Star simulator window pluggable transfer line assembly device

Abstract

The utility model discloses a kind of star simulator window pluggable transmission pipeline assembly devices, including heat insulation pipe group, transmission component and heat insulation pipe. Heat insulation pipe group includes the window neck pipe of extension setting between cryogenic thermostat and vacuum device, transmission component includes the conveying pipe group of being sleeved in window neck pipe, heat insulation pipe is sleeved in the outer periphery of window neck pipe, and the outer periphery of window neck pipe has radial interval with inner periphery. By adding heat insulation pipe in the outer periphery of window neck pipe, and heat insulation pipe inner periphery and window neck pipe outer periphery between have radial interval, to form double-layer heat insulation structure by window radial pipe and heat insulation pipe, to significantly reduce the risk of heat leakage from the inside of cryogenic thermostat to the inside of window neck pipe when star simulator works, to further reduce the risk of cooling medium in conveying pipe group being heated, so that conveying pipe group can reliably transport cooling medium, reliably cool down the internal related components of star simulator when working.

Description

Technical Field

[0001] This utility model belongs to the field of stellarator technology, specifically relating to a stellarator window pluggable transmission pipeline assembly. Background Technology

[0002] A stellarator is a magnetic confinement fusion experimental device that relies on a strong magnetic field generated by a superconducting magnet to confine plasma. Since the superconducting magnet needs to operate at extremely low temperatures, stellarators are typically equipped with a cryogenic control system to provide and maintain this cryogenic environment. The stellarator also contains a vacuum system to maintain the vacuum conditions required for plasma confinement. The cryogenic control system is housed outside the vacuum system, with a space between them to allow for the transition and isolation of temperature gradients.

[0003] During the operation of a stellarator, a cooling medium (such as liquid helium, helium gas, liquid nitrogen, or 4K supercritical helium) needs to be supplied to the vacuum device via a delivery pipe to maintain the cryogenic conditions of the superconducting magnet and related components (such as cryogenic pump adsorption plates, limiters, and optical protective targets). To allow the delivery pipe to pass through the cryogenic control unit and enter the vacuum device, a window is usually opened on the side wall of the cryogenic control unit, and the cryogenic control unit is connected to the vacuum device through a window neck tube. The delivery pipe passes through the window neck tube to transport the cooling medium from the outside to the inside of the vacuum device.

[0004] However, in existing technologies, when a stellarator delivers cooling medium to the interior of a vacuum device through a delivery tube, it only insulates the delivery tube with heat through a window neck tube, which serves both as a structural connection and for heat insulation. Because the insulation space between the window neck tube and the delivery tube is limited, and the window neck tube wall itself forms a heat conduction path, heat can be conducted through the window neck tube wall to the interior of the delivery tube, resulting in poor insulation of the delivery tube. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem in the prior art where stellarators, when delivering cooling medium to the interior of a vacuum device through a gas delivery pipe, only use a window neck tube to insulate the delivery pipe, resulting in poor heat insulation.

[0006] To solve the above-mentioned technical problems, this utility model discloses a stellarator window pluggable transmission pipeline assembly. The stellarator includes a cryogenic constant temperature device and a vacuum device disposed inside the cryogenic constant temperature device. A pair of sidewalls between the cryogenic constant temperature device and the vacuum device are spaced apart from each other, and a window is opened on the sidewall of the cryogenic constant temperature device.

[0007] The pluggable transmission line assembly includes an insulated tubing group, a transmission component, and an insulated tubing.

[0008] Specifically, the heat insulation tube assembly includes a window neck tube extending between the low-temperature thermostat and the vacuum device. One end of the window neck tube is fixed to the side wall of the low-temperature thermostat and the vacuum device and aligned with the window, and the other end is fixed to the corresponding side wall of the vacuum device. The transmission assembly includes a conveying tube assembly sleeved in the window neck tube. One end of the conveying tube assembly passes through the window and extends to the outside of the low-temperature thermostat, and the other end passes through the side wall of the vacuum device and extends into the interior of the vacuum device.

[0009] Furthermore, the heat insulation tube is sleeved on the outer periphery of the window neck tube, and the inner periphery is radially spaced from the outer periphery of the window neck tube. One end of the heat insulation tube is fixedly installed on one side wall of the low temperature constant temperature device, and the other end is fixedly installed on the corresponding side wall of the vacuum device.

[0010] By adopting the above technical solution, a double-layer thermal insulation structure is formed by adding a heat insulation tube to the outer periphery of the window neck tube, with a radial gap between the inner periphery of the heat insulation tube and the outer periphery of the window neck tube. The window neck tube provides the first layer of thermal insulation to the delivery tube assembly, and the radial gap between the heat insulation tube and the window neck tube forms a second layer of thermal insulation space. This thermal insulation space and the heat insulation tube can block the heat conduction path to the window neck tube, thereby significantly reducing the risk of heat leakage from the temperature rise inside the cryogenic constant temperature device to the inside of the window neck tube when the stellarator is working. This reduces the risk of the cooling medium inside the delivery tube assembly being heated, enabling the delivery tube assembly to reliably deliver the cooling medium and reliably cool and reduce the temperature of relevant internal components (such as the cryogenic pump adsorption plate, limiter, optical protection target, etc.) of the stellarator during operation.

[0011] Therefore, compared to the existing technology that only uses a single layer of insulation through the window neck tube, the double-layer insulation structure of this application significantly improves the insulation effect on the delivery tube assembly, which helps to improve the cooling efficiency and operational stability of the stellarator during operation. Furthermore, the delivery tube assembly is fitted inside the window neck tube, with one end extending to the outside of the cryogenic control device and the other end extending into the vacuum device. While achieving the transfer of the cooling medium, the insulation tube and the window neck tube form a double thermal barrier for the delivery tube assembly, reducing heat exchange between the cooling medium inside the delivery tube assembly and the external environment, further ensuring the cooling efficiency and operational stability of the stellarator during operation.

[0012] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein an annular fixing seat is provided on the outer peripheral wall of one end of the window neck tube, and the annular fixing seat is fixed to the inner wall of the low temperature constant temperature device; one end of the heat insulation tube is fixed to the inner side of the annular fixing seat, and the other end is fixedly installed on the inner wall of the corresponding side of the vacuum device.

[0013] By adopting the above technical solution, an annular fixing seat is set on the outer peripheral wall of one end of the window neck tube. The annular fixing seat fixes one end of the window neck tube to the inner wall of the low temperature constant temperature device. The annular fixing seat provides a reliable axial and radial positioning base for the window neck tube, ensuring the alignment accuracy between the window neck tube and the window.

[0014] Furthermore, the inner fixing method of the annular mounting bracket brings the insulation tube closer to the window neck tube, shortening the installation path of the insulation tube and facilitating assembly and subsequent maintenance. In addition, the annular mounting bracket unifies the fixing points of the window neck tube and the insulation tube onto the annular mounting bracket, reducing the number of independent fixing structures and simplifying the overall assembly complexity. At the same time, the annular mounting bracket itself also provides structural reinforcement to the connection area between the window neck tube and the side wall of the low-temperature constant temperature device, improving the structural strength and sealing of the connection.

[0015] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein a telescopic part is provided in the middle of the window neck tube, and the radial dimension of the telescopic part is larger than the radial dimensions of both ends of the window neck tube; and the heat insulation tube includes a first heat insulation tube body that is sleeved on the outer periphery of the telescopic part near the low temperature constant temperature device, and a second heat insulation tube body that is sleeved on the outer periphery of the telescopic part near the vacuum device.

[0016] The radial dimension of the first heat insulation tube is larger than that of the second heat insulation tube, and the ends of the first heat insulation tube and the second heat insulation tube are sleeved together. Furthermore, along the axial direction of the window neck tube, a plurality of fasteners are sequentially arranged on the outer peripheral wall of the second heat insulation tube, and a connecting protrusion corresponding to each of the fasteners is provided on the outer peripheral surface of the window neck tube. The top of each connecting protrusion abuts against the inner wall surface of the second heat insulation tube, and each fastener passes through the tube wall of the second heat insulation tube and is fixedly connected to the corresponding connecting protrusion.

[0017] The above technical solution is adopted, and the telescopic part is set in the middle of the window neck tube and its radial dimension is larger than that of both ends. It provides axial expansion and contraction compensation for the window neck tube, and can absorb the side wall expansion and deformation caused by the temperature rise of the vacuum device, as well as the side wall expansion and deformation caused by the temperature rise of the low temperature constant temperature device. It prevents the window neck tube from being damaged by excessive stress due to thermal expansion or the failure of the connection due to the temperature rise of the vacuum device.

[0018] Furthermore, the insulation tube is divided into two parts: a first insulation tube body and a second insulation tube body. The first insulation tube body is fitted around the outer circumference of the telescopic part and has a larger radial dimension, while the second insulation tube body has a smaller radial dimension. This segmented design, where the first and second insulation tube bodies are fitted together, facilitates separate processing and assembly, reducing manufacturing difficulty. Moreover, the second insulation tube body is fixedly connected to a connecting protrusion on the outer circumference of the window neck tube using fasteners. The top of the connecting protrusion abuts against the inner wall of the second insulation tube body, reliably constraining the relative position between the second insulation tube body and the window neck tube. This ensures that the radial distance between them remains stable during assembly and use, preventing displacement of the second insulation tube body due to vibration or temperature changes, which would affect the insulation effect.

[0019] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein the telescopic part includes a plurality of corrugated tubes arranged sequentially along the axial direction of the window neck tube in the middle of the window neck tube and spaced apart from each other, and each corrugated tube and both ends of the window neck tube are rigid tubes.

[0020] Furthermore, the ends where the first and second insulation tubes are connected to each other are provided with flexible connectors, which are arranged around the circumference of the window neck tube on the inner periphery of the connection part.

[0021] The above technical solution utilizes a telescopic section composed of multiple corrugated tubes arranged at intervals. These corrugated tubes can freely expand, contract, and bend along the axial direction, providing flexible compensation for the window neck tube. This effectively absorbs sidewall expansion deformation caused by temperature increases in the vacuum device, as well as vibration displacement generated during device operation. Furthermore, it compensates for installation errors between the other end of the window tube and the cryogenic constant temperature device. Moreover, the corrugated tubes and both ends of the window neck tube are made of rigid tubes, ensuring the structural strength and rigidity of the window neck tube at the end connections.

[0022] Furthermore, the structure of multiple corrugated pipes arranged at intervals makes the flexible compensation capability of the expansion joint more evenly distributed along the axial direction, avoiding fatigue failure of a single corrugated pipe section due to excessive deformation and extending the service life of the window neck.

[0023] In addition, the flexible connector at the joint between the first and second insulated tubes is arranged circumferentially around the window neck tube on the inner circumference of the joint, forming a flexible transition between the two sections of the insulated tubes. On the one hand, the flexible connector allows relative displacement between the two sections of the insulated tubes, thereby accommodating the expansion and deformation of the sidewall caused by the temperature rise of the vacuum device. On the other hand, it can also accommodate the expansion and deformation of the sidewall of the low-temperature constant temperature device, reducing the risk of bending failure of the first and second insulated tubes.

[0024] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly device, wherein a first heat insulation tube body has an annular limiting portion extending radially inward at one end near the second heat insulation tube body, and a corresponding second heat insulation tube body has an annular limited portion extending radially outward at one end, and the ends of the first heat insulation tube body and the second heat insulation tube body that are sleeved on each other are connected to each other through the annular limiting portion and the annular limited portion.

[0025] Among them, the flexible connector consists of multiple spring pieces evenly spaced along the circumference of the window neck tube. Each spring piece extends along the axial direction of the window neck tube, with one end fixedly connected to the inner wall surface of the first heat insulation tube body and the other end fixedly connected to the inner wall surface of the annular limiting part.

[0026] Furthermore, the annular limiting part is sleeved on the inner side of the annular limiting part, and in the axial direction of the window neck tube, the annular limiting part and the annular limiting part have a first gap between each other, and in the radial direction of the window neck tube, the annular limiting part has a second gap between the inner wall surface of the first heat insulation tube body.

[0027] Using the above technical solution, the annular limiting part and the annular limited part cooperate to achieve radial positioning of the sleeve ends of the first and second heat insulation tubes, preventing misalignment or detachment of the two heat insulation tubes in the radial and axial directions. Furthermore, the first gap allows relative axial displacement between the annular limiting part and the annular limited part, and the second gap allows relative radial displacement between the annular limited part and the inner wall of the first heat insulation tube. These two gaps together provide compensation space for the thermal expansion deformation of the two heat insulation tubes caused by the sidewalls of the vacuum device and for the device under vibration conditions, avoiding the risk of heat insulation tube rupture due to excessive stress caused by restricted deformation.

[0028] Furthermore, the spring extends axially along the window neck tube, with one end fixed to the inner wall of the first heat insulation tube and the other end fixed to the inner wall of the annular limiting part. The elastic deformation capability of the spring allows the first heat insulation tube and the second heat insulation tube to maintain a flexible connection. The uniform arrangement of the springs ensures the consistency of the flexible connection in all directions around the circumference. Moreover, since the spring itself has elasticity, it can resist the thermal expansion deformation of the side wall caused by the increase of the internal temperature of the vacuum device, reduce the deformation of the side wall of the vacuum device, and enable the vacuum device to operate reliably.

[0029] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein one end of the window neck tube is provided with an extension tube, which extends axially from one end of the window neck tube through the window to the outside of the cryogenic constant temperature device.

[0030] The transmission assembly also includes a first sealing member covering the opening on the outside of the extension tube body, and a matching second sealing member covering the opening at the other end of the window neck tube, with one end of the transmission tube assembly extending through the first sealing member to the outside of the extension tube body and the other end extending through the second sealing member to the inside of the vacuum device.

[0031] Using the above technical solution, the extension tube extends from one end of the window neck tube through the window to the outside of the cryogenic constant temperature device, providing a channel for the delivery tube assembly to enter the vacuum device from the outside, allowing the delivery tube assembly to connect to the cooling medium source from outside the cryogenic constant temperature device. In addition, a first sealing component covers the opening on the outside of the extension tube, and a second sealing component covers the opening at the other end of the window neck tube, sealing both ends of the window neck tube respectively. This ensures airtight isolation between the inside of the window neck tube and the external environment, preventing external heat or gas from entering the window neck tube through the opening and affecting the insulation effect of the delivery tube assembly. Furthermore, the delivery tube assembly extends through the first and second sealing components to the outside of the extension tube and the inside of the vacuum device. The sealing components serve both a sealing function and a radial support and positioning function for the delivery tube assembly, keeping the delivery tube assembly in a centered position inside the window neck tube, which helps maintain a uniform insulation gap between the delivery tube assembly and the window neck tube. This structural design allows the delivery tube assembly to be inserted or removed from the outside through the extension tube, enabling a pluggable maintenance method, facilitating inspection or replacement of the delivery tube assembly without shutting down the system or with partial disassembly.

[0032] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein the first sealing component is configured as a sealing flange, the second sealing component is configured as a heat insulation cover plate, and a connecting flange is fixedly ringed on the outer peripheral wall of the other end of the extension tube.

[0033] The sealing flange is attached to the corresponding side wall of the connecting flange on the side of the extension pipe. Multiple fasteners are arranged sequentially and spaced apart along the circumference of the connecting flange. Each fastener passes through the connecting flange and the sealing flange sequentially along the axial direction of the extension pipe to detachably and fix them together. In addition, the heat insulation cover is fixedly installed on the opening at the other end of the window neck tube.

[0034] Using the above technical solution, the sealing flange, as the first sealing component, is detachably connected to the connecting flange via fasteners. This allows for easy disassembly and installation of the first sealing component, facilitating the insertion and removal of the delivery pipe assembly and routine maintenance. Repeated assembly and disassembly of the sealing structure can be achieved without destructive disassembly. Additionally, a heat-insulating cover plate, as the second sealing component, is fixedly installed on the opening at the other end of the window neck tube. The heat-insulating cover plate itself has heat-insulating properties, further blocking heat conduction from the end of the window neck tube to the interior of the vacuum device while sealing, thus enhancing the end insulation effect. Furthermore, the connecting flange fixing ring is located on the outer peripheral wall of the extension tube, providing a reliable contact surface and connection base for the sealing flange. Multiple fasteners spaced circumferentially ensure a uniform distribution of the clamping force between the sealing flange and the connecting flange, guaranteeing reliable sealing between their contact surfaces. The detachable connection between the sealing flange and the connecting flange also allows for easy removal of the sealing flange simply by loosening the fasteners when replacing the delivery pipe assembly.

[0035] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly device, wherein a connecting sleeve with open ends is provided on the side of the connecting flange away from the extension pipe body. The connecting sleeve is sleeved on the outer periphery of the part of the transmission pipe assembly that extends outside the extension pipe body, one end is detachably fixedly connected to the outside of the connecting flange, and the other end extends outward along its axial direction away from the extension pipe body and is detachably covered with a cover plate flange.

[0036] Furthermore, a sleeve is fitted around the outer periphery of the conveying pipe assembly. In the radial direction of the conveying pipe assembly, the inner periphery of the sleeve is spaced apart from the outer periphery of the conveying pipe assembly. One end of the sleeve extends through the cover flange and the other end extends to the inner side of the heat insulation cover. One end of the conveying pipe assembly passes through the connecting flange and its outer peripheral wall is fixedly connected to the connecting flange.

[0037] Furthermore, a third corrugated tube body is formed on the sleeve, and the third corrugated tube body is located within the range of the window neck tube along the axial direction of the window neck tube.

[0038] Using the above technical solution, the connecting sleeve is fitted around the outer periphery of the portion of the conveying pipe assembly that extends beyond the extension pipe body. One end is detachably connected to the connecting flange, and the other end is covered by a cover flange. The connecting sleeve forms an additional sealing cavity outside the extension pipe body, providing protection and secondary sealing for the exposed portion of the conveying pipe assembly, reducing the risk of heat leakage in this part. In addition, the sleeve is fitted around the outer periphery of the conveying pipe assembly and has a radial gap between it and the conveying pipe assembly. One end of the sleeve passes through the cover flange, and the other end extends to the inside of the heat insulation cover plate. The sleeve forms a continuous heat insulation barrier around the outer periphery of the conveying pipe assembly, separating the conveying pipe assembly from the internal space of the window neck tube. The radial gap between the sleeve and the conveying pipe assembly further constitutes a heat insulation space, achieving multi-layer heat insulation protection for the conveying pipe assembly. In addition, the third corrugated tube formed on the sleeve is located within the window neck tube range, providing the sleeve with axial expansion and contraction compensation capability, enabling the sleeve to adapt to axial deformation caused by temperature changes, avoiding excessive stress on the sleeve due to the expansion and compression of the side wall of the vacuum device, which could cause deformation or connection failure, and ensuring that the sleeve always maintains complete coverage and heat insulation function for the delivery pipe assembly under various temperature conditions.

[0039] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly. The transmission assembly further includes a sealing ring and an isolation sleeve fixedly sleeved on the other end of the transmission pipe assembly. The transmission pipe assembly includes a plurality of cooling pipes arranged radially spaced apart from each other on the sleeve. One end of the isolation sleeve is fixedly connected to the transmission pipe assembly, and the other end is spaced apart from the other end of the sleeve. The sealing ring is fixedly embedded between the other end of the isolation sleeve and the other end of the sleeve.

[0040] One end of each cooling pipe passes through the cover flange, and the outer peripheral wall of the cooling pipe is fixedly connected to the cover flange. The other end passes through the isolation sleeve and extends into the interior of the vacuum device. Furthermore, the outer periphery of each cooling pipe is covered with a heat insulation layer.

[0041] Using the above technical solution, the sealing ring is embedded between the isolation sleeve and the sleeve, forming a sealed transition at the interval between them. This ensures the sealing integrity of the internal space of the sleeve and prevents external gas or heat from entering through the gap between the sleeve and the isolation sleeve. Furthermore, the isolation sleeve is fixedly fitted onto the other end of the delivery pipe assembly, bundling and fixing the ends of multiple cooling pipes together. This ensures that the cooling pipes maintain a stable relative position when inserted into the vacuum device, preventing collisions or friction between them. In addition, the delivery pipe assembly consists of multiple cooling pipes spaced apart from each other, enabling the delivery of different types of cooling media or achieving multi-channel parallel delivery, thus improving the flexibility of the delivery pipe assembly's layout and its delivery capacity.

[0042] Furthermore, the insulation layer covering the outer periphery of each cooling pipe directly reduces the heat exchange between the low-temperature medium inside the cooling pipe and the internal space of the sleeve. Combined with the multi-layer insulation structure of the sleeve and the window neck, a multi-layer thermal barrier system is formed from the inside out, further reducing overall heat leakage.

[0043] Furthermore, the present invention also discloses a stellarator window pluggable transmission pipeline assembly, wherein the transmission component further includes a first heat-insulating cold screen and a second heat-insulating cold screen located inside the sleeve.

[0044] The first heat insulation cold shield is arranged around the outer periphery of the conveying pipe assembly and is spaced apart from the conveying pipe assembly in the radial direction of the sleeve. One end of the first heat insulation cold shield is fixedly connected to the cover plate flange, and the other end passes through the isolation sleeve and the side wall of the vacuum device and extends into the vacuum device. The first heat insulation cold shield is fixedly connected to the isolation sleeve.

[0045] The second heat insulation cold shield ring is located on the outer periphery of the first heat insulation cold shield and is spaced apart from the first heat insulation cold shield ring in the radial direction of the sleeve. One end of the second heat insulation cold shield is fixedly connected to the cover plate flange, and the other end passes through the isolation sleeve and the side wall of the vacuum device and extends into the vacuum device. The second heat insulation cold shield is fixedly connected to the isolation sleeve.

[0046] Using the above technical solution, the first and second thermal insulation cold shields are sequentially fitted inside the sleeve around the outer periphery of the conveying pipe assembly, forming a double-layer thermal insulation barrier to further enhance the thermal insulation effect on the conveying pipe assembly. The gap between the two layers of cold shields further blocks the heat transfer path, creating a multi-level thermal insulation barrier inside the sleeve, extending from the conveying pipe assembly to the sleeve wall. Furthermore, both the first and second thermal insulation cold shields penetrate the isolation sleeve and the side wall of the vacuum device, extending into the vacuum device. This ensures that the insulation range of the cold shields covers the entire path from the cover flange to the interior of the vacuum device, providing thermal insulation protection along the entire length of the conveying pipe assembly and preventing localized areas of weak insulation. Attached Figure Description

[0047] Figure 1 A schematic diagram of the overall structure of the pluggable transmission pipeline assembly provided in an embodiment of this utility model;

[0048] Figure 2 This is a cross-sectional view of the heat insulation pipe assembly and the heat insulation pipe provided in the embodiment of this utility model.

[0049] Figure 3 This is a partial schematic diagram showing the connection between the second heat insulation tube and the window neck tube provided in this embodiment of the utility model.

[0050] Figure 4 This is a schematic diagram of the overall structure of the heat insulation pipe provided in an embodiment of the present utility model;

[0051] Figure 5 This is a schematic diagram of the overall structure of the transmission component provided in an embodiment of the present utility model;

[0052] Figure 6 A partial structural schematic diagram of the transmission component provided in an embodiment of this utility model;

[0053] Figure 7 This is a schematic diagram of the structure of the heat insulation cover plate provided in an embodiment of the present utility model;

[0054] Figure 8 This is a side view of the transmission component near the vacuum device provided in an embodiment of the present invention.

[0055] Figure 9 This is a schematic diagram of the internal structure connection of the transmission component near the vacuum device provided in an embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 10. Pluggable transmission line assembly;

[0058] 100. Insulated pipe assembly; 101. Window neck tube; 102. Annular fixing seat; 103. Expansion joint; 104. Corrugated pipe body; 105. Extension pipe body; 106. Connecting flange; 107. Fastener;

[0059] 200. Transmission assembly; 201. Conveying pipe assembly; 202. Sealing flange; 203. Insulation cover plate; 204. Connecting cylinder; 205. Cover plate flange; 206. Sleeve; 207. Third corrugated pipe body; 208. Sealing ring; 209. Isolation sleeve; 210. Cooling pipe; 211. Insulation layer; 212. First insulation cold shield; 213. Second insulation cold shield;

[0060] 300, heat insulation pipe; 301, first heat insulation pipe body; 302, second heat insulation pipe body; 303, fastener; 304, connecting protrusion; 305, flexible connector; 306, spring; 307, annular limiting part; 308, annular limited part. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0062] First, the overall structure of the stellarator used in this pluggable transmission pipeline assembly is described. The stellarator includes a cryogenic device and a vacuum device located inside the cryogenic device. The cryogenic device provides and maintains the cryogenic environment required for the superconducting magnet, and its sidewall has a window serving as a channel for the cooling medium transmission pipeline to enter and exit the cryogenic device. The vacuum device, located inside the cryogenic device, maintains the vacuum conditions required for plasma confinement. A pair of sidewalls between the cryogenic device and the vacuum device are spaced apart from each other, with the space between them used to achieve a temperature gradient transition. The pluggable transmission pipeline assembly is located at this window, connecting the outside of the cryogenic device and the inside of the vacuum device to achieve the transmission of the cooling medium and multi-layer insulation.

[0063] This embodiment provides a stellarator window pluggable transmission pipeline assembly 10, such as Figure 1 and Figure 2 As shown, the pluggable transmission line assembly 10 includes an insulated tube group 100, a transmission component 200, and an insulated tube 300.

[0064] Specifically, the heat insulation tube assembly 100 includes a window neck tube 101 extending between the low-temperature thermostat and the vacuum device. One end of the window neck tube 101 is fixed to the side wall of the low-temperature thermostat and the vacuum device and aligned with the window, and the other end is fixed to the corresponding side wall of the vacuum device. The transmission assembly 200 includes a transmission tube assembly 201 sleeved in the window neck tube 101. One end of the transmission tube assembly 201 extends through the window to the outside of the low-temperature thermostat, and the other end extends through the side wall of the vacuum device into the interior of the vacuum device.

[0065] Furthermore, the heat insulation tube 300 is sleeved on the outer periphery of the window neck tube 101, and the inner periphery is radially spaced from the outer periphery of the window neck tube 101. Additionally, one end of the heat insulation tube 300 is fixedly installed on one side wall of the low temperature constant temperature device, and the other end is fixedly installed on the corresponding side wall of the vacuum device.

[0066] The cryogenic control unit is the external cryogenic container of the stellarator, used to maintain a low-temperature environment inside. The vacuum unit is the internal vacuum container of the stellarator, used to maintain the vacuum conditions required for plasma confinement. The window neck tube 101 is a tubular structure connecting the cryogenic control unit and the vacuum unit, providing a passage for the delivery tube assembly 201 to pass through the window, and also serving as the first layer of thermal insulation. The delivery tube assembly 201 is a piping assembly for transporting cooling media, fitted inside the window neck tube 101. The thermal insulation tube 300 is a tubular structure fitted around the outer periphery of the window neck tube 101, radially spaced from the outer periphery, serving as the second layer of thermal insulation. The radial gap between the thermal insulation tube 300 and the window neck tube 101 forms an insulating space, which can block the heat conduction path.

[0067] Specifically, the cooling medium is transported from the outside of the cryogenic constant temperature device to the inside of the vacuum device through the transport pipe assembly 201. During the transport process, the cryogenic medium inside the transport pipe assembly 201 exchanges heat with the external environment. The window neck tube 101 forms the first layer of thermal insulation barrier for the transport pipe assembly 201. The thermal insulation tube 300 is sleeved on the outer periphery of the window neck tube 101 and has a radial gap between it and the window neck tube 101. This radial gap forms the second layer of thermal insulation space. Heat from the external environment must pass through the thermal insulation tube 300, the radial gap thermal insulation space, and the window neck tube 101 in sequence to reach the transport pipe assembly 201. Compared with the existing technology that only uses the window neck tube 101 for single-layer thermal insulation, the double-layer thermal insulation structure of this application significantly extends the heat conduction path and increases the thermal resistance, significantly reducing heat leakage, thereby solving the technical problem of poor thermal insulation effect. At the same time, the design of the transport pipe assembly 201 being sleeved inside the window neck tube 101 allows the transport pipe assembly 201 to be inserted or removed through the window, realizing a pluggable maintenance method.

[0068] This application does not limit the specific connection method between the window neck tube 101 and the sidewalls of the cryogenic constant temperature device and the vacuum device. For example, in one embodiment, both ends of the window neck tube 101 are fixed to the sidewalls of the cryogenic constant temperature device and the vacuum device respectively by welding. The welded connection has the characteristics of compact structure and good sealing performance. In another embodiment, both ends of the window neck tube 101 are fixed to the sidewalls of the cryogenic constant temperature device and the vacuum device respectively by flanges and bolts. The flange connection facilitates disassembly and installation and is beneficial for later maintenance. In yet another embodiment, one end of the window neck tube 101 is fixed by welding and the other end is fixed by a flange, which takes into account both sealing and maintainability.

[0069] Based on the above-mentioned stellarator window pluggable transmission pipeline assembly 10 provided in this application, such as Figure 2 As shown, an annular fixing seat 102 is provided on the outer peripheral wall of one end of the window neck tube 101, and the annular fixing seat 102 is fixed to the inner wall of the low temperature constant temperature device; one end of the heat insulation tube 300 is fixed to the inner side of the annular fixing seat 102, and the other end is fixedly installed on the inner wall of the corresponding side of the vacuum device.

[0070] Specifically, by setting an annular fixing seat 102 on the outer peripheral wall of one end of the window neck tube 101, one end of the window neck tube 101 is fixed to the inner wall of the low temperature constant temperature device by the annular fixing seat 102. The annular fixing seat 102 provides a reliable axial and radial positioning base for the window neck tube 101, ensuring the alignment accuracy between the window neck tube 101 and the window.

[0071] Furthermore, the inner fixing method of the annular fixing seat 102 brings the insulation tube 300 closer to the window neck tube 101, shortening the installation path of the insulation tube 300 and facilitating assembly and subsequent maintenance. Moreover, the annular fixing seat 102 unifies the fixing points of the window neck tube 101 and the insulation tube 300 onto the annular fixing seat 102, reducing the number of independent fixing structures and simplifying the overall assembly complexity. Simultaneously, the annular fixing seat 102 itself also provides structural reinforcement to the connection area between the window neck tube 101 and the side wall of the low-temperature constant temperature device, improving the structural strength and sealing of the connection.

[0072] More specifically, this application does not limit the specific structure and arrangement of the annular fixing seat 102. For example, in one embodiment, the annular fixing seat 102 is an annular flange, which is fixed to the inner wall of the low-temperature constant temperature device by welding. In another embodiment, the annular fixing seat 102 is an annular connecting plate integrally formed with the window neck tube 101. The annular connecting plate and the window neck tube 101 are integrally formed by integral casting process, which reduces the number of parts and assembly steps and improves the overall structural integrity.

[0073] Based on the above-mentioned stellarator window pluggable transmission pipeline assembly 10 provided in this application, such as Figure 1 and Figure 2 As shown, a telescopic part 103 is provided in the middle of the window neck tube 101. The radial dimension of the telescopic part 103 is larger than the radial dimensions of both ends of the window neck tube 101, thereby providing axial expansion and contraction compensation capability for the window neck tube 101. It can absorb the side wall expansion and deformation caused by the temperature rise of the vacuum device and the side wall expansion and deformation caused by the temperature rise of the low temperature constant temperature device, and prevent the window neck tube 101 from being damaged by excessive stress bending or failure at the connection due to thermal expansion under the condition of increased temperature of the vacuum device.

[0074] And, as Figure 2 and Figure 3 As shown, the heat insulation tube 300 includes a first heat insulation tube body 301 near the low-temperature constant temperature device and sleeved on the outer periphery of the telescopic part 103, and a second heat insulation tube body 302 near the vacuum device. The radial dimension of the first heat insulation tube body 301 is larger than that of the second heat insulation tube body 302, and the ends of the first heat insulation tube body 301 and the second heat insulation tube body 302 are sleeved together. Along the axial direction of the window neck tube 101, a plurality of fasteners 303 are sequentially provided on the outer peripheral wall of the second heat insulation tube body 302, such as 2, 3, 5, etc. The outer peripheral surface of the window neck tube 101 is provided with connecting protrusions 304 corresponding to the plurality of fasteners 303, and the top of each connecting protrusion 304 abuts against the inner wall surface of the second heat insulation tube body 302. Each fastener 303 passes through the tube wall of the second heat insulation tube body 302 and is fixedly connected to the corresponding connecting protrusion 304.

[0075] Specifically, the heat insulation tube 300 is divided into two parts: a first heat insulation tube body 301 and a second heat insulation tube body 302. The first heat insulation tube body 301 is fitted around the outer periphery of the telescopic part 103 and has a larger radial dimension, while the second heat insulation tube body 302 has a smaller radial dimension. This segmented design, in which the first heat insulation tube body 301 and the second heat insulation tube body 302 are fitted together, facilitates separate processing and assembly, reducing manufacturing difficulty. Furthermore, the second heat insulation tube body 302 is fixedly connected to the connecting protrusion 304 on the outer periphery of the window neck tube 101 by fasteners 303. The top of the connecting protrusion 304 abuts against the inner wall of the second heat insulation tube body 302, so that the relative position between the second heat insulation tube body 302 and the window neck tube 101 is reliably constrained, ensuring that the radial distance between the two remains stable during assembly and use, and preventing the second heat insulation tube body 302 from shifting due to vibration or temperature changes, thus affecting the heat insulation effect.

[0076] More specifically, the specific structure and arrangement of the fastener 303 and the connecting protrusion 304 are not limited. For example, in one embodiment, the fastener 303 is a bolt, and the connecting protrusion 304 is a threaded boss provided on the outer peripheral surface of the window neck tube 101. The bolt passes through the wall of the second heat insulation tube 302 and is screwed into the threaded boss to achieve a fixed connection. In another embodiment, the fastener 303 is a screw, and the connecting protrusion 304 is a protrusion with a threaded hole provided on the outer peripheral surface of the window neck tube 101. The screw passes through the wall of the second heat insulation tube 302 and is screwed into the threaded hole of the protrusion to achieve a fixed connection. In yet another embodiment, the fastener 303 is a pin, and the connecting protrusion 304 is a lug structure with a pin hole. The pin passes through the wall of the second heat insulation tube 302 and the pin hole of the lug to achieve a fixed connection.

[0077] More specifically, the structure and arrangement of the telescopic part 103 are not limited, and the following is an example.

[0078] In one implementation, such as Figure 2 As shown, the telescopic part 103 includes a plurality of corrugated tubes 104 arranged sequentially along the axial direction of the window neck tube 101 in the middle of the window neck tube 101 and spaced apart from each other, such as 2, 3, 4, etc., and each corrugated tube 104 and both ends of the window neck tube 101 are rigid tubes.

[0079] Specifically, the telescopic section 103 is composed of multiple corrugated pipe bodies 104 arranged at intervals. The corrugated pipe bodies 104 can freely expand, contract, and bend along the axial direction, providing flexible compensation for the window neck tube 101. On the one hand, it can effectively absorb the sidewall expansion deformation caused by the temperature rise of the vacuum device and the vibration displacement generated during the operation of the device. On the other hand, it can compensate for the installation error between the other end of the window diameter tube and the low-temperature constant temperature device. Furthermore, the corrugated pipe bodies 104 and both ends of the window neck tube 101 are made of rigid pipes, thereby ensuring the structural strength and rigidity of the window neck tube 101 at the end connection.

[0080] In addition, the structure of multiple corrugated pipe bodies 104 arranged at intervals makes the flexible compensation capability of the expansion joint 103 more evenly distributed along the axial direction, avoiding fatigue failure of a single corrugated pipe section due to excessive deformation, and extending the service life of the window neck 101.

[0081] More specifically, the specific structure and material of the corrugated pipe body 104 are not limited. For example, in one embodiment, the corrugated pipe body 104 is a stainless steel metal corrugated pipe, made of austenitic stainless steel, which has good low-temperature resistance and fatigue life, and is suitable for repeated expansion and contraction deformation under low-temperature conditions. In another embodiment, the corrugated pipe body 104 is a composite material corrugated pipe, such as a rubber corrugated pipe, which has the advantage of good thermal insulation performance.

[0082] More specifically, such as Figure 2 and Figure 4 As shown, a flexible connector 305 is provided at the end where the first heat insulation tube 301 and the second heat insulation tube 302 are sleeved together. The flexible connector 305 is arranged circumferentially around the window neck tube 101 on the inner circumference of the sleeved part. This forms a flexible transition between the two heat insulation tubes 300. On the one hand, the flexible connector 305 allows relative displacement between the two heat insulation tubes 300, thereby accommodating the expansion and deformation of the sidewall caused by the temperature rise of the vacuum device. On the other hand, it can also accommodate the expansion and deformation of the sidewall of the low-temperature constant temperature device, reducing the risk of bending failure of the first heat insulation tube 301 and the second heat insulation tube 302.

[0083] More specifically, the specific structure and material of the flexible connector 305 are not limited. For example, in one embodiment, the flexible connector 305 is a silicone sealing sleeve, which is fitted onto the inner circumference of the fitting portion, utilizing the elasticity and low-temperature resistance of silicone to achieve a flexible sealing transition. In another embodiment, the flexible connector 305 is a plurality of copper braids evenly spaced along the circumference of the window neck tube 101. One end of each copper braid is fixedly connected to one end of the first heat insulation tube 301, and the other end is fixedly connected to one end of the second heat insulation tube 302. The copper braids serve to conduct heat between the first heat insulation tube 301 and the second heat insulation tube 302, avoiding the risk of localized heating caused by heat accumulation on a single heat insulation tube 300.

[0084] Furthermore, to ensure that the positions of the first heat insulation tube 301 and the second heat insulation tube 302 do not shift when subjected to force, in one embodiment, such as... Figure 4As shown, the first heat insulation tube 301 has an annular limiting portion 307 extending radially inward at one end near the second heat insulation tube 302, and the corresponding end of the second heat insulation tube 302 has an annular limited portion 308 extending radially outward. The ends of the first heat insulation tube 301 and the second heat insulation tube 302 that are sleeved on each other are connected to each other through the annular limiting portion 307 and the annular limited portion 308.

[0085] Furthermore, the annular limiting part 308 is sleeved inside the annular limiting part 307, and in the axial direction of the window neck tube 101, the annular limiting part 307 and the annular limiting part 308 have a first gap between each other, and in the radial direction of the window neck tube 101, the annular limiting part 308 has a second gap with the inner wall surface of the first heat insulation tube 301.

[0086] Specifically, the annular limiting part 307 and the annular limited part 308 cooperate to achieve radial positioning of the sleeve ends of the first heat insulation tube 301 and the second heat insulation tube 302, preventing the two heat insulation tubes 300 from misaligning or coming off radially and axially. In addition, the first gap allows the annular limiting part 307 and the annular limited part 308 to have relative displacement in the axial direction, and the second gap allows the annular limited part 308 to have relative displacement in the radial direction with the inner wall surface of the first heat insulation tube 301. The two gaps together provide compensation space for the thermal expansion deformation of the two heat insulation tubes 300 due to the side wall of the vacuum device and for the device under vibration conditions, avoiding the risk of the heat insulation tubes 300 breaking due to excessive stress caused by restricted deformation.

[0087] Alternatively, the flexible connector 305 can be a plurality of spring pieces 306 evenly spaced along the circumference of the window neck tube 101. Each spring piece 306 extends axially along the window neck tube 101, with one end fixedly connected to the inner wall surface of the first heat insulation tube body 301 and the other end fixedly connected to the inner wall surface of the annular limiting part 308.

[0088] Specifically, the elastic deformation capability of the spring sheet 306 enables the first heat insulation tube 301 and the second heat insulation tube 302 to maintain a flexible connection. The uniform arrangement of the spring sheets 306 ensures the consistency of the flexible connection in all directions around the circumference. Furthermore, since the spring sheet 306 itself has elasticity, it can resist the thermal expansion deformation of the side wall caused by the increase in the internal temperature of the vacuum device, reduce the deformation of the side wall of the vacuum device, and enable the vacuum device to operate reliably.

[0089] Furthermore, in one implementation, such as Figure 1As shown, to facilitate the installation of the delivery pipe assembly 201, an extension pipe body 105 is also provided at one end of the window neck tube 101. The extension pipe body 105 extends axially from one end of the window neck tube 101 through the window to the outside of the low temperature constant temperature device; thereby providing a channel for the delivery pipe assembly 201 to enter the vacuum device from the outside, so that the delivery pipe assembly 201 can be connected to the cooling medium source from the outside of the low temperature constant temperature device.

[0090] In addition, the transmission assembly 200 also includes a first sealing member covering the opening on the outside of the extension tube 105, and a matching second sealing member covering the opening at the other end of the window neck tube 101. One end of the transmission tube assembly 201 extends through the first sealing member to the outside of the extension tube 105, and the other end extends through the second sealing member to the inside of the vacuum device.

[0091] Specifically, the first sealing component covers the outer opening of the extension tube 105, and the second sealing component covers the other end opening of the window neck tube 101, sealing both ends of the window neck tube 101 respectively. This ensures airtight isolation between the inside of the window neck tube 101 and the external environment, preventing external heat or gas from entering the window neck tube 101 through the opening and affecting the heat insulation effect of the delivery tube assembly 201. Furthermore, the delivery tube assembly 201 extends through the first and second sealing components to the outside of the extension tube 105 and the inside of the vacuum device. The sealing components not only provide a seal but also offer radial support and positioning for the delivery tube assembly 201, keeping it centered inside the window neck tube 101 and helping to maintain a uniform heat insulation gap between the delivery tube assembly 201 and the window neck tube 101. This structural design allows the delivery tube assembly 201 to be inserted or removed from the outside through the extension tube 105, enabling pluggable maintenance and facilitating repair or replacement of the delivery tube assembly 201 without shutting down the system or with partial disassembly.

[0092] More specifically, the extension tube 105 is a tubular structure that extends axially from one end of the window neck tube 101, passes through the window, and extends to the outside of the cryogenic control device, providing an external access channel for the delivery tube assembly 201. The first sealing component is a sealing structure covering the outer opening of the extension tube 105, used to seal the outer opening of the extension tube 105. The second sealing component is a sealing structure covering the opening at the other end of the window neck tube 101, used to seal the inner opening of the window neck tube 101.

[0093] More specifically, this application does not limit the specific structure and arrangement of the extension tube 105. For example, in one embodiment, the extension tube 105 is a straight tube section coaxial with the window neck tube 101, extending axially from one end of the window neck tube 101 through the window to the outside of the low-temperature constant temperature device. The straight tube section has a simple structure and is easy to process. In another embodiment, the extension tube 105 is a bent tube section, extending axially from one end of the window neck tube 101 out of the window and then bending at a certain angle to avoid interference from other external components of the low-temperature constant temperature device and to adapt to complex spatial layouts.

[0094] This application is not limited to the specific structure of the first sealing component and the second sealing component. For example, in one embodiment, such as... Figure 1 and Figure 5 As shown, the first sealing component is a cover flange 205, which is bolted to the outer opening of the extension tube 105, and the flange connection facilitates repeated disassembly and reassembly. In another embodiment, the first sealing component is a threaded sealing cap, which is screwed onto the outer opening of the extension tube 105, and the threaded connection structure is compact.

[0095] Furthermore, in order to ensure reliable installation of the conveying pipe assembly 201, in one embodiment, the first sealing component is configured as a sealing flange 202, and the second sealing component is configured as a heat insulation cover plate 203; and a connecting flange 106 is also fixedly ringed on the outer peripheral wall of the other end of the extension pipe 105.

[0096] Specifically, the sealing flange 202 is attached to the corresponding side wall of the connecting flange 106 on the side of the extension pipe 105. Multiple fasteners 107 are arranged sequentially and spaced apart along the circumference of the connecting flange 106, and each fastener 107 passes through the connecting flange 106 and the sealing flange 202 sequentially along the axial direction of the extension pipe 105 to detachably and fix them together. In addition, the heat insulation cover 203 is fixedly covered on the opening at the other end of the window neck tube 101.

[0097] More specifically, the sealing flange 202 and the connecting flange 106 are detachably connected via fasteners 107 after being fitted together, allowing for easy disassembly and installation of the first sealing component. This facilitates the insertion and removal of the delivery pipe assembly 201 and routine maintenance, enabling repeated assembly and disassembly of the sealing structure without destructive disassembly. The heat insulation cover 203 is fixedly installed at the other end of the window neck tube 101 opening, providing insulation while preventing heat from being conducted from the end of the window neck tube 101 into the vacuum device. Multiple fasteners 107 are spaced circumferentially to ensure a uniform distribution of the clamping force between the sealing flange 202 and the connecting flange 106, guaranteeing reliable sealing.

[0098] In addition, when the sealing flange 202 and the connecting flange 106 are fixedly fitted together, a sealing gasket is also provided between the side walls of the sealing flange 202 and the connecting flange 106 that are fitted together, which further improves the sealing effect.

[0099] It is necessary to understand that, such as Figure 7 As shown, multiple fixing protrusions 214 can be sequentially arranged along the circumferential edge on the side wall of the heat insulation cover 203 near the other end of the window neck tube 101. Then, multiple connecting recesses can be sequentially arranged along the circumferential direction on the end face of the other end of the window neck tube 101. The multiple fixing protrusions 214 are respectively fixedly embedded into their respective corresponding connecting recesses, thereby realizing that the heat insulation cover 203 is fixedly covered on the opening at the other end of the window neck tube 101, and improving the sealing performance of the heat insulation cover 203 on the opening at the other end of the window neck tube 101.

[0100] More specifically, the structure and arrangement of the fastener 107 are not limited. For example, in one embodiment, the fastener 107 is a bolt, and the sealing flange 202 and the connecting flange 106 are connected by bolts. In another embodiment, the fastener 107 is a clamp, and the sealing flange 202 and the connecting flange 106 are connected by a clamp. The clamp connection allows for quick assembly and disassembly, making it suitable for maintenance scenarios that require frequent disassembly.

[0101] Furthermore, to further insulate and protect the outer peripheral wall of the portion of the delivery pipe assembly 201 extending outside the extension pipe body 105, in one embodiment, such as... Figure 5 and Figure 6 As shown, a connecting sleeve 204 with open ends is also provided on the side of the connecting flange 106 away from the extension pipe body 105. The connecting sleeve 204 is sleeved on the outer periphery of the portion of the conveying pipe assembly 201 that extends outside the extension pipe body 105. One end is detachably fixedly connected to the outside of the connecting flange 106, and the other end extends outward along its axial direction away from the extension pipe body 105 and is detachably covered by a cover flange 205. Thus, an additional sealing cavity is formed outside the extension pipe body 105 through the connecting sleeve 204, providing protection and secondary sealing for the exposed portion of the conveying pipe assembly 201 and reducing the risk of heat leakage in this part.

[0102] It should be noted that, in some embodiments, annular flanges can be fixedly welded to the outer peripheral walls at both ends of the connecting cylinder 204. Then, the annular flange at one end of the connecting cylinder 204 is fitted against one side of the connecting flange 106, and the annular flange at one end of the connecting cylinder 204 and the connecting flange 106 are fixedly and detachably connected together using connectors (such as bolts, clamps, etc.). Similarly, the annular flange at the other end of the connecting cylinder 204 is fitted against one side of the cover flange 205, and the annular flange at the other end of the connecting cylinder 204 is fixedly and detachably connected together using connectors (such as bolts, clamps, etc.). Furthermore, sealing gaskets are provided between the side walls where the annular flange at one end of the connecting cylinder 204 and the connecting flange 106 are fitted together, and between the side walls where the annular flange at the other end of the connecting cylinder 204 and the cover flange 205 are fitted together, thereby improving the sealing performance.

[0103] Specifically, a sleeve 206 is also fitted around the outer periphery of the conveying pipe assembly 201. In the radial direction of the conveying pipe assembly 201, the inner periphery of the sleeve 206 is spaced apart from the outer periphery of the conveying pipe assembly 201. One end of the sleeve 206 extends through the cover flange 205 and the other end extends to the inner side of the heat insulation cover plate 203. One end of the conveying pipe assembly 201 passes through the connecting flange 106 and its outer peripheral wall is fixedly connected to the connecting flange 106.

[0104] More specifically, since the sleeve 206 is fitted around the outer periphery of the conveying pipe assembly 201 and has a radial gap between it and the conveying pipe assembly 201, one end of the sleeve 206 passes through the cover flange 205 and the other end extends to the inner side of the heat insulation cover plate 203, thereby forming a continuous heat insulation barrier around the outer periphery of the conveying pipe assembly 201, separating the conveying pipe assembly 201 from the internal space of the window neck tube 101. The radial gap between the sleeve 206 and the conveying pipe assembly 201 further constitutes a heat insulation space, realizing multi-layer heat insulation protection for the conveying pipe assembly 201.

[0105] In addition, a third bellows body 207 is formed on the sleeve 206, and the third bellows body 207 is located within the range of the window neck tube 101 in the axial direction of the window neck tube 101.

[0106] Specifically, the third corrugated pipe body 207 formed on the sleeve 206 is located within the window neck tube 101, providing axial expansion and contraction compensation capability for the sleeve 206, enabling the sleeve 206 to adapt to axial deformation caused by temperature changes, avoiding excessive stress caused by the expansion and compression of the side wall of the vacuum device, which could lead to deformation or connection failure of the sleeve 206, and ensuring that the sleeve 206 always maintains complete coverage and heat insulation function for the conveying pipe assembly 201 under various temperature conditions.

[0107] The structure and arrangement of the delivery pipe assembly 201 are explained below.

[0108] Specifically, such as Figure 8and Figure 9 As shown, the transmission assembly 200 also includes a sealing ring 208 and an isolation sleeve 209 fixedly sleeved on the other end of the transmission pipe assembly 201. The transmission pipe assembly 201 includes a plurality of cooling pipes 210 arranged radially at intervals from each other on the sleeve 206. One end of the isolation sleeve 209 is fixedly connected to the transmission pipe assembly 201, and the other end is spaced apart from the other end of the sleeve 206. The sealing ring 208 is fixedly embedded between the other end of the isolation sleeve 209 and the other end of the sleeve 206.

[0109] Specifically, by setting a sealing ring 208 embedded between the isolation sleeve 209 and the sleeve 206, a sealed transition is formed at the interval between the two, ensuring the sealing integrity of the internal space of the sleeve 206 and preventing external gas or heat from entering through the gap between the sleeve 206 and the isolation sleeve 209. Furthermore, the isolation sleeve 209 also enhances the heat insulation capacity of the end of the delivery pipe assembly 201 that extends into the vacuum device. In addition, the isolation sleeve 209 is fixedly sleeved on the other end of the delivery pipe assembly 201, bundling and fixing the ends of multiple cooling pipes 210 together, ensuring that the multiple cooling pipes 210 maintain a stable relative position when extended into the vacuum device, and preventing collisions or friction between the cooling pipes 210.

[0110] In addition, the conveying pipe assembly 201 is composed of multiple cooling pipes 210, such as 2, 3, or 5 pipes; the multiple cooling pipes 210 are spaced apart from each other, which can convey different types of cooling media or realize multi-path parallel conveying, thereby improving the layout flexibility and conveying capacity of the conveying pipe assembly 201.

[0111] More specifically, one end of each cooling pipe 210 passes through the cover flange 205, and the outer peripheral wall of the cooling pipe 210 is fixedly connected to the cover flange 205; the other end passes through the isolation sleeve 209 and extends into the interior of the vacuum device. Furthermore, each cooling pipe 210 is covered with a heat insulation layer 211. The heat insulation layer 211 covering the outer periphery of each cooling pipe 210 directly reduces the heat exchange between the low-temperature medium inside the cooling pipe 210 and the internal space of the sleeve 206. Combined with the multi-layered heat insulation structure of the sleeve 206 and the window neck 101, a multi-layered thermal barrier system is formed from the inside out, further reducing overall heat leakage.

[0112] This application does not limit the specific structure and material of the heat insulation layer 211. For example, in one embodiment, the heat insulation layer 211 is an aerogel felt layer, which is wrapped around the outer periphery of the cooling pipe 210 by a winding method. The aerogel felt has extremely low thermal conductivity and excellent heat insulation performance. In another embodiment, the heat insulation layer 211 is a multilayer heat insulation film, which consists of multiple layers of reflective film and spacer layer alternately wrapped around the outer periphery of the cooling pipe 210. The multilayer reflection reduces radiative heat transfer and conductive heat transfer.

[0113] Furthermore, to further enhance the heat insulation capability of the conveying pipe assembly 201, in one embodiment, such as Figure 8 and Figure 9 As shown, the transmission component 200 also includes a first heat insulation shield 212 and a second heat insulation shield 213 located inside the sleeve 206.

[0114] Specifically, the first heat insulation cold shield 212 is arranged around the outer periphery of the conveying pipe assembly 201 and is spaced apart from the conveying pipe assembly 201 in the radial direction of the sleeve 206. One end of the first heat insulation cold shield 212 is fixedly connected to the cover plate flange 205, and the other end passes through the isolation sleeve 209 and the side wall of the vacuum device and extends into the vacuum device. The first heat insulation cold shield 212 is fixedly connected to the isolation sleeve 209.

[0115] More specifically, the second heat insulation cold shield 213 is arranged around the outer periphery of the first heat insulation cold shield 212, and is arranged at intervals from the first heat insulation cold shield 212 in the radial direction of the sleeve 206. One end of the second heat insulation cold shield 213 is fixedly connected to the cover flange 205, and the other end passes through the isolation sleeve 209 and the side wall of the vacuum device and extends into the vacuum device. The second heat insulation cold shield 213 is fixedly connected to the isolation sleeve 209.

[0116] More specifically, the first heat-insulating cold shield 212 and the second heat-insulating cold shield 213 are sequentially fitted inside the sleeve 206 around the outer periphery of the conveying pipe assembly 201, forming a double-layer heat insulation barrier to further enhance the heat insulation effect on the conveying pipe assembly 201. The gap between the two layers of cold shields further blocks the heat transfer path, forming a multi-level heat insulation barrier inside the sleeve 206 from the conveying pipe assembly 201 to the wall of the sleeve 206. In addition, both the first heat-insulating cold shield 212 and the second heat-insulating cold shield 213 extend into the vacuum device through the isolation sleeve 209 and the side wall of the vacuum device, so that the heat insulation range of the cold shield covers the entire path from the cover flange 205 to the interior of the vacuum device, providing heat insulation protection along the entire length of the conveying pipe assembly 201 and avoiding localized weak insulation areas.

[0117] It should be understood that the shapes of the first heat insulation cold shield 212 and the second heat insulation cold shield 213 can be fan-shaped, circular, etc., and this embodiment does not limit them to a single shape.

[0118] The above description illustrates the implementation of this utility model through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0119] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0120] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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 the utility model.

[0121] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0122] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

Claims

1. A stellarator window-pluggable transmission pipeline assembly, the stellarator comprising a cryogenic control device and a vacuum device disposed inside the cryogenic control device, wherein a pair of sidewalls of the cryogenic control device and the vacuum device are spaced apart from each other, and a window is provided on the sidewall of the cryogenic control device; characterized in that, The pluggable transmission line assembly includes: The heat insulation tube assembly includes a window neck tube extending between the low-temperature thermostat and the vacuum device. One end of the window neck tube is fixed to the side wall of the low-temperature thermostat and the vacuum device and aligned with the window, and the other end is fixed to the corresponding side wall of the vacuum device. The transmission assembly includes a delivery tube assembly fitted inside the window neck tube, one end of the delivery tube assembly extending through the window to the outside of the cryogenic constant temperature device, and the other end extending through the side wall of the vacuum device into the interior of the vacuum device; and A heat insulation tube is sleeved on the outer periphery of the window neck tube, and the inner periphery is radially spaced from the outer periphery of the window neck tube. One end of the heat insulation tube is fixedly installed on one side wall of the low temperature constant temperature device, and the other end is fixedly installed on the corresponding side wall of the vacuum device.

2. The stellarator window pluggable transmission line assembly as described in claim 1, characterized in that, An annular fixing seat is provided on the outer peripheral wall of one end of the window neck tube, and the annular fixing seat is fixed to the inner wall of the low temperature constant temperature device; one end of the heat insulation tube is fixed to the inner side of the annular fixing seat, and the other end is fixedly installed on the inner wall of the corresponding side of the vacuum device.

3. The stellarator window pluggable transmission line assembly as described in claim 2, characterized in that, A telescopic section is provided in the middle of the window neck tube, and the radial dimension of the telescopic section is larger than the radial dimensions of both ends of the window neck tube; and The heat insulation tube includes a first heat insulation tube body located near the low-temperature constant temperature device and sleeved around the outer periphery of the telescopic part, and a second heat insulation tube body located near the vacuum device; wherein The radial dimension of the first heat insulation tube is larger than that of the second heat insulation tube, and the ends of the first heat insulation tube and the second heat insulation tube are sleeved together at their closest points; and Along the axial direction of the window neck tube, a plurality of fasteners are sequentially arranged on the outer peripheral wall of the second heat insulation tube body. A connecting protrusion corresponding to each of the plurality of fasteners is provided on the outer peripheral surface of the window neck tube, and the top of each connecting protrusion abuts against the inner wall surface of the second heat insulation tube body. Each fastener passes through the tube wall of the second heat insulation tube body and is fixedly connected to the corresponding connecting protrusion.

4. The stellarator window pluggable transmission line assembly as described in claim 3, characterized in that, The telescopic section includes a plurality of corrugated tubes arranged sequentially and spaced apart from each other along the axial direction of the window neck tube in the middle of the window neck tube, wherein each corrugated tube and both ends of the window neck tube are rigid tubes; and The ends of the first and second heat insulation tubes that are sleeved together are provided with flexible connectors, which are arranged around the inner periphery of the sleeved portion around the window neck tube.

5. The stellarator window pluggable transmission line assembly as described in claim 4, characterized in that, The first heat insulation tube body has an annular limiting portion extending radially inward at one end near the second heat insulation tube body, and the corresponding end of the second heat insulation tube body has an annular limiting portion extending radially outward. The ends of the first heat insulation tube body and the second heat insulation tube body that are sleeved on each other are connected to each other through the annular limiting portion and the annular limiting portion. The flexible connector consists of multiple spring tabs evenly spaced circumferentially along the window neck tube. Each spring tab extends axially along the window neck tube, with one end fixedly connected to the inner wall of the first heat insulation tube and the other end fixedly connected to the inner wall of the annular limiting portion. The annular limiting part is sleeved on the inner side of the annular limiting part, and in the axial direction of the window neck tube, the annular limiting part and the annular limiting part have a first gap with each other, and in the radial direction of the window neck tube, the annular limiting part has a second gap with the inner wall surface of the first heat insulation tube body.

6. The stellarator window pluggable transmission line assembly as described in any one of claims 1-5, characterized in that, An extension tube is provided at one end of the window neck tube, and the extension tube extends axially from one end of the window neck tube through the window to the outside of the low temperature constant temperature device. The transmission assembly further includes a first sealing component covering the opening on the outside of the extension tube, and a second sealing component adapted to cover the opening at the other end of the window neck tube. One end of the delivery tube assembly extends through the first sealing component to the outside of the extension tube, and the other end extends through the second sealing component to the inside of the vacuum device.

7. The stellarator window pluggable transmission line assembly as described in claim 6, characterized in that, The first sealing component is configured as a sealing flange, and the second sealing component is configured as a heat insulation cover plate; furthermore, a connecting flange is fixedly ringed on the outer peripheral wall of the other end of the extension tube; wherein The sealing flange, near the extension tube, is abutted against the corresponding side wall of the connecting flange. Multiple fasteners are spaced apart circumferentially along the connecting flange, and each fastener passes sequentially through the connecting flange and the sealing flange along the axial direction of the extension tube, detachably and securely connecting the two. The heat insulation cover is fixedly installed over the opening at the other end of the window neck tube.

8. The stellarator window pluggable transmission line assembly as described in claim 7, characterized in that, A connecting sleeve with open ends is also provided on the side of the connecting flange away from the extension pipe body. The connecting sleeve is sleeved on the outer periphery of the portion of the conveying pipe assembly that extends outside the extension pipe body. One end is detachably fixedly connected to the outside of the connecting flange, and the other end extends outward along its axial direction away from the extension pipe body, with the other end open and detachably covered by a cover flange. A sleeve is also fitted around the outer periphery of the conveying pipe assembly. In the radial direction of the conveying pipe assembly, the inner circumference of the sleeve is spaced apart from the outer circumference of the conveying pipe assembly. One end of the sleeve extends through the cover flange, and the other end extends to the inner side of the heat insulation cover. One end of the conveying pipe assembly passes through the connecting flange, and its outer peripheral wall is fixedly connected to the connecting flange. A third corrugated tube body is also formed on the sleeve, and the third corrugated tube body is located within the range of the window neck tube along the axial direction of the window neck tube.

9. The stellarator window pluggable transmission line assembly as described in claim 8, characterized in that, The transmission assembly further includes a sealing ring and an isolation sleeve fixedly fitted to the other end of the delivery pipe assembly, wherein the delivery pipe assembly includes a plurality of cooling pipes spaced apart from each other radially from the sleeve; wherein, One end of the isolation sleeve is fixedly connected to the conveying pipe assembly, and the other end is spaced apart from the other end of the sleeve. The sealing ring is fixedly embedded between the other end of the isolation sleeve and the other end of the sleeve. One end of each cooling pipe passes through the cover flange, and the outer peripheral wall of the cooling pipe is fixedly connected to the cover flange; the other end passes through the isolation sleeve and extends into the interior of the vacuum device; and the outer periphery of each cooling pipe is covered with a heat insulation layer.

10. The stellarator window pluggable transmission line assembly as described in claim 9, characterized in that, The transmission assembly further includes a first heat-insulating cold shield and a second heat-insulating cold shield located inside the sleeve; wherein The first heat insulation cold shield is arranged around the outer periphery of the conveying pipe assembly and is spaced apart from the conveying pipe assembly in the radial direction of the sleeve. One end of the first heat insulation cold shield is fixedly connected to the cover plate flange, and the other end passes through the isolation sleeve and the side wall of the vacuum device and extends into the vacuum device. The first heat insulation cold shield is fixedly connected to the isolation sleeve. The second heat insulation cold shield ring is disposed on the outer periphery of the first heat insulation cold shield and is spaced apart from the first heat insulation cold shield ring in the radial direction of the sleeve. One end of the second heat insulation cold shield is fixedly connected to the cover plate flange, and the other end passes through the isolation sleeve and the side wall of the vacuum device and extends into the vacuum device. The second heat insulation cold shield is fixedly connected to the isolation sleeve.

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