CN110993130B - Fuel assembly simulation device with adjustable clamping force of fuel rod - Google Patents
Fuel assembly simulation device with adjustable clamping force of fuel rod Download PDFInfo
- Publication number
- CN110993130B CN110993130B CN201911396486.4A CN201911396486A CN110993130B CN 110993130 B CN110993130 B CN 110993130B CN 201911396486 A CN201911396486 A CN 201911396486A CN 110993130 B CN110993130 B CN 110993130B
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- Prior art keywords
- clamping force
- fuel
- fixed
- tube seat
- grid
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Clamps And Clips (AREA)
Abstract
The invention relates to the technical field of nuclear power overhaul, and particularly discloses a fuel assembly simulation device with an adjustable clamping force of a fuel rod. The overall external dimension and the main structure connection mode of the simulation device are consistent with those of a real fuel assembly; the clamping force adjusting mechanism comprises a fixed protrusion and a movable protrusion which are perpendicular to each other, and the movable protrusion is supported by a spring and can adjust the compression amount applied to the movable protrusion; the clamping force adjusting mechanisms can be positioned and installed on the grids, and the fixed protrusions and the movable protrusions in the two clamping force adjusting mechanisms can clamp and fix the fuel rods and can change the clamping force on the fuel rods by adjusting the force applied to the movable protrusions. The fuel assembly simulation device with the adjustable clamping force of the fuel rod can be used for assembling and disassembling the upper tube seat for multiple times, and meets the requirements of long-term fuel repair tests and training; meanwhile, the clamping force of the fuel rod can be adjusted, and the simulation of the clamping condition of the real fuel rod is met.
Description
Technical Field
The invention belongs to the technical field of nuclear power overhaul, and particularly relates to a fuel assembly simulation device with an adjustable clamping force of a fuel rod.
Background
The fuel assembly repair single rod replacement technology is a method for effectively realizing assembly repair. In order to verify the effectiveness of the fuel repair operation tool and to improve the operator's skill, a simulation of the operation flow using a fuel assembly simulator is required. The test process involves the operations of removing the upper tube seat screw, pulling out the single rod and the like, and in order to approach the actual situation, the designed assembly simulation body needs to have certain clamping force on the fuel rod. In addition, after the fuel assembly is dismantled many times, 24 guide tubes are fragile, cause the screw jam, and the special structure of guide tube makes it nonremovable, and once the guide tube is damaged, this subassembly simulator will not satisfy the demand of subassembly repair test and training. It is therefore necessary to design the upper end of the guide tube in a removable configuration to allow for quick replacement of the guide tube spare parts after the threads are damaged to maintain the integrity of the assembly simulator.
Disclosure of Invention
The invention aims to provide a fuel assembly simulation device with adjustable clamping force of a fuel rod, which can meet the requirements of multiple tests and training for repairing a fuel assembly.
The technical scheme of the invention is as follows: the fuel assembly simulation device with adjustable clamping force of the fuel rod comprises an upper tube seat, guide tubes, a grid, the fuel rod, a lower tube seat and a clamping force adjusting mechanism, wherein a plurality of guide tubes are arranged between the lower tube seat and the upper tube seat; a plurality of grids are arranged between the upper tube seat and the lower tube seat in parallel; holes which are distributed in the same way as the real grids are arranged on the grids; a plurality of fuel rods are supported on the fixed grid and are parallel to the guide pipes; the overall external dimension and the main structure connection mode of the fuel assembly simulation device formed by the upper tube seat, the grid, the fuel rods and the lower tube seat are consistent with those of a real fuel assembly; the clamping force adjusting mechanism comprises a fixed protrusion and a movable protrusion which are perpendicular to each other, and the movable protrusion is supported by a spring and can adjust the compression amount applied to the movable protrusion; the clamping force adjusting mechanisms can be positioned and installed on the grids, and the fixed protrusions and the movable protrusions in the two clamping force adjusting mechanisms can clamp and fix the fuel rods and can change the clamping force on the fuel rods by adjusting the force applied to the movable protrusions.
The clamping force adjusting mechanism comprises a contact ball head, a compression spring, an adjusting screw and a shell, wherein a cavity structure is arranged at the upper part of the shell, a hole is formed in the front end of the cavity structure, and the contact ball head penetrates through the hole of the cavity structure to form a movable protrusion; the cavity structure is internally provided with a compression spring, the compression spring is limited between the contact ball head and the adjusting screw through the adjusting screw, and the position of the adjusting screw in the cavity structure can be adjusted so as to change the pressure of the compression spring on the contact ball head.
The end part of the shell close to the contact ball head is provided with a bulge structure, the axial direction of the bulge structure is perpendicular to the axis of the contact ball head, and a fixing bulge is formed.
The clamping force adjusting mechanism also comprises a locating pin and a screw rod, wherein the locating pin and the screw rod are arranged at the lower part of the shell, and the distance and the size between the locating pin and the screw rod are matched with the hole pitch interval on the grid; the shell can be positioned on the hole site of the grid through the locating pin, and the shell is fastened on the grid through the nut and the screw rod.
The two clamping force adjusting mechanisms are fixed on adjacent sides of the grid, wherein the movable protrusions in the first clamping force adjusting mechanism are opposite to the fixed protrusions in the second clamping force adjusting mechanism and are on the same axis.
The guide tube comprises a detachable sleeve, a nut and a fixed sleeve, wherein a boss is arranged at the lower end of the detachable sleeve, the nut is sleeved on the boss and is in matched connection with a threaded section at the upper end of the fixed sleeve, and the lower end of the detachable sleeve is fixedly connected with the upper end of the fixed sleeve by the nut.
The upper end of the detachable sleeve is fixed with the upper tube seat through an upper tube seat screw; the lower end of the fixed sleeve is fixedly connected with the grid.
The lower end of the fixed sleeve and the grid are welded and fixed to form an integrated structure.
The invention has the remarkable effects that: the fuel assembly simulation device with the adjustable clamping force of the fuel rod can be used for assembling and disassembling the upper tube seat for multiple times, and meets the requirements of long-term fuel repair tests and training; meanwhile, the clamping force of the fuel rod can be adjusted, and the simulation of the clamping condition of the real fuel rod is met.
Drawings
FIG. 1 is a schematic diagram of a fuel assembly simulator with adjustable clamping force for fuel rods according to the present invention;
FIG. 2 is a schematic view of a guide tube in a fuel assembly simulator with adjustable clamping force for fuel rods according to the present invention;
FIG. 3 is a schematic diagram illustrating the installation of a clamping force adjustment mechanism in a fuel assembly simulation device with adjustable clamping force of a fuel rod according to the present invention;
FIG. 4 is a top view of a clamping force adjustment mechanism in a fuel assembly simulation device with adjustable clamping force for fuel rods according to the present invention;
FIG. 5 is a front view of a clamping force adjustment mechanism in a fuel assembly simulation device with adjustable clamping force for fuel rods according to the present invention;
In the figure: 1. an upper tube seat; 2. a guide tube; 3. a grid; 4. a fuel rod; 5. a lower tube seat; 6. a clamping force adjusting mechanism; 7. an upper tube seat screw; 8. a detachable sleeve; 9. a screw cap; 10. fixing the sleeve; 11. contacting the ball head; 12. a compression spring; 13. an adjusting screw; 14. a housing; 15. and (3) a nut.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1, a fuel assembly simulation device with adjustable clamping force of fuel rods comprises an upper tube seat 1, guide tubes 2, a grid 3, fuel rods 4, a lower tube seat 5 and a clamping force adjusting mechanism 6, wherein a plurality of guide tubes 2 are arranged between the lower tube seat 5 and the upper tube seat 1, a plurality of grids 3 are mutually parallel and fixed between the upper tube seat 1 and the lower tube seat 5, holes which are arranged according to a certain rule are arranged on the grid 3, a plurality of fuel rods 4 are supported and fixed on the grid 3 and are mutually parallel to the guide tubes 2, and the overall dimension and the main structure connection mode of the fuel assembly simulation device formed by the upper tube seat 1, the grid 3, the fuel rods and the lower tube seat 5 are consistent with those of a real fuel assembly; as shown in fig. 2, the guide tube 2 comprises a detachable sleeve 8, a nut 9 and a fixed sleeve 10, wherein the upper end of the detachable sleeve 8 is fixedly connected with the upper tube seat 1 through an upper tube seat screw 7, the lower end of the detachable sleeve 8 is provided with a boss, the nut 9 can be sleeved on the boss at the lower end of the detachable sleeve 8 and is connected with a threaded section at the end part of the fixed sleeve 10, the lower end of the detachable sleeve 8 can be fixedly connected with the upper end of the fixed sleeve 10 by utilizing the nut 9, and the fixed sleeve 10 and the grid 3 are welded and fixed into an integral structure; as shown in fig. 3 to 5, the clamping force adjusting mechanism 6 comprises a contact ball 11, a compression spring 12, an adjusting screw 13 and a shell 14, wherein the upper part of the shell 14 is provided with a cavity structure, a hole is formed at the front end of the cavity, the contact ball 11 with a cylindrical rod-shaped structure is arranged in the cavity of the shell 14, the front end of the contact ball 11 passes through the hole of the cavity on the shell 14, the contact ball 11 is pressed against the cavity hole of the shell 14 by the compression spring 12 and the adjusting screw 13, and the pressing force of the compression spring 12 on the contact ball 11 can be adjusted by rotating the position of the adjusting screw 13 in the cavity of the shell 14; the end of the shell 14 close to the contact ball 11 is provided with a convex structure, and the axis of the convex structure is perpendicular to the axis of the contact ball 11; a locating pin and a screw rod are arranged at the lower part of the shell 14, and the distance between the locating pin and the screw rod is matched with the pitch interval of the holes on the grid 3; the shell 14 can be positioned on the hole site of the grid 3 through a positioning pin, and the shell 14 is integrally fixed on the grid 3 through a nut 15 and a screw; the two clamping force adjusting mechanisms 6 are respectively arranged on two adjacent sides of the grid 3, so that the contact ball head 11 and the protruding structure in the two clamping force adjusting mechanisms 6 can clamp four axial directions of the fuel rod 4, and the pressing force of the contact ball head 11 on the fuel rod 4 can be adjusted through the adjusting screw 13.
The clamping force of the fuel rod in the fuel assembly simulation device with the adjustable clamping force of the fuel rod is adjusted as follows: the clamping force adjusting mechanism 6 is arranged on the grid 3 and is locked by the nuts 15, at the moment, the contact ball head 11 is in contact with the fuel rod 4, a certain compression force is generated on the fuel rod 4 under the action of the compression spring 12, the adjusting screw 13 is screwed inwards to increase the compression force of the contact ball head 11 on the fuel rod 4, and in the same way, the adjusting screw 13 is unscrewed outwards to reduce the compression force of the contact ball head 11 on the fuel rod 4; the upper tube seat is removed and the removable sleeve is replaced as follows: the upper tube seat 1 can be removed after the upper tube seat screw 7 is removed in sequence, and then the removable sleeve 8 can be replaced after the nut 9 is removed from the fixed sleeve 10.
Claims (3)
1. The utility model provides a fuel assembly analogue means of fuel rod clamping force adjustable which characterized in that: the device comprises an upper tube seat (1), guide tubes (2), a grid (3), fuel rods (4), a lower tube seat (5) and a clamping force adjusting mechanism (6), wherein a plurality of guide tubes (2) are arranged between the lower tube seat (5) and the upper tube seat (1); a plurality of grids (3) are arranged between the upper tube seat (1) and the lower tube seat (5) in parallel; holes which are distributed in the same way as the real grillwork are arranged on the grillwork (3); a plurality of fuel rods (4) are supported on the fixed grid (3) and are parallel to the guide pipes (2); the overall external dimension of the fuel assembly simulation device formed by the upper tube seat (1), the grid (3), the fuel rods (4) and the lower tube seat (5) is consistent with that of a real fuel assembly; The clamping force adjusting mechanism (6) comprises a fixed protrusion and a movable protrusion which are perpendicular to each other, the movable protrusion is supported by a spring, and the compression amount applied to the movable protrusion can be adjusted; the clamping force adjusting mechanisms (6) can be positioned and installed on the grillwork (3), and the fixed bulges and the movable bulges in the two clamping force adjusting mechanisms (6) can clamp the fixed fuel rods (4) and can change the clamping force on the fuel rods (4) by adjusting the force applied to the movable bulges; the clamping force adjusting mechanism (6) comprises a contact ball head (11), a compression spring (12), an adjusting screw (13) and a shell (14), wherein a cavity structure is arranged at the upper part of the shell (14), a hole is formed in the front end of the cavity structure, and the contact ball head (11) penetrates through the hole of the cavity structure to form a movable protrusion; The compression spring (12) is arranged in the cavity structure, the compression spring (12) is limited between the contact ball head (11) and the adjusting screw (13) through the adjusting screw (13), and the position of the adjusting screw (13) in the cavity structure can be adjusted so as to change the pressure of the compression spring (12) to the contact ball head (11); the end part of the shell (14) close to the contact ball head (11) is provided with a bulge structure, the axial direction of the bulge structure is perpendicular to the axis of the contact ball head (11), and a fixing bulge is formed; the clamping force adjusting mechanism (6) further comprises a locating pin and a screw rod, wherein the locating pin and the screw rod are arranged at the lower part of the shell (14), and the distance and the size between the locating pin and the screw rod are matched with the hole pitch interval on the grid (3); The shell (14) can be positioned on a hole site of the grid (3) through a positioning pin, and the shell (14) is fastened on the grid (3) through a nut (15) and a screw rod; the guide tube (2) comprises a detachable sleeve (8), a screw cap (9) and a fixed sleeve (10), wherein a boss is arranged at the lower end of the detachable sleeve (8), the screw cap (9) is sleeved on the boss and is connected with a threaded section of the upper end part of the fixed sleeve (10) in a matched manner, and the lower end of the detachable sleeve (8) is fixedly connected with the upper end of the fixed sleeve (10) by the screw cap (9); the upper end of the detachable sleeve (8) is fixed with a part of the upper tube seat (1) through an upper tube seat screw (7); the lower end of the fixed sleeve (10) is fixedly connected with the grid (3).
2. The fuel assembly simulator of claim 1 wherein the clamping force of the fuel rod is adjustable, wherein: the two clamping force adjusting mechanisms (6) are fixed on adjacent edges of the grid (3), wherein the movable protrusions in the first clamping force adjusting mechanism are opposite to the fixed protrusions in the second clamping force adjusting mechanism and are on the same axis.
3. The fuel assembly simulator of claim 1 wherein the clamping force of the fuel rod is adjustable, wherein: the lower end of the fixed sleeve (10) and the grid (3) are welded and fixed to form an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396486.4A CN110993130B (en) | 2019-12-30 | 2019-12-30 | Fuel assembly simulation device with adjustable clamping force of fuel rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396486.4A CN110993130B (en) | 2019-12-30 | 2019-12-30 | Fuel assembly simulation device with adjustable clamping force of fuel rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110993130A CN110993130A (en) | 2020-04-10 |
| CN110993130B true CN110993130B (en) | 2024-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911396486.4A Active CN110993130B (en) | 2019-12-30 | 2019-12-30 | Fuel assembly simulation device with adjustable clamping force of fuel rod |
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| Country | Link |
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| CN (1) | CN110993130B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111489840B (en) * | 2020-05-25 | 2025-01-03 | 中国原子能科学研究院 | A detachable annular fuel test assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211742663U (en) * | 2019-12-30 | 2020-10-23 | 中核武汉核电运行技术股份有限公司 | Fuel assembly simulation device with adjustable clamping force of fuel rod |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652425A (en) * | 1985-08-08 | 1987-03-24 | Westinghouse Electric Corp. | Bottom grid mounted debris trap for a fuel assembly |
| FR2641893B1 (en) * | 1988-12-28 | 1992-10-16 | Framatome Sa | DEVICE AND METHOD FOR CONTROLLING THE FORCE OF AXIAL HOLDING OF A PERIPHERAL PENCIL OF A FUEL ASSEMBLY OF A NUCLEAR REACTOR |
| FR2677797B1 (en) * | 1991-06-13 | 1993-10-08 | Framatome | REMOVABLE NUCLEAR FUEL ASSEMBLY, FOR A HOUSING. |
| CN102339651B (en) * | 2011-10-13 | 2013-06-26 | 秦山核电有限公司 | Positioning device for accurately positioning fuel rod replacing tool on extracted fuel rod |
| KR101493686B1 (en) * | 2013-08-20 | 2015-02-16 | 한국원자력연구원 | Nuclear Fuel Rod Assembly And Device Of Installation/Separation Thereof |
| CN205900101U (en) * | 2016-08-18 | 2017-01-18 | 四川华都核设备制造有限公司 | Novel anchor clamps are used to fuel assembly pull -rod for nuclear power station |
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2019
- 2019-12-30 CN CN201911396486.4A patent/CN110993130B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211742663U (en) * | 2019-12-30 | 2020-10-23 | 中核武汉核电运行技术股份有限公司 | Fuel assembly simulation device with adjustable clamping force of fuel rod |
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| CN110993130A (en) | 2020-04-10 |
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