CN116417163A - Fuel assembly locking pipe dismounting equipment - Google Patents
Fuel assembly locking pipe dismounting equipment Download PDFInfo
- Publication number
- CN116417163A CN116417163A CN202111660863.8A CN202111660863A CN116417163A CN 116417163 A CN116417163 A CN 116417163A CN 202111660863 A CN202111660863 A CN 202111660863A CN 116417163 A CN116417163 A CN 116417163A
- Authority
- CN
- China
- Prior art keywords
- fuel assembly
- rod
- removal apparatus
- set forth
- locking pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 210000000078 claw Anatomy 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
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
- G21C19/26—Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof
-
- 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
-
- 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
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel 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
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
- G21C19/207—Assembling, maintenance or repair of reactor components
-
- 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention belongs to the field of special maintenance of fuel assemblies, and particularly relates to a locking pipe dismounting device of a fuel assembly. The lifting ring is connected with the claw opening and closing adjusting mechanism, the claw opening and closing adjusting mechanism is connected with the extension rod, a core rod is arranged in the extension rod, the core rod is sleeved with the sliding hammer, and the end part of the core rod is connected with the dismounting head. The invention has the beneficial effects that: the invention can realize the dismantling and installation of the locking pipe of the upper pipe seat of the fuel assembly under water by long-distance operation; the invention can effectively avoid the unexpected falling of the locking pipe in the process of disassembly or assembly, and the locking pipe can be removed together with the equipment after being disassembled; the invention can provide a certain external force in the process of installing and dismantling the locking pipe so as to ensure that the locking pipe overcomes the bulging force in the process of dismantling.
Description
Technical Field
The invention belongs to the field of special maintenance of fuel assemblies, and particularly relates to a locking pipe dismounting device of a fuel assembly. In particular to equipment for implementing maintenance work on the fuel assembly of the AP1000 unit and dismantling and reinstalling the locking pipe of the upper pipe seat.
Background
The fuel assembly of the nuclear power station is influenced by various factors such as water flow impact, vibration, irradiation and the like in the running and using process, and has a certain damage rate. If the fuel rod is damaged, fission products can leak, so that the radioactivity level of a primary loop is increased, and the economy and the safety of the nuclear power station are affected. Therefore, it is necessary to repair the damaged fuel assembly which does not reach the burnup depth, replace the damaged fuel rod, and ensure safe and reliable operation of the reactor.
The upper tube seat of the AP1000 fuel assembly is connected with the guide sleeve through expansion connection of the locking tubes, and when the upper tube seat of the fuel assembly needs to be removed, 24 locking tubes must be removed first.
Because the fuel assembly has stronger radiation, water is usually used as a shielding layer, and the fuel assembly is generally regulated to keep a safe distance of 3 meters from the water surface, the disassembly and assembly equipment also meets the requirement of remote operation under water, and in addition, the locking pipe cannot fall into a water tank to become foreign matters after being disassembled, so the disassembly and assembly equipment also has the function of transferring the locking pipe, and the locking pipe of the upper pipe seat is not allowed to fall in the transferring process.
The invention relates to a fuel assembly upper tube seat locking tube dismounting device which can realize remote dismounting of an underwater upper tube seat locking tube.
Disclosure of Invention
The invention aims to provide a fuel assembly upper tube seat locking tube dismounting device which is used for dismounting and transferring a fuel assembly upper tube seat locking tube under water.
The technical scheme of the invention is as follows: the utility model provides a fuel assembly's locking pipe dismouting equipment, includes rings, jack catch adjustment mechanism that opens and shuts, extension bar, core bar, sliding hammer and dismouting head, rings and jack catch adjustment mechanism that opens and shuts are connected, and jack catch adjustment mechanism that opens and shuts is connected with the extension bar, is equipped with the core bar in the extension bar, and the core bar overcoat is equipped with the sliding hammer, the end connection dismouting head of core bar.
The hanging ring is connected with the claw opening and closing adjusting mechanism through a screw.
The clamping jaw opening and closing adjusting mechanism comprises a compression spring, a middle rod, an adjusting block and a fixing seat; the compression spring is sleeved on the middle rod, one end of the middle rod is fixed through a nut, a baffle plate is arranged between the nut and the end part of the middle rod, the middle rod penetrates through the adjusting block, one end of the compression spring is in contact with the baffle plate, the other end of the compression spring is in contact with the upper end face of the adjusting block, and a fixing seat is arranged at the lower part of the adjusting block.
The fixing seat is provided with two positioning pin holes at intervals of 90 degrees, and the positions of the pin holes correspond to the positioning pins.
One end of the extension bar is connected with the lower part of the fixed seat.
The dismounting head is arranged on the extension bar through a screw.
The upper end of the adjusting block is provided with a groove, and one end of the compression spring is arranged in the groove.
The dismounting head comprises a claw and a guide rod, the claw is sleeved outside the core bar, a locking pipe is sleeved outside the claw, and the end part of the locking pipe is connected with the guide rod.
The end part of the core rod is sleeved with a locking block.
The locking block is positioned between the clamping jaw and the guide rod.
The invention has the beneficial effects that: the invention can realize the dismantling and installation of the locking pipe of the upper pipe seat of the fuel assembly under water by long-distance operation; the invention can effectively avoid the unexpected falling of the locking pipe in the process of disassembly or assembly, and the locking pipe can be removed together with the equipment after being disassembled; the invention can provide a certain external force in the process of installing and dismantling the locking pipe so as to ensure that the locking pipe overcomes the bulging force in the process of dismantling.
Drawings
FIG. 1 is a schematic view of a fuel assembly locking tube assembly and disassembly apparatus according to the present invention;
FIG. 2 is a schematic diagram of a jaw opening and closing adjustment mechanism;
FIG. 3 is a schematic view of a fixing base;
fig. 4 is a schematic view of a mounting/dismounting head.
In the figure: 1 lifting ring, 2 claw opening and closing adjusting mechanism, 3 extension bar, 4 core bar, 5 sliding hammer, 6 dismounting head, 7 compression spring, 8 locating pin, 9 adjusting blocks, 10 fixing seats, 11 clamping jaws, 12 locking blocks, 13 guide rods, 14 intermediate rods, 15 baffle plates and 16 locking pipes.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The disassembly and assembly device for the locking pipe of the upper pipe seat of the fuel assembly comprises a lifting ring 1, a claw opening and closing adjusting mechanism 2, an extension rod 3, a core rod 4, a sliding hammer 5 and a disassembly and assembly head 6.
The invention relates to a long rod operating tool, wherein the lengthening rod 3 can effectively ensure the length distance requirement of personnel operation, and can realize the remote disassembly and assembly of an upper tube seat locking tube under water. The exposed extension rod 3 and the core rod 4 form an inner layer structure and an outer layer structure of the tool, the outer layer provides support for the tool, and the inner layer core rod 4 can control the opening and closing of the clamping jaws on the dismounting head 6 through the adjusting structure 2 at the upper end part of the inner layer core rod. The jaw opening and closing adjusting mechanism 2 is connected with the core bar 4, the opening or closing state of the jaw in the dismounting head 6 can be adjusted by adjusting the movement of the core bar 4, and the state can be maintained after adjustment. The jaw opening and closing adjusting mechanism 2 has two working positions, one working position can enable the core rod 4 to move downwards to enable the jaws to open, finally lock the locking pipe, and the other working position can enable the core rod to move upwards to enable the jaws to retract, and finally release the locking pipe. Since a certain external force is required for connection or detachment of the locking pipe to be implemented and the expansion pipe, a slide weight 5 is provided at the upper part of the apparatus to assist in the disassembly and assembly work. When the claw is opened, the clamping of the upper pipe seat locking pipe is realized, so that the upper pipe seat locking pipe moves together with the device, and when the claw is closed, the upper pipe seat locking pipe can be released.
As shown in fig. 1, the locking pipe disassembly and assembly device of the fuel assembly comprises a lifting ring 1, a claw opening and closing adjusting mechanism 2, an extension rod 3, a core bar 4, a sliding hammer 5 and a disassembly and assembly head 6, wherein the lifting ring 1 is connected with the claw opening and closing adjusting mechanism 2 through screws, the extension rod 3 and the core bar 4 form an inner layer and outer layer structure of the device, the outer layer extension rod 3 provides support for the device, and the inner layer core bar 4 can control the opening and the closing of the claw 11 on the disassembly and assembly head 6 when moving up and down.
As shown in fig. 2 and 3, the jaw opening and closing adjusting mechanism 2 comprises a compression spring 7, a positioning pin 8, an adjusting block 9, a fixed seat 10, a middle rod 14 and a baffle 15; the compression spring 7 is sleeved on the middle rod 14, one end of the middle rod 14 is fixed through a nut, a baffle 15 is arranged between the nut and the end part of the middle rod 14, the middle rod 14 passes through the adjusting block 9, one end of the compression spring 7 is contacted with the baffle 15, the other end of the compression spring 7 is contacted with the end face of a groove arranged on the upper end face of the adjusting block 9, a fixing seat 10 is arranged at the lower part of the adjusting block 9, and the fixing seat 10 is connected with a lifting lug of the lifting ring 1 through a screw. In a natural state, the compression spring 7 compresses the adjusting block 9 and the fixed seat 10; the positioning pin 8 is fixed on the adjusting block 9; two positioning pin holes are arranged on the fixing seat 10 at intervals of 90 degrees, one is deep and the other is shallow, and the positions of the pin holes correspond to the positioning pins 8.
As shown in fig. 4, the dismounting head 6 comprises a claw 11, a locking block 12 and a guide rod 13; the dismounting head 6 comprises a claw 11 and a guide rod 13, the claw 11 is sleeved outside the core bar 4, a locking pipe 16 is sleeved outside the claw 11, and the end part of the locking pipe 16 is connected with the guide rod 13. The end part of the core rod 4 is sleeved with a locking block 12. The locking block 12 is positioned between the claw 11 and the guide rod 13.
The disassembling and assembling head 6 is arranged on the lengthening bar 3 through a screw, the core bar 4 penetrates into the disassembling and assembling head 6, and different positions of the core bar can be controlled by adjusting positions of different pin holes of the adjusting block 9 on the fixing seat 10, so that the clamping jaws 11 are controlled to open and close.
The fuel assembly upper tube seat locking tube removing process comprises the following steps:
the device is moved to the upper part of the upper tube seat of the fuel assembly, the dismounting head 6 is aligned with the upper tube seat locking tube to be dismounted, the device is slowly arranged below the dismounting head, a clamping block of the guide rod 13 falls into the upper tube seat locking tube, the clamping jaw 11 is opened by the rear adjusting jaw opening and closing adjusting mechanism 2, the upper tube seat locking tube is clamped at the moment, and the locking tube can be dismounted by lifting the tool and assisting in operating the sliding hammer 5 to apply force upwards. Then the device is transferred at the moment, the upper tube seat locking tube is removed along with the device, and the claw 11 is closed after the device is transferred to a safe position, so that the locking tube can be released;
the installation process of the fuel assembly upper tube seat locking tube comprises the following steps: after grabbing the locking tube, the claw 11 is opened, the device and the locking tube are transferred to the upper tube seat, the device is slowly dropped down by aligning with a screw hole on the upper tube seat, the claw 11 is closed by adjusting the claw opening and closing adjusting mechanism 2, a tool is pressed down, the sliding hammer 5 is assisted to be operated for downward force application, the locking tube is gradually installed on the upper tube seat, and then the device is lifted to be removed.
Claims (10)
1. A fuel assembly locking tube removal apparatus, characterized in that: the lifting ring is connected with the claw opening and closing adjusting mechanism, the claw opening and closing adjusting mechanism is connected with the extension rod, a core rod is arranged in the extension rod, the core rod is sleeved with the sliding hammer, and the end part of the core rod is connected with the dismounting head.
2. A fuel assembly locking tube removal apparatus as set forth in claim 1, wherein: the hanging ring is connected with the claw opening and closing adjusting mechanism through a screw.
3. A fuel assembly locking tube removal apparatus as set forth in claim 1, wherein: the clamping jaw opening and closing adjusting mechanism comprises a compression spring, a middle rod, an adjusting block and a fixing seat; the compression spring is sleeved on the middle rod, one end of the middle rod is fixed through a nut, a baffle plate is arranged between the nut and the end part of the middle rod, the middle rod penetrates through the adjusting block, one end of the compression spring is in contact with the baffle plate, the other end of the compression spring is in contact with the upper end face of the adjusting block, and a fixing seat is arranged at the lower part of the adjusting block.
4. A fuel assembly locking tube removal apparatus as set forth in claim 3 wherein: the fixing seat is provided with two positioning pin holes at intervals of 90 degrees, and the positions of the pin holes correspond to the positioning pins.
5. A fuel assembly locking tube removal apparatus as set forth in claim 3 wherein: one end of the extension bar is connected with the lower part of the fixed seat.
6. A fuel assembly locking tube removal apparatus as set forth in claim 3 wherein: the dismounting head is arranged on the extension bar through a screw.
7. A fuel assembly locking tube removal apparatus as set forth in claim 3 wherein: the upper end of the adjusting block is provided with a groove, and one end of the compression spring is arranged in the groove.
8. A fuel assembly locking tube removal apparatus as set forth in claim 1, wherein: the dismounting head comprises a claw and a guide rod, the claw is sleeved outside the core bar, a locking pipe is sleeved outside the claw, and the end part of the locking pipe is connected with the guide rod.
9. A fuel assembly locking tube removal apparatus as set forth in claim 8, wherein: the end part of the core rod is sleeved with a locking block.
10. A fuel assembly locking tube removal apparatus as set forth in claim 9, wherein: the locking block is positioned between the clamping jaw and the guide rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111660863.8A CN116417163A (en) | 2021-12-31 | 2021-12-31 | Fuel assembly locking pipe dismounting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111660863.8A CN116417163A (en) | 2021-12-31 | 2021-12-31 | Fuel assembly locking pipe dismounting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116417163A true CN116417163A (en) | 2023-07-11 |
Family
ID=87055080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111660863.8A Pending CN116417163A (en) | 2021-12-31 | 2021-12-31 | Fuel assembly locking pipe dismounting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116417163A (en) |
-
2021
- 2021-12-31 CN CN202111660863.8A patent/CN116417163A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4292133A (en) | Method of and apparatus for replacing control rod drive | |
| CN110744492B (en) | Remote bolt dismantling and automatic grabbing tool and application method thereof | |
| EP1209692B1 (en) | Module type device and method for underwater repair | |
| CN109955190B (en) | Be used for remote locking destruction under water, bolt screwing assembly and disassembly tools | |
| CN110176321B (en) | Method and device for replacing guide cylinder of reactor control rod | |
| CN116417163A (en) | Fuel assembly locking pipe dismounting equipment | |
| CN111710449A (en) | Device for replacing radioactive waste filter element of ocean nuclear power platform | |
| CN207663807U (en) | A kind of auxiliary mounting tool of irradiation blockage | |
| CN111397427A (en) | Installation device for vertical tube plate positioner of heat exchanger | |
| US5699397A (en) | Tool for vertically supporting tie rod assembly against clevis pin on gusset plate in boiling water reactor | |
| CN112917427B (en) | A draw gear that is used for stabiliser electric heating element to demolish | |
| CN107902591A (en) | A kind of nuclear power plant shields door frame mounting tool | |
| CN209820246U (en) | Installation device for vertical tube plate positioner of heat exchanger | |
| CN207718837U (en) | A kind of underwater attaching/detaching apparatus of upper pipe seat of fuel component | |
| CN208327249U (en) | A kind of nuclear power plant's shielding door frame mounting tool | |
| CN209071003U (en) | A kind of irradiation blockage auxiliary disassembling tool | |
| CN210414398U (en) | Mounting tool is rectified in flange centering | |
| CN109515656B (en) | Emergent instrument of retrieving of control module under water | |
| CN216078538U (en) | VVER nuclear power station hydraulic control butterfly valve locking device | |
| CN116665937A (en) | Device and method for repairing fuel assembly | |
| CN115008190B (en) | Assembling process of tubular turbine water guide mechanism | |
| CN217842830U (en) | Adjustable back pressure valve for nuclear power equipment | |
| CN217453776U (en) | Inner hole type bearing detaching tool | |
| CN213988321U (en) | Be used for long-range extraction instrument under water of spent fuel storage grillwork neutron absorber | |
| CN219799865U (en) | Underground optical cable fixing and unlocking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |