CN202601221U - Ceramic outgoing line sealing structure - Google Patents
Ceramic outgoing line sealing structure Download PDFInfo
- Publication number
- CN202601221U CN202601221U CN2012202301071U CN201220230107U CN202601221U CN 202601221 U CN202601221 U CN 202601221U CN 2012202301071 U CN2012202301071 U CN 2012202301071U CN 201220230107 U CN201220230107 U CN 201220230107U CN 202601221 U CN202601221 U CN 202601221U
- Authority
- CN
- China
- Prior art keywords
- ceramic
- outgoing line
- soldering
- sealing structure
- kovar alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a ceramic outgoing line sealing structure. A conducting rod is sleeved with a ceramic insulation sleeve, a second kovar alloy sleeve is sleeved and fixed on a block platform at the rear part of the conducting rod by brass soldering, the ceramic insulation sleeve is externally sleeved with a stainless steel sleeve, and a first kovar alloy sleeve is sleeved and fixed on the stainless steel sleeve by brass soldering. The sealing structure disclosed by the utility model is characterized in that the contact position between elements is sealed by brass soldering, and the soldering lines are tested in strict hydrostatic test and helium leak test. The ceramic outgoing line sealing structure can prevent the thermal stress between the elements of the outgoing line better, thereby playing a role in long-term sealing. The ceramic outgoing line sealing structure uses brass soldering, thereby effectively solving the service life problems and technical problems of aging and loosening of a sealing gasket in the mechanical sealing.
Description
Technical field
The utility model relates to a kind of ceramic extension line hermetically-sealed construction.
Background technology
At present, main pump version ripe in the reactor coolant pump has two kinds, and a kind of is the axle envelope main pump of tape spool envelope, and another kind is the canned motor pump that does not have the axle envelope.Along with nuclear power security and reliability are improved constantly, because complicated, the factors such as backup system is more, installation and maintenance inconvenience of axle envelope main pump sealing system, the incompatible new nuclear safety of its security and reliability needs.Advantages such as a canned motor pump that does not have the axle envelope has, non-maintaining are emerging technologies that replaces axle envelope main pump.
Canned motor pump motor stator winding is contained in the electric machine stand; Support is the ingredient of reactor cooling system pressure boundary; The extension line of winding is introduced power supply through the opening on the support; The extension line conducting rod generally all adopts the soft copper that conducts electricity very well to process; The insulating sleeve processed by insulating material between conducting rod and the support (metal) is isolated, and is the reactor coolant of high radiation because main pump transports, in case under the sealing failure accidents state cooling medium of high radiation with leaking out primary cooling system.The extension line hermetically-sealed construction of usefulness mostly used " O " type circle or sealing gasket to seal in the past, though these insulating material all have anti-irradiation ability, in long-term use, owing to the effect of thermal stress, occurred seal failure easily after operation a period of time.
The third generation large-scale advanced pressurized water reactor nuclear power plant reactor coolant pump has adopted a canned motor pump that does not have the axle envelope, require its designed life be 60 years non-maintaining, and the seal request of stator lead can satisfy the scene and vacuumize.This property seal request adopts traditional " O " type circle or sealing gasket to be difficult to satisfy life-span and designing requirement, needs a kind of security of design and the higher extension line hermetically-sealed construction of reliability.
Summary of the invention
The purpose of the utility model provides a kind of simple in structure, and is easy to make, the ceramic extension line hermetically-sealed construction that sealing reliability is high.The technical scheme of the utility model is: a kind of ceramic extension line hermetically-sealed construction; The outer suit ceramic insulation cover of conducting rod; The soldering of second kovar alloy cover suit is fixed on the shelves platform of conducting rod rear portion; The outer suit stainless steel sleeve of ceramic insulation cover, the soldering of first kovar alloy cover suit is fixed on the stainless steel sleeve.The hermetically-sealed construction of the utility model is that contact position adopts sealed with brazing between part, and weld seam is through the strict hydraulic testing and helium leak test.The utility model can be confirmed size according to different voltages with different grade and the conducting rod conductive area that needs, and its cross-section structure is as shown in Figure 1, and ceramic extension line is made up of conducting rod, ceramic insulation cover, kovar alloy, stainless steel sleeve.Ceramic insulation is placed between conducting rod and the stainless steel sleeve, curves the transition plate of " U " shape structure with kovar alloy in excessive position, welds with braze with the transition plate position contacting, and is as shown in Figure 2, realizes sealing.
The advantage of the utility model: the extension line of structure can be processed the size of different sizes; The sealing property that soldering has, transition " U " shape kovar alloy sheet can effectively be eliminated the thermal expansion stress between the inconsiderate material of extension line, and this utility model is simple in structure; Easy to make, simple installation.Improved the sealing reliability of motor.
Description of drawings
Fig. 1 is ceramic extension line model sectional view
Fig. 2 soldering filler position assumption diagram
Fig. 3 is " U " type structural drawing that cuts down the alloy cover
Embodiment
A kind of ceramic extension line hermetically-sealed construction as shown in Figure 1; Conducting rod 1 outer suit ceramic insulation cover 2; Second kovar alloy overlaps 5 suit solderings and is fixed on the conducting rod 1 rear portion shelves platform; Ceramic insulation cover 2 outer suit stainless steel sleeves 3, as shown in Figure 2, first kovar alloy overlaps 4 suit solderings and is fixed on the stainless steel sleeve 3.As shown in Figure 3, first kovar alloy cover, 4, second kovar alloy cover 5 is U type structure.
The utility model is made up of conducting rod 1, ceramic insulation cover 2, stainless steel sleeve 3, kovar alloy cover 4, kovar alloy cover 5.Conducting rod 1 inserts from ceramic insulation cover 2 big ends, and convex surface and ceramic insulation cover are close to, and can overlap 4 for alloy and be inserted in from the big end of conducting rod, forms first seal interface; Stainless steel sleeve 3 first covers can overlap 5 for alloy and overlap 2 small ends from ceramic insulation again and be inserted in, and are close to the ceramic insulation convex surface, form second seal interface.Fill with welding wire in kovar alloy and pottery, stainless steel sleeve, conducting rod position, and be welded to connect into an integral body in a vacuum.The extension line that welds reinstalls the electric machine stand aperture position, and stainless steel sleeve 3 welds with support again, reaches the seal request in 60 years in motor windings chamber.
The pottery extension line operates in the high radiation environment; During main pump motor bell housing generation leakage failure; The extension line inboard will be immersed in the reactor system cooling medium of high temperature, high pressure, and the extension line outside is in the atmospheric environment, and pressure differential will act on conducting rod, stainless steel sleeve, the ceramic insulation cover contact convex surface; The commissure is stressed very little, thereby has realized the sealing reliability of weld seam.When this extension line received thermal shock, the kovar alloy of " U " type can absorb each part thermal stress effectively, thereby proposed the security of sealing greatly.
Claims (2)
1. ceramic extension line hermetically-sealed construction; It is characterized in that: conducting rod (1) outer suit ceramic insulation cover (2); Second kovar alloy cover (5) the suit soldering is fixed on the shelves platform of conducting rod (1) rear portion; The outer suit stainless steel sleeve of ceramic insulation cover (2) (3), first kovar alloy cover (4) the suit soldering is fixed on the stainless steel sleeve (3).
2. a kind of ceramic extension line hermetically-sealed construction according to claim 1 is characterized in that: the first kovar alloy cover (4), the second kovar alloy cover (5) are " U " type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202301071U CN202601221U (en) | 2012-05-22 | 2012-05-22 | Ceramic outgoing line sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202301071U CN202601221U (en) | 2012-05-22 | 2012-05-22 | Ceramic outgoing line sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202601221U true CN202601221U (en) | 2012-12-12 |
Family
ID=47318751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202301071U Expired - Lifetime CN202601221U (en) | 2012-05-22 | 2012-05-22 | Ceramic outgoing line sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202601221U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969819A (en) * | 2012-12-14 | 2013-03-13 | 哈尔滨电气动力装备有限公司 | Insulation structure for outgoing line of wet winding motor |
| CN105869683A (en) * | 2016-04-01 | 2016-08-17 | 中国核动力研究设计院 | Ceramic lead device and molding method of device |
-
2012
- 2012-05-22 CN CN2012202301071U patent/CN202601221U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969819A (en) * | 2012-12-14 | 2013-03-13 | 哈尔滨电气动力装备有限公司 | Insulation structure for outgoing line of wet winding motor |
| CN102969819B (en) * | 2012-12-14 | 2015-04-01 | 哈尔滨电气动力装备有限公司 | Insulation structure for outgoing line of wet winding motor |
| CN105869683A (en) * | 2016-04-01 | 2016-08-17 | 中国核动力研究设计院 | Ceramic lead device and molding method of device |
| CN105869683B (en) * | 2016-04-01 | 2018-02-02 | 中国核动力研究设计院 | A kind of forming method of ceramic lead device and the device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |