance to the support arm 23, and the support arm 23 slides in the reverse direction through the engagement member to receive the support assembly 22 side.
  • the support assembly 22 includes a bracket 223 and an outer cover 224, an inner cover 227, and a lower end cover 225 that together define the cavity 4.
  • the bracket 223 extends along the longitudinal direction of the cavity 4, and the cross section of the bracket 223 is T-shaped, including a bottom wall 2231 and a side wall 2232 provided on one side of the bottom wall 2231.
  • the outer cover plate 224, the inner cover plate 227, and the side wall 2232 are located on the same side of the bottom wall 2231.
  • the outer cover plate 224 and the side wall 2232 are connected to the outer side of the bottom wall 2231 and the two longitudinal sides of the bottom wall 2231.
  • Two sides of 2232 define two chambers 4 for accommodating the fuel assembly 3, and the portions of the outer cover plate 224 and the inner cover plate 227 corresponding to the respective chambers 4 are semi-circular arcs.
  • the outer cover plate 224 of the arc-shaped structure can increase the strength of the outer cover plate 224 and is more stable when it encounters rollover or falling impacts, it can avoid the impacts and protect the internal fuel assembly 3.
  • the outer cover plate 224 of circular arc structure has a compact structure, which reduces the requirements for the external loading structure.
  • each cavity 4 is correspondingly provided with an outer cover plate 224, so that both sides of the arc-shaped outer cover plate 224 and the side wall 2232 are away from the outer edge of the bottom wall 2231 and connected to a longitudinal edge of the bottom wall 2231.
  • the inner cover plate 227 is disposed in the angle formed by the bottom wall 2231 and the side wall 2232.
  • a supporting plate 228 supporting the inner cover plate 227 is provided in the angle between the bottom wall 2231 and the side wall 2232.
  • the outer cover plate 224 and the inner cover plate 227 form a cylindrical structure, and define a chamber 4 for accommodating the fuel assembly 3 inside, and support the fuel assembly 3 from both sides.
  • the longitudinal edges of the outer cover plate 224 are rotatably connected with the bottom wall 2231 and the side wall 2232, which is convenient for disassembly and assembly.
  • one side of the outer cover 224 is rotatably connected to the longitudinal side of the bottom wall 2231, the outer cover 224 and the side wall 2232 are detachably connected to the outer side away from the bottom wall 2231, and after the outer cover 224 and the side wall 2232 are disassembled, they are turned
  • the outer cover 224 opens the cavity.
  • the support assembly 22 has a simple structure, which is convenient for loading and unloading and convenient for operation. In the operation and maintenance process and in the process of loading and unloading the fuel assembly, the operation complexity of the staff is reduced and reduced.
  • the structure of the bracket 223 can be adjusted so that the number of the chambers 4 on the support assembly 22 is adjusted accordingly.
  • only one set of outer cover plate 224 and inner cover plate 227 are formed to form one chamber 4.
  • the outer cover plate 224 is provided with a pressing structure 24 that presses or loosens the fuel assembly in the chamber 4. After the fuel assembly is inserted into the chamber 4, the pressing structure 24 The structure 24 can compress the fuel assembly in the cavity 4. When it needs to be taken out, the compressing structure 24 can be loosened again to allow the fuel assembly to come out.
  • the pressing structure 24 includes an adjusting member 241 passing through the outer cover plate 224, and a pressing member 242 located inside the outer cover plate 224 and connected to the adjusting member 241.
  • the axial position of the adjusting member 241 is adjustable
  • the adjusting member 241 is screwed with the outer cover 224 to drive the pressing member 242 to press or loosen the fuel assembly 3.
  • the adjusting member 241 can also adjust the axial movement position driven by an external structure such as a motor.
  • the outer cover plate 224 is provided with a semi-circular arc-shaped support beam 2241 provided along the circumferential direction.
  • the support beam 2241 includes one or more supports for the outer cover plate 224. When there are two or more support beams 2241, the support beams 2241 are arranged along the longitudinal direction of the cavity 4.
  • a support frame for positioning and supporting the outer wall surface of the fuel assembly 3 is provided on the inner side of the outer cover plate 224, and a side of the support frame opposite to the cavity 4 is provided with a first support plate 2242, which can fit into the cavity 4
  • the fuel assembly 3 is pre-positioned.
  • the first support plate 2242 is provided with an escape opening for the pressing member 242 to move into the cavity 4. There is a certain space between the fuel assembly 3 and the first support plate 2242.
  • the pressing member 242 can press the fuel assembly 3 Tight, preferably, and the width of the pressing member 242 is larger than the width of the partition of the fuel assembly 3, which is convenient for pressing the fuel assembly 3.
  • the lateral pressing member 242 is in direct contact with the fuel assembly grid and presses around the fuel assembly.
  • the main material is stainless steel, and the pressing member 242 lays a layer of rubber with a certain elasticity on the contact surface with the grid material.
  • the outer cover plate 224 has a semicircular arc shape, and two support frames are distributed on the inner side of the outer cover plate 224 along the circumferential direction, and each support frame extends along the longitudinal direction of the cavity 4.
  • Two positioning surfaces perpendicular to each other are formed on the inner side of the inner cover plate 227, and a second support plate 2243 is provided on the positioning surface.
  • the two positioning surfaces and the two support frames form a square-shaped cavity 4, which is opposite to the fuel assembly 3 on both sides. Positioning.
  • At least two sets of pressing structures 24 are arranged along the longitudinal direction of the cavity 4 on the area corresponding to the outer cover 224 of each support frame.
  • the installation position of the pressing structure 24 corresponds to the position of the supporting beam 2241, so that the supporting beam 2241 provides support for the pressing structure to prevent deformation.
  • the first support plate 2242 includes laminated aluminum stainless steel plates, rubber plates, and base boron carbide plates. At the same time, the two positioning surfaces of the inner cover plate 227 are also covered with a second support plate 2243 of the same material as the first support plate 2242 .
  • the outer cover plate 224 When the outer cover plate 224 is closed, the overall shape of the four aluminum-based boron carbide plates is a rectangular parallelepiped, which is wrapped around the fuel assembly, but does not contact the fuel assembly, covering the entire length of the fuel assembly.
  • the aluminum-based boron carbide flat plate has stable radiation resistance and excellent thermal neutron absorption performance, can maintain the subcritical state of the fuel assembly, and avoid causing radioactive pollution to the external environment.
  • the aluminum-based boron carbide plate covers the fuel assembly 3 from all sides.
  • the fully-covered design can well absorb the neutrons released by the fuel assembly 3, reduce the neutron escape space, and ensure safety.
  • the fully covered design can withstand high temperature, dust, and is not easy to damage the fuel assembly 3, and has a long service life.
  • the outer cover 224 can be flipped open, which also solves the problem of difficulty in installing the neutron absorbing plate due to the small space.
  • the structure is relatively traditional, easy to clean, and easy to disassemble during maintenance.
  • the lower end cover 225 is installed at the end of the support assembly 22 and the carrier 21 that is rotatably connected, and covers the bottom end of the chamber 4 as a bottom sealing device for the transportation assembly of the fuel assembly 3.
  • the lower end cover 225 includes a lower cover body 2251 for covering the bottom of the transport container, and a clamping device 2252 mounted on the lower cover body 2251.
  • the lower cover body 2251 is detachably connected to the bracket 223 and the outer cover plate 224.
  • the clamping device 2252 is installed on the lower cover 2251, which ensures the integrity of the edge of the lower cover 2251, solves the sealing problem of the fuel assembly compartment, and ensures the tightness of the fuel assembly during transportation.
  • the arc-shaped structure of the outer edge of the lower cover 2251 improves safety, the fastening device is easy to operate, improves reliability, and ensures the fastening of the fuel assembly base, making the lower cover 2251 more stressed under impact Evenly.
  • the clamping device 2252 can clamp the lower tube seat of the loaded fuel assembly, so that the fuel assembly is more stable during transportation.
  • the clamping device 2252 is provided with a cam transmission mechanism, which further improves the simplicity and reliability of the operation and makes the processing easier.
  • the clamping device 2252 includes a clamping mechanism 2253 and an operating mechanism 2254.
  • the clamping mechanism 2253 includes a clamping member that is located inside the lower cover 2251 and can reciprocate along a side of the lower cover 2251 in a clamping position and a release position 2255.
  • the operating mechanism 2254 includes an operating portion 2260 for driving the clamping member 2255 to the clamping position.
  • the clamping member 2255 When the clamping member 2255 is in the clamping position, it clamps the lower tube seat of the fuel assembly 3 in the transport container to prevent the fuel assembly 3 from being contained. Rotate in the cavity 4.
  • the operating mechanism 2254 includes a joystick 2256, a cam plate 2257, a backing plate 2258, and a tightening screw 2259.
  • the joystick 2256 rotatably penetrates the lower cover 2251.
  • the cam plate 2257 is installed at one end of the joystick 2256 and rotates with the joystick 2256 .
  • the other end of the joystick 2256 is provided with an operation part 2260 for driving the joystick 2256 to rotate after the tool is installed.
  • the operation part 2260 is a square head, which is used to buckle with an operation wrench.
  • the lever 2256 is provided with a key slot at the end where the cam disc 2257 is installed, a key is installed in the key slot, and a cam slot is provided on the cam disc 2257 to be engaged with the key.
  • the cam plate 2257 is rotatably provided on one side of the lower cover 2251, and the cam plate 2257 and the clamping member 2255 are located on the same side of the lower cover 2251.
  • the cam disc 2257 is provided with an outwardly protruding protrusion 2261, and the clamping member 2255 is located on the outer ring of the cam disk 2257, so that when the operating portion 2260 drives the cam disk 2257 to rotate, the protrusion 2261 drives the clamping member 2255 to the clamping position mobile.
  • a plurality of protrusions 2261 are distributed on the edge of the cam disc 2257 in the circumferential direction, and the clamping members 2255 are distributed on the outer ring of the cam plate in the circumferential direction, and correspond to the positions of the protrusions 2261.
  • each protrusion 2261 pushes each clamping member 2255 outward to move to the clamping position.
  • the number of the clamping member 2255 can also be one, which clamps and fixes the lower tube seat of the fuel assembly 3.
  • clamping member 2255 and the cam plate 2257 are disposed on a side of the backing plate 2258 opposite to the lower cover 2251, the backing plate 2258 can move closer to or away from the lower cover 2251, and the clamping part 2255 can slide with the backing plate 2258 cooperation.
  • the shim plate 2258 is away from the lower cover 2251, the lower tube seat of the fuel assembly 3 can be pressed tightly.
  • the shim plate 2258 approaches the lower cover 2251, it releases from the lower tube base of the fuel assembly 3.
  • the tightening screw 2259 is a hollow structure, the tightening screw 2259 is screwed to the lower cover 2251, and the operating rod 2256 is penetrated by the tightening screw 2259.
  • the backing plate 2258 is installed at the end of the tightening screw 2259, and the tightening screw 2259 rotates on the lower cover 2251 to adjust the axial position to drive the backing plate 2258 and the clamping member 2255 closer to or away from the lower cover 2251.
  • the rotation of the cam plate 2257 can be driven by a gear mechanism or the like, and the axial movement of the pad 2258 can also be driven by a piston rod or the like.
  • the clamping device 2252 further includes a plurality of resetting members 2262 that respectively abut against the clamping members 2255.
  • the resetting member 2262 provides the clamping member 2255 with an elastic force to move toward the release position.
  • the clamping mechanism 2253 further includes a baffle 2263 covering the clamping member 2255, and the baffle 2263 is provided with a bayonet 2264 for the clamping member 2255 to extend after moving to the clamping position.
  • the clamping member 2255 includes four, distributed at the inner four corners of the baffle 2263.
  • the baffle 2263 is connected to the backing plate 2258, and the clamping member 2255 is located in the space formed by the baffle 2263 and the backing plate 2258.
  • the baffle 2263 can protect the clamping member 2255, the resetting member 2262 and the backing plate 2258, etc., to prevent damage during the clamping process.
  • the end of the support assembly 22 opposite to the loading and unloading port 221 is rotatably connected to the carrier 21 so that the support assembly 22 can be placed horizontally or erected.
  • the lower cover 2251 is provided with a rotation part 2265 for the rotation of the support assembly 22 and the carrier 21, and the rotation part 2265 is usually a rotation shaft or a rotation hole, or the rotation shaft and the rotation hole are provided at the same time to ensure that The cover 2251 can be rotated and matched with the carrier 21.
  • the bracket 223 and the carrier 21 can also be rotated to cooperate.
  • the upper end cap 222 serves as a top capping device for the transport container of the fuel assembly 3, and includes a door panel 2221 for covering the upper end of the transport container compartment 4 and a door panel 2221 mounted on the door panel 2221.
  • the number of the door panels 2221 corresponds to the number of the cavity 4, each door panel 2221 is detachably connected to the bracket 223, and each door panel 2221 covers one of the cavity 4 respectively.
  • the fuel assembly 3 can be capped separately.
  • the upper end cover 222 may also be an integrated structure, which can simultaneously open and close the loading and unloading ports 221 corresponding to the respective cavity 4.
  • each door panel 2221 is connected to the side wall 2232 in rotation, and the locking structure 2222 on the door panel 2221 fixes the fuel assembly 3 axially.
  • each door panel 2221 is also rotationally connected to the bottom wall 2231 respectively, and the axis direction of the rotational connection of the door panel 2221 and the side wall 2232 and the bottom wall 2231 is different, that is, they cannot be rotated at the same time.
  • each door panel 2221 may also be rotatably connected to only one of the side wall 2232 and the bottom wall 2231.
  • the locking structure includes a first lock lever 2222 and a second lock lever 2223 that are axially adjustable on the door panel 2221, and the first lock lever 2222 is located in the middle of the door panel 2221 and is connected to the upper tube of the fuel assembly 3
  • the center positions of the seats are opposite
  • the second lock lever 2223 includes a plurality of pieces, and the centers are symmetrically arranged on the circumference of the first lock lever 2222.
  • the first lock lever 2222 and the second lock lever 2223 can be adjusted independently, which can be used to compress the fuel assembly without related components, as well as the fuel assembly with related components, multi-functional use, the device is easy to operate , Simple maintenance.
  • the first lock lever 2222 and the second lock lever 2223 are screwed to the door panel 2221, respectively, and can be rotated to adjust the axial position, so that the first lock lever 2222 and the second lock lever 2223 tightly fix the lower tube seat.
  • An adjustment nut is screwed to the ends of the first lock lever 2222 and the second lock lever 2223 that are away from the transport container cavity 4, and turning the adjustment nut drives the axial movement of the first lock lever 2222 and the second lock lever 2223 to adjust the adjustment position.
  • the ends of the first lock lever 2222 and the second lock lever 2223 opposite to the transport container cavity 4 are provided with a soft buffer head 2224, which can reduce the impact during fixing and prevent damage to the lower tube base.
  • the buffer head 2224 is a soft rubber pad to avoid scratching the end surfaces of the fuel assembly and related assemblies during use.
  • the end portions of the first lock lever 2222 and the second lock lever 2223 opposite to the transport container cavity 4 are provided with a pressing block 2225, which can increase the area of pressure and increase stability.
  • the buffer head 2224 is installed on a side of the pressing block 2225 opposite to the cavity 4, and the buffer head 2224 is sleeved on the pressing block 2225.
  • a compression spring is distributed on the side of the upper tube seat of the fuel assembly 3 opposite to the door plate 2221, and the second lock lever 2223 is opposite to the compression spring on the upper tube seat of the fuel assembly 3.
  • the top capping device includes two door panels 2221 hinged to each other, each door panel 2221 is provided with a locking structure, and each door panel 2221 is located opposite to the cavity 4 of the fuel container 3 in the transport container.
  • the locking structure 2222 includes a lock rod screwed on the lock hole and disposed toward the cavity 4 through the lock hole.
  • the inner end of the lock rod is usually provided with a baffle plate to adjust the axial position of the lock rod.
  • the baffle plate and the fuel assembly When the three parts are in contact, the fuel assembly 3 can be axially locked to prevent shaking in the axial direction.
  • the fuel rods 3 of different lengths can also be fixed axially after being inserted into the cavity 4 by the lock lever.
  • a locking structure 2222 can also be provided on the lower cover 2251 to position the end of the fuel assembly 3.

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Abstract

一种燃料组件（3）运输容器及其底部密封装置（225），所述底部密封装置（225）包括用于封盖在运输容器底部的下盖体（2251）以及安装在下盖体（2251）上的卡紧装置（2252）。卡紧装置（2252）包括卡紧机构（2253）、操作机构（2254），卡紧机构（2253）包括位于下盖体（2251）内侧、并可沿下盖体（2251）侧面在一个卡紧位置和一个松开位置往复运动的至少一个卡紧件（2255）。操作机构（2254）包括用于带动卡紧件（2255）向卡紧位置运动的操作部（2260），卡紧件（2255）在卡紧位置时，卡紧运输容器内的燃料组件（3）下管座。卡紧装置（2252）安装在下盖体（2251）上，保证了下盖体（2251）边缘的完整性，解决了燃料组件（3）舱室的密封问题，保证燃料组件（3）在运输过程中舱室的密闭性。下盖体（2251）外边缘的弧形结构提高了安全性，紧固装置操作简单，提高了可靠性，保证燃料组件（3）底座的紧固，下盖体（2251）在受冲击时受力更均匀。

Description

燃料组件运输容器及其底部密封装置 技术领域
本发明涉及核电领域，更具体地说，涉及一种燃料组件运输容器及其底部密封装置。
 背景技术
相关技术中的核燃料组件的运输容器的舱室底部封闭板，在其外边缘上有凹口，在门的端板的关闭位置，门和凸销插入到凹口中；
底部封闭板封闭的燃料组件舱室的端面，封闭板具有在容器纵向方向上保持燃料组件的可调节件。
上述产品结构或技术的缺点如下：
1、封闭板外端开有长圆形通孔，对封闭板的强度有削弱；
2、封闭板的外端有沉入式的凹槽面，加工工艺繁琐，加工精度难以保证；
3、封闭板的内侧有多个锁紧滑块和紧固螺钉，在锁紧的过程中，操作时间长，操作复杂；
4、封闭板的外边缘为直边段，在冲击工况下，受力不均匀。
 技术问题
本发明要解决的技术问题在于，提供一种燃料组件运输容器及其底部密封装置。
 技术解决方案
本发明解决其技术问题所采用的技术方案是：构造一种燃料组件运输容器的底部密封装置，包括用于封盖在所述运输容器底部的下盖体、以及安装在所述下盖体上的卡紧装置；
所述卡紧装置包括卡紧机构、操作机构，所述卡紧机构包括位于所述下盖体内侧、并可沿所述下盖体侧面在一个卡紧位置和一个松开位置往复运动的至少一个卡紧件；
所述操作机构包括用于带动所述卡紧件向所述卡紧位置运动的操作部，所述卡紧件在所述卡紧位置时，卡紧所述运输容器内的燃料组件下管座。
优选地，所述操作机构包括凸轮盘，所述凸轮盘可转动地设置在所述下盖体的一侧，且所述凸轮盘和所述卡紧件位于所述下盖体的同一侧；
所述凸轮盘边缘设有向外凸出的凸起，所述卡紧件位于所述凸轮盘外圈，以在所述操作部带动所述凸轮盘转动时，所述凸起带动所述卡紧件向所述卡紧位置移动。
优选地，所述凸轮盘边缘沿周向分布有若干凸起，所述卡紧件沿周向分布在所述凸轮片的外圈，并与各所述凸起的位置对应；
所述卡紧装置还包括分别与各所述卡紧件相抵的若干复位件，所述复位件向所述卡紧件提供向所述松开位置移动地弹力。
优选地，所述操作机构包括可转动地穿设所述下盖体的操纵杆，所述凸轮盘安装在所述操纵杆的一端；
所述操纵杆的另一端设有所述操作部，供工具安装后带动所述操纵杆转动，在转动所述操纵杆时带动所述凸轮盘转动。
优选地，所述操纵杆供所述凸轮盘安装的一端设有键槽，所述键槽内安装有键，所述凸轮盘上设有卡合到所述键上的卡槽。
优选地，所述操作机构还包括垫板，所述卡紧件、凸轮盘设置于所述垫板与所述下盖体相背的一侧，所述垫板可靠近或远离所述下盖体移动。
优选地，所述操作机构还包括紧固螺杆，所述紧固螺杆为中空结构，所述紧固螺杆与所述下盖体螺接，所述操纵杆穿设所述紧固螺杆；
所述垫板安装在所述紧固螺杆的端部，所述紧固螺杆在所述下盖体上转动，调节轴向位置，带动所述垫板、卡紧件靠近或远离所述下盖体。
优选地，所述卡紧机构还包括盖设到所述卡紧件上的挡板，所述挡板上设有供所述卡紧件向所述卡紧位置移动后伸出的卡口。
优选地，所述挡板和所述垫板连接，所述卡紧件位于所述挡板、垫板组装形成的空间内。
一种燃料组件运输容器，包括所述的底部密封装置。
 有益效果
实施本发明的燃料组件运输容器及其底部密封装置，具有以下有益效果：卡紧装置安装在下盖体上，保证了下盖体边缘的完整性，解决了燃料组件舱室的密封问题，保证了燃料组件在运输过程中舱室的密闭性。下盖体外边缘的弧形结构提高了安全性，紧固装置操作简单，提高了可靠性，保证了燃料组件底座的紧固，使得下盖体在受冲击的状态下，受力更均匀。卡紧装置可以对所装载的燃料组件的下管座进行卡紧，使得燃料组件在运输的过程中更加稳固。
 附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明实施例中的燃料组件运输容器的立体结构示意图；
图2是图1中的燃料组件运输容器的支撑组件立起时的结构示意图；
图3是图1中的上壳体打开后的示意图；
图4是图1中的燃料组件运输容器的分解示意图；
图5是图1中的支撑组件的横向剖面示意图；
图6是图5中的缓冲结构的缓冲件的剖面示意图；
图7是图4中支撑组件的一盖板翻转打开时的示意图；
图8是图4中的支撑组件的横向剖面示意图；
图9是图8中的外盖板及外盖板上的组装件的剖面示意图；
图10是图4中的下端盖的立体示意图；
图11是图10中下端盖的剖面示意图；
图12是图11中的挡板打开时的立体示意图；
图13是图4中的上端盖的立体示意图。
 本发明的最佳实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
如图1至图4所示，本发明一个优选实施例中的燃料组件运输容器包括外壳1和设置在外壳1内的支撑结构2，支撑结构2包括承载架21、支撑组件22。
承载架21安装在外壳1内侧，支撑组件22安装在承载架21上，支撑组件22内形成有两个容置并固定燃料组件3的容腔4，燃料组件3通常为柱状结构。支撑组件22能带动容腔4内的燃料组件3水平放置或立起。
支撑组件22的另一端设有装卸口221，在支撑组件22立起时，装卸口221位于容腔4上端，供燃料组件3从装卸口221沿轴向插入到容腔4内、或从容腔4沿轴向脱出装卸口221。
容腔4内与装卸口221相对的一端设有对燃料组件3周向定位的下端盖225，装卸口221上安装有对容腔4封盖并对容腔4内的燃料组件3轴向定位的上端盖222。
支撑组件22可在吊机的作用下在水平状态和竖直状态转动，支撑组件22在竖直状态时，便于将燃料组件3垂直吊放进容腔4，也便于将装有燃料组件3的支撑组件22转动至水平状态。燃料组件3的装入过程更加的简单快捷，提升了装载效率，在将支撑组件22和燃料组件3同时放置水平后，收容在运输容器内，可便于对燃料组件3运输。
在燃料组件3放入容腔4后，且在封盖上端盖222之前，燃料组件3就已经周向定位，可防止在容腔4内转动。在封盖上上端盖222之后，燃料组件3又可以轴向定位，防止在容腔4的纵向移动，实现燃料组件3的全约束，防止在运输过程中在容腔4内晃动，提升运输的安全稳定性。
结合图5所示，通常，外壳1包括下壳体11和安装在下壳体11上侧的上壳体12，下壳体11、上壳体12组装形成轴线水平设置的柱形结构，便于装载运输，本实施例中，柱形结构为八棱柱形，当然，外壳1的外形也可为轴线水平的方柱形结构。
下壳体11、上壳体12的侧壁均为带有空心夹层的双层结构，让外壳具有较高的防冲击强度和优良的隔热、减震、可去污性能。
优选地，上壳体12包括上外壳122、上内壳123、以及设置在两端部的上端板124，上外壳122、上内壳123之间相互间隔，形成带有空心夹层的双层结构。下壳体11包括下外壳112、下内壳113、以及设置在两端部的下端板114，下外壳112、下内壳113之间相互间隔，形成带有空心夹层的双层结构。
上外壳122、上内壳123之间、以及下外壳112、下内壳113之间均填充有隔热减震材料。双层结构间填充有隔热减震材料，可以有效减轻容器跌落时产生的震动以及外部撞击对容器内组件的影响，同时减少火烧工况时热量向壳体内部的传导。隔热减震材料可以成型后装填进上壳体、下壳体多边形双层结构内，体积小、易于更换；同时容器内可包容多组燃料组件。
进一步地，上外壳122、上内壳123之间、以及下外壳112、下内壳113之间均设置有加强肋13，可以提升外壳1的强度，防止在吊起搬运过程中变形，也能提升抗冲击的能力。
再如图2至图4所示，在一些实施例中，上壳体12的两端分别设有向下壳体11一侧伸出设置的卡舌121，下壳体11的端面内侧设有供卡舌121卡入的卡槽111。卡舌121包括钢板和在钢板外包的软木，既能保证强度，还能起到缓冲减震的作用。
在上壳体12安装到下壳体11时，卡舌121卡入到卡槽111内，便于两者之间的定位。下壳体11、上壳体12的端面外形均为多边形，组装后形成八棱柱形结构，下壳体11、上壳体12的相邻边分别设有将下壳体11、上壳体12相互锁合连接的法兰边 。上壳体12的边缘和下壳体11的边缘分别设有法兰边，可以将上壳体12、下壳体11锁合固定。
上壳体12的两端设有用于吊装的吊装结构，吊装结构上设有第一吊装孔125。下壳体11下侧设有支脚，支脚上设有用于吊装的第一吊装孔115。下壳体11下侧还设有供叉车的插入后托起的叉车孔116。设置有吊装孔和叉车孔116多种吊装方式，让吊装更加方便。
结合图2至图6所示，优选地，在承载架21的侧边设有和下壳体11弹性连接的缓冲结构14，使承载架21悬挂于下壳体11内，悬挂并弹性连接可以减少外部对承载架21的冲击。缓冲结构14能吸收外壳1传递到承载架21的冲击，避免对燃料组件3产生冲击。
在一些实施例中，缓冲结构14包括在承载架21的侧边分布、并和下壳体11之间连接的若干缓冲件141。缓冲件141作为减震装置为燃料组件进行减震缓冲，避免受到冲击，通常，缓冲件141在承载架21的纵向侧边分布，也可在各边均分布缓冲件141。
缓冲件141包括具有弹性的减震本体1411，设置在减震本体1411两相对端的顶板1412、底板1413。顶板1412和底板1413上分别设有嵌入到减震本体1411内的第一内嵌部1414、第二内嵌部1415，第一内嵌部1414、第二内嵌部1415上均设有防止与减震本体1411脱落的倒扣结构，使减震本体1411与顶板1412、底板1413之间的连接更牢固。
第一内嵌部1414、第二内嵌部1415提高了减震本体1411的剪切性能，使减震本体1411的形变更小，提高了使用寿命。
顶板1412和底板1413分别连接至承载架21和下壳体11内壁，与承载架21和下壳体11固定连接。缓冲体夹设在承载架21和外壳1之间，可以起到缓冲、防止震动的作用。在其他实施例中，减震本体1411也可为弹簧、弹片等结构。
第一内嵌部1414包括依次连接的第一嵌入段1416、第二嵌入段1417，第一嵌入段1416远离第二嵌入段1417的一端与顶板1412连接，第二嵌入段1417形成倒扣防止与减震本体1411脱落。
在本实施例中，第一嵌入段1416、第二嵌入段1417均为筒状，第二嵌入段1417的断面外形大于第一嵌入段1416的断面外形，让两段之间的段差形成倒扣。
减震本体1411中部设有贯穿的连接孔，连接孔包括第一孔段、第二孔段，第二孔段的断面尺寸大于第一孔段的断面尺寸。第一嵌入段1416插设在第一孔段内，第二嵌入段1417位于第二孔段内，并嵌入到第二孔段的内壁面内。
顶板1412中部螺接有螺栓，可通过螺栓与承载架21连接。优选地，第一嵌入段1416、第二嵌入段1417、第一孔段、第二孔段同轴设置，便于组装定位，让受力也更加均衡。
连接孔位于减震本体1411的中部，连接孔让减震本体1411中部形成中空结构，减轻了减震本体1411的重量、节省材料，提高了减震本体1411的减震性能。
底板1413中部设有与第二孔段对应连通的通孔，让连接孔与外部连通。
第二内嵌部1415包括依次连接的第三嵌入段1418、第四嵌入段1419，第三嵌入段1418远离第四嵌入段1419的一端与底板1413连接，第四嵌入段1419形成倒扣防止与减震本体1411脱落。
第三嵌入段1418呈筒状，第四嵌入段1419呈圆锥体。在其他实施例中，第四嵌入段1419也可呈筒状，且断面尺寸与第三嵌入段1418的断面尺寸不同，以形成倒扣结构。
第一内嵌部1414、第二内嵌部1415也可分布包括沿周向分布的多个片状结构嵌入到减震本体1411内，片状结构的端部弯折形成倒扣。
顶板1412、底板1413分别覆盖所在的减震本体1411的两端端面，将减震本体1411夹持，底板1413上分布有若干连接孔，穿设锁固件后与外壳1连接固定，容易拆装。
顶板和底板内嵌在减震本体1411中，连接更加牢固，解决了减震本体1411与钢板的连接问题，使钢制顶板、底板和橡胶材质的减震本体1411连接更牢固，同时，由于减震本体1411中嵌入设置了钢制内衬板，进而进一步提升减震本体1411的弹性和剪切性能，提高了减震本体1411的使用寿命。
再如图3所示，进一步地，支撑组件22和承载架21之间设有支撑臂23，可以在支撑组件22竖直放置时，对支撑组件22进行支撑，防止在装入燃料组件3过程中产生倾斜。
支撑臂23与支撑组件22转动连接，承载架21上设有沿纵向方向设置的导轨211，支撑臂23与导轨211滑动配合，导轨211的一端设有将支撑臂23卡合定位的卡合结构。
卡合结构包括可向导轨211上侧摆动地卡合件、以及提供弹力让卡合件保持位于导轨211上侧的弹性件。
在支撑组件22竖起过程中，支撑臂23在导轨211上移动将卡合件压到导轨211。在支撑组件竖起后，支撑臂23与卡合件分离，卡合件复位到导轨211上侧，卡合件对支撑臂23抵挡卡合，起到对支撑组件22定位、防止支撑组件22向下翻转的作用。在燃料组件3装入支撑组件22后，再将卡合件下压到导轨211下，解除对支撑臂23的抵挡，让支撑臂23在反向滑动经过卡合件收到支撑组件22的下侧。
结合图4、图5及图7所示，在一些实施例中，支撑组件22包括支架223和共同围成容腔4的外盖板224、内盖板227、下端盖225。优选地，支架223沿容腔4的纵向方向延伸，支架223的断面呈T形，包括底壁2231和在底壁2231一侧设置的侧壁2232。
外盖板224、内盖板227和侧壁2232位于底壁2231的同一侧，外盖板224与侧壁2232远离底壁2231的外边、以及与底壁2231的两纵向边连接，在侧壁2232的两侧界定出两个容置燃料组件3的容腔4，外盖板224、内盖板227与各容腔4对应的部分的均呈半圆弧形。
弧形结构的外盖板224可以提升外盖板224的受力强度，在遇到侧翻、跌落冲击时更稳定，能够避开冲击，保护内部的燃料组件3。圆弧结构的外盖板224，结构紧凑，降低了对于外部装载结构的要求。
优选地，每一容腔4对应设置一外盖板224，让弧形外盖板224的两边与侧壁2232远离底壁2231的外边、以及与底壁2231的一纵向边连接。
同时，内盖板227设置在底壁2231、侧壁2232形成的夹角内，优选地，底壁2231和侧壁2232的夹角内设有对内盖板227支撑的托板228。外盖板224、内盖板227组成筒状结构，并在内部界定出一个容置燃料组件3的容腔4，从两侧对燃料组件3支撑。
外盖板224的纵向边与底壁2231和侧壁2232之间均转动连接，便于拆装。优选地，外盖板224的一边与底壁2231的纵向边转动连接，外盖板224与侧壁2232远离底壁2231的外边可拆卸连接，在外盖板224与侧壁2232拆开后，翻转外盖板224打开容腔。
支撑组件22结构形式简单，利于装卸，便于操作。在运行维护过程中以及燃料组件的装卸过程中，减少并降低了工作人员操作复杂性。
为了装入不同数量的燃料组件3，支架223的结构可以调整，使支撑组件22上的容腔4的数量对应调整，比如，只设置一组外盖板224、内盖板227形成一个容腔4。
结合图7、图8、图9所示，外盖板224上设有对容腔4内的燃料组件压紧或松开的压紧结构24，在燃料组件装入容腔4后，压紧结构24可以对容腔4内的燃料组件压紧，在需要取出时，压紧结构24再松开，让燃料组件能脱出。
在一些实施例中，压紧结构24包括穿设外盖板224的调节件241、以及位于外盖板224内侧并与调节件241连接的压紧件242，调节件241的轴向位置可调，优选地，调节件241与外盖板224螺接，以带动压紧件242压紧或松开燃料组件3。调节件241也可在电机等外部结构的带动下调节轴向移动位置。
外盖板224的外侧设有沿周向方向设置的半圆弧形支撑梁2241，支撑梁2241包括一根或多根，对外盖板224起到支撑。当有两根及两根以上的多根支撑梁2241时，各支撑梁2241沿容腔4的纵向方向排布。
外盖板224内侧设有对燃料组件3的外壁面定位支撑的支撑架，支撑架与容腔4相对的一侧设有第一支撑板2242，第一支撑板2242可对装入容腔4的燃料组件3进行预定位。
第一支撑板2242上设有供压紧件242向容腔4内移动的避让口，燃料组件3与第一支撑板2242之间会有一定的空间，压紧件242可对燃料组件3压紧，优选地，且压紧件242的宽度大于燃料组件3的隔架的宽度，便于压紧燃料组件3。在运输过程中，横向压紧件242与燃料组件格架直接接触，并压紧燃料组件的四周，主体材料选用不锈钢，压紧件242在与格架的接触面铺设一层具有一定弹性的橡胶材料。
外盖板224呈半圆弧形，外盖板224的内侧沿周向分布有两个支撑架，每个支撑架沿容腔4的纵向方向延伸设置。内盖板227的内侧形成有相互垂直的两个定位面，定位面上设有第二支撑板2243，两个定位面和两个支撑架形成方形的容腔4，对燃料组件3的两侧定位。
每一支撑架与外盖板224对应的区域上沿容腔4的纵向方向排布有至少两组压紧结构24。优选地，压紧结构24的安装位置与支撑梁2241的位置相对应，让支撑梁2241为压紧结构提供支撑，防止变形。
第一支撑板2242包括层叠设置的铝不锈钢板、橡胶板、基碳化硼板，同时，内盖板227的两个定位面上也覆盖有与第一支撑板2242材质相同的第二支撑板2243。当外盖板224闭合时，四张铝基碳化硼板整体外形呈长方体形，包覆在燃料组件四周，但与燃料组件不接触，覆盖燃料组件的整个长度范围。
铝基碳化硼平板具有稳定的耐辐照性能和优异的热中子吸收性能，能够维持燃料组件的次临界状态，避免对外界环境造成放射性污染。铝基碳化硼板从四周包覆住燃料组件3，全包覆设计可以很好的吸收燃料组件3释放出来的中子，减小中子逃逸空间，保证了安全性。全包覆式设计可以耐高温、耐粉尘、不易对燃料组件3造成损坏，使用寿命长。
外盖板224可翻转打开，还解决了因空间狭小，安装中子吸收板困难的问题，结构相对传统形式，易于清洁，检修过程中，便于拆装。
结合图10至12所示，下端盖225安装在支撑组件22与承载架21转动连接的一端，对容腔4的底部一端进行封盖，作为燃料组件3运输容器的底部密封装置。
优选地，下端盖225包括用于封盖在运输容器底部的下盖体2251、以及安装在下盖体2251上的卡紧装置2252，下盖体2251与支架223和外盖板224可拆卸连接。
卡紧装置2252安装在下盖体2251上，保证了下盖体2251边缘的完整性，解决了燃料组件舱室的密封问题，保证了燃料组件在运输过程中舱室的密闭性。下盖体2251外边缘的弧形结构提高了安全性，紧固装置操作简单，提高了可靠性，保证了燃料组件底座的紧固，使得下盖体2251在受冲击的状态下，受力更均匀。卡紧装置2252可以对所装载的燃料组件的下管座进行卡紧，使得燃料组件在运输的过程中更加稳固。卡紧装置2252设置了凸轮传动机构，进而进一步提升操作的简便性和可靠性，使得加工更为简单。
卡紧装置2252包括卡紧机构2253、操作机构2254，卡紧机构2253包括位于下盖体2251内侧、并可沿下盖体2251侧面在一个卡紧位置和一个松开位置往复运动的卡紧件2255。
操作机构2254包括用于带动卡紧件2255向卡紧位置运动的操作部2260，卡紧件2255在卡紧位置时，卡紧运输容器内的燃料组件3下管座，防止燃料组件3在容腔4内转动。
操作机构2254包括操纵杆2256、凸轮盘2257、垫板2258以及紧固螺杆2259，操纵杆2256可转动地穿设下盖体2251，凸轮盘2257安装在操纵杆2256的一端，随操纵杆2256转动。
操纵杆2256的另一端设有操作部2260，供工具安装后带动操纵杆2256转动，在转动操纵杆2256时带动凸轮盘2257转动。本实施例中，操作部2260为方形头，用于与操作扳手套扣。
操纵杆2256供凸轮盘2257安装的一端设有键槽，键槽内安装有键，凸轮盘2257上设有卡合到键上的卡槽。
凸轮盘2257可转动地设置在下盖体2251的一侧，且凸轮盘2257和卡紧件2255位于下盖体2251的同一侧。凸轮盘2257边缘设有向外凸出的凸起2261，卡紧件2255位于凸轮盘2257外圈，以在操作部2260带动凸轮盘2257转动时，凸起2261带动卡紧件2255向卡紧位置移动。
优选地，凸轮盘2257边缘沿周向分布有若干凸起2261，卡紧件2255沿周向分布在凸轮片的外圈，并与各凸起2261的位置对应。凸轮盘2257转动时，各凸起2261分别将各卡紧件2255向外推动向卡紧位置移动。卡紧件2255的数量也可为一个，对燃料组件3的下管座卡紧固定。
进一步地，卡紧件2255、凸轮盘2257设置于垫板2258与下盖体2251相背的一侧，垫板2258可靠近或远离下盖体2251移动，卡紧件2255可滑动地与垫板2258配合。在垫板2258远离下盖体2251时，可以对燃料组件3下管座抵紧。在垫板2258靠近下盖体2251时，与燃料组件3下管座松开。
优选地，紧固螺杆2259为中空结构，紧固螺杆2259与下盖体2251螺接，操纵杆2256穿设紧固螺杆2259。垫板2258安装在紧固螺杆2259的端部，紧固螺杆2259在下盖体2251上转动，调节轴向位置，带动垫板2258、卡紧件2255靠近或远离下盖体2251。
在其他实施例中，凸轮盘2257的转动可以由齿轮机构等机构带动转动，垫板2258的轴向移动也可由活塞杆等带动。
卡紧装置2252还包括分别与各卡紧件2255相抵的若干复位件2262，复位件2262向卡紧件2255提供向松开位置移动地弹力。
卡紧机构2253还包括盖设到卡紧件2255上的挡板2263，挡板2263上设有供卡紧件2255向卡紧位置移动后伸出的卡口2264。卡紧件2255包括四个，分布在挡板2263的内侧四角。挡板2263和垫板2258连接，卡紧件2255位于挡板2263、垫板2258组装形成的空间内。挡板2263可以对卡紧件2255、复位件2262及垫板2258等保护，防止在卡紧过程中受到损坏。
进一步地，支撑组件22与装卸口221相对的一端与承载架21转动连接，以能使支撑组件22水平放置或立起。优选地，下盖体2251上设有供支撑组件22与承载架21转动配合的转动部2265，转动部2265通常为转动轴，也可为转动孔，或转动轴、转动孔同时设置，保证下盖体2251能与承载架21转动配合即可。在其他实施例中，也可让支架223与承载架21转动配合。
结合图13所示，在一些实施例中，上端盖222作为燃料组件3运输容器的顶部封盖装置，包括用于盖设到运输容器容腔4上端的门板2221、以及安装在门板2221上将运输容器内的燃料组件3轴向锁紧的锁紧结构。
门板2221的数量与容腔4数量对应，各门板2221与支架223可拆卸连接，各门板2221分别对其中一容腔4盖设。在其中一容腔4内装入燃料组件3后，可以单独将装入的燃料组件3封盖盖合。当然，上端盖222也可为一体结构，能同时打开、关闭各容腔4对应的装卸口221。
进一步地，各门板2221分别与侧壁2232转动连接，门板2221上的锁紧结构2222，将装入的燃料组件3轴向固定。同时，各门板2221也分别与底壁2231转动连接，门板2221与侧壁2232、底壁2231的转动连接的轴线方向不同，即不能同时转动。在其他实施例中，各门板2221也可只与侧壁2232、底壁2231中的一个转动连接。
优选地，锁紧结构包括轴向位置可调地安装在门板2221上的第一锁杆2222、第二锁杆2223，第一锁杆2222位于门板2221的中部，且与燃料组件3的上管座中心位置相对，第二锁杆2223包括多根，中心对称地设置在第一锁杆2222的周圈。第一锁杆2222、第二锁杆2223可以分别独立的调节，既可以用于压紧不带相关组件的燃料组件，又可以压紧带相关组件的燃料组件，多功能使用，该装置操作方便，维护简单。
第一锁杆2222、第二锁杆2223分别螺接到门板2221上，可以转动调节轴向位置，让第一锁杆2222、第二锁杆2223将下管座抵紧固定。第一锁杆2222、第二锁杆2223远离运输容器容腔4的一端螺接有调节螺母，转动调节螺母带动第一锁杆2222、第二锁杆2223的轴向移动调节位置。
第一锁杆2222、第二锁杆2223与运输容器容腔4相对的端部设有软质的缓冲头2224，可以降低固定时的冲击，防止损坏下管座。优选地，缓冲头2224为软胶垫，避免使用时造成燃料组件和相关组件端部表面的剐蹭。
进一步地，第一锁杆2222、第二锁杆2223与运输容器容腔4相对的端部设有压紧块2225，可以增加抵压的面积，增加稳定性。缓冲头2224安装在压紧块2225与容腔4相对的一侧，缓冲头2224套设到压紧块2225上。
燃料组件3的上管座与门板2221相对的一侧上分布有压紧弹簧，第二锁杆2223与燃料组件3的上管座上的压紧弹簧相对。
顶部封盖装置包括两块相互铰接的门板2221，每一门板2221上均设有锁紧结构，各门板2221分别与运输容器内容置不同燃料组件3的容腔4位置相对。
锁紧结构2222包括螺接在锁孔上、并穿过锁孔朝向容腔4设置的锁杆，锁杆的内端通常设有挡板，调节锁杆的轴向位置，挡板与燃料组件3相抵靠，即可实现将燃料组件3轴向锁紧，防止在轴向晃动。
另外，若燃料组件3的长度不同时，装入容腔4后，也能利用锁杆将不同长度的燃料组件3轴向固定。
相应的，也可在下盖体2251上设置锁紧结构2222，对燃料组件3的端部定位。
可以理解地，上述各技术特征可以任意组合使用而不受限制。
以上仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种燃料组件运输容器的底部密封装置，其特征在于，包括用于封盖在所述运输容器底部的下盖体（2251）、以及安装在所述下盖体（2251）上的卡紧装置（2252）；
    所述卡紧装置（2252）包括卡紧机构（2253）、操作机构（2254），所述卡紧机构（2253）包括位于所述下盖体（2251）内侧、并可沿所述下盖体（2251）侧面在一个卡紧位置和一个松开位置往复运动的至少一个卡紧件（2255）；
    所述操作机构（2254）包括用于带动所述卡紧件（2255）向所述卡紧位置运动的操作部（2260），所述卡紧件（2255）在所述卡紧位置时，卡紧所述运输容器内的燃料组件（3）下管座。
  2. 根据权利要求1所述的燃料组件运输容器的底部密封装置，其特征在于，所述操作机构（2254）包括凸轮盘（2257），所述凸轮盘（2257）可转动地设置在所述下盖体（2251）的一侧，且所述凸轮盘（2257）和所述卡紧件（2255）位于所述下盖体（2251）的同一侧；
    所述凸轮盘（2257）边缘设有向外凸出的凸起（2261），所述卡紧件（2255）位于所述凸轮盘（2257）外圈，以在所述操作部（2260）带动所述凸轮盘（2257）转动时，所述凸起（2261）带动所述卡紧件（2255）向所述卡紧位置移动。
  3. 根据权利要求2所述的燃料组件运输容器的底部密封装置，其特征在于，所述凸轮盘（2257）边缘沿周向分布有若干凸起（2261），所述卡紧件（2255）沿周向分布在所述凸轮片的外圈，并与各所述凸起（2261）的位置对应；
    所述卡紧装置（2252）还包括分别与各所述卡紧件（2255）相抵的若干复位件（2262），所述复位件（2262）向所述卡紧件（2255）提供向所述松开位置移动地弹力。
  4. 根据权利要求2或3所述的燃料组件运输容器的底部密封装置，其特征在于，所述操作机构（2254）包括可转动地穿设所述下盖体（2251）的操纵杆（2256），所述凸轮盘（2257）安装在所述操纵杆（2256）的一端；
    所述操纵杆（2256）的另一端设有所述操作部（2260），供工具安装后带动所述操纵杆（2256）转动，在转动所述操纵杆（2256）时带动所述凸轮盘（2257）转动。
  5. 根据权利要求4所述的燃料组件运输容器的底部密封装置，其特征在于，所述操纵杆（2256）供所述凸轮盘（2257）安装的一端设有键槽，所述键槽内安装有键，所述凸轮盘（2257）上设有卡合到所述键上的卡槽。
  6. 根据权利要求4所述的燃料组件运输容器的底部密封装置，其特征在于，所述操作机构（2254）还包括垫板（2258），所述卡紧件（2255）、凸轮盘（2257）设置于所述垫板（2258）与所述下盖体（2251）相背的一侧，所述垫板（2258）可靠近或远离所述下盖体（2251）移动。
  7. 根据权利要求6所述的燃料组件运输容器的底部密封装置，其特征在于，所述操作机构（2254）还包括紧固螺杆（2259），所述紧固螺杆（2259）为中空结构，所述紧固螺杆（2259）与所述下盖体（2251）螺接，所述操纵杆（2256）穿设所述紧固螺杆（2259）；
    所述垫板（2258）安装在所述紧固螺杆（2259）的端部，所述紧固螺杆（2259）在所述下盖体（2251）上转动，调节轴向位置，带动所述垫板（2258）、卡紧件（2255）靠近或远离所述下盖体（2251）。
  8. 根据权利要求7所述的燃料组件运输容器的底部密封装置，其特征在于，所述卡紧机构（2253）还包括盖设到所述卡紧件（2255）上的挡板（2263），所述挡板（2263）上设有供所述卡紧件（2255）向所述卡紧位置移动后伸出的卡口（2264）。
  9. 根据权利要求8所述的燃料组件运输容器的底部密封装置，其特征在于，所述挡板（2263）和所述垫板（2258）连接，所述卡紧件（2255）位于所述挡板（2263）、垫板（2258）组装形成的空间内。
  10. 一种燃料组件运输容器，其特征在于，包括权利要求1至9任一项所述的底部密封装置。
PCT/CN2018/117530 2018-11-26 2018-11-26 燃料组件运输容器及其底部密封装置 WO2020107183A1 (zh)

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