Device for fuel assembly seismic test validation

Abstract

The utility model discloses a device for fuel assembly anti -seismic test verification, including processing table, moving plate, processing table both sides fixedly connected with first side plate, both sides first side plate between fixedly connected with first guide rod, first guide rod outside slide connection has rear side first ear, one side first side plate outside fixedly connected with first motor, first motor power end penetrates first side plate fixedly connected with first screw rod, first screw rod tail portion is rotatably connected with the other side first side plate, first screw rod outside screw connection has front side first ear, moving plate both sides are seted up with moving groove, first ear slide connection in moving groove inside, moving plate upper portion fixedly connected with connecting frame, connecting frame inside rotatably connected with rotating cylinder, rotating cylinder inside fixedly connected with first spring, first spring upper portion fixedly connected with the table of placing, test scene and actual deviation reduce, and test data reference value is remarkable promotion.

Description

Technical Field

[0001] This utility model relates to the technical field of nuclear fuel assembly testing equipment, specifically a device for verifying the seismic resistance of fuel assemblies. Background Technology

[0002] Before nuclear fuel assemblies leave the factory, they must undergo rigorous seismic testing to verify their structural integrity (such as the connection strength of fuel rods and grids) to prevent damage to the assemblies due to vibration during reactor operation or transportation. Existing devices for seismic testing of fuel assemblies have the following key technical deficiencies, making it difficult to meet the requirements of high-precision testing: The shaking direction is singular and the simulation of working conditions is incomplete: Traditional devices can only achieve horizontal shaking in a single direction, which cannot simulate the multi-directional vibration of real earthquakes. The test scenario deviates greatly from the actual working conditions, and the test data has low reference value. Utility Model Content

[0003] The purpose of this invention is to provide an apparatus for verifying the seismic resistance of fuel assemblies, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for verifying the seismic resistance of fuel assemblies, comprising a processing table and a movable plate. First side plates are fixedly connected to both sides of the processing table, and a first guide rod is fixedly connected between the two first side plates. A rear first lug is slidably connected to the outer side of the first guide rod. A first motor is fixedly connected to the outer side of one of the first side plates. A first threaded rod is fixedly connected to the power end of the first motor through the first side plate. The tail of the first threaded rod is rotatably connected to the other first side plate. A front first lug is threadedly connected to the outer side of the first threaded rod. Movable grooves are provided on both sides of the movable plate. The first lug is slidably connected inside the movable groove. A connecting frame is fixedly connected to the upper part of the movable plate. A rotating cylinder is rotatably connected inside the connecting frame. A first spring is fixedly connected inside the rotating cylinder. A placement table is fixedly connected to the upper part of the first spring.

[0005] Preferably, a third guide rod is fixedly connected inside the movable groove, the third guide rod is slidably connected inside the first ear, and a second spring is fixedly connected between the two ends of the first ear and the inner wall of the movable groove, the second spring being sleeved on the outside of the third guide rod.

[0006] Preferably, the placement table has two sets of sliding grooves inside, and a second lug is slidably connected inside the sliding groove. A fixing plate is fixedly connected to the upper part of the second lug on the same side. A second side plate is fixedly connected to both sides of the lower part of the placement table. A second guide rod is fixedly connected between the rear sides of the two second side plates. The second guide rod is slidably connected inside the two sets of second lugs on the rear side. A second threaded rod is threadedly connected inside the two second lugs on the front side. The second threaded rod is rotatably connected between the two second side plates on the front side.

[0007] Preferably, an external gear ring is fixedly connected to the lower outer side of the rotating cylinder, and a power gear is meshed with the outer side of the external gear ring. A second motor is fixedly connected to the upper part of the connecting frame, and the power end of the second motor penetrates the connecting frame and is fixedly connected to the power gear.

[0008] Preferably, an outer limiting cylinder is fixedly connected to the lower side of the placement table, and the outer limiting cylinder is sleeved on the outside of the first spring. An inner limiting rod is fixedly connected to the lower part of the placement table and the inner side of the rotating cylinder, and the inner limiting rod is sleeved on the outside of the first spring.

[0009] Preferably, a protective railing is fixedly connected to the outer side of the upper part of the processing table.

[0010] Preferably, a rubber pad is fixedly connected to one side of the fixing plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a first motor to drive horizontal reciprocating motion, a first spring to achieve vertical buffering, and a second motor to adjust the rotation direction. It can simulate horizontal vibrations at any angle and vertical vibrations in multiple directions, covering complex working conditions such as earthquakes and equipment operation. The deviation between the test scenario and the actual situation is reduced, and the reference value of the test data is significantly improved. 2. This utility model also avoids direct metal contact through the rubber pad of the fixing plate, reducing the scratch rate of the component shell; by adjusting the spacing of the fixing plate through the second threaded rod, it can adapt to fuel components of different diameters or lengths, without the need to replace the clamps, and shortens the time for single specification switching. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a three-dimensional structural cross-sectional view of the present invention; Figure 4 This is an enlarged view of the structure at point A of this utility model.

[0013] In the diagram: 1. Processing table; 2. First side plate; 3. First guide rod; 4. First motor; 5. First threaded rod; 6. First lug; 7. Moving plate; 8. Moving groove; 9. Connecting frame; 10. Rotating cylinder; 11. First spring; 12. Placement table; 13. Third guide rod; 14. Second spring; 15. Outer limiting cylinder; 16. Inner limiting rod; 17. Outer gear ring; 18. Second motor; 19. Power gear; 20. Sliding groove; 21. Second lug; 22. Second side plate; 23. Second threaded rod; 24. Second guide rod; 25. Fixing plate; 26. Rubber pad; 27. Guardrail. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This utility model provides a technical solution: a device for verifying the seismic resistance of fuel assemblies, including a processing table 1 and a movable plate 7. Two sets of first side plates 2 are fixedly connected to both sides of the processing table 1 by hexagonal screws. Two sets of first guide rods 3 are fixedly connected between the two first side plates 2 by welding. The outer side of the first guide rods 3 is slidably connected to a rear first lug 6 by clearance fit. A first motor 4 is fixedly connected to the outer side of one first side plate 2 by flange screws. The power end of the first motor 4 penetrates the first side plate 2 and is fixedly connected to a first threaded rod 5 by a key. The tail of the first threaded rod 5 is rotatably connected by a deep groove ball bearing. Inside the first side plate 2 on the other side, the outer side of the first threaded rod 5 is connected to the front first lug 6 by a thread. The moving plate 7 has moving grooves 8 on both sides. The first lug 6 is slidably connected to the moving groove 8 by clearance fit. The upper part of the moving plate 7 is fixedly connected to the connecting frame 9 by screws. The connecting frame 9 is rotatably connected to the rotating cylinder 10 by a thrust ball bearing. The rotating cylinder 10 is fixedly connected to the first spring 11 by spot welding. The upper part of the first spring 11 is fixedly connected to the placement table 12 by spot welding. When the horizontal shaking occurs, the first spring 11 extends and retracts, causing the placement table 12 to move up and down to buffer, simulating vertical vibration. A third guide rod 13 is fixedly connected to the inside of the moving groove 8 by welding. The third guide rod 13 is slidably connected to the inside of the first ear 6 by clearance fit, providing sliding guidance for the first ear 6. A second spring 14 is fixedly connected to the inner wall of the moving groove 8 at both ends of the first ear 6 by spot welding. The second spring 14 is sleeved on the outside of the third guide rod 13. When the first motor 4 drives the moving plate 7 to reciprocate, the extension and retraction of the second spring 14 increases the shaking frequency, which is suitable for high-frequency vibration testing. The upper part of the placement table 12 has two sets of parallel sliding grooves 20. Inside the sliding grooves 20, four sets of second lugs 21 are slidably connected by clearance fit. The upper part of the two sets of second lugs 21 on the same side is fixedly connected to the fixing plate 25 by screws. The two sets of fixing plates 25 are symmetrically distributed and used to clamp the fuel assembly. The lower part of the placement table 12 has two sets of second side plates 22 fixedly connected by welding on both sides. The rear sides of the two second side plates 22 are fixedly connected by welding on both sides. The second guide rod 24 is slidably connected to the interior of the two sets of second lugs 21 on the rear side by clearance fit. The interior of the two second lugs 21 on the front side is connected to the second threaded rod 23 by thread. The second threaded rod 23 is rotatably connected between the two second side plates 22 on both sides by deep groove ball bearing. Rotating the second threaded rod 23 can drive the second lug 21 to slide along the second guide rod 24, causing the fixing plate 25 to move closer to or away from the assembly, thereby achieving clamping. An external gear ring 17 is fixedly connected to the lower outer side of the rotating cylinder 10 by welding. A power gear 19 is meshed with the outer side of the external gear ring 17. A second motor 18 is fixedly connected to the upper part of the connecting frame 9 by flange bolts. The power end of the second motor 18 passes through the connecting frame 9 and is keyed to the power gear 19. When the second motor 18 is started, the power gear 19 drives the external gear ring 17 to rotate synchronously with the rotating cylinder 10, thereby adjusting the horizontal angle of the placement table 12 and realizing the horizontal sway test in different directions. An outer limiting cylinder 15 is fixedly connected to the lower side of the placement table 12 by screws. The outer limiting cylinder 15 is sleeved on the outside of the first spring 11. An inner limiting rod 16 is fixedly connected to the lower part of the placement table 12 and the inner side of the rotating cylinder 10 by welding. The inner limiting rod 16 is sleeved on the outside of the first spring 11 and cooperates with the outer limiting cylinder 15 to prevent the first spring 11 from bending to the side and ensure stable up-and-down swaying. A protective railing 27 is fixedly connected to the upper outer side of the processing table 1 by screws. The protective railing 27 is used to prevent components from accidentally falling off during the test or to prevent external personnel from accidentally touching the equipment, thereby improving operational safety. A rubber pad 26 is glued to one side of the fixing plate 25. The rubber pad 26 prevents the metal fixing plate 25 from directly contacting the component, preventing scratches on the zirconium alloy shell, while increasing friction to ensure stable clamping.

[0016] Working principle: When using this utility model: place the fuel assembly to be tested stably on the upper center position of the placement table 12, ensuring that the axis of the assembly is aligned with the center line of the placement table 12; turn the end knob of the second threaded rod 23 with a wrench: the second threaded rod 23 rotates in the second side plate 22 through the deep groove ball bearing, driving the two sets of second lugs 21 on the front side to slide along the second guide rod 24 towards the assembly; the front fixing plate 25 moves closer to the assembly at the same time, and the rear second lugs 21 slide along the second guide rod 24 with the push of the assembly until the rubber pads 26 of the two fixing plates 25 are completely in contact with the assembly shell; stop rotating the second threaded rod 23, and due to the self-locking characteristic of the trapezoidal thread, the position of the fixing plate 25 is fixed, and the assembly is securely clamped; According to the shaking direction set in the test plan, the second motor 18 is started. The power end of the second motor 18 drives the power gear 19 to rotate. The power gear 19 meshes and drives the external gear ring 17 to rotate. The external gear ring 17 drives the rotating cylinder 10 to rotate in the connecting frame 9 through the thrust ball bearing. The rotating cylinder 10 drives the placement table 12 to rotate synchronously with the component. The rotation angle is monitored in real time by the angle encoder of the second motor 18. When the set direction is reached, the second motor 18 is turned off, the position of the rotating cylinder 10 is locked, and the shaking direction adjustment is completed. When the power supply to the first motor 4 is turned on, the motor speed is set through the frequency converter. The first motor 4 drives the first threaded rod 5 to rotate through the deep groove ball bearing, which drives the first lug 6 on the rear side to slide synchronously along the first guide rod 3. The first lug 6 drives the moving plate 7 to move back and forth along the moving groove 8. The moving plate 7 drives the connecting frame 9, the rotating cylinder 10, the placement table 12 and the components to swing horizontally synchronously. At the same time, the first lug 6 compresses or stretches the second spring 14. The extension and contraction of the second spring 14 amplifies the horizontal swing frequency, simulating high-frequency vibration. During the horizontal swaying process, the first spring 11 extends and retracts with the inertia of movement, causing the placement table 12 and the components to move up and down synchronously to buffer the swaying. The outer limit cylinder 15 and the inner limit rod 16 prevent the first spring 11 from bending to the side, ensuring stable up and down swaying.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for verifying the seismic resistance of fuel assemblies, comprising a processing table (1) and a movable plate (7), characterized in that: The processing table (1) is fixedly connected to two sides of a first side plate (2), and a first guide rod (3) is fixedly connected between the two sides of the first side plate (2). The first guide rod (3) is slidably connected to the outer side of a rear first ear (6). A first motor (4) is fixedly connected to the outer side of one side of the first side plate (2). The power end of the first motor (4) penetrates the first side plate (2) and is fixedly connected to a first threaded rod (5). The tail of the first threaded rod (5) is rotatably connected to the other side of the first side plate (2). The outer side of the first threaded rod (5) is threadedly connected to the front first ear (6). The moving plate (7) is provided with moving grooves (8) on both sides. The first ear (6) is slidably connected to the inside of the moving groove (8). A connecting frame (9) is fixedly connected to the upper part of the moving plate (7). A rotating cylinder (10) is rotatably connected inside the connecting frame (9). A first spring (11) is fixedly connected inside the rotating cylinder (10). A placement table (12) is fixedly connected to the upper part of the first spring (11).

2. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 1, characterized in that: A third guide rod (13) is fixedly connected inside the moving groove (8). The third guide rod (13) is slidably connected inside the first ear (6). A second spring (14) is fixedly connected between the two ends of the first ear (6) and the inner wall of the moving groove (8). The second spring (14) is sleeved on the outside of the third guide rod (13).

3. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 1, characterized in that: The placement table (12) has two sets of sliding grooves (20) inside. The sliding grooves (20) are slidably connected to the second lugs (21). The upper part of the second lugs (21) on the same side is fixedly connected to the fixed plate (25). The lower two sides of the placement table (12) are fixedly connected to the second side plates (22). The rear sides of the two second side plates (22) are fixedly connected to the second guide rod (24). The second guide rod (24) is slidably connected to the two sets of second lugs (21) on the rear side. The two second lugs (21) on the front side are threadedly connected to the second threaded rod (23). The second threaded rod (23) is rotatably connected between the two second side plates (22).

4. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 1, characterized in that: An external gear ring (17) is fixedly connected to the lower outer side of the rotating cylinder (10), and a power gear (19) is meshed with the outer side of the external gear ring (17). A second motor (18) is fixedly connected to the upper part of the connecting frame (9), and the power end of the second motor (18) penetrates the connecting frame (9) and is fixedly connected to the power gear (19).

5. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 1, characterized in that: An outer limiting cylinder (15) is fixedly connected to the lower side of the placement table (12). The outer limiting cylinder (15) is sleeved on the outside of the first spring (11). An inner limiting rod (16) is fixedly connected to the lower part of the placement table (12) and the inner side of the rotating cylinder (10). The inner limiting rod (16) is sleeved on the outside of the first spring (11).

6. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 1, characterized in that: The upper outer side of the processing table (1) is fixedly connected to a protective railing (27).

7. The apparatus for verifying the seismic resistance of fuel assemblies according to claim 3, characterized in that: A rubber pad (26) is fixedly connected to one side of the fixed plate (25).

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