Driving line anti-seismic test simulation supporting structure for high-temperature liquid metal reactor

Abstract

The invention discloses a drive line anti-seismic test simulation supporting structure for a high-temperature liquid metal reactor. The drive line anti-seismic test simulation supporting structure comprises an upper flange assembly, a middle-upper flange assembly, a middle-lower flange assembly and a lower flange assembly, an upper inner cylinder assembly is installed between the upper flange assembly and the middle upper flange assembly and is cylindrical, an upper decoupling assembly is installed on the outer side of the upper half portion of the upper inner cylinder assembly, and an upper outer cylinder assembly is installed on the lower half portion of the upper inner cylinder assembly. The inner cylinder assembly can be used for installing a control rod drive wire test piece, accommodating a high-temperature liquid metal melting medium and assembling an electric heating element so as to have heating and heat preservation functions, and a gap between the inner cylinder and the outer cylinder can be filled with a heat preservation and insulation material and can serve as an anti-leakage protection layer. The outer cylinder has the effects of supporting the test body and adjusting the overall structural rigidity; the flange assembly has the effects of connecting the inner and outer cylinders and transmitting an earthquake excitation load, and can also be assembled with an electric heating element so as to ensure the temperature uniformity of the test body.

Description

Technical Field

[0001] This invention relates to the field of seismic resistance technology for nuclear-grade equipment, specifically to a drive-line seismic test simulation support structure for high-temperature liquid metal reactors. Background Technology

[0002] The reactor control rod drive line is the actuator of the reactor control and protection system and is one of the key pieces of equipment in the reactor. It drives the control rod assembly to move up and down in the reactor core to control the reactor reactivity and complete the reactor startup, power regulation, power maintenance, shutdown and safe shutdown in accident conditions. Its performance directly affects the safety of the reactor, and its seismic resistance is extremely important to ensure the safe operation of the reactor.

[0003] The control rod drive line is a slender composite structure composed of multiple components. Such structures are highly sensitive to earthquakes (primarily low-frequency excitations), and seismic evaluation using experimental methods is essential before engineering applications to ensure the integrity and operability of the components under seismic loads. Current seismic tests on drive lines are all conducted on pressurized water reactor drive lines. Since these tests are performed in ambient-temperature cold water, special temperature and medium conditions do not need to be considered. However, the boundary conditions for seismic tests of drive lines used in high-temperature liquid metal reactors are complex, requiring thermal insulation to accommodate the molten liquid metal medium and effectively transfer seismic excitation loads. Seismic testing and boundary condition simulation for drive lines used in high-temperature liquid metal reactors are currently lacking. To address this technical challenge, designing a simulation support structure for seismic testing of drive lines used in high-temperature liquid metal reactors is crucial for this research. Summary of the Invention

[0004] The purpose of this invention is to provide a simulated support structure for seismic testing of a drive line for high-temperature liquid metal stacks. The structure employs a double-cylinder design. The inner cylinder serves as the interface for the test specimen and simulates the boundary conditions of the molten high-temperature liquid metal medium, while possessing sufficient strength and good sealing performance. It also incorporates guide grooves to house electric heating elements, enabling it to perform heating. The outer cylinder provides support for the test body, decouples the various structural components, and facilitates the transmission of seismic excitation, ultimately enabling seismic testing of a drive line for high-temperature liquid metal stacks.

[0005] The technical solution of the present invention is as follows: a drive line for seismic test simulation support structure for high temperature liquid metal stack, including an upper flange assembly, a middle upper flange assembly, a middle lower flange assembly, and a lower flange assembly; an upper inner cylinder assembly is installed between the upper flange assembly and the middle upper flange assembly, the upper inner cylinder assembly is cylindrical, an upper decoupling assembly is installed on the outer side of its upper half, and an upper outer cylinder assembly is installed on its lower half;

[0006] A middle inner cylinder assembly is installed between the middle upper flange assembly and the middle lower flange assembly. A middle decoupling assembly is located outside the middle inner cylinder assembly. A middle insulation cotton assembly is located between the middle inner cylinder assembly and the middle decoupling assembly.

[0007] Between the middle and lower flange assembly and the lower flange assembly is a lower inner cylinder assembly. The lower decoupling assembly is installed on the outer side of the upper half of the lower inner cylinder assembly, and the lower outer cylinder assembly is installed on the lower half.

[0008] The bottom support cylinder assembly is installed at the lower end of the lower flange assembly;

[0009] The upper inner cylinder assembly, the middle inner cylinder assembly, and the lower inner cylinder assembly form the inner cylinder, and the electric heating element is located inside the inner cylinder.

[0010] An upper insulation cotton assembly is installed between the upper inner cylinder assembly and the upper decoupling assembly or the upper outer cylinder assembly; a lower insulation cotton assembly is installed between the lower inner cylinder assembly and the lower decoupling assembly or the lower outer cylinder assembly.

[0011] The cylinder has an upper inner flange at the top and a lower inner flange at the bottom.

[0012] The electric heating element is located inside the inner cylinder.

[0013] The upper outer cylinder assembly and the lower outer cylinder assembly have the same structure, including an outer cylinder, with an upper flange at the top and a lower flange at the bottom, and an outer cylinder connecting pipe on the side of the outer cylinder.

[0014] The upper flange assembly, the middle upper flange assembly, the middle lower flange assembly, and the lower flange assembly have the same structure, including a main flange, a hinge rod connection assembly, a support rod connection assembly, and a horizontal actuator connection assembly. The main flange is connected to the upper and lower components, while the horizontal actuator connection assembly is connected to the horizontal actuator.

[0015] The bottom support cylinder assembly includes a bottom support cylinder, a bottom support cylinder flange at the top, a bottom support plate at the bottom, and a medium filling and draining pipe on the side of the bottom support cylinder. High-temperature liquid metal enters through the medium filling and draining pipe and flows into the inner cylinder.

[0016] The outer cylinder and the bottom support cylinder have outer cylinder connecting pipes on their sides.

[0017] During the seismic test, high-temperature liquid metal enters through the medium filling and draining pipe and flows into the inner cylinder. The electric heating element heats the high-temperature liquid metal, and the earthquake is simulated by applying lateral forces to the positions of the upper flange assembly, the middle upper flange assembly, the middle lower flange assembly, and the lower flange assembly.

[0018] The significant advantages of this invention are as follows: the inner cylinder assembly can be used to install the control rod drive line test specimen, contain the high-temperature liquid metal molten medium, and assemble electric heating elements to provide heating and heat preservation functions; the gap between the inner and outer cylinders can be filled with heat-insulating material and can also serve as a leak-proof protective layer; the outer cylinder has the function of supporting the test body and adjusting the overall structural rigidity; the flange assembly has the function of connecting the inner and outer cylinders and transmitting seismic excitation loads, and can also assemble electric heating elements to ensure the temperature uniformity of the test body. Attached Figure Description

[0019] Figure 1 Schematic diagram of the support structure for seismic testing of a drive line for a high-temperature liquid metal stack;

[0020] Figure 2 This is a schematic diagram of the inner cylinder assembly;

[0021] Figure 3 This is a schematic diagram of the outer cylinder assembly;

[0022] Figure 4-1 This is a schematic diagram of the bottom support cylinder assembly;

[0023] Figure 4-2 It is a top view;

[0024] Figure 5-1 This is a schematic diagram of a flange assembly;

[0025] Figure 5-2 It is a top view;

[0026] The markings in the diagram and their corresponding component names are as follows:

[0027] 1-Upper flange assembly, 2-Upper inner cylinder assembly, 3-Upper outer cylinder assembly, 4-Middle upper flange assembly, 5-Middle inner cylinder assembly, 6-Middle lower flange assembly, 7-Lower inner cylinder assembly, 8-Lower outer cylinder assembly, 9-Lower flange assembly, 10-Bottom support cylinder assembly, 11-Upper decoupling assembly, 12-Upper insulation cotton assembly, 13-Middle decoupling assembly, 14-Middle insulation cotton assembly, 15-Lower decoupling assembly, 16-Lower insulation cotton assembly, 17- Electric heating elements (several), 18-inner cylinder upper flange, 19-inner cylinder lower flange, 20-inner cylinder, 21-outer cylinder upper flange, 22-outer cylinder lower flange, 23-outer cylinder, 24-outer cylinder connecting pipe, 25-bottom support cylinder flange, 26-bottom support cylinder, 27-medium filling and discharging pipe, 28-bottom support plate, 29-main body flange, 30-hinge rod connection assembly, 31-support rod connection assembly, 32-horizontal actuator connection assembly. Detailed Implementation

[0028] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0029] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0030] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0031] The function of the simulated support structure for seismic testing of the control rod drive line in a high-temperature liquid metal reactor described in this article is to simulate the temperature and medium boundary of the slender control rod drive line in the high-temperature liquid metal reactor, as well as the seismic excitation transmission position and overall dynamic characteristics of each excitation point. This allows the seismic test to more accurately simulate the seismic response of the control rod drive line in the actual reactor.

[0032] like Figure 1 As shown, a high-temperature liquid metal stack drive line seismic test simulation support structure includes an upper flange assembly 1, a middle upper flange assembly 4, a middle lower flange assembly 6, and a lower flange assembly 9; an upper inner cylinder assembly 2 is installed between the upper flange assembly 1 and the middle upper flange assembly 4. The upper inner cylinder assembly 2 is cylindrical, with an upper decoupling assembly 11 installed on the outer side of its upper half and an upper outer cylinder assembly 3 installed on its lower half. An upper insulation cotton assembly 12 is located between the upper inner cylinder assembly 2 and the upper decoupling assembly 11 or the upper outer cylinder assembly 3.

[0033] A middle inner cylinder assembly 5 is installed between the middle upper flange assembly 4 and the middle lower flange assembly 6. A middle decoupling assembly 13 is located outside the middle inner cylinder assembly 5. A middle insulation cotton assembly 14 is located between the middle inner cylinder assembly 5 and the middle decoupling assembly 13.

[0034] Between the lower flange assembly 6 and the lower flange assembly 9, there is a lower inner cylinder assembly 7. The lower decoupling assembly 15 is installed on the outer side of the upper half of the lower inner cylinder assembly 7, and the lower outer cylinder assembly 8 is installed on the lower half. A lower insulation cotton assembly 16 is installed between the lower inner cylinder assembly 7 and the lower decoupling assembly 15 or the lower outer cylinder assembly 8.

[0035] The bottom support cylinder assembly 10 is installed at the lower end of the lower flange assembly 9, and the connection and installation with the vertical actuator can be achieved below the bottom support cylinder assembly 10.

[0036] like Figure 2 As shown, the upper inner cylinder assembly 2, the middle inner cylinder assembly 5, and the lower inner cylinder assembly 7 form the inner cylinder 20. An electric heating element 17 is located inside the inner cylinder 20. The inner cylinder 20 has an upper flange 18 at the top and a lower flange 19 at the bottom. The electric heating element 17 has a heating function. The control rod drive line is located inside the inner cylinder 20.

[0037] The inner cylinder 20 serves to provide vertical support and contain high-temperature liquid metal. The upper flange 18 and lower flange 19 are connected to adjacent structural components. The electric heating elements 17 are evenly distributed in sections around the inner cylinder 20 for heating and heat preservation of the high-temperature liquid metal.

[0038] like Figure 3 As shown, the upper outer cylinder assembly 3 or the lower outer cylinder assembly 8 have common features, including an outer cylinder 23, with an upper flange 21 at the top and a lower flange 22 at the bottom, and an outer cylinder pipe 24 on the side of the outer cylinder 23.

[0039] The outer cylinder 23 serves as a vertical support and accommodates the insulation material, while the upper flange 21 and lower flange 22 of the outer cylinder are used to connect with adjacent structural components. The outer cylinder nozzle 24 is the interface for the internal test wires to be led out, and the cable of the electric heating element 17 passes through the outer cylinder nozzle 24.

[0040] like Figure 4-1 , 4-2 As shown, the bottom support cylinder assembly 10 serves as the mounting base for the upper structural components and also as the base for applying the vertical vibration load at the bottom. The bottom support cylinder assembly 10 includes a bottom support cylinder 26, with a bottom support cylinder flange 25 at the top and a bottom support plate 28 at the bottom. The bottom support cylinder 26 has connecting pipes and medium filling / draining pipes 27 on its side. High-temperature liquid metal enters through the medium filling / draining pipes 27 and flows into the inner cylinder 20.

[0041] like Figure 5-1 , 5-2As shown, the upper flange assembly 1, the middle upper flange assembly 4, the middle lower flange assembly 6, and the lower flange assembly 9 share common features, including a main flange 29, a hinge rod connection assembly 30, a support rod connection assembly 31, and a horizontal actuator connection assembly 32. The main flange 29 is connected to the upper and lower components, while the horizontal actuator connection assembly 32 is connected to the horizontal actuator. The actual installation method of each test piece inside is simulated through each mounting flange, and the horizontal excitation load is transmitted at each location.

[0042] The upper decoupling component 11, the middle decoupling component 13, and the lower decoupling component 15 are used to solve the problem of relatively large differences in horizontal seismic excitation between the support excitation points of various components of the control rod drive line in the seismic test.

[0043] During the seismic test, high-temperature liquid metal enters through the medium filling and draining pipe 27 and flows into the inner cylinder 20. The electric heating element 17 heats the high-temperature liquid metal, and the control rod drive line is located inside the inner cylinder 20. By applying lateral forces to the positions of the upper flange assembly 1, the middle upper flange assembly 4, the middle lower flange assembly 6, and the lower flange assembly 9, the seismic test of the control rod drive line in the high-temperature liquid metal is simulated.

[0044] In specific tests, multiple actuators are installed using horizontal or vertical heat-insulated actuator supports, depending on the specific circumstances. The test body is then installed inside the mounting flange 1 of the horizontal heat-insulated actuator support or on the mounting base plate 16 of the vertical heat-insulated actuator support. Cooling medium is introduced to cool the heat generated by the test body, thereby preventing the actuator from being affected by heat.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0046] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0047] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A drive-line seismic test simulation support structure for high-temperature liquid metal stacks, characterized in that: It includes an upper flange assembly (1), a middle upper flange assembly (4), a middle lower flange assembly (6), and a lower flange assembly (9); an upper inner cylinder assembly (2) is installed between the upper flange assembly (1) and the middle upper flange assembly (4). The upper inner cylinder assembly (2) is cylindrical, with an upper decoupling assembly (11) installed on the outer side of its upper half and an upper outer cylinder assembly (3) installed on its lower half. A middle inner cylinder assembly (5) is installed between the middle upper flange assembly (4) and the middle lower flange assembly (6). A middle decoupling assembly (13) is located outside the middle inner cylinder assembly (5). A middle insulation cotton assembly (14) is located between the middle inner cylinder assembly (5) and the middle decoupling assembly (13). Between the middle and lower flange assembly (6) and the lower flange assembly (9) there is a lower inner cylinder assembly (7). The lower decoupling assembly (15) is installed on the outer side of the upper half of the lower inner cylinder assembly (7), and the lower outer cylinder assembly (8) is installed on the lower half. The bottom support cylinder assembly (10) is installed at the lower end of the lower flange assembly (9); The upper inner cylinder assembly (2), the middle inner cylinder assembly (5), and the lower inner cylinder assembly (7) form the inner cylinder (20), and the electric heating element (17) is located inside the inner cylinder (20).

2. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 1, characterized in that: An upper insulation cotton assembly (12) is provided between the upper inner cylinder assembly (2) and the upper decoupling assembly (11) or the upper outer cylinder assembly (3); a lower insulation cotton assembly (16) is provided between the lower inner cylinder assembly (7) and the lower decoupling assembly (15) or the lower outer cylinder assembly (8).

3. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 2, characterized in that: The top of the cylinder (20) has an inner cylinder upper flange (18), and the bottom has an inner cylinder lower flange (19).

4. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 3, characterized in that: The electric heating element (17) is located inside the inner cylinder (20).

5. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 4, characterized in that: The upper outer cylinder assembly (3) has the same structure as the lower outer cylinder assembly (8), including an outer cylinder (23). The top of the outer cylinder (23) is the upper flange (21), the bottom is the lower flange (22), and the side of the outer cylinder (23) has an outer cylinder pipe (24).

6. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 5, characterized in that: The upper flange assembly (1), the middle upper flange assembly (4), the middle lower flange assembly (6), and the lower flange assembly (9) have the same structure, including a main flange (29), a hinge rod connection assembly (30), a support rod connection assembly (31), and a horizontal actuator connection assembly (32). The main flange (29) is connected to the upper and lower parts, while the horizontal actuator connection assembly (32) is connected to the horizontal actuator.

7. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 6, characterized in that: The bottom support cylinder assembly (10) includes a bottom support cylinder (26), the top of which is a bottom support cylinder flange (25), and the bottom is a bottom support plate (28). The bottom support cylinder (26) has a medium filling and draining pipe (27) on its side. High-temperature liquid metal enters from the medium filling and draining pipe (27) and flows into the inner cylinder (20).

8. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 7, characterized in that: The outer cylinder (23) and the bottom support cylinder (26) have outer cylinder pipes on their sides.

9. The drive-line seismic test simulation support structure for high-temperature liquid metal stacks according to claim 8, characterized in that: During the seismic test, high-temperature liquid metal enters from the medium filling and draining pipe (27) and flows into the inner cylinder (20). The electric heating element (17) heats the high-temperature liquid metal and simulates an earthquake by applying lateral force to the positions of the upper flange assembly (1), the middle upper flange assembly (4), the middle lower flange assembly (6), and the lower flange assembly (9).

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