A multi-directional flange connection expansion blind plate
Patent Information
- Application Number
- CN202522243951.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-23
AI Technical Summary
然后传统方形盲板虽满足人员通道与真空密封基础需求，但是中平面等离子体诊断黄金区域，需优先保障诊断设备与加料装置安装以实现参数精准测量，NCST盲板仅作为真空壁，未开发中平面核心位置功能，导致紧缺窗口资源限制，同时现有盲板采用橡胶圈密封，但贴合面无约束结构，仅靠摩擦力定位，易导致密封圈內滑而密封失效，破坏真空环境；
本申请提供的一种多向法兰连接拓展盲板增加三个实用法兰接口，为NCST相关诊断接入提供了窗口。通过将基础盲板基体安装在托卡马克真空室外侧，密封凹槽内预先放置好的密封圈与真空室的接触表面紧密贴合，密封圈具有良好的弹性与密封性，在受到一定压力时发生弹性形变，从而填充密封凹槽与真空室表面之间的微小间隙，形成可靠的密封屏障，保障真空室内真空环境的稳定性，第一法兰接口垂直设置于基础盲板基体的中间区域，且其中心线精准对准托卡马克装置的中心点，该结构可实现核心诊断窗口的精准安装，使窗口探测方向针对等离子体核心区域，第二法兰接口采用倾斜布置，能够适配特殊角度的诊断窗口安装需求，使特定方向的诊断设备可按合理角度与盲板对接，有效优化诊断光路或探测路径的布置合理性，第三法兰接口的中心线与磁轴相切，此布局专为磁轴相关的特殊诊断窗口设计，能够保证诊断窗口安装后其探测范围可精准覆盖磁轴区域。中间窗口对准离子体核心，适配高速相机等核心观测设备，一侧窗口与磁轴相切，精准对接Hα阵列诊断，另一侧窗口预留加料或额外诊断接口，布局与诊断场景匹配，无需额外调整设备安装角度，同时窗口集中于中平面位置，避免占用其他功能区域。
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Figure CN224841285U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of magnetic confinement nuclear fusion technology, and more specifically, to a multi-directional flange connection extension blind plate. Background Technology
[0002] The core requirement of magnetic confinement nuclear fusion devices such as tokamaks is a stable ultra-high vacuum environment. The structure of the vacuum chamber directly determines the operational reliability and experimental effectiveness. The square blind plate is a key component of the vacuum chamber: it serves as an openable wall for personnel to enter and exit for maintenance, a sealed isolation during operation, and maintains the ultra-high vacuum inside the chamber to ensure the stability of plasma confinement. The vacuum chamber window of a tokamak needs to accommodate heating and diagnostic requirements. The mid-plane window, corresponding to the plasma core region, is crucial for parameter measurement and fuel injection, and space resources are scarce. Square blind flanges are widely used due to their large opening area, facilitating personnel access. The NCST tokamak adopts this design, installing it in the mid-plane to form an openable, sealed wall. Meanwhile, tokamaks need to undergo baking and degassing at 120℃-150℃ during operation, and the plasma discharge generates strong electromagnetic shocks, placing stringent requirements on the blind flange seal. The mainstream rubber ring seal is widely used due to its ease of installation, and the NCST tokamak blind flange also adopts this form. While traditional square blind flanges meet the basic requirements for personnel access and vacuum sealing, the golden area for plasma diagnostics in the mid-plane needs to prioritize the installation of diagnostic equipment and feeding devices to achieve accurate parameter measurement. NCST blind flanges only serve as vacuum walls and have not developed the core position function in the mid-plane, resulting in limited window resources. At the same time, existing blind flanges use rubber ring seals, but the contact surface has no constraint structure and relies solely on friction for positioning, which can easily cause the sealing ring to slip inside and fail to seal, thus damaging the vacuum environment. Therefore, there is an urgent need for a multi-directional flange connection extension blind plate that integrates vacuum chamber functions and ensures reliable sealing. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0004] To this end, this application provides a multi-directional flange connection extension blind flange, adding three practical flange interfaces, providing a window for NCST-related diagnostic access.
[0005] The multi-directional flange connection extended blind flange provided in this application includes a basic blind flange base, a first flange interface, a second flange interface, and a third flange interface. The basic blind flange base is assembled outside the vacuum chamber of the tokamak. A trapezoidal protrusion is provided on the side of the basic blind flange base facing the vacuum chamber, and the trapezoidal protrusion surrounds and forms a sealing groove for accommodating a sealing ring. The first flange interface is vertically disposed in the middle region of the basic blind flange base. The second flange interface is arranged side-by-side with the first flange interface along the length of the basic blind flange base and is assembled at an angle. The center lines of both the first and second flange interfaces are aligned with the center point of the tokamak device. The third flange interface is obliquely disposed on the side of the basic blind flange base away from the second flange interface, and the center line of the third flange interface is tangent to the magnetic shaft.
[0006] In some embodiments, the first flange interface is model CF150, the second flange interface and the third flange interface are model CF100, and each of the flange interfaces conforms to the vacuum sealing standard.
[0007] In some embodiments, the nominal diameter of the second flange interface and the third flange interface are the same, and the nominal diameter of the first flange interface is larger than that of the second flange interface.
[0008] In some embodiments, the base blind flange substrate and each of the flange interfaces are integrally formed from 316L stainless steel.
[0009] In some embodiments, the four corners of the basic blind plate substrate are provided with positioning pin holes, which are adapted to the positioning structure of the tokamak vacuum chamber.
[0010] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects: This application provides a multi-directional flange connection extension blind plate that adds three practical flange interfaces, providing a window for NCST-related diagnostic access. By installing the basic blind plate substrate outside the tokamak vacuum chamber, a pre-placed sealing ring in the sealing groove tightly fits the contact surface of the vacuum chamber. The sealing ring has good elasticity and sealing performance, undergoing elastic deformation under pressure to fill the tiny gap between the sealing groove and the vacuum chamber surface, forming a reliable sealing barrier and ensuring the stability of the vacuum environment inside the vacuum chamber. The first flange interface is vertically positioned in the middle area of the basic blind plate substrate, with its centerline precisely aligned with the center point of the tokamak device. This structure enables precise installation of the core diagnostic window, ensuring the window's detection direction targets the plasma core region. The second flange interface is arranged at an angle, adapting to the installation requirements of diagnostic windows at special angles, allowing diagnostic equipment in specific directions to dock with the blind plate at a reasonable angle, effectively optimizing the layout of the diagnostic optical path or detection path. The centerline of the third flange interface is tangent to the magnetic axis. This layout is specifically designed for special diagnostic windows related to the magnetic axis, ensuring that the detection range of the diagnostic window accurately covers the magnetic axis area after installation. The central window is aligned with the plasma core, making it compatible with core observation equipment such as high-speed cameras. One side window is tangent to the magnetic axis, allowing for precise docking with the Hα array for diagnostics. The other side window is reserved for feeding or additional diagnostic interfaces. The layout matches the diagnostic scenario, eliminating the need for additional adjustments to the equipment installation angle. At the same time, the windows are concentrated in the mid-plane position, avoiding the occupation of other functional areas.
[0011] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0012] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is one of the structural schematic diagrams of a multi-directional flange connection extension blind plate according to some embodiments of this application; Figure 2 This is a second schematic diagram of the structure of a multi-directional flange connection extension blind plate according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the blind plate and tokamak vacuum chamber in some embodiments of this application; Figure 4 This is a front view structural diagram of a blind plate according to some embodiments of this application.
[0013] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Basic blind flange base; 2. First flange interface; 3. Second flange interface; 4. Third flange interface; 5. Vacuum chamber; 6. Magnetic shaft; 7. Center point. Detailed Implementation
[0014] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0015] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0016] The following reference Figures 1 to 4 This application describes a multi-directional flange connection extension blind flange provided according to some embodiments.
[0017] like Figures 1 to 4 As shown, a multi-directional flange connection extension blind flange provided according to some embodiments of this application includes a base blind flange body 1, a first flange interface 2, a second flange interface 3, and a third flange interface 4. The base blind flange body 1 is assembled outside the tokamak vacuum chamber 5. A trapezoidal protrusion is provided on the side of the base blind flange body 1 facing the vacuum chamber 5, forming a sealing groove for accommodating a sealing ring. The first flange interface 2 is vertically disposed in the middle region of the base blind flange body 1. The second flange interface 3 is arranged side-by-side with the first flange interface 2 along the length of the base blind flange body 1 and is assembled at an angle. The center lines of both the first flange interface 2 and the second flange interface 3 are directly opposite the center point 7 of the tokamak device. The third flange interface 4 is obliquely disposed on the side of the base blind flange body 1 away from the second flange interface 3, and the center line of the third flange interface 4 is tangent to the magnetic shaft 6.
[0018] In this embodiment, the basic blind plate substrate 1 is installed on the outside of the tokamak vacuum chamber 5. The sealing ring, which is pre-placed in the sealing groove, fits tightly against the contact surface of the vacuum chamber 5. The sealing ring has good elasticity and sealing performance. When subjected to a certain pressure, it undergoes elastic deformation, thereby filling the tiny gap between the sealing groove and the surface of the vacuum chamber 5, forming a reliable sealing barrier to ensure the stability of the vacuum environment inside the vacuum chamber 5. The first flange interface 2 is vertically set in the middle area of the basic blind plate substrate 1, and its center line is precisely aligned with the center point 7 of the tokamak device. This structure can achieve precise installation of the core diagnostic window, so that the window detection direction is aimed at the plasma core area. The second flange interface 3 is arranged at an angle, which can adapt to the installation requirements of diagnostic windows at special angles, so that diagnostic equipment in a specific direction can be docked with the blind plate at a reasonable angle, effectively optimizing the rationality of the arrangement of the diagnostic optical path or detection path. The center line of the third flange interface 4 is tangent to the magnetic axis 6. This layout is specially designed for special diagnostic windows related to the magnetic axis, which can ensure that the detection range of the diagnostic window can accurately cover the magnetic axis area after installation.
[0019] In this design, the central window is aligned with the plasma core, adapting to core observation equipment such as high-speed cameras. One side window is tangent to magnetic axis 6, precisely docking with the Hα array for diagnostics. The other side window is reserved for feeding or additional diagnostic interfaces. The layout matches the diagnostic scenario, eliminating the need for additional adjustments to the equipment installation angle. At the same time, the windows are concentrated in the mid-plane position, avoiding the occupation of other functional areas.
[0020] In some possible embodiments, the first flange interface 2 is model CF150, the second flange interface 3 and the third flange interface 4 are model CF100, and each flange interface conforms to the vacuum sealing standard.
[0021] In this embodiment, the CF150 and CF100 flange interfaces, which meet the vacuum sealing standard, can provide reliable sealing protection in a high vacuum environment, effectively prevent gas leakage, ensure the stability of the vacuum level inside the system, meet the needs of scientific research experiments and industrial production with high vacuum environment requirements, and the different size specifications of CF150 and CF100 allow them to be flexibly connected to pipes of different types and sizes.
[0022] In some possible embodiments, such as Figure 4 As shown, the nominal diameter of the second flange interface 3 and the third flange interface 4 are the same, while the nominal diameter of the first flange interface 2 is larger than that of the second flange interface 3.
[0023] In this embodiment, the nominal diameter difference of each flange interface is set based on the actual functional requirements of the NCST tokamak device. The first flange interface 2 is located in the middle of the blind plate, and its center line is directly opposite the center point 7 of the device, providing a channel for the high-speed camera to observe the core region of the plasma. The larger nominal diameter can ensure that the observation window has a sufficiently large field of view, avoiding the limitation of the observation range due to the small channel diameter. The center line of the second flange interface 3 is aligned with the center point 7 of the device and is used for feeding or installation of additional diagnostic equipment. The center line of the third flange interface 4 is tangent to the magnetic shaft 6 and is used for Hα array diagnostics. Both of them use CF100 flanges, which can reduce the types of flange accessories and improve the convenience of later maintenance.
[0024] In some possible embodiments, the base blind flange substrate 1 and each flange interface are integrally formed from 316L stainless steel.
[0025] In this embodiment, the 316L stainless steel contains molybdenum and has a low carbon content, making it resistant to plasma impurity corrosion and degassing conditions at 120℃-150℃. It has a low outgassing rate, ensuring high vacuum requirements. At the same time, it has high tensile strength, which can withstand vacuum pressure difference and electromagnetic shock, extending service life and reducing replacement frequency. The one-piece processing can avoid gas leakage defects such as porosity and incomplete penetration caused by welding.
[0026] In some possible embodiments, such as Figure 1 As shown, the four corners of the basic blind plate substrate 1 are provided with positioning pin holes, which are adapted to the positioning structure of the tokamak vacuum chamber 5.
[0027] In this embodiment, the positioning pin holes at the four corners achieve rapid and accurate positioning by precisely matching the positioning structure of the tokamak vacuum chamber 5, ensuring the function of the flange interface, enhancing the structural stability under working conditions, and adapting to the repetitive assembly requirements of maintenance scenarios, thus providing a basic guarantee for the reliable performance of the overall function of the blind flange.
[0028] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A multi-directional flange connection extension blind plate, characterized in that, include: A basic blind flange substrate is assembled on the outside of the tokamak vacuum chamber. The basic blind flange substrate has a trapezoidal protrusion on the side facing the vacuum chamber. The trapezoidal protrusion surrounds and forms a sealing groove, which is used to accommodate a sealing ring. The first flange interface is vertically disposed in the middle region of the base blind flange substrate; The second flange interface is arranged side by side with the first flange interface along the length of the base blind plate and is assembled at an angle. The center lines of the first flange interface and the second flange interface are both aligned with the center point of the tokamak device. The third flange interface is inclinedly disposed on the side of the base blind plate substrate away from the second flange interface, and the center line of the third flange interface is tangent to the magnetic shaft.
2. The multi-directional flange connection extension blind plate according to claim 1, characterized in that, The first flange interface is model CF150, the second flange interface and the third flange interface are model CF100, and each of the flange interfaces conforms to the vacuum sealing standard.
3. The multi-directional flange connection extension blind plate according to claim 2, characterized in that, The nominal diameter of the second flange interface is the same as that of the third flange interface, and the nominal diameter of the first flange interface is larger than that of the second flange interface.
4. The multi-directional flange connection extension blind plate according to claim 1, characterized in that, The basic blind flange base and each of the flange interfaces are integrally formed from 316L stainless steel.
5. The multi-directional flange connection extension blind plate according to claim 3, characterized in that, The basic blind plate substrate has positioning pin holes at its four corners, which are adapted to the positioning structure of the tokamak vacuum chamber.