CN108806812B - Elevator for loading and unloading reactor fuel assembly - Google Patents
Elevator for loading and unloading reactor fuel assembly Download PDFInfo
- Publication number
- CN108806812B CN108806812B CN201810595430.0A CN201810595430A CN108806812B CN 108806812 B CN108806812 B CN 108806812B CN 201810595430 A CN201810595430 A CN 201810595430A CN 108806812 B CN108806812 B CN 108806812B
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- Prior art keywords
- fuel
- assembly
- lift
- reactor
- receiving device
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- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 23
- 239000000446 fuel Substances 0.000 claims abstract description 139
- 230000005540 biological transmission Effects 0.000 claims description 40
- 238000002955 isolation Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract description 5
- 238000003032 molecular docking Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/11—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with revolving coupling elements, e.g. socket coupling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/105—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with grasping or spreading coupling elements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a lifter for loading and unloading a reactor fuel assembly, which comprises a mounting base, a supporting frame, a lifting driving mechanism, a rotary driving mechanism and a fuel receiving device, wherein the mounting base is mounted on a reactor top cover of a reactor, a fuel access channel for feeding the fuel assembly into the reactor or pouring the fuel assembly out is formed in the mounting base, the supporting frame is mounted at the bottom of the mounting base, the lifting driving mechanism is mounted on the mounting base, the rotary driving mechanism comprises the rotary driving assembly and a guide rail, the upper end of the guide rail passes through the mounting base and is connected with the output end of the rotary driving assembly, the lower end of the guide rail is mounted on the supporting frame, the fuel receiving device is used for receiving the fuel assembly fed by the fuel access channel or required to be replaced, the fuel receiving device is slidably mounted on the guide rail, the lifting driving mechanism is used for driving the fuel receiving device to move up and down, and the rotation of the guide rail can drive the fuel receiving device to rotate between the position corresponding to the fuel access channel and the butt joint position.
Description
Technical Field
The invention relates to the technical field of loading and unloading of reactor fuel assemblies, in particular to an elevator for loading and unloading of reactor fuel assemblies.
Background
The prior art discloses a vertical pulling type loading and unloading fuel elevator for a reactor, which is characterized in that a fuel assembly is loaded and unloaded in the reactor by three driving systems, namely rotation, translation and lifting, so that the occupied space of the elevator in the reactor is large, the operation modes are more, and the reliability of the loading and unloading process of the fuel assembly is reduced; the driving system is driven by a plurality of transmission modes such as chain transmission, screw transmission and the like, so that the transmission reliability of the driving system is reduced; in addition, the chain transmission mode has poor stability and low precision, and reduces the stability of the fuel assembly during loading and unloading.
Disclosure of Invention
The invention aims to provide a lifter for loading and unloading a fuel assembly of a reactor, which can load and unload the fuel assembly without opening a top cover of the reactor, can reduce the occupied space of the lifter in the reactor, and increases the stability and reliability of the loading and unloading process of the fuel assembly.
In order to achieve the above object, the invention provides a lift for loading and unloading a fuel assembly of a reactor, comprising a mounting base, a supporting frame, a lifting driving mechanism, a rotating driving mechanism and a fuel receiving device, wherein the mounting base is mounted on a top cover of the reactor, a fuel access channel for feeding the fuel assembly into the interior of the reactor or pouring the fuel assembly out is formed in the mounting base, the supporting frame is mounted at the bottom of the mounting base, the lifting driving mechanism is mounted on the mounting base, the rotating driving mechanism comprises a rotating driving assembly and a guide rail, the rotating driving assembly is mounted on the mounting base, the upper end of the guide rail is connected with an output end of the rotating driving assembly, the lower end of the guide rail is mounted on the supporting frame, the fuel receiving device is used for receiving the fuel assembly fed or required to be replaced by the fuel access channel, the fuel receiving device is slidably mounted on the guide rail, the lifting driving mechanism is used for driving the fuel receiving device to move up and down, and the rotation of the guide rail can drive the fuel receiving device to rotate between a position corresponding to the fuel access channel and a butting position.
Preferably, the lifter further includes an isolation valve mounted to the fuel inlet and outlet passage.
Preferably, the lifting driving mechanism comprises a lifting driving assembly arranged on the mounting base and a screw rod connected with the output end of the lifting driving assembly, the lower end of the screw rod is arranged on the supporting frame, the lifting driving mechanism further comprises a lifting platform, one side of the lifting platform is arranged on the screw rod, the other side of the lifting platform is arranged on the guide rail and is connected with the fuel receiving device, the screw rod is rotated to drive the lifting of the lifting platform, the lifting of the lifting platform drives the fuel receiving device to lift, and the fuel receiving device can rotate relative to the lifting platform.
Preferably, the lifting platform is connected with the fuel receiving device through screws.
Preferably, the lifting platform is provided with a circular arc screw hole penetrating from top to bottom, the screw penetrates into the circular arc screw hole from bottom to top, and a threaded part at the upper end of the screw is screwed on the fuel receiving device.
Preferably, the lifting driving assembly comprises a first driving motor, a first gear transmission structure connected with the output end of the first driving motor, and a rotating shaft connected with the first gear transmission structure, and the lower end of the rotating shaft is connected with the upper end of the screw rod.
Preferably, the lifting driving mechanism further comprises a first manual driving assembly mounted on the mounting base, the first manual driving assembly comprises a first transmission shaft extending upwards from the mounting base and a second gear transmission structure connected to the lower end of the first transmission shaft, and the second gear transmission structure is meshed with the first gear transmission structure.
Preferably, the support frame has a top plate connected to the bottom of the mounting base, the lower end of the rotating shaft penetrates out of the top plate, a first bearing matched with the rotating shaft is mounted on the top plate, a first connecting shaft sleeve is mounted at the lower end of the mounting base, and the first connecting shaft sleeve is sleeved on the rotating shaft.
Preferably, a limit sleeve is arranged on the lower surface of the top plate, and the limit sleeve is sleeved on the top ends of the rotating shaft and the screw rod.
Preferably, a limiting bearing bush is arranged at the bottom of the supporting frame, and the limiting bearing bush is sleeved at the bottom end of the screw rod.
Preferably, the lifting driving mechanism further comprises a first encoder, and the first encoder is connected with the top end of the rotating shaft to detect the rotation amount of the rotating shaft.
Preferably, the lifting platform is fixedly connected with a screw nut and is connected to the screw through the screw nut.
Preferably, the lower end of the screw is spaced apart from the support frame in an axial direction and is free to accommodate thermal expansion.
Preferably, the rotary driving assembly comprises a second driving motor, a third gear transmission structure connected to an output end of the second driving motor, and a guide rail driving shaft connected with the third gear transmission structure, and an upper end of the guide rail is connected to a lower end of the guide rail driving shaft.
Preferably, the rotation driving mechanism further includes a second encoder connected to a top end of the rail driving shaft to detect a rotation amount of the rail driving shaft.
Preferably, a fixing hole is formed in the side wall of the fuel receiving device, a guide key is arranged in the fixing hole, and the inner end of the guide key abuts against the guide rail.
Preferably, the lower ends of the guide rails are spaced apart from the support frame in an axial direction and are free to accommodate thermal expansion.
Compared with the prior art, the lifter for loading and unloading the reactor fuel assembly is characterized in that when loading is carried out, the fuel receiving device receives the fuel assembly fed by the fuel inlet and outlet channel, then the fuel receiving device is driven to move downwards by the lifting driving mechanism, and the guide rail is driven to rotate by the rotary driving assembly of the rotary driving mechanism so that the fuel receiving device arranged on the guide rail rotates from the position corresponding to the fuel inlet and outlet channel to the butt joint position; when the fuel is changed, the fuel receiving device receives a fuel assembly to be changed at the butt joint position, the guide rail is driven to rotate by the rotary driving assembly of the rotary driving mechanism so that the fuel receiving device rotates from the butt joint position to the position corresponding to the fuel access channel, then the fuel receiving device is driven to move upwards by the lifting driving mechanism, and the fuel assembly is poured out through the fuel access channel; through the cooperation motion of lift actuating mechanism and rotation actuating mechanism to realize carrying out fuel assembly loading and unloading under the condition of not opening the heap top cap, simplified fuel assembly loading and unloading operation process, and reduced the occupation space of lift at the reactor, increased fuel assembly loading and unloading process's stability and reliability simultaneously.
Drawings
Fig. 1 is a schematic view of the structure of an elevator for loading and unloading a reactor fuel assembly according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the structure of another view of fig. 1.
Fig. 3 is a partial structural schematic view of an elevator for loading and unloading a reactor fuel assembly according to an embodiment of the present invention.
Fig. 4 is a schematic view of another part of the structure of the lift for loading and unloading a reactor fuel assembly according to the embodiment of the present invention.
Fig. 5 is a top view of fig. 1.
Fig. 6 is a schematic structural diagram of the working of the embodiment of the invention and the reloading machine in the reactor.
Detailed Description
In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 6, the lift 100 for loading and unloading a fuel assembly of a reactor of the present invention includes a mounting base 1, a supporting frame 2, a lifting driving mechanism, a rotation driving mechanism and a fuel receiving device 5, wherein the mounting base 1 is mounted on a reactor top cover 600 of the reactor, the mounting base 1 is provided with a fuel inlet and outlet channel 11 for feeding or discharging the fuel assembly 61 into or from the reactor, the supporting frame 2 is mounted at the bottom of the mounting base 1, the lifting driving mechanism is mounted on the mounting base 1, the rotation driving mechanism includes a rotation driving assembly 41 and a guide rail 42, the rotation driving assembly 41 is mounted on the mounting base 1, the upper end of the guide rail 42 is connected with the output end of the rotation driving assembly 41, the lower end of the guide rail 42 is mounted on the supporting frame 2, the fuel receiving device 5 is used for receiving the fuel assembly 61 fed or required to be replaced by the fuel inlet and outlet channel 11, the fuel receiving device 5 is slidably mounted on the guide rail 42, the lifting driving mechanism is used for driving the fuel receiving device 5 to move up and down, and the rotation of the guide rail 42 can drive the fuel receiving device 5 to rotate between a position B corresponding to the fuel inlet and outlet channel 11 and a docking position a.
With continued reference to fig. 1-6, the lift 100 of the present embodiment is configured to be assembled and disassembled with the fuel assembly 61 in the reactor in cooperation with the refueling machine 900, and it should be noted that the docking position a refers to a position where the gripping head 91 of the refueling machine 900 is docked with the fuel assembly 61 in the fuel receiving device 5, and the fuel receiving device 5 is rotated to the docking position a to facilitate the gripping head 91 of the refueling machine 900 to grip the fuel assembly 61.
Referring to fig. 1, in the present embodiment, a mounting base 1 is provided with a flange ring 7, the flange ring 7 is provided with a plurality of bolt holes 71, the mounting base 1 is fixed on a stack top cover 600 through bolts 72, the number of the bolts 72 corresponds to the number of the bolt holes 71, and the specific number of the bolt holes 71 is determined according to actual operation; preferably, a sealing process is performed between the lifter 100 and the stack header 600, and the stack header 600 is provided with a sealing groove (not shown) for sealing the radioactive gas of the reactor by placing a sealing material (not shown).
Referring to fig. 1 to 4, specifically, the support frame 2 is a welded structure, and in this embodiment, the support frame 2 is fixed to the mounting base 1 by bolts (not shown), and the support frame 2 provides mounting support for the lifting drive mechanism and the rotation drive mechanism of the lifter 100.
Preferably, the connection between the guide rail 42 and the mounting base 1 is sealed by providing a sealing material.
Preferably, the lower ends of the guide rails 42 are spaced axially from the support frame 2 and are free to accommodate thermal expansion.
Referring to fig. 2, the lift 100 further includes an isolation valve 6, the isolation valve 6 being installed at the fuel inlet/outlet passage 11 to seal the radioactive gas of the reactor; normally, the isolation valve 6 is normally closed to seal, and the isolation valve 6 is opened when the fuel assembly 61 is attached and detached.
Specifically, during loading, an off-stack transport device (not shown) carrying the fuel assembly 61 is docked with the isolation valve 6 to form a channel isolated from the outside, and then the isolation valve 6 is opened, and the off-stack transport device lowers the fuel assembly 61 to the fuel receiving device 5 and closes the isolation valve 6; during unloading, the off-stack handling device is docked with the isolation valve 6 and then the isolation valve 6 is opened, and the off-stack handling device grabs and takes away the fuel assembly 61 loaded on the fuel receiving device 5.
Referring to fig. 1 to 3, the lifting driving mechanism includes a lifting driving assembly 31 mounted on the mounting base 1, a screw rod 32 connected to an output end of the lifting driving assembly 31, a support frame 2 mounted on a lower end of the screw rod 32, a lifting platform 33 mounted on one side of the screw rod 32 and on the other side of the screw rod 32 and connected to the fuel receiving device 5, wherein rotation of the screw rod 32 drives lifting of the lifting platform 33, lifting of the lifting platform 33 drives lifting of the fuel receiving device 5, and the fuel receiving device 5 can rotate relative to the lifting platform 33.
Specifically, the jacking platform 33 is fixedly connected with the screw nut 321 and is connected to the screw 32 through the screw nut 321.
Preferably, the connection between the screw 32 and the mounting base 1 is sealed by providing a sealing material.
Preferably, the lower end of the screw 32 is spaced axially from the support frame 2 and is free to accommodate thermal expansion.
Specifically, the lifting platform 33 is connected with the fuel receiving device 5 through a screw 34, the lifting platform 33 is provided with a circular arc screw hole 331 penetrating vertically, the screw 34 penetrates into the circular arc screw hole 331 from bottom to top, and a threaded part at the upper end of the screw 34 is screwed on the fuel receiving device 5.
With continued reference to fig. 1 to 3, the lifting driving assembly 31 includes a first driving motor 311, a first gear transmission structure 312 connected to an output end of the first driving motor 311, and a rotating shaft 313 connected to the first gear transmission structure 312, wherein a lower end of the rotating shaft 313 is connected to an upper end of the screw 32.
Specifically, the first driving motor 311 drives the rotation shaft 313 to rotate through the first gear transmission structure 312 to drive the screw rod 32 to rotate, and then converts the rotation motion of the screw rod 32 into the lifting motion of the lifting platform 33 through the screw rod nut 321, and the lifting of the lifting platform 33 drives the fuel receiving device 5 connected with the lifting platform 33 to lift.
With continued reference to fig. 1 to 3, the lifting driving mechanism further includes a first encoder 35, where the first encoder 35 is connected to a top end of the rotating shaft 313 to detect a rotation amount of the rotating shaft 313.
Referring to fig. 1 and 3, the lifting driving mechanism further includes a first manual driving assembly 36 mounted on the mounting base 1, the first manual driving assembly 36 includes a first transmission shaft 361 extending upward from the mounting base 1 and a second gear transmission structure 362 connected to a lower end of the first transmission shaft 361, and the second gear transmission structure 362 is meshed with the first gear transmission structure 312.
Specifically, the second gear transmission structure 362 is driven to rotate by the first transmission shaft 361, the second gear transmission structure 362 is meshed with the first gear transmission structure 312 to drive the rotation shaft 313 to rotate so as to drive the screw rod 32 to rotate, and then the screw rod nut 321 is used for converting the rotation motion of the screw rod 32 into the lifting motion of the lifting platform 33, and the lifting of the lifting platform 33 drives the fuel receiving device 5 connected with the lifting platform 33 to lift.
Referring to fig. 1, the support frame 2 has a top plate 21 connected to the bottom of the installation base 1, the lower end of the rotating shaft 313 extends out from the top plate 21, a first bearing 322 matched with the rotating shaft 313 is mounted on the top plate 21, a first connecting shaft sleeve 323 is mounted at the lower end of the installation base 1, and the first connecting shaft sleeve 323 is sleeved on the rotating shaft 313; the lower surface of roof 21 is provided with spacing sleeve 324, and spacing sleeve 324 cover is established on the top of pivot 313 and lead screw 32, and spacing sleeve 324 plays spacing effect on to holding up the platform 33, and the bottom of braced frame 2 is provided with spacing axle bush 325, and spacing axle bush 325 cover is established in the bottom of lead screw 32, and spacing axle bush 325 plays spacing effect down to holding up the platform 33.
Referring to fig. 1 and 4, the rotary driving assembly 41 includes a second driving motor 411, a third gear transmission structure 412 connected to an output end of the second driving motor 411, and a rail driving shaft 413 connected to the third gear transmission structure 412, wherein an upper end of the rail 42 is connected to a lower end of the rail driving shaft 413; the second driving motor 411 drives the guide rail driving shaft 413 to rotate through the third gear transmission structure 412 to drive the guide rail 42 to rotate, and the rotation of the guide rail 42 can drive the fuel receiving device 5 to rotate between the position B corresponding to the fuel inlet and outlet channel 11 and the docking position a.
With continued reference to fig. 1 and 4, preferably, a second bearing 414 is mounted on the top plate 21 and cooperates with the lower end of the guide rail driving shaft 413, and a second connecting sleeve 415 is mounted on the lower end of the mounting base 1, and the second connecting sleeve 415 is sleeved on the guide rail driving shaft 413.
Referring to fig. 4, the rotary driving mechanism further includes a second encoder 43, and the second encoder 43 is connected to a top end of the rail driving shaft 413 to detect a rotation amount of the rail driving shaft 413.
With continued reference to fig. 4, the rotary drive mechanism further includes a second manual drive assembly 44 mounted on the mounting base 1, the second manual drive assembly 44 including a second drive shaft 441 extending upwardly from the mounting base 1 and a fourth gear transmission structure 442 connected to a lower end of the second drive shaft 441, the fourth gear transmission structure 442 being engaged with the third gear transmission structure 412.
Specifically, the second transmission shaft 441 drives the fourth gear transmission structure 442 to rotate, and the fourth gear transmission structure 442 and the third gear transmission structure 412 mesh to drive the rail driving shaft 413 to rotate to drive the rail 42 to rotate, so that the rotation of the rail 42 can drive the fuel receiving device 5 to rotate between the position B corresponding to the fuel inlet/outlet channel 11 and the docking position a.
Referring to fig. 1, a fixing hole is formed in a side wall of the fuel receiving device 5, a guide key 52 is installed in the fixing hole, and an inner end of the guide key 52 abuts against the guide rail 42.
Referring to fig. 1-6, the steps of the fuel assembly loading and unloading operation of the elevator 100 of the present invention in cooperation with the reactor and the reloader 900 are specifically described as follows:
and (3) charging:
first, the off-stack handling device interfaces with the isolation valve 6;
then, the off-stack handling device lowers the fuel assembly 61 to the fuel receiving device 5 by opening the isolation valve 6;
then, the lifting driving assembly 31 drives the screw rod 32 to rotate so as to enable the lifting platform 33 to move downwards, thereby driving the fuel receiving device 5 to move downwards to the height corresponding to the docking position A, and at the same time, closing the isolation valve 6, and disconnecting the off-stack transport device from the isolation valve 6;
then, the rotary driving assembly 41 drives the guide rail 42 to rotate so as to enable the fuel receiving device 5 to rotate along with the guide rail, and the fuel receiving device 5 rotates from the position B corresponding to the fuel inlet and outlet channel 11 to the abutting position A;
finally, the gripping head 91 of the reloader 900 grips the fuel assembly 61 for loading.
And (3) unloading:
first, the gripping head 91 of the refueling machine 900 grips the fuel assemblies 61 to be replaced and is placed on the fuel receiving device 5 at the docking position a;
then, the rotary driving assembly 41 drives the guide rail 42 to rotate so as to enable the fuel receiving device 5 to rotate along with the guide rail, and the fuel receiving device 5 rotates from the docking position A to the position B corresponding to the fuel inlet and outlet channel 11;
then, the lifting driving assembly 31 drives the screw rod 32 to rotate so as to enable the lifting platform 33 to move upwards, thereby driving the fuel receiving device 5 to move upwards, and simultaneously, the off-stack transporting device is in butt joint with the isolation valve 6, and the isolation valve 6 is opened;
finally, the off-stack handling device takes the fuel assembly 61 away, closes the isolation valve 6, and disengages the off-stack handling device from the isolation valve 6.
In summary, in the lift 100 for loading and unloading a fuel assembly of a reactor according to the present invention, during loading, the fuel receiving device 5 receives the fuel assembly 61 fed from the fuel inlet and outlet passage 11, and then drives the fuel receiving device 5 to move downward by the lift driving mechanism, and drives the guide rail 42 to rotate by the rotation driving assembly 41 of the rotation driving mechanism so that the fuel receiving device 5 mounted on the guide rail 42 rotates from the position B corresponding to the fuel inlet and outlet passage 11 to the docking position a; during refueling, the fuel receiving device 5 receives the fuel assembly 61 to be replaced at the docking position A, the guide rail 42 is driven to rotate by the rotary driving assembly 41 of the rotary driving mechanism so that the fuel receiving device 5 rotates from the docking position A to the position B corresponding to the fuel inlet and outlet channel 11, then the fuel receiving device 5 is driven to move upwards by the lifting driving mechanism, and the fuel assembly 61 is poured out through the fuel inlet and outlet channel 11; by the cooperative movement of the lift driving mechanism and the rotation driving mechanism, the loading and unloading of the fuel assemblies 61 is performed without opening the stack top cover 600, the loading and unloading operation process of the fuel assemblies 61 is simplified, the occupied space of the lift 100 in the reactor is reduced, and the stability and reliability of the loading and unloading process of the fuel assemblies 61 are increased.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (15)
1. An elevator for loading and unloading a reactor fuel assembly, comprising:
the installation base is installed on a reactor top cover of the reactor, and a fuel inlet and outlet channel for feeding the fuel assembly into the reactor or pouring the fuel assembly out is formed in the installation base;
the support frame is arranged at the bottom of the mounting base;
the lifting driving mechanism is arranged on the mounting base;
the rotary driving mechanism comprises a rotary driving assembly and a guide rail, the rotary driving assembly is arranged on the mounting base, the upper end of the guide rail is connected with the output end of the rotary driving assembly, and the lower end of the guide rail is arranged on the supporting frame;
the fuel receiving device is used for receiving the fuel assembly fed by the fuel inlet and outlet channel or needing to be replaced, the fuel receiving device is slidably arranged on the guide rail, the lifting driving mechanism is used for driving the fuel receiving device to move up and down, and the rotation of the guide rail can drive the fuel receiving device to rotate between a position corresponding to the fuel inlet and outlet channel and a butting position;
the lifting driving mechanism comprises a lifting driving assembly arranged on the mounting base, a screw rod connected with the output end of the lifting driving assembly, the lower end of the screw rod is arranged on the supporting frame, the lifting driving mechanism further comprises a lifting platform, one side of the lifting platform is arranged on the screw rod, the other side of the lifting platform is arranged on the guide rail and is connected with the fuel receiving device, the rotation of the screw rod drives the lifting of the lifting platform, the lifting of the lifting platform drives the fuel receiving device to lift, and the fuel receiving device can rotate relative to the lifting platform;
the lifting platform is fixedly connected with the screw nut and is connected to the screw through the screw nut.
2. The lift for reactor fuel assembly handling of claim 1, further comprising an isolation valve mounted to the fuel access passage.
3. The lift for loading and unloading a reactor fuel assembly of claim 1, wherein the lift platform is connected to the fuel receiving device by screws.
4. A lifter for loading and unloading a fuel assembly of a reactor according to claim 3, wherein the lifting platform is provided with a circular arc screw hole penetrating from top to bottom, the screw penetrates into the circular arc screw hole from bottom to top, and a screw thread part at the upper end of the screw is screwed on the fuel receiving device.
5. The lift for loading and unloading a reactor fuel assembly of claim 1, wherein the lift driving assembly includes a first driving motor, a first gear transmission structure connected to an output end of the first driving motor, and a rotating shaft connected to the first gear transmission structure, a lower end of the rotating shaft being connected to an upper end of the screw.
6. The lift for reactor fuel assembly handling of claim 5, wherein the lift drive mechanism further comprises a first manual drive assembly mounted on the mounting base, the first manual drive assembly including a first drive shaft extending upwardly from the mounting base and a second gear structure connected to a lower end of the first drive shaft, the second gear structure engaging the first gear structure.
7. The lift for loading and unloading a reactor fuel assembly of claim 5, wherein the support frame has a top plate connected to a bottom of the mounting base, a lower end of the rotating shaft is penetrated out of the top plate, a first bearing matched with the rotating shaft is mounted on the top plate, a first connecting shaft sleeve is mounted at a lower end of the mounting base, and the first connecting shaft sleeve is sleeved on the rotating shaft.
8. The lift for loading and unloading a reactor fuel assembly of claim 7, wherein a lower surface of the top plate is provided with a limit sleeve, and the limit sleeve is sleeved on top of the rotating shaft and the screw rod.
9. The lift for loading and unloading a reactor fuel assembly of claim 8, wherein the bottom of the support frame is provided with a limiting bushing sleeved at the bottom end of the lead screw.
10. The lift for loading and unloading a reactor fuel assembly of claim 5, wherein the lift drive mechanism further comprises a first encoder coupled to a top end of the shaft to detect an amount of rotation of the shaft.
11. The lift for loading and unloading a reactor fuel assembly of claim 1, wherein a lower end of the lead screw is axially spaced from the support frame and is free.
12. The lift for reactor fuel assembly handling of claim 1, wherein the rotary drive assembly includes a second drive motor, a third gear transmission structure connected to an output end of the second drive motor, and a rail drive shaft connected to the third gear transmission structure, an upper end of the rail being connected to a lower end of the rail drive shaft.
13. The lift for reactor fuel assembly handling of claim 12, wherein the rotary drive mechanism further comprises a second encoder coupled to a top end of the rail drive shaft to detect an amount of rotation of the rail drive shaft.
14. The lift for loading and unloading a reactor fuel assembly of claim 1, wherein a side wall of the fuel receiving assembly is provided with a fixing hole, a guide key is arranged in the fixing hole, and an inner end of the guide key abuts against the guide rail.
15. The lift for loading and unloading a reactor fuel assembly of claim 1, wherein the lower ends of the guide rails are axially spaced from the support frame and are free.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810595430.0A CN108806812B (en) | 2018-06-11 | 2018-06-11 | Elevator for loading and unloading reactor fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810595430.0A CN108806812B (en) | 2018-06-11 | 2018-06-11 | Elevator for loading and unloading reactor fuel assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108806812A CN108806812A (en) | 2018-11-13 |
| CN108806812B true CN108806812B (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810595430.0A Active CN108806812B (en) | 2018-06-11 | 2018-06-11 | Elevator for loading and unloading reactor fuel assembly |
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| CN111667934B (en) * | 2020-06-19 | 2022-04-15 | 中国核动力研究设计院 | Loading and unloading method for layered arrangement driving mechanism of nuclear reactor test reactor |
| CN111667935A (en) * | 2020-06-19 | 2020-09-15 | 中国核动力研究设计院 | Integral dismounting device for inversion type driving mechanism of nuclear reactor |
| CN114155984B (en) * | 2021-11-22 | 2024-09-06 | 中国原子能科学研究院 | Valve core receiving and disassembling device |
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