CN111933378A - Distributed current and cold mass transmission feeder system of superconducting Tokamak magnet - Google Patents
Distributed current and cold mass transmission feeder system of superconducting Tokamak magnet Download PDFInfo
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- CN111933378A CN111933378A CN202010596547.8A CN202010596547A CN111933378A CN 111933378 A CN111933378 A CN 111933378A CN 202010596547 A CN202010596547 A CN 202010596547A CN 111933378 A CN111933378 A CN 111933378A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
- H01F6/065—Feed-through bushings, terminals and joints
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Abstract
The invention discloses a distributed current and cold mass transmission feeder system of a superconducting Tokamak magnet, which comprises a current lead terminal box, a transition feeder component and an internal feeder component, wherein the current lead terminal box is connected with the internal feeder component through the transition feeder component, the inside of the current lead terminal box is in a vacuum state, and a vacuum partition structure is arranged between the transition feeder component and the current lead terminal box. The feeder line system provided by the invention has a vacuum partition structure, can isolate the vacuum connection between the transition feeder line assembly and the current lead terminal box, does not interfere with each other, can independently complete processing and assembly, can be arranged at the position most suitable for being connected with the corresponding magnet, reduces the assembly difficulty, saves the connection space in the device, can be distributed at different levels of a building according to the layout of the building, and is beneficial to implementing daily maintenance.
Description
The application is a divisional application with the application number of 201810059655.4, the application date of 2018, 1 month and 22 days, and the name of the invention is 'distributed current and cold mass transmission feeder line of a large superconducting Tokamak magnet'.
Technical Field
The invention relates to the technical field of superconducting magnets, in particular to a superconducting Tokamak magnet for a magnetic confinement fusion device, and specifically relates to a distributed current and cold mass transmission feeder system suitable for the superconducting Tokamak magnet.
Background
In a typical superconducting tokamak magnetic confinement fusion device, high-temperature plasma at hundred million ℃ is confined by a ring-shaped strong magnetic field formed by a superconducting magnet and suspended in a vacuum chamber to move along a closed magnetic field line, so that a basic environment of nuclear fusion reaction is formed. In order to obtain a spatial magnetic field with a specific shape, the superconducting Tokamak magnet system is composed of a circumferential field superconducting magnet, a polar field magnet, a central solenoid, a correction field magnet and the like, wherein the superconducting magnets are distributed at different positions of the Tokamak device. During operation, firstly, cold mass with a specific temperature is required to be provided for the superconducting magnet to enable the superconducting material to have superconductivity, then, a specific current is provided for the superconducting magnet by an external power supply system, and finally, a space magnetic field with a specific shape is established. In addition, in order to monitor the operating state of the superconducting magnet, a certain number of sensors for temperature, electric potential and the like are arranged at a certain position of the superconducting magnet, and are led out to a monitoring system through signal measuring wires.
In conventional technical means, the operating current provided to the superconducting magnet and the cold mass provided to the superconducting magnet are generally in a centralized structure form. For the current loop, the power supply system transmits current to the room temperature end of the current lead through the room temperature copper current bar, after heat exchange is carried out through the current lead, the current flows into the terminal of the superconducting magnet through a section of superconducting transmission cable and flows out from the other terminal of the superconducting magnet to be connected to other superconducting magnet terminals, or flows back to the power supply system through another group of superconducting transmission cables, the current lead and the room temperature copper current bar with the same structure to form a complete current transmission loop. As shown in fig. 1, all current leads are integrally mounted in a current lead tank 11, all superconducting transmission cables are integrally mounted in a current transmission line pipe 12, and the current lead tank 11 is in communication with the current transmission line pipe 12 and is finally connected to a superconducting magnet dewar 13. For a cooling loop, cold substances with different temperatures, flow rates and pressures generated by a refrigerator are connected to cooling inlets of different superconducting magnets through a specific matched low-temperature valve and a low-temperature transmission line, the cold substances are cooled and then flow back to the refrigerator to be recovered, all the low-temperature valves are integrally installed in a low-temperature distribution valve box 14, all the low-temperature transmission lines are integrally installed in a low-temperature transmission line pipeline 15, and the low-temperature distribution valve box 14 is communicated with the low-temperature transmission line pipeline 15 and is finally connected with a superconducting magnet Dewar 13.
Although the transmission form of the concentrated current and the cold mass is applied to the superconducting Tokamak magnetic confinement fusion device, the structure is only suitable for the superconducting Tokamak with medium and small size, and the diameter and the height of the device are generally lower than 10 meters. For the superconducting tokamak used by a future fusion reactor, as the diameter and the height of the device reach or exceed 40 meters, and the distance between the superconducting magnet and an external power supply, low temperature and a measurement and control system is long, the centralized current and cold mass transmission can not meet the integral design requirements of a superconducting magnet system and a tokamak device bearing building, and the assembly and maintenance cost is high.
Disclosure of Invention
The invention aims to provide a distributed current and cold mass transmission feeder system suitable for a superconducting Tokamak magnet, which is provided with an independent power supply loop and a cooling loop respectively aiming at each or each group of superconducting magnets in the superconducting Tokamak and comprises necessary signal acquisition channels, wherein the independent feeders can be distributed at any appropriate spatial position around the device according to the number and the positions of the superconducting magnets and the specific layout of a building bearing the superconducting Tokamak; each feeder line runs independently, which means that the power supply and the cooling between superconducting magnets or magnet groups in the Tokamak are not interfered mutually, so that the method effectively reduces the installation difficulty of the feeder line system, powerfully reduces the maintenance cost of the feeder line system, and greatly increases the running stability of the feeder line system.
The purpose of the invention can be realized by the following technical scheme:
a distributed current and cold mass transmission feeder system of a superconducting Tokamak magnet comprises a current lead terminal box, a transition feeder component and an internal feeder component, wherein the current lead terminal box is connected with the internal feeder component through the transition feeder component, the inside of the current lead terminal box is in a vacuum state, and a vacuum partition structure is arranged between the transition feeder component and the current lead terminal box.
Further, the vacuum isolating structure comprises a G10 material partition and a bellows.
Furthermore, the current lead terminal box is a strip-shaped shell made of stainless steel materials, and the ultimate vacuum degree of the current lead terminal box is more than 10-3Pa。
Furthermore, four inner walls of the current lead terminal box are provided with cold shields, the cold shields are made of aluminum materials, and the cold shields are provided with cooling guide pipes and multiple layers of heat insulation layers.
Furthermore, a first central partition plate is arranged in the current lead terminal box, a first low-temperature transmission pipeline and a first diagnosis signal line transmission pipeline are arranged on two sides of the first central partition plate, and the first low-temperature transmission pipeline and the first diagnosis signal line transmission pipeline are arranged on two sides of the first central partition plate in parallel through a plurality of groups of supports.
Furthermore, a high-temperature superconducting current lead, a superconducting joint I and a superconducting cable I are mounted on the central partition plate I, the high-temperature superconducting current lead, the superconducting joint I and the superconducting cable I are fixed on the central partition plate I through a plurality of groups of clamps, the high-temperature superconducting current lead is connected with the superconducting cable I through the superconducting joint I, and the superconducting cable I is S-shaped or U-shaped.
Furthermore, a low-temperature valve component and a pressure relief valve are arranged at the top of the current lead terminal box.
Furthermore, the low-temperature valve assembly comprises control valves which are respectively used for controlling the cold input and output of the cold screen, the cold input and output of the high-temperature superconducting current lead, the cold input and output of the superconducting cable I and the cold input and output of the low-temperature transmission pipeline.
Furthermore, the transition feeder assembly is a long straight cylinder-shaped shell and is made of stainless steel materials, and the transition feeder assembly penetrates through a biological shielding layer of the superconducting Tokamak magnet.
Furthermore, the transition feeder line assembly comprises a second central partition plate, a second low-temperature transmission line and a second diagnosis signal line transmission line are arranged on two sides of the second central partition plate, the second low-temperature transmission line and the second diagnosis signal line transmission line are arranged on two sides of the second central partition plate in parallel, the second low-temperature transmission line is connected with the second low-temperature transmission line, and the second diagnosis signal line transmission line is connected with the first diagnosis signal line transmission line.
Furthermore, the transition feeder assembly further comprises a second superconducting joint and a second superconducting cable, the second superconducting cable is fixed on the second central partition, and the second superconducting cable is connected with the first superconducting cable through the second superconducting joint.
Further, the internal feed line assembly passes through a tokamak dewar wall of the superconducting tokamak magnet and is disposed inside the tokamak dewar wall.
Furthermore, the internal feeder line assembly comprises a third central partition plate, a third low-temperature superconducting transmission pipeline and a third diagnosis signal line transmission pipeline are arranged on two sides of the third central partition plate, the third low-temperature superconducting transmission pipeline and the third diagnosis signal line transmission pipeline are arranged on two sides of the third central partition plate in parallel, the low-temperature superconducting transmission pipeline is connected with the low-temperature transmission pipeline, and the third diagnosis signal line transmission pipeline is connected with the second diagnosis signal line transmission pipeline.
Furthermore, the internal feeder assembly further comprises a third superconducting joint and a third superconducting cable, the third superconducting cable is fixed on the third central partition, and the third superconducting cable is connected with the second superconducting cable through the third superconducting joint.
Furthermore, the end sections of the third superconducting cable, the low-temperature superconducting transmission pipeline and the third diagnosis signal line transmission pipeline are respectively connected with corresponding interfaces in the superconducting Tokamak magnet.
Further, the high-temperature superconducting current lead comprises a room-temperature end, a heat exchanger, a high-temperature superconducting section and a low-temperature superconducting section, the room-temperature end is connected with a power supply busbar, the heat exchanger is connected with the room-temperature end, the high-temperature superconducting section comprises a current divider and a high-temperature superconducting tape, two ends of the current divider are respectively connected with the heat exchanger and the low-temperature superconducting section, the high-temperature superconducting tape is connected with the current divider, and the low-temperature superconducting section is connected with the high-temperature superconducting section.
Further, a plurality of feed lines are distributed around a magnet system of the superconducting Tokamak magnet, the magnet system is composed of a plurality of superconducting coils distributed at specific positions, and each feed line corresponds to one or more superconducting coils.
The invention has the beneficial effects that: the feeder line system provided by the invention has a vacuum partition structure, can isolate the vacuum connection between the transition feeder line assembly and the current lead terminal box, does not interfere with each other, can independently complete processing and assembly, can be arranged at the position most suitable for being connected with the corresponding magnet, reduces the assembly difficulty, saves the connection space in the device, can be distributed at different levels of a building according to the layout of the building, and is beneficial to implementing daily maintenance.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a plan layout view of a prior art centralized feeder device;
FIG. 2 is a diagram of a superconducting Tokamak magnet distributed current and cold mass transfer feeder system configuration;
FIG. 3 illustrates a typical distributed feeder configuration;
FIG. 4 is a cross-sectional view of a current lead termination box in a typical distributed feeder;
FIG. 5 is a cross-sectional view of a transition feed line assembly in a typical distributed feed line;
FIG. 6 is a cross-sectional view of an internal feed line assembly in a typical distributed feed line;
FIG. 7 is a schematic view of a high temperature superconducting current lead configuration;
FIG. 8 is a schematic view of a superconducting joint structure;
fig. 9 is a cross-sectional view of a superconducting joint structure.
Detailed Description
The distributed current and cold mass transfer feeder system of the present invention suitable for large superconducting tokamak magnets is described in detail below with reference to fig. 2 to 9.
Fig. 2 is an example of a complete superconducting tokamak magnet distributed current and cold mass transport feeder system according to the teachings of the present invention. The superconducting Tokamak magnet system 21 is composed of a plurality of superconducting coils distributed at specific positions, a plurality of feeder lines 22 are distributed around the magnet system 21, and each feeder line 22 corresponds to one or more superconducting coils and transmits current, cold and measurement and control signals to the superconducting coils. Compared with the centralized feeder system in fig. 1, the distributed feeder system effectively splits and integrates the current transmission and the cold transmission loop, and does not simply average the dispersion, but makes the optimal combination according to the function, the operating current and the spatial position of the coil according to different types of superconducting magnets. The single feeder 22 has complete functions of power supply, cooling, measurement and diagnosis. The feeder lines 22 do not interfere with each other, processing and assembly can be independently completed, the mounting positions can be arranged at the positions most suitable for being connected with the corresponding magnets, assembly difficulty is reduced, connecting space inside the device is saved, meanwhile, the feeder lines can be distributed on different levels of a building according to the layout of the building, and daily maintenance is facilitated.
Fig. 3 shows a typical single feed line structure example. And a feeder line is led in from the periphery of the Tokamak device and is finally connected with the superconducting magnet coil. The component farthest away from the device in the feeder line is a current lead terminal box 31, the current lead terminal box 31 is a cuboid-shaped shell and is made of stainless steel, and the ultimate vacuum degree can reach 10-3Pa or above. The four walls of the shell are provided with aluminum cold shields 31.1, and the cold shields 31.1 are provided with cooling ducts and multiple layers of heat insulation layers so as to reduce the radiation heat of the external environment to the shell. The flange hole is opened on the shell, two high-temperature superconducting current leads 31.2 are arranged in the current lead terminal box 31 along the flange hole, the high-temperature superconducting current leads 31.2 are electrically connected with a superconducting cable one 31.4 through a superconducting joint one 31.3, and the superconducting cable one 31.4The current lead terminal box 31 is prefabricated in an S-shape or a U-shape to effectively absorb mechanical stress on the superconducting cable 31.4 caused by cooling and operation of the magnet coil. A central clapboard I31.5 is arranged in the current lead terminal box 31, and the high-temperature superconducting current lead 31.2, the superconducting joint I31.3 and the superconducting cable I31.4 are fixed on the central clapboard I31.5 by a plurality of groups of clamps. As shown in fig. 4, the low temperature transmission pipeline 31.6 and the diagnostic signal line transmission pipeline 31.7 are arranged in parallel on both sides of the central partition plate 31.5 through a plurality of groups of supports. The cryogenic valve assembly 31.8 is installed on the top of the current lead terminal box 31, the cryogenic valve assembly 31.8 contains a plurality of groups of cryogenic valves which can respectively control the 80K cold input and output of the cold screen 31.1, the 50K cold input and output of the high-temperature superconducting current lead 31.2, the 4.5K cold input and output of the superconducting cable one 31.4, and the 4.5K cold input and output of the magnet coil cryogenic transmission pipeline 31.6, and meanwhile, in order to ensure the operation safety, a pressure relief valve must be installed. Inwardly along the current lead termination box 31, connected thereto is a transition feed assembly 32. The transition feed line assembly 32 is a long right circular cylinder shaped housing made of stainless steel that passes through the bio-barrier layer 33 of the tokamak device. As shown in fig. 5, the transition feeder assembly 32 includes a second central partition 32.6, a cryogenic transmission line 32.3 and a second diagnostic signal line transmission line 32.4 are disposed on two sides of the second central partition 32.6, and the cryogenic transmission line 32.3 and the second diagnostic signal line transmission line 32.4 are disposed in parallel on two sides of the second central partition 32.6. The transition feeder assembly 32 further comprises a second superconducting joint 32.1 and a second superconducting cable 32.2, and the second superconducting cable 32.2 is fixed on the second central partition 32.6. The first superconducting cable 31.4 extending from the current lead terminal box 31 is connected to the second superconducting cable 32.2 through the second superconducting joint 32.1, the cryogenic transmission pipeline 31.6 is hermetically welded to the cryogenic transmission pipeline 32.3, and the first diagnostic signal line transmission pipeline 31.7 is hermetically welded to the second diagnostic signal line transmission pipeline 32.4. A vacuum isolation structure 32.5 formed by a diaphragm of G10 material and a bellows isolates the vacuum connection between the transition feeder assembly 32 and the current lead termination box 31. Passing inwardly along the transition feed line assembly 32 through the tokamak dewar wall 35 is the inner feed line assembly 34, the inner feed line assembly 34 being sealed within the interior of the tokamak dewar. As shown in FIG. 6, the internal feed line assemblyThe 34 comprises a third central partition 34.5, a low-temperature superconducting transmission pipeline 34.3 and a third diagnostic signal line transmission pipeline 34.4 are arranged on two sides of the third central partition 34.5, and the low-temperature superconducting transmission pipeline 34.3 and the third diagnostic signal line transmission pipeline 34.4 are arranged on two sides of the third central partition 34.5 in parallel. The inner feed line assembly 34 further comprises a superconducting joint three 34.1 and a superconducting cable three 34.2, the superconducting cable three 34.2 being fixed to the central partition three 34.5. The second superconducting cable 32.2 is connected to the third superconducting cable 34.2 through a third superconducting joint 34.1, and the cryogenic transmission line pipe 32.3 and the second diagnostic signal line transmission line 32.4 are connected to the cryogenic superconducting transmission line pipe 34.3 and the third diagnostic signal line transmission line pipe 34.4 through seal welding. The end sections of the third superconducting cable 34.2, the low-temperature superconducting transmission pipeline 34.3 and the third diagnostic signal line transmission pipeline 34.4 are connected with corresponding interfaces in the superconducting Tokamak magnet.
Fig. 7 is a schematic structural view of a high-temperature superconducting current lead according to the present invention, which is suitable for current transmission of over ten thousand amperes. The high-temperature superconducting current lead is an important component for converting room-temperature transmission current into low-temperature transmission current. The room temperature end 41 is connected with a power supply bus bar, the internal heat exchanger adopts a star-shaped laminated design, and the tail end is a 300K gas outlet. The room temperature end 41 is provided with a water cooling and heater system to prevent frost formation during operation. The heat exchanger 42 is of a fin type structure, the width of fins is 3mm, the gaps among the fins are 3mm, the high heat exchange area keeps a good heat exchange effect, and the heat exchanger 42 and the high-precision sleeve are assembled in an interference fit mode and are connected with the room temperature end 41 in a welded mode. The high-temperature superconducting section 43 is composed of a shunt and a high-temperature superconducting tape, the working temperature is 5K-65K, and cooling is carried out through conduction. The shunt bears the supporting function of the high-temperature superconductor, when the superconducting tape enters a resistive state from a superconducting state, the shunt can shunt most of current to prevent the high-temperature superconducting tape from being burnt or overheated, the high-temperature superconducting material is welded on the stainless steel shunt, and two ends of the shunt are respectively welded on the heat exchanger 42 and the low-temperature superconducting section 44. One end of the low-temperature superconducting cable in the low-temperature superconducting section 44 is divided into sub-cables with the same sectional area through the processes of armor cutting and surface nickel layer removing and cable splitting and cable stirring, the sub-cables are welded with the high-temperature superconducting section 43, and the other end of the low-temperature superconducting cable is connected into the joint box after the armor cutting and the surface nickel layer removing.
Fig. 8 is a schematic view showing the structures of superconducting joints one to three, which are important connection parts in the feeder line. The superconducting cables 51 are superconducting cables extending from ends of two large components to be connected for current and cold connection, respectively. As shown in fig. 9, the end of the superconducting cable 51 is subjected to armor cutting and surface nickel layer removal, and then is connected with the joint box 54 formed by processing copper and stainless steel composite plates through crimping and soldering, and after connection is completed, joint box lap joint assembly errors at two ends are actually measured in an assembly field. The assembly tolerances are adjusted by the intermediate plug 58. After filling the four-sided assembly gap with the filler block 55, the U-shaped card 56 is pressed and assembled to the final size, the U-shaped card is welded and then the connector box 54 and the plug 58 are soldered, and the cooling pipe 57 is used for connecting the cold mass passages extending from the ends of the two connector boxes. All connections are completed and externally wrapped with an insulation layer 53 of about 6mm thickness, and finally completed and attached to center spacer one 31.5 using support 52.
In the disclosure, the superconducting transmission feeder mainly plays a role in current and cold transmission to the superconducting magnet, the current enters the inside of the feeder through a high-temperature superconducting current lead at a room temperature end and is transmitted into a superconducting conductor after heat exchange through a current lead, the superconducting conductor is divided into an S-shaped or U-shaped section, a transition feeder section and an inner feeder section, and each section is connected by a superconducting joint and is finally connected to a superconducting magnet coil terminal through the superconducting joint. The path of the cold transmission is consistent with the path of the current transmission. In the superconducting feeder, the high-temperature superconducting current lead can transmit current of ten thousand amperes level from a normal-temperature 300K temperature area to a 4.5K liquid helium temperature area under the condition of high heat exchange efficiency as high as possible. The superconducting joint connects the high-temperature superconducting current lead and the superconducting cable with as low resistance as possible. The superconducting cable can run in a 4.5K temperature zone to transmit current to a superconducting magnet terminal. The low-temperature valve group and the low-temperature transmission pipeline can regulate and control cold mass (helium) with different temperatures, flow rates and pressures, and transmit the cold mass (helium) to a superconducting magnet terminal along the low-temperature transmission pipeline. The diagnosis signal line transmission pipeline can transmit temperature, electric potential and other electric signals for judging the operating state of the superconducting magnet to the data acquisition system through the cable. The cold shield and the vacuum container can bear a high-temperature superconducting current lead, a superconducting joint, a superconducting cable, a low-temperature transmission pipeline and a diagnosis signal line transmission pipeline, and the components can work in a specific high-vacuum environment.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (17)
1. A distributed current and cold mass transmission feeder system of a superconducting Tokamak magnet is characterized by comprising a current lead terminal box (31), a transition feeder component (32) and an internal feeder component (34), wherein the current lead terminal box (31) is connected with the internal feeder component (34) through the transition feeder component (32), the inside of the current lead terminal box (31) is in a vacuum state, and a vacuum partition structure (32.5) is arranged between the transition feeder component (32) and the current lead terminal box (31).
2. A superconducting tokamak magnet distributed current and cold mass transfer feeder system according to claim 1, characterised in that the vacuum insulation structure (32.5) comprises G10 material diaphragms and bellows.
3. A superconducting tokamak magnet distributed current and cold mass transfer feeder system according to claim 1, characterised in that the current lead termination box (31) is an elongated housing made of stainless steel material, the current lead termination box (31) having an ultimate vacuum of more than 10-3Pa。
4. Distributed current and cold mass transport feeder system for superconducting tokamak magnets according to claim 2, characterised in that the four internal walls of the current lead terminal box (31) are provided with cold shields (31.1), the cold shields (31.1) being made of aluminium material, the cold shields (31.1) being provided with cooling ducts and multiple layers of thermal insulation.
5. The distributed current and cold mass transmission feeder system of a superconducting tokamak magnet according to claim 4, wherein a first central baffle (31.5) is arranged in the current lead terminal box (31), a first cryogenic transmission pipeline (31.6) and a first diagnostic signal line transmission pipeline (31.7) are arranged on two sides of the first central baffle (31.5), and the first cryogenic transmission pipeline (31.6) and the first diagnostic signal line transmission pipeline (31.7) are arranged on two sides of the first central baffle (31.5) in parallel through a plurality of groups of supports.
6. A distributed current and cold mass transport feeder system for superconducting Tokamak magnets according to claim 5, wherein a high temperature superconducting current lead (31.2), a superconducting joint I (31.3) and a superconducting cable I (31.4) are mounted on the central partition I (31.5), the high temperature superconducting current lead (31.2), the superconducting joint I (31.3) and the superconducting cable I (31.4) are fixed on the central partition I (31.5) through a plurality of sets of clamps, the high temperature superconducting current lead (31.2) is connected with the superconducting cable I (31.4) through the superconducting joint I (31.3), and the superconducting cable I (31.4) is set to be S-shaped or U-shaped.
7. Distributed current and cold mass transport feeder system of superconducting tokamak magnets according to claim 6, characterized in that the top of the current lead terminal box (31) is provided with a cryogenic valve assembly (31.8) and a pressure relief valve.
8. Distributed current and cold mass transport feeder system for superconducting tokamak magnets according to claim 7, characterised in that the cryogenic valve assembly (31.8) comprises control valves for controlling the cold mass input and output of the cold screen (31.1), the cold mass input and output of the high temperature superconducting current lead (31.2), the cold mass input and output of the superconducting cable one (31.4) and the cold mass input and output of the cryogenic transport pipe (31.6), respectively.
9. A superconducting tokamak magnet distributed current and cold mass transfer feeder system according to claim 1, characterized in that the transition feeder assembly (32) is a long right circular cylinder shaped housing made of stainless steel material, the transition feeder assembly (32) crossing the bio-barrier (33) of the superconducting tokamak magnet.
10. The distributed current and cold mass transport feeder system for superconducting tokamak magnets of claim 9, wherein the transition feeder assembly (32) comprises a second central partition (32.6), a second cryogenic transmission line (32.3) and a second diagnostic signal line transmission line (32.4) are disposed on both sides of the second central partition (32.6), the cryogenic transmission line (32.3) and the second diagnostic signal line transmission line (32.4) are disposed in parallel on both sides of the second central partition (32.6), the cryogenic transmission line (32.3) is connected with the cryogenic transmission line (31.6), and the second diagnostic signal line transmission line (32.4) is connected with the first diagnostic signal line transmission line (31.7).
11. A tocamak magnet superconducting distributed current and cold mass transport feeder system according to claim 10, wherein the transition feeder assembly (32) further comprises a second superconducting joint (32.1) and a second superconducting cable (32.2), the second superconducting cable (32.2) being fixed to the second central partition (32.6), the second superconducting cable (32.2) being connected to the first superconducting cable (31.4) through the second superconducting joint (32.1).
12. A superconducting tokamak magnet distributed current and cold mass transfer feeder system according to claim 1, wherein the internal feeder assembly (34) is disposed inside a tokamak dewar wall (35) of a superconducting tokamak magnet across the tokamak dewar wall (35).
13. The distributed current and cold mass transport feeder system for superconducting tokamak magnets of claim 12, wherein the internal feeder assembly (34) comprises a third central partition (34.5), a third low temperature superconducting transmission line (34.3) and a third diagnostic signal line transmission line (34.4) are disposed on both sides of the third central partition (34.5), the third low temperature superconducting transmission line (34.3) and the third diagnostic signal line transmission line (34.4) are disposed in parallel on both sides of the third central partition (34.5), the low temperature superconducting transmission line (34.3) is connected with the second low temperature transmission line (32.3), and the third diagnostic signal line transmission line (34.4) is connected with the second diagnostic signal line transmission line (32.4).
14. A tocamak magnet superconducting distributed current and cold mass transport feeder system according to claim 13, wherein the inner feeder assembly (34) further comprises a superconducting joint three (34.1) and a superconducting cable three (34.2), the superconducting cable three (34.2) being fixed to the central partition three (34.5), the superconducting cable three (34.2) being connected to the superconducting cable two (32.2) through the superconducting joint three (34.1).
15. A distributed current and cold mass transport feeder system of superconducting tokamak magnets as claimed in claim 14, characterised in that the end sections of the superconducting cable three (34.2), the cryogenic superconducting transport pipe (34.3) and the diagnostic signal line transport pipe three (34.4) are connected with corresponding interfaces in a superconducting tokamak magnet, respectively.
16. The distributed current and cold mass transport feeder system for superconducting tokamak magnets according to claim 6, wherein the high temperature superconducting current lead (31.2) comprises a room temperature end (41), a heat exchanger (42), a high temperature superconducting segment (43) and a low temperature superconducting segment (44), the room temperature end (41) is connected with a power supply bus bar, the heat exchanger (42) is connected with the room temperature end (41), the high temperature superconducting segment (43) comprises a shunt and a high temperature superconducting tape, two ends of the shunt are respectively connected with the low temperature superconducting segment (44) and the heat exchanger (42), the high temperature superconducting tape is connected with the shunt, and the low temperature superconducting segment (44) is connected with the high temperature superconducting segment (43).
17. A distributed current and cold mass transfer feeder system for superconducting tokamak magnets according to claim 1, in which a plurality of feeders (22) are distributed around a magnet system (21) of superconducting tokamak magnets, said magnet system (21) being composed of a plurality of superconducting coils distributed at specific locations, one or more of said superconducting coils corresponding to each of said feeders (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596547.8A CN111933378A (en) | 2018-01-22 | 2018-01-22 | Distributed current and cold mass transmission feeder system of superconducting Tokamak magnet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810059655.4A CN108022712A (en) | 2018-01-22 | 2018-01-22 | The distributed electric current of large-scale superconducting Tokamak magnet and cold matter transmission feeder |
| CN202010596547.8A CN111933378A (en) | 2018-01-22 | 2018-01-22 | Distributed current and cold mass transmission feeder system of superconducting Tokamak magnet |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810059655.4A Division CN108022712A (en) | 2018-01-22 | 2018-01-22 | The distributed electric current of large-scale superconducting Tokamak magnet and cold matter transmission feeder |
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| CN111933378A true CN111933378A (en) | 2020-11-13 |
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| CN202010596547.8A Pending CN111933378A (en) | 2018-01-22 | 2018-01-22 | Distributed current and cold mass transmission feeder system of superconducting Tokamak magnet |
| CN201810059655.4A Pending CN108022712A (en) | 2018-01-22 | 2018-01-22 | The distributed electric current of large-scale superconducting Tokamak magnet and cold matter transmission feeder |
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| CN201810059655.4A Pending CN108022712A (en) | 2018-01-22 | 2018-01-22 | The distributed electric current of large-scale superconducting Tokamak magnet and cold matter transmission feeder |
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| CN114776864A (en) * | 2022-04-25 | 2022-07-22 | 清华大学 | Electric valve and tokamak device with same |
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| CN108573789B (en) * | 2018-06-29 | 2024-04-19 | 宁波健信超导科技股份有限公司 | Fixing device for high-temperature superconductive current lead |
| CN109285647B (en) * | 2018-09-26 | 2019-12-17 | 中国科学院合肥物质科学研究院 | liquid helium soaking type low-temperature superconducting assembly for large-current high-temperature superconducting current lead |
| CN109548361A (en) * | 2018-10-16 | 2019-03-29 | 中国科学院合肥物质科学研究院 | A kind of equipment water-cooling system based on Superconducting tokamak device |
| CN111584180B (en) * | 2020-06-05 | 2021-12-28 | 中国科学院合肥物质科学研究院 | Low-stress safe transmission device between rapid excitation superconducting magnet and current lead |
| CN112530605B (en) * | 2020-11-16 | 2024-02-23 | 中国科学院合肥物质科学研究院 | Vertical device supporting mechanism suitable for ultra-high vacuum and strong radiation conditions |
| CN112466554B (en) * | 2020-11-17 | 2022-05-31 | 中国科学院合肥物质科学研究院 | Low-temperature superconducting cable treatment process for high-current high-temperature superconducting current lead |
| CN116072372B (en) * | 2023-02-22 | 2023-11-07 | 中国科学院合肥物质科学研究院 | Fusion reactor superconducting magnet system based on high-temperature superconductivity |
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| CN108022712A (en) | 2018-05-11 |
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