Chilling sleeve for expansion-fitting hollow cylinders
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-025/00
F25D-003/00
F17C-009/02
B23P-011/02
출원번호
US-0367242
(2003-02-13)
발명자
/ 주소
Gray, Luke George Mark
출원인 / 주소
Babcock & Wilcox Canada Ltd.
대리인 / 주소
Seymour Michael J.
인용정보
피인용 횟수 :
8인용 특허 :
9
초록▼
A chilling sleeve is provided for insertion into a hollow cylinder, such as a control rod driving mechanism guide tube, for adjusting the temperature and therefore the diameter of the cylinder. The chilling sleeve has external inlet and outlet ports, regulated by a pump. The pump injects high pressu
A chilling sleeve is provided for insertion into a hollow cylinder, such as a control rod driving mechanism guide tube, for adjusting the temperature and therefore the diameter of the cylinder. The chilling sleeve has external inlet and outlet ports, regulated by a pump. The pump injects high pressure liquid coolant, such as liquid nitrogen into the inlet port and through channels in the body of the sleeve out to a high pressure chamber. The liquid coolant escapes the high pressure chamber via escapes holes and enters a low pressure chamber, bordered by the outer wall of the hollow cylinder. In the lower pressure chamber, the liquid coolant evaporates, which chills the adjacent outer wall of the hollow cylinder, thereby shrinking the outer wall so that the hollow cylinder can be fitted into or removed from a cylindrical hole, for example a closure head hole in a vessel head of a nuclear reactor.
대표청구항▼
1. A portable chilling sleeve for controlling the temperature of a hollow cylinder having an outer wall and an inner surface, thereby adjusting the size of the diameter of the outer wall, comprising:an upper body having a sleeve leg insertable into said hollow cylinder, the upper body having inlet a
1. A portable chilling sleeve for controlling the temperature of a hollow cylinder having an outer wall and an inner surface, thereby adjusting the size of the diameter of the outer wall, comprising:an upper body having a sleeve leg insertable into said hollow cylinder, the upper body having inlet and outlet ports, wherein said body has a projection and a lower end cap, which in operation contact said outer walls of said hollow cylinder, the projection and lower end cap each having an o-ring seal for preventing leaks;a higher pressure chamber formed within the sleeve leg and in fluid communication with the inlet port;a lower pressure chamber, formed in operation between the sleeve leg and the inner surface of said hollow cylinder, the lower pressure chamber separated from said higher pressure chamber by escape holes in the sleeve leg and in fluid communication with the outlet port; andpump means for regulating intake into said inlet port and exhaust out of said outlet port, wherein said rate of exhaust release controls the temperature and size of the outer wall of said hollow cylinder. 2. A portable chilling sleeve according to claim 1, wherein said intake is a liquefied gas. 3. A portable chilling sleeve according to claim 2, wherein said intake is a cryogenic liquid. 4. A portable chilling sleeve according to claim 2, wherein said intake is high pressure liquid nitrogen and said exhaust is gaseous nitrogen. 5. A portable chilling sleeve according to claim 2, wherein said intake is liquefied carbon dioxide. 6. A portable chilling sleeve according to claim 1, wherein a handle is attached to a top portion of said sleeve body so that said sleeve can be lifted up and out of said hollow cylinder. 7. A portable chilling sleeve according to claim 1, wherein said pump means is remotely operated from said inlet and outlet ports. 8. A portable chilling sleeve for reversibly reducing the outside diameter of a control rod drive mechanism guide tube, the guide tube having an inner wall with an inner surface, comprising:an upper body having a sleeve leg insertable into said guide tube, said body having an inlet port in fluid communication with an inlet channel within said body, said inlet channel connected to a higher pressure chamber surrounded by said sleeve leg;a lower pressure chamber located in operation between said sleeve leg and the inner surface of said guide tube, the lower pressure chamber separated from said higher pressure chamber by escape holes and in fluid communication with an outlet port in said upper body; andpump means for regulating intake into said inlet port and exhaust out of said outlet port, wherein said rate of exhaust release controls the size of the outside diameter of said guide tube. 9. A portable chilling sleeve according to claim 8, wherein said sleeve leg has a projection and a lower end cap, which in operation contact said outer walls of sold guide tube, the projection and lower end cap each having an o-ring seal for preventing leaks. 10. A portable chilling sleeve according to claim 8, wherein said intake is a liquefied gas. 11. A portable chilling sleeve according to claim 10, wherein said intake is a cryogenic liquid. 12. A portable chilling sleeve according to claim 10, wherein said intake is high pressure liquid nitrogen and said exhaust is gaseous nitrogen. 13. A portable chilling sleeve according to claim 10, wherein said intake is liquefied carbon dioxide. 14. A portable chilling sleeve according to claim 8, wherein a handle is attached to a top portion of said sleeve body so that said sleeve can be lifted up and out of said hollow cylinder. 15. A portable chilling sleeve according to claim 8, wherein said pump means is remotely operated from said inlet and outlet ports. 16. A method of inserting a control rod drive mechanism guide tube through a hole in the closure head of a reactor pressure vessel, the hole having a hole diameter and the guide tube having an outer wall with an inner surface and an outer diameter greater than the hole diameter, comprising:providing a chilling sleeve with an upper body having a sleeve leg insertable into the guide tube, the body having an outlet port, an inlet port in fluid communication with a higher pressure chamber within the sleeve leg, the sleeve leg having a projection surrounded by a first o-ring seal, an end cap surrounded by a second o-ring seal, and escape holes located between the first and second o-ring seals adjacent the end cap;inserting the chilling sleeve into the guide tube to form a lower pressure chamber between the sleeve leg and the inner surface of the guide tube, the lower pressure chamber in fluid communication with the higher pressure chamber via the escape holes and in fluid communication with the outlet port;introducing a liquefied gas into the higher pressure chamber via said inlet port and directing the liquefied gas into the lower pressure chamber via the sleeve leg escape holes;evaporating the liquefied gas in the lower pressure chamber to form a gaseous fluid thereby cooling the inner surface of the guide tube and reducing the outer diameter of the guide tube to a size less than the hole diameter;discharging the gaseous fluid from the lower chamber via the outlet port; andinserting the guide tube into the hole in the closure head. 17. The method of claim 16, further comprising stopping the introduction of liquefied gas, thereby increasing the outer diameter of the guide tube. 18. The method of claim 16, further comprising repressurizing the discharged gaseous fluid to form a liquefied gas and recycling the repressurized liquefied gas back to the inlet port.
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이 특허에 인용된 특허 (9)
Krips Herbert (Bochum-Langendreer DT), Device and method for expansion-swaging tubes into the bores of a tube plate.
Fournier Yves (Chatenay Le Royal FRX), Device for fixing in a fluid tight manner a through tube in a dome-shaped wall of a component of a nuclear reactor.
Archer Jacques (Chatenay-Malabry FRX) Moreau Georges (Viriat FRX) Besson Daniel (Lyons FRX) Giraud Benoit (Lyons FRX), Method of replacing a tube on a straight-tube heat exchanger.
Fournier Yves (Chatenay Le Royal FRX), Process and device for fixing in a fluidtight manner a through tube in a dome-shaped wall of a component of a nuclear re.
Shargots, Scott J.; Ales, Mathew W.; Edwards, Michael J.; Paliga, Randall J., Pressurized water reactor with reactor coolant pumps operating in the downcomer annulus.
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