CN102787871A - Main steam valve of steam turbine - Google Patents
Main steam valve of steam turbine Download PDFInfo
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- CN102787871A CN102787871A CN2012102357404A CN201210235740A CN102787871A CN 102787871 A CN102787871 A CN 102787871A CN 2012102357404 A CN2012102357404 A CN 2012102357404A CN 201210235740 A CN201210235740 A CN 201210235740A CN 102787871 A CN102787871 A CN 102787871A
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Abstract
The invention discloses a main steam valve of a steam turbine. The main steam valve comprises a valve body, a bonnet and a valve stem, wherein an upstream steam passage, a downstream steam passage, a valve stem assembly hole, a bonnet assembly hole and a valve seat are formed on the valve body. The bonnet mainly comprises an inner bonnet, an elastic sealing ring, a hold-down ring and a locating ring which are arranged in the bonnet assembly hole from the bottom up in sequence, and an outer bonnet which is fixed at the outer end of the bonnet assembly hole through fixing bolts, wherein the inner bonnet is subjected to self-tightening seal and bears most pressure, the outer bonnet bears less pressure, and the sealing effect is good. The upper end of the valve stem passes through a sleeve and is connected with a valve disc, and under the operation of the valve stem, the valve disc is matched with the valve seat to close or open the upstream steam passage and the downstream steam passage on the valve body. A sealing cartridge is arranged on the sleeve, and a sealing cone is arranged on the valve stem. When the valve disc and the valve seat are open, the valve stem is sealed with the sealing cartridge through the sealing cone, and the opening of the valve disc is limited by the sealing cone. The main steam valve has the characteristics that the main steam valve is good in sealing performance, low in production cost, high in practicability and capable of bearing high parameter steam.
Description
Technical field
The present invention relates to steam turbine, specifically is a kind of Steam Turbine's Main Vaper Valve door.
Background technique
The Steam Turbine's Main Vaper Valve door is the first road valve of steam turbine; Through the opening and closing of main vapour valve, realize the supply and the cut-out of steam turbine steam, thereby main vapour valve moves in the steam ambient of HTHP for a long time; Require main vapour valve to have good sealing property; In case the steam leakage of HTHP causes heat-energy losses, even security incident takes place.
Referring to Fig. 1: traditional Steam Turbine's Main Vaper Valve door comprises valve body 08, valve gap 010 and valve rod 01.Wherein, valve body 08 is interior hollow structure, and valve body 08 is provided with upper reaches stream passageway 012, downstream stream passageway 013, valve rod pilot hole and valve gap pilot hole; Upper reaches stream passageway 012 and the 013 radial misalignments setting of downstream stream passageway, valve body 08 internal surface between upper reaches stream passageway 012 and the downstream stream passageway 013 is fixed with valve seat 014; Be equipped with sleeve 02 through limited step 015 and pressing plate 04 on the valve rod pilot hole; Sleeve 02 stretches in the valve rod pilot hole; Periphery is the location on the inner limited step 015 of valve rod pilot hole; Pressing plate 04 is fixed on the outer end of sleeve 02 through turnbuckle 016, and is spacing by the outer end of valve rod pilot hole, and pressing plate is fixed on the outer end of valve rod pilot hole through fixing bolt 05; Be respectively equipped with the pilot hole that valve rod 01 is led on pressing plate 04 and the sleeve 02, the pilot hole coaxial line on pilot hole on the pressing plate 04 and the sleeve 02 is arranged.Valve gap 010 is an overall structure, and clamping bolt 011 sealing through big specification is assemblied on the valve gap pilot hole of valve body 08, relies on the tight power of big specification clamping bolt 011 and valve body 08 to produce contact stress, realizes sealing.The upper end of valve rod 01 is passed pressing plate 04 and is connected valve disc 09 with pilot hole on the sleeve 02, and under the action of valve rod 01, valve disc 09 cooperates with valve seat 014 on the valve body 08, and upper reaches stream passageway on the valve body 08 012 and downstream stream passageway 013 are cut off or get through; In order to guarantee the freedom of valve rod 01 action; Must keep certain clearance between valve rod 01 and the sleeve 02, the width in this gap is generally 0.20～0.35mm, so just makes the annular space that forms wide about a 0.20～0.35mm between valve rod 01 and the sleeve 02; This annular space can produce serious leakage vapour phenomenon; Leak into machine room for fear of steam, on valve body 08, be provided with first steam bleeder connection 06 and second steam bleeder connection 07, these two steam bleeder connections communicate respectively at annular space; First steam bleeder connection 06 is connected on No. three high-pressure heaters or the oxygen-eliminating device, and second steam bleeder connection 07 is connected on the gland steam heater.This main vapour valve has caused a large amount of high-quality steam to bleed in the low level vapour system through the annular space between valve rod 01 and the sleeve 02; Caused certain heat-energy losses; Increased the operation cost of steam turbine, this more highlights on the ultra supercritical unit of high parameter steam or double reheat unit.In order to reduce steam leakage, conventional method is to adorn a gland sleeve 03 on the valve rod 01 in sleeve 02, though this method can play certain leak stopping effect, it has little effect, and still has the phenomenon of a large amount of high-quality steam leakages, poor reliability.
In addition, above-mentioned integrally-built valve gap 010 relies on clamping bolt 011 sealing to be assemblied on the valve gap pilot hole of valve body 08, in the steam ambient of HTHP fully; The pressure that valve gap 010 bears is big, and this also particularly highlights on the ultra supercritical unit of high parameter steam or double reheat unit, in order to guarantee valve gap 010 reliable tightness and constant intensity; Require clamping bolt 011 to have good structural strength, and the structural strength of clamping bolt 011 improve, and is to upgrade through the material to clamping bolt 011; And the increase of specification (comprising diameter and length) realization; This has not only increased the manufacture cost of main vapour valve, and even more serious is, along with the increase of clamping bolt 011; Design, difficulty of processing to clamping bolt also increase thereupon; The clamping bolt of increase valve gap simply certainly will also damage the structural stress of valve gap and valve body, thereby makes whole main vapour valve design, difficulty of processing increase, and shorten working life; Manufacturing efficient reduces, and enterprise's manufacture cost significantly increases.
Summary of the invention
The objective of the invention is to: to the deficiency of above-mentioned existing technology, a kind of good seal performance, reliable and stable, the Design and Machining that makes things convenient for, low cost of manufacture are provided, can bear the Steam Turbine's Main Vaper Valve door of high parameter steam.
Above-mentioned technical purpose of the present invention realizes that through following technical proposals a kind of Steam Turbine's Main Vaper Valve door comprises:
-valve body; Said valve body is provided with upper reaches stream passageway, downstream stream passageway, valve rod pilot hole and valve gap pilot hole; Be fixed with valve seat on the valve body between upper reaches stream passageway and the downstream stream passageway; Be equipped with sleeve through limited step and pressing plate on the valve rod pilot hole, be respectively equipped with the pilot hole that valve rod is led on pressing plate and the sleeve;
-valve gap, said valve bonnet seal are assemblied on the valve gap pilot hole of valve body;
-valve rod; The upper end of said valve rod is passed pressing plate and is connected valve disc with pilot hole on the sleeve; Have annular space between valve rod and the sleeve, this annular space communicates with first steam bleeder connection on being connected valve body, under the action of valve rod; Valve seat on valve disc and the valve body cooperates, and upper reaches stream passageway on the valve body and downstream stream passageway are cut off or get through; The inner place of the pilot hole of said sleeve is provided with stuffing box gland; Said valve rod is provided with sealing cone near inner place, cage guiding hole; When valve disc and valve seat were opened, valve rod was realized sealing through sealing cone and the stuffing box gland on the sleeve, and does spacing through sealing cone to the aperture of valve disc and valve seat.
Said valve gap is mainly by being assemblied in interior valve gap in the valve gap pilot hole, elastic seal ring, hold-down ring, positioning ring from top to bottom successively and constituting through the outer valve gap that fixing bolt is fixed on valve gap pilot hole outer end; Interior valve gap is connected through second turnbuckle with outer valve gap; The periphery of positioning ring is embedded on the locating slot in the valve gap pilot hole, the end face that is pressed in hold-down ring interior week of positioning ring.
Valve gap and hold-down ring are respectively with the conical surface and elastic seal ring butt in said.
Have elastic groove on the outer circumferential face of said elastic seal ring, the sealing surface of elastic seal ring has some double wedges.
Said positioning ring is a segmental structure, is made up of at least two segmental arcs.
The hollow protecting jacket that the bottom surface of valve gap has corresponding coupling with valve disc in said, protecting jacket is provided with a plurality of steam through holes.
Be connected with on the said outer valve gap with the valve gap pilot hole in second steam bleeder connection that communicates of space.
Sealing cone on the said valve rod is the 45o conical surface, and built-up welding has stellite on the sealing cone.
Has the sealing cone that is matched with sealing cone on the valve rod on the said stuffing box gland.
The present invention has following major advantage:
1. when valve is in open mode; Form the sealing of reliable and stable between the stuffing box gland on valve rod and the sleeve through sealing cone, favorable sealing property has reached the effect of zero leakage; Make turbine efficiency that the income up to 12KJ/kwh arranged, effectively reduce the operation cost of steam turbine;
2. valve gap adopts the interior valve gap and outer valve gap of split, and the positioning ring that interior valve gap is embedded on the valve gap pilot hole is spacing fixing, and outer valve gap is fixed by fixing bolt; Most pressure of steam are born by interior valve gap, under the effect of vapor pressure in valve gap realize self-locking, fixing reliable; Outer valve gap only bears small vapor pressure, and this greatly reduces the structural strength requirement of external valve gap fixing bolt, has avoided upgrading and the expansion of specification to the fixing bolt material; Effectively reduce design, the difficulty of processing of outer valve gap fixing bolt; Can not destroy simultaneously the structural stress of valve body, valve gap yet, reduce whole design, the difficulty of processing of valve, prolong the working life of valve; Improve manufacturing efficient, reduced enterprise's manufacture cost;
3. the sealing effect of forming the elastic seal ring of valve gap is directly proportional with the vapor pressure that interior valve gap affords; The vapor pressure that valve gap affords in that is to say is big more; The amount of deformation of elastic seal ring is big more, and sealing effect is also just good more, has effectively avoided steam to leak from valve gap; In addition, the sealing configuration of elastic seal ring (comprise self structure and with the cooperating structure of other parts) design has further promoted sealing effect;
4. the positioning ring of forming valve gap designs with segmental structure, greatly facilitates the combine and assemble of valve gap on valve body; When elastic seal ring contingency runs into seal failure; Leak the steam that gets into space in the valve gap pilot hole and introduce gland steam heater through second steam bleeder connection on the outer valve gap; Further reduced the vapor pressure that outer valve gap affords; Guarantee the constant intensity of outer valve gap on valve body, improve the Security of valve operation;
5. the present invention is except being fit to common steam turbine unit use, and the ultra supercritical unit or the double reheat unit that can also be fit to high parameter steam use, and have good sealing property and reliability equally, and be practical.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is the structural representation of traditional Steam Turbine's Main Vaper Valve door.
Fig. 2 is a kind of structural representation of the present invention.
Fig. 3 is the local A enlarged view among Fig. 2.
Code name implication among Fig. 1: 01-valve rod; 02-sleeve; 03-gland sleeve; 04-pressing plate; 05-fixing bolt; 06-the first steam bleeder connection; 07-the second steam bleeder connection; 08-valve body; 09-valve disc; 010-valve gap; 011-clamping bolt; 012-upper reaches stream passageway; 013-downstream stream passageway; 014-valve seat; 015-limited step; 016-turnbuckle.
Code name implication among Fig. 2 and Fig. 3: 1-valve rod; 2-sleeve; 3-pressing plate; 4-the first turnbuckle; 5-valve body; 6-limited step; 7-interior valve gap; 8-elastic seal ring; 9-hold-down ring; 10-positioning ring; 11-gasket seal; 12-outer valve gap; 13-the second turnbuckle; 14-fixing bolt; 15-sealing cone; 16-protecting jacket; 17-steam through hole; 18-valve disc; 19-valve seat; 20-strainer body; 21-steam (vapor) outlet hole; 22-equalizing valve dish; 23-upper reaches stream passageway; 24-downstream stream passageway; 25-the first steam bleeder connection; 26-annular space; 27-the second steam bleeder connection; 28-stuffing box gland.
Embodiment
Referring to Fig. 2 and Fig. 3: the present invention includes valve body 5, valve gap and valve rod 1.
Wherein, valve body 5 is interior hollow structure, and promptly valve body 5 has internal surface and outer surface.On valve body 5, be provided with upper reaches stream passageway 23, downstream stream passageway 24, valve rod pilot hole and valve gap pilot hole; Upper reaches stream passageway 23 and the 24 radial misalignments settings of downstream stream passageway, valve body 5 internal surfaces between upper reaches stream passageway 23 and the downstream stream passageway 24 are fixed with valve seat 19.The valve gap pilot hole is located at the top of valve body 5.The valve rod pilot hole is located at the bottom of valve body 5; The inner of valve rod pilot hole is provided with limited step 6, has stretched into sleeve 2 in the valve rod pilot hole, and the periphery of sleeve 2 is the location on the inner limited step 6 of valve rod pilot hole; Be provided with grooved metal gasket between limited step 6 and the sleeve 2, to improve its sealing; The bottom of sleeve 2 extends to the outer end of valve rod pilot hole; The bottom of sleeve 2 is fixed with pressing plate 3 through first turnbuckle 4; Pressing plate 3 is by the location, outer end of valve rod pilot hole, and so far, the valve rod pilot hole is through limited step 6 and pressing plate 3 assembling sleeves 2; In order to improve the steadiness of pressing plate 3, can pressing plate 3 be fixed on the valve body 5 through fixing bolt.On pressing plate 3 and sleeve 2, be respectively equipped with the pilot hole that valve rod 1 is led, the pilot hole on pilot hole on the pressing plate 3 and the sleeve 2 should arrange that the inner place of the pilot hole of sleeve 2 is provided with stuffing box gland 28 with coaxial line.
Valve gap is mainly by being assemblied in interior valve gap 7 in the valve gap pilot hole, elastic seal ring 8, hold-down ring 9, positioning ring 10 and constituting through the outer valve gap 12 that fixing bolt 14 is fixed on valve gap pilot hole outer end from top to bottom successively, and the external diameter of interior valve gap 7, elastic seal ring 8 and hold-down ring 9 should be complementary with the internal diameter of valve gap pilot hole.Interior valve gap 7 is connected through second turnbuckle 13 with outer valve gap 12; The bottom surface of interior valve gap 7 has the hollow protecting jacket 16 with valve disc 18 corresponding couplings; Protecting jacket 16 is provided with a plurality of steam through holes 17, is provided with strainer body 20 between the bottom surface of interior valve gap 7 and the valve seat 19, gets in the steam turbine to prevent foreign matter.Elastic seal ring 8 selects for use soft attitude high temperature material to be made, for example 06Cr19Ni10; The sealing surface of valve gap 7 and hold-down ring 9 is respectively the conical surface in elastic seal ring 8 contacts; The cross section of elastic seal ring 8 is triangular in shape; Have elastic groove on the outer circumferential face of elastic seal ring 8, to improve the amount of deformation of elastic seal ring 8, the sealing surface of elastic seal ring 8 (mainly being the face of valve gap 7, hold-down ring 9 and valve gap pilot hole inwall in the contact) has some double wedges; These double wedges are conical tooth, and gradient is about 45o.Positioning ring 10 is a segmental structure; Be made up of four segmental arcs, the periphery of positioning ring 10 is embedded on the locating slot in the valve gap pilot hole, the end face that is pressed in hold-down ring 9 interior week of positioning ring 10; The intensity of positioning ring 10 meets the demands through adjusting its thickness, and design difficulty is little.Be connected with on the outer valve gap 12 with the valve gap pilot hole in second steam bleeder connection 27 that communicates of space, this second steam bleeder connection 27 is connected with gland steam heater, draws with this steam that will leak to space in the valve gap pilot hole, reduces the vapor pressure that outer valve gap 12 is born.
The upper end of valve rod 1 is passed pressing plate 3 and is connected valve disc 18 with pilot hole on the sleeve 2, and the upper lid of valve disc 18 is in the protecting jacket 16 of interior valve gap 7.The top of valve disc 18 is connected with equalizing valve dish 22; Steam (vapor) outlet hole on the equalizing valve dish 22 communicates with steam (vapor) outlet hole 21 on the valve disc 18; Can effectively improve the flow velocity of steam through valve disc 18 and the steam (vapor) outlet hole on the equalizing valve dish 22, thus the balance of steam in balance upper reaches stream passageway 23 and the downstream stream passageway 24.The lower end of valve rod 1 is connected with oil engine; Driving lower valve rod 1 action at oil engine; Under the action of valve rod 1, valve disc 18 is realized cooperation closed or that open with the valve seat 19 on the valve body 5, thereby upper reaches stream passageway on the valve body 5 23 and downstream stream passageway 24 are cut off or get through.In order to guarantee the freedom of valve rod 1 action; The gap that must keep wide about 0.20～0.35mm between valve rod 1 and the sleeve 2; This gap makes and forms an annular space 26 between valve rod 1 and the sleeve 2, and the valve rod 1 in the annular space 26 is positioned near the inner place of sleeve 2 pilot holes and is provided with sealing cone 15, and the sealing conical surface 15 is the 45o conical surface; Built-up welding has stellite on the sealing cone 15, so that increase the wear resistance of sealing cone 15; Also be provided with sealing cone on the stuffing box gland 28 of sleeve 2, the sealing cone on the stuffing box gland 28 should be suitable with the sealing cone 15 on the valve rod 1; When valve disc 18 and valve seat 19 were opened, valve rod 1 was realized sealing through sealing cone 15 and stuffing box gland 28, and does spacing through the aperture of 15 pairs of valve discs of sealing cone 18 and valve seat 19.When valve disc 18 on valve seat 19 during standard-sized sheet; The normal contact seal of sealing cone on valve rod 1 and the stuffing box gland 28, the leakage rate of steam annular space 26 in is zero, when valve disc 18 on valve seat 19 not during standard-sized sheet; Normally contact seal of sealing cone on valve rod 1 and the stuffing box gland 28; Steam has certain leakage rate in annular space 26, in order to reduce leakage, be set with lining on the valve rod 1 in the annular space 26; Simultaneously; 26 leak the entering machine room for fear of steam from annular space; On valve body 5, be provided with first steam bleeder connection 25 that communicates with annular space 26; This steam bleeder connection is connected on the gland steam heater, and first steam bleeder connection 25 is introduced in the gland steam heater as leaking the steam that gets in the annular space 26.
Sealing cone 15 angles of above-mentioned valve rod 1 can also be other angle except selecting 45o for use, if select other angle for use, the difficulty of processing of valve rod 1 and sleeve 2 has certain increase.
Above-mentioned stuffing box gland 28 also can need not to be provided with sealing cone, can reach sealing effect equally, but sealing effect is relatively poor.
The number of fragments of above-mentioned positioning ring 10 is not a particular value, except selecting four segmental arcs, can be other quantity, and for example three segmental arcs, five segmental arcs, six segmental arcs etc. mainly are to consider from the angle of ease of assembly.
Claims (9)
1. Steam Turbine's Main Vaper Valve door comprises:
-valve body (5); Said valve body (5) is provided with upper reaches stream passageway (23), downstream stream passageway (24), valve rod pilot hole and valve gap pilot hole; Be fixed with valve seat (19) on the valve body (5) between upper reaches stream passageway (23) and the downstream stream passageway (24); Be equipped with sleeve (2) through limited step (6) and pressing plate (3) on the valve rod pilot hole, be respectively equipped with the pilot hole that valve rod (1) is led on pressing plate (3) and the sleeve (2);
-valve gap, said valve bonnet seal are assemblied on the valve gap pilot hole of valve body (5);
-valve rod (1); The upper end of said valve rod (1) is passed pressing plate (3) and is connected valve disc (18) with pilot hole on the sleeve (2); Has annular space (26) between valve rod (1) and the sleeve (2); This annular space (26) communicates with first steam bleeder connection (25) on being connected valve body (5); Under the action of valve rod (1), the valve seat (19) on valve disc (18) and the valve body (5) cooperates, and upper reaches stream passageway (23) on the valve body (5) and downstream stream passageway (24) are cut off or get through; It is characterized in that; The inner place of the pilot hole of said sleeve (2) is provided with stuffing box gland (28); Said valve rod (1) is provided with sealing cone (15) near the inner place of sleeve (2) pilot hole; When valve disc (18) and valve seat (19) when opening, valve rod (1) is realized sealing through sealing cone (15) and the stuffing box gland (28) on the sleeve (2), and does spacing through sealing cone (15) to the aperture of valve disc (18) and valve seat (19).
2. according to the said Steam Turbine's Main Vaper Valve door of claim 1; It is characterized in that; Said valve gap is mainly by being assemblied in interior valve gap (7) in the valve gap pilot hole, elastic seal ring (8), hold-down ring (9), positioning ring (10) from top to bottom successively and constituting through the outer valve gap (12) that fixing bolt (14) is fixed on valve gap pilot hole outer end; Interior valve gap (7) is connected through second turnbuckle (13) with outer valve gap (12); The periphery of positioning ring (10) is embedded on the locating slot in the valve gap pilot hole, the end face that is pressed in hold-down ring (9) interior week of positioning ring (10).
3. according to the said Steam Turbine's Main Vaper Valve door of claim 2, it is characterized in that said interior valve gap (7) and hold-down ring (9) are respectively with the conical surface and elastic seal ring (8) butt.
4. according to claim 2 or 3 said Steam Turbine's Main Vaper Valve doors, it is characterized in that have elastic groove on the outer circumferential face of said elastic seal ring (8), the sealing surface of elastic seal ring (8) has some double wedges.
5. according to the said Steam Turbine's Main Vaper Valve door of claim 2, it is characterized in that said positioning ring (10) is a segmental structure, is made up of at least two segmental arcs.
6. according to the said Steam Turbine's Main Vaper Valve door of claim 2, it is characterized in that the bottom surface of said interior valve gap (7) has the hollow protecting jacket (16) with the corresponding coupling of valve disc (18), protecting jacket (16) is provided with a plurality of steam through holes (17).
7. according to the said Steam Turbine's Main Vaper Valve door of claim 2, it is characterized in that, be connected with on the said outer valve gap (12) with the valve gap pilot hole in second steam bleeder connection (27) that communicates of space.
8. according to the said Steam Turbine's Main Vaper Valve door of claim 1, it is characterized in that the sealing cone (15) on the said valve rod (1) is the 45o conical surface, sealing cone (15) is gone up built-up welding has stellite.
9. according to the said Steam Turbine's Main Vaper Valve door of claim 1, it is characterized in that having the sealing cone that is matched with the last sealing cone (15) of valve rod (1) on the said stuffing box gland (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210235740.4A CN102787871B (en) | 2012-07-10 | 2012-07-10 | Main steam valve of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210235740.4A CN102787871B (en) | 2012-07-10 | 2012-07-10 | Main steam valve of steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN102787871A true CN102787871A (en) | 2012-11-21 |
| CN102787871B CN102787871B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210235740.4A Active CN102787871B (en) | 2012-07-10 | 2012-07-10 | Main steam valve of steam turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN102787871B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958466A (en) * | 2017-05-18 | 2017-07-18 | 山东青能动力股份有限公司 | Multistage steam Flow-rate adjustment speed shutting mechanism and steam turbine |
| CN108799620A (en) * | 2018-06-29 | 2018-11-13 | 东方电气集团东方汽轮机有限公司 | A kind of valve casing cooling system |
| CN108799536A (en) * | 2018-08-16 | 2018-11-13 | 中国船舶重工集团公司第七0四研究所 | Main inlet throttle-stop valve stem structure |
| CN110193681A (en) * | 2018-02-27 | 2019-09-03 | 上海电气电站设备有限公司 | A kind of steam turbine valve is interior to seal overlay cladding and its structure |
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| GB783101A (en) * | 1954-11-12 | 1957-09-18 | British Thomson Houston Co Ltd | Improvements relating to steam valves |
| US4114652A (en) * | 1975-04-30 | 1978-09-19 | Bbc Brown Boveri & Company Limited | Combined stop and control valve |
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| JPH11343811A (en) * | 1998-06-03 | 1999-12-14 | Toshiba Corp | Steam turbine plant, main steam stop valve and reheat steam stop valve |
| CN1804127A (en) * | 2005-12-14 | 2006-07-19 | 东方汽轮机厂 | Steam turbine valve manifold stellite alloy plasma spray welding method and equipment |
| CN200949478Y (en) * | 2006-08-04 | 2007-09-19 | 上海汽轮机有限公司 | Double layer valve cap of steam turbine main steam intake valve |
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| GB783101A (en) * | 1954-11-12 | 1957-09-18 | British Thomson Houston Co Ltd | Improvements relating to steam valves |
| US4114652A (en) * | 1975-04-30 | 1978-09-19 | Bbc Brown Boveri & Company Limited | Combined stop and control valve |
| GB2247736A (en) * | 1990-07-25 | 1992-03-11 | Gec Alsthom Ltd | Steam turbine control valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958466A (en) * | 2017-05-18 | 2017-07-18 | 山东青能动力股份有限公司 | Multistage steam Flow-rate adjustment speed shutting mechanism and steam turbine |
| CN106958466B (en) * | 2017-05-18 | 2018-07-17 | 山东青能动力股份有限公司 | Multistage steam flow-rate adjustment speed shutting mechanism and steam turbine |
| CN110193681A (en) * | 2018-02-27 | 2019-09-03 | 上海电气电站设备有限公司 | A kind of steam turbine valve is interior to seal overlay cladding and its structure |
| CN108799620A (en) * | 2018-06-29 | 2018-11-13 | 东方电气集团东方汽轮机有限公司 | A kind of valve casing cooling system |
| CN108799620B (en) * | 2018-06-29 | 2019-07-19 | 东方电气集团东方汽轮机有限公司 | A kind of valve casing cooling system |
| CN108799536A (en) * | 2018-08-16 | 2018-11-13 | 中国船舶重工集团公司第七0四研究所 | Main inlet throttle-stop valve stem structure |
| CN108799536B (en) * | 2018-08-16 | 2024-06-04 | 中国船舶重工集团公司第七0四研究所 | Main valve stem structure |
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| Publication number | Publication date |
|---|---|
| CN102787871B (en) | 2014-12-10 |
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