CN200999954Y - Negative-pressure automatic drainage device - Google Patents
Negative-pressure automatic drainage device Download PDFInfo
- Publication number
- CN200999954Y CN200999954Y CNU2007201234416U CN200720123441U CN200999954Y CN 200999954 Y CN200999954 Y CN 200999954Y CN U2007201234416 U CNU2007201234416 U CN U2007201234416U CN 200720123441 U CN200720123441 U CN 200720123441U CN 200999954 Y CN200999954 Y CN 200999954Y
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- valve
- negative
- negative pressure
- pressure
- control valve
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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.)
- Expired - Lifetime
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Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2007201234416U CN200999954Y (en) | 2007-01-29 | 2007-01-29 | Negative-pressure automatic drainage device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2007201234416U CN200999954Y (en) | 2007-01-29 | 2007-01-29 | Negative-pressure automatic drainage device |
Publications (1)
Publication Number | Publication Date |
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CN200999954Y true CN200999954Y (en) | 2008-01-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNU2007201234416U Expired - Lifetime CN200999954Y (en) | 2007-01-29 | 2007-01-29 | Negative-pressure automatic drainage device |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101994907A (en) * | 2009-08-19 | 2011-03-30 | 淮南矿业(集团)有限责任公司 | Drainage system and method for gas pipeline |
CN102537649A (en) * | 2012-01-11 | 2012-07-04 | 河南理工大学 | Automatic water discharge device free from pressure difference |
CN102767393A (en) * | 2012-07-16 | 2012-11-07 | 中国矿业大学 | Negative pressure automatic water discharge device |
CN104747898A (en) * | 2015-03-09 | 2015-07-01 | 胡玮琳 | Positive and negative pressure universal automatic water releasing device |
CN105464697A (en) * | 2016-01-04 | 2016-04-06 | 淮北矿业股份有限公司 | Self-made automatic water discharge device |
-
2007
- 2007-01-29 CN CNU2007201234416U patent/CN200999954Y/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101994907A (en) * | 2009-08-19 | 2011-03-30 | 淮南矿业(集团)有限责任公司 | Drainage system and method for gas pipeline |
CN101994907B (en) * | 2009-08-19 | 2013-03-20 | 淮南矿业(集团)有限责任公司 | Drainage system and method for gas pipeline |
CN102537649A (en) * | 2012-01-11 | 2012-07-04 | 河南理工大学 | Automatic water discharge device free from pressure difference |
CN102537649B (en) * | 2012-01-11 | 2014-10-15 | 河南理工大学 | Automatic water discharge device free from pressure difference |
CN102767393A (en) * | 2012-07-16 | 2012-11-07 | 中国矿业大学 | Negative pressure automatic water discharge device |
CN102767393B (en) * | 2012-07-16 | 2014-10-29 | 中国矿业大学 | Negative pressure automatic water discharge device |
CN104747898A (en) * | 2015-03-09 | 2015-07-01 | 胡玮琳 | Positive and negative pressure universal automatic water releasing device |
CN104747898B (en) * | 2015-03-09 | 2018-07-17 | 胡玮琳 | A kind of general automatic water drainage device of positive and negative pressure |
CN105464697A (en) * | 2016-01-04 | 2016-04-06 | 淮北矿业股份有限公司 | Self-made automatic water discharge device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: CHINA COAL TECHNOLOGY ENGINEERING GROUP CHONGQING Free format text: FORMER NAME: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RESEARCH INSTITUTE Owner name: COAL SCIENTIFIC RESEARCH INSTITUTE CHONGQING INSTI Free format text: FORMER NAME: CHONGQING BRANCH, COAL SCIENCE RESEARCH GENERAL INST. Owner name: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RE Free format text: FORMER NAME: COAL SCIENTIFIC RESEARCH INSTITUTE CHONGQING INSTITUTE |
|
CP01 | Change in the name or title of a patent holder |
Address after: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee after: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee before: Chongqing Institute of Coal Science Research Institute Address after: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee after: Chongqing Institute of Coal Science Research Institute Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee before: Chongqing Branch of China Coal Research Institute |
|
CP03 | Change of name, title or address |
Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Patentee after: CHONGQING RESEARCH INSTITUTE CO., LTD. OF CHINA COAL TECHNOLOGY & ENGINEERING Group Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee before: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. |
|
CX01 | Expiry of patent term |
Granted publication date: 20080102 |