Anti-hooking experimental device for fuel assembly

Abstract

The invention discloses an anti-hooking experimental device for a fuel assembly. The anti-hooking experimental device comprises a positioning mechanism, a simulation mechanism, a plurality of transverse loading mechanisms, a lifting mechanism and a leveling and centering mechanism. According to the anti-hooking experimental device for the fuel assembly, a transverse load is applied to the fixed simulation body through the transverse loading mechanism, so that contact friction occurs between the fixed simulation body and the movable simulation body, and the contact characteristics of a movable part and a fixed part in the loading and unloading process of the fuel assembly are simulated; the movable simulation body is driven by the lifting mechanism to be lifted or inserted downwards at the characteristic speed, so that the hooking process of the fuel assembly is simulated, economical efficiency is guaranteed, meanwhile, the hoisting and hooking process of the fuel assembly can be accurately simulated, experimental data in the experimental process are obtained, a basis is provided for verifying the anti-hooking performance of the fuel assembly structure, and the experimental efficiency is improved. The anti-hooking performance of the fuel assembly can be effectively verified. Meanwhile, according to the anti-hooking experimental device for the fuel assembly, the overall leveling and centering of the experimental device are ensured through the leveling and centering mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of fuel assembly mechanics, and in particular to a fuel assembly anti-hooking experimental device. Background Art

[0002] During the loading and unloading process of fuel assemblies, the protruding structure of the fuel rod ribs may cause the fuel assemblies to hook each other, resulting in damage to the fuel assemblies. Therefore, it is necessary to test and verify the anti-hooking performance of the fuel assemblies. At present, the conventional method for testing the anti-hooking performance of fuel assemblies is to use a fuel assembly that has been modeled with a size ratio and subjected to single-sided pressure to simulate the contact characteristics. This method cannot well reflect the actual anti-hooking performance of the fuel assembly because the size and contact mode of the fuel assembly are greatly different from the original reactor type. There is currently a lack of a device that can be used for anti-hooking experiments on fuel assemblies. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a fuel assembly anti-hooking experimental device.

[0004] The technical solution adopted by the present invention to solve the technical problem is: constructing a fuel assembly anti-hooking experimental device, which includes a positioning mechanism, a simulation mechanism, a plurality of lateral loading mechanisms, a lifting mechanism and a leveling and centering mechanism;

[0005] The simulation mechanism comprises a simulation frame assembly connected to the positioning mechanism, a fixed simulation body fixedly connected to the simulation frame assembly, and a movable simulation body movable relative to the fixed simulation body, wherein the fixed simulation body is provided with a moving space for the movable simulation body to move;

[0006] A plurality of the transverse loading mechanisms are mounted on the simulation frame assembly and are used to apply a transverse load to the fixed simulation body;

[0007] The lifting mechanism is connected to the positioning mechanism and is used to drive the movable simulation body to perform axial lifting and lowering movement;

[0008] The leveling and centering mechanism is used to realize the overall leveling and centering function of the experimental device.

[0009] In some embodiments, the simulation frame assembly includes a simulation positioning frame, a plurality of positioning rings, and a plurality of linear guide rails;

[0010] The simulation positioning frame is fixedly connected to the positioning mechanism;

[0011] The plurality of positioning rings are fixedly connected to the simulation positioning frame, and the plurality of positioning rings are separately arranged along the axial direction of the simulation positioning frame;

[0012] The plurality of linear guide rails are fixedly connected to the simulation positioning frame, and the plurality of linear guide rails are arranged separately along the circumferential direction of the simulation positioning frame, and the transverse loading mechanism is installed on the linear guide rails.

[0013] In some embodiments, the simulation frame assembly further includes an upper end plate and a lower end plate;

[0014] The upper end plate and the lower end plate are separately arranged at the top and the bottom of the simulation positioning frame, and two ends of the fixed simulation body are respectively fixedly connected to the upper end plate and the lower end plate.

[0015] In some embodiments, each of the transverse loading mechanisms includes a loading action plate, a loading force transmission plate, a loading pressure plate, a loading mounting plate, a loading transmission member, a loading adjustment member, and an elastic member;

[0016] The loading action plate is used to contact the fixed simulation body, the loading force transmission plate is fixedly connected to the loading action plate, the loading pressure plate is fixedly connected to the loading force transmission plate, the loading pressure plate is movable relative to the loading mounting plate, and the loading transmission member is drivingly connected to the loading mounting plate;

[0017] The loading mounting plate is mounted on the linear guide rail, the loading adjustment member is fixedly connected to one end of the loading transmission member, and one end of the loading transmission member away from the loading adjustment member is connected to the elastic member.

[0018] In some embodiments, each of the transverse loading mechanisms further includes a loading guide rod, a loading displacement sensor, and a loading force sensor;

[0019] The two ends of the loading guide rod are respectively connected to the loading action plate and the loading mounting plate, and the loading guide rod is penetrated through the loading force transmission plate and the loading pressure plate.

[0020] In some embodiments, the positioning mechanism includes a support base, a support vertical beam, and a support horizontal beam;

[0021] The simulated positioning frame is fixedly connected to the supporting base frame, the lower end of the supporting vertical beam is fixedly connected to the supporting base frame, and the supporting cross beam is fixedly connected to the upper end of the supporting vertical beam.

[0022] In some embodiments, the lifting mechanism includes a lifting rail, a lifting slider, a lifting mounting block, a lifting screw rod, and a lifting drive;

[0023] The lifting slide rail is fixedly connected to the supporting vertical beam, and the lifting slider is movably connected to the lifting slide rail;

[0024] The lifting installation block is fixedly connected to the lifting sliding block, and the lifting installation block is drivingly connected to the lifting screw rod;

[0025] The lifting drive is mounted on the supporting vertical beam and the output end of the lifting drive is connected to the lifting screw rod.

[0026] In some embodiments, the lifting mechanism further comprises a lifting beam and a beam grabber;

[0027] The lifting crossbeam is fixedly connected to the lifting installation block, the crossbeam gripping head is fixedly connected to the lifting crossbeam, and the crossbeam gripping head is used to connect with the operating head on the movable simulation body.

[0028] In some embodiments, a lifting displacement sensor and a lifting force sensor are provided on the beam gripping head.

[0029] In some embodiments, the leveling and centering mechanism includes a leveling member, a level ruler, an infrared level meter, and a laser plumb line meter;

[0030] The leveling member is installed between the supporting chassis and the ground structure;

[0031] The level ruler is used in conjunction with the infrared level meter;

[0032] The laser plumb line is mounted on the lifting beam and is used to check the centering of the experimental device.

[0033] The implementation of the present invention has the following beneficial effects: the fuel assembly anti-hooking experimental device simulates the fixed part of the fuel assembly by setting a fixed simulation body, and sets a movable simulation body to simulate the movable part of the fuel assembly during loading and unloading, so as to simulate the process of the fuel assembly being hooked during loading and unloading. The lateral load is applied to the fixed simulation body by the lateral loading mechanism so that the fixed simulation body and the movable simulation body are in contact and friction, so as to simulate the contact characteristics of the movable part and the fixed part of the fuel assembly during loading and unloading. The movable simulation body can be lifted or inserted at a characteristic speed by the lifting mechanism, so as to simulate the hooking process of the fuel assembly. This not only ensures the economy, but also can accurately simulate the fuel assembly hoisting and hooking process, so as to obtain the experimental data in the experimental process, provide a basis for verifying the anti-hooking performance of the fuel assembly structure, and can effectively verify the anti-hooking performance of the fuel assembly. At the same time, the fuel assembly anti-hooking experimental device also ensures the overall leveling and centering of the experimental device through the leveling and centering mechanism to ensure the stability of the overall operation of the experimental device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 It is a schematic diagram of the overall structure of a fuel assembly anti-hooking experimental device in some embodiments of the present invention;

[0036] Figure 2 yes Figure 1 An enlarged schematic diagram of point A;

[0037] Figure 3 yes Figure 1 An enlarged schematic diagram of point B;

[0038] Figure 4 is a structural front view of a simulation mechanism in some embodiments of the present invention;

[0039] Figure 5 yes Figure 4 A top view of the structure;

[0040] Figure 6 is a schematic diagram of a three-dimensional structure of a simulation mechanism in some embodiments of the present invention;

[0041] Figure 7 is a schematic diagram of the three-dimensional structure of the transverse loading mechanism in some embodiments of the present invention;

[0042] Figure 8 is a schematic diagram of the application of a laser plummet in some embodiments of the present invention;

[0043] Fig. 9 It is a schematic diagram of the application of the leveling and centering mechanism in some embodiments of the present invention. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0045] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0046] See also Figures 1 to 9 , is a fuel assembly anti-hooking experimental device in some embodiments of the present invention, which includes a positioning mechanism 1, a simulation mechanism 2, a plurality of transverse loading mechanisms 3, a lifting mechanism 4, and a leveling and centering mechanism 5. The simulation mechanism 2 includes a simulation frame assembly 21 connected to the positioning mechanism 1, a fixed simulation body 22 fixedly connected to the simulation frame assembly 21, and a movable simulation body 23 that can move relative to the fixed simulation body 22; a moving space for the movable simulation body 23 to move is provided in the fixed simulation body 22; a plurality of transverse loading mechanisms 3 are installed on the simulation frame assembly 21, and are used to apply a transverse load to the fixed simulation body 22; the lifting mechanism 4 is connected to the positioning mechanism 1, and is used to drive the movable simulation body 23 to perform axial lifting and lowering movements; the leveling and centering mechanism 5 is used to realize the overall leveling and centering function of the experimental device.

[0047] It can be understood that, due to the structure of the protruding ribs of the fuel rods during the loading and unloading process of the fuel assembly, the fuel assemblies may be hooked with each other, resulting in damage to the fuel assembly. The fuel assembly anti-hooking experimental device simulates the process of the fuel assembly hooking during the loading and unloading process by setting a fixed simulation body 22 to simulate the fixed part of the fuel assembly, and setting a movable simulation body 23 to simulate the movable part of the fuel assembly during the loading and unloading process. The fixed simulation body 22 is specifically a fuel assembly rod bundle. The lateral load is applied to the fixed simulation body 22 by the lateral loading mechanism 3 so that the fixed simulation body 22 and the movable simulation body 23 are in contact and friction, so as to simulate the contact characteristics of the movable part and the fixed part of the fuel assembly during the loading and unloading process. The movable simulation body 23 can be lifted or inserted at a characteristic speed by the lifting mechanism 4, so as to simulate the hooking process of the fuel assembly. This not only ensures the economy, but also can accurately simulate the hanging process of the fuel assembly, so as to obtain the experimental data in the experimental process, provide a basis for verifying the anti-hooking performance of the fuel assembly structure, and effectively verify the anti-hooking performance of the fuel assembly. At the same time, the fuel assembly anti-hooking experimental device also ensures the overall leveling and centering of the experimental device through the leveling and centering mechanism 5 to ensure the stability of the overall operation of the experimental device.

[0048] like Figure 6 As shown, the simulation frame assembly 21 includes a simulation positioning frame 211, a plurality of positioning rings 212, and a plurality of linear guides 213. The simulation positioning frame 211 is fixedly connected to the positioning mechanism 1, a plurality of positioning rings 212 are fixedly connected to the simulation positioning frame 211, and the plurality of positioning rings 212 are separated and arranged along the axial direction of the simulation positioning frame 211, a plurality of linear guides 213 are fixedly connected to the simulation positioning frame 211, and the plurality of linear guides 213 are separated and arranged along the circumferential direction of the simulation positioning frame 211, and the transverse loading mechanism 3 is installed on the linear guides 213. It can be understood that the simulation positioning frame 211 is a reaction force frame, which can be composed of a plurality of columns. In this embodiment, the simulation positioning frame 211 is specifically a hexagonal reaction force frame, and the cross-sectional shape of the simulation positioning frame 211 is a hexagon, which can complete the experiment of the anti-hooking performance of the fuel assembly with a regular hexagonal cross section and the adjacent fuel assembly during the loading and unloading process. The positioning ring 212 can determine the spacing between the opposite sides and adjacent sides of the columns of the simulated positioning frame 211. The lateral loading mechanism 3 is installed on the linear guide rail 213, and the lateral loading mechanism 3 can be adjusted up and down on the linear guide rail 213 according to the experimental requirements. In this embodiment, the number of the lateral loading mechanisms 3 is six to match the hexagonal simulated positioning frame 211, and the six lateral loading mechanisms 3 are evenly arranged along the circumferential direction of the simulated positioning frame 211. In some other embodiments, the number of the lateral loading mechanisms 3 can be matched and adjusted according to the shape of the simulated positioning frame 211, which is not specifically limited here.

[0049] The simulation frame assembly 21 further includes an upper end plate 214 and a lower end plate 215, which are respectively disposed at the top and the bottom of the simulation positioning frame 211, and the two ends of the fixed simulation body 22 are respectively fixedly connected to the upper end plate 214 and the lower end plate 215. It can be understood that the upper end plate 214 is located at the top of the simulation positioning frame 211, and the lower end plate 215 is located at the top of the simulation positioning frame 211, and the upper end plate 214 and the lower end plate 215 are used to determine the installation position of the fixed simulation body 22 and provide a fixed support structure.

[0050] like Figure 7 As shown, each lateral loading mechanism 3 includes a loading action plate 31, a loading force transmission plate 32, a loading pressure plate 33, a loading mounting plate 34, a loading transmission member 35, a loading adjustment member 36 and an elastic member. The loading action plate 31 is used to contact the fixed simulation body 22, the loading force transmission plate 32 is fixedly connected to the loading action plate 31, the loading pressure plate 33 is fixedly connected to the loading force transmission plate 32, the loading pressure plate 33 is movable relative to the loading mounting plate 34, and the loading transmission member 35 is transmission-connected to the loading mounting plate 34. In addition, the loading mounting plate 34 is installed on the linear guide rail 213, the loading adjustment member 36 is fixedly connected to one end of the loading transmission member 35, and the end of the loading transmission member 35 away from the loading adjustment member 36 is connected to the elastic member.

[0051] It can be understood that the lateral loading mechanism 3 is a spring loading device as a whole, and the spring loading device is a device that uses the elastic characteristics of a spring to provide a stable and adjustable loading force. Specifically, the loading adjustment member 36 can be a handwheel adjustment member, the loading transmission member 35 can be an adjustment bolt member, and the elastic member can be a spring. The loading transmission member 35 can be threadedly connected to the loading mounting plate 34, and the tightness of the loading transmission member 35 to the elastic member can be adjusted by rotating the loading adjustment member 36 to change the compression degree of the elastic member, thereby controlling the size of the loading force. That is, the lateral loading mechanism 3 can apply a lateral load to the fixed simulation body 22 by rotating the loading adjustment member 36, realize the simulated contact and quantitative extrusion between the fixed simulation body 22 and the movable simulation body 23, and then complete the process of simulating the lateral stiffness between adjacent fuel assemblies in actual applications.

[0052] Each lateral loading mechanism 3 also includes a loading guide rod 37, a loading displacement sensor 38 and a loading force sensor. The two ends of the loading guide rod 37 are respectively connected to the loading action plate 31 and the loading mounting plate 34, and the loading guide rod 37 is inserted through the loading force transmission plate 32 and the loading pressure plate 33. The number of the loading guide rods 37 is preferably four, and the loading guide rods 37 can provide a guiding function for the movement of the loading action plate 31, the loading force transmission plate 32 and the loading pressure plate 33. The loading displacement sensor 38 can be installed on the loading mounting plate 34, and can measure the distance between the loading mounting plate 34 and the loading pressure plate 33, so as to measure the loading displacement of the lateral loading mechanism 3 as a whole on the movable simulation body 23. The loading force sensor is used to measure the load size of the lateral loading to facilitate quantitative extrusion.

[0053] like Figure 1 As shown, the positioning mechanism 1 includes a supporting base frame 11, a supporting vertical beam 12 and a supporting cross beam 13. The simulated positioning frame 211 is fixedly connected to the supporting base frame 11, the lower end of the supporting vertical beam 12 is fixedly connected to the supporting base frame 11, and the supporting cross beam 13 is fixedly connected to the upper end of the supporting vertical beam 12. The simulated positioning frame 211 can be fixed to the supporting base frame 11 by bolts, and the supporting vertical beam 12 is arranged perpendicular to the supporting base frame 11. There are two supporting vertical beams 12, and the two supporting vertical beams 12 are connected by the supporting cross beam 13 to ensure the overall rigidity and stability of the positioning mechanism 1.

[0054] like Figure 1 and Figure 2 As shown, the lifting mechanism 4 includes a lifting rail 41, a lifting slider 42, a lifting mounting block 43, a lifting screw 44 and a lifting driver 45. The lifting rail 41 is fixedly connected to the supporting vertical beam 12, the lifting slider 42 is movably connected to the lifting rail 41, the lifting mounting block 43 is fixedly connected to the lifting slider 42, and the lifting mounting block 43 is in transmission connection with the lifting screw 44, the lifting driver 45 is installed on the supporting vertical beam 12, and the output end of the lifting driver 45 is connected to the lifting screw 44. It can be understood that the lifting mounting block 43 is L-shaped, and the lifting driver 45 can drive the lifting mounting block 43 and the components installed on the lifting mounting block 43 to perform axial lifting and lowering motion together through the lifting screw 44, and the lifting driver 45 can be a servo motor.

[0055] like Figure 3As shown, the lifting mechanism 4 also includes a lifting beam 46 and a beam gripper 47. The lifting beam 46 is fixedly connected to the lifting mounting block 43, and the beam gripper 47 is fixedly connected to the lifting beam 46. The beam gripper 47 is used to connect with the operating head on the movable simulation body 23. It can be understood that the lifting driver 45 can drive the lifting beam 46 to achieve axial lifting and lowering movement at a specific speed, and the beam gripper 47 is used to connect with the operating head on the movable simulation body 23. The degree of freedom of the operating head can be constrained by the beam gripper 47. The beam gripper 47 has the ability to maintain the side clamping force and prevent the operating head from rotating. The beam gripper 47 can be a four-sided clamp, and the top of the beam gripper 47 is embedded in the slot of the operating head to prevent twisting.

[0056] The crossbeam gripping head 47 is also provided with a lifting displacement sensor and a lifting force sensor to measure the displacement and lifting load during the lifting process.

[0057] like Figure 8 and Fig. 9 As shown, the leveling and centering mechanism 5 includes a leveling member 51, a level ruler 52, an infrared level meter 53, and a laser plumb line 54. The leveling member 51 is installed between the support frame 11 and the ground structure 61; the level ruler 52 is used in conjunction with the infrared level meter 53; the laser plumb line 54 is installed on the lifting beam 46 and is used to check the centering of the experimental device.

[0058] It can be understood that in order to ensure the centering and leveling requirements of the entire experimental device, a leveling and centering mechanism 5 is provided for centering and leveling the entire experimental device. Fig. 9 As shown, the leveling member 51 can be a leveling washer. After the support frame 11 is inserted into the installation hole array of the ground structure 61 through the positioning pin, the leveling member 51 is installed between the support frame 11 and the ground structure 61 for leveling. After the leveling is completed, the locking nut is used for fixed installation. The number of the leveling members 51 is preferably six. In addition, a level ruler 52 is installed on the support frame 11, and the infrared level meter 53 and the level ruler 52 are used to check the coordination to ensure that the bottom of the support vertical beam 12 and the support frame 11 are installed on the same plane, and then the distance between the bottom and the top of the two support vertical beams 12 is equal by adjusting to ensure that the two support vertical beams 12 are in a parallel state.

[0059] Among them, Figure 8 As shown, a laser plumb line 54 is installed at the center position of the lifting beam 46, and a center hole is opened at the center position of the lifting beam 46. A lower core simulation body 62 is set at the center position of the supporting base frame 11. The laser plumb line 54 is used to emit a laser downward, and the laser passes through the center hole. If the emitted laser coincides with the center mark of the lower core simulation body 62, it proves that the whole experimental device has good centering.

[0060] In general, the simulation mechanism 2 is installed as a test piece at the center of the entire experimental device. The lateral loading mechanism 3 and the simulation mechanism 2 cooperate to simulate the contact characteristics of the six sides of the fixed simulation body 22 and the movable simulation body 23, and the movable simulation body 23 is axially lifted and lowered at a specific speed through the lifting mechanism 4. The experiment simultaneously measures the axial displacement, axial load and lateral displacement of each contact side surface to obtain the lateral load time history curve, thereby completing the anti-hooking performance test of the fuel assembly test piece.

[0061] The present invention simulates the contact characteristics of adjacent fuel assemblies during loading and unloading of full-size new fuel assemblies with regular hexagonal cross-sections, accurately simulates the geometric characteristics of the contact surface, the mutual extrusion of assemblies and the lateral stiffness of adjacent fuel assemblies, and provides an economical and reliable test platform for verifying the anti-hooking performance test of fuel assemblies. The simulation positioning frame 211 controls the frame deformation during the hooking process through structural design and boundary constraint setting, thereby improving the test accuracy. The fuel assembly anti-hooking experimental device has a simple structure, is practical and economical, and can be adjusted according to the contact conditions of each side of the fuel assembly to meet different test requirements.

[0062] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A fuel assembly anti-hooking experimental device, characterized in that: It comprises a positioning mechanism (1), a simulation mechanism (2), a plurality of lateral loading mechanisms (3), a lifting mechanism (4) and a leveling and centering mechanism (5); The simulation mechanism (2) comprises a simulation frame assembly (21) connected to the positioning mechanism (1), a fixed simulation body (22) fixedly connected to the simulation frame assembly (21), and a movable simulation body (23) movable relative to the fixed simulation body (22), wherein a moving space for the movable simulation body (23) to move is provided in the fixed simulation body (22); A plurality of the transverse loading mechanisms (3) are mounted on the simulation frame assembly (21) and are used to apply a transverse load to the fixed simulation body (22); The lifting mechanism (4) is connected to the positioning mechanism (1) and is used to drive the movable simulation body (23) to perform axial lifting movement; The leveling and centering mechanism (5) is used to realize the overall leveling and centering function of the experimental device.

2. The fuel assembly anti-hanging experimental device according to claim 1, characterized in that: The simulation frame assembly (21) comprises a simulation positioning frame (211), a plurality of positioning rings (212) and a plurality of linear guide rails (213); The simulated positioning frame (211) is fixedly connected to the positioning mechanism (1); The plurality of positioning rings (212) are fixedly connected to the simulation positioning frame (211), and the plurality of positioning rings (212) are arranged in a spaced-apart manner along the axial direction of the simulation positioning frame (211); The plurality of linear guide rails (213) are fixedly connected to the simulation positioning frame (211), and the plurality of linear guide rails (213) are spaced apart along the circumferential direction of the simulation positioning frame (211), and the transverse loading mechanism (3) is mounted on the linear guide rails (213).

3. The fuel assembly anti-hanging experimental device according to claim 2, characterized in that: The simulation frame assembly (21) further comprises an upper end plate (214) and a lower end plate (215); The upper end plate (214) and the lower end plate (215) are separately arranged at the top and bottom of the simulation positioning frame (211), and the two ends of the fixed simulation body (22) are respectively fixedly connected to the upper end plate (214) and the lower end plate (215).

4. The fuel assembly anti-hanging experimental device according to claim 3, characterized in that: Each of the transverse loading mechanisms (3) comprises a loading action plate (31), a loading force transmission plate (32), a loading pressure plate (33), a loading mounting plate (34), a loading transmission member (35), a loading adjustment member (36) and an elastic member; The loading action plate (31) is used to contact the fixed simulation body (22), the loading force transmission plate (32) is fixedly connected to the loading action plate (31), the loading pressure plate (33) is fixedly connected to the loading force transmission plate (32), the loading pressure plate (33) is movable relative to the loading installation plate (34), and the loading transmission member (35) is transmission-connected to the loading installation plate (34); The loading mounting plate (34) is mounted on the linear guide rail (213), the loading adjustment member (36) is fixedly connected to one end of the loading transmission member (35), and one end of the loading transmission member (35) away from the loading adjustment member (36) is connected to the elastic member.

5. The fuel assembly anti-hanging experimental device according to claim 4, characterized in that: Each of the transverse loading mechanisms (3) further comprises a loading guide rod (37), a loading displacement sensor (38) and a loading force sensor; The two ends of the loading guide rod (37) are respectively connected to the loading action plate (31) and the loading mounting plate (34), and the loading guide rod (37) is inserted through the loading force transmission plate (32) and the loading pressure plate (33).

6. The fuel assembly anti-hanging experimental device according to claim 2, characterized in that: The positioning mechanism (1) comprises a supporting base frame (11), a supporting vertical beam (12) and a supporting horizontal beam (13); The simulated positioning frame (211) is fixedly connected to the supporting base frame (11), the lower end of the supporting vertical beam (12) is fixedly connected to the supporting base frame (11), and the supporting cross beam (13) is fixedly connected to the upper end of the supporting vertical beam (12).

7. The fuel assembly anti-hanging experimental device according to claim 6, characterized in that: The lifting mechanism (4) comprises a lifting rail (41), a lifting slider (42), a lifting mounting block (43), a lifting screw rod (44) and a lifting driver (45); The lifting slide rail (41) is fixedly connected to the supporting vertical beam (12), and the lifting slider (42) is movably connected to the lifting slide rail (41); The lifting installation block (43) is fixedly connected to the lifting slider (42), and the lifting installation block (43) is transmission-connected to the lifting screw rod (44); The lifting drive (45) is mounted on the supporting vertical beam (12) and the output end of the lifting drive (45) is connected to the lifting screw rod (44).

8. The fuel assembly anti-hanging experimental device according to claim 7, characterized in that: The lifting mechanism (4) further comprises a lifting beam (46) and a beam grabber (47); The lifting beam (46) is fixedly connected to the lifting installation block (43), and the beam gripping head (47) is fixedly connected to the lifting beam (46). The beam gripping head (47) is used to connect with the operating head on the movable simulation body (23).

9. The fuel assembly anti-hanging experimental device according to claim 8, characterized in that: The crossbeam grab head (47) is provided with a lifting displacement sensor and a lifting force sensor.

10. The fuel assembly anti-hanging experimental device according to claim 8, characterized in that: The leveling and centering mechanism (5) comprises a leveling member (51), a level ruler (52), an infrared level gauge (53) and a laser plummet (54); The leveling member (51) is installed between the supporting frame (11) and the ground structure (61); The level ruler (52) is used in conjunction with the infrared level meter (53); The laser plumb line (54) is mounted on the lifting beam (46) and is used to check the centering of the experimental device.

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