CN215450916U - Internal pressure-bearing sealing structure of reactor core detector assembly - Google Patents
Internal pressure-bearing sealing structure of reactor core detector assembly Download PDFInfo
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- CN215450916U CN215450916U CN202121524996.8U CN202121524996U CN215450916U CN 215450916 U CN215450916 U CN 215450916U CN 202121524996 U CN202121524996 U CN 202121524996U CN 215450916 U CN215450916 U CN 215450916U
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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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Abstract
The utility model belongs to the technical field of high-temperature and high-pressure sealing equipment, and particularly relates to an internal pressure-bearing sealing structure of a reactor core detector assembly. The cable sealing device comprises a cable sealing element, a sealing penetrating element and an exhaust pipe; the cable sealing element is cylindrical, a semicircular elongated slot is designed on the outer side surface of the cable sealing element, a small hole penetrates through the center of the cylinder, a threaded hole is designed on the bottom surface of the cylinder, and the small hole is communicated with the threaded hole; the sealing penetrating piece is tubular, and a semicircular long groove is designed on the inner surface of the sealing penetrating piece; the exhaust pipe is tubular, and one end of the exhaust pipe is provided with threads; the exhaust pipe is inserted into the cable sealing element, the threaded end of the exhaust pipe is connected with the threaded hole in the bottom surface of the cable sealing element, the armored cable penetrates through the semicircular long groove of the sealing penetrating element, and the semicircular long groove of the cable sealing element is inserted into the semicircular long groove of the sealing penetrating element. The utility model ensures the secondary sealing when the shell of the part of the reactor core detector assembly extending into the reactor pressure vessel is broken.
Description
Technical Field
The utility model belongs to the technical field of high-temperature and high-pressure sealing equipment, and particularly relates to an internal pressure-bearing sealing structure of a reactor core detector assembly.
Background
In order to prevent the coolant from leaking out of the pressure vessel from the inside of the assembly when the outer casing of the portion of the core probe assembly extending into the inside of the reactor pressure vessel is broken, an inner sealing structure is designed inside the assembly, and the structure can bear the designed pressure and temperature (17.3MPa, 350 ℃) of the reactor coolant.
Disclosure of Invention
The utility model aims to provide an internal pressure-bearing sealing structure of a reactor core detector assembly, which ensures secondary sealing when a shell of the reactor core detector assembly extending into the internal part of a reactor pressure vessel is broken.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a pressure-bearing sealing structure in a reactor core detector assembly comprises a cable sealing element, a sealing penetrating element and an exhaust pipe; the cable sealing element is cylindrical, a semicircular elongated slot is designed on the outer side surface of the cable sealing element, a small hole penetrates through the center of the cylinder, a threaded hole is designed on the bottom surface of the cylinder, and the small hole is communicated with the threaded hole; the sealing penetrating piece is tubular, and a semicircular long groove is designed on the inner surface of the sealing penetrating piece; the exhaust pipe is tubular, and one end of the exhaust pipe is provided with threads; the exhaust pipe is inserted into the cable sealing element, the threaded end of the exhaust pipe is connected with the threaded hole in the bottom surface of the cable sealing element, the armored cable penetrates through the semicircular long groove of the sealing penetrating element, and the semicircular long groove of the cable sealing element is inserted into the semicircular long groove of the sealing penetrating element.
And brazing the contact positions of the cable sealing element, the sealing penetrating element and the armored cable.
The semi-circular long groove of the cable sealing element is inserted with the semi-circular long groove of the sealing penetrating element, and the positioning is carried out by utilizing the key groove.
The outer side surface of the cable sealing element is provided with 5-8 semicircular long grooves.
Chamfers are arranged at two ends of the semicircular long groove.
And opposite welding ports are reserved at two ends of the maximum outer diameter part of the outer part of the sealing penetrating piece.
The inner surface of the sealing penetrating piece is provided with 5-8 semicircular long grooves.
Chamfers are arranged at two ends of the semicircular long groove.
The armored cable is
The specification is stainless steel material or Inconel material.
The cable sealing element, the sealing penetrating element and the exhaust pipe are made of stainless steel materials.
The beneficial effects obtained by the utility model are as follows:
the utility model can keep the sealing function at least under the harsh environment of 400 ℃ and 27 MPa.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
in the figure: 1-cable seals; 2-sealing the penetration piece; 3-exhaust pipe.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1 and 2, the internal pressure-bearing sealing structure of the core detector assembly comprises a cable sealing member 1, a sealing penetration member 2 and an exhaust pipe 3.
The cable sealing element 1 is cylindrical, 5-8 semicircular long grooves are formed in the outer side face of the cable sealing element according to the arrangement quantity of the armored cables, and chamfers are arranged at two ends of each semicircular long groove so as to guide solder to flow. A small hole penetrates through the center of the cylinder, a threaded hole with a certain depth is designed in the bottom surface of the cylinder, the small hole is communicated with the threaded hole, and the two holes can facilitate the air tightness inspection of the components after brazing. The sealing penetrating piece 2 is tubular, opposite welding ports are reserved at two ends of the maximum outer diameter position of the outer portion, 5-8 semicircular long grooves are designed on the inner surface according to the arrangement quantity of the armored cables, and chamfers are arranged at two ends of each semicircular long groove so as to guide solder to flow. The exhaust pipe 3 is tubular, and one end of the exhaust pipe is provided with threads and is used for being fixed with a threaded hole in the bottom surface of the cable sealing element 1. The exhaust pipe 3 is inserted into the cable sealing element 1, the threaded end of the exhaust pipe 3 is connected with the threaded hole in the bottom surface of the cable sealing element 1, the armored cable penetrates through the semicircular long groove of the sealing penetrating element 2, the semicircular long groove of the cable sealing element 1 is inserted into the semicircular long groove of the sealing penetrating element 2 and is positioned by using the key groove, and the contact positions of the cable sealing element 1, the sealing penetrating element 2 and the armored cable are brazed.
The sealing structure may seal the armored cable. The armored cable is
The specification is matched with the semi-circular long grooves of the sealing penetrating piece 2 and the cable sealing piece 1.
The internal pressure-bearing sealing structure is connected and sealed in a mode of combining a cable sealing element, a sealing penetrating element, an exhaust pipe, an armored cable, a ring-shaped brazing filler metal and high-frequency brazing. The cable sealing element, the sealing penetrating element and the exhaust pipe are generally made of stainless steel materials, and the armored cable is generally made of stainless steel materials or inconel materials. The brazing melting point is generally 500-900 ℃, and the brazing melting point is selected according to different working conditions.
The armored cable, the cable sealing element, the sealing penetrating element and the exhaust pipe are required to be installed in a certain sequence. And carrying out nondestructive testing on the armored cable, the cable sealing element, the sealing penetration piece and the exhaust pipe before installation, and cleaning and drying the parts again after the nondestructive testing is passed. And connecting the cable sealing element with the exhaust pipe in a threaded manner. And penetrating the armored cable into the corresponding semicircular elongated slot of the sealing penetrating piece. And inserting the connected semicircular elongated slot of the cable sealing element into the armored cable and the sealing penetrating piece, and positioning by using the key slots of the cable sealing element and the sealing penetrating piece. After a plurality of circles of brazing filler metal are penetrated into the key slot side, the side can be brazed by adding protective measures. Similarly, the brazing of the other side is continued in the same manner. And cleaning and washing the brazed end face after the brazing is finished and cooled. Visual inspection of the brazed joint requires a smooth surface, no cracks, no pits, and other defects. Helium leak detection is carried out on the brazing welding seam through an exhaust pipe, and the leak rate needs to be less than 1 multiplied by 10-9Pa.m3And s. And carrying out a hydraulic test on the brazing welding line, wherein the pressure range is 20-30 MPa. The electrical performance of the armored cable is checked and is equivalent to that before welding. The reliability of the internal sealing structure can be proved through a series of tests.
Claims (10)
1. The utility model provides an inside pressure-bearing seal structure of reactor core detector subassembly which characterized in that: the cable sealing device comprises a cable sealing element, a sealing penetrating element and an exhaust pipe; the cable sealing element is cylindrical, a semicircular elongated slot is designed on the outer side surface of the cable sealing element, a small hole penetrates through the center of the cylinder, a threaded hole is designed on the bottom surface of the cylinder, and the small hole is communicated with the threaded hole; the sealing penetrating piece is tubular, and a semicircular long groove is designed on the inner surface of the sealing penetrating piece; the exhaust pipe is tubular, and one end of the exhaust pipe is provided with threads; the exhaust pipe is inserted into the cable sealing element, the threaded end of the exhaust pipe is connected with the threaded hole in the bottom surface of the cable sealing element, the armored cable penetrates through the semicircular long groove of the sealing penetrating element, and the semicircular long groove of the cable sealing element is inserted into the semicircular long groove of the sealing penetrating element.
2. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: and brazing the contact positions of the cable sealing element, the sealing penetrating element and the armored cable.
3. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: the semi-circular long groove of the cable sealing element is inserted with the semi-circular long groove of the sealing penetrating element, and the positioning is carried out by utilizing the key groove.
4. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: the outer side surface of the cable sealing element is provided with 5-8 semicircular long grooves.
5. The pressure-bearing sealing structure inside the core detector assembly of claim 4, wherein: chamfers are arranged at two ends of the semicircular long groove.
6. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: and opposite welding ports are reserved at two ends of the maximum outer diameter part of the outer part of the sealing penetrating piece.
7. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: the inner surface of the sealing penetrating piece is provided with 5-8 semicircular long grooves.
8. The pressure-bearing sealing structure inside the core probe assembly of claim 7, wherein: chamfers are arranged at two ends of the semicircular long groove.
9. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: the armored cable is
The specification is stainless steel material or Inconel material.
10. The pressure-bearing sealing structure inside the core probe assembly of claim 1, wherein: the cable sealing element, the sealing penetrating element and the exhaust pipe are made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524996.8U CN215450916U (en) | 2021-07-06 | 2021-07-06 | Internal pressure-bearing sealing structure of reactor core detector assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524996.8U CN215450916U (en) | 2021-07-06 | 2021-07-06 | Internal pressure-bearing sealing structure of reactor core detector assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215450916U true CN215450916U (en) | 2022-01-07 |
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ID=79715298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121524996.8U Active CN215450916U (en) | 2021-07-06 | 2021-07-06 | Internal pressure-bearing sealing structure of reactor core detector assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215450916U (en) |
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2021
- 2021-07-06 CN CN202121524996.8U patent/CN215450916U/en active Active
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