CN201865711U - Leakage-proof steam valve for steam turbine - Google Patents
Leakage-proof steam valve for steam turbine Download PDFInfo
- Publication number
- CN201865711U CN201865711U CN2010206352374U CN201020635237U CN201865711U CN 201865711 U CN201865711 U CN 201865711U CN 2010206352374 U CN2010206352374 U CN 2010206352374U CN 201020635237 U CN201020635237 U CN 201020635237U CN 201865711 U CN201865711 U CN 201865711U
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- CN
- China
- Prior art keywords
- valve
- steam
- sleeve
- locknut
- leakage
- 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.)
- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of a valve, and discloses a leakage-proof steam valve for a steam turbine. The leakage-proof steam valve is mainly and technically characterized in that a sleeve is arranged; a valve stem of a pre-starting valve arranged at the bottom end passes through the sleeve and is connected with a butterfly valve by a locknut; the valve stem is a solid shaft body; and at least one balancing tank is arranged at the locknut side on the joint surface of the pre-starting valve and the locknut. When the leakage-proof steam valve for the steam turbine is started, the valve steam moves up firstly and is contacted with the locknut; the front part and the rear part of the butterfly valve are communicated with the balancing tank; the butterfly valve has balanced pressure; subsequently the valve stem drives the locknut and the butterfly valve to move together to a fully opened position; and a convex shoulder of the valve steam is contacted with the sleeve. The balancing tank leads the butterfly valve to keep balanced pressure and reduces the force used for opening and closing the steam valve. The valve stem is a solid shaft body; when the steam valve is in a closed state, the steam does not enter the gas cylinder through the valve stem from the clearance between the locknut and the sleeve; and therefore, the steam valve can be sealed tightly.
Description
Technical field
The utility model belongs to valve technology field, relates in particular to the anti-steam leak-off valve of a kind of steam turbine.
Background technique
The steam valve that uses on the current steam turbine, the bottom is provided with sleeve, and the bottom is that the valve rod of equalizing valve passes sleeve and is connected with valve disc by lock nut, and lock nut and valve disc are connected as a single entity, the valve rod inner hollow, a plurality of equalizing orifices evenly distribute on the valve rod.When steam valve starts, valve rod at first moves up and contacts with lock nut, and hollow inside and equalizing orifice by valve rod before and after the valve disc connect, pressure balance before and after the valve disc, valve rod drives lock nut again and moves with valve disc and reach fully open position then, and the convex shoulder of valve rod contacts with sleeve.Because its front and back pressure balance when valve disc starts, thereby reduced the power of opening steam valve.For preventing that jam from appearring in lock nut and sleeve, have certain interval between lock nut and sleeve, steam valve is in off position the time, and steam can enter valve rod hollow inside by equalizing orifice by gap between lock nut and sleeve, enter cylinder then, thereby cause the steam valve bad sealing close.
The model utility content
The technical problems to be solved in the utility model just provides the anti-steam leak-off valve of a kind of tight-closed steam turbine.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: comprise sleeve, the bottom is that the valve rod of equalizing valve passes sleeve and is connected with valve disc by lock nut, described valve rod is solid axis body, has at least one compensating groove in the lock nut side on the mating face of equalizing valve and lock nut.
Its additional technical feature is: described compensating groove is four of symmetrical distribution.
The anti-steam leak-off valve of steam turbine provided by the utility model compared with prior art, the mating face of equalizing valve and lock nut has compensating groove, when steam valve starts, valve rod at first moves up and contacts with lock nut, connect by compensating groove before and after the valve disc, the valve disc pressure balance, valve rod drives lock nut again and moves with valve disc and reach fully open position then, and the convex shoulder of valve rod contacts with sleeve.Pressure balance when compensating groove starts valve disc has reduced the power that opens and closes steam valve.And valve rod is solid axis body, and steam valve is in off position the time, and steam can not enter cylinder by valve rod by gap between lock nut and sleeve, makes steam valve tight-closed.According to different needs, compensating groove can be four of symmetrical distribution or other arbitrarily.
Description of drawings
Fig. 1 is the structural representation of the anti-steam leak-off valve of the utility model steam turbine;
Fig. 2 is the structural representation of valve rod.
Embodiment
Be described in further details below in conjunction with the concrete structure and the use principle of accompanying drawing the anti-steam leak-off valve of steam turbine provided by the utility model.
As shown in Figure 1, the anti-steam leak-off valve of steam turbine provided by the utility model comprises sleeve 1, the bottom is that the valve rod 3 of equalizing valve 2 passes sleeve 1 and is connected with valve disc 5 by lock nut 4, valve rod 3 is solid axis body, has compensating groove 6 in lock nut 4 sides on the mating face of equalizing valve 2 and lock nut 4.As shown in Figure 2, the compensating groove 6 on the valve rod 3 bottom equalizing valves 2 can be four of symmetrical distribution or other arbitrarily.
When the anti-steam leak-off valve of steam turbine provided by the utility model starts, valve rod 3 at first moves up and contacts with lock nut 4, valve disc 5 front and back connect by compensating groove 6, valve disc 5 pressure balances, valve rod 3 drives lock nut 4 again and moves with valve disc 5 and reach fully open position then, and the convex shoulder of valve rod 3 contacts with sleeve 1.Pressure balance when compensating groove 6 starts valve disc 5 has reduced the power that opens and closes steam valve.And valve rod 3 is solid axis body, and steam valve is in off position the time, and steam can not enter cylinder by valve rod 3 by lock nut 4 and 1 gap of sleeve, makes steam valve tight-closed.
Claims (2)
1. steam turbine is prevented steam leak-off valve, comprise sleeve, the bottom is that the valve rod of equalizing valve passes sleeve and is connected with valve disc by lock nut, and it is characterized in that: described valve rod is solid axis body, has at least one compensating groove in the lock nut side on the mating face of equalizing valve and lock nut.
2. steam turbine according to claim 1 is prevented steam leak-off valve, it is characterized in that: described compensating groove is four of symmetrical distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206352374U CN201865711U (en) | 2010-12-01 | 2010-12-01 | Leakage-proof steam valve for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206352374U CN201865711U (en) | 2010-12-01 | 2010-12-01 | Leakage-proof steam valve for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865711U true CN201865711U (en) | 2011-06-15 |
Family
ID=44136868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206352374U Expired - Fee Related CN201865711U (en) | 2010-12-01 | 2010-12-01 | Leakage-proof steam valve for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865711U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658498A (en) * | 2020-12-23 | 2022-06-24 | 上海电气电站设备有限公司 | Steam turbine combined valve and design method thereof |
-
2010
- 2010-12-01 CN CN2010206352374U patent/CN201865711U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658498A (en) * | 2020-12-23 | 2022-06-24 | 上海电气电站设备有限公司 | Steam turbine combined valve and design method thereof |
| CN114658498B (en) * | 2020-12-23 | 2024-03-19 | 上海电气电站设备有限公司 | Combined valve of steam turbine and design method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20141201 |
|
| EXPY | Termination of patent right or utility model |