JPS54132874A - Valve strainer manufacturing method - Google Patents
Valve strainer manufacturing methodInfo
- Publication number
- JPS54132874A JPS54132874A JP3921678A JP3921678A JPS54132874A JP S54132874 A JPS54132874 A JP S54132874A JP 3921678 A JP3921678 A JP 3921678A JP 3921678 A JP3921678 A JP 3921678A JP S54132874 A JPS54132874 A JP S54132874A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- strainer
- reduced
- coarse holes
- steel plates
- 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.)
- Granted
Links
Abstract
PURPOSE: To reduce a pressure drop, prevent main valve vibration, and reduce processes compared with the conventonal method of processing, by shaping tapered elliptical coarse holes, diminishing inside, on the strainer proper.
CONSTITUTION: Flat steel plate 3' is used to make steam strainer proper 3 as used in thermal and nuclear steam turbine main valves. Two steel plates are placed one on top of the other, and coarse holes C are bored on them. Each plate is shaped into a cylinder by roll bending and welded. Then, coarse holes become elliptical tapers diminishing inside. This shape allows steam to flow in naturally. Consequantly, a strainer is obtained in which resistance to steam flow is reduced, and pressure loss is also reduced. Further, since boring is performed on flat steel plates, working hours are remarkably reduced as well as the number of processes.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3921678A JPS54132874A (en) | 1978-04-05 | 1978-04-05 | Valve strainer manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3921678A JPS54132874A (en) | 1978-04-05 | 1978-04-05 | Valve strainer manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54132874A true JPS54132874A (en) | 1979-10-16 |
JPS5642969B2 JPS5642969B2 (en) | 1981-10-08 |
Family
ID=12546933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3921678A Granted JPS54132874A (en) | 1978-04-05 | 1978-04-05 | Valve strainer manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54132874A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114719077A (en) * | 2022-04-09 | 2022-07-08 | 浙江亿斯特阀门有限公司 | Light-weight pneumatic cut-off valve |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4312540Y1 (en) * | 1965-06-18 | 1968-05-29 | ||
JPS51113503U (en) * | 1975-03-10 | 1976-09-14 |
-
1978
- 1978-04-05 JP JP3921678A patent/JPS54132874A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4312540Y1 (en) * | 1965-06-18 | 1968-05-29 | ||
JPS51113503U (en) * | 1975-03-10 | 1976-09-14 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114719077A (en) * | 2022-04-09 | 2022-07-08 | 浙江亿斯特阀门有限公司 | Light-weight pneumatic cut-off valve |
CN114719077B (en) * | 2022-04-09 | 2023-08-22 | 浙江亿斯特阀门有限公司 | Lightweight pneumatic cut-off valve |
Also Published As
Publication number | Publication date |
---|---|
JPS5642969B2 (en) | 1981-10-08 |
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