CN207834045U - A kind of DC superconducting current limiter cooling structure - Google Patents
A kind of DC superconducting current limiter cooling structure Download PDFInfo
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- CN207834045U CN207834045U CN201820255481.4U CN201820255481U CN207834045U CN 207834045 U CN207834045 U CN 207834045U CN 201820255481 U CN201820255481 U CN 201820255481U CN 207834045 U CN207834045 U CN 207834045U
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- tank body
- manhole
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- current limiter
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Abstract
The utility model is related to a kind of DC superconducting current limiter cooling structures, by tank body and it is connected to the double-layer vacuum pumping structure that the inlet-outlet line part on tank body top formed, double-layer vacuum pumping construction interior places magnet and cooling liquid, interlayer is vacuum layer, manhole is set to one side end of tank body, and the connecting portion of tank body and inlet-outlet line part uses lead angle；Double-layer vacuum pumping construction interior is additionally provided with shielding case and cardboard, and wherein shielding case is the structure coordinated with tank body internal layer, and upper part is equipped with multiple gas vents, and lower part is equipped with multiple inlet openings；Cardboard is set on the outside of shielding case, is and the matched structure of shielding case, couch board suit.The utility model is conducive to superconducting magnet heat dissipation, accelerates to restore superconducting state；Outgoing line part is to extend rectangular parallelepiped structure, increase when being quickly cooled down bubble formation regions shield shell avoid bubble electric discharge the distance between to ground, high pressure AC and DC insulate Commpensation And Adaptation when solution is quickly cooled down.
Description
Technical field
The utility model is related to a kind of DC superconducting current limiter, specially a kind of DC superconducting current limiter cooling structure.
Background technology
Flexible DC power transmission is the important means that the following non-renewable resources are accessed and interconnected on a large scale on a large scale.But at present
The existing soft straight power transmission engineering of large size does not have DC line fault Scavenging activity.Based superconductor monopolizing characteristic grows up
Superconducting direct current limiter can inhibit line short circuit current, reduces the technologies such as high voltage DC breaker switch off time, Breaking capacity and wants
It asks, to promote reliability and the safety of the soft straight transmission system of large capacity, there is notable technical advantage and application value.
In the world, the stages such as superconductive current limiter development experience experiment grade, distribution grade and transmission of electricity grade prototype design, domestic phase
It closes research to make a breakthrough in terms of distribution grade principle and key technology first, for example, the 10.5kV/ that Chinese Academy of Sciences electrician is developed
2kA bridge circuit type superconductings current limiter put into operation in 2005 in Hunan Electric Grid；The 35kV saturations that Beijing Yun electricity Ying Na companies develop
Core type superconductive current limiter put into operation in 2008 in Yunnan Power System.
With the rapid development of Chinese national economy, demand of the people to DC circuit is also higher and higher, protects electric appliance
Overload protection, short-circuit protection require it is also very stringent.To ensure power equipment safety operation, it is desirable that protection electric appliance is accurate, can
It leans on, quick disengagement failure electric current.Existing superconductive current limiter is mostly directed to AC system, and there are DC break down voltages cannot be satisfied system
The phenomenon that demand, is not applied for straight-flow system, and due to not having the condition of zero passage when short circuit occurs for straight-flow system, then cut-offs
Direct-current arc is more difficult than under AC conditions.
Utility model content
Cannot be directly applied to direct current field for existing high-voltage alternating superconductive current limiter, and there are DC break down voltages can not
The phenomenon that meeting system requirements, the utility model provide a kind of DC superconducting limit can be applied to high voltage direct current superconducting current-limiting system
Flow device cooling structure.
A kind of DC superconducting current limiter cooling structure of the utility model, include by tank body and be connected to tank body top into
The double-layer vacuum pumping structure that outgoing line part is formed, double-layer vacuum pumping construction interior place magnet and cooling liquid, and interlayer is vacuum
Layer, manhole are set to one side end of tank body, and the connecting portion of tank body and inlet-outlet line part uses lead angle.
Double-layer vacuum pumping construction interior is additionally provided with shielding case and cardboard, and wherein shielding case is the knot coordinated with tank body internal layer
Structure, upper part are equipped with multiple gas vents, and lower part is equipped with multiple inlet openings；Cardboard is set on the outside of shielding case, to match with shielding case
The structure of conjunction, couch board suit.
Inlet-outlet line part is equipped with double-layer seal flange into and out of line position, that is, seals outward flange and sealing inner flange,
The outer diameter of middle sealing inner flange is less than tank body outer layer inlet-outlet line aperture；It seals inner flange to be tightly connected with tank body internal layer, sealing is outer
Flange is tightly connected by mounting flange and tank body outer layer.
Mounting flange fixes as one with tank body outer layer, and sealing outward flange is connect with mounting flange counterbore, seals inner flange
It is connect with tank body internal layer counterbore.
Manhole part also uses Double-layer flange structure, i.e. manhole outward flange and manhole inner flange, wherein manhole inner flange
Outer diameter be less than tank body outer layer manhole aperture, with tank body manhole internal layer mounting flange be tightly connected, manhole outward flange by manhole outside
Layer mounting flange is tightly connected with tank body outer layer.
Manhole installation outward flange fixes as one with tank body outer layer, and manhole outward flange connects with manhole installation outward flange counterbore
It connects；Manhole installation inner flange fixes as one with tank body internal layer, and manhole inner flange is connect with manhole installation inner flange counterbore.
Tank body is axially horizontal positioned, and both side ends are the cambered surface of rounding off.
Inlet-outlet line part is the rectangular parallelepiped structure extended by tank body top, and long axis direction size meets inlet-outlet line insulation
Required distance.
Tank body part is hydraulically full, and the rectangular parallelepiped structure extended is liquid, gas mixing changeover portion.
The utility model has the advantages that and advantage：
1. the utility model since shielding case uses upper and lower part trepanning, is accelerated bubble and is risen, accelerating liquid flow velocity, favorably
It radiates in superconducting magnet, accelerates to restore superconducting state；Since outgoing line part is using extension rectangular parallelepiped structure, when increase is quickly cooled down
Bubble formation regions shield shell can avoid bubble electric discharge phenomenon, high pressure is cross, straight when solution is quickly cooled down the distance between to ground
Stream insulation Commpensation And Adaptation.
2. the utility model improves DC break down voltage ability due to the structure using multilayer insulation paper web；Due to using double-deck
Flange arrangement facilitates installation, and reduces leakage heat.
3. the utility model provides a kind of insulation tolerance solution can be applied to high voltage direct current superconducting current-limiting system, fill out
Domestic and international technological gap is mended.
Description of the drawings
Fig. 1 is the utility model DC superconducting current limiter cooling structure schematic diagram；
Fig. 2 is Double-layer flange structural schematic diagram in the utility model.
Wherein, 1 is tank body outer layer, and 2 be tank body internal layer, and 3 be shielding case, and 4 be inlet-outlet line part, and 5 be tank body, and 6 be sealing
Outward flange, 7 be sealing inner flange, and 8 be casing, and 9 be manhole outward flange, and 10 be manhole inner flange, and 11 be seal washer, and 12 be spiral shell
Stud structure, 13 be mounting flange, and 14 be insulating board, and 15 be magnet, and 16 install inner flange for manhole, and 17 install outer method for manhole
It is blue.
Specific implementation mode
As shown in Figure 1, a kind of DC superconducting current limiter cooling structure of the utility model, including by tank body 5 and be connected to
The double-layer vacuum pumping structure that the inlet-outlet line part 4 on 5 top of tank body is formed, double-layer vacuum pumping construction interior place magnet 15 and cooling
Liquid, interlayer are vacuum layer, and manhole is set to 5 one side end of tank body, and the connecting portion of tank body 5 and inlet-outlet line part 4 uses lead angle.
In the present embodiment, in order to avoid there is corner discharge, the connecting portion of tank body 5 and inlet-outlet line part 4 uses lead angle.
Double-layer vacuum pumping construction interior 2 is additionally provided with magnet 15, shielding case 3 and insulating board 14, wherein shielding case 3 be with
The structure that magnet 15 coordinates, upper part are equipped with the gas vent that 1-50 area is not less than 100 square millimeters, and lower part is equipped with 1-50
Area is not less than 100 square millimeters of inlet opening；Insulating board 14 is set to 3 outside of shielding case, more to be matched with shielding case 3
The structure that layer insulating board 14 is set with.
In the present embodiment, to have avoided bubble electric discharge phenomenon, in 3 top trepanning of shielding case, gas can be discharged.In order to
Accelerating liquid flow velocity is conducive to radiate, in 3 lower part trepanning of shielding case.To improve insulation breakdown tolerance, using multi-ply tissue
Plate divides oil clearance, and it is 0.5-20mm that the present embodiment, which uses 2-15 layers of insulating board 14, every layer of 14 thickness of insulating board,.
As shown in Fig. 2, inlet-outlet line part 4 is equipped with double-layer seal flange into and out of line position, that is, seal 6 He of outward flange
Inner flange 7 is sealed, wherein the outer diameter of sealing inner flange 6 is less than 1 inlet-outlet line aperture of tank body outer layer；Sealing outward flange 6 passes through installation
Flange 13 is tightly connected with tank body outer layer 1.
Mounting flange 13 fixes as one with tank body outer layer 1, and sealing outward flange 6 is connect with 13 counterbore of mounting flange, is sealed
Inner flange 7 is connect with 2 counterbore of tank body internal layer.
Manhole part uses Double-layer flange structure, i.e. manhole outward flange 9 and manhole inner flange 10, wherein manhole inner flange
10 outer diameter is less than 1 manhole aperture of tank body outer layer；Manhole installation outward flange 17 fixes as one with tank body outer layer 1, the outer method of manhole
Orchid 9 connect with manhole installation 17 counterbore of outward flange；Manhole installation inner flange 16 fixes as one with tank body internal layer 2, method in manhole
Orchid 10 connect with manhole installation 16 counterbore of inner flange.
In the present embodiment, in order to realize that double-layer seal, inlet-outlet line part 4 use double-layer seal flange structure, for the ease of
The outer diameter of installation, sealing inner flange 7 should be less than tank body outer layer aperture, to ensure that sealing inner flange 7 can be suitable by tank body outer hole
Profit enters 5 interlayer of tank body, carries out the sealing installation of 5 internal layer of tank body.
Tank body 5 is axial horizontal positioned, and both side ends are the cambered surface of rounding off.
Inlet-outlet line part 4 is the rectangular parallelepiped structure extended by 5 top of tank body, and it is exhausted that long axis direction size meets inlet-outlet line
Edge required distance.
Tank body 5 is partially filled with liquid, and inlet-outlet line part 4 is liquid, gas mixing changeover portion.
The assembly method of the utility model DC superconducting current limiter cooling structure, by 5 side manhole flange 9 of tank body into
The internal installation of row.The fixed installation of shielding case 3, magnet 15, insulating board 14：Magnet 15 is main body portion, therefore inside is first
Installation is fixed to magnet 15, is uniform electric field, shielding case 3 is fixedly connected in 15 periphery of magnet, then, according to insulation distance
It is required that installing multilayer insulation cardboard 14 successively in 3 periphery of shielding case, DC break down voltage ability is improved；The fixed peace of inlet-outlet line part 4
Dress：The utility model uses Double-layer flange structure, carries out counterbore spiral shell to sealing inner flange 7 and tank body internal layer 2 in tank body 5 first
Bolt is then outer by mounting flange 13 in tank body 5 filling, and will seal outward flange 6 with 1 countersunk bolts of tank body outer layer dress；Manhole
Sealing installation：First outside tank body 5, countersunk bolts first are carried out filling, then in tank to manhole inner flange 10 and tank body internal layer 2
Body 5 is outer to carry out countersunk bolts dress to manhole outward flange 9 and tank body outer layer 1.
Claims (9)
1. a kind of DC superconducting current limiter cooling structure, it is characterised in that：Include by tank body and be connected to tank body top into
The double-layer vacuum pumping structure that outgoing line part is formed, double-layer vacuum pumping construction interior place magnet and cooling liquid, and interlayer is vacuum
Layer, manhole are set to one side end of tank body, and the connecting portion of tank body and inlet-outlet line part uses lead angle.
2. DC superconducting current limiter cooling structure as described in claim 1, it is characterised in that：Double-layer vacuum pumping construction interior
It is additionally provided with shielding case and cardboard, wherein shielding case is the structure coordinated with tank body internal layer, and upper part is equipped with multiple gas vents, under
Portion is equipped with multiple inlet openings；Cardboard is set on the outside of shielding case, is and the matched structure of shielding case, couch board suit.
3. DC superconducting current limiter cooling structure as described in claim 1, it is characterised in that：Inlet-outlet line part into and out of
Line position is equipped with double-layer seal flange, that is, seals outward flange and sealing inner flange, wherein the outer diameter of sealing inner flange is less than tank
Volume surrounding inlet-outlet line aperture；Inner flange and tank body internal layer is sealed to be tightly connected, sealing outward flange by mounting flange and tank body outside
Layer is tightly connected.
4. DC superconducting current limiter cooling structure as described in claim 3, it is characterised in that：Mounting flange and tank body outer layer
It fixes as one, sealing outward flange is connect with mounting flange counterbore, and sealing inner flange is connect with tank body internal layer counterbore.
5. DC superconducting current limiter cooling structure as described in claim 1, it is characterised in that：Manhole part also uses bilayer
Flange arrangement, i.e. manhole outward flange and manhole inner flange, wherein the outer diameter of manhole inner flange is less than tank body outer layer manhole aperture,
It is tightly connected with tank body manhole internal layer mounting flange, manhole outward flange is connected by manhole outer layer mounting flange and the sealing of tank body outer layer
It connects.
6. DC superconducting current limiter cooling structure as described in claim 5, it is characterised in that：Manhole installs outward flange and tank
Volume surrounding fixes as one, and manhole outward flange is connect with manhole installation outward flange counterbore；Manhole installs inner flange and tank body internal layer
It fixes as one, manhole inner flange is connect with manhole installation inner flange counterbore.
7. DC superconducting current limiter cooling structure as described in claim 1, it is characterised in that：Tank body is axially horizontal positioned,
Both side ends are the cambered surface of rounding off.
8. DC superconducting current limiter cooling structure as described in claim 1, it is characterised in that：Inlet-outlet line part is by tank body
The rectangular parallelepiped structure that top is extended, long axis direction size meet inlet-outlet line insulation distance requirement.
9. DC superconducting current limiter cooling structure as described in claim 8, it is characterised in that：Tank body part is hydraulically full,
The rectangular parallelepiped structure extended is liquid, gas mixing changeover portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820255481.4U CN207834045U (en) | 2018-02-13 | 2018-02-13 | A kind of DC superconducting current limiter cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820255481.4U CN207834045U (en) | 2018-02-13 | 2018-02-13 | A kind of DC superconducting current limiter cooling structure |
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| CN207834045U true CN207834045U (en) | 2018-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183013A (en) * | 2018-02-13 | 2018-06-19 | 特变电工股份有限公司 | A kind of DC superconducting current limiter cooling structure and its assembly method |
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2018
- 2018-02-13 CN CN201820255481.4U patent/CN207834045U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183013A (en) * | 2018-02-13 | 2018-06-19 | 特变电工股份有限公司 | A kind of DC superconducting current limiter cooling structure and its assembly method |
| CN108183013B (en) * | 2018-02-13 | 2024-06-25 | 特变电工股份有限公司 | Cooling structure for direct current superconducting current limiter and assembly method thereof |
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