CN108006280B - Emergency oil drain valve - Google Patents
Emergency oil drain valve Download PDFInfo
- Publication number
- CN108006280B CN108006280B CN201711481494.XA CN201711481494A CN108006280B CN 108006280 B CN108006280 B CN 108006280B CN 201711481494 A CN201711481494 A CN 201711481494A CN 108006280 B CN108006280 B CN 108006280B
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- China
- Prior art keywords
- valve
- oil
- valve body
- valve rod
- safety
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses an emergency oil drain valve, which belongs to the field of steam turbine equipment and is characterized in that one end of a valve body is provided with a valve cover, a valve rod penetrates through the valve cover, the valve rod is fixedly connected with a valve head arranged in the valve body, and the part of the valve rod, which is positioned in the valve body, is sleeved with an elastic part; the outer surface of the valve body is provided with an oil drainage hole, and the valve head completely seals the oil drainage hole; a safety oil chamber is arranged at the bottom of the valve body, and a safety oil hole is formed in the bottom of the safety oil chamber; the top of the valve rod is provided with a hand wheel. The invention has the characteristics of simple structure, and rapid relief of safety oil pressure at emergency time, so that the main steam valve and the steam extraction valve are closed more rapidly, and the turbine is not damaged due to overhigh overspeed.
Description
Technical Field
The invention relates to an emergency oil drain valve, and belongs to the field of steam turbine equipment.
Background
The safety oil circuit of steam turbine is the oil circuit for ensuring safety. Normally, the automatic closer is supported to be opened in normal operation, and when protection is performed, the safety oil cuts off steam inlet of the steam turbine through pressure relief so as to protect the steam turbine from fault expansion.
Disclosure of Invention
The invention aims to provide an emergency oil drain valve which can drain oil quickly at an emergency moment so as to quickly drain safety oil pressure, so that a main throttle valve and an extraction valve can be closed more quickly, and the damage caused by overhigh overspeed of a steam turbine can be avoided.
In order to solve the problems, the invention provides an emergency oil drain valve which is characterized in that one end of a valve body is provided with a valve cover, a valve rod penetrates through the valve cover, the valve rod is fixedly connected with a valve head arranged in the valve body, and the part of the valve rod, which is positioned in the valve body, is sleeved with an elastic part; the outer surface of the valve body is provided with an oil drainage hole, and the valve head completely seals the oil drainage hole; a safety oil chamber is arranged at the bottom of the valve body, and a safety oil hole is formed in the bottom of the safety oil chamber; the top of the valve rod is provided with a hand wheel.
Preferably, a baffle plate is arranged between the valve rod and the valve head, and the valve rod, the valve head and the baffle plate are fixedly connected through bolts from top to bottom. The valve rod, the valve head and the baffle plate can move up and down simultaneously.
Preferably, the elastic member is a spring. The valve rod and the valve head move down rapidly by elasticity to open the oil drain.
Preferably, two ends of the spring are fixed between the baffle plate and the valve cover.
Preferably, the valve stem is connected with the handwheel through a handwheel nut. The valve rod and the valve head are convenient to lift when the safety oil pressure is recovered.
Preferably, a sealing plate is arranged on one side of the valve head and can seal the oil drainage hole. The sealing plate can slide up and down along with the valve head to seal the oil drainage hole.
The invention has the beneficial effects that:
the invention can lead the valve rod and the valve head to move downwards rapidly under the action of the upper spring force when the security oil is reduced to a certain degree, open the oil drainage and more rapidly drain the security oil pressure at an emergency moment, thus leading the main steam valve and the steam extraction valve to be closed more rapidly and avoiding the damage of the turbine caused by overhigh overspeed. Meanwhile, when the safety oil pressure is recovered, the safety oil pressure can be established only by pulling the upper hand wheel to close oil drainage, so that accidents caused by opening of a main valve and an extraction valve due to the fact that the safety oil pressure is raised by misoperation are prevented.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. a hand wheel; 2. a valve stem; 3. a valve head; 4. a security oil chamber; 5. a sealing plate; 6. an oil drainage hole; 7. a spring; 8. a safety oil hole; 9. a baffle plate; 10. a valve body; 11. a hand wheel nut; 12. and a valve cover.
Detailed Description
Example 1:
referring to the attached drawings of the specification, the invention provides a critical oil drain valve which is characterized in that one end of a valve body 10 is provided with a valve cover 12, a valve rod 2 penetrates through the valve cover 12, the valve rod 2 is connected with a baffle plate 9 arranged inside the valve body 10, the baffle plate 9 is connected with a valve head 3, and the valve rod 2, the baffle plate 9 and the valve head 3 are fixedly connected through bolts from top to bottom. The valve rod 2 is sleeved with a spring 7, and two ends of the spring 7 are fixed between the baffle 9 and the valve cover 12. An oil drainage hole 6 is formed in the outer surface of the valve body 10, a sealing plate 5 is arranged on one side of the valve head 3, and the sealing plate 5 can completely seal the oil drainage hole 6; the bottom of the valve body 10 is provided with a security oil chamber 4, the bottom of the security oil chamber 4 is provided with a security oil hole 8, the security oil hole 8 is used for inflow and outflow of security oil, the top of the valve rod 2 is provided with a hand wheel 1, and the valve rod 2 and the hand wheel 1 are fixedly connected through a hand wheel nut 11.
The invention is installed on the safety oil circuit of the steam turbine, and the working principle is as follows: when the security oil pressure is normal, the security oil pressure is equal to the elastic force of the spring 7, the sealing plate 5 on the valve head 3 seals the oil drain hole 6, when the security oil is reduced to a certain degree at an emergency moment, the oil pressure is reduced, the valve rod 2 and the valve head 3 move down rapidly under the action of the spring force of the spring 7, the sealing plate 5 is driven to move down rapidly, the oil drain hole 6 is opened, and therefore oil is drained rapidly, a main throttle valve and a steam extraction valve are closed rapidly, and the steam turbine is not damaged due to overhigh speed. In order to recover the security oil pressure, the oil pressure of the security oil is changed from small to large in the recovery process, as the security oil leaks before, the pressure in the security oil chamber 4 is reduced and is smaller than the elastic force of the spring 7, the valve head 3 and the valve rod 2 are subjected to the downward elastic force of the spring 7, and the security oil pressure cannot be established, the upper hand wheel 1 must be pulled to counteract the elastic force to close oil drainage, so that the security oil is recovered, then the security oil pressure is recovered to be equal to the elastic force to establish the security oil pressure, and thus, the security oil pressure is prevented from rising to open the main steam valve and the steam extraction valve due to misoperation, so that accidents are caused.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A critical oil drain valve is characterized in that one end of a valve body (10) is provided with a valve cover (12), a valve rod (2) penetrates through the valve cover (12), the valve rod (2) is fixedly connected with a valve head (3) arranged inside the valve body (10), and an elastic part is sleeved on the part, located in the valve body (10), of the valve rod (2); an oil drainage hole (6) is formed in the outer surface of the valve body (10), and the valve head (3) can completely seal the valve seat hole; a safety oil chamber (4) is arranged at the bottom of the valve body (10), and a safety oil hole (8) is arranged at the bottom of the safety oil chamber (4); the top of the valve rod (2) is provided with a hand wheel (1), a baffle plate (9) is arranged between the valve rod (2) and the valve head (3), and the valve rod (2), the baffle plate (9) and the valve head (3) are fixedly connected through bolts from top to bottom; a sealing plate (5) is arranged on one side of the valve head (3), the sealing plate (5) can seal an oil drainage hole (6), the elastic piece is a spring (7), and the spring (7) is fixed between the baffle plate (9) and the valve cover (12).
2. A critical spill valve as in claim 1, characterised in that the valve stem (2) is connected to the hand wheel (1) by means of a hand wheel nut (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481494.XA CN108006280B (en) | 2017-12-29 | 2017-12-29 | Emergency oil drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481494.XA CN108006280B (en) | 2017-12-29 | 2017-12-29 | Emergency oil drain valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108006280A CN108006280A (en) | 2018-05-08 |
| CN108006280B true CN108006280B (en) | 2021-01-01 |
Family
ID=62049592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711481494.XA Active CN108006280B (en) | 2017-12-29 | 2017-12-29 | Emergency oil drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108006280B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6957799B2 (en) * | 2003-03-25 | 2005-10-25 | Amtrol, Inc. | Valve for a non-refillable pressurized container |
| CN102128293B (en) * | 2010-12-07 | 2012-05-09 | 杭州春江阀门有限公司 | Adjustable dynamic flow balance valve |
| CN201884741U (en) * | 2010-12-07 | 2011-06-29 | 杭州春江阀门有限公司 | Adjustable dynamic flow balance valve |
| CN203516894U (en) * | 2013-10-09 | 2014-04-02 | 吉首大学 | Automatic adjustment exhaust valve |
| CN203940016U (en) * | 2014-05-09 | 2014-11-12 | 南通龙鹰真空成套设备科技有限公司 | A hand valve for sealing the vacuum port of cryogenic container |
| CN204756061U (en) * | 2015-06-18 | 2015-11-11 | 徐影 | Novel warm control valve that leads to |
| CN205047962U (en) * | 2015-10-15 | 2016-02-24 | 北京海林绿建节能技术有限公司 | Dynamic balance manual regulation valve |
| CN207394045U (en) * | 2017-12-29 | 2018-05-22 | 沂源县华阳能源设备有限公司 | Critical gate gurgle valve |
-
2017
- 2017-12-29 CN CN201711481494.XA patent/CN108006280B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108006280A (en) | 2018-05-08 |
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