CN103259233B - A kind of active cooling type room temperature terminal for current feed - Google Patents
A kind of active cooling type room temperature terminal for current feed Download PDFInfo
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- CN103259233B CN103259233B CN201310133941.8A CN201310133941A CN103259233B CN 103259233 B CN103259233 B CN 103259233B CN 201310133941 A CN201310133941 A CN 201310133941A CN 103259233 B CN103259233 B CN 103259233B
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Abstract
The invention discloses a kind of for current feed active cooling type room temperature terminal, include copper terminal, water-cooled pole plate, helium cold core rod, vacuum pumping port, slotted line outlet.Copper terminal arrays through hole is for connecting power supply busbar; Bending water-cooled runner is arranged in water-cooled pole plate and copper terminal faying face side; The wire casing helium flow road of helium cold core rod linear cutter radiating curtain, with the soldering of copper terminal; The outlet of vacuum pumping port, slotted line is connected current feed vacuum chamber with copper terminal inner is communicated with.This Stability Analysis of Structures room temperature terminal temperature & lt; 310K.
Description
Technical field
The present invention relates to the feed line of power supply field of the superconducting magnet of large-scale thermonuclear fusion device or other large-scale calutron, be specially a kind of active cooling type room temperature terminal for current feed.
Background technology
Thermonuclear fusion will provide inexhaustible clean energy resource for the mankind, and International Thermonuclear test reactor (ITER) plan will be built up within Future Ten year.High-temperature superconductive lead wire is powered for its huge cryogenic magnet, be simultaneously magnet main heat load source.
High-temperature superconductive lead wire room temperature terminal connects resistance heat exchanger and power supply busbar, room temperature terminal and busbar are generally bolted, Joule heat in busbar electrical transmission process and connection resistance Joule heat can promote the temperature of room temperature terminal, and the condition of current feed optimal design is room temperature terminal maintenance room temperature ~ 300K, the heat leak to resistance heat exchanger is zero.Therefore keeping current lead terminations to maintain room temperature is ensure that current feed is operated in the condition of Optimal State.
For keeping current lead terminations room temperature, the larger conductive section of general employing, reduces the method for current density.EAST12kA high-temperature superconductive lead wire adopts the milling of major diameter copper bar material to connect planar back surface tining; Because conductive section is limited, during operation 12kA electric current, suction temperature can reach 325K, can estimate that the temperature of room temperature terminal is higher.U.S. FERMILAB research and develop 100kA current feed adopt room temperature terminal be sector to reduce connection resistance density, but the inequality of CURRENT DISTRIBUTION and the trouble of anatomical connectivity technique can be there is in this structure.Chinese Academy of Sciences's plasma does the 52kA high-temperature superconductive lead wire of ITER development when test run, finds that terminal is overheated, needs to take the extraneous water-cooled measure of meeting an urgent need.
Summary of the invention
The object of this invention is to provide a kind of active cooling type room temperature terminal for current feed, to solve prior art Problems existing.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of active cooling type room temperature terminal for current feed, it is characterized in that: include copper terminal, copper terminal sidewall is provided with the through hole of array distribution, copper terminal top is compressed with water-cooled pole plate, the faying face that described water-cooled pole plate is combined with copper terminal is embedded with cooling water pipe, described copper terminal center is provided with and the helium cold core rod that with copper terminal soldering be integrated parallel with water-cooled pole plate, helium cold core rod central coaxial is provided with stainless steel bar, be positioned at helium cold core rod one end and have helium outlet in the end brazing filler metal of copper terminal, room temperature helium after the heat exchange of helium cold core rod is collected and is transferred to cryogenic system by helium outlet.And helium cold core rod one end is connected with and is welded and fixed block on the rod end of stainless steel bar in helium outlet described in the helium cold core rod other end Linear cut multiple tracks spoke-like helium coolant flow channel be distributed in around stainless steel bar, the current feed internal vacuum of central axis and helium cold core rod centerline axis parallel is also provided with in described copper terminal, on the copper terminal end face being positioned at helium outlet place, soldering has the slotted line be communicated with current feed internal vacuum one end accent to export, described slotted line outlet is connected with the vacuum sock for slotted line welding, the copper terminal end face being positioned at helium outlet place has also imbedded multiple heating rod, also include the vacuum pumping port be connected on metal tube, described vacuum pumping port by metal tube along with the direction soldering of current feed internal vacuum central axis upright in copper terminal, and vacuum pumping port is communicated with current feed internal vacuum in copper terminal by metal tube.
Described a kind of active cooling type room temperature terminal for current feed, is characterized in that: the copper terminal other end brazing filler metal not being provided with helium outlet has adpting flange, and this steel flange can link into an integrated entity with the flange assembly bolt of current feed.
Described a kind of active cooling type room temperature terminal for current feed, is characterized in that: the faying face that described water-cooled pole plate is combined with copper terminal is provided with S shape water-cooling groove, and described cooling water pipe is embedded in water-cooling groove with the shape of mating with water-cooling groove.
Described a kind of active cooling type room temperature terminal for current feed, it is characterized in that: in described copper terminal top-portion apertures, imbedded multiple swivel nut, described water-cooled pole plate by multiple be connected swivel nut one to one bolt presses be fixed on copper terminal top, and each bolt top bolt along and water-cooled pole plate between be respectively equipped with the pressure that elastomeric pad and flat shim keep pole plate.
Work of the present invention is applicable to low temp. electric physical unit, is the terminal structure of the indoor temperature end of current feed, connects power supply busbar and resistance heat exchanger.The present invention has good using value in fusion reactor field and superconductivity.
In fact, as long as be desirably in large-current electric link and wish maintaining member temperature, avoid too high or too low for temperature, can with reference to technical scheme of the present invention, in every case be the content not departing from technical scheme of the present invention, only the simple modification of described structure being carried out according to technical spirit of the present invention, or equal change with modify, within the scope that all should belong to technical solution of the present invention.
Advantage of the present invention is:
Structure of the present invention is simple, and heat exchange coefficient is high, without the need to extra coolant, can avoid simultaneously overheated with cross cold junction ice.This active cooling type room temperature terminal can maintain room temperature terminal temperature <310K.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is water-cooling structure schematic diagram of the present invention.
Fig. 3 is helium air-cooled structure sectional view of the present invention.
Embodiment
As shown in Figure 1-Figure 3.A kind of active cooling type room temperature terminal for current feed, include copper terminal 8, copper terminal 8 sidewall is provided with the through hole 18 of array distribution, copper terminal 8 top is compressed with water-cooled pole plate 6, water-cooled pole plate 6 and the faying face of copper terminal 8 are embedded with cooling water pipe 1, copper terminal 8 center is provided with helium cold core rod 12 that is parallel with water-cooled pole plate 6 and that be integrated with copper terminal 8 soldering, helium cold core rod 12 central coaxial are provided with stainless steel bar 11, be positioned at helium cold core rod 12 one end and have helium outlet 16 in copper terminal 8 end brazing filler metal, room temperature helium after 12 heat exchange of helium cold core rod is collected and is transferred to cryogenic system by helium outlet 16.And helium cold core rod 12 one end are to the spoke-like helium coolant flow channel be distributed in around stainless steel bar 11 of helium cold core rod 12 other end Linear cut multiple tracks, the rod end of stainless steel bar 11 in helium outlet 16 is connected with and is welded and fixed block 13, the current feed internal vacuum 20 of central axis and helium cold core rod 12 centerline axis parallel is also provided with in copper terminal 8, on copper terminal 8 end face being positioned at helium outlet 16 place, soldering has the slotted line be communicated with current feed internal vacuum 20 one end accent to export 14, slotted line outlet 14 is connected with the vacuum sock 15 for slotted line welding, copper terminal 8 end face being positioned at helium outlet 16 place has also imbedded multiple heating rod 17, also include the vacuum pumping port 9 be connected on metal tube 10, vacuum pumping port 9 by metal tube 10 along the direction soldering with current feed internal vacuum 20 central axis upright in copper terminal 8, and vacuum pumping port 9 is communicated with current feed internal vacuum 20 in copper terminal 8 by metal tube 10.
Be positioned at copper terminal 8 other end, the one end not namely being provided with helium outlet 16 is set with adpting flange 7, and adpting flange can be connected with current feed flange assembly.
The faying face that water-cooled pole plate 6 is combined with copper terminal 8 is provided with S shape water-cooling groove, and cooling water pipe 1 is connected to be embedded in soldering in water-cooling groove with the shape that water-cooling groove mates.
Multiple swivel nut 5 has been imbedded in copper terminal 8 top-portion apertures, water-cooled pole plate 6 by multiple be connected swivel nut 5 one to one bolt 2 be pressed abd fixed on copper terminal 8 top, and each bolt 2 top bolt along and water-cooled pole plate 6 between be respectively equipped with elastomeric pad 3 and keep pressure with flat shim 4 pairs of water-cooled pole plates.
See Fig. 2, in the present invention, water-cooled pole plate 6 soldering imbedded by cooling water pipe 1 after bending to serpentine, and water-cooled pole plate 6 is fixed in copper terminal 8 by bolt 2, pad 3,4 and swivel nut 5; See Fig. 3, helium cold core rod 12 Linear cut helium coolant flow channels, center is blocked by stainless steel bar 11, and one is welded and fixed block 13, and plug 12 vacuum brazing is in copper terminal 8; See Fig. 1, be communicated with the internal vacuum of current feed after being brazed in copper terminal 8 after vacuum pumping port 9 argon arc is welded in pipe 10; Also be communicated with the internal vacuum of current feed after slotted line outlet 14 is brazed in copper terminal, slotted line outlet 14 is tightly connected with vacuum sock 15 sealing ring, and slotted line is welded in vacuum sock, and a pair heating rod 17 is imbedded in copper terminal 18.
In the present invention, room temperature terminal outside connects water-cooled pole plate, inner soldering helium cold core rod.Described room temperature terminal, namely copper terminal has the large plane of bilateral, and the through hole of array runs through terminal, and power supply busbar and copper terminal are bolted, large-area joint and strength bolt be connected with the reduction being beneficial to connection resistance.Described water-cooled pole plate is connected by bolt presses with copper terminal, and bending water-cooling groove is arranged in water-cooled pole plate and copper terminal faying face side, and stainless steel waterpipe soldering is in water-cooled pole plate.Water-cooled pole plate also adopts the copper that thermal conductivity is good, logical circulating cooling deionized water in water pipe, and the deionized water by constantly circulation is taken away by copper terminal Joule heat; When terminal temperature is too low, cold also can be taken away by the deionized water of circulation simultaneously, copper terminal is avoided to cross cold junction ice, to freeze for room temperature terminal under handling failure state or under microthermal climate, system is in water ice formation issues after non-operating state, room temperature terminal is imbedded heating rod and is carried out deicing in advance, and safeguards system is run.The wire casing helium flow road of described helium cold core rod linear cutter radiating curtain, center is by stainless steel bars shutoff, helium cold core rod and the soldering of copper terminal, the helium suction temperature of heat exchange was carried out generally still lower than the temperature of copper terminal by current feed resistance heat exchanger during normal operation, the helium flow road of copper terminal will carry out heat exchange with relatively low helium return-air further, because the wire casing gap of Linear cut is narrow, minimum to 0.2mm, therefore the hydraulic diameter of runner is very low, is conducive to the raising of heat exchange coefficient.Described vacuum pumping port and the soldering of copper terminal, vacuum pumping port is communicated with the internal vacuum of current feed, by switch valve fastens maintenance vacuum after vacuumizing before normal operation to inside.Described slotted line outlet is also communicated with the internal vacuum of current feed, namely current feed internal cavities is vacuum passage is also slotted line passage, slotted line outlet is tightly connected with vacuum sock sealing ring, slotted line is welded in vacuum sock, two vacuum sock use respectively as being normally used in backup, can switch to backup socket in time when finding that there is signals collecting and being abnormal.
Claims (4)
1. the active cooling type room temperature terminal for current feed, it is characterized in that: include copper terminal, copper terminal sidewall is provided with the through hole of array distribution, copper terminal top is compressed with water-cooled pole plate, the faying face that described water-cooled pole plate is combined with copper terminal is embedded with cooling water pipe, described copper terminal center is designed with and the helium cold core rod that with copper terminal soldering be integrated parallel with water-cooled pole plate, helium cold core rod central coaxial is provided with stainless steel bar, be positioned at helium cold core rod one end and have helium outlet in the end brazing filler metal of copper terminal, room temperature helium after the heat exchange of helium cold core rod is collected and is transferred to cryogenic system by helium outlet,
Helium cold core rod one end is to the spoke-like helium coolant flow channel be distributed in around stainless steel bar of helium cold core rod other end Linear cut multiple tracks, described stainless steel bar is connected with at this end of helium outlet and is welded and fixed block, the current feed internal vacuum of central axis and helium cold core rod centerline axis parallel is also provided with in described copper terminal, on the copper terminal end face being positioned at helium outlet place, soldering has the slotted line be communicated with current feed internal vacuum one end accent to export, described slotted line outlet is connected with the vacuum sock for slotted line welding, the copper terminal end face being positioned at helium outlet place has also imbedded multiple heating rod, this terminal also includes the vacuum pumping port be connected on metal tube, described vacuum pumping port by metal tube along with the direction soldering of current feed internal vacuum central axis upright in copper terminal, and vacuum pumping port is communicated with current feed internal vacuum in copper terminal by metal tube.
2. a kind of active cooling type room temperature terminal for current feed according to claim 1, is characterized in that: the copper terminal other end not being provided with helium outlet is set with adpting flange.
3. a kind of active cooling type room temperature terminal for current feed according to claim 1, it is characterized in that: the faying face that described water-cooled pole plate is combined with copper terminal is provided with S shape water-cooling groove, and described cooling water pipe is embedded in water-cooling groove with the shape of mating with water-cooling groove.
4. a kind of active cooling type room temperature terminal for current feed according to claim 1, it is characterized in that: in multiple holes at described copper terminal top, imbedded swivel nut, described water-cooled pole plate by multiple with swivel nut one to one bolt presses be fixed on copper terminal top, and each bolt top bolt along and water-cooled pole plate between be respectively equipped with elastomeric pad and flat shim.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310133941.8A CN103259233B (en) | 2013-04-17 | 2013-04-17 | A kind of active cooling type room temperature terminal for current feed |
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| CN201310133941.8A CN103259233B (en) | 2013-04-17 | 2013-04-17 | A kind of active cooling type room temperature terminal for current feed |
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| CN103259233A CN103259233A (en) | 2013-08-21 |
| CN103259233B true CN103259233B (en) | 2016-04-06 |
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| CN103545775B (en) * | 2013-10-23 | 2016-01-20 | 何先进 | A kind of air suction type electric cable cooling system |
| CN105548248B (en) * | 2015-12-12 | 2018-03-16 | 西安交通大学 | A kind of assembling structure that miniature scale test specimen is installed in pipe |
| CN106449005A (en) * | 2016-09-27 | 2017-02-22 | 中国科学院合肥物质科学研究院 | Liquid nitrogen forced flow cooling type heat exchanger assembly of current lead |
| CN106971807B (en) * | 2017-05-04 | 2018-06-05 | 中国科学院合肥物质科学研究院 | A kind of large scale superconducting magnet current feed high efficiency assembly type heat exchanger structure |
| CN107221356A (en) * | 2017-05-09 | 2017-09-29 | 中国科学院合肥物质科学研究院 | Suitable for the closed-loop recirculatory mixing wastewater with air cooling system of fusion reactor hot environment |
| CN107611895A (en) * | 2017-10-24 | 2018-01-19 | 镇江市益宝电气科技有限公司 | A kind of air cooling combination water-cooled high efficiency and heat radiation bus duct for Internet of Things |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080087A (en) * | 1992-06-09 | 1993-12-29 | 中国科健有限公司 | Plugable coaxial air cooling current lead for superconductive magnet |
| US6049036A (en) * | 1995-12-21 | 2000-04-11 | Metra; Piero | Terminal for connecting a superconducting multiphase cable to a room temperature electrical equipment |
| CN1873847A (en) * | 2006-05-25 | 2006-12-06 | 中国科学院等离子体物理研究所 | Cold end of heavy current lead out wire made from high-temperature superconductor, and low resistance connector of superconducting transmission line |
| CN101740887A (en) * | 2009-10-23 | 2010-06-16 | 中国科学院等离子体物理研究所 | Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger |
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2013
- 2013-04-17 CN CN201310133941.8A patent/CN103259233B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080087A (en) * | 1992-06-09 | 1993-12-29 | 中国科健有限公司 | Plugable coaxial air cooling current lead for superconductive magnet |
| US6049036A (en) * | 1995-12-21 | 2000-04-11 | Metra; Piero | Terminal for connecting a superconducting multiphase cable to a room temperature electrical equipment |
| CN1873847A (en) * | 2006-05-25 | 2006-12-06 | 中国科学院等离子体物理研究所 | Cold end of heavy current lead out wire made from high-temperature superconductor, and low resistance connector of superconducting transmission line |
| CN101740887A (en) * | 2009-10-23 | 2010-06-16 | 中国科学院等离子体物理研究所 | Connecting part used between high-temperature superconducting segment of heavy current lead and resistance heat exchanger |
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| CN103259233A (en) | 2013-08-21 |
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Address after: 230001 no.181 Gucheng Road, shiyangang Township, Hefei City, Anhui Province Patentee after: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES Address before: 230031 Shushan Lake Road, Shushan District, Anhui, China, No. 350, No. Patentee before: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES |
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