CN210865767U - Dewar for superconducting power device - Google Patents
Dewar for superconducting power device Download PDFInfo
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- CN210865767U CN210865767U CN201921858481.4U CN201921858481U CN210865767U CN 210865767 U CN210865767 U CN 210865767U CN 201921858481 U CN201921858481 U CN 201921858481U CN 210865767 U CN210865767 U CN 210865767U
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Abstract
The utility model provides a dewar for superconducting power device, include: the liquid nitrogen storage tank is characterized by comprising a tank body for containing liquid nitrogen, wherein the top of the tank body is formed into an open end; a top cover connected with the opening end of the box body in a sealing mode; an inner tube for passing a core limb of the superconducting power device therethrough, the inner tube being disposed to pass transversely through the tank; the first end plate and the second end plate are arranged at the two transverse ends of the box body; the two ends of the inner cylinder are respectively and fixedly connected with the first end plate and the second end plate, and the box body, the top cover and the inner cylinder are all arranged into a double-wall structure with a vacuum heat insulation layer.
Description
Technical Field
The utility model belongs to the technical field of the superconduction, specifically relate to a dewar for superconductive power device.
Background
Transformers are important devices in modern power systems. Superconducting transformers are in principle not substantially different from conventional transformers. Because the current density of the superconducting wire is far higher than that of the conventional conductor such as copper and the like, the volume and the weight of a transformer winding made of the superconducting wire are far smaller than those of the conventional transformer, so that the superconducting transformer has the advantages of small volume and light weight. With the progress of superconducting wire technology and cooling technology, especially the application of high-temperature superconducting wire technology, the efficiency of a superconducting transformer can be 0.1% -0.5% higher than that of a conventional transformer. In addition, in the superconducting transformer, liquid nitrogen or liquid helium is both a coolant and an insulating part, has good insulating property, is incombustible, and has extremely low temperature, so that the superconducting transformer has good flame retardant property.
However, the existing superconducting transformers still have some problems. For example, a superconducting coil in a superconducting transformer is immersed in liquid nitrogen in a dewar, but the conventional dewar keeps the superconducting coil in a superconducting temperature region, so that the heat loss is high, the reliability is low, the heat preservation performance is poor, the structural rigidity is poor, and the like, which greatly influence the application effect of the superconducting transformer.
Therefore, a dewar with good structural rigidity, high reliability, good heat preservation effect and low heat loss is needed to meet the technical requirements of the superconducting transformer and improve the performance of the superconducting transformer.
SUMMERY OF THE UTILITY MODEL
To at least some technical problem as described above, the utility model aims to provide a dewar for superconducting power device, this dewar can show the leakproofness of reinforcing box to show reinforcing heat-proof quality, reduce its heat loss, and can effectively improve the structural strength of box, the reliability is high.
Therefore, according to the present invention, a dewar for a superconducting power device is provided, comprising: the liquid nitrogen storage tank is characterized by comprising a tank body for containing liquid nitrogen, wherein the top of the tank body is formed into an open end; a top cover connected with the opening end of the box body in a sealing mode; an inner tube for passing a core limb of the superconducting power device therethrough, the inner tube being disposed to pass transversely through the tank; the first end plate and the second end plate are arranged at the two transverse ends of the box body; the two ends of the inner cylinder are respectively and fixedly connected with the first end plate and the second end plate, and the box body, the top cover and the inner cylinder are all arranged into a double-wall structure with a vacuum heat insulation layer.
In a preferred embodiment, the box body comprises a box body outer shell and a box body inner shell which is arranged in the box body outer shell and is spaced from the box body outer shell at equal intervals, and a closing-in mounting plate is hermetically connected to the upper ends of the box body inner shell and the box body outer shell, so that a sealed vacuum insulation layer is formed between the box body inner shell and the box body outer shell.
In a preferred embodiment, a sealing gasket is arranged between the top cover and the closing-in mounting plate, and a lip is arranged on the end face, in contact with the closing-in mounting plate, of the sealing gasket.
In a preferred embodiment, the top cover comprises a top cover inner plate and a top cover outer plate, the top cover inner plate and the top cover outer plate are both provided with a circle of protrusions along corresponding end edges, and the top cover inner plate and the top cover outer plate are bonded with each other through the corresponding protrusions, so that a sealed vacuum heat insulation layer is formed between the top cover inner plate and the top cover outer plate.
In a preferred embodiment, the inner cylinder comprises an outer wall cylinder and an inner wall cylinder concentrically arranged in the outer wall cylinder, and annular sealing rings are respectively arranged at two ends of the outer wall cylinder and the inner wall cylinder, so that an annularly sealed vacuum heat insulation layer is formed between the outer wall cylinder and the inner wall cylinder.
In a preferred embodiment, both ends of the inner cylinder are respectively and fixedly connected with the first end plate and the second end plate through inner cylinder mounting plates.
In a preferred embodiment, circular holes for mounting the inner cylinder are respectively and correspondingly arranged on the transverse side wall of the box body, the first end plate and the second end plate.
In a preferred embodiment, the seal ring is provided with an outer chamfer, the round holes on the first end plate and the second end plate are provided with inner chamfers, the outer chamfer and the inner chamfers can correspondingly form a groove, and a sealant is coated in the groove.
In a preferred embodiment, ribs extending transversely along the bottom plate of the box body are arranged at the bottom of the box body, and the cross section of each rib is semicircular.
In a preferred embodiment, a solid stack is arranged on the inner wall of the box body, and the nut supporting seat is embedded in the solid stack.
Drawings
The present invention will be described with reference to the accompanying drawings.
Fig. 1 schematically shows the structure of a dewar for a superconducting electric power device according to the present invention.
Figure 2 is an exploded view of the dewar shown in figure 1.
Figure 3 is an exploded view of the tank in the dewar of figure 1.
Figure 4 schematically illustrates the structure of the inner barrel in the dewar shown in figure 2.
Fig. 5 schematically shows a seal installation structure of both ends of the inner cylinder shown in fig. 4.
Figure 6 schematically illustrates the construction of the roof in the dewar of figure 2.
In the present application, all the figures are schematic and are only intended to illustrate the principles of the present invention and are not drawn to scale.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
In this application, the Y-axis direction in fig. 1 is defined as the lateral direction.
Fig. 1 and 2 schematically show the structure of a dewar 100 for a superconducting power device according to the present invention. As shown in fig. 1, the dewar 100 includes a tank 10, a top of the tank 10 is formed as an open end, and the tank 10 is used for containing liquid nitrogen and installing parts such as superconducting coils. A top cover 20 is provided at an opening end of the casing 10, and a gasket 30 capable of fitting the opening end of the casing 10 is provided between the top cover 20 and the casing 10 to form a seal. Therefore, a closed space for containing liquid nitrogen is formed by the box body 10 and the top cover 20, the sealing performance of the box body 10 is guaranteed through the sealing gasket 30, and the liquid nitrogen is prevented from leaking. At both lateral ends of the case 10, there are provided a first end plate 11 and a second end plate 12, and the first end plate 11 and the second end plate 12 are used to provide support to the case 10.
As shown in fig. 2, dewar 100 further includes an inner barrel 40. The inner cylinder 40 is disposed transversely across the housing 10 so as to extend transversely through the housing 10. The inner cylinder 40 is used for installing a core limb in a superconducting power device, so that the core limb passes through the inner cylinder 40, and thus, the core limb passes through the box body 10 transversely without contacting liquid nitrogen in the box body 10. In the present embodiment, both ends of the inner tube 40 are respectively fastened to the first end plate 11 and the second end plate 12. In the embodiment shown in fig. 2, the dewar 100 is provided with two inner cylinders 40, and the two inner cylinders 40 are disposed parallel to each other and transversely penetrate the tank 10. It will be understood, of course, that a plurality of inner barrels 40 can be provided as desired.
Fig. 3 shows an exploded view of the enclosure 10. As shown in fig. 3, the tank 10 includes a tank outer shell 13 and a tank inner shell 14, and the tank inner shell 14 is disposed inside the tank outer shell 13 and spaced apart from the tank outer shell 13 at equal intervals. And a closing-in mounting plate 15 is arranged at the upper ends of the box body outer shell 13 and the box body inner shell 14. The closing-in mounting plate 15 is used for connecting the box outer shell 13 and the box inner shell 14, and bonding the box outer shell 13, the box inner shell 14 and the closing-in mounting plate 15 into a whole in a bonding mode. Thereby, a sealed vacuum insulation layer is formed between the tank outer casing 13 and the tank inner casing 14. The vacuum heat insulation layer can effectively reduce heat leakage of the box body 10 and enhance the heat insulation effect of the box body 10.
In this embodiment, a through passage (not shown) is provided at the portion of the adhesive bonding of the tank outer shell 13 and the tank inner shell 14, so that the vacuum insulation layer of the entire tank 10 is completely penetrated. Meanwhile, a vacuumizing interface (not shown) is arranged on the side wall of the box outer shell 13 and is used for vacuumizing the vacuum insulation layer between the box outer shell 13 and the box inner shell 14.
As shown in fig. 3, the first and second end plates 11 and 12 are installed at both lateral ends of the case 10 in a built-in structure, and the first and second end plates 11 and 12 wrap the case 10 to provide support to the case 10.
In this embodiment, a circular hole is formed in the lateral side wall of the casing 10 to penetrate the casing side wall, and the circular hole is used for mounting the inner cylinder 40. As shown in fig. 3, corresponding circular holes are provided in the respective side wall regions of the case outer shell 13, the case inner shell 14, and the first end plate 11 and the second end plate 12 of the case 10. In one embodiment, the case outer shell 13, the case inner shell 14, and the first end plate 11 and the second end plate 12 of the case 10 are each provided with two circular holes spaced apart from each other. The inner cylinder 40 passes through the case 10 and both ends thereof are fitted into the circular hole of the case 10, while both ends of the inner cylinder 40 are fixedly fitted with the first and second end plates 11 and 12.
To increase the structural rigidity of the tank 10, a plurality of ribs 16 are provided at the bottom of the tank 10. A plurality of ribs 16 are disposed at the bottom of the inner housing 14 and extend laterally along the bottom of the inner housing 14. In one embodiment, the cross-sectional shape of the ribs 16 is configured as a semi-circle. Meanwhile, a plurality of solid stacks 17 are arranged on the inner wall of the inner shell 14 of the box body, and nut support seats are pre-embedded in the solid stacks 17 and used for installing relevant components in the box body, such as superconducting coils, sub-heat exchangers and the like. The ribs 16 and the solid stacks 17 can effectively enhance the structural rigidity of the inner shell 14 of the box body and reduce the structural deformation of the inner shell, thereby effectively enhancing the rigidity performance of the Dewar 100.
As shown in fig. 4, the inner cylinder 40 includes an outer wall cylinder 41 and an inner wall cylinder 42 concentrically disposed inside the outer wall cylinder 41. Annular sealing rings 43 are respectively arranged at two ends of the outer wall cylinder 41 and the inner wall cylinder 42, so that an annular closed vacuum heat insulation layer is formed between the outer wall cylinder 41 and the inner wall cylinder 42. The core limb in the superconducting power device passes through the inner barrel 40, so that the annular vacuum heat insulation layer can effectively insulate heat, heat leakage is reduced, and the heat insulation performance of the whole system is enhanced.
Fig. 5 schematically shows a seal mounting structure of an end portion of the inner tube 40. As shown in fig. 5, two ends of the inner cylinder 40 are fixedly and hermetically connected to the first end plate 11 and the second end plate 12 through the sealing rings 43. The seal ring 43 is provided with an outer chamfer and the round holes on the first end plate 11 and the second end plate 12 are both provided with an inner chamfer. The sealing ring 43 and the first end plate 11 and the second end plate 12 are correspondingly mounted at two ends of the inner cylinder 40, and after alignment and mounting, the outer chamfer of the sealing ring 43 and the inner chamfer of the round holes of the first end plate 11 and the second end plate 12 correspondingly form a groove. And smearing the low-temperature-resistant sealant 45 in the groove until the groove is filled with the low-temperature-resistant sealant 45. Therefore, effective sealing is formed between both ends of the inner cylinder 40 and the first and second end plates 11 and 12, thereby ensuring the sealing performance of the case 10.
According to the utility model discloses, the both ends of inner tube 40 form fixed mounting through inner tube mounting panel 50 respectively. The inner cylinder mounting plate 50 is circular, and the inner cylinder mounting plate 50 is provided with a plurality of mounting holes. The installation holes are arranged into two circles and are uniformly distributed in the circumferential direction. Meanwhile, threaded blind holes capable of corresponding to mounting holes of the outer ring on the inner cylinder mounting plate 50 are formed in the peripheries of the round holes of the first end plate 11 and the second end plate 12, and threaded blind holes capable of corresponding to mounting holes of the inner ring on the inner cylinder mounting plate 50 are formed in the seal ring 43. After the mounting holes of the inner cylinder mounting plate 50 are aligned with the threaded blind holes of the first end plate 11, the second end plate 12 and the seal ring 43, screws 51 are respectively fastened and mounted in the threaded blind holes through the mounting holes, so that the inner cylinder 40 is fastened and mounted with the box 10 through the inner cylinder mounting plate 50, and a seal is formed. The sealing connection mode of the sealing ring 43 and the inner cylinder mounting plate 50 can effectively ensure that the inner cylinder mounting plate 50 compresses and seals the sealing ring 43, thereby ensuring the sealing performance of a vacuum heat insulation layer in the inner cylinder 40 and the sealing performance between the inner cylinder 40 and the box body 10, ensuring that liquid nitrogen is not leaked, and further enhancing the heat insulation performance of the Dewar 100.
According to the utility model discloses, top cap 20 also adopts bilayer structure. As shown in fig. 6, the roof 20 includes a roof inner panel 21 and a roof outer panel 22. The top cover inner plate 21 and the top cover outer plate 22 are both provided with a circle of bulges along the corresponding end surface edges, and the top cover inner plate 21 and the top cover outer plate 22 are bonded through the corresponding bulges, so that a closed vacuum heat insulation layer is formed between the top cover inner plate 21 and the top cover outer plate 22. The vacuum insulation layer can effectively enhance the heat insulation performance of the top cover 20. An evacuation port 23 (see fig. 2) is provided in the central region of the outer plate 22 of the top cover, and the evacuation operation of the entire tank can be completed through the evacuation port 23.
In the present embodiment, the top cover 20 is tightly connected to the box body, and a gasket 30 is disposed between the top cover 20 and the box body 10, and the gasket 30 is in close contact with the upper end surface of the closing-in mounting plate 15 disposed at the upper end opening portion of the box body 10. In one embodiment, the top cover 20 is fastened to the upper end of the case 10 by bolts. The gasket 30 is provided in a shape corresponding to the edge of the top cover, and a lip is provided on the end surface of the gasket 30 contacting the closing-up mounting plate 15. The sealing gasket 30 can form effective compression sealing between the top cover 20 and the closing-in mounting plate 15, so that the sealing performance between the top cover 20 and the box body 10 is ensured, and the liquid nitrogen is prevented from leaking. Therefore, the box body 10 can effectively ensure that the superconducting coil is soaked in liquid nitrogen in the box body 10, and the superconducting coil is kept in a superconducting temperature area, so that stable superconducting performance is obtained, and effective guarantee is provided for the superconducting coil to maintain the liquid nitrogen temperature area and obtain the stable superconducting performance.
According to the utility model discloses a be applied to under the operating mode condition that superconducting transformer iron core level was placed for superconducting power device's dewar 100. In the use process, the Dewar 100 is horizontally placed, and the vacuum heat insulation layers of the box body 10, the top cover 20 and the inner barrel 40 can obviously reduce heat leakage of the Dewar box body. Meanwhile, there is a height difference between the liquid level of the liquid nitrogen inside the top cover 20 and the tank 10, so as to form a gas insulation layer, further reducing the heat leakage of the whole dewar to a lower level.
According to the utility model discloses a dewar 100 for superconducting power device, its box 10, be used for the top cap 20 and the inner tube 40 of sealed box all set to the double-walled structure that has the vacuum insulation layer to can show and reduce the heat leakage. The dewar 100 can effectively ensure that the superconducting coil is soaked in liquid nitrogen in the box body 10, and the superconducting coil is kept in a superconducting temperature region, so that stable superconducting performance is obtained, an effective guarantee is provided for the superconducting coil to maintain the liquid nitrogen temperature region and obtain the stable superconducting performance, and the heat insulation performance of the dewar 100 is obviously enhanced. The dewar box 10 is connected with the top cover 20 and the inner cylinder 40 in a good sealing manner, so that the box 10 has good sealing performance, thereby effectively avoiding liquid nitrogen leakage and reducing heat leakage, further enhancing the heat insulation performance of the dewar 100, and having high reliability and low heat loss. In addition, the Dewar 100 has the advantages of simple structure, good structural rigidity, good heat preservation effect and low cost.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dewar for a superconducting electrical device, comprising:
a tank (10) for containing liquid nitrogen, the top of the tank being formed as an open end;
a top cover (20) connected with the opening end of the box body in a sealing manner;
an inner tube (40) for passing a core limb of the superconducting power device therethrough, the inner tube being disposed to pass transversely through the tank; and
a first end plate (11) and a second end plate (12) which are arranged at the two transverse ends of the box body;
the two ends of the inner cylinder are respectively and fixedly connected with the first end plate and the second end plate, and the box body, the top cover and the inner cylinder are all arranged into a double-wall structure with a vacuum heat insulation layer.
2. The dewar according to claim 1, wherein the cabinet comprises a cabinet outer shell (13) and a cabinet inner shell (14) disposed within and spaced apart from the cabinet outer shell at equal intervals, a closing-in mounting plate (15) being sealingly connected to upper ends of the cabinet inner shell and the cabinet outer shell, thereby forming a hermetic vacuum insulation layer between the cabinet inner shell and the cabinet outer shell.
3. The dewar according to claim 2, wherein a sealing gasket (30) is provided between the top cover and the mouth-in mounting plate, and a lip is provided on an end surface of the sealing gasket contacting the mouth-in mounting plate.
4. The dewar according to claim 1 or 3, wherein the top cover comprises an inner top cover plate (21) and an outer top cover plate (22), each provided with a ring of protrusions along respective end edges, the inner top cover plate and the outer top cover plate being bonded to each other by the corresponding protrusions, thereby forming a hermetic vacuum insulation layer between the inner top cover plate and the outer top cover plate.
5. The dewar according to claim 1, wherein the inner tube comprises an outer wall tube (41) and an inner wall tube (42) concentrically arranged within the outer wall tube, and annular sealing rings (43) are provided at both ends of the outer wall tube and the inner wall tube, respectively, thereby forming an annularly sealed vacuum insulation layer between the outer wall tube and the inner wall tube.
6. The dewar according to claim 1 or 5, wherein both ends of the inner tube are in a fastening connection with the first and second end plates by inner tube mounting plates (50), respectively.
7. The dewar according to claim 5, wherein round holes for mounting the inner cylinder are respectively provided on the lateral side wall of the box body, the first end plate and the second end plate correspondingly.
8. The dewar according to claim 7, wherein said sealing ring is provided with an outer chamfer, said round holes on said first end plate and said second end plate are provided with an inner chamfer, said outer chamfer and said inner chamfer being capable of correspondingly forming a groove, a sealant (45) being applied inside said groove.
9. Dewar according to claim 1, characterised in that at the bottom of the tank ribs (16) are provided extending transversely to the bottom of the tank, the cross-sectional shape of which ribs is provided as a semicircle.
10. The dewar according to claim 1, wherein a solid stack (17) is provided on the inner wall of the box body, the solid stack having a nut support seat embedded therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921858481.4U CN210865767U (en) | 2019-10-31 | 2019-10-31 | Dewar for superconducting power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921858481.4U CN210865767U (en) | 2019-10-31 | 2019-10-31 | Dewar for superconducting power device |
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| Publication Number | Publication Date |
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| CN210865767U true CN210865767U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921858481.4U Active CN210865767U (en) | 2019-10-31 | 2019-10-31 | Dewar for superconducting power device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690023A (en) * | 2019-10-31 | 2020-01-14 | 株洲联诚集团控股股份有限公司 | Dewar for superconducting power device |
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2019
- 2019-10-31 CN CN201921858481.4U patent/CN210865767U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690023A (en) * | 2019-10-31 | 2020-01-14 | 株洲联诚集团控股股份有限公司 | Dewar for superconducting power device |
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