CN102191953A - Steam turbine single-valve adjusting valve - Google Patents
Steam turbine single-valve adjusting valve Download PDFInfo
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- CN102191953A CN102191953A CN2011101383500A CN201110138350A CN102191953A CN 102191953 A CN102191953 A CN 102191953A CN 2011101383500 A CN2011101383500 A CN 2011101383500A CN 201110138350 A CN201110138350 A CN 201110138350A CN 102191953 A CN102191953 A CN 102191953A
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Abstract
The invention discloses a steam turbine single-valve adjusting valve, which comprises a valve shell, wherein a chamber is formed in the valve shell; a partition board is arranged in the chamber, and the partition board partitions the chamber into a first chamber and a second chamber; the partition board is provided with a valve seat, and a valve disc is arranged in the valve seat; one end of the valve disc is connected with an adjusting valve rod, and the other end of the valve disc is connected with a balancing device; and the adjusting valve rod and the balancing device are positioned in the first chamber and the second chamber respectively. Because a balance piston type structure is adopted, the pull used in starting is low, the instability during starting is greatly reduced, a high-pressure oil mover and high-pressure oil passage equipment are removed, and only one high-precision actuator is adopted; and because single-valve adjustment is adopted, the instability when a plurality of valve discs are switched during operating is eliminated.
Description
Technical field
The present invention relates to a kind of modulating valve, relate to a kind of steam turbine single valve modulating valve specifically, belong to steam turbine and make the field.
Background technique
For the small power generation steam turbine set, vapour is controlled unit by the size of modulating valve control throttle flow load is joined in its adjusting, the unlatching of modulating valve need be provided with a high pressure servo-motor and a cover high-pressure oil passage equipment, in the process that steam turbine set starts, the valve disc of modulating valve need overcome initial high-pressure steam pressure and just can open, this initial procedure is unsettled, causes the fluctuation of generating unit speed easily.
At present, the small power generation steam turbine set all is that the group's valve that adopts is carried board-like modulating valve, needs to adopt an oil engine to open modulating valve, inevitably can produce above-mentioned influence in the process of opening.As shown in Figure 1, group's valve is carried board-like modulating valve and is comprised valve body, valve body is provided with regulating valve stem 1, crossbeam 3, valve disc 4 and valve seat 5, seal by gasket seal 2 between regulating valve stem 1 and the valve body, it need lean on a plurality of valve discs 4 to open successively and regulate throttle flow, in valve disc 4 standard-sized sheets and another valve disc 4 first handoff procedures of opening, need to set a degree of overlapping, degree of overlapping is difficult for adjusting when mounted, cause certain error easily, so that cause in valve disc 4 handoff procedures instability of load or rotating speed.
Summary of the invention
The problem to be solved in the present invention be to provide a kind of can effectively eliminate in the steam turbine set opening process and the valve disc handoff procedure in the instable steam turbine single valve modulating valve that produces, and can save the high pressure oil system.
In order to address the above problem, the present invention by the following technical solutions: a kind of steam turbine single valve modulating valve comprises
Valve casing has chamber in the valve casing;
Be provided with dividing plate in the chamber, described dividing plate is separated into first chamber and second chamber with chamber;
Described dividing plate is provided with valve seat, and a valve disc is installed in the described valve seat;
A wherein end of valve disc is connected with regulating valve stem, and the other end is connected with Equilibrator;
Regulating valve stem and Equilibrator lay respectively in first chamber and second chamber.
Below be further improvement of these options of the present invention:
Modulating valve covers seal sleeve and support packing is installed;
Regulating valve stem and seal sleeve and support packing are slidingly connected respectively.
Seal sleeve and support packing play seal action jointly, and the support packing also plays and closely supports the valve disc effect.
Further improve:
Equilibrator comprises the balance valve rod that is connected with valve disc;
The other end of balance valve rod is connected with equalizing piston and end cover;
Be provided with the 3rd chamber that is communicated with second chamber in the valve casing;
Described equalizing piston and end cover are positioned at the 3rd chamber.
Further improve:
The outside of valve casing is provided with sealing flange near the position of the 3rd chamber;
On sealing flange, be provided with the balance admission opening that is communicated with the 3rd chamber.
Further improve:
Be provided with the balanced seal sleeve in described the 3rd chamber;
Described equalizing piston and end cover are positioned at the balanced seal sleeve and are slidingly connected with the balanced seal sleeve seal.
Further improve:
The sectional area of described equalizing piston is less than the sectional area of valve disc.
Further improve:
Valve casing is provided with steam inlet that is communicated with first chamber and the steam (vapor) outlet that is communicated with second chamber.
Further improve:
Described valve casing is provided with balance vapor opening and the weep hole that is communicated with first chamber;
The balance vapor opening is communicated with by external pipe with the balance admission opening.
Further improve:
Described valve casing is provided with the speed of often opening that is communicated with the 3rd chamber and closes the hole, often opens hole, speed pass and often is arranged.
Condensed water is in time drained when quick steam discharge when having guaranteed equalizing piston speed pass and normal operation.
Further improve:
Often open speed and close the diameter of section of the diameter of section in hole, guarantee that the 3rd chamber pressure equates with first chamber pressure less than the balance admission opening.
Before the unlatching, valve disc is in closed condition, and balance vapor opening and balance admission opening are connected together by external pipe, and at this moment, first chamber is not communicated with second chamber.
The useful area of valve disc is the hole area of valve seat, and before the unlatching, because of the sectional area of the described equalizing piston sectional area less than valve disc, steam is very little to the effective pressure of valve disc, uses very little power just can open valve disc by the pulling regulating valve stem like this.
In opening process, first chamber equates with the 3rd chamber pressure, be positioned at the pressure approximately equal of valve disc right-hand member and equalizing piston left end in second chamber, therefore steam is slightly larger than the power of steam to equalizing piston all the time to the power of valve disc, make valve disc can stablize unlatching, guarantee the stability of steam flow, and then guarantee the stability of steam turbine set operation.
When the needs emergency cut-off, the balance vapor opening was cut off with being communicated with of balance admission opening, the residue vapor of the 3rd chamber drains by often opening hole, speed pass rapidly, the 3rd chamber pressure approaches atmospheric pressure, at this moment equalizing piston moves rapidly under the promotion of steam to the right, valve disc is closed, reach the effect that speed is closed.
The present invention has adopted equalizing piston formula structure, the equalizing piston area is slightly less than the valve disc useful area, make the pulling force that uses when opening very little, unstability when greatly having reduced to open, and high pressure servo-motor and high-pressure oil passage equipment have been removed, only adopt a highi degree of accuracy final controlling element to get final product, because the present invention has adopted speed open in usual to close the hole, condensed water was in time drained when quick exhaust steam was with normal operation when equalizing piston speed was closed, prevented the ponding water erosion of equalizing piston side, the present invention has adopted the single valve adjusting, has eliminated the unstability when a plurality of valve discs switch in the running.
The present invention will be further described below in conjunction with description of drawings and embodiment.
Description of drawings
Accompanying drawing 1 is the structural representation of existing general turbine governor valve in the background technique of the present invention;
Accompanying drawing 2 is the structural representation of steam turbine single valve modulating valve in the embodiment of the invention;
Accompanying drawing 3 is that A-A in the accompanying drawing 2 is to sectional view.
Among the figure: the 1-regulating valve stem; 2-gasket seal group; The 3-crossbeam; The 4-valve disc; The 5-valve seat; 6-regulates valve gap; The 7-seal sleeve; 8-support packing; 9-balance valve rod; 10-balanced seal sleeve; The 11-equalizing piston; The 12-end cover; The 13-valve casing; The 14-dividing plate; The 15-sealing flange; A-balance vapor opening; B-balance admission opening; The C-weep hole; D-often opens speed and closes the hole; E-first chamber; F-second chamber; The G-steam (vapor) outlet; The H-steam inlet; X-the 3rd chamber.
Embodiment
Embodiment, as Fig. 2, shown in Figure 3, a kind of steam turbine single valve modulating valve comprises valve casing 13;
Have chamber in the valve casing 13, be provided with dividing plate 14 in the chamber, described dividing plate 14 is separated into the first chamber E and the second chamber F with chamber;
Valve casing 13 is provided with steam inlet H that is communicated with the first chamber E and the steam (vapor) outlet G that is communicated with the second chamber F;
Be provided with near the position of the first chamber E on the valve casing 13 and regulate valve gap 6, regulate valve gap 6 by bolt to valve casing 13;
Described dividing plate 14 is provided with valve seat 5, and a valve disc 4 is installed in the described valve seat 5;
A wherein end of valve disc 4 is connected with regulating valve stem 1, and the other end is connected with Equilibrator;
The other end of regulating valve stem 1 is slidingly connected with adjusting valve gap 6.
The other end of balance valve rod 9 is connected with equalizing piston 11 and end cover 12.
Regulate on the valve gap 6 seal sleeve 7 and support packing 8 are installed, regulating valve stem 1 is slidingly connected respectively with seal sleeve 7 and support packing 8.
Equilibrator comprises the balance valve rod 9 that is connected with valve disc 4;
The other end of balance valve rod 9 is connected with equalizing piston 11 and end cover 12;
Be provided with the 3rd chamber X that is communicated with the second chamber F in the valve casing 13;
Described equalizing piston 11 and end cover 12 are positioned at the 3rd chamber X.
The outside of valve casing 13 is provided with sealing flange 15 near the position of the 3rd chamber X, is provided with the balance admission opening B that is communicated with the 3rd chamber X on sealing flange 15.
Be provided with balanced seal sleeve 10 in described the 3rd chamber X, described equalizing piston 11 and end cover 12 are positioned at balanced seal sleeve 10 and are dynamically connected with balanced seal sleeve 10 sealed sliding.
Balance valve rod 9 and equalizing piston 11 are for freely being connected, and balance valve rod 9 relies on end nut and end cover 12 to drive equalizing pistons 11 and moves.
Described valve casing 13 is provided with balance vapor opening A and the weep hole C that is communicated with the first chamber E.
The sectional area of described equalizing piston 11 is less than the sectional area of valve disc 4.
When valve disc 4 was opened, the steam in the first chamber E entered the second chamber F by valve seat 5;
Balance vapor opening A and balance admission opening B are connected together by external pipe, make the steam of the first chamber E enter the 3rd chamber X by external pipe.
Described valve casing 13 is provided with the speed of often opening that is communicated with the 3rd chamber X and closes hole D, and the diameter of often opening speed pass hole D guarantees that less than balance admission opening B diameter the 3rd chamber X pressure equates with the first chamber E pressure.
Before the unlatching, valve disc 4 is in closed condition, and balance vapor opening A and balance admission opening B are connected together by external pipe, and at this moment, the first chamber E is not communicated with the second chamber F.
The useful area of valve disc 4 is the hole area of valve seat 5, and before the unlatching, because of the sectional area of described equalizing piston 11 sectional area less than valve disc 4, steam is very little to the effective pressure of valve disc 4, uses very little power just can open valve disc 4 by pulling regulating valve stem 1 like this.
In opening process, the first chamber E equates with the 3rd chamber X pressure, be positioned at the pressure approximately equal of valve disc 4 right-hand members and equalizing piston 11 left ends in the second chamber F, therefore steam is slightly larger than the power of steam to equalizing piston 11 all the time to the power of valve disc 4, make valve disc 4 can stablize unlatching, guarantee the stability of steam flow, and then guarantee the stability of steam turbine set operation.
When the needs emergency cut-off, balance vapor opening A was cut off with being communicated with of balance admission opening B, the residue vapor of the 3rd chamber X drains by often opening speed pass hole D rapidly, the 3rd chamber X pressure approaches atmospheric pressure, at this moment equalizing piston 11 moves rapidly under the promotion of steam to the right, valve disc 4 is closed, reach the effect that speed is closed.
Often opening speed pass hole D is important setting; for often being arranged, forbid to close in the running, when emergency shutdown, can discharge equalizing piston 11 rapidly and move the steam that overstocks at the 3rd chamber X; play the effect that speed is closed, in addition also play the hydrophobic effect in start and the normal course of operation.
Claims (10)
1. steam turbine single valve modulating valve comprises: valve casing (13),
Valve casing has chamber in (13);
Be provided with dividing plate (14) in the chamber, described dividing plate (14) is separated into first chamber (E) and second chamber (F) with chamber;
It is characterized in that: described dividing plate (14) is provided with valve seat (5), and a valve disc (4) is installed in the described valve seat (5);
A wherein end of valve disc (4) is connected with regulating valve stem (1), and the other end is connected with Equilibrator;
Regulating valve stem (1) is positioned at first chamber (E), Equilibrator is positioned at second chamber (F).
2. steam turbine single valve modulating valve according to claim 1 is characterized in that:
The position that valve casing (13) is gone up near first chamber (E) is provided with adjusting valve gap (6);
Regulate on the valve gap (6) seal sleeve (7) and support packing (8) are installed;
Be slidingly connected respectively between regulating valve stem (1) and seal sleeve (7) and the support packing (8).
3. steam turbine single valve modulating valve according to claim 1 and 2 is characterized in that:
Described Equilibrator comprises the balance valve rod (9) that is connected with valve disc (4);
The other end of balance valve rod (9) is connected with equalizing piston (11) and end cover (12);
Be provided with the 3rd chamber (X) that is communicated with second chamber (F) in the valve casing (13);
Described equalizing piston (11) and end cover (12) are positioned at the 3rd chamber (X).
4. steam turbine single valve modulating valve according to claim 3 is characterized in that:
The outside of valve casing (13) is provided with sealing flange (15) near the position of the 3rd chamber (X);
On sealing flange (15), be provided with the balance admission opening (B) that is communicated with the 3rd chamber (X).
5. steam turbine single valve modulating valve according to claim 4 is characterized in that:
Be provided with balanced seal sleeve (10) in described the 3rd chamber (X);
Described equalizing piston (11) and end cover (12) are positioned at balanced seal sleeve (10) and are dynamically connected with balanced seal sleeve (10) sealed sliding.
6. steam turbine single valve modulating valve according to claim 5 is characterized in that:
The sectional area of described equalizing piston (11) is less than the sectional area of valve disc (4).
7. steam turbine single valve modulating valve according to claim 5 is characterized in that:
Valve casing (13) is provided with steam inlet (H) that is communicated with first chamber (E) and the steam (vapor) outlet (G) that is communicated with second chamber (F).
8. steam turbine single valve modulating valve according to claim 7 is characterized in that:
Described valve casing (13) is provided with balance vapor opening (A) and the weep hole (C) that is communicated with first chamber (E);
Balance vapor opening (A) is communicated with by external pipe with balance admission opening (B).
9. steam turbine single valve modulating valve according to claim 8 is characterized in that:
Described valve casing (13) is provided with the speed of often opening that is communicated with the 3rd chamber (X) and closes hole (D), often opens speed hole, pass (D) and often is arranged.
10. steam turbine single valve modulating valve according to claim 9 is characterized in that:
Often open speed and close the diameter of section of the diameter of section in hole (D) less than balance admission opening (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138350 CN102191953B (en) | 2011-05-26 | 2011-05-26 | Steam turbine single-valve adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138350 CN102191953B (en) | 2011-05-26 | 2011-05-26 | Steam turbine single-valve adjusting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102191953A true CN102191953A (en) | 2011-09-21 |
| CN102191953B CN102191953B (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110138350 Expired - Fee Related CN102191953B (en) | 2011-05-26 | 2011-05-26 | Steam turbine single-valve adjusting valve |
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| Country | Link |
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| CN (1) | CN102191953B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359650A (en) * | 2011-10-31 | 2012-02-22 | 浙江华元汽轮机械有限公司 | High-temperature high-pressure steam split-ranging valve control device |
| CN106763934A (en) * | 2016-12-20 | 2017-05-31 | 嘉兴爱克斯机械技术有限公司 | The lift check and cut-off combination valve of dual drive quick closedown |
| CN108843411A (en) * | 2018-06-29 | 2018-11-20 | 东方电气集团东方汽轮机有限公司 | A kind of oxidation resistant steam turbine high-temperature component |
| CN112302735A (en) * | 2020-10-26 | 2021-02-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
| CN112983568A (en) * | 2019-12-16 | 2021-06-18 | 上海电气电站设备有限公司 | Steam turbine lifting plate valve structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB783101A (en) * | 1954-11-12 | 1957-09-18 | British Thomson Houston Co Ltd | Improvements relating to steam valves |
| JPH11351411A (en) * | 1998-06-08 | 1999-12-24 | Mitsubishi Heavy Ind Ltd | Adjusting valve |
| CN2524019Y (en) * | 2001-11-26 | 2002-12-04 | 牛凤山 | Slow shutting silenced hydraulic control valve |
| CN2611711Y (en) * | 2003-03-21 | 2004-04-14 | 梁佩生 | Automatic on-off valve |
| US6931831B2 (en) * | 2002-06-18 | 2005-08-23 | Jansen's Aircraft Systems Controls, Inc. | Distributor purge valve |
| CN202090966U (en) * | 2011-05-26 | 2011-12-28 | 山东青能动力股份有限公司 | Turbine single-valve regulating valve |
-
2011
- 2011-05-26 CN CN 201110138350 patent/CN102191953B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB783101A (en) * | 1954-11-12 | 1957-09-18 | British Thomson Houston Co Ltd | Improvements relating to steam valves |
| JPH11351411A (en) * | 1998-06-08 | 1999-12-24 | Mitsubishi Heavy Ind Ltd | Adjusting valve |
| CN2524019Y (en) * | 2001-11-26 | 2002-12-04 | 牛凤山 | Slow shutting silenced hydraulic control valve |
| US6931831B2 (en) * | 2002-06-18 | 2005-08-23 | Jansen's Aircraft Systems Controls, Inc. | Distributor purge valve |
| CN2611711Y (en) * | 2003-03-21 | 2004-04-14 | 梁佩生 | Automatic on-off valve |
| CN202090966U (en) * | 2011-05-26 | 2011-12-28 | 山东青能动力股份有限公司 | Turbine single-valve regulating valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359650A (en) * | 2011-10-31 | 2012-02-22 | 浙江华元汽轮机械有限公司 | High-temperature high-pressure steam split-ranging valve control device |
| CN106763934A (en) * | 2016-12-20 | 2017-05-31 | 嘉兴爱克斯机械技术有限公司 | The lift check and cut-off combination valve of dual drive quick closedown |
| CN106763934B (en) * | 2016-12-20 | 2023-05-05 | 嘉兴爱克斯机械技术有限公司 | Double-drive quick-closing lifting type non-return and stop combined valve |
| CN108843411A (en) * | 2018-06-29 | 2018-11-20 | 东方电气集团东方汽轮机有限公司 | A kind of oxidation resistant steam turbine high-temperature component |
| CN112983568A (en) * | 2019-12-16 | 2021-06-18 | 上海电气电站设备有限公司 | Steam turbine lifting plate valve structure |
| CN112302735A (en) * | 2020-10-26 | 2021-02-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
| CN112302735B (en) * | 2020-10-26 | 2022-08-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102191953B (en) | 2013-08-21 |
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Granted publication date: 20130821 Termination date: 20200526 |