CN102967781A - Equipment with variable volume Dewar for testing characteristic of high temperature superconductive strip - Google Patents
Equipment with variable volume Dewar for testing characteristic of high temperature superconductive strip Download PDFInfo
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- CN102967781A CN102967781A CN2012104793431A CN201210479343A CN102967781A CN 102967781 A CN102967781 A CN 102967781A CN 2012104793431 A CN2012104793431 A CN 2012104793431A CN 201210479343 A CN201210479343 A CN 201210479343A CN 102967781 A CN102967781 A CN 102967781A
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Abstract
The invention discloses equipment with a variable volume Dewar for testing characteristics of a high temperature superconductive strip. The equipment comprises a metal framework, the high temperature superconductive strip, a metal film, a liquid nitrogen Dewar, current leads, switches, a high-voltage generator, a water resistor, a high-voltage divider, a direct current power supply, a current divider, voltmeters and a computer, wherein when the equipment is used for testing, the high-voltage generator works firstly to test the insulation and voltage resistance characteristics of the strip; and after the voltage resistance characteristic testing is accomplished, the direct current power supply works so as to test the critical current characteristics of the strip. As the liquid nitrogen Dewar is a variable volume Dewar, fillers can be filled into the liquid nitrogen Dewar to maintain the level of the liquid nitrogen. By utilizing the equipment with the variable volume Dewar for testing characteristics of the high temperature superconductive strip, the insulation and voltage resistance characteristics and the critical current characteristics of the high temperature superconductive strip can be continuously tested, and the using amount of the liquid nitrogen can be saved.
Description
Technical field
The present invention relates to the belt material of high temperature superconduct technical field, particularly, the present invention relates to a kind of belt material of high temperature superconduct feature measurement equipment.
Background technology
Along with the development of Practical High-Temperature Superconducting Materials technology, the development of high-temperature superconductor power technology has also obtained a series of important breakthroughs, and multiple superconducting power device arises at the historic moment.And except hyperconductive cable, the core component of most superconducting power device all is high-temperature superconducting magnet.The insulation system of high-temperature superconducting magnet is complicated, needs to consider insulation and phase insulation etc. between coil turn-to-turn insulation, cake.At present, also not developing in the world special low-temperature insulation material, all is the insulating film material that screening is suitable for cryogenic applications from conventional insulation film basically.Generally usually adopt along the axial wrapped polyimide film tape of superconductive tape in the world, perhaps adopt methods such as applying insullac to improve the insulation system of superconducting tape, to satisfy the dielectric strength requirement of high-temperature superconducting magnet.
In the research and development of high-temperature superconducting magnet, the insulation characterisitic of belt material of high temperature superconduct and critical current properties are two very important technical indicators.At present, prior art does not also exist can generally be needed first its insulation characterisitic to be carried out the high pressure voltage-withstand test for the disposable checkout equipment of finishing detection of these two indexs, and then carries out the critical current test.Like this, will carry out above cold cycling twice to belt material of high temperature superconduct, this has certain negative effect to the belt material of high temperature superconduct performance.
In addition, because the test of the insulation characterisitic of belt material of high temperature superconduct need to select nonmetal Dewar type container to hold liquid nitrogen, but not metal Dewar, especially large-scale or the nonmetal Dewar difficulty of processing of rectangle is larger, the process-cycle is long, and is expensive.In the prior art, also do not have the device that can change for the volume of nonmetal Dewar, this just may make the consumption of the liquid nitrogen in test experience cause great waste, the serious process that also can directly affect experiment.
Summary of the invention
In view of the shortcoming of prior art, the object of the invention is to develop a kind of belt material of high temperature superconduct feature measurement equipment, it can measure dielectric voltage withstand characteristic and the critical current properties of belt material of high temperature superconduct continuously.
The invention provides a kind of belt material of high temperature superconduct feature measurement equipment, it is characterized in that, described belt material of high temperature superconduct feature measurement equipment comprises:
Metallic framework, described metallic framework is cylindrical;
Belt material of high temperature superconduct to be measured, described belt material of high temperature superconduct are wrapped on the periphery of described metallic framework along spirality path;
Metallic film, described metallic film center on described belt material of high temperature superconduct and are close to the outside of described belt material of high temperature superconduct, thereby so that described belt material of high temperature superconduct and described metallic framework all are positioned at the inboard of described metallic film;
Dewar container for liquefied nitrogen is equipped with liquid nitrogen in the described Dewar container for liquefied nitrogen, and described metallic framework, described belt material of high temperature superconduct and described metallic film all are placed in the liquid nitrogen in the described Dewar container for liquefied nitrogen;
The first current feed, described the first current feed is fixed in an end of described belt material of high temperature superconduct, and is electrically connected with described belt material of high temperature superconduct;
The second current feed, described the second current feed is fixed in the other end of described belt material of high temperature superconduct, and is electrically connected with described belt material of high temperature superconduct;
The first switch, the first end of described the first switch are electrically connected to described metallic framework and described metallic film, and the second end ground connection of described the first switch;
High pressure generator, the second end of the first end of described high pressure generator and described the first switch is electrically connected;
Water resistance, the second end of the first end of described water resistance and described high pressure generator is electrically connected;
Second switch, the second end of the first end of described second switch and described water resistance is electrically connected, and the second end of described second switch and the electrical connection of described the first current feed;
High-voltage bleeder, the first end of described high-voltage bleeder is electrically connected to the second end of described the first switch, the second end of described high-voltage bleeder is electrically connected to the first end of described second switch, thereby described high-voltage bleeder can be measured the voltage between the first end of the second end of described the first switch and described second switch;
The 3rd switch, the first end of described the 3rd switch are electrically connected to described the second current feed;
Direct supply, the first end of described direct supply are electrically connected to the second end of described the 3rd switch;
Shunt, the first end of described shunt are electrically connected to the second end of described direct supply;
The 4th switch, the first end of described the 4th switch are electrically connected to the second end of described shunt, and the second end of described the 4th switch is electrically connected to described the first current feed;
The first voltage table, the first end of described the first voltage table is electrically connected to the first end of described shunt, and the second end of described the first voltage table is electrically connected to the second end of described shunt;
Second voltage table, the first end of described second voltage table are electrically connected to the second end of described the 3rd switch, and the second end of described second voltage table is electrically connected to the first end of described the 4th switch;
Computing machine, described computing machine is connected respectively to described high pressure generator by the corresponding data line, described direct supply, described the first switch, described second switch, described the 3rd switch, described the 4th switch, described high-voltage bleeder, described the first voltage table and described second voltage table, so that from described high-voltage bleeder, described the first voltage table and described second voltage table gather voltage data and control described high pressure generator, described direct supply, described the first switch, described second switch, the operation of described the 3rd switch and described the 4th switch
Wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct and critical current properties being measured, at first utilize described the first switch of described computer control and described second switch to make its connection, and control described the 3rd switch and described the 4th switch makes its disconnection, and make described high pressure generator work, and monitor the voltage data of exporting from described high-voltage bleeder, thereby detect the dielectric voltage withstand characteristic of described belt material of high temperature superconduct; Then, after the dielectric voltage withstand Characteristics Detection of described belt material of high temperature superconduct is finished, utilize described the first switch of described computer control and described second switch to make its disconnection, and control described the 3rd switch and described the 4th switch makes its connection, and make described direct supply work, and monitor from the voltage data of described the first voltage table and the output of described second voltage table, and utilize described computing machine to carry out the data processing, thus the critical current properties of described belt material of high temperature superconduct detected.
Preferably, the inner space of described Dewar container for liquefied nitrogen is square space, and this square space can be divided into N mutually the same sub-square space equably, namely the 1st sub-square space, the 2nd sub-square space ..., N sub-square space; Described belt material of high temperature superconduct feature measurement equipment also comprises N-1 mutually the same square filling material and 2 mutually the same triangle filling materials, wherein said N-1 mutually the same square filling material be the 1st square filling material, the 2nd square filling material ..., N-1 square filling material, described 2 mutually the same triangle filling materials are the 1st triangle filling material and the 2nd triangle filling material; Described the 1st square filling material, the 2nd square filling material ..., N-1 square filling material respectively with described the 1st sub-square space, the 2nd sub-square space ..., N-1 sub-square space shape complementarity so as described the 1st square filling material, the 2nd square filling material ..., a N-1 square filling material can be filled into respectively described the 1st sub-square space, the 2nd sub-square space ..., in N-1 the sub-square space; And, described the 1st triangle filling material and the 2nd shape that the triangle filling material is overall can with the shape complementarity of described N sub-square space, thereby described the 1st triangle filling material and the 2nd triangle filling material can be filled in described N the sub-square space; Wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct and critical current properties being measured, can be according to the liquid nitrogen volatile quantity in the described Dewar container for liquefied nitrogen and the length of described metallic framework, with described the 1st square filling material, the 2nd square filling material, one or more in N-1 the square filling material are filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1, and/or in described the 1st triangle filling material and the 2nd the triangle filling material one or two is filled in described N the sub-square space so that so that the liquid nitrogen in the described Dewar container for liquefied nitrogen maintain can the above-mentioned metallic framework of submergence, the predetermined depth of above-mentioned belt material of high temperature superconduct and above-mentioned metallic film.
Preferably, described the 1st square filling material, the 2nd square filling material, be equipped with square filling material guide groove on the both sides of each the square filling material in the individual square filling material of N-1, correspondingly be provided with square filling material sliver on the inwall of described Dewar container for liquefied nitrogen, described square filling material guide groove can cooperatively interact with described square filling material sliver, so that with described the 1st square filling material, the 2nd square filling material, one or more square filling material in the individual square filling material of N-1 is filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1; Be equipped with triangle filling material guide groove on the both sides of each the triangle filling material in described the 1st triangle filling material and the 2nd the triangle filling material, correspondingly be provided with triangle filling material sliver on the inwall of described Dewar container for liquefied nitrogen, described triangle filling material guide groove can cooperatively interact with described triangle filling material sliver, so that one or two triangle filling material in described the 1st triangle filling material and the 2nd the triangle filling material is filled in described N the sub-square space.
Preferably, described the 1st square filling material, the 2nd square filling material ..., each the square filling material in N-1 the square filling material top be equipped with outstanding square filling material sticking department, the top end of the outer wall of described Dewar container for liquefied nitrogen correspondingly is provided with square filling material latch part, described square filling material latch part can snap-lock to described outstanding square filling material sticking department, so that corresponding square filling material is locked in the described Dewar container for liquefied nitrogen; The top of described the 1st triangle filling material is provided with outstanding triangle filling material sticking department, the top end of the outer wall of described Dewar container for liquefied nitrogen correspondingly is provided with triangle filling material latch part, described triangle filling material latch part can snap-lock to described outstanding triangle filling material sticking department, so that described the 1st triangle filling material is locked in the described Dewar container for liquefied nitrogen.
Preferably, described the 2nd triangle filling material is fixedly connected with tooth bar, wherein said belt material of high temperature superconduct feature measurement equipment also comprises motor, gear is fixed on the output shaft of described motor, described gear and described tooth bar are meshed, thereby described the 2nd triangle filling material can insert in the described Dewar container for liquefied nitrogen or from described Dewar container for liquefied nitrogen under the driving of described motor and break away from.
Preferably, in described Dewar container for liquefied nitrogen, be provided with liquid level sensor, described computing machine by the corresponding data line be connected liquid level sensor be connected motor and connect, wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct and critical current properties being measured, know that by described liquid level sensor the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen is lower than in the situation of predetermined depth at described computing machine, the described motor of described computer control is so that described the 2nd triangle filling material inserts in the described Dewar container for liquefied nitrogen gradually, so that the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen remains described predetermined depth; Wherein, inserted fully in the described Dewar container for liquefied nitrogen and described computing machine determines that still the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen is lower than in the situation of predetermined depth at described the 2nd triangle filling material, the described computing machine information that gives a warning, to impel the operator to insert corresponding square filling material and/or the 1st triangle filling material, so that the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen remains described predetermined depth.
Preferably, described N-1 mutually the same square filling material and described 2 mutually the same triangle filling materials all have double-decker, described double-decker is comprised of layer structure and endothecium structure, the thin outer crust of described layer structure for being consisted of by epoxy resin, and the inside contents of described endothecium structure for being consisted of by polypropylene foam material, described shell is coated on the periphery of described inner contents.
Preferably, described metallic framework is by steel or iron or copper one-tenth, and described metallic film is formed by aluminium foil or tinfoil.
Preferably, N is the natural number greater than 5.
Belt material of high temperature superconduct feature measurement equipment according to the present invention can be measured dielectric voltage withstand characteristic and the critical current properties of belt material of high temperature superconduct continuously, thereby has improved detection efficiency.And, the Dewar container for liquefied nitrogen of belt material of high temperature superconduct feature measurement equipment of the present invention is the Dewar container for liquefied nitrogen of variable volume, thereby can be packed into corresponding square filling material and/or triangle filling material according to actual measured conditions, thereby can be so that the liquid nitrogen liquid level in the Dewar container for liquefied nitrogen maintains desired depth, thereby can save the liquid nitrogen consumption, can save experimental cost thus.
Description of drawings
Fig. 1 is the general profile chart of the general structure of belt material of high temperature superconduct feature measurement equipment of the present invention;
Fig. 2 is that the A-A ' from Fig. 1 observes the Dewar container for liquefied nitrogen of the present invention see and the general profile chart of internal part thereof;
Fig. 3 is the summary side elevation that belt material of high temperature superconduct to be measured is wrapped in the general structure on the metallic framework;
Fig. 4 is the general profile chart of Dewar container for liquefied nitrogen of the present invention and filling material and driving mechanism thereof;
Fig. 5 A is that Dewar container for liquefied nitrogen of the present invention is along the general profile chart of its longitudinal direction;
Fig. 5 B is the general profile chart that Dewar container for liquefied nitrogen of the present invention is cut open along the B-B ' among Fig. 5 A;
Fig. 6 A is the summary side elevation of square filling material of the present invention;
Fig. 6 B is the general profile chart that square filling material of the present invention is cut open along the C-C ' among Fig. 6 A;
Fig. 7 A is the summary side elevation of the 1st triangle filling material of the present invention;
Fig. 7 B is the general profile chart that the 1st triangle filling material of the present invention is cut open along the D-D ' among Fig. 7 A;
Fig. 8 A is the summary side elevation of the 2nd triangle filling material of the present invention;
Fig. 8 B is the general profile chart that the 2nd triangle filling material of the present invention is cut open along the E-E ' among Fig. 8 A.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
The invention provides a kind of belt material of high temperature superconduct feature measurement equipment, this belt material of high temperature superconduct feature measurement equipment can be measured dielectric voltage withstand characteristic and the critical current properties of belt material of high temperature superconduct continuously.
Fig. 1 is the general profile chart of the general structure of belt material of high temperature superconduct feature measurement equipment of the present invention.Fig. 2 is that the A-A ' from Fig. 1 observes the Dewar container for liquefied nitrogen of the present invention see and the general profile chart of internal part thereof.Fig. 3 is the summary side elevation that belt material of high temperature superconduct to be measured is wrapped in the general structure on the metallic framework.
As shown in Figure 1-Figure 3, belt material of high temperature superconduct feature measurement equipment of the present invention comprises: metallic framework 2, and described metallic framework 2 is cylindrical, and wherein, preferably, described metallic framework 2 is become by steel, iron or copper; Belt material of high temperature superconduct 1 to be measured, described belt material of high temperature superconduct 1 are wrapped in along spirality path on the periphery of described metallic framework 2, and Fig. 3 shows in detail its preferred winding arrangement; Metallic film 3, described metallic film 3 centers on described belt material of high temperature superconduct 1 and is close to the outside of described belt material of high temperature superconduct 1, thereby so that described belt material of high temperature superconduct 1 and described metallic framework 2 all are positioned at the inboard of described metallic film 3, wherein, preferably, described metallic film 3 is formed by aluminium foil or tinfoil; Dewar container for liquefied nitrogen 4 is equipped with liquid nitrogen in the described Dewar container for liquefied nitrogen 4, and above-mentioned metallic framework 2, above-mentioned belt material of high temperature superconduct 1 and above-mentioned metallic film 3 all are placed in the liquid nitrogen in the described Dewar container for liquefied nitrogen 4.
Shown in Fig. 1,3, belt material of high temperature superconduct feature measurement equipment of the present invention also comprises: the first current feed 7, and described the first current feed 7 is fixed in an end of described belt material of high temperature superconduct 1, and is electrically connected with described belt material of high temperature superconduct 1; The second current feed 8, described the second current feed 8 is fixed in the other end of described belt material of high temperature superconduct 1, and is electrically connected with described belt material of high temperature superconduct 1.
As shown in Figure 1, belt material of high temperature superconduct feature measurement equipment of the present invention also comprises: the first switch 9, the first end of described the first switch 9 are electrically connected to described metallic framework 2 and described metallic film 3, and the second end ground connection of described the first switch 9; High pressure generator 15, the second end of the first end of described high pressure generator 15 and described the first switch 9 is electrically connected, and described high pressure generator 15 is used for providing high voltage to described belt material of high temperature superconduct 1, in order to measure the dielectric voltage withstand characteristic of described belt material of high temperature superconduct 1; Water resistance 17, the second end of the first end of described water resistance 17 and described high pressure generator 15 is electrically connected, wherein, described water resistance 17 has predetermined resistance flows through belt material of high temperature superconduct with restriction dash current, water resistance 17 can be by forming in the plexi-glass tubular that distilled water is packed into, it generally has larger resistance value, thereby the larger dash current in can limiting circuit; Second switch 10, the second end of the first end of described second switch 10 and described water resistance 17 is electrically connected, and the second end of described second switch 10 and 7 electrical connections of described the first current feed; High-voltage bleeder 19, the first end of described high-voltage bleeder 19 is electrically connected to the second end of described the first switch 9, the second end of described high-voltage bleeder 19 is electrically connected to the first end of described second switch 10, thereby described high-voltage bleeder 19 can be measured the voltage between the first end of the second end of described the first switch 9 and described second switch 10; The 3rd switch 11, the first end of described the 3rd switch 11 are electrically connected to described the second current feed 8; Direct supply 16, the first end of described direct supply 16 are electrically connected to the second end of described the 3rd switch 11; Shunt 18, the first end of described shunt 18 are electrically connected to the second end of described direct supply 16; The 4th switch 12, the first end of described the 4th switch 12 are electrically connected to the second end of described shunt 18, and the second end of described the 4th switch 12 is electrically connected to described the first current feed 7; The first voltage table 20, the first end of described the first voltage table 20 is electrically connected to the first end of described shunt 18, and the second end of described the first voltage table 20 is electrically connected to the second end of described shunt 18; Second voltage table 21, the first end of described second voltage table 21 are electrically connected to the second end of described the 3rd switch 11, and the second end of described second voltage table 21 is electrically connected to the first end of described the 4th switch 12; Computing machine 22, described computing machine 22 is connected respectively to described high pressure generator 15 by the corresponding data line, described direct supply 16, described the first switch 9, described second switch 10, described the 3rd switch 11, described the 4th switch 12, described high-voltage bleeder 19, described the first voltage table 20 and described second voltage table 21 are so that from described high-voltage bleeder 19, described the first voltage table 20 and described second voltage table 21 gather voltage data and control described high pressure generator 15, described direct supply 16, described the first switch 9, described second switch 10, the operation of described the 3rd switch 11 and described the 4th switch 12.
When with belt material of high temperature superconduct feature measurement equipment of the present invention the dielectric voltage withstand characteristic of described belt material of high temperature superconduct 1 and critical current properties being measured, at first utilize described computing machine 22 described the first switches 9 of control and described second switch 10 to make its connection, and control described the 3rd switch 11 and described the 4th switch 12 makes its disconnection, and make described high pressure generator 15 work, and monitor the voltage data of exporting from described high-voltage bleeder 19, thereby detect the dielectric voltage withstand characteristic of described belt material of high temperature superconduct 1; Then, after the dielectric voltage withstand Characteristics Detection of described belt material of high temperature superconduct 1 is finished, utilize described computing machine 22 described the first switches 9 of control and described second switch 10 to make its disconnection, and control described the 3rd switch 11 and described the 4th switch 12 makes its connection, and make described direct supply 16 work, and monitoring is from the voltage data of described the first voltage table 20 and the output of described second voltage table 21, and utilize described computing machine 22 to carry out the data processing, thereby detect the critical current properties of described belt material of high temperature superconduct 1.
The critical current properties of belt material of high temperature superconduct detects usually in the following manner: at first belt material of high temperature superconduct 1 is cooled to liquid nitrogen temperature, then give on the belt material of high temperature superconduct 1 by described direct supply 16 and apply DC current, utilize the voltage data of described computing machine 22 described the first voltage tables 20 of record and the output of described second voltage table 21, and utilize described computing machine 22 to carry out data and process, wherein at first according to the voltage data of described the first voltage table 20 outputs and the constant resistance value on the described shunt 18, calculate the current value that flows through on the described belt material of high temperature superconduct 1, then draw the voltage and current curve according to the voltage data of described second voltage table 21 output and the current data of calculating, when the unit length voltage of belt material of high temperature superconduct 1 be 1 μ V/cm or resistivity when being 2 * 10-13 Ω m corresponding electric current be the critical current of belt material of high temperature superconduct 1 under liquid nitrogen temperature.
Fig. 4 is the general profile chart of Dewar container for liquefied nitrogen of the present invention and filling material and driving mechanism thereof.Fig. 5 A is that Dewar container for liquefied nitrogen of the present invention is along the general profile chart of its longitudinal direction.Fig. 5 B is the general profile chart that Dewar container for liquefied nitrogen of the present invention is cut open along the B-B ' among Fig. 5 A.Fig. 6 A is the summary side elevation of square filling material of the present invention.Fig. 6 B is the general profile chart that square filling material of the present invention is cut open along the C-C ' among Fig. 6 A.Fig. 7 A is the summary side elevation of the 1st triangle filling material of the present invention.Fig. 7 B is the general profile chart that the 1st triangle filling material of the present invention is cut open along the D-D ' among Fig. 7 A.Fig. 8 A is the summary side elevation of the 2nd triangle filling material of the present invention.Fig. 8 B is the general profile chart that the 2nd triangle filling material of the present invention is cut open along the E-E ' among Fig. 8 A.
Shown in Fig. 4,5A, the inner space of Dewar container for liquefied nitrogen 4 is square space, and this square space can be divided into N mutually the same sub-square space equably, namely the 1st sub-square space, the 2nd sub-square space ..., N sub-square space.Belt material of high temperature superconduct feature measurement equipment of the present invention also comprises N-1 mutually the same square filling material 40 and 2 mutually the same triangle filling materials 43,45, wherein, described N-1 mutually the same square filling material 40 be the 1st square filling material, the 2nd square filling material ..., N-1 square filling material, described 2 mutually the same triangle filling materials 43,45 are the 1st triangle filling material 43 and the 2nd triangle filling material 45.Described the 1st square filling material, the 2nd square filling material ..., N-1 square filling material respectively with described the 1st sub-square space, the 2nd sub-square space ..., N-1 sub-square space shape complementarity so as described the 1st square filling material, the 2nd square filling material ..., a N-1 square filling material can be filled into respectively described the 1st sub-square space, the 2nd sub-square space ..., in N-1 the sub-square space; And, described the 1st triangle filling material 43 and the 2nd triangle filling material 45 both overall shape can with the shape complementarity of described N sub-square space, thereby described the 1st triangle filling material 43 and the 2nd triangle filling material 45 can be filled in described N the sub-square space.When with belt material of high temperature superconduct feature measurement equipment of the present invention the dielectric voltage withstand characteristic of described belt material of high temperature superconduct 1 and critical current properties being measured, can be according to the liquid nitrogen volatile quantity in the described Dewar container for liquefied nitrogen 4 and the length of described metallic framework 2, with described the 1st square filling material, the 2nd square filling material, one or more square filling material 40 in the individual square filling material of N-1 is filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1, and/or one or two triangle filling material in described the 1st triangle filling material 43 and the 2nd the triangle filling material 45 is filled in described N the sub-square space so that so that the liquid nitrogen in the described Dewar container for liquefied nitrogen 4 maintain can the above-mentioned metallic framework 2 of submergence, the predetermined depth of above-mentioned belt material of high temperature superconduct 1 and above-mentioned metallic film 3.Embodiment shown in Fig. 4, the 5A is the example of N=10.In the present invention, preferably, N is the natural number greater than 5.It should be noted that in the present invention, shown in Fig. 6 A and Fig. 6 B, square filling material 40 is hexahedral shape, and its longitudinal section is rectangle or square; Shown in Fig. 7 A-Fig. 8 B, triangle filling material 43,45 longitudinal section are triangle, wherein can obtain two triangle filling materials by the inclination diagonal plane cutting along a square filling material.
Preferably, described the 1st square filling material, the 2nd square filling material, be equipped with square filling material guide groove 41(such as Fig. 6 A on the both sides of each the square filling material 40 in the individual square filling material of N-1, shown in the 6B), correspondingly be provided with square filling material sliver 30(such as Fig. 5 A on the inwall of described Dewar container for liquefied nitrogen 4, shown in the 5B), described square filling material guide groove 41 can cooperatively interact with described square filling material sliver 30, so that with described the 1st square filling material, the 2nd square filling material, one or more square filling material 40 in the individual square filling material of N-1 is filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1.
Shown in Fig. 5 A, 7A, 7B, 8A, 8B, be equipped with triangle filling material guide groove 141 on the both sides of each the triangle filling material in described the 1st triangle filling material 43 and the 2nd the triangle filling material 45, correspondingly be provided with triangle filling material sliver 130 on the inwall of described Dewar container for liquefied nitrogen 4, described triangle filling material guide groove 141 can cooperatively interact with described triangle filling material sliver 130, so that one or two triangle filling material in described the 1st triangle filling material 43 and the 2nd the triangle filling material 45 is filled in described N the sub-square space.
Preferably, described the 1st square filling material, the 2nd square filling material ..., each the square filling material 40 in N-1 the square filling material top be equipped with outstanding square filling material sticking department 42, shown in Fig. 6 A, 6B, the top end of the outer wall of described Dewar container for liquefied nitrogen 4 correspondingly is provided with square filling material latch part 31, shown in Fig. 5 A, 5B, described square filling material latch part 31 can snap-lock to described outstanding square filling material sticking department 42, so that corresponding square filling material 40 is locked in the described Dewar container for liquefied nitrogen 4.
Shown in Fig. 4,5A, 7B, the top of described the 1st triangle filling material 43 is provided with outstanding triangle filling material sticking department 44, the top end of the outer wall of described Dewar container for liquefied nitrogen 4 correspondingly is provided with triangle filling material latch part 32, described triangle filling material latch part 32 can snap-lock to described outstanding triangle filling material sticking department 44, so that described the 1st triangle filling material 43 is locked in the described Dewar container for liquefied nitrogen 4.
Shown in Fig. 4,5A, 8A, 8B, described the 2nd triangle filling material 45 is fixedly connected with tooth bar 46, wherein said belt material of high temperature superconduct feature measurement equipment also comprises motor 47, gear 48 is fixed on the output shaft of described motor 47, described gear 48 and described tooth bar 46 are meshed, thereby described the 2nd triangle filling material 45 can insert in the described Dewar container for liquefied nitrogen 4 or from described Dewar container for liquefied nitrogen 4 under the driving of described motor 47 and leave.
In addition, as shown in Figure 1, can in described Dewar container for liquefied nitrogen 4, be provided with liquid level sensor 50, described computing machine 22 can by the corresponding data line be connected liquid level sensor 50 be connected motor 47 and connect.When with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct 1 and critical current properties being measured, know that by described liquid level sensor 50 the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen 4 is lower than in the situation of predetermined depth at described computing machine 22, the described motor 47 of described computing machine 22 controls is so that described the 2nd triangle filling material 45 inserts in the described Dewar container for liquefied nitrogen 4 gradually, so that the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen 4 remains described predetermined depth.Thereby, computing machine 22 can suitably be controlled motor 47 to insert gradually the 2nd triangle filling material 45 according to the reduction amount of the liquid nitrogen liquid level in the Dewar container for liquefied nitrogen 4, so that the reduction of the liquid nitrogen liquid level in the compensation Dewar container for liquefied nitrogen 4, thereby the liquid nitrogen liquid level that can keep in the Dewar container for liquefied nitrogen 4 is in a substantially invariable depth.
Further, inserted fully in the described Dewar container for liquefied nitrogen 4 and described computing machine 22 determines that still the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen 4 is lower than in the situation of predetermined depth (namely at described the 2nd triangle filling material 45, in the larger situation of liquid nitrogen reduction in Dewar container for liquefied nitrogen 4), computing machine 22 information that gives a warning, to impel the operator to insert corresponding square filling material 40 and/or the 1st triangle filling material 43, so that the liquid nitrogen degree of depth in the Dewar container for liquefied nitrogen 4 can remain predetermined depth.Particularly, when the liquid nitrogen volatile quantity in Dewar container for liquefied nitrogen 4 is larger, only by the 2nd a triangle filling material 45 can't the full remuneration Dewar container for liquefied nitrogen liquid nitrogen reduction in 4, at this moment, computing machine 22 can provide information with alert operator, to impel the operator to insert in the Dewar container for liquefied nitrogen 4 in the 1st triangle filling material 43 insertion Dewar container for liquefied nitrogen 4 of a monoblock and/or with one or more square filling materials 40, so that the reduction of the liquid nitrogen liquid level in the compensation Dewar container for liquefied nitrogen 4, thereby the liquid nitrogen liquid level that can continue to keep in the Dewar container for liquefied nitrogen 4 is in a substantially invariable depth.
In addition, in the present invention, preferably, described N-1 mutually the same square filling material and described 2 mutually the same triangle filling materials all have double-decker, described double-decker is comprised of layer structure and endothecium structure, the thin outer crust of described layer structure for being made of epoxy resin, and the inside contents of described endothecium structure for being made of polypropylene foam material, described shell is coated on the periphery of described inner contents.When the dielectric voltage withstand characteristic of belt material of high temperature superconduct and critical current properties are measured, have the square filling material that designs above and triangle filling material because its material and design characteristic and can reduce liquid nitrogen volatile quantity in the Dewar, thereby can further save the liquid nitrogen consumption in the test.
Preferably, N is the natural number greater than 5.
Belt material of high temperature superconduct feature measurement equipment according to the present invention can be measured dielectric voltage withstand characteristic and the critical current properties of belt material of high temperature superconduct continuously, thereby has improved detection efficiency.And, the Dewar container for liquefied nitrogen of belt material of high temperature superconduct feature measurement equipment of the present invention is the Dewar container for liquefied nitrogen of variable volume, thereby can be packed into corresponding square filling material and/or triangle filling material according to actual measured conditions, thereby can be so that the liquid level in the Dewar container for liquefied nitrogen maintains desired depth, thereby can save the liquid nitrogen consumption, can save experimental cost thus.
For the ordinary skill in the art, can be easy to the details of embodiments of the invention is carried out various modification and improvement.These modification and improvement all drop within the scope of design of the present invention.
Claims (9)
1. the belt material of high temperature superconduct feature measurement equipment with variable volume Dewar is characterized in that, described belt material of high temperature superconduct feature measurement equipment comprises:
Metallic framework (2), described metallic framework (2) is cylindrical;
Belt material of high temperature superconduct to be measured (1), described belt material of high temperature superconduct (1) is wrapped on the periphery of described metallic framework (2) along spirality path;
Metallic film (3), described metallic film (3) centers on described belt material of high temperature superconduct (1) and is close to the outside of described belt material of high temperature superconduct (1), so that described belt material of high temperature superconduct (1) and described metallic framework (2) all are positioned at the inboard of described metallic film (3);
Dewar container for liquefied nitrogen (4), described Dewar container for liquefied nitrogen is equipped with liquid nitrogen in (4); Described metallic framework (2), described belt material of high temperature superconduct (1) and described metallic film (3) all are placed in the described Dewar container for liquefied nitrogen (4), and are immersed in the liquid nitrogen;
The first current feed (7), described the first current feed (7) is fixed in an end of described belt material of high temperature superconduct (1), and is electrically connected with described belt material of high temperature superconduct (1);
The second current feed (8), described the second current feed (8) is fixed in the other end of described belt material of high temperature superconduct (1), and is electrically connected with described belt material of high temperature superconduct (1);
The first switch (9), the first end of described the first switch (9) are electrically connected to described metallic framework (2) and described metallic film (3), and the second end ground connection of described the first switch (9);
High pressure generator (15), the first end of described high pressure generator (15) and described the first switch (9) second ends are electrically connected;
Water resistance (17), the second end of the first end of described water resistance (17) and described high pressure generator (15) is electrically connected;
Second switch (10), the second end of the first end of described second switch (10) and described water resistance (17) is electrically connected, and the second end of described second switch (10) and described the first current feed (7) electrical connection;
High-voltage bleeder (19), the first end of described high-voltage bleeder (19) is electrically connected to the second end of described the first switch (9), the second end of described high-voltage bleeder (19) is electrically connected to the first end of described second switch (10), thereby described high-voltage bleeder (19) can be measured the voltage between the first end of the second end of described the first switch (9) and described second switch (10);
The 3rd switch (11), the first end of described the 3rd switch (11) is electrically connected to described the second current feed (8);
Direct supply (16), the first end of described direct supply (16) is electrically connected to the second end of described the 3rd switch (11);
Shunt (18), the first end of described shunt (18) is electrically connected to the second end of described direct supply (16);
The 4th switch (12), the first end of described the 4th switch (12) is electrically connected to the second end of described shunt (18), and the second end of described the 4th switch (12) is electrically connected to described the first current feed (7);
The first voltage table (20), the first end of described the first voltage table (20) is electrically connected to the first end of described shunt (18), and the second end of described the first voltage table (20) is electrically connected to the second end of described shunt (18);
Second voltage table (21), the first end of described second voltage table (21) is electrically connected to the second end of described the 3rd switch (11), and the second end of described second voltage table (21) is electrically connected to the first end of described the 4th switch (12);
Computing machine (22), described computing machine (22) is connected respectively to described high pressure generator (15) by the corresponding data line, described direct supply (16), described the first switch (9), described second switch (10), described the 3rd switch (11), described the 4th switch (12), described high-voltage bleeder (19), described the first voltage table (20) and described second voltage table (21) are so that from described high-voltage bleeder (19), described the first voltage table (20) and described second voltage table (21) gather voltage data and control described high pressure generator (15), described direct supply (16), described the first switch (9), described second switch (10), the operation of described the 3rd switch (11) and described the 4th switch (12);
Wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct (1) and critical current properties being measured, at first utilize described computing machine (22) control described the first switch (9) and described second switch (10) to make its connection, and control described the 3rd switch (11) and described the 4th switch (12) makes its disconnection, and make described high pressure generator (15) work, and monitor the voltage data of exporting from described high-voltage bleeder (19), thereby detect the dielectric voltage withstand characteristic of described belt material of high temperature superconduct (1); Then, after the dielectric voltage withstand Characteristics Detection of described belt material of high temperature superconduct (1) is finished, utilize described computing machine (22) control described the first switch (9) and described second switch (10) to make its disconnection, and control described the 3rd switch (11) and described the 4th switch (12) makes its connection, and make described direct supply (16) work, and monitoring is from the voltage data of described the first voltage table (20) and described second voltage table (21) output, and utilize described computing machine (22) to carry out the data processing, thereby detect the critical current properties of described belt material of high temperature superconduct (1).
2. belt material of high temperature superconduct feature measurement equipment according to claim 1, it is characterized in that, the inner space of described Dewar container for liquefied nitrogen (4) is square space, this square space can be divided into N mutually the same sub-square space equably, namely the 1st sub-square space, the 2nd sub-square space ..., N sub-square space;
Described belt material of high temperature superconduct feature measurement equipment also comprises N-1 mutually the same square filling material (40) and 2 mutually the same triangle filling materials (43,45), wherein said N-1 mutually the same square filling material (40) be the 1st square filling material, the 2nd square filling material ..., N-1 square filling material, described 2 mutually the same triangle filling materials (43,45) are the 1st triangle filling material (43) and the 2nd triangle filling material (45);
Described the 1st square filling material, the 2nd square filling material ..., N-1 square filling material respectively with described the 1st sub-square space, the 2nd sub-square space ..., N-1 sub-square space shape complementarity so as described the 1st square filling material, the 2nd square filling material ..., a N-1 square filling material can be filled into respectively described the 1st sub-square space, the 2nd sub-square space ..., in N-1 the sub-square space; And, described the 1st triangle filling material (43) and both overall shapes of the 2nd triangle filling material (45) can with the shape complementarity of described N sub-square space, thereby described the 1st triangle filling material (43) and the 2nd triangle filling material (45) can be filled in the individual sub-square space of described N;
Wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct (1) and critical current properties being measured, can be according to the liquid nitrogen volatile quantity in the described Dewar container for liquefied nitrogen (4) and the length of described metallic framework (2), with described the 1st square filling material, the 2nd square filling material, one or more in N-1 the square filling material are filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1, and in described the 1st triangle filling material (43) and the 2nd the triangle filling material (45) one or two is filled in described N the sub-square space so that so that the liquid nitrogen in the described Dewar container for liquefied nitrogen (4) maintain can the above-mentioned metallic framework of submergence (2), the predetermined depth of above-mentioned belt material of high temperature superconduct (1) and above-mentioned metallic film (3).
3. belt material of high temperature superconduct feature measurement equipment according to claim 2, it is characterized in that, described the 1st square filling material, the 2nd square filling material, be equipped with square filling material guide groove (41) on the both sides of each the square filling material (40) in the individual square filling material of N-1, correspondingly be provided with square filling material sliver (30) on the inwall of described Dewar container for liquefied nitrogen (4), described square filling material guide groove (41) can cooperatively interact with described square filling material sliver (30), so that with described the 1st square filling material, the 2nd square filling material, one or more square filling material (40) in the individual square filling material of N-1 is filled into respectively described the 1st sub-square space, the 2nd sub-square space, in the additional space in the individual sub-square space of N-1;
Be equipped with triangle filling material guide groove (141) on the both sides of each the triangle filling material in described the 1st triangle filling material (43) and the 2nd the triangle filling material (45), correspondingly be provided with triangle filling material sliver (130) on the inwall of described Dewar container for liquefied nitrogen (4), described triangle filling material guide groove (141) cooperatively interacts with described triangle filling material sliver (130), so that one or two triangle filling material in described the 1st triangle filling material (43) and the 2nd the triangle filling material (45) is filled in described N the sub-square space.
4. belt material of high temperature superconduct feature measurement equipment according to claim 3, it is characterized in that, described the 1st square filling material, the 2nd square filling material, the top of each the square filling material (40) in the individual square filling material of N-1 is equipped with outstanding square filling material sticking department (42), the top end of the outer wall of described Dewar container for liquefied nitrogen (4) correspondingly is provided with square filling material latch part (31), described square filling material latch part (31) can snap-lock arrive on the described outstanding square filling material sticking department (42), so that corresponding square filling material (40) is locked in the described Dewar container for liquefied nitrogen (4);
The top of described the 1st triangle filling material (43) is provided with outstanding triangle filling material sticking department (44), the top end of the outer wall of described Dewar container for liquefied nitrogen (4) correspondingly is provided with triangle filling material latch part (32), described triangle filling material latch part (32) can snap-lock arrive on the described outstanding triangle filling material sticking department (44), so that described the 1st triangle filling material (43) is locked in the described Dewar container for liquefied nitrogen (4).
5. belt material of high temperature superconduct feature measurement equipment according to claim 4, it is characterized in that, described the 2nd triangle filling material (45) is fixedly connected with tooth bar (46), wherein said belt material of high temperature superconduct feature measurement equipment also comprises motor (47), gear (48) is fixed on the output shaft of described motor (47), described gear (48) and described tooth bar (46) are meshed, thereby described the 2nd triangle filling material (45) can insert in the described Dewar container for liquefied nitrogen (4) under the driving of described motor (47) or disengaging from described Dewar container for liquefied nitrogen (4).
6. belt material of high temperature superconduct feature measurement equipment according to claim 5, it is characterized in that, be provided with liquid level sensor (50) in the described Dewar container for liquefied nitrogen (4), described computing machine (22) by the corresponding data line be connected liquid level sensor (50) and motor (47) connection of being connected;
Wherein, when with described belt material of high temperature superconduct feature measurement equipment the dielectric voltage withstand characteristic of described belt material of high temperature superconduct (1) and critical current properties being measured, know that by described liquid level sensor (50) the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen (4) is lower than in the situation of predetermined depth at described computing machine (22), described computing machine (22) is controlled described motor (47) so that described the 2nd triangle filling material (45) inserts in the described Dewar container for liquefied nitrogen (4) gradually, so that the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen (4) remains described predetermined depth;
Wherein, inserted fully in the described Dewar container for liquefied nitrogen (4) and described computing machine (22) determines that still the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen (4) is lower than in the situation of described predetermined depth at described the 2nd triangle filling material (45), described computing machine (22) information that gives a warning, to impel the operator to insert corresponding square filling material (40) and/or the 1st triangle filling material (43), so that the liquid nitrogen degree of depth in the described Dewar container for liquefied nitrogen (4) remains described predetermined depth.
7. the described belt material of high temperature superconduct feature measurement of each according to claim 2-6 equipment, it is characterized in that, described N-1 mutually the same square filling material and described 2 mutually the same triangle filling materials all have double-decker, described double-decker is comprised of layer structure and endothecium structure, the thin outer crust of described layer structure for being consisted of by epoxy resin, and the inside contents of described endothecium structure for being consisted of by polypropylene foam material, described shell is coated on the periphery of described inner contents.
8. the described belt material of high temperature superconduct feature measurement of each according to claim 1-6 equipment is characterized in that, described metallic framework (2) is by steel or iron or copper one-tenth, and described metallic film (3) is formed by aluminium foil or tinfoil.
9. the described belt material of high temperature superconduct feature measurement of each according to claim 2-4 equipment is characterized in that N is the natural number greater than 5.
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| CN110579680A (en) * | 2019-08-07 | 2019-12-17 | 湖北工业大学 | nondestructive testing device and method for superconducting cable |
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