CN105957684B

CN105957684B - Superconduction Dewar tank

Info

Publication number: CN105957684B
Application number: CN201610487907.4A
Authority: CN
Inventors: 张泽民
Original assignee: Shanghai Best Technology Co Ltd
Current assignee: Shanghai Best Technology Co Ltd
Priority date: 2016-06-28
Filing date: 2016-06-28
Publication date: 2018-04-24
Anticipated expiration: 2036-06-28
Also published as: CN105957684A

Abstract

The present invention provides a kind of superconduction Dewar tank, it is characterised in that is all round authentic Altitude for disposing the tank body of superconductor, the vacuum environment is connection.The present invention uses the authentic hollow structure in superconductor periphery, additional protective shield of radiation design, insulating material does ladle body structure, the transmission of heat can not only be greatly reduced, produce at the same time when can avoid because of superconduction running body magnetic field row into influence of the ring current to superconducting device, cryogenic media can be automatically replenished, it can be ensured that superconduction running body high efficiency, the reliability of longtime running, can meet the needs of superconductor field application.

Description

Superconduction Dewar tank

Technical field

The present invention relates to a kind of Dewar tank for building superconductive device.

Background technology

Superconducting phenomenon is regarded as a kind of macroscopic quantum effect by BCS theory.It proposes that spin the electricity opposite with momentum in metal Son can match to form so-called " Cooper pair ", and Cooper pair loss-free can be moved among lattice, form supercurrent. While BCS theory proposes, the Nicolai Bo Geliubofu also independent interpretation of quantum mechanics for proposing superconductivity, he makes Bo Geliubofu conversion is commonly used for people so far.

The Coulomb force that interelectric direct interaction excludes each other.If only directly acted on there are Coulomb force Words, interelectric this interaction can attract each other when meeting certain condition, be exactly that this sucking action causes The generation of " Cooper pair ".Generally, its mechanism is as follows：Electronics can attract the positive electricity on neighbouring lattice point when being moved in lattice Lotus, causes the local distortion of lattice point, forms the high Pregionp of a local.The high Pregionp of this local can attract to spin Opposite electronics, and original electronics can be combined pairing with certain combination.At quite low temperatures, it is possible to combine energy for this Higher than lattice atoms vibration energy, in this way, electronics to will not and lattice occur energy exchange, also just there is no resistance, formation So-called " superconduction ".

Although BCS is confirmed by experiment, but still has some problems to need to solve, such as：One superconduction annulus is placed on In magnetic field and it is cooled to below critical-temperature, removes magnetic field suddenly, then generation is inducted supercurrent in superconducting ring.Experiment hair Existing, this electric current can continue also to find no significant change in several years.

Superconducting transformer is that superconductor is applied in the specific of technical field of electric power, the basic structure and work of superconducting transformer It is identical with conventional immersion oil transformer to make principle.They all by once, the part such as secondary coil and iron core forms.And superconduction transformation The copper wire that device is instead of using superconducting coil in conventional transformer makes once, secondary coil, and superconducting coil is immersed in liquid In state helium or liquid nitrogen.Compared with conventional immersion oil transformer, superconducting transformer has small-sized, light weight, high efficiency, endangers without burning Nearly, the advantages that current limitation effect is good.At present, conventional superconducting transformer, is the winding for rolling bismuth oxide superconducting wire rod, is put into Made of glass fiber reinforced fiberglass in heat-insulated cylinder, and liquid nitrogen is injected, to substitute transformer oil, iron core is placed on room Completely cut off in warm space with liquid nitrogen.

It can be seen from the above that the structure and performance of the heat-insulated tubular for liquid nitrogen storage, are to ensure that cryogenic media such as liquid nitrogen does not steam Hair, so as to ensure that superconductor is in a very crucial equipment of superconducting state, is also referred to as Dewar tank.

At present, the Dewar tank is the pressure vessel prepared using the stainless steel of super vacuum insulation mostly, for storing up Deposit, transport and using liquid oxygen, liquid nitrogen, liquid argon or carbon dioxide.

Dewar tank have two it is main the advantages of：First is, it can be in relatively low pressure compared with compressed gas cylinder Substantial amounts of gas is accommodated under power.Second is that it provides maneuverable cryogenic fluid source.Since Dewar tank is firm reliable, protect Time length is held, fully meets use gas requirement under normal conditions.

But in superconductor applications, also there are many defects, poor thermal insulation property, no vacuum insulation knot for current Dewar tank Structure, produced when can not overcome because of superconduction running body magnetic field row into influence of the ring current to superconducting device, cryogenic media can not It is automatically replenished, therefore, it is impossible to ensure superconduction running body high efficiency, the reliability of longtime running, is not met by superconductor neck The needs of domain application.

The content of the invention

The object of the present invention is to provide a kind of superconduction Dewar tank, to overcome defect present on the prior art, meets related The needs of field application.

Superconduction Dewar tank of the present invention, is all round authentic Altitude for disposing the tank body of superconductor, described Vacuum environment is connection.

The beneficial effects of the invention are as follows：

The present invention uses the authentic hollow structure in superconductor periphery, additional protective shield of radiation design, and insulating material does ladle body structure, When can not only greatly reduce the transmission of heat, while can avoid because of superconduction running body produce magnetic field row into ring current pair The influence of superconducting device, cryogenic media can be automatically replenished, it can be ensured that superconduction running body high efficiency, longtime running it is reliable Property, it can meet the needs that superconductor field is applied.

Brief description of the drawings

Fig. 1 is superconduction Dewar tank cross-sectional view.

Fig. 2 is superconduction Dewar tank cross section structure schematic diagram.

Fig. 3 is radiation protective layer structure diagram.

Embodiment

The superconduction Dewar tank, is all round authentic Altitude for disposing the tank body of superconductor, the vacuum ring Border is connection.

Preferably, referring to Fig. 1~Fig. 3, superconduction Dewar tank of the present invention, including the first inner tube 1, the second inner tube 2, Three inner tubes 3, outer tube 4, annulus outer cover plate 9 and annulus inner cover plate 19；

Second inner tube 2 is sleeved on outside first inner tube 1, and the cavity between the second inner tube 2 and the first inner tube 1 is First vacuum chamber 6；

3rd inner tube 3 is sleeved on outside the second inner tube 2, and the cavity between the 3rd 3 sets of inner tube and the second inner tube 2 is low temperature Dielectric cavity 7, for disposing cryogenic media and superconductor；

The outer tube 4 is sleeved on outside the 3rd inner tube 3, and the cavity between 4 and the 3rd inner tube 3 of outer tube is the second vacuum chamber 8；

The annulus outer cover plate 9 is covered at the both ends of second inner tube 2, the 3rd inner tube 3 and outer tube 4, and the company of sealing Connect, the outer wall at the both ends of first inner tube 1 is connected with the endoporus 901 of the annulus outer cover plate 9；

The annulus inner cover plate 19 is covered at the both ends of the cryogenic media chamber 7, positioned at the lower section of annulus outer cover plate 9, The 3rd vacuum chamber 20 is formed between the annulus outer cover plate 9；

The 3rd inner tube 3 and the second inner tube 2 at 3rd vacuum chamber 20 are equipped with access opening 21 so that the 3rd vacuum chamber 20th, the second vacuum chamber and the first vacuum chamber are interconnected；

Preferably, on the outer cover plate 9, equipped with liquid in-out mouth 14, the liquid in-out mouth is by through inner cover plate 19 pipeline, is connected with cryogenic media chamber 7, and the liquid in-out mouth 14 is equipped with liquid in-out valve；

Preferably, on the outer cover plate 9, equipped with vacuum port 15,15 and first vacuum chamber of vacuum port, second Vacuum chamber or the 3rd vacuum chamber are connected, and the vacuum port 15 is equipped with vacuum valve；

Preferably, radiation protective layer 11 is also fitted with the outer wall of the 3rd inner tube, referring to Fig. 3, the radiation protection Layer 11 is the metal foil equipped with vertical incision 1101, such as aluminium foil, gold-plated reflective membrane, for preventing heat conduct radiation；

Preferably, liquid level sensor 21 is further included, the liquid level sensor is arranged in cryogenic media chamber 7；

Preferably, further include pressure sensor, the pressure sensor be arranged on the first vacuum chamber, the second vacuum chamber or In 3rd vacuum chamber；

First inner tube 1, the second inner tube 2, the 3rd inner tube 3 and the outer tube 4 uses engineering thermal insulation plastics, such as asphalt mixtures modified by epoxy resin Fat, polyurethane, carbamide resin etc..

Preferably, sensor component 30 and superconductor component 40 are further included, the sensor component is fixed by connector In first inner tube 1, the material of the sensor component is metal material, such as iron core, silicon steel sheet；The superconduction material Material component 40 is arranged in the cryogenic media chamber 7, and the shape of the superconductor component does not limit, such as coil, bar Band, plate etc.；The superconductor is conventional technique.

Preferably, in first vacuum chamber, the second vacuum chamber or the 3rd vacuum chamber, it is additionally provided with gas adsorption material 22。

Claims

1. superconduction Dewar tank, it is characterised in that for disposing the tank body of superconductor, superconducting magnet periphery is authentic Altitude, The vacuum environment is to connect, including the first inner tube（1）, the second inner tube（2）, the 3rd inner tube（3）, outer tube（4）, outside annulus Cover board（9）With annulus inner cover plate（19）；

For second inner tube set outside first inner tube, the cavity between the second inner tube and the first inner tube is the first vacuum Chamber（6）；

For 3rd inner tube set outside the second inner tube, the cavity between the 3rd inner tube and the second inner tube is cryogenic media chamber（7）, For disposing cryogenic media and superconductor；

For the outer tube sleeve outside the 3rd inner tube, the cavity between outer tube and the 3rd inner tube is the second vacuum chamber（8）；

The annulus outer cover plate is covered at the both ends of second inner tube, the 3rd inner and outer tubes, and is tightly connected, described The endoporus of the outer wall at the both ends of the first inner tube and the annulus outer cover plate（901）It is connected；

The annulus inner cover plate is covered at the both ends of the cryogenic media chamber, and described positioned at the lower section of annulus outer cover plate The 3rd vacuum chamber is formed between annulus outer cover plate（20）；

The 3rd inner tube and the second inner tube at 3rd vacuum chamber are equipped with access opening（21）；

Radiation protective layer is also fitted with the outer wall of the 3rd inner tube（11）, the radiation protective layer is equipped with vertical incision Metal foil；

In first vacuum chamber, the second vacuum chamber or the 3rd vacuum chamber, gas adsorption material is additionally provided with；

Liquid level sensor is equipped with the cryogenic media chamber, it is true in first vacuum chamber, the second vacuum chamber or the 3rd Pressure sensor is equipped with cavity.

2. superconduction Dewar tank according to claim 1, it is characterised in that on the annulus outer cover plate, equipped with disengaging Liquid mouth（14）, the liquid in-out mouth is connected with cryogenic media chamber by the pipeline through the annulus inner cover plate, described Liquid in-out mouth be equipped with liquid in-out valve.

3. superconduction Dewar tank according to claim 2, it is characterised in that on the outer cover plate, equipped with vacuum port （15）, the vacuum port is connected with the first vacuum chamber, the second vacuum chamber or the 3rd vacuum chamber, and the vacuum port is equipped with true Empty valve.

4. according to claim 1 ~ 3 any one of them superconduction Dewar tank, it is characterised in that first inner tube, in second Pipe, the 3rd inner and outer tubes use engineering thermal insulation plastics.

5. superconduction Dewar tank according to claim 4, it is characterised in that further include sensor component, the sensor component It is fixed on by connector in first inner tube.