A safe and convenient insulation structure for high-temperature liquid metal corrosion equipment

Abstract

The present invention provides a safe and convenient insulation structure for a high-temperature liquid metal corrosion device, comprising a slide rail, a negative tolerance insulation shell, and a fire-resistant insulation base. The multi-layer insulation structure composed of insulating ceramics and flexible insulation materials and the negative tolerance insulation shell reduce the heat loss of the high-temperature corrosion tank body; the metal shell completely covers the structure, thereby solving the problem of exposed asbestos insulation materials and preventing dust from being inhaled into the lungs of operators and endangering their health; the sliding opening and closing structure solves the problem of the insulation materials used for wrapping being easily damaged and having a short lifespan after repeated disassembly, while also avoiding the problem of experimental personnel being easily burned when wrapping the insulation materials outside the high-temperature corrosion tank body. The present invention provides an efficient, safe, and convenient insulation structure for a high-temperature liquid metal corrosion device, which can provide good hardware support for a research platform for the compatibility of high-temperature liquid metal and materials.

Description

Technical Field

[0001] The present invention relates to the research field of material corrosion and protection, and in particular to a safe and convenient heat-insulating structure for a high-temperature liquid metal corrosion device. Background Art

[0002] Currently, materials are a significant limitation to the development of nuclear fusion energy. The blanket is a crucial component for fusion reactors to achieve irradiation shielding, tritium self-sustaining, and energy conversion. The blanket module generally consists of the plasma-facing first wall material, structural materials, tritium breeder, neutron multiplier, and coolant. Liquid metal lithium / lithium-lead blankets have become one of the most widely considered fusion reactor blanket concepts both domestically and internationally due to their excellent neutron economy, high tritium multiplication capacity, excellent thermal conductivity and heat transfer capacity, and adaptability to complex tokamak geometries.

[0003] However, liquid metal is corrosive to most solid metal materials, such as stainless steel, especially under the high-temperature, fluid conditions of liquid metal lithium / lithium-lead blankets. Corrosion is a pressing issue for structural and functional materials operating in the liquid lithium / lithium-lead blanket environment of fusion reactors. Researching the corrosion characteristics of high-temperature liquid metal and fusion reactor materials, and identifying methods to mitigate / inhibit material corrosion, is crucial for the safe operation of fusion reactors. Commonly used insulation materials and devices present challenges when insulating high-temperature liquid metal corrosion experimental devices. These challenges are due to the following: 1. Asbestos-based insulation materials are exposed, and dust can easily be inhaled into the lungs of operators, causing health problems; 2. Experimenters are susceptible to burns when wrapping insulation around the corrosion tank; 3. Repeated removal of the insulation material can easily damage the wrapping, resulting in poor reusability. To address these challenges, an efficient, safe, and convenient insulation structure for high-temperature liquid metal corrosion devices has been designed. Summary of the Invention

[0004] The purpose of the present invention is to remedy the defects of the existing technology and provide a safe and convenient insulation structure for high-temperature liquid metal corrosion equipment, thereby achieving efficient insulation of the corrosion tank body and reducing the harm of asbestos insulation materials to operators.

[0005] The present invention is achieved through the following technical solutions:

[0006] A safe and convenient insulation structure for a high-temperature liquid metal corrosion device includes a slide rail, a negative tolerance insulation shell, and a fire-resistant insulation base. The high-temperature liquid metal in the present invention is, for example, liquid metal lithium.

[0007] Furthermore, the slide rails are mounted on the support platform and include linear guides and sliders. The linear guides are two cross-roller guides, mounted to the support platform via six bolts, with a certain spacing between the two linear guides. The eight sliders are distributed in two groups on the two linear guides and connected to the metal outer shell of the negative tolerance insulation shell via bolts.

[0008] Furthermore, the negative tolerance insulation shell is divided into two halves, and each half contains three parts, a metal outer shell, an inner insulation shell, and a flexible high-temperature resistant insulation filler. The bottom of the metal outer shell is connected to the slider, and the metal outer shell includes: a 304 stainless steel body, a handle, and a tensioning mechanism; the handle and the tensioning mechanism are installed on the outside of the body. The inner insulation shell is in direct contact with the high-temperature corrosion tank body, and includes: special-shaped insulation ceramics, a support structure; the metal outer shell and the edge of the inner insulation shell are connected by a concave-convex matching structure, and the gap between the outer shell and the inner insulation shell is filled with a flexible high-temperature resistant insulation filler. The inner side of the inner insulation shell and the high-temperature corrosion tank body are designed with a negative tolerance. The tensioning mechanism on the outside of the outer shell can achieve a tight fit between the inner wall of the inner insulation shell and the high-temperature corrosion tank body to prevent the loss of heat from the surface of the corrosion tank body. Taking a cylindrical corrosion tank with a CF100 flange, an outer diameter of 104mm and a height of 274mm as an example, the special-shaped thermal insulation ceramic is divided into three parts: upper, middle and lower. The upper special-shaped thermal insulation ceramic is semi-circular with an inner diameter of 40mm, an outer diameter of 205mm and a height of 43mm, which is used to hold the slender transition section between the CF100 flange and the bellows; the middle special-shaped thermal insulation ceramic is semi-circular with an inner diameter of 160mm, an outer diameter of 240mm and a height of 77mm, which is used to hold the flange of the corrosion tank; the bottom special-shaped thermal insulation ceramic is also semi-circular with an inner diameter of 104.5mm m, outer diameter 185mm, height 165mm, used to hold the cylindrical body of the high-temperature corrosion tank; each special-shaped thermal insulation ceramic is provided with multiple through holes, with a hole spacing of 40mm, a row spacing of 40mm, and an inner diameter of 10mm. The special-shaped thermal insulation ceramic is connected to the supporting structure by bolts, and the longitudinal special-shaped thermal insulation ceramics are separated by strip-shaped supporting structures as partitions; the supporting structure is made of 3mm stainless steel bent and welded, and fits tightly with the special-shaped thermal insulation ceramics. The lower surface of the supporting structure is welded to the bottom plate of the metal outer shell, and the supporting structure plays a role of horizontal fixation and longitudinal support.

[0009] The refractory and thermal insulation base is made of a refractory and thermal insulation material with a certain mechanical strength. It features a deep groove with a specific shape on the top for securing the heating crucible and the corrosion tank. For example, for a cylindrical corrosion tank with an outer diameter of 104mm and a height of 274mm, the refractory and thermal insulation base is cylindrical with an outer diameter of 272mm and a height of 150mm. The top groove has an inner diameter of 124mm and a depth of 70mm, which is used to secure the heating crucible and the corrosion tank.

[0010] The present invention has the following beneficial effects:

[0011] (1) The safe and convenient insulation structure for a high-temperature liquid metal corrosion device of the present invention has high safety. The multi-layer insulation structure composed of insulation ceramics and flexible insulation materials and the negative tolerance insulation shell reduce the heat loss of the high-temperature corrosion tank body. The sliding opening and closing structure can effectively avoid the high temperature from causing harm to the safety of users and equipment. The metal shell is completely covered to solve the problem of exposed asbestos insulation materials and prevent dust from being inhaled into the lungs of operators, thereby endangering their health.

[0012] (2) The safe and convenient insulation structure for a high-temperature liquid metal corrosion device of the present invention has high efficiency and convenient operability. By opening and closing the negative tolerance insulation shell of the sliding opening and closing structure, the high-temperature corrosion tank body can be quickly covered and uncovered. At the same time, the modular insulation shell design makes the insulation and maintenance of the corrosion device more convenient, reducing maintenance costs and operating difficulty;

[0013] (3) The safe and convenient insulation structure for a high-temperature liquid metal corrosion device of the present invention has high stability. By adopting a negative tolerance insulation shell with a sliding opening and closing structure, the problem of the insulation material used for wrapping being easily damaged and having a short life after repeated disassembly is solved; the use of high-efficiency thermal insulation materials can effectively reduce energy loss, improve the working efficiency and performance stability of the high-temperature liquid metal corrosion device, and extend its service life;

[0014] (4) The present invention provides an efficient, safe and convenient thermal insulation structure for a high-temperature liquid metal corrosion device, which can provide good hardware support for a high-temperature liquid metal and material compatibility research platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 Schematic diagram of the slide rail and fire-resistant insulation base.

[0017] Figure 3 Top view of the insulation shell with negative tolerance

[0018] Figure 4 This is the inside view of the insulation shell with half negative tolerance.

[0019] In the figure, 1 is a slide rail; 2 is a negative tolerance insulation shell; 3 is a refractory insulation base; 4 is a support platform; 5 is a linear guide rail; 6 is a slider; 7 is a metal outer shell; 8 is an inner insulation shell; 9 is a flexible high-temperature resistant insulation filler; 10 is a 304 stainless steel body; 11 is a handle; 12 is a tensioning mechanism; 13 is a corrosion tank body; 14 is a special-shaped insulation ceramic; 14-1 is an upper special-shaped insulation ceramic; 14-2 is a middle special-shaped insulation ceramic; 14-3 is a bottom special-shaped insulation ceramic; 15 is a support structure; 16 is a heating crucible. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are intended only to explain the present invention, and the scope of protection of the present invention should include the entire contents of the claims. Moreover, through the description of the following embodiments, those skilled in the art can fully implement the entire contents of the claims of the present invention.

[0021] like Figure 1-4 As shown, a safe and convenient insulation structure for a high-temperature liquid metal corrosion device includes a slide rail 1, a negative tolerance insulation shell 2 and a fire-resistant insulation base 3.

[0022] The slide rail 1 is mounted on a support platform 4 and includes linear guides 5 and sliders 6. The linear guides are two cross-roller guides, mounted to the support platform 4 via six bolts, with a certain spacing between them. The eight sliders 6 are distributed in two groups on the two linear guides 5 and connected to the metal outer shell 7 of the negative tolerance insulation shell 2 via bolts.

[0023] The negative tolerance insulation shell 2 is divided into two halves, each containing three parts: a metal outer shell 7, an inner insulation shell 8, and a flexible, high-temperature-resistant, insulating filler 9. The bottom of the metal outer shell 7 is connected to the slider 6. The metal outer shell 7 comprises a 304 stainless steel body 10, a handle 11, and a tensioning mechanism 12. The handle 11 and tensioning mechanism 12 are mounted on the outside of the 304 stainless steel body 10. The inner insulation shell 8 directly contacts the high-temperature corrosion tank 13 and comprises a special-shaped insulating ceramic 14 and a support structure 15. The edges of the metal outer shell 7 and the inner insulation shell 8 are connected by a concave-convex fitting structure, and the gap between the metal outer shell 7 and the inner insulation shell 8 is filled with a flexible, high-temperature-resistant, insulating filler 9. A negative tolerance design is implemented between the inner side of the inner insulation shell 8 and the high-temperature corrosion tank 13. The tensioning mechanism 12 on the outside of the metal outer shell 7 ensures a tight fit between the inner wall of the inner insulation shell 8 and the high-temperature corrosion tank 13, preventing heat loss from the surface of the high-temperature corrosion tank 13. The special-shaped insulating ceramic 14 is divided into three parts: upper, middle and lower. The upper special-shaped insulating ceramic 14-1 is semi-circular and is used to hold the slender transition section between the high-temperature corrosion tank flange and the bellows; the middle special-shaped insulating ceramic 14-2 is semi-circular and is used to hold the high-temperature corrosion tank flange; the bottom special-shaped insulating ceramic 14-3 is still semi-circular and is used to hold the main body of the high-temperature corrosion tank; each special-shaped insulating ceramic 14 has multiple through holes, and the special-shaped insulating ceramic 14 is connected to the support structure 15 by bolts. There is a strip support structure 15 between the longitudinal special-shaped insulating ceramics 14 as a partition; the support structure 15 is made of stainless steel by bending and welding, and fits tightly with the special-shaped insulating ceramic 14. The lower surface of the support structure 15 is welded to the bottom plate of the metal outer shell 7, and the support structure 15 plays a role of horizontal fixation and longitudinal support.

[0024] Taking a cylindrical corrosion tank with a CF100 flange, an outer diameter of 104mm and a height of 274mm as an example, the special-shaped thermal insulation ceramic is divided into three parts: upper, middle and lower. The upper special-shaped thermal insulation ceramic is semi-circular with an inner diameter of 40mm, an outer diameter of 205mm and a height of 43mm, which is used to hold the slender transition section between the CF100 flange and the bellows; the middle special-shaped thermal insulation ceramic is semi-circular with an inner diameter of 160mm, an outer diameter of 240mm and a height of 77mm, which is used to hold the flange of the corrosion tank; the bottom special-shaped thermal insulation ceramic is also semi-circular with an inner diameter of 104.5 mm, outer diameter 185mm, height 165mm, used to hold the cylindrical body of the high-temperature corrosion tank; each special-shaped thermal insulation ceramic is provided with multiple through holes, with a hole spacing of 40mm, a row spacing of 40mm, and an inner diameter of 10mm. The special-shaped thermal insulation ceramic is connected to the supporting structure by bolts, and there is a strip-shaped supporting structure between the special-shaped thermal insulation ceramics as a partition; the supporting structure is made of 3mm stainless steel bent and welded, and fits tightly with the special-shaped thermal insulation ceramic. The lower surface of the supporting structure is welded to the bottom plate of the metal outer shell, and the supporting structure plays a role of horizontal fixation and longitudinal support.

[0025] The refractory and heat-insulating base 3 is made of a refractory and heat-insulating material with a certain mechanical strength. A deep groove of a certain shape is opened on the top to fix the heating crucible 16 and the corrosion tank body 13. Taking a cylindrical corrosion tank body with an outer diameter of 104mm and a height of 274mm as an example, the refractory and heat-insulating base is cylindrical with an outer diameter of 272mm and a height of 150mm. A deep groove with an inner diameter of 124mm and a depth of 70mm is opened on the top to fix the heating crucible and the corrosion tank body.

[0026] The following further describes the use of the present invention with reference to the accompanying drawings:

[0027] (1) Pull the metal outer shell 7 along the slide rail 1 through the handle 11 to open the negative tolerance insulation shell 2 and expose the fire-resistant insulation base 3.

[0028] (2) The corrosion tank 13 containing the corrosion medium and the sample is placed in the heating crucible 16 in the refractory insulation base 3 and fixed.

[0029] (3) Push the handle 11 on the metal outer shell, and the negative tolerance insulation shell 2 slides along the slide rail 1 to wrap the corrosion tank 13. Then, the tensioning mechanism 12 on the metal outer shell 7 is used to hold the two halves of the negative tolerance insulation shell 2 tightly, so that the inner wall of the inner insulation shell 8 fits tightly against the corrosion tank 13, achieving fixation and efficient insulation.

[0030] (4) The corrosion tank 13 is heated to the desired experimental temperature by heating the crucible 16 and maintained for a certain period of time.

[0031] (5) After the corrosion test time is over, the heating of the heating crucible 16 in the refractory insulation base 3 is stopped, and the corrosion tank body 13 is allowed to cool naturally to room temperature.

[0032] (6) Loosen the tensioning mechanism 12 on the metal outer shell 7, pull the handle 11 to open the negative tolerance insulation shell 2, expose the corrosion tank 13 and take it out, and then analyze the corrosion characteristics of the material sample.

[0033] (7) Push the handle 11 to reset the negative tolerance insulation shell 2.

[0034] (8) Repeat steps (1)-(7) to continue the relevant experiments.

[0035] The present invention does not describe in detail parts that belong to the common knowledge of those skilled in the art. The above-described embodiments are merely descriptions of preferred embodiments of the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Without departing from the spirit of the present invention, various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A safe and convenient insulation structure for a high-temperature liquid metal corrosion device, characterized by: It comprises a slide rail (1) and a negative tolerance heat-insulating shell (2); The slide rail (1) is mounted on the support platform (4), and the slide rail (1) includes a linear guide rail (5) and a slider (6). The linear guide rail (5) is two cross roller guide rails, which are mounted on the support platform (4) by bolts, and the two linear guide rails have a spacing; the slider (6) is divided into two groups and distributed on the two linear guide rails (5), and is connected to the metal outer shell (7) of the negative tolerance insulation shell (2) by bolts; The negative tolerance heat-insulating shell (2) is divided into two halves, each half comprising three parts: a metal outer shell (7), an inner heat-insulating shell (8) and a flexible high-temperature resistant heat-insulating filler (9); the bottom of the metal outer shell (7) is connected to the slider (6), and the metal outer shell (7) comprises: a 304 stainless steel body (10), a handle (11) and a tensioning mechanism (12); the handle (11) and the tensioning mechanism (12) are mounted on the outside of the 304 stainless steel body (10); the inner heat-insulating shell (8) is directly The inner heat-insulating shell (8) is in contact with the high-temperature corrosion tank (13), and includes: a special-shaped heat-insulating ceramic (14) and a supporting structure (15); the metal outer shell (7) and the inner heat-insulating shell (8) are connected at the edge by a concave-convex matching structure, and the gap between the metal outer shell (7) and the inner heat-insulating shell (8) is filled with a flexible high-temperature resistant heat-insulating filler (9); the inner side of the inner heat-insulating shell (8) and the high-temperature corrosion tank (13) are designed with a negative tolerance, and the tensioning mechanism (12) on the outer side of the metal outer shell (7) is used to tighten the inner heat-insulating shell (8). ) can realize the fitting of the inner wall of the inner insulation shell (8) and the high-temperature corrosion tank body (13); the special-shaped thermal insulation ceramic (14) is divided into three parts: the upper special-shaped thermal insulation ceramic (14-1) is a semi-circular ring, used to hold the slender transition section between the high-temperature corrosion tank body flange and the bellows; the middle special-shaped thermal insulation ceramic (14-2) is a semi-circular ring, used to hold the high-temperature corrosion tank body flange; the bottom special-shaped thermal insulation ceramic (14-3) is also a semi-circular ring, used to hold the cylindrical main body of the high-temperature corrosion tank body body; each piece of special-shaped thermal insulation ceramic (14) is provided with a plurality of through holes, the special-shaped thermal insulation ceramic (14) and the support structure (15) are connected by bolts, and the special-shaped thermal insulation ceramic (14) is separated by a strip-shaped support structure (15); the support structure (15) is made of stainless steel by bending and welding, and is fitted with the special-shaped thermal insulation ceramic (14). The lower surface of the support structure (15) is welded to the bottom plate of the metal outer shell (7), and the support structure (15) plays a role of horizontal fixing and longitudinal support; The heat-insulating structure further comprises: a refractory heat-insulating base (3), wherein the refractory heat-insulating base (3) is a refractory heat-insulating material with mechanical strength, and a groove is provided on the top for fixing the heating crucible (16) and the corrosion tank (13).

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