JPS551216A - Icebreaker - Google Patents
IcebreakerInfo
- Publication number
- JPS551216A JPS551216A JP7285978A JP7285978A JPS551216A JP S551216 A JPS551216 A JP S551216A JP 7285978 A JP7285978 A JP 7285978A JP 7285978 A JP7285978 A JP 7285978A JP S551216 A JPS551216 A JP S551216A
- Authority
- JP
- Japan
- Prior art keywords
- ice
- bow
- refrigerant
- icebreaker
- injector
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Circuit Breakers (AREA)
Abstract
PURPOSE: To produce longer cracks in ice through shocks given by an icebreaker's bow and effectively break ice, by projecting a support frame in front of the bow and discharging refrigerant from its tip to the ice plate right before breaking for generating thermal stress in the ice.
CONSTITUTION: A refrigerant injector 6, movable vertically and back and forth by means of a hydraulic cylinder 12, is extended from the icebreaker's bow through a support arm 7. Refrigerant 10 such as liquid nitrogen in a storage tank 9 is discharged from the injector 6 through a pump 11 and pipe 8. The ice plate 2 injected with the refrigerant 10 generates local tensile thermal stress due to cooling, which produces much longer cracks than those caused by conventional icebreaking methods when the bow of icebreaker 3 strikes against the ice, thus the icebreaking is very effective.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7285978A JPS551216A (en) | 1978-06-16 | 1978-06-16 | Icebreaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7285978A JPS551216A (en) | 1978-06-16 | 1978-06-16 | Icebreaker |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS551216A true JPS551216A (en) | 1980-01-08 |
Family
ID=13501490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7285978A Pending JPS551216A (en) | 1978-06-16 | 1978-06-16 | Icebreaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS551216A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103708005A (en) * | 2013-12-16 | 2014-04-09 | 浙江海洋学院 | Icebreaker |
-
1978
- 1978-06-16 JP JP7285978A patent/JPS551216A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103708005A (en) * | 2013-12-16 | 2014-04-09 | 浙江海洋学院 | Icebreaker |
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