CN114388153A - Glass-metal sealed electrical penetration assembly for pressurized water reactor containment - Google Patents
Glass-metal sealed electrical penetration assembly for pressurized water reactor containment Download PDFInfo
- Publication number
- CN114388153A CN114388153A CN202111616290.9A CN202111616290A CN114388153A CN 114388153 A CN114388153 A CN 114388153A CN 202111616290 A CN202111616290 A CN 202111616290A CN 114388153 A CN114388153 A CN 114388153A
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- CN
- China
- Prior art keywords
- glass
- assembly
- metal
- end plate
- sealing
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- 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.)
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
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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
Abstract
The invention discloses a glass-metal sealed electrical penetration assembly for a pressurized water reactor containment, which comprises a penetration cylinder, an end plate flange, a conductor assembly, a junction box and a pressure monitoring assembly, wherein the penetration cylinder is provided with a plurality of through holes; the penetrating cylinder is welded on the pre-buried pipeline of the containment, the end plate flanges are welded at the two ends of the penetrating cylinder respectively, the junction box is connected onto the end plate flanges, and the conductor assembly is arranged in the penetrating cylinder through the end plate pore passages at the two sides. The conductor assembly comprises a protective sleeve, a glass-metal sealing assembly, an inner insulating plug, an outer insulating plug and an insulating coated lead, the protective sleeve and the glass-metal sealing assembly are hermetically welded in a laser welding mode, and a contact pin of the glass-metal sealing assembly, the insulating coated lead and an external terminal strip are connected through the insulating plug. Compared with the original high polymer material sealed electric penetration piece, the high temperature and high pressure resistance, the irradiation resistance and the insulation airtightness of the electric penetration piece are obviously improved, and the electric penetration piece is easy to disassemble and replace.
Description
Technical Field
The invention relates to the technical field of manufacturing of penetration pieces, in particular to a glass-metal sealing electric penetration piece for a pressurized water reactor containment.
Background
The electrical penetration is a special electrical device installed on the wall of the reactor containment for the cable to pass through the containment. Under normal and various accident conditions, including earthquake and loss of coolant accident conditions, the electrical penetration assembly can ensure the integrity of the containment vessel of the reactor, prevent radioactive substances from leaking out, and simultaneously maintain the continuity of electrical signals inside and outside the containment vessel.
At present, most of electric penetration pieces for the nuclear reactor containment adopt organic high polymer materials to realize the sealing function of a conductor component, and the organic materials are easy to generate aging phenomena such as embrittlement, creep and the like during long-term operation and life prolonging operation, so that the risk of losing the sealing and insulating functions exists.
Disclosure of Invention
Aiming at the problems, the invention provides the glass-metal sealing electric penetration piece for the pressurized water reactor containment, which uses glass-metal sealing to replace organic material sealing, has longer service life, improves the sealing performance of a pressure boundary under the limit working condition, and reduces accidents and the risk of radioactive leakage after the accidents.
The technical scheme adopted by the invention for solving the technical problem is as follows: a glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel, the electrical penetration consisting essentially of: the pressure monitoring device comprises a through cylinder, an end plate flange, a conductor assembly, a junction box, a terminal strip supporting rod and a pressure monitoring assembly; the end plate flanges are arranged at two ends of the penetrating cylinder body, and end plate pore passages for mounting the conductor assemblies are arranged on the end plate flanges; the junction box is located the outside of end plate flange, be equipped with binding post row in the junction box, binding post row is fixed in through the clamp on the terminal row bracing piece.
Further, a ferrule type mechanical sealing assembly is adopted between the end plate pore passage and the conductor assembly for airtight sealing.
Further, the ferrule type mechanical seal assembly includes: screwing the nut, the transition ring and the soft metal clamping sleeve; during installation, an axial force is applied to the soft metal clamping sleeve through the screwing nut, the soft metal clamping sleeve deforms under the action of the axial force, and a gap between the conductor assembly and the end plate pore passage is filled up, so that the effect of airtight sealing is achieved.
Further, the conductor assembly comprises a protective sleeve, a glass-metal sealing assembly, an insulation coated lead, an inner insulation plug and an outer insulation plug, and the sealing performance and the structural strength of the protective sleeve are guaranteed by laser welding between the two ends of the protective sleeve and the glass-metal sealing assembly.
Further, the glass-metal sealing assembly comprises a stainless steel shell, sealing glass and oxygen-free copper pins; the stainless steel shell, the sealing glass and the oxygen-free copper contact pin are sequentially assembled in a sintering mold and sintered in a furnace to complete airtight insulation sealing; and the oxygen-free copper contact pin of the glass-metal sealing component is connected with the insulating coated lead through the inner insulating plug.
Furthermore, the external insulation plug comprises a shell, an insulator, a clamp spring type jack, a fastening nut and a cable cover, wherein the clamp spring type jack is in butt-plug connection with an oxygen-free copper contact pin in the glass-metal sealing assembly; the insulator is made of PEEK; and the oxygen-free copper contact pins of the glass-metal sealing assembly are connected with the wiring terminal strip through the external insulation plugs.
Furthermore, an external thread is arranged on a stainless steel shell of the glass-metal sealing assembly, and a fastening nut on the external insulation plug is fastened and loosened with the external thread through threaded connection.
The invention has the beneficial effects that: compared with the prior art, the glass-metal sealed electrical penetration piece for the pressurized water reactor containment vessel provided by the invention has the advantages that the high temperature resistance, high pressure resistance, irradiation resistance and insulating airtightness are obviously improved, and the glass-metal sealed electrical penetration piece is easy to disassemble and replace.
Drawings
Fig. 1 is a schematic structural view of an electrical penetration assembly provided in the present invention.
Fig. 2 is a schematic view of a connection structure of a conductor assembly and an end plate flange in the electrical penetration assembly provided by the present invention.
FIG. 3 is a schematic view of a glass-to-metal seal assembly in an electrical penetration assembly according to the present invention.
Fig. 4 is a schematic structural view of an external insulating plug in the electrical penetration assembly provided by the present invention.
Wherein, 1-penetrates through the cylinder body; 2-end plate flange; 3-end plate pore canal; 4-a conductor assembly; 5-a junction box; 6-terminal row support bar; 7-a pressure monitoring assembly; 8-a soft metal ferrule; 9-a transition ring; 10-screwing the nut; 41-a protective sleeve; 42-glass-metal seal assembly; 43-insulated covered wire; 44-inner insulating plug; 45-outer insulating plug; 421-stainless steel housing; 422-sealing glass; 423-oxygen free copper pin; 424-external threads; 451-cable cover; 452-an insulator; 453-circlip type socket; 454-a housing; 455-fastening a nut.
Detailed Description
The invention is further illustrated by the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Examples
A glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel, the electrical penetration consisting essentially of: the device comprises a cylinder body 1, an end plate flange 2, a conductor assembly 4, a junction box 5, a terminal strip support rod 6 and a pressure monitoring assembly 7; the end plate flanges 2 are arranged at two ends of the penetrating cylinder body 1, and end plate pore passages 3 for installing the conductor assemblies 4 are arranged on the end plate flanges 2; junction box 5 is located the outside of end plate flange 2, be equipped with binding post row in the junction box 5, binding post row is fixed in through the clamp on the terminal row bracing piece 6.
And a ferrule type mechanical sealing assembly is adopted between the end plate pore passage 3 and the conductor assembly 4 for airtight sealing. The ferrule type mechanical seal assembly comprises: screwing the nut 10, the transition ring 9 and the soft metal ferrule 8; during installation, an axial force is applied to the soft metal clamping sleeve 8 through the screwing nut 10, the soft metal clamping sleeve 8 deforms under the action of the axial force, and a gap between the conductor component 4 and the end plate pore passage 3 is filled, so that an airtight sealing effect is achieved.
The conductor assembly 4 comprises a protective sleeve 41, a glass-metal sealing assembly 42, an insulated covered wire 43, an inner insulated plug 44 and an outer insulated plug 45, and laser welding is adopted between the two ends of the protective sleeve 41 and the glass-metal sealing assembly 42 to ensure the sealing performance and the structural strength of the protective sleeve. The glass-metal sealing assembly 42 comprises a stainless steel shell 421, sealing glass 422 and oxygen-free copper pins 423; the stainless steel shell 421, the sealing glass 422 and the oxygen-free copper pins 423 are sequentially assembled in a sintering mold and sintered in a furnace to complete airtight insulation sealing; the oxygen-free copper pin 423 of the glass-to-metal sealing assembly 42 is connected to the insulated covered wire 43 through the inner insulating plug 44. The outer insulation plug 45 comprises a shell 454, an insulator 452, a clamp spring type jack 453, a fastening nut 455 and a cable cover 451, wherein the clamp spring type jack 453 is in plug-in connection with the oxygen-free copper pin 423 in the glass-metal sealing component 42; the insulator 452 is made of PEEK; the oxygen-free copper pins 423 of the glass-to-metal seal assembly 42 are connected to the terminal block by the outer insulating plugs 45. An external thread 424 is arranged on the stainless steel shell 421 of the glass-metal sealing assembly 42, and the fastening nut 455 on the outer insulating plug 45 is fastened and loosened with the external thread 424 through threaded connection.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (7)
1. A glass-to-metal sealed electrical penetration for a pressurized water reactor containment, comprising: the electrical penetration mainly comprises: the pressure monitoring device comprises a through cylinder, an end plate flange, a conductor assembly, a junction box, a terminal strip supporting rod and a pressure monitoring assembly; the end plate flanges are arranged at two ends of the penetrating cylinder body, and end plate pore passages for mounting the conductor assemblies are arranged on the end plate flanges; the junction box is located the outside of end plate flange, be equipped with binding post row in the junction box, binding post row is fixed in through the clamp on the terminal row bracing piece.
2. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 1, wherein: and a ferrule type mechanical sealing assembly is adopted between the end plate pore passage and the conductor assembly for airtight sealing.
3. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 2, wherein: the ferrule type mechanical seal assembly comprises: screwing the nut, the transition ring and the soft metal clamping sleeve; during installation, an axial force is applied to the soft metal clamping sleeve through the screwing nut, the soft metal clamping sleeve deforms under the action of the axial force, and a gap between the conductor assembly and the end plate pore passage is filled up, so that the effect of airtight sealing is achieved.
4. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 1, wherein: the conductor assembly comprises a protective sleeve, a glass-metal sealing assembly, an insulation coated lead, an inner insulation plug and an outer insulation plug, and the sealing performance and the structural strength of the protective sleeve are guaranteed by laser welding between the two ends of the protective sleeve and the glass-metal sealing assembly.
5. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 4, wherein: the glass-metal sealing component comprises a stainless steel shell, sealing glass and oxygen-free copper contact pins; the stainless steel shell, the sealing glass and the oxygen-free copper contact pin are sequentially assembled in a sintering mold and sintered in a furnace to complete airtight insulation sealing; and the oxygen-free copper contact pin of the glass-metal sealing component is connected with the insulating coated lead through the inner insulating plug.
6. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 5, wherein: the external insulation plug comprises a shell, an insulator, a clamp spring type jack, a fastening nut and a cable cover, wherein the clamp spring type jack is in plug-in connection with an oxygen-free copper contact pin in the glass-metal sealing assembly; the insulator is made of PEEK; and the oxygen-free copper contact pins of the glass-metal sealing assembly are connected with the wiring terminal strip through the external insulation plugs.
7. The glass-to-metal sealed electrical penetration for a pressurized water reactor containment vessel of claim 6, wherein: and an external thread is arranged on the stainless steel shell of the glass-metal sealing assembly, and a fastening nut on the external insulation plug is fastened and loosened with the external thread through threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616290.9A CN114388153A (en) | 2021-12-27 | 2021-12-27 | Glass-metal sealed electrical penetration assembly for pressurized water reactor containment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616290.9A CN114388153A (en) | 2021-12-27 | 2021-12-27 | Glass-metal sealed electrical penetration assembly for pressurized water reactor containment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114388153A true CN114388153A (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111616290.9A Pending CN114388153A (en) | 2021-12-27 | 2021-12-27 | Glass-metal sealed electrical penetration assembly for pressurized water reactor containment |
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| CN (1) | CN114388153A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115798747A (en) * | 2022-12-02 | 2023-03-14 | 中国核动力研究设计院 | Monomer dilatation middling pressure electric penetration piece suitable for heap |
-
2021
- 2021-12-27 CN CN202111616290.9A patent/CN114388153A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115798747A (en) * | 2022-12-02 | 2023-03-14 | 中国核动力研究设计院 | Monomer dilatation middling pressure electric penetration piece suitable for heap |
| CN115798747B (en) * | 2022-12-02 | 2024-04-23 | 中国核动力研究设计院 | Single-body capacity-expansion medium-voltage electric penetration piece suitable for small stacks |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220930 Address after: 710000 No. 15, west section of Xijin Road, Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Applicant after: XI'AN TAIJIN INDUSTRIAL ELECTROCHEMICAL TECHNOLOGY Co.,Ltd. Applicant after: SUZHOU NUCLEAR POWER RESEARCH INSTITUTE Co.,Ltd. Address before: 710000 No. 15, west section of Xijin Road, Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Applicant before: XI'AN SEAL ELECTRONIC MATERIAL TECHNOLOGY CO.,LTD. |
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| TA01 | Transfer of patent application right | ||
| CB02 | Change of applicant information |
Address after: 710000 No. 15, west section of Xijin Road, Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Applicant after: Xi'an Taijin Xinneng Technology Co.,Ltd. Applicant after: SUZHOU NUCLEAR POWER RESEARCH INSTITUTE Co.,Ltd. Address before: 710000 No. 15, west section of Xijin Road, Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Applicant before: XI'AN TAIJIN INDUSTRIAL ELECTROCHEMICAL TECHNOLOGY Co.,Ltd. Applicant before: SUZHOU NUCLEAR POWER RESEARCH INSTITUTE Co.,Ltd. |
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| CB02 | Change of applicant information |