CN110066973A - Large-scale Nb3Sn coil is heat-treated multistage temperature equalization system and its temperature control method - Google Patents
Large-scale Nb3Sn coil is heat-treated multistage temperature equalization system and its temperature control method Download PDFInfo
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- CN110066973A CN110066973A CN201910248386.0A CN201910248386A CN110066973A CN 110066973 A CN110066973 A CN 110066973A CN 201910248386 A CN201910248386 A CN 201910248386A CN 110066973 A CN110066973 A CN 110066973A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention discloses a kind of large size Nb3Sn coil is heat-treated multistage temperature equalization system and its temprature control method, includes other associated components such as calandria, level-one samming tank, second level samming cylinder, three-level samming cover, blower subsystem, PLC control cabinet.The temperature control method includes following several stages: the 1. temperature rise period, it is desirable that coil heating rate is 5 DEG C/h, and temperature uniformity is within ± 10 DEG C；2. holding stage, it is desirable that the temperature uniformity of each heat preservation platform coil is within ± 5 DEG C.3. temperature-fall period, it is desirable that coil rate of temperature fall is 5 DEG C/h, furnace cooling after being down to 500 DEG C.The invention has the advantages that system is reliable, cost performance is high.Suitable for handling outer diameter 1-3m, high 0.5-4 meters of large-scale Nb3Sn coil.Effectively coil heat treatment temperature can be controlled, reachable ± 1 DEG C of the holding stage coil temperature uniformity, while solve the problems, such as coil surface oxidation, improve the superconductivity of magnet coil.
Description
Technical field
The present invention relates to large-scale Nb3Sn CICC superconducting coil technical field of heat treatment more particularly to a kind of large size Nb3Sn line
Circle is heat-treated multistage temperature equalization system and its temperature control method, improves the temperature uniformity and temperature-controlled precision of heat treatment heat preservation platform, together
When solve the problems, such as coil be heat-treated surface oxidation, melanism.It is related to the temperature control of a kind of high-precision, high-efficiency, high reliability
Method.
Background technique
CFETR is to run multiple tokamak such as EAST as experience, and based on ITER is added, that designs and build is poly-
Journey of exchanging work experimental reactor.Superconducting magnet is the key core system of CFETR, and CFETR Centric solenoid modal coil interior loop uses Nb3Sn material system
Solenoid superconducting magnet in center made of making.Nb3Sn coil needs solid to occur by certain heat treatment after coiling molding
State diffusion reaction, to generate A15 superconducting phase.Heat treatment is Nb3The key technology of Sn superconducting coil manufacture, the quality of heat treatment
It will directly determine the superconductivity of the following coil.
Nb3The temperature and time of Sn superconducting coil heat treatment, the two factors are to Nb3The superconductivity of Sn plays most important
Effect.Coil heat treating regime is heating rate: 5 DEG C/h, rate of temperature fall DEG C/h is cooling with furnace temperature after dropping to 500 degree；It closes
Key keeps the temperature section: 210 DEG C keep the temperature 50 hours, and 340 DEG C keep the temperature 25 hours, and 450 DEG C keep the temperature 25 hours, and 575 DEG C keep the temperature 100 hours,
650 DEG C keep the temperature 100 hours.Temperature rise period, it is desirable that coil temperature uniformity is within ± 10 DEG C；Holding stage, it is desirable that each heat preservation
The temperature uniformity of platform coil is within ± 5 DEG C.
210 DEG C keep the temperature 50 hours, and main function is the process of the diffusion reaction production bronze of tin；340 DEG C keep the temperature 25 hours,
Main function is that reaction is avoided to generate Cu41Sn11, 450 DEG C keep the temperature 25 hours, and main function is conductor degassing, help to reduce magnetic
Stagnant loss, 575 DEG C keep the temperature 100 hours, and main function, which is that tin is more uniform, to be diffused into niobium, and 650 DEG C keep the temperature 100 hours, main
Act on is to generate Nb3Sn superconducting phase.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides a kind of large size Nb3The heat treatment of Sn coil is multistage
Temperature equalization system and its temperature control method.
The present invention is achieved by the following technical solutions:
A kind of large size Nb3Sn coil is heat-treated multistage temperature equalization system, includes level-one samming tank, second level samming cylinder, three-level samming
Cover and PLC control cabinet are disposed with resistive heater, the fixed peace in the upper end of level-one samming tank in the inner wall of the level-one samming tank
Equipped with blower, the lower end of level-one samming tank is welded with furnace base, and the upper end closure lower end of the second level samming cylinder is open, second level
Samming cylinder is located on the inside of level-one samming tank, and the outer wall of second level samming cylinder is fixedly connected with the inner wall of level-one samming tank using screw rod,
The impeller of the blower is located in the upper end interlayer of level-one samming tank and second level samming cylinder, and the three-level samming cover is located at two
On the inside of grade samming cylinder, it is equipped with supporting leg in the upper surface of described furnace base, the three-level samming cover is placed on the upper surface of supporting leg,
It is additionally provided with coil heat-conducting padding plate between supporting leg and three-level samming cover, magnet coil is equipped in three-level samming cover, in three-level
The upper surface of samming cover is equipped with samming cover gas outlet and coil upper end protects chamber, is equipped on the top of coil upper terminal protection chamber
Coil is vented reserved opening, is equipped with samming cover air inlet, coil lower terminal protection chamber and samming cover in the lower end surface of three-level samming cover
Thermocouple provided pipe is equipped with coil air inlet reserved opening in the lower end of lower terminal protection chamber, in the lower end of the level-one samming tank
It is reserved with three-level samming cover air inlet pipe, coil air inlet pipe, three-level samming cover escape pipe, coil escape pipe, samming canister incoming gas pipe,
The upper end of level-one samming tank is equipped with samming tank escape pipe, the three-level samming cover air inlet pipe, coil air inlet pipe, three-level samming cover
Escape pipe and coil escape pipe are pre- with the exhaust of samming cover air inlet, coil air inlet reserved opening, samming cover gas outlet and coil respectively
It stays mouth to connect, samming cover thermocouple provided pipe is additionally provided in the lower end surface of the three-level samming cover, in the magnet coil
Surface layout multiple coil thermocouples, the coil thermocouple be to be penetrated out of described samming cover thermocouple provided pipe
's；It is disposed with samming cover thermocouple in the three-level samming cover inner wall, the PLC control cabinet controls adding thermal resistance respectively
The work of silk, blower and samming cover thermocouple is disposed with upper area's temperature-controlling thermal couple on the coil upper end protection chamber, three
The inner sidewall middle position of grade samming cover is disposed with middle area's temperature-controlling thermal couple, is disposed with bottom area temperature control on coil lower terminal protection chamber
Thermocouple is separately installed with upper area's temperature control table, upper area's temperature control table and upper area's temperature control table in PLC control cabinet, on
Area's temperature control table, upper area's temperature control table and upper area's temperature control table control area's temperature-controlling thermal couple, middle area's temperature-controlling thermal couple respectively
With the work of bottom area temperature-controlling thermal couple.
The level-one samming tank using cylindrical stainless steel tank body, tank body upper end and blower cover board using welding manner into
Row sealing, tank body lower end and furnace base are sealed using welding manner；Tank body is divided into Shang Qu, Zhong Qu and bottom area, each
Area is arranged with resistive heater.
The second level samming cylinder uses stainless steel cylindrical tube, between second level samming drum outer wall and level-one samming top tank structure
Interlayer distance be 25-80cm.
The three-level samming cover is the ring-shaped cylinder body cavity that upper and lower end face is had made of stainless sheet steel, in three-level
The center of samming cover is equipped with ventilating duct, and the inside and outside side wall of three-level samming cover is all made of ripple struction.
Multiple reinforcing ribs are welded in the side of the three-level samming cover.
A kind of large size Nb3Sn coil is heat-treated the temprature control method of multistage temperature equalization system, the specific steps are as follows:
210 DEG C of heating curves are arranged in A on temperature control table, and heating rate uses 10-15 DEG C/h, and fan operation frequency is 30-
50Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
210 DEG C of keeping temprature curves are arranged in B on temperature control table, when coil magnet samming reaches 200 DEG C, stop heating, to three
When grade samming case temperature reaches 210 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited in 20KW, heat preservation
Time is set as 3000min, and fan operation frequency is 10-15Hz；
340 DEG C of heating curves are arranged in C on temperature control table, and heating rate uses 9-13 DEG C/h, and fan operation frequency is 28-
40Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
340 DEG C of keeping temprature curves are arranged in D on temperature control table, when coil magnet samming reaches 333 DEG C, stop heating, to three
When grade samming cover temperature reaches 340 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 24KW, are protected
The warm time is set as 1500min, and fan operation frequency is 10-15Hz；
450 DEG C of heating curves are arranged in E on temperature control table, and heating rate uses 8-10 DEG C/h, and fan operation frequency is 25-
30Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
450 DEG C of keeping temprature curves are arranged in F on temperature control table, when coil magnet samming reaches 445 DEG C, stop heating, to three
When grade samming cover temperature reaches 341 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 28KW, are protected
The warm time is set as 1500min, and fan operation frequency is 5-10Hz；
575 DEG C of heating curves are arranged in G on temperature control table, and heating rate uses 6-9 DEG C/h, and fan operation frequency is 18-
24Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
575 DEG C of keeping temprature curves are arranged in H on temperature control table, when magnet samming reaches 571 DEG C, stop heating, equal to three-level
When warm cover temperature reaches 570 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 30KW, when heat preservation
Between be set as 6000min, blower is out of service；
650 DEG C of heating curves are arranged in I on temperature control table, and heating rate uses 6-8 DEG C/h, and fan operation frequency is 10-
20Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
650 DEG C of keeping temprature curves are arranged in J on temperature control table, when magnet samming reaches 648 DEG C, stop heating, equal to three-level
When warm cover temperature reaches 570 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 35KW, when heat preservation
Between be set as 6000min, blower is out of service；
Temperature lowering curve is arranged in K on temperature control table, and rate of temperature fall uses 5 DEG C/h, and fan operation frequency is 5-10Hz, to magnetic
When temperature is down to 500, stops heating, blowing-out machine, cooled down.
The system include calandria, level-one samming tank, second level samming cylinder, three-level samming cover, blower, PLC control cabinet etc. its
His associated components.
Large-scale Nb3The heat treatment of Sn coil is suitable for processing outer diameter 1-3m using well formula resistance furnace, high 0.5-4 meters
Large-scale Nb3Sn coil.The furnace lining of well formula resistance furnace is filled with heat-preservation cotton and is thermally shielded.
Heat-treatment furnace calandria is divided into three areas: Shang Qu, Zhong Qu and bottom area.The resistance that each area is evenly arranged 100KW adds
Heated filament.
Level-one samming tank is located on the inside of calandria using cylindrical stainless steel tank body.Tank body upper end and blower cover board
It is sealed using welding manner, tank body lower end and furnace base are sealed using welding manner.
Second level samming cylinder is located on the inside of level-one samming tank using stainless steel cylinder barrel.Second level samming drum outer wall
It is connect with level-one samming top tank structure using screw rod, intermediate course distance is 25-80cm.Ensure that atmosphere can be followed in intermediate course
Ring.
The annular space that three-level samming cover is designed by stainless sheet steel according to magnet shape.Three-level samming cover is put in furnace base
Supporting leg on, magnet coil is located in three-level samming cover.
Blower subsystem is located at furnace body upper end, and draught fan impeller is located at level-one samming tank and second level samming cylinder upper end intermediate course
It is interior.
The effect of PLC control cabinet is setting in-furnace temperature curve, and limit value calandria heating power adjusts fan operation frequency
Rate (adjustable in 0-50Hz).
Three stainless steel supporting legs are placed on furnace base.Reserve protective gas admission line, outlet pipe and heat in furnace bottom area
Galvanic couple arranges pipeline.
Three-level samming cover can reserve multiple protective gas import and exports.The scheme that this specification schematic diagram uses is that three-level is equal
A samming cover protective gas air inlet is reserved in temperature cover lower end surface, reserves a thermocouple deployment tube；Coil lower terminal protects chamber
Reserve a coil protective gas air inlet in end face；Reserve a samming cover protective gas gas outlet in three-level samming cover upper surface.
The rigidity that multiple reinforcing ribs guarantee samming cover is welded in three-level samming cover side.
Coil surface arranges multiple thermocouples, thus the Temperature Distribution of detection coil.Coil thermocouple is from samming cover
What preserved pipeline penetrated, pipe ends are shut to the leakproofness for guaranteeing samming cover after the completion of coil thermocouple arrangement.
The area PLC control cabinet Shang Youshang, Zhong Qu and the three deblocking temperature control table of bottom area respectively correspond the control of Shang Qu, Zhong Qu and bottom area
Warm galvanic couple.
The invention has the advantages that present system is reliable, cost performance is high, it is suitable for processing outer diameter 1-3m, high 0.5-4 meters
Large-scale Nb3Sn coil can effectively control coil heat treatment temperature, and the holding stage coil temperature uniformity is reachable ±
1 DEG C, while solving the problems, such as coil surface oxidation, improve the superconductivity of magnet coil.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is three-level samming cover structure figure of the present invention.
Specific embodiment
As shown in Figure 1, 2, a kind of large size Nb3Sn coil is heat-treated multistage temperature equalization system, includes level-one samming tank 4, two
Grade samming cylinder 14, three-level samming cover 11 and PLC control cabinet, are disposed with resistive heater in the inner wall of the level-one samming tank 4
6, the upper end of level-one samming tank 4 is fixedly installed with blower 1, and the lower end of level-one samming tank 4 is welded with furnace base 7, the second level
The upper end closure lower end of samming cylinder 14 is open, and second level samming cylinder 14 is located at 4 inside of level-one samming tank, the outer wall of second level samming cylinder 14
It is fixedly connected with the inner wall of level-one samming tank 4 using screw rod, the impeller 2 of the blower 1 is located at level-one samming tank 4 and second level is equal
In the upper end interlayer of warm cylinder 14, the three-level samming cover 11 is located at 14 inside of second level samming cylinder, in the upper of the furnace base 7
Face is equipped with supporting leg 16, and the three-level samming cover 11 is placed on the upper surface of supporting leg 16, in supporting leg 16 and three-level samming cover 11
Between be additionally provided with coil heat-conducting padding plate 15, in three-level samming cover 11 be equipped with magnet coil 13, in the upper end of three-level samming cover 11
Face is equipped with samming cover gas outlet 24 and coil upper end protects chamber 22, is equipped with coil row on the top of coil upper terminal protection chamber 22
Gas reserved opening 21 is equipped with samming cover air inlet 3, coil lower terminal protection chamber 5 and samming cover in the lower end surface of three-level samming cover 11
Thermocouple provided pipe 29 is equipped with coil air inlet reserved opening 28 in the lower end of lower terminal protection chamber 5, in the level-one samming tank 4
Lower end be reserved with three-level samming cover air inlet pipe 8, coil air inlet pipe 9, thermocouple deployment tube 10, three-level samming cover escape pipe 17,
Coil escape pipe 18 and samming canister incoming gas pipe 19 are equipped with samming tank escape pipe 20, the three-level in the upper end of level-one samming tank 4
Samming cover air inlet pipe 8, coil air inlet pipe 9, three-level samming cover escape pipe 17 and coil escape pipe 18 respectively with samming cover air inlet
3, coil air inlet reserved opening 28, samming cover gas outlet 24 and coil exhaust reserved opening 21 connect, in the three-level samming cover 11
Lower end surface be additionally provided with samming cover thermocouple provided pipe 29, in the multiple coil thermoelectricity of surface layout of the magnet coil 13
Even 23, the coil thermocouple 23 is penetrated out of described samming cover thermocouple provided pipe 29；It is equal in the three-level
Temperature 11 inner walls of cover are disposed with samming cover thermocouple 31, and the PLC control cabinet controls resistive heater 6, blower 1 and samming respectively
The work of cover thermocouple 31 is disposed with upper area's temperature-controlling thermal couple 27 on the coil upper end protection chamber 22, in three-level samming
The inner sidewall middle position of cover 11 is disposed with middle area's temperature-controlling thermal couple 25, is disposed with bottom area temperature control on coil lower terminal protection chamber 5
Thermocouple 30 is separately installed with upper area's temperature control table, upper area's temperature control table and upper area's temperature control table in PLC control cabinet,
Upper area's temperature control table, upper area's temperature control table and upper area's temperature control table control area's temperature-controlling thermal couple 27, middle area's temperature control respectively
The work of thermocouple 25 and bottom area temperature-controlling thermal couple 30.
The level-one samming tank 4 utilizes welding manner using cylindrical stainless steel tank body, tank body upper end and blower cover board
It is sealed, tank body lower end and furnace base are sealed using welding manner；Tank body is divided into Shang Qu, Zhong Qu and bottom area, every
A area is arranged with resistive heater 6.
The second level samming cylinder 14 uses stainless steel cylindrical tube, second level samming drum outer wall and level-one samming top tank structure it
Between interlayer distance be 25-80cm.
The three-level samming cover 11 is the ring-shaped cylinder body cavity that upper and lower end face is had made of stainless sheet steel, three
The center of grade samming cover is equipped with ventilating duct 12, and the inside and outside side wall of three-level samming cover 11 is all made of ripple struction.
Multiple reinforcing ribs 26 are welded in the side of the three-level samming cover 11.
Level-one samming tank 4 is located at 6 inside of calandria using stainless steel material using cylindrical tank.Tank body
Upper end is sealed with blower cover board using welding manner, and tank body lower end is sealed in furnace base 7 using welding manner.Second level
Samming cylinder 14 is located at 4 inside of level-one samming tank using stainless steel cylinder barrel.14 outer wall of second level samming cylinder and level-one are equal
Warm 4 inner wall of tank is connected using screw rod, and intermediate course distance is 30cm.Ensure that atmosphere can recycle in intermediate course.Three-level samming
The annular space that cover 11 is designed by stainless sheet steel according to magnet shape.Three-level samming cover 11 is put in the supporting leg 16 of furnace base
On, magnet coil 13 is located in three-level samming cover 11.Three-level samming cover 11, which is characterized in that its inside and outside side wall is using wave
The purpose of line structure is enhancing heat exchanger effectiveness.It welds coil upper end and protects chamber 22 in the upper surface of samming cover；Samming cover 11
Lower end surface weld coil lower terminal and protect chamber 5.Coil terminals protection chamber is shape and the position according to the upper and lower terminal of coil
Designed by shape.Three-level samming cover 11 can reserve multiple protective gas import and exports.The scheme that this specification schematic diagram uses is three
A samming cover protective gas air inlet 3 is reserved in grade samming cover lower end surface,；Coil lower terminal protects 5 end face of chamber to reserve a line
Enclose protective gas air inlet 27；Reserve a samming cover protective gas gas outlet 21 in three-level samming cover upper surface.Three-level samming cover
11, it is characterised in that welded the rigidity that multiple reinforcing ribs 26 guarantee samming cover in the side.Three-level samming cover 11, it is characterised in that
Three-level samming cover surface can arrange multiple thermocouples 31, and wherein coil upper end protection chamber 22 arranges area on a calandria and controls
Thermocouple temperature 27, samming cover inner sidewall middle position arrange area's temperature-controlling thermal couple 25 in a calandria, and coil lower terminal protects chamber 5
Arrange calandria bottom area temperature-controlling thermal couple 30.Three-level samming cover 11 is located on supporting leg 16, and coil heat-conducting padding plate 15 is located at
On samming cover lower end surface, coil 13 is placed on coil backing plate.A ventilating duct 12 is mounted among three-level samming cover.
Nb3Sn coil, it is characterised in that coil surface arranges multiple thermocouples, thus the Temperature Distribution of detection coil.
Coil thermocouple is penetrated from samming cover preserved pipeline 29, and pipe ends are shut guarantee after the completion of coil thermocouple arrangement
The leakproofness of temperature cover.
Blower 1 is located at furnace body upper end, and draught fan impeller 2 is located at level-one samming tank 4 and 14 upper end intermediate course of second level samming cylinder
It is interior.
PLC control cabinet, it is characterised in that the area control cabinet Shang Youshang, Zhong Qu and the three deblocking temperature control table of bottom area are respectively for upper
Area, Zhong Qu and bottom area temperature-control heat couple.The effect of PLC control cabinet is setting in-furnace temperature curve, and limit value calandria heats function
Rate is adjusted fan operation frequency (adjustable in 0-50Hz).
A kind of specific reality of large size Nb3Sn coil heat treatment temperature control method of the present invention is given in the dependent claims
Scheme is applied, is not being repeated here.It is 5 DEG C/h in actual heat treatment process coil heating rate, rate of temperature fall is 5 DEG C/h, is risen
Temperature and the temperature uniformity of temperature-fall period are ± 7 DEG C, and each temperature uniformity for keeping the temperature platform reaches ± 2 DEG C, 575 DEG C and 650 DEG C
Heat preservation zone, temperature uniformity are even up to ± 1 DEG C, meet coil heat treatment temperature technical requirements.
The invention has the advantages that system is reliable, cost performance is high.Suitable for handling outer diameter 1-3m, high 0.5-4 meters of large size
Nb3Sn coil.Effectively coil heat treatment temperature can be controlled, reachable ± 1 DEG C of the holding stage coil temperature uniformity,
It solves the problems, such as coil surface oxidation simultaneously, improves the superconductivity of magnet coil.
Claims (6)
1. a kind of large size Nb3Sn coil is heat-treated multistage temperature equalization system, it is characterised in that: includes level-one samming tank, second level samming
Cylinder, three-level samming cover and PLC control cabinet, are disposed with resistive heater, level-one samming tank in the inner wall of the level-one samming tank
Upper end be fixedly installed with blower, the lower end of level-one samming tank is welded with furnace base, the upper end closure of the second level samming cylinder
Lower end is open, and second level samming cylinder is located on the inside of level-one samming tank, and the outer wall of second level samming cylinder and the inner wall of level-one samming tank use
Screw rod is fixedly connected, and the impeller of the blower is located in the upper end interlayer of level-one samming tank and second level samming cylinder, and described three
Grade samming cover is located on the inside of second level samming cylinder, is equipped with supporting leg in the upper surface of described furnace base, the three-level samming cover is put
In the upper surface of supporting leg, it is additionally provided with coil heat-conducting padding plate between supporting leg and three-level samming cover, is equipped in three-level samming cover
Magnet coil is equipped with samming cover gas outlet in the upper surface of three-level samming cover and coil upper end protects chamber, in coil upper terminal
It protects the top of chamber to be equipped with coil and is vented reserved opening, be equipped with samming cover air inlet, lower terminal guarantor in the lower end surface of three-level samming cover
Chamber and samming cover thermocouple provided pipe are protected, coil air inlet reserved opening is equipped in the lower end of lower terminal protection chamber, in the level-one
The lower end of samming tank be reserved with three-level samming cover air inlet pipe, coil air inlet pipe, three-level samming cover escape pipe, coil escape pipe and
Warm canister incoming gas pipe is equipped with samming tank escape pipe, the three-level samming cover air inlet pipe, coil air inlet in the upper end of level-one samming tank
Pipe, three-level samming cover escape pipe and coil escape pipe respectively with samming cover air inlet, coil air inlet reserved opening, samming cover gas outlet
It is connected with coil exhaust reserved opening, samming cover thermocouple provided pipe is additionally provided in the lower end surface of the three-level samming cover, in institute
The surface layout for the magnet coil stated multiple coil thermocouples, the coil thermocouple are from the samming cover thermocouple
It is penetrated in provided pipe；It is disposed with samming cover thermocouple in the three-level samming cover inner wall, the PLC control cabinet is controlled respectively
The work of resistive heater, blower and samming cover thermocouple processed is disposed with upper area on the coil upper end protection chamber and controls
Thermocouple temperature, area's temperature-controlling thermal couple in the inner sidewall middle position of three-level samming cover is disposed with, the cloth on coil lower terminal protection chamber
It is equipped with bottom area temperature-controlling thermal couple, upper area's temperature control table, upper area's temperature control table and upper area's temperature are separately installed in PLC control cabinet
Spend control table, upper area's temperature control table, upper area's temperature control table and upper area's temperature control table control respectively area's temperature-controlling thermal couple, in
The work of area's temperature-controlling thermal couple and bottom area temperature-controlling thermal couple.
2. a kind of large size Nb according to claim 13Sn coil is heat-treated multistage temperature equalization system, it is characterised in that: described
Level-one samming tank is using cylindrical stainless steel tank body, and tank body upper end is sealed with blower cover board using welding manner, under tank body
End and furnace base are sealed using welding manner；Tank body is divided into Shang Qu, Zhong Qu and bottom area, is arranged with heating in each area
Resistance wire.
3. a kind of large size Nb according to claim 23Sn coil is heat-treated multistage temperature equalization system, it is characterised in that: described
Second level samming cylinder uses stainless steel cylindrical tube, and the interlayer distance between second level samming drum outer wall and level-one samming top tank structure is
25-80cm。
4. a kind of large size Nb according to claim 33Sn coil is heat-treated multistage temperature equalization system, it is characterised in that: described
Three-level samming cover is the ring-shaped cylinder body cavity that upper and lower end face is had made of stainless sheet steel, is felt at ease in three-level samming cover
Equipped with ventilating duct, the inside and outside side wall of three-level samming cover is all made of ripple struction.
5. a kind of large size Nb according to claim 43Sn coil is heat-treated multistage temperature equalization system, it is characterised in that: described
The side of three-level samming cover be welded with multiple reinforcing ribs.
6. a kind of large size Nb3Sn coil is heat-treated the temperature control method of multistage temperature equalization system, it is characterised in that: specific step is as follows:
210 DEG C of heating curves are arranged in A on temperature control table, and heating rate uses 10-15 DEG C/h, and fan operation frequency is 30-
50Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
210 DEG C of keeping temprature curves are arranged in B on temperature control table, when coil magnet samming reaches 200 DEG C, stop heating, to three
When grade samming case temperature reaches 210 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited in 20KW, heat preservation
Time is set as 3000min, and fan operation frequency is 10-15Hz；
340 DEG C of heating curves are arranged in C on temperature control table, and heating rate uses 9-13 DEG C/h, and fan operation frequency is 28-
40Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
340 DEG C of keeping temprature curves are arranged in D on temperature control table, when coil magnet samming reaches 333 DEG C, stop heating, to three
When grade samming cover temperature reaches 340 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 24KW, are protected
The warm time is set as 1500min, and fan operation frequency is 10-15Hz；
450 DEG C of heating curves are arranged in E on temperature control table, and heating rate uses 8-10 DEG C/h, and fan operation frequency is 25-
30Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
450 DEG C of keeping temprature curves are arranged in F on temperature control table, when coil magnet samming reaches 445 DEG C, stop heating, to three
When grade samming cover temperature reaches 341 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 28KW, are protected
The warm time is set as 1500min, and fan operation frequency is 5-10Hz；
575 DEG C of heating curves are arranged in G on temperature control table, and heating rate uses 6-9 DEG C/h, and fan operation frequency is 18-
24Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
575 DEG C of keeping temprature curves are arranged in H on temperature control table, when magnet samming reaches 571 DEG C, stop heating, equal to three-level
When warm cover temperature reaches 570 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 30KW, when heat preservation
Between be set as 6000min, blower is out of service；
650 DEG C of heating curves are arranged in I on temperature control table, and heating rate uses 6-8 DEG C/h, and fan operation frequency is 10-
20Hz resets temperature control table, uses 5 DEG C/h instead and heat up when magnet heating rate reaches 5 DEG C/h；
650 DEG C of keeping temprature curves are arranged in J on temperature control table, when magnet samming reaches 648 DEG C, stop heating, equal to three-level
When warm cover temperature reaches 570 DEG C, heat preservation is begun to warm up, Shang Qu, Zhong Qu and bottom area heating power are limited within 35KW, when heat preservation
Between be set as 6000min, blower is out of service；
Temperature lowering curve is arranged in K on temperature control table, and rate of temperature fall uses 5 DEG C/h, and fan operation frequency is 5-10Hz, to magnetic
When temperature is down to 500, stops heating, blowing-out machine, cooled down.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953889A (en) * | 2019-12-12 | 2020-04-03 | 中国科学院合肥物质科学研究院 | Large Bi-2212 superconducting coil heat treatment furnace system and pressure control method thereof |
| CN111519005A (en) * | 2020-04-14 | 2020-08-11 | 中国科学院合肥物质科学研究院 | Large D-shaped Nb3Sn superconducting coil heat treatment equipment |
| CN115595424A (en) * | 2022-10-24 | 2023-01-13 | 温州大学（Cn） | Temperature control type cooling device for heat treatment of gas turbine blade and heat treatment method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60241611A (en) * | 1984-05-15 | 1985-11-30 | 日立電線株式会社 | Method of producing nb3sn superconductive wire |
| JPS61199060A (en) * | 1985-02-28 | 1986-09-03 | Natl Res Inst For Metals | Manufacture of nb3sn-diffused wire rod |
| CN105132841A (en) * | 2015-09-17 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Heat processing technology for CICC (Cable-in-Conduit Conductor) type RRP (Restack-Rod Process) Nb3Sn superconducting coil |
| CN109440037A (en) * | 2018-11-15 | 2019-03-08 | 中国科学院合肥物质科学研究院 | A kind of large size Nb3The heat treatment process of Sn superconducting coil |
-
2019
- 2019-03-29 CN CN201910248386.0A patent/CN110066973A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60241611A (en) * | 1984-05-15 | 1985-11-30 | 日立電線株式会社 | Method of producing nb3sn superconductive wire |
| JPS61199060A (en) * | 1985-02-28 | 1986-09-03 | Natl Res Inst For Metals | Manufacture of nb3sn-diffused wire rod |
| CN105132841A (en) * | 2015-09-17 | 2015-12-09 | 中国科学院合肥物质科学研究院 | Heat processing technology for CICC (Cable-in-Conduit Conductor) type RRP (Restack-Rod Process) Nb3Sn superconducting coil |
| CN109440037A (en) * | 2018-11-15 | 2019-03-08 | 中国科学院合肥物质科学研究院 | A kind of large size Nb3The heat treatment process of Sn superconducting coil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953889A (en) * | 2019-12-12 | 2020-04-03 | 中国科学院合肥物质科学研究院 | Large Bi-2212 superconducting coil heat treatment furnace system and pressure control method thereof |
| CN111519005A (en) * | 2020-04-14 | 2020-08-11 | 中国科学院合肥物质科学研究院 | Large D-shaped Nb3Sn superconducting coil heat treatment equipment |
| CN115595424A (en) * | 2022-10-24 | 2023-01-13 | 温州大学（Cn） | Temperature control type cooling device for heat treatment of gas turbine blade and heat treatment method thereof |
| CN115595424B (en) * | 2022-10-24 | 2024-05-07 | 温州大学 | Temperature-controlled cooling device for heat treatment of gas turbine blade and heat treatment method thereof |
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