Safety device for pressure vessels, particularly of the type associated with nuclear reactors
阅读：856发布：2022-07-11
专利汇可以提供Safety device for pressure vessels, particularly of the type associated with nuclear reactors专利检索，专利查询，专利分析的服务。并且As a safety measure relating to pressure vessels of nuclear reactors, there is provided a safety tank surrounding the pressure vessel at least in its upper range and a guard ring overlapping the upper edge of the safety tank. The guard ring is disconnectably secured by means of bolts extending within the safety tank to a carrier ring situated under the nipples of the pressure vessel.，下面是Safety device for pressure vessels, particularly of the type associated with nuclear reactors专利的具体信息内容。
1. In a safety device for a pressure vessel, the latter including circumferentially arranged inlet and outlet nipples and a removable cover secured to the pressure vessel by cover bolts arranged along a circle, the improvement comprising A. a safety tank spacedly surrounding at least an upper terminal portion of said pressure vessel including the range of said nipples, said safety tank being normally isolated from the pressure prevailing in said pressure vessel, said safety tank having an upper edge, B. a guard ring essentially overlapping said upper edge of said safety tank and said cover bolts, C. a support means surrounding said pressure vessel below said nipples and C. tightening members disconnectably fastening said guard ring to said support means, said tightening members being arranged along a circle and extending within said safety tank.
2. An improvement as defined in claim 1, wherein the cross section of said guard ring is such that more than one half of its bending resistance is within the circle along which said tightening means are disposed.
3. An improvement as defined in claim 1, wherein the upper portion of said safety tank is formed of a cylindrical casing loosely sitting on a mid portion of said safety tank and being directly affixed to said guard ring.
4. An improvement as defined in claim 1, wherein said tightening members associated with said guard ring are outwardly divergent.
5. An improvement as defined in claim 4, wherein said tightening members are formed as tension bolts.
6. An improvement as defined in claim 1, including a guard cover situated above said removable cover within the circle along which said cover bolts are arranged, said guard cover including an outer marginal range overlapped by said guard ring.
7. An improvement as defined in claim 6, wherein said guard ring and said guard cover constitute a jointly removable unit.
8. An improvement as defined in claim 1, wherein said support means is formed as a carrier ring.
9. An improvement as defined in claim 8, including a concrete cylinder surrounding said pressure vessel and formed as a concrete pressure container, said carrier ring being embedded in said concrete cylinder.
10. An improvement as defined in claim 1, including a concrete cylinder surrounding said pressure vessel and formed as a concrete pressure container, said tightening means being directly anchored in said concrete cylinder.
11. An improvement as defined in claim 1, including a safety tank portion surrounding said pressure vessel below said nipples and below said support means.
12. An improvement as defined in claim 11, wherein said safety tank portion is in a face-to-face engagement with said pressure vessel.
13. An improvement as defined in claim 11, wherein said safety tank portion spacedly surrounds said pressure vessel, said improvement includes a steel rib structure at least partially filling the space between said safety tank portion and said pressure vessel below said support means.
14. An improvement as defined in claim 1, wherein said support means is formed as a carrier ring constituting one part of said safety tank.
15. An improvement as defined in claim 11, wherein said support means is formed as a carrier ring constituting one part of said safety tank portion.
16. An improvement as defined in claim 1, including removable protective filler members disposed in the range of said tightening members between said safety tank and said pressure vessel on the one hand and said guard ring and said support means on the other hand.
17. An improvement as defined in claim 6, including a safety tank portion surrounding said pressure vessel below said nipples and below said support means; said safety tank, said safety tank portion, said guard ring and said guard cover are provided with external insulating means.
18. An improvement as defined in claim 6, including an overflow clearance provided between said vessel cover and said guard cover.
19. An improvement as defined in claim 1, including A. a concrete cylinder surrounding said pressure vessel, B. a safety tank portion surrounding said pressure vessel below said nipples and below said support means and C. a pressure-resistant oblique conduit passing through said concrete cylinder and said safety tank portion and merging into the space below said pressure vessel.
20. An improvement as defined in claim 1, including additional support means engaging lower outer portions of said pressure vessel.
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