Composite multichannel multi-media pipeline for fusion devices

Abstract

This invention relates to the field of fusion device technology and discloses a composite multi-channel multi-medium pipeline for fusion devices. The composite multi-channel multi-medium pipeline includes a heat shield, a vacuum pipeline, a liquid helium delivery assembly, and a first gaseous helium delivery assembly. The heat shield has a hollow interior forming a first accommodating space. The vacuum pipeline is sleeved around the outer periphery of the heat shield and spaced apart from it. A second accommodating space is formed between the heat shield and the vacuum pipeline. The heat shield is used to shield heat transfer between the first and second accommodating spaces. The liquid helium delivery assembly is used to deliver liquid helium and is located within the first accommodating space and fixedly connected to the heat shield. The first gaseous helium delivery assembly is used to deliver first gaseous helium and is located within the second accommodating space and fixedly connected to both the heat shield and the vacuum pipeline. This composite multi-channel multi-medium pipeline for fusion devices is not only suitable for the transmission of different media but also avoids heat transfer between different media.

Description

Technical Field

[0001] This invention relates to the field of fusion device technology, and in particular to a composite multi-channel multi-medium pipeline for fusion devices. Background Technology

[0002] Fusion devices include dozens of subsystems such as vacuum systems and cryogenic systems. The cryogenic system of a fusion device delivers various cryogenic liquids or gases to various cryogenic devices to meet their cryogenic requirements. It can also control the flow rate of various cryogenic liquids. The collection of multiple delivery pipelines is called a multi-channel delivery pipeline.

[0003] However, existing multi-channel delivery pipelines can only deliver a single medium and are not suitable for the transmission of different media required by multiple cryogenic pumps in a fusion device. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a composite multi-channel multi-medium pipeline for fusion devices. The composite multi-channel multi-medium pipeline for fusion devices is suitable for the transmission of different media and can avoid heat transfer between different media, thus solving the technical problem that existing multi-channel transmission pipelines can only transport a single medium.

[0005] A composite multi-channel multi-medium pipeline for a fusion device according to an embodiment of the present invention includes: a heat shield, the heat shield having a hollow interior forming a first accommodating space; a vacuum pipe, the vacuum pipe being sleeved on the outer periphery of the heat shield and spaced apart from the heat shield, the heat shield and the vacuum pipe forming a second accommodating space, the heat shield being used to shield heat transfer between the first accommodating space and the second accommodating space; a liquid helium delivery assembly, the liquid helium delivery assembly being used to deliver liquid helium, the liquid helium delivery assembly being disposed within the first accommodating space and fixedly connected to the heat shield; and a first gaseous helium delivery assembly, the first gaseous helium delivery assembly being used to deliver first gaseous helium, the first gaseous helium delivery assembly being disposed within the second accommodating space and fixedly connected to the heat shield and the vacuum pipe, respectively.

[0006] According to embodiments of the present invention, the composite multi-channel multi-medium pipeline for a fusion device, by providing a liquid helium delivery component and a first gaseous helium delivery component, makes the composite multi-channel multi-medium pipeline of the present application suitable for the transmission of different media; by providing a heat shield, a heat shield layer is established between the first gaseous helium delivery component and the liquid helium delivery component, which to a certain extent avoids the direct heat load of the first gaseous helium delivery component on the liquid helium delivery component. Therefore, the composite multi-channel multi-medium pipeline of the present application is not only suitable for the transmission of different media, improving the transmission efficiency, but also avoids heat transfer between different media, ensuring the transmission quality.

[0007] In some embodiments, the heat shield includes a heat-conducting element, a protective element, and an absorber. The protective element is disposed on the outer periphery of the heat-conducting element and is used to protect the heat-conducting element. The absorber is disposed on the outer periphery of the protective element and is located on the side of the heat shield facing the first accommodating space. The absorber is used to absorb the heat transferred to the heat shield.

[0008] In some embodiments, the heat-conducting element is a copper element, and a nickel layer is provided on the outer periphery of the copper element to form the protective element. The outer surface of the protective element facing the first accommodating space is provided with black paint to form the absorbent element.

[0009] In some embodiments, the liquid helium delivery assembly includes a first support member and a liquid helium pipeline. The first support member is fixedly connected to the heat shield member, and the liquid helium pipeline is disposed on the first support member and is adapted to be filled with liquid helium.

[0010] In some embodiments, the liquid helium delivery assembly further includes a heat insulation element that is fitted around the periphery of the liquid helium pipeline.

[0011] In some embodiments, at least a portion of the outer peripheral wall of the first support member is recessed in a direction away from the heat shield member.

[0012] In some embodiments, at least a portion of the liquid helium pipeline is formed as a flexible tube.

[0013] In some embodiments, the first helium delivery assembly includes a second support member and a first helium gas pipeline. The second support member extends circumferentially along the vacuum pipeline and is fixedly connected to the heat shield and the vacuum pipeline, respectively. The first helium gas pipeline is disposed on the second support member and is adapted to be filled with first helium gas.

[0014] In some embodiments, the first support member and / or the second support member are polytetrafluoroethylene (PTFE) members; and / or, the first support member and / or the second support member are provided with through holes, the through holes penetrating the first support member and / or the second support member along the axial direction of the vacuum pipe.

[0015] In some embodiments, the through holes include a plurality of through holes, at least a portion of which are spaced around the outer periphery of the liquid helium pipeline and / or the first gaseous helium pipeline; at least a portion of the through holes provided on the first support member are located between the connection between the first support member and the heat shield member and the liquid helium pipeline.

[0016] In some embodiments, the second support member includes a first part and a second part that are connected to each other. In the circumferential direction of the vacuum pipe, the extension length of the first part is greater than the extension length of the second part. The first gas-helium pipe is disposed in the second part. The first part is connected to the heat shield. The second part is spaced apart from the heat shield.

[0017] In some embodiments, the first portion is provided with multiple sets of through components, which are arranged radially spaced along the vacuum pipe. Each set of through components includes multiple through holes, which are arranged circumferentially spaced along the vacuum pipe. In two adjacent sets of through components, radially along the vacuum pipe, the through holes of one set of through components are directly opposite the gap between two adjacent through holes of the other set of through components. The second portion is provided with multiple through holes, at least some of which are located between the connection between the first portion and the second portion and the first gas-helium pipeline.

[0018] In some embodiments, the composite multichannel multi-medium pipeline for the fusion device further includes a second helium gas pipeline for transporting a second helium gas at a temperature lower than that of the first helium gas, and the second helium gas pipeline is disposed on the heat shield.

[0019] In some embodiments, at least a portion of the heat shield is bent to form a fixing groove, and the second helium gas pipeline is disposed within the fixing groove.

[0020] In some embodiments, the vacuum pipe, the liquid helium pipe, the first gaseous helium pipe and / or the second gaseous helium pipe are stainless steel pipes; and / or, the liquid helium pipe, the first gaseous helium pipe and the second gaseous helium pipe are arranged in the same direction.

[0021] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of a composite multi-channel multi-medium pipeline according to some embodiments of the present invention.

[0024] Figure 2 This is a front view of a composite multichannel multi-medium pipeline according to some embodiments of the present invention.

[0025] Figure 3 This is a schematic diagram of a heat shielding component according to some embodiments of the present invention.

[0026] Figure 4 This is a schematic diagram of the first support member according to some embodiments of the present invention.

[0027] Figure 5 This is a schematic diagram of the second support member according to some embodiments of the present invention.

[0028] Figure 6 This is a schematic diagram of a three-way structure composed of a composite multi-channel multi-medium pipeline according to some embodiments of the present invention.

[0029] Figure label:

[0030] 1000, Composite Multi-channel Multi-media Pipeline;

[0031] 100. Heat shield; 110. First receiving space; 120. Fixing groove;

[0032] 200. Vacuum pipe; 210. Second containment space;

[0033] 300. Liquid helium delivery assembly;

[0034] 310. First support member; 311. First through hole;

[0035] 320. Liquid helium piping;

[0036] 400. First gas-helium delivery assembly;

[0037] 410. Second support component;

[0038] 411. Part One;

[0039] 412. Second part; 413. Second through hole;

[0040] 420. First helium gas pipeline;

[0041] 500, Second helium gas pipeline;

[0042] 4111, Through component; 4112, Through hole. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "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 invention 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 invention.

[0045] The following description, with reference to the accompanying drawings, describes an embodiment of the present invention: a composite multichannel multi-medium pipeline 1000 for a fusion device.

[0046] like Figure 1 As shown, a composite multi-channel multi-medium pipeline 1000 for a fusion device according to an embodiment of the present invention includes: a heat shield 100, a vacuum pipeline 200, a liquid helium delivery assembly 300, and a first gas helium delivery assembly 400.

[0047] Among them, combined Figure 1 , Figure 2 and Figure 3 As shown, the heat shield 100 has a hollow interior forming a first accommodating space 110. The first accommodating space 110 facilitates the installation of other components inside the composite multi-channel multi-medium pipeline 1000, reduces the installation difficulty of other components inside the composite multi-channel multi-medium pipeline 1000, and enables at least one component to be located inside the heat shield 100.

[0048] Combination Figure 1 and Figure 2 As shown, the vacuum pipe 200 is sleeved around the outer periphery of the heat shield 100 and spaced apart from the heat shield 100. A second accommodating space 210 is formed between the heat shield 100 and the vacuum pipe 200. The heat shield 100 is used to shield the heat transfer between the first accommodating space 110 and the second accommodating space 210. By sleeved around the outer periphery of the heat shield 100 and spaced apart from the heat shield 100, the vacuum pipe 200 serves two purposes: firstly, it encloses and supports internal components (such as the first gas-helium transport assembly 400, the heat shield 100, etc.); secondly, it provides vacuum insulation, thereby preventing external heat from entering the interior of the vacuum pipe 200 to a certain extent, maintaining the low-temperature working environment inside the vacuum pipe 200, and thus ensuring the working performance of the composite multi-channel multi-medium pipeline 1000.

[0049] In a specific example, the vacuum pipe 200 can contain and support the heat shield 100, the first gas helium transport assembly 400, and the liquid helium transport assembly 300. The vacuum pipe 200 also serves as vacuum insulation, thereby preventing external heat from entering the interior of the vacuum pipe 200 to a certain extent, so as to maintain the low temperature environment inside the vacuum pipe 200 and ensure the normal operation of the heat shield 100, the first gas helium transport assembly 400, and the liquid helium transport assembly 300.

[0050] Meanwhile, by using the heat shield 100 to shield the heat transfer between the first containing space 110 and the second containing space 210, the heat transferred from the second containing space 210 to the first containing space 110 can be shielded to a certain extent, thereby avoiding the heat load of the second containing space 210 on the first containing space 110, so that the first containing space 110 can maintain a low temperature environment to facilitate the transmission of the low temperature medium.

[0051] Combination Figure 1 and Figure 2 As shown, the liquid helium delivery assembly 300 is used to deliver liquid helium. The liquid helium delivery assembly 300 is disposed within the first accommodating space 110 and fixedly connected to the heat shield 100. By fixing the liquid helium delivery assembly 300 to the heat shield 100, the heat shield 100 can stably support the liquid helium delivery assembly 300, ensuring the stability of the liquid helium delivery assembly 300.

[0052] Meanwhile, the liquid helium delivery assembly 300 is placed in the first containment space 110. Since the heat shield 100 is used to shield the heat transfer between the first containment space 110 and the second containment space 210, it further avoids the direct heat load of the second containment space 210 on the liquid helium delivery assembly 300 to a certain extent, so as to ensure the stable delivery of the cryogenic medium in the liquid helium delivery assembly 300.

[0053] Combination Figure 1 and Figure 2 As shown, the first gaseous helium delivery assembly 400 is used to deliver first gaseous helium. The first gaseous helium delivery assembly 400 is disposed within the second receiving space 210 and is fixedly connected to the heat shield 100 and the vacuum pipe 200, respectively. By placing the first gaseous helium delivery assembly 400 within the second receiving space 210, the liquid helium delivery assembly 300 and the first gaseous helium delivery assembly 400 can be positioned on opposite sides of the heat shield 100. This allows the heat shield 100 to shield the heat transfer between the first gaseous helium delivery assembly 400 and the liquid helium delivery assembly 300, thus avoiding a thermal load on the liquid helium delivery assembly 300 from the first gaseous helium delivery assembly 400.

[0054] Meanwhile, by fixing the first gas helium delivery component 400 to the heat shield 100 and the vacuum pipe 200 respectively, the vacuum pipe 200 and the heat shield 100 can be used to support the first gas helium delivery component 400, ensuring the stability of the first gas helium delivery component 400, thereby ensuring the working performance of the first gas helium delivery component 400.

[0055] It should be noted that the first gaseous helium conveying assembly 400 is used to convey gaseous helium, and the liquid helium conveying assembly 300 is used to convey liquid helium. Under standard atmospheric pressure, the temperature of gaseous helium is higher than that of liquid helium. Therefore, under the same pressure conditions, the temperature of gaseous helium must be higher than that of liquid helium. Consequently, the temperature of the medium in the first gaseous helium conveying assembly 400 is higher than that of the medium in the liquid helium conveying assembly 300. The heat load of the gaseous helium in the first gaseous helium conveying assembly 400 affects the temperature of the liquid helium in the liquid helium conveying assembly 300, which may prevent the liquid helium from maintaining a low temperature.

[0056] To address the aforementioned issues, this application incorporates a heat shield 100 to shield the heat transfer between the first accommodating space 110 and the second accommodating space 210. This shields the heat transfer between the first gas-helium transport assembly 400 and the liquid-helium transport assembly 300, thereby mitigating the direct heat load from the first gas-helium transport assembly 400 to the liquid-helium transport assembly 300 and reducing the heat transferred from the first gas-helium transport assembly 400 to the liquid-helium transport assembly 300. Consequently, the composite multi-channel multi-medium pipeline 1000 can be used for the transmission of different media, improving the transport efficiency and performance of the composite multi-channel multi-medium pipeline 1000.

[0057] As can be seen from the above structure, the composite multi-channel multi-medium pipeline 1000 for fusion devices in this application embodiment has multiple channels by setting up a liquid helium delivery component 300 and a first gas helium delivery component 400, so that the composite multi-channel multi-medium pipeline 1000 has multiple channels, which facilitates the delivery of multiple media and ensures the performance of the media delivered by the composite multi-channel multi-medium pipeline 1000.

[0058] Meanwhile, by setting up a heat shield 100 to shield the heat transfer between the first containment space 110 and the second containment space 210, and by setting the liquid helium delivery assembly 300 in the first containment space 110 and the first gaseous helium delivery assembly 400 in the second containment space 210, the heat shield 100 can shield the heat transfer between the liquid helium delivery assembly 300 and the first gaseous helium delivery assembly 400, thus satisfying the transmission of the cryogenic medium in the liquid helium delivery assembly 300 required by the cryogenic pump in the fusion device.

[0059] It is understandable that, compared with the prior art, the composite multi-channel multi-medium pipeline 1000 for fusion devices of this application can not only transmit multiple media, but also avoid heat transfer between multiple media to a certain extent, thereby improving the transmission efficiency and working performance of the composite multi-channel multi-medium pipeline 1000.

[0060] In the description of this invention, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, used to distinguish and describe features, without any order or importance.

[0061] In some embodiments, the heat shield 100 includes a heat-conducting element, a protective element, and an absorber. The protective element is disposed on the outer periphery of the heat-conducting element and is used to protect the heat-conducting element. The absorber is disposed on the outer periphery of the protective element and located on the side of the heat shield 100 facing the first receiving space 110. The absorber is used to absorb the heat transferred to the heat shield 100. The heat-conducting element enables heat transfer, thereby making the temperature of the heat shield 100 more uniform. The protective element prevents corrosion damage to the heat-conducting element, extends the service life of the heat shield 100, and ensures the heat shielding performance of the heat shield 100. The absorber absorbs the heat transferred to the heat shield 100, preventing heat transfer through the heat shield 100, thereby shielding the heat transfer between the liquid helium delivery assembly 300 and the first gas helium delivery assembly 400.

[0062] In some embodiments, the heat-conducting element is made of copper, and a nickel layer is provided on the outer periphery of the copper element to form a protective element. The outer surface of the protective element facing the first receiving space 110 is provided with black paint to form an absorbent element. That is, the heat-conducting element is made of copper. Since copper has a high thermal conductivity, the heat-conducting element can better transfer heat, thereby making the temperature of the heat shield 100 more uniform, so as to ensure the heat shielding effect of the heat shield 100.

[0063] Meanwhile, by providing a nickel layer around the outer periphery of the copper component to form a protective layer, the heat-conducting component can be protected to a certain extent, preventing it from rusting.

[0064] Furthermore, since some heat is still transferred to the first receiving space 110 through the heat-conducting component after being shielded by the heat shield 100, the heat transferred to the heat shield 100 can be absorbed by the absorber by providing black paint on the outer surface of the protective component facing the first receiving space 110 to form an absorber, thereby reducing the impact of heat load on the liquid helium delivery assembly 300.

[0065] It should be noted that the outer surface of the protective component facing away from the first accommodating space 110 retains a nickel layer, which can reflect the thermal radiation of the first gas helium delivery assembly 400 to the liquid helium delivery assembly 300, thereby reducing the heat transfer of the first gas helium delivery assembly 400.

[0066] In summary, the main body of the heat shield 100 is made of copper, which makes the temperature of the heat shield 100 more uniform. By plating the entire heat shield 100 with bright nickel and spraying black paint on the outer surface of the protective component facing the first accommodating space 110, the heat shield 100 can be effectively prevented from being corroded. At the same time, it can also reflect the heat transferred to the outside of the heat shield 100 and absorb the heat transferred to the inside of the heat shield 100, thereby improving the heat shielding performance of the heat shield 100 and reducing the thermal load of the first gas helium delivery assembly 400 on the liquid helium delivery assembly 300.

[0067] Of course, in other embodiments, the main body of the heat shield 100 can also be made of oxygen-free copper, aluminum or silver, so that the temperature distribution of the heat shield 100 is more uniform. At the same time, the outer periphery of the main body can be plated with gold or silver to form a protective element, which can effectively prevent the heat shield 100 from being corroded, and can also reflect the heat transferred to the outside of the heat shield 100. Furthermore, a carbon nanotube coating or a silicon carbide (SiC) coating can be provided on the outer surface of the protective element facing the first accommodating space 110 to absorb the heat transferred to the inside of the heat shield 100, improve the heat shielding performance of the heat shield 100, and reduce the thermal load of the first gas helium delivery assembly 400 on the liquid helium delivery assembly 300.

[0068] In some embodiments, combined with Figure 2 and Figure 4 As shown, the liquid helium delivery assembly 300 includes a first support member 310 and a liquid helium pipeline 320. The first support member 310 is fixedly connected to a heat shield member 100, and the liquid helium pipeline 320 is disposed on the first support member 310, with the liquid helium pipeline 320 suitable for being filled with liquid helium. By fixing the first support member 310 to the heat shield member 100, the heat shield member 100 can stably support the first support member 310, reducing the installation difficulty of the first support member 310. This facilitates the stable support of the liquid helium pipeline 320 by the first support member 310, ensuring the stability of the liquid helium pipeline 320 and promoting stable liquid helium transmission.

[0069] It should be noted that the temperature of liquid helium is 4.2K (approximately -268.95℃). In the specific example, combined with... Figure 1 and Figure 2 As shown, the liquid helium line 320 has two lines, one of which is a supply line and the other is a return line, which facilitates the transport of 4.2K liquid helium.

[0070] In some embodiments, combined with Figure 2 and Figure 4As shown, the first support member 310 is provided with a first through hole 311, through which the liquid helium pipeline 320 is connected to the first support member 310. The first through hole 311 can reduce the difficulty of connecting the first support member 310 and the liquid helium pipeline 320, and facilitate the assembly of the first support member 310 and the liquid helium pipeline 320, thereby facilitating the placement of the liquid helium pipeline 320 on the first support member 310.

[0071] In some embodiments, the liquid helium delivery assembly 300 further includes a heat insulation element (not shown) which is sleeved around the outer periphery of the liquid helium pipeline 320. The heat insulation element can insulate the liquid helium pipeline 320, thereby reducing heat transfer between the first support member 310 and the liquid helium pipeline 320 to a certain extent and ensuring stable liquid helium delivery.

[0072] In the specific example, the insulation component is an insulating film that can insulate the liquid helium pipeline 320.

[0073] In some embodiments, such as Figure 2 As shown, at least a portion of the outer peripheral wall of the first support member 310 is recessed in the direction away from the heat shield member 100. On the one hand, this increases the distance between at least a portion of the first support member 310 and the heat shield member 100, facilitating gas flow inside the vacuum pipe 200. On the other hand, it helps to reduce the contact area between the first support member 310 and the heat shield member 100, thereby reducing heat transfer between them.

[0074] In some embodiments, such as Figure 2 As shown, the outer peripheral walls of the first support member 310 are all recessed in the direction away from the heat shield member 100, so that the first support member 310 has an "I" shaped structure. The first support member 310 is fixedly connected to the heat shield member 100 only by the four corners of the "I", which effectively reduces the contact area between the first support member 310 and the heat shield member 100.

[0075] In some embodiments, at least a portion of the liquid helium line 320 is formed as a flexible tube (not shown in the figure). This allows at least a portion of the liquid helium line 320 to deform under external force, thereby preventing leakage of the liquid helium line 320 due to shrinkage and deformation at deep cryogenic temperatures, thus avoiding liquid helium outflow and facilitating stable liquid helium transport using the liquid helium line 320.

[0076] In some embodiments, the liquid helium line 320 includes a rigid tube and a flexible tube, the flexible tube being welded to the rigid tube so that at least a portion of the liquid helium line 320 forms a flexible tube, which helps to prevent leakage of the liquid helium line 320 due to shrinkage and deformation at deep cryogenic temperatures.

[0077] In some embodiments, combined with Figure 2 and Figure 5 As shown, the first helium delivery assembly 400 includes a second support member 410 and a first helium gas pipeline 420. The second support member 410 extends circumferentially along the vacuum pipeline 200 and is fixedly connected to the heat shield 100 and the vacuum pipeline 200, respectively. The first helium gas pipeline 420 is disposed on the second support member 410 and is suitable for being filled with first helium gas. The fixed connection between the second support member 410 and the heat shield 100 and the vacuum pipeline 200 facilitates stable support of the second support member 410 by the cooperation of the heat shield 100 and the vacuum pipeline 200, thereby improving the positional stability of the second support member 410.

[0078] Meanwhile, by extending the second support 410 along the circumference of the vacuum pipe 200, the stress concentration of the first gas-helium pipe 420 can also be relieved.

[0079] In addition, the first helium gas pipeline 420 is provided on the second support member 410 so that the second support member 410 can support the first helium gas pipeline 420, reduce the installation difficulty of the first helium gas pipeline 420, and improve the positional stability of the first helium gas pipeline 420, which is conducive to the stable transmission of the first helium gas.

[0080] In specific examples, combined Figure 2 and Figure 5 As shown, the second support member 410 has an overall ring structure. The ring fits against the inner wall of the vacuum pipe 200, which can not only fix and support the internal pipeline of the vacuum pipe 200, but also relieve the stress concentration of the internal pipeline of the vacuum pipe 200.

[0081] It should be noted that the temperature of the first helium gas is 300K (approximately 26.85℃). Specifically, in conjunction with... Figure 1 and Figure 2 As shown, the first helium gas pipeline 420 has two lines, one of which is the first gas supply pipeline and the other is the first gas return pipeline, which facilitates the delivery of 300K helium gas.

[0082] In some embodiments, combined with Figure 2 and Figure 5 As shown, the second support member 410 is provided with a second through hole 413, and the first helium gas pipeline 420 is connected to the second support member 410 through the second through hole 413. The second through hole 413 can reduce the connection difficulty between the second support member 410 and the first helium gas pipeline 420, realize the support of the first helium gas pipeline 420 by the second support member 410, and improve the positional stability of the first helium gas pipeline 420.

[0083] In some embodiments, the first support member 310 and / or the second support member 410 are polytetrafluoroethylene (PTFE) components. This means that the first support member 310 is a PTFE component, or the second support member 410 is a PTFE component, or both the first support member 310 and the second support member 410 are PTFE components.

[0084] Among them, due to the low thermal conductivity of polytetrafluoroethylene, the first support 310 and / or the second support 410 can, to a certain extent, hinder the heat transfer between the first gas helium delivery assembly 400 and the liquid helium delivery assembly 300, thereby reducing the impact of heat load on the liquid helium pipeline 320; at the same time, the low outgassing rate of polytetrafluoroethylene can, to a certain extent, prevent the first support 310 and / or the second support 410 from releasing gas. Since the vacuum pipeline 200 needs to maintain a vacuum environment, the vacuuming time inside the vacuum pipeline 200 can be reduced.

[0085] In some embodiments, combined with Figure 4 and Figure 5 As shown, the first support member 310 and / or the second support member 410 are provided with through holes 4112, which penetrate the first support member 310 and / or the second support member 410 along the axial direction of the vacuum pipe 200. This means that the first support member 310 is provided with through holes 4112, which penetrate the first support member 310 along the axial direction of the vacuum pipe 200; or, the second support member 410 is provided with through holes 4112, which penetrate the second support member 410 along the axial direction of the vacuum pipe 200; or, both the first support member 310 and the second support member 410 are provided with through holes 4112, with the through hole 4112 of the first support member 310 penetrating the first support member 310 along the axial direction of the vacuum pipe 200, and the through hole 4112 of the second support member 410 penetrating the second support member 410 along the axial direction of the vacuum pipe 200.

[0086] It should be noted that the through hole 4112 can, on the one hand, block heat transfer on the first support member 310 and / or the second support member 410, effectively reducing the heat transfer efficiency of the first support member 310 and the second support member 410, thereby blocking heat transfer between the first gas helium delivery assembly 400 and the liquid helium delivery assembly 300; on the other hand, the through hole 4112 can ensure that the gas in the vacuum pipe 200 can flow smoothly, reducing the vacuuming time.

[0087] In some embodiments, combined with Figure 2 , Figure 4 and Figure 5As shown, the through holes 4112 include multiple through holes, at least some of which are spaced around the outer periphery of the liquid helium pipeline 320 and / or the first gaseous helium pipeline 420. This can be understood as follows: when the first support member 310 has through holes 4112, at least some of the through holes 4112 are spaced around the outer periphery of the liquid helium pipeline 320; when the second support member 410 has through holes 4112, at least some of the through holes 4112 are spaced around the outer periphery of the first gaseous helium pipeline 420. The through holes 4112 on the first support member 310 can, to a certain extent, hinder heat transfer between the first support member 310 and the liquid helium pipeline 320, and the through holes 4112 on the second support member 410 can, to a certain extent, hinder heat transfer between the second support member 410 and the first gaseous helium pipeline 420, thereby achieving the purpose of blocking heat transfer between the first gaseous helium delivery assembly 400 and the liquid helium delivery assembly 300, and reducing the impact of heat load on the liquid helium pipeline 320.

[0088] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0089] In some embodiments, combined with Figure 2 and Figure 4 As shown, at least a portion of the through hole 4112 provided on the first support member 310 is located between the connection between the first support member 310 and the heat shield 100 and the liquid helium pipeline 320. This can reduce the heat transfer between the heat shield 100 and the liquid helium pipeline 320, thereby reducing the impact of heat load on the liquid helium pipeline 320.

[0090] In some embodiments, combined with Figure 2 and Figure 5 As shown, the second support member 410 includes a first part 411 and a second part 412 that are interconnected. In the circumferential direction of the vacuum pipe 200, the extension length of the first part 411 is greater than the extension length of the second part 412. A first gas-helium pipeline 420 is disposed on the second part 412. The first part 411 is connected to the heat shield 100, and the second part 412 is spaced apart from the heat shield 100. By configuring the second support member 410 to include the interconnected first part 411 and the second part 412, a surface-to-surface contact is formed between them. Compared to a one-piece design, the interconnected first part 411 and the second part 412 increase the thermal resistance between them, reducing heat transfer from the first gas-helium pipeline 420 to the entire second support member 410. This reduces the high-temperature region inside the vacuum pipe 200, which is beneficial for reducing the thermal load of the first gas-helium delivery assembly 400 on the liquid helium delivery assembly 300.

[0091] Meanwhile, since the first gas-helium pipeline 420 is located in the second part 412, by setting the extension length of the first part 411 to be greater than the extension length of the second part 412, the second support member 410 can extend along the circumference of the vacuum pipeline 200, while the heat transferred by the first gas-helium pipeline 420 can be confined to a smaller area, thereby reducing the thermal radiation of the first gas-helium pipeline 420 to the liquid helium delivery assembly 300.

[0092] In addition, by connecting the first part 411 to the heat shield 100 and spacing the second part 412 from the heat shield 100, the second support 410 and the heat shield 100 are fixedly connected, and the heat on the second part 412 is prevented from being directly transferred to the heat shield 100, which helps to reduce the heat load of the first gas helium delivery assembly 400 on the liquid helium delivery assembly 300.

[0093] In some embodiments, combined with Figure 2 and Figure 5 As shown, the first part 411 has a protrusion at one end facing the second part 412, and the second part 412 has a recess at one end facing the first part 411. The protrusion is connected to the recess to achieve a mating connection between the first part 411 and the second part 412, and to increase the connection strength between the first part 411 and the second part 412.

[0094] In some embodiments, combined with Figure 2 and Figure 5 As shown, the first part 411 is provided with multiple sets of through-holes 4111, which are arranged radially at intervals along the vacuum pipe 200. Each set of through-holes 4111 includes multiple through holes 4112, which are arranged circumferentially at intervals along the vacuum pipe 200. This arrangement of multiple through holes 4112 on the first part 411 reduces the heat transfer efficiency on the first part 411 and helps to block heat transfer between the first gaseous helium transport assembly 400 and the liquid helium transport assembly 300.

[0095] In some embodiments, combined with Figure 2 and Figure 5 As shown, in two adjacent sets of through-hole assemblies 4111, in the radial direction of the vacuum pipe 200, the through-hole 4112 of one set of through-hole assemblies 4111 is directly opposite the gap between two adjacent through-holes 4112 of the other set of through-hole assemblies 4111. This misalignment of the through-holes 4112 between adjacent through-hole assemblies 4111 prevents continuous heat transfer when heat is transferred radially along the first part 411 of the vacuum pipe 200, thereby reducing the heat transfer efficiency of the first part 411 and consequently reducing the heat transfer efficiency between the first part 411 and the heat shield 100.

[0096] In some embodiments, combined with Figure 2 and Figure 5 As shown, the second part 412 is provided with multiple through holes 4112, at least some of which are located between the connection between the first part 411 and the second part 412 and the first gaseous helium pipeline 420. This can reduce heat transfer between the first gaseous helium pipeline 420 and the first part 411, confining the heat transferred by the first gaseous helium pipeline 420 to a smaller area, thereby reducing the impact of the first gaseous helium pipeline 420 on the liquid helium pipeline 320.

[0097] In some embodiments, combined with Figure 1 and Figure 2 As shown, the composite multi-channel multi-medium pipeline 1000 for a fusion device also includes a second helium gas pipeline 500. The second helium gas pipeline 500 is used to transport a second type of helium gas, the temperature of which is lower than that of the first type of helium gas. The second helium gas pipeline 500 is located within the heat shield 100. By providing the second helium gas pipeline 500, the composite multi-channel multi-medium pipeline 1000 can transport helium gas at different temperatures, thereby improving the operating performance of the composite multi-channel multi-medium pipeline 1000.

[0098] Meanwhile, by placing the second helium gas pipeline 500 within the heat shield 100, on the one hand, the heat shield 100 can stably support the second helium gas pipeline 500, reducing the installation difficulty of the second helium gas pipeline 500 and improving its stability, thus ensuring its performance; on the other hand, since the temperature of the second helium gas is lower than that of the first helium gas, placing the second helium gas pipeline 500 within the heat shield 100 allows it to be directly used as a cold source to cool the heat shield 100, thereby reducing its temperature, ensuring its thermal shielding performance, reducing the impact of the heat load of the first helium gas delivery component 400 on the liquid helium pipeline 320, ensuring the cryogenic transport of liquid helium, and eliminating the need for additional cooling pipelines, thus simplifying the structure of the composite multi-channel multi-medium pipeline 1000.

[0099] It should be noted that the temperature of the second helium gas is 80K (approximately -193.15℃). Specifically, in conjunction with... Figure 1 and Figure 2 As shown, the second helium gas pipeline 500 has two lines, one of which is the second gas supply pipeline and the other is the second gas return pipeline, which facilitates the delivery of 80K helium gas.

[0100] In some embodiments, combined with Figure 1 , Figure 2 and Figure 3As shown, at least a portion of the heat shield 100 is bent to form a fixing groove 120, and the second helium gas pipeline 500 is disposed within the fixing groove 120. The fixing groove 120 reduces the difficulty of connecting the second helium gas pipeline 500 and the heat shield 100, and also increases the contact area between the second helium gas pipeline 500 and the heat shield 100, thereby achieving stable support of the second helium gas pipeline 500 by the heat shield 100.

[0101] In some embodiments, the second helium gas pipeline 500 is inserted into and welded to the fixing groove 120, which can enhance the connection strength between the second helium gas pipeline 500 and the fixing groove 120 and ensure the stability of the second helium gas pipeline 500.

[0102] In a specific example, the cryogenic system application end of the fusion device has multiple core cryogenic pumps. During the entire operation of the cryogenic pumps, 300K gaseous helium is required for the regeneration process, and 80K gaseous helium and 4.2K liquid helium are required for the cooling process. The 80K helium is used to cool the radiation shield and baffles inside the cryogenic pump, and the 4.2K liquid helium is used to cool the adsorption plates inside the cryogenic pump. Based on this, this application sets up a composite multi-channel multi-medium pipeline 1000 that can simultaneously deliver 300K gaseous helium, 80K gaseous helium, and 4.2K liquid helium to meet the cryogenic requirements of the cryogenic system application end of the fusion device.

[0103] In some embodiments, the vacuum pipe 200, liquid helium pipe 320, first gaseous helium pipe 420, and / or second gaseous helium pipe 500 are made of stainless steel. When the vacuum pipe 200 is made of stainless steel, it provides structural strength to accommodate and support internal components of the composite multi-channel multi-medium pipeline 1000 (e.g., the first gaseous helium pipe 420 and the first support 310), while also providing vacuum insulation. When the liquid helium pipe 320 is made of stainless steel, it provides structural strength for stable liquid helium transport. When the first gaseous helium pipe 420 is made of stainless steel, it provides structural strength for stable first gaseous helium transport. When the second gaseous helium pipe 500 is made of stainless steel, it provides structural strength for stable second gaseous helium transport.

[0104] In the specific example, the vacuum pipe 200, the liquid helium pipe 320, the first gas helium pipe 420, and the second gas helium pipe 500 are all made of 304 stainless steel.

[0105] In some embodiments, combined with Figure 1 , Figure 2 and Figure 6As shown, the liquid helium line 320, the first gaseous helium line 420, and the second gaseous helium line 500 are arranged in the same direction. This arrangement can prevent the liquid helium line 320, the first gaseous helium line 420, and the second gaseous helium line 500 from interfering with lines in other directions.

[0106] In specific examples, combined Figure 1 , Figure 2 and Figure 6 As shown, the liquid helium pipeline 320, the first gaseous helium pipeline 420, and the second gaseous helium pipeline 500 are installed at an angle of 45° from the upper left to the lower right to avoid interference between the liquid helium pipeline 320, the first gaseous helium pipeline 420, and the second gaseous helium pipeline 500 and the pipelines in the horizontal and vertical directions, thereby reducing the assembly difficulty of the composite multi-channel multi-media pipeline 1000.

[0107] It should be noted that, for ease of description and a more intuitive understanding of the position of the composite multi-channel multi-medium pipeline 1000, the liquid helium pipeline 320, the first gas helium pipeline 420, and the second gas helium pipeline 500 are described as being installed at a 45° angle from the upper left to the lower right. "Upper left" and "lower right" are simply terms used in conjunction with the description of the pipeline's orientation. Figure 2 The positions of the top, bottom, left, and right sides are consistent, and this orientation expression method is unrelated to the actual installation position of the composite multi-channel multi-media pipeline 1000.

[0108] In some examples, the composite multichannel multi-medium pipeline 1000 for fusion devices has seven pipelines running in parallel. The seven pipelines are a vacuum pipeline 200, two liquid helium pipelines 320, two first gas helium pipelines 420, and two second gas helium pipelines 500. The vacuum pipeline 200 is located in the outermost layer and can contain and support the other six pipelines.

[0109] In the specific assembly process of the composite multi-channel multi-medium pipeline 1000, two liquid helium pipelines 320 can first be wrapped with heat insulation components and installed in the first through hole 311 on the first support 310 to form a liquid helium delivery assembly 300. Then, the liquid helium delivery assembly 300 is installed in the heat shield 100, and the second gas helium pipeline 500 is inserted into the fixing groove 120 of the heat shield 100. The heat shield 100 and the second gas helium pipeline 500 are then welded together. Finally, the first gas helium pipeline 420 is inserted into the second through hole 311 on the second support 410. The first gas-helium delivery assembly 400 is formed in the hole 413. Finally, the heat shield 100, the liquid helium delivery assembly 300 and the first gas-helium delivery assembly 400 are put into the outermost vacuum pipe 200. The second support 410 is fixedly connected to the vacuum pipe 200. The internal liquid helium pipe 320, the first gas-helium pipe 420 and the second gas-helium pipe 500 are adjusted so that the first gas-helium pipe 420, the second gas-helium pipe 500 and the liquid helium pipe 320 are installed and arranged at an angle of 45° from the upper left to the lower right, thus completing the assembly of the composite multi-channel multi-medium pipeline 1000.

[0110] It should be noted that, as Figure 6 As shown, the composite multi-channel multi-medium pipeline 1000 of this application can also be formed into a three-way structure to facilitate the transmission of media.

[0111] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0112] Figure 5 The illustration shows three through holes 4112 on a single second part 412 for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that the solution can be applied to technical solutions with two, four or more through holes 4112, which also falls within the protection scope of this invention.

[0113] Other components of the composite multi-channel multi-medium pipeline 1000 for a fusion device according to embodiments of the present invention, such as the specific structure of the vacuum pipeline 200, are known to those skilled in the art and will not be described in detail here.

[0114] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, 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.

[0115] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A composite multi-channel multi-medium pipeline for a fusion device, characterized in that, include: A heat shield (100) has a hollow interior forming a first accommodating space (110). A vacuum pipe (200) is sleeved on the outer periphery of the heat shield (100) and spaced apart from the heat shield (100). A second accommodating space (210) is formed between the heat shield (100) and the vacuum pipe (200). The heat shield (100) is used to shield the heat transfer between the first accommodating space (110) and the second accommodating space (210). A liquid helium delivery assembly (300) is used to deliver liquid helium. The liquid helium delivery assembly (300) is disposed in the first accommodating space (110) and includes a first support member (310) and a liquid helium pipeline (320). The first support member (310) has four interconnected outer side walls. At least a portion of the four outer side walls are recessed in a direction away from the heat shield (100) so that the four outer side walls of the first support member (310) are all formed as arc-shaped walls. The connection between two adjacent outer side walls is fixedly connected to the heat shield (100). The liquid helium pipeline (320) is disposed in the first support member (310) and is adapted to be filled with liquid helium. A first helium gas delivery assembly (400) is used to deliver a first helium gas. The first helium gas delivery assembly (400) is disposed within the second receiving space (210) and includes a second support member (410) and a first helium gas pipeline (420). The second support member (410) extends circumferentially along the vacuum pipeline (200) and includes a first portion (411) and a second portion (412) that are interconnected. In the circumferential direction of the vacuum pipeline (200), the first portion (411) extends... The extension length is greater than the extension length of the second part (412). One side of the first part (411) and the second part (412) are in contact with and fixedly connected to the vacuum pipe (200). The other side of the first part (411) is fixedly connected to the heat shield (100). The other side of the second part (412) is spaced apart from the heat shield (100). The first gas helium pipe (420) is located in the second part (412). The first gas helium pipe (420) is suitable for being filled with first gas helium.

2. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, The heat shield (100) includes a heat-conducting element, a protective element, and an absorber. The protective element is disposed on the outer periphery of the heat-conducting element and is used to protect the heat-conducting element. The absorber is disposed on the outer periphery of the protective element and is located on the side of the heat shield (100) facing the first accommodating space (110). The absorber is used to absorb the heat transferred to the heat shield (100).

3. The composite multi-channel multi-medium pipeline for fusion devices according to claim 2, characterized in that, The heat-conducting component is a copper component, and a nickel layer is provided on the outer periphery of the copper component to form the protective component. The outer surface of the protective component facing the first accommodating space (110) is provided with black paint to form the absorbent component.

4. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, The liquid helium delivery assembly (300) also includes a heat insulation element, which is fitted around the outer periphery of the liquid helium pipeline (320).

5. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, At least a portion of the liquid helium line (320) forms a flexible tube.

6. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, The first support member (310) and / or the second support member (410) are polytetrafluoroethylene (PTFE) components; And / or, the first support member (310) and / or the second support member (410) are provided with through holes (4112), the through holes (4112) passing through the first support member (310) and / or the second support member (410) along the axial direction of the vacuum pipe (200).

7. The composite multi-channel multi-medium pipeline for fusion devices according to claim 6, characterized in that, The through holes (4112) include a plurality of them, and at least a portion of the through holes (4112) are spaced around the outer periphery of the liquid helium pipeline (320) and / or the first gas helium pipeline (420); At least a portion of the through hole (4112) provided on the first support member (310) is located between the connection between the first support member (310) and the heat shield (100) and the liquid helium pipeline (320).

8. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, The first part (411) is provided with multiple sets of through components (4111), the multiple sets of through components (4111) are arranged radially at intervals along the vacuum pipe (200), each set of through components (4111) includes multiple through holes (4112), the multiple through holes (4112) are arranged circumferentially at intervals along the vacuum pipe (200); In two adjacent sets of the through-hole assemblies (4111), in the radial direction of the vacuum conduit (200), the through hole (4112) of one set of the through-hole assemblies (4111) is directly opposite the gap between two adjacent through holes (4112) of the other set of the through-hole assemblies (4111); The second part (412) is provided with a plurality of through holes (4112), at least some of the through holes (4112) are located between the connection between the first part (411) and the second part (412) and the first gas helium pipeline (420).

9. The composite multi-channel multi-medium pipeline for fusion devices according to claim 1, characterized in that, It also includes a second helium gas pipeline (500) for conveying a second helium gas at a temperature lower than that of the first helium gas, and the second helium gas pipeline (500) is located on the heat shield (100).

10. The composite multi-channel multi-medium pipeline for a fusion device according to claim 9, characterized in that, At least a portion of the heat shield (100) is bent to form a fixing groove (120), and the second gas helium pipeline (500) is disposed in the fixing groove (120).

11. The composite multi-channel multi-medium pipeline for a fusion device according to claim 9, characterized in that, The vacuum pipe (200), the liquid helium pipe (320), the first gaseous helium pipe (420) and / or the second gaseous helium pipe (500) are stainless steel pipes; And / or, the liquid helium line (320), the first gaseous helium line (420) and the second gaseous helium line (500) are arranged in the same direction.

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