CN202467939U - Extracted steam stripping plate-type regulating valve of steam turbine - Google Patents
Extracted steam stripping plate-type regulating valve of steam turbine Download PDFInfo
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- CN202467939U CN202467939U CN2012200558423U CN201220055842U CN202467939U CN 202467939 U CN202467939 U CN 202467939U CN 2012200558423 U CN2012200558423 U CN 2012200558423U CN 201220055842 U CN201220055842 U CN 201220055842U CN 202467939 U CN202467939 U CN 202467939U
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Abstract
The utility model discloses an extracted steam stripping plate-type regulating valve of a steam turbine. The extracted steam stripping plate-type regulating valve of the steam turbine comprises a steam cylinder, a valve rod and a lifting device, wherein the steam cylinder is provided with a steam inlet; the bottom part of the steam cylinder is provided with steam outlets; the valve rod extends into the steam cylinder; the upper end of the valve rod is connected with the lifting device; a plurality of steam outlets are arranged; a valve beam vertically moving is also arranged in the steam cylinder; the lower end of the valve rod is connected onto the valve beam; a valve structure is arranged between the valve beam and each steam outlet; each valve structure comprises a valve seat, a bushing hole, a bushing, a valve setting bolt and a valve setting, wherein the valve seat is arranged on the corresponding steam outlet; the bushing hole is arranged on the valve beam; the bushing is located in the corresponding bushing hole; the valve setting is matched with the valve seat; the valve setting bolt passes through the corresponding bushing, and the upper part of the valve setting bolt is located in the corresponding bushing hole, and the lower part of the valve setting bolt is connected with the corresponding valve setting; when the valve structures are closed, bolt heads at the upper parts of the valve setting bolts deviate from the bushings for a distance D; and in all the valve structures, the distances D are unequal. The regulating valve has the advantages that the valve rod is not easy to rupture; the operation is safer; and a regulating effect is better when opening is large.
Description
Technical field
The utility model relates to a kind of modulating valve of steam turbine, and especially a kind of extracted steam from turbine is carried board-like modulating valve.
Background technique
As shown in Figure 1; What existing reaction turbine low pressure extraction valve adopted is the pipe type modulating valve of throttling single valve seat, and this regulative mode has simple in structure, and cost is low; Installation and maintenance are advantage easily, is not with the obvious advantage under the very big situation in steam turbine power, the quantitative changeization of drawing gas.But at steam turbine power, when the amount of drawing gas alters a great deal, its structural defective just clearly:
1, when the maximum amount of drawing gas of design and the minimum amount of drawing gas all satisfy the power requirements to steam turbine, because the flow difference that these two kinds of situation flow through low pressure extraction valve is very big, therefore; When the amount of drawing gas was big, like the asynchronous increase of the power of steam turbine, the steam flow that then flows through low pressure extraction valve will reduce a lot; And require low pressure to regulate the very little requirement of satisfying the steam flow field of steam valve aperture; Produce very big restriction loss, thereby reduced turbine efficiency, increased hear rate.This type modulating valve regulating effect when big aperture is bigger; General valve 60% aperture is to valve wide open, and regulating effect is very not obvious, especially power generation turbine; The turbine efficiency of when variable parameter operation, regulating than employing low pressure nozzle of the same type is much lower, has lost market competition advantage.
2, the fatal shortcoming of this type pipeline valve is when small flow moves, and can produce the steam flow disorder, causes the valve disc vibration; Thereby cause the valve rod vibration; Cause valve stem crack when serious, cause the vibration of valve when serious again, cause the leakage of oil of oil engine hydraulic fluid port, oil spout; Cause oil to catch fire, can not satisfy steam turbine safe operation requirement.
Summary of the invention
The purpose of the utility model is that a kind of extracted steam from turbine that designs for the deficiency that solves above-mentioned technology is carried board-like modulating valve, and this regulating valve rod is easy-rupturing not, moves saferly, and regulating effect is better when big aperture.
The extracted steam from turbine that the utility model designed is carried board-like modulating valve; Comprise cylinder, valve rod and lifting device, on cylinder, be provided with a steam inlet, the cylinder bottom is provided with steam ouput; Valve rod stretches into cylinder internal and the upper end is connected with lifting device, and said steam ouput is a plurality of; In cylinder, also be provided with the valve beam that moves up and down, said valve rod lower end is connected on this valve beam; Be provided with valve arrangement between said valve beam and each steam ouput; Described valve arrangement comprises the valve seat that is arranged on the steam ouput, the valve setting that is arranged on the bush hole on the valve beam, the lining that is positioned at bush hole, valve setting bolt and cooperates with valve seat; Described valve setting bolt passes lining and its top is positioned at bush hole, the bottom connects valve setting; Valve setting bolt upper bolt head and the lining D that stands away is unequal in the distance B described in each valve arrangement when valve arrangement is closed.
As preferably:
Described steam ouput is five, and the steam ouput bore that is positioned at the neutral position is maximum, and with the valve arrangement that this steam ouput cooperates, its distance B is also maximum;
Described valve rod comprises first valve rod and second valve rod; Described lifting device comprises oil engine, first lever, second lever, first connecting plate, second connecting plate, carriage and strut; Carriage is fixed on the cylinder; Said oil engine is arranged on the cylinder through carriage; The piston rod upper end of this oil engine is hinged with first lever, one end; This first lever the other end and second lever end are hinged, the said second lever the other end and strut upper articulation, and said strut bottom is fixed on the cylinder; Said carriage upper end is hinged as the strong point and said first lever; Described first connecting plate upper end is hinged with first lever, lower end and first valve rod are hinged; Described second connecting plate upper end is hinged with second lever, lower end and second valve rod are hinged;
Said cylinder is provided with valve gap, and valve rod passes this valve gap; All be provided with upper spring seat on described first connecting plate and second connecting plate, upper spring seat is fixed on the cylinder through screw rod, all is provided with holddown spring at upper spring seat and valve gap;
Be provided with gland nut or gland, Expanded graphite seal ring and pilot sleeve from top to bottom successively on the passage that said valve gap is interior with valve rod cooperates, also be provided with a leakage steam pipe road that valve stem leakoff is drawn on this valve gap;
Described valve setting comprises taper valve setting and spherical valve setting;
The extracted steam from turbine that the utility model designed is carried board-like modulating valve, state of rest, and valve disc is taken a seat and is pressed on the valve seat; During Open valve, lifting device action valve rod rises, along with the valve beam is promoted by valve rod gradually; Bolt head at the valve disc bolt contacts with lining; Thereby the bolted valve disc lifting of this valve disc is disseated, by the valve disc bolt valve disc is suspended on the valve beam, the steam ouput that this valve disc is corresponding so just is on state; Because the distance B that valve setting bolt upper bolt head and lining leave in each valve arrangement is unequal; Therefore each valve setting is raised at the different time point; The conducting one by one of each steam ouput; Even when big aperture, modulating valve also can be because of making regulating effect obvious in new steam ouput conducting like this; This modulating valve, the quantity of steam ouput and valve arrangement is many more, and degree of regulation is high more;
On the other hand; The vibration of valve setting mainly exerts an influence to the valve setting screw rod when small flow, because the distance of valve setting screw rod is significantly smaller than the valve rod distance of existing single valve seat, therefore is not easy fracture; In addition; Can make loose fit between the valve setting screw and bushing, make the valve setting screw rod can produce the small vibration that is used to offset valve setting of rocking, safer during use.
Description of drawings
Fig. 1 is the schematic representation of existing single-seat valve;
Fig. 2 is that embodiment's 1 extracted steam from turbine is carried board-like modulating valve structural representation;
Fig. 3 is the enlarged view at A place among Fig. 2;
Fig. 4 is the plan view that embodiment's 1 extracted steam from turbine is carried board-like modulating valve;
Fig. 5 is the schematic representation of valve gap;
Among the figure: cylinder 1; Lifting device 2; Steam inlet 3; Steam ouput 4; Valve beam 5; Valve arrangement 6; Valve seat 7; Bush hole 8; Lining 9; Valve setting bolt 10; Valve setting 11; Bolt head 12; First valve rod 13; Second valve rod 14; Oil engine 15; First lever 16; Second lever 17; First connecting plate 18; Second connecting plate 19; Carriage 20; Strut 21; Piston rod 22; Valve gap 23; Spring seat 24; Screw rod 25; Holddown spring 26; Gland 27; Expanded graphite seal ring 28; Pilot sleeve 29; Leak steam pipe road 30.
Embodiment
Combine accompanying drawing that the utility model is done further to describe through embodiment below.
Embodiment 1:
Like Fig. 2,3, shown in 4; The described extracted steam from turbine of present embodiment is carried board-like modulating valve; Comprise cylinder 1, valve rod and lifting device 2, on cylinder 1, be provided with a steam inlet 3, cylinder 1 bottom is provided with steam ouput 4; Valve rod stretches into cylinder 1 inside and the upper end is connected with lifting device 2, and steam ouput 4 is a plurality of; In cylinder 1, also be provided with the valve beam 5 that moves up and down, the valve rod lower end is connected on this valve beam 5, and the inverted T-shaped tenon can be processed in the lower end of valve rod, and tenon can pass valve beam 5 back half-twists valve beam 5 is blocked, and valve beam 5 is hung; Be provided with valve arrangement 6 between valve beam 5 and each steam ouput 4; Valve arrangement 6 comprises the valve seat 7 that is arranged on the steam ouput 4, the valve setting 11 that is arranged on the bush hole 8 on the valve beam 5, the lining 9 that is positioned at bush hole 8, valve setting bolt 10 and cooperates with valve seat 7; Valve setting bolt 10 passes lining 9 and its top is positioned at bush hole 8, the bottom connects valve setting 11; The taper pin positioning and lockings are used in valve setting bolt 10 valve disc 11 backs of can clamp load torque on request packing into; Also flangable is towards riveting in the pin-and-hole end, and valve setting bolt 10 upper bolt heads 12 and lining 9 D that stands away is unequal at each valve arrangement 6 middle distance D when valve arrangement 6 is closed.Wherein, steam ouput 4 is five, and steam ouput 4 bores that are positioned at the neutral position are maximum, and with the valve arrangement 6 that this steam ouput 4 cooperates, its distance B is also maximum; Valve rod comprises first valve rod 13 and second valve rod 14; Lifting device 2 comprises oil engine 15, first lever 16, second lever 17, first connecting plate 18, second connecting plate 19, carriage 20 and strut 21; Carriage 20 is fixed on the cylinder 1; Oil engine 15 is arranged on the cylinder 1 through carriage 20, and available joint shaft bearing and bearing pin are hinged between oil engine 15 and the carriage 20, and making oil engine 15 can be that slightly swing at the center with the bearing pin when operation; Piston rod 22 upper ends and first lever, 16 1 ends of this oil engine 15 are hinged; These first lever, 16 the other ends and second lever, 17 ends are hinged, second lever, 17 the other ends and strut 21 upper articulations, and strut 21 bottoms are fixed on the cylinder 1; Carriage 20 upper ends are hinged as the strong point and first lever 16; First connecting plate, 18 upper ends and first lever are 16 hinged, lower end and first valve rod 13 are hinged; Second connecting plate, 19 upper ends and second lever are 17 hinged, lower end and second valve rod 14 are hinged; Cylinder 1 is provided with valve gap 23, and valve rod passes this valve gap 23; All be provided with upper spring seat 24 on first connecting plate 18 and second connecting plate 19; Upper spring seat 24 is fixed on the cylinder 1 through screw rod 25; All be provided with holddown spring 26 at upper spring seat 24 and valve gap 23, holddown spring 26 can also provide the enough power of closing for valve arrangement 6 simultaneously in order to the steam power that overcomes valve rod; As shown in Figure 5; Be provided with gland nut or gland 27, Expanded graphite seal ring 28 and pilot sleeve 29 from top to bottom successively in the valve gap 23 with on the passage that valve rod cooperates; The impacting force that gland nut or the gland 27 of can screwing increases Expanded graphite seal rings 28 stops, reduces valve stem leakoff, also is provided with a leakage steam pipe road 30 that valve stem leakoff is drawn on this valve gap 23; Valve setting 11 comprises taper valve setting and spherical valve setting; Generally can adopt the taper valve disc for the 1st valve of stability that improves steam turbine operation; All the other are spherical valve; The 2nd also available mitre velve of indivedual units arranged, and, can take to open in advance the measure of the 2nd valve in order to improve the force-bearing situation of unit at little load condition zone blade.
Claims (6)
1. an extracted steam from turbine is carried board-like modulating valve; Comprise cylinder, valve rod and lifting device, on cylinder, be provided with a steam inlet, the cylinder bottom is provided with steam ouput; Valve rod stretches into cylinder internal and the upper end is connected with lifting device, it is characterized in that said steam ouput is a plurality of; In cylinder, also be provided with the valve beam that moves up and down, said valve rod lower end is connected on this valve beam; Be provided with valve arrangement between said valve beam and each steam ouput; Described valve arrangement comprises the valve seat that is arranged on the steam ouput, the valve setting that is arranged on the bush hole on the valve beam, the lining that is positioned at bush hole, valve setting bolt and cooperates with valve seat; Described valve setting bolt passes lining and its top is positioned at bush hole, the bottom connects valve setting; Valve setting bolt upper bolt head and the lining D that stands away is unequal in the distance B described in each valve arrangement when valve arrangement is closed.
2. extracted steam from turbine according to claim 1 is carried board-like modulating valve, it is characterized in that described steam ouput is five, and the steam ouput bore that is positioned at the neutral position is maximum, and with the valve arrangement that this steam ouput cooperates, its distance B is also maximum.
3. extracted steam from turbine according to claim 1 and 2 is carried board-like modulating valve, it is characterized in that described valve rod comprises first valve rod and second valve rod; Described lifting device comprises oil engine, first lever, second lever, first connecting plate, second connecting plate, carriage and strut; Carriage is fixed on the cylinder; Said oil engine is arranged on the cylinder through carriage; The piston rod upper end of this oil engine is hinged with first lever, one end; This first lever the other end and second lever end are hinged, the said second lever the other end and strut upper articulation, and said strut bottom is fixed on the cylinder; Said carriage upper end is hinged as the strong point and said first lever; Described first connecting plate upper end is hinged with first lever, lower end and first valve rod are hinged; Described second connecting plate upper end is hinged with second lever, lower end and second valve rod are hinged.
4. extracted steam from turbine according to claim 3 is carried board-like modulating valve, it is characterized in that said cylinder is provided with valve gap, and valve rod passes this valve gap; All be provided with upper spring seat on described first connecting plate and second connecting plate, upper spring seat is fixed on the cylinder through screw rod, all is provided with holddown spring at upper spring seat and valve gap.
5. extracted steam from turbine according to claim 4 is carried board-like modulating valve; It is characterized in that in the said valve gap with passage that valve rod cooperates on be provided with gland nut or gland, Expanded graphite seal ring and pilot sleeve from top to bottom successively, also be provided with a leakage steam pipe road that valve stem leakoff is drawn on this valve gap.
6. extracted steam from turbine according to claim 5 is carried board-like modulating valve, it is characterized in that described valve setting comprises taper valve setting and spherical valve setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200558423U CN202467939U (en) | 2012-02-21 | 2012-02-21 | Extracted steam stripping plate-type regulating valve of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200558423U CN202467939U (en) | 2012-02-21 | 2012-02-21 | Extracted steam stripping plate-type regulating valve of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467939U true CN202467939U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200558423U Expired - Lifetime CN202467939U (en) | 2012-02-21 | 2012-02-21 | Extracted steam stripping plate-type regulating valve of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467939U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536347A (en) * | 2012-02-21 | 2012-07-04 | 杭州汽轮机股份有限公司 | Steam extraction lifting plate type adjusting valve of steam turbine |
| CN104214415A (en) * | 2014-08-31 | 2014-12-17 | 贵州电力试验研究院 | Method for soft measurement of openness signal of high pressure cylinder steam intake adjusting valve of steam turbine |
-
2012
- 2012-02-21 CN CN2012200558423U patent/CN202467939U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536347A (en) * | 2012-02-21 | 2012-07-04 | 杭州汽轮机股份有限公司 | Steam extraction lifting plate type adjusting valve of steam turbine |
| CN104214415A (en) * | 2014-08-31 | 2014-12-17 | 贵州电力试验研究院 | Method for soft measurement of openness signal of high pressure cylinder steam intake adjusting valve of steam turbine |
| CN104214415B (en) * | 2014-08-31 | 2016-09-14 | 贵州电力试验研究院 | A kind of steam turbine high-pressure cylinder enters steam control valve opening amount signal flexible measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |