CN203931520U - A kind of nuclear reactor pressure container O-ring seal producing device - Google Patents
A kind of nuclear reactor pressure container O-ring seal producing device Download PDFInfo
- Publication number
- CN203931520U CN203931520U CN201420095959.3U CN201420095959U CN203931520U CN 203931520 U CN203931520 U CN 203931520U CN 201420095959 U CN201420095959 U CN 201420095959U CN 203931520 U CN203931520 U CN 203931520U
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- China
- Prior art keywords
- analogue body
- packing ring
- reactor pressure
- nickel
- ring
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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.)
- Withdrawn - After Issue
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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)
Abstract
The utility model belongs to nuclear power plant reactor service technique field, is specifically related to a kind of shortening overhaul duration, reduces the nuclear reactor pressure container O-ring seal producing device of nuclear radiation dosage; Comprise analogue body (1), 6 square tubes (2), 4 hangers (3) and center stationary installation (4), wherein analogue body (1) is circle pipe dress, the inner ring of one end of 6 square tubes (2) and analogue body (1) is fixed, the other end is fixed in the center stationary installation (4) of being located at the analogue body center of circle, is uniform-distribution with 4 hangers (3) on the inner ring of analogue body (1); 1. the nickel packing ring that simultaneously adopts new equipment to make can greatly reduce overhaul critical path time and power station collective radiation dosage; The nickel packing ring that adopts new equipment to make can be saved critical path time 14 hours; Cost-saving annual more than 1,000 ten thousand yuan, reduce personnel's collective radiation dosage 3manmSv.
Description
Technical field
The invention belongs to nuclear power plant reactor service technique field, be specifically related to a kind of nuclear reactor pressure container O-ring seal producing device and method for making.
Background technology
Nuclear power plant reactor pressure vessel adopts bimetallic (spring cone) seal circle hermetically-sealed construction, lower flange end face has 2 concentric " V " type seal grooves, for laying the φ 5mm O-ring seal of being made by metallic nickel hereinafter to be referred as " nickel packing ring ", realize the sealing between pressure vessel and top cover by 54 kingbolts and nickel packing ring.
Each reactor pressure vessel solution sealing all needs to change nickel packing ring later, nickel packing ring requires very high with coordinating of V-type groove, total backlash≤1.7mm in same position nickel packing ring and V-type groove between lateral wall, girth deviation is less than 1mm, and the altitude range that nickel packing ring exceeds V-type groove is 1.7 ± 0.2mm.In view of above-mentioned strict demand, the making of nickel packing ring must be carried out at reactor pressure vessel sealing surface, and the nickel wire docking that reaches 12 meters is welded into the nickel packing ring measure-alike with V-type groove.
Summary of the invention
Technical matters to be solved by this invention is for prior art deficiency, to provide a kind of and shorten the overhaul duration, nuclear reactor pressure container O-ring seal producing device and the method for making of minimizing nuclear radiation dosage.
The technical solution adopted in the present invention is:
A kind of nuclear reactor pressure container O-ring seal producing device, comprise analogue body, 6 square tubes, 4 hangers and center stationary installation, wherein analogue body is circle pipe dress, one end of 6 square tubes and the inner ring of analogue body are fixed, the other end is fixed in the center stationary installation of being located at the analogue body center of circle, is uniform-distribution with 4 hangers on the inner ring of analogue body.
Described analogue body 1 comprises and is solidly connected bolt, V-shaped groove, flange section and base for supporting, and wherein base for supporting has 4 blocks of plates " mouth " font to be spliced, and flange section is fixed on base for supporting upper end by coupling bolt, and flange section upper surface is provided with two V-shaped grooves.
A kind of nuclear reactor pressure container O-ring seal method for making, comprises the following steps:
Step 1, is installed to nickel packing ring blank in V-type groove, in the whole length of nickel wire, every 1.0 meters of its diameters of measurement, guarantees that diameter is 5.0
-0.2within the scope of mm, with nonmetal hammer, it is corrected, is hit tight, use lead to compress nickel packing ring, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and analogue body V-type groove both sides, the height of the outstanding primary sealing area of nickel packing ring is within the scope of 1.7 ± 0.2mm;
Step 2 is cut nickel packing ring joint redundance on flange analogue body, and redundance nickel wire connects use as simulating piece test weld, will consider to expand with heat and contract with cold to nickel packing ring Accuracy simultaneously, and nickel packing ring elongation is according to following formula calculative determination:
ΔL＝C
O·ΔT·α
Wherein Δ L is the elongation of nickel packing ring under temperature difference T; Δ T is the temperature difference of reactor pressure vessel V-type groove and flange analogue body; α is the thermal linear expansion coefficient of metallic nickel; CO is pressure vessel V-type groove perimeter value.
Step 3, bevel for welding is prepared, according to root face 2
-0.5mm, 27 ° 30 ' ± 3 ° of groove angles, group is to gap 0-1mm, bevel for welding nonconcentricity≤0.1mm bevel for welding;
Step 4, filing weld seam, after butt welded seam polishing, has not allowed annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out the grade estimation of liquid penetrant inspection and welding;
Step 5, welding and the inspection of formal part, weld filing weld seam to nickel packing ring.After butt welded seam polishing, do not allow annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out liquid penetrant inspection and welding quality evaluation;
Step 6, the nickel packing ring of making is put in the V-type groove of the main faying face of pressure vessel, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and reactor pressure vessel V-type groove both sides, the height of the outstanding primary sealing area of nickel packing ring, within the scope of 1.7 ± 0.2mm, carries out the 30 minutes 2MPa gas pressure tests of sealing after reactor sealing; The hydraulic testing of 17.6Mpa has been carried out in a whole loop.
The invention has the beneficial effects as follows:
1. the nickel packing ring that simultaneously adopts new equipment to make can greatly reduce overhaul critical path time and power station collective radiation dosage;
2. the nickel packing ring that adopts new equipment to make can be saved critical path time 14 hours;
3. cost-saving annual more than 1,000 ten thousand yuan, reduce personnel's collective radiation dosage 3manmSv.
Brief description of the drawings
Fig. 1 is nuclear reactor pressure container O-ring seal producing device schematic diagram;
Fig. 2 is nuclear reactor pressure container O-ring seal producing device sectional view;
In figure: 1. simulation topic, 2. square tube, 3. hanger, 4. center stationary installation, be 5. fixedly connected with bolt, 6.V shape groove, 7. flange section, 8. base for supporting.
Embodiment
Below in conjunction with drawings and Examples, one provided by the invention is introduced:
A kind of nuclear reactor pressure container O-ring seal producing device, comprise 2,4 hangers 3 of 1,6 square tubes of analogue body and center stationary installation 4, wherein analogue body 1 is circle pipe dress, the inner ring of one end of 6 square tubes 2 and analogue body 1 is fixed, the other end is fixed in the center stationary installation 4 of being located at the analogue body center of circle, is uniform-distribution with 4 hangers 3 on the inner ring of analogue body 1.
Described analogue body 1 comprises and is solidly connected bolt 5, V-shaped groove 6, flange section 7 and base for supporting 8, wherein base for supporting 8 has 4 blocks of plates " mouth " font to be spliced, flange section 7 is fixed on base for supporting 8 upper ends by coupling bolt 5, and flange section 7 upper surfaces are provided with two V-shaped grooves 6.
A kind of nuclear reactor pressure container O-ring seal method for making, comprises the following steps:
Step 1, is installed to nickel packing ring blank in V-type groove, in the whole length of nickel wire, every 1.0 meters of its diameters of measurement, guarantees that diameter is 5.0
-0.2within the scope of mm, with nonmetal hammer, it is corrected, is hit tight, use lead to compress nickel packing ring, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and analogue body V-type groove both sides, the height of the outstanding primary sealing area of nickel packing ring is within the scope of 1.7 ± 0.2mm;
Step 2 is cut nickel packing ring joint redundance on flange analogue body, and redundance nickel wire connects use as simulating piece test weld, will consider to expand with heat and contract with cold to nickel packing ring Accuracy simultaneously, and nickel packing ring elongation is according to following formula calculative determination:
ΔL＝C
O·ΔT·α
Wherein Δ L is the elongation of nickel packing ring under temperature difference T; Δ T is the temperature difference of reactor pressure vessel V-type groove and flange analogue body; α is the thermal linear expansion coefficient of metallic nickel; CO is pressure vessel V-type groove perimeter value.
Step 3, bevel for welding is prepared, according to root face 2
-0.5mm, 27 ° 30 ' ± 3 ° of groove angles, group is to gap 0-1mm, bevel for welding nonconcentricity≤0.1mm bevel for welding;
Step 4, filing weld seam, after butt welded seam polishing, has not allowed annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out the grade estimation of liquid penetrant inspection and welding;
Step 5, welding and the inspection of formal part, weld filing weld seam to nickel packing ring.After butt welded seam polishing, do not allow annular cut, weld diameter 5
-0.2within the scope of mm, butt welded seam carries out liquid penetrant inspection and welding quality evaluation;
Step 6, the nickel packing ring of making is put in the V-type groove of the main faying face of pressure vessel, the total backlash δ 1+ δ 2≤1.7mm of same position nickel packing ring and reactor pressure vessel V-type groove both sides, the height of the outstanding primary sealing area of nickel packing ring, within the scope of 1.7 ± 0.2mm, carries out the 30 minutes 2MPa gas pressure tests of sealing after reactor sealing; The hydraulic testing of 17.6Mpa has been carried out in a whole loop.
Nuclear power station overhaul window, uses laser tracker accurately to measure the physical size of reactor pressure vessel primary sealing area seal groove, and measurement result is accurate to millimeter.
Flange analogue body V-type groove and the main faying face V-type of reactor pressure vessel groove girth deviation are less than 1mm, V-type rooved face roughness Ra is less than 1.6, the steel ball that is 5 ± 0.005mm by diameter is put into flange analogue body V-type groove, the altitude range that steel ball exceeds V-type groove is 1.7 ± 0.2mm, and the inner surface of V-type groove does not allow to occur the defects such as burr, cut, pit.Flange analogue body material is stainless steel, and long-term use can not deform, and whole flange analogue body is one-piece construction, flange analogue body supports energy long-term safety pivot flange analogue body reliably, do not deform and corrosion, on flange analogue body, arrange hanger, convenient lifting.
Flange analogue body processing and fabricating requires: the reactor pressure vessel seal groove physical size recording according to laser tracker is carried out the processing and manufacturing work of nickel packing ring making analogue body flange.After making work completes, reuse laser measuring apparatus the seal groove physical size of flange analogue body is carried out to confirmatory measurement.The seal groove of tackling if desired flange analogue body re-starts processing and measures.
Claims (2)
1. a nuclear reactor pressure container O-ring seal producing device, it is characterized in that: comprise analogue body (1), 6 square tubes (2), 4 hangers (3) and center stationary installation (4), wherein analogue body (1) is circle pipe dress, the inner ring of one end of 6 square tubes (2) and analogue body (1) is fixed, the other end is fixed in the center stationary installation (4) of being located at the analogue body center of circle, is uniform-distribution with 4 hangers (3) on the inner ring of analogue body (1).
2. a kind of nuclear reactor pressure container O-ring seal producing device according to claim 1, it is characterized in that: described analogue body (1) comprises and is solidly connected bolt (5), V-shaped groove (6), flange section (7) and base for supporting (8), wherein base for supporting (8) has 4 blocks of plates " mouth " font to be spliced, flange section (7) is fixed on base for supporting (8) upper end by coupling bolt (5), and flange section (7) upper surface is provided with two V-shaped grooves (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095959.3U CN203931520U (en) | 2014-03-04 | 2014-03-04 | A kind of nuclear reactor pressure container O-ring seal producing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095959.3U CN203931520U (en) | 2014-03-04 | 2014-03-04 | A kind of nuclear reactor pressure container O-ring seal producing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203931520U true CN203931520U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420095959.3U Withdrawn - After Issue CN203931520U (en) | 2014-03-04 | 2014-03-04 | A kind of nuclear reactor pressure container O-ring seal producing device |
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| CN (1) | CN203931520U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900281A (en) * | 2014-03-04 | 2015-09-09 | 江苏核电有限公司 | Nuclear reactor pressure vessel sealing ring production apparatus and nuclear reactor pressure vessel sealing ring production method |
| CN114193086A (en) * | 2021-11-12 | 2022-03-18 | 江苏核电有限公司 | Off-line manufacturing method for nickel gasket of main sealing surface of reactor pressure vessel |
-
2014
- 2014-03-04 CN CN201420095959.3U patent/CN203931520U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900281A (en) * | 2014-03-04 | 2015-09-09 | 江苏核电有限公司 | Nuclear reactor pressure vessel sealing ring production apparatus and nuclear reactor pressure vessel sealing ring production method |
| CN104900281B (en) * | 2014-03-04 | 2018-07-06 | 江苏核电有限公司 | A kind of nuclear reactor pressure container sealing ring producing device and production method |
| CN114193086A (en) * | 2021-11-12 | 2022-03-18 | 江苏核电有限公司 | Off-line manufacturing method for nickel gasket of main sealing surface of reactor pressure vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20180706 |