A hydrothermal corrosion test auxiliary device for silicon carbide pipe connectors

Abstract

The utility model discloses a kind of silicon carbide pipe connecting piece hydrothermal corrosion test auxiliary devices, including the base for supporting silicon carbide pipe, the force applying element for giving end plug action force, the supporting element for supporting force applying element;The supporting element is installed on base;The force applying element is connected with supporting element, and is penetrated into silicon carbide pipe, and is touched with end plug top.This utility model in, through base support silicon carbide pipe, and by force applying element to end plug exert force, end plug can be simulated in actual application scene actual stress, without complex process and cost controllable.Silicon carbide pipe connecting piece is fixed and forced after through hydrothermal corrosion test auxiliary device, it is placed into autoclave with hydrothermal corrosion test auxiliary device, and corrosion test is carried out under the set operating condition.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary testing equipment, and in particular to an auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors. Background Technology

[0002] Silicon carbide (SiC), with its superior properties such as high strength, high temperature resistance, corrosion resistance, and low neutron absorption cross section, has become a key candidate material for high-temperature and corrosion-resistant structural components such as nuclear fuel cladding tubes. Compared with traditional zirconium alloy cladding, its reaction rate with water is significantly reduced under extreme operating conditions, effectively preventing hydrogen explosion accidents caused by hydrogen production. Its outstanding safety and stability advantages make its application value in high-end fields such as the nuclear industry increasingly prominent.

[0003] In the research and development and performance verification phase of silicon carbide components, hydrothermal corrosion testing is a core step in assessing their long-term service reliability, especially for the corrosion performance evaluation of silicon carbide tube connectors (which consist of a silicon carbide tube and an end plug, with the end plug connected to the end of the silicon carbide tube via a glass bonding process; the glass bonding process uses glass as a solder). However, existing testing methods have significant limitations: current experiments mostly conduct hydrothermal corrosion tests on silicon carbide tube connectors under natural, pressureless conditions of the end plug, which cannot realistically simulate the stress environment they experience in actual application scenarios (such as inside a nuclear reactor). To fully reproduce the working conditions inside a reactor, additional core blocks need to be loaded to simulate actual stress. This process is not only complex and requires stringent experimental conditions, but also significantly reduces testing efficiency and increases equipment, material, and time costs, making it difficult to meet the needs of efficient and low-cost research and development testing.

[0004] Therefore, developing an auxiliary device that can conveniently and accurately apply pressure to silicon carbide tube connectors during hydrothermal corrosion testing, without the need for complex processes and with controllable costs, has become a key requirement for breaking through current testing bottlenecks and promoting the performance optimization and engineering application of silicon carbide components. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an auxiliary device for testing the hydrothermal corrosion of silicon carbide pipe connectors.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: An auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors includes a base for supporting the silicon carbide pipe, a force-applying component for applying force to the end plug, and a support component for supporting the force-applying component. The support member is mounted on the base; The force-applying component is connected to the support component and passes through the silicon carbide tube, contacting the top of the end plug.

[0007] In this technical solution, the silicon carbide tube is supported by a base, and the end plug is subjected to force by a force-applying component, which can simulate the actual force on the end plug in the actual application scenario. This method does not require complex processes and the cost is controllable.

[0008] After the silicon carbide pipe connector is fixed and stressed by the hydrothermal corrosion testing auxiliary device, it is placed in the autoclave together with the hydrothermal corrosion testing auxiliary device and subjected to corrosion testing under the set working conditions.

[0009] Furthermore, the base is U-shaped, and its bottom is provided with a through hole for the end plug to pass through; The silicon carbide tube is placed within the U-shaped space of the base and positioned above the through hole; The support component is installed at the U-shaped opening of the base; The diameter of the through hole is larger than the diameter of the end plug, but smaller than the outer diameter of the silicon carbide tube.

[0010] In this technical solution, the diameter of the through hole is larger than the diameter of the end plug. When the end plug separates from the silicon carbide tube due to corrosion, it facilitates the end cap to pass through the through hole and detach from the silicon carbide tube, making the hydrothermal corrosion test results of the silicon carbide tube connector more obvious. Conversely, the diameter of the through hole is smaller than the outer diameter of the silicon carbide tube to prevent the silicon carbide tube from passing through the through hole and affecting the hydrothermal corrosion test results of the silicon carbide tube connector.

[0011] Furthermore, the force-applying components include bolts and springs; The bolt is threadedly connected to the support and inserted into the silicon carbide tube; One end of the spring is connected to the bottom of the bolt, and the other end is in contact with the top of the end plug.

[0012] In this technical solution, the pressure applied to the end plug can be conveniently and precisely adjusted by rotating the bolt to compress the spring. The applied pressure F can be calculated using Hooke's Law, as shown in the following formula: F=X*K Where X is the compression of the spring (i.e., the distance the bolt moves downward), and K is the stiffness coefficient of the spring (known).

[0013] Furthermore, the diameter of the circular cross-section of the bolt shank and the outer diameter of the spring are both smaller than the inner diameter of the silicon carbide tube, to avoid interference between the bolt shank and the spring and the inner wall of the silicon carbide tube, thereby affecting the force provided to the end plug by the force-applying component.

[0014] Furthermore, limiting connecting posts are provided on both sides of the U-shaped opening of the base; The support member is provided with a limiting connection hole that is adapted to the limiting connection post. The support member is fixedly connected to the base through the cooperation of the limiting connection hole and the limiting connection post.

[0015] Furthermore, the base includes sidewalls and a base; The sidewalls are positioned opposite each other on the base, forming a U-shaped structure with the base. The sidewalls and the base are integrally formed, thereby ensuring the stability of the base.

[0016] Furthermore, the base is a stainless steel base.

[0017] Compared with existing technologies, the principles and advantages of this technical solution are as follows: 1. By supporting the silicon carbide tube with a base and applying force to the end plug through a force-applying component, the actual stress on the end plug in real-world application scenarios can be simulated. This method requires no complex processes and is cost-effective. After the silicon carbide tube connector is fixed and stressed by the hydrothermal corrosion testing auxiliary device, it is placed together with the auxiliary device in an autoclave and subjected to corrosion testing under set operating conditions.

[0018] 2. The diameter of the through hole is larger than the diameter of the end plug. When the end plug separates from the silicon carbide tube due to corrosion, it facilitates the end cap to pass through the through hole and detach from the silicon carbide tube, making the hydrothermal corrosion test results of the silicon carbide tube connector more obvious. Conversely, the diameter of the through hole is smaller than the outer diameter of the silicon carbide tube to prevent the silicon carbide tube from passing through the through hole and affecting the hydrothermal corrosion test results of the silicon carbide tube connector.

[0019] 3. By rotating the bolt to compress the spring, the pressure applied to the end plug can be conveniently and precisely adjusted. The applied pressure F can be calculated using Hooke's Law.

[0020] 4. The diameter of the circular cross-section of the bolt shank and the outer diameter of the spring are both smaller than the inner diameter of the silicon carbide tube. This avoids interference between the bolt shank and the spring and the inner wall of the silicon carbide tube, thus preventing the force applied by the force-applying component from reaching the end plug. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the services required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the base structure in an auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the silicon carbide tube and the end plug after separation in a silicon carbide tube connector. Figure 4 A schematic diagram showing the silicon carbide tube connector placed within the U-shaped space of the base; Figure 5 This is a schematic diagram of the force-applying component in an auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to an embodiment of this utility model.

[0023] Figure label: 1-Base; 2-Force-applying component; 3-Support component; 4-Silicon carbide tube; 5-End plug; 6-Through hole; 7-Bolt; 8-Spring; 9-Limiting connecting post; 10-Limiting connecting hole; 11-Side wall; 12-Base. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments: like Figures 1 to 5 As shown in the figure, the auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors described in this embodiment includes a base 1 for supporting silicon carbide pipe 4, a force-applying component 2 for applying force to end plug 5, and a support component 3 for supporting the force-applying component 2. Specifically, in this embodiment, the base 1 is U-shaped, and its bottom is provided with a through hole 6 for the end plug 5 to pass through; the silicon carbide tube 4 is placed in the U-shaped space of the base 1 and is located above the through hole 6; the diameter of the through hole 6 is larger than the diameter of the end plug 5 and smaller than the outer diameter of the silicon carbide tube 4.

[0025] Specifically, in this embodiment, the base 1 has limiting connecting posts 9 on both sides of the U-shaped opening, and the support member 3 has limiting connecting holes 10 that are adapted to the limiting connecting posts 9. The support member 3 is installed at the U-shaped opening of the base 1 through the limiting connecting holes 10 and the limiting connecting posts 9. Specifically, in this embodiment, the force-applying component 2 includes a bolt 7 and a spring 8; the bolt 7 is threadedly connected to the support component 3 and inserted into the silicon carbide tube 4; one end of the spring 8 is connected to the bottom of the bolt 7, and the other end contacts the end plug 5. The diameter of the circular cross-section of the bolt 7 and the outer diameter of the spring 8 are both smaller than the inner diameter of the silicon carbide tube 4.

[0026] Specifically, in this embodiment, the base 1 is made of 316L stainless steel and includes a side wall 11 and a base 12. The side wall 11 is disposed opposite to the base 12, forming a U-shaped structure with the base 12, and the side wall 11 and the base 12 are integrally formed.

[0027] The working principle of this embodiment is as follows: By supporting the silicon carbide tube 4 with the base 1 and applying force to the end plug 5 through the force-applying component 2, the actual stress on the end plug 5 in real-world application scenarios can be simulated, eliminating the need for complex processes and keeping costs under control. After the silicon carbide tube connector is fixed and stressed by the hydrothermal corrosion testing auxiliary device, it is placed together with the hydrothermal corrosion testing auxiliary device in an autoclave and subjected to corrosion testing under set operating conditions (such as 360℃ and 18.6MPa).

[0028] The diameter of the through hole 6 is larger than the diameter of the end plug 5 (i.e., Figure 3 In the section on width a), when the end plug 5 separates from the silicon carbide tube 4 due to corrosion, it facilitates the end cap to pass through the through hole 6, thereby detaching from the silicon carbide tube 4, making the hydrothermal corrosion test results of the silicon carbide tube connector more obvious. The diameter of the through hole 6 is smaller than the outer diameter of the silicon carbide tube 4, preventing the silicon carbide tube 4 from passing through the through hole 6 and affecting the hydrothermal corrosion test results of the silicon carbide tube connector.

[0029] When force is applied to end plug 5 by force-applying component 2, the pressure applied to end plug 5 can be conveniently and precisely adjusted by rotating bolt 7 to compress spring 8. The applied pressure F can be calculated using Hooke's Law, as shown in the following formula: F=X*K Where X is the compression of spring 8 (i.e., the distance bolt 7 moves downward), and K is the stiffness coefficient of spring 8 (known).

[0030] The diameter of the circular cross section of the bolt 7 shank and the outer diameter of the spring 8 are both smaller than the inner diameter of the silicon carbide tube 4, which can prevent the bolt 7 shank and the spring 8 from interfering with the inner wall 11 of the silicon carbide tube 4, thereby affecting the force provided by the force-applying component 2 to the end plug 5.

[0031] The side wall 11 is disposed opposite to the base 12, forming a U-shaped structure with the base 12, and the side wall 11 and the base 12 are integrally formed, thereby ensuring the firmness of the base 1.

[0032] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors, characterized in that, It includes a base for supporting the silicon carbide tube, a force-applying component that applies force to the end plug, and a support component for supporting the force-applying component; The support member is mounted on the base; The force-applying component is connected to the support component and passes through the silicon carbide tube, contacting the top of the end plug.

2. The auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 1, characterized in that, The base is U-shaped, and its bottom is provided with a through hole for the end plug to pass through; The silicon carbide tube is placed within the U-shaped space of the base and positioned above the through hole; The support component is installed at the U-shaped opening of the base; The diameter of the through hole is larger than the diameter of the end plug, but smaller than the outer diameter of the silicon carbide tube.

3. The auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 1 or 2, characterized in that, The force-applying components include bolts and springs; The bolt is threadedly connected to the support and inserted into the silicon carbide tube; One end of the spring is connected to the bottom of the bolt, and the other end is in contact with the top of the end plug.

4. The auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 3, characterized in that, The diameter of the circular cross-section of the bolt shank and the outer diameter of the spring are both smaller than the inner diameter of the silicon carbide tube.

5. The auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 2, characterized in that, The base has limiting connecting posts on both sides of the U-shaped opening; The support member is provided with a limiting connection hole that is adapted to the limiting connection post. The support member is fixedly connected to the base through the cooperation of the limiting connection hole and the limiting connection post.

6. An auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 2 or 5, characterized in that, The base includes sidewalls and a base; The sidewalls are positioned opposite each other on the base, forming a U-shaped structure with the base, and the sidewalls and the base are integrally formed.

7. The auxiliary device for hydrothermal corrosion testing of silicon carbide pipe connectors according to claim 6, characterized in that, The base is a stainless steel base.

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