CN106703902A - High-pressure valve casing assembly of supercritical and ultra-supercritical stream turbines - Google Patents
High-pressure valve casing assembly of supercritical and ultra-supercritical stream turbines Download PDFInfo
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- CN106703902A CN106703902A CN201510470896.4A CN201510470896A CN106703902A CN 106703902 A CN106703902 A CN 106703902A CN 201510470896 A CN201510470896 A CN 201510470896A CN 106703902 A CN106703902 A CN 106703902A
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Abstract
The invention provides a valve casing assembly of a stream turbine high-pressure combined valve. The valve casing assembly comprises a valve casing (10) provided with a steam inlet (110), a steam exhaust outlet (120), a valve rod mounting orifice (130) and a connection orifice (140), and a joint assembly arranged in at least one of the steam inlet (110), the steam exhaust outlet (120), the valve rod mounting orifice (130) and the connecting orifice (140), wherein the joint assembly comprises a steam inlet connecting pipe connector clip (150), a steam exhaust connecting pipe connector clip (160), a connection connecting pipe connector clip (180), a sealing valve pocket connector clip (170), wedge-type sealing rings (152, 162, 182 and 172) and a bolt pre-tightening mechanism; and the joint assemblies are connected with the valve casing (10) in a sealed mode through the bolt pre-tightening mechanism. The valve casing assembly is especially suitable for the supercritical and ultra-supercritical stream turbine high-pressure combined valves.
Description
Technical field
The valve casing of union valve is adjusted the present invention relates to steam turbine field, more particularly to the main vapour of turbine high-pressure
Component.The valve casing component is particularly suited for the main vapour regulation joint of overcritical and supercritical turbine high pressure
Valve.
Background technology
Steam turbine is the critical energy power-equipment in heat power station and nuclear power station, high pressure main stop valve,
Septum valve or the main vapour regulation union valve of high pressure are the important flow devices of power station steam turbine, are important
Energy input regulation and control device.
HTHP main steam from boiler or nuclear reactor, enter turbine expansion work done it
Before, high pressure main stop valve is first passed around, then by septum valve, according to pressure, the temperature of setting
Enter steam turbine with flow, expanded step by step in the steam flow passage that steam turbine dynamic and static impellers at different levels are constituted
Acting, is converted to rotating mechanical energy, then converted mechanical energy into by generator huge by huge heat energy
Electric energy output.
High pressure main stop valve and septum valve are located at the throat thoroughfare of HTHP main steam flow path,
Carry important function and responsibility.On the one hand, high pressure main stop valve and septum valve are in emergency episode
Under state, each there is quick closedown function, main steam blocked using double insurance measure, it is ensured that
Hypervelocity accident in steam turbine, steady, safe shutdown there is no.On the other hand, septum valve is in work
It is exhausted using what is produced in different opening degrees among opening degree during state is often in variation
Thermal throttle drag effect, the steam inlet condition of constantly regulate HTHP main steam, it is ensured that steam turbine is on demand
Realize startup, raising speed, regulating working conditions, steady running, reduction of speed or shutdown.As can be seen here, high pressure
Stop valve and septum valve are under long-term continuous high temperature high-voltage operation operating mode, it is necessary at any time in spirit
Living, intact, controllable, reliable optimum Working.
Power station steam turbine is divided by main steam condition, is generally divided into high pressure, super-pressure, subcritical, super
Critical and ultra supercritical, the power grade of steam turbine also increases successively.Current thermal power generation and nuclear power machine
Group has reached 1000MW (i.e. gigawatt) grade.The main steam pressure of supercritical turbine oneself reach
28MPa or so, temperature is up to 600 DEG C or so.Supercritical turbine is to structure, material, manufacture
The sport technique segments such as technique, propose higher standard and the request, and many technological difficulties all need effort
Overcome one by one.
High pressure main stop valve, septum valve or the main vapour regulation union valve of high pressure, are large-scale power station steam turbines
One of crucial, important corollary equipment of particularly overcritical and supercritical turbine.Existing master
Vapour and control valve configuration total arrangement, valve matching, architectural feature approximately as:
(1) separate valves.High pressure main stop valve is each independently manufactured and assembled with septum valve, and each valve exists
Installation in Plant scene is matched connection using pipeline, and pipeline is all in power plant's Site Welding.Each independence
The unitary function of valve, typically every multiple valve groups being made up of separate valves of steam turbine configuration, " a master one
Into one group, every steam turbine matches somebody with somebody four groups to tune ".Each separate valves is each equipped with a valve electricity and adjusts manipulation machine
Structure, it is man-to-man to carry out independent driving and manipulation.
(2) union valve.High pressure main stop valve shares a valve casing, the inner chamber of each valve with septum valve
Body is each independent and is connected by duct, and union valve is integrally manufactured and assembled need not arrive power plant scene again
Assembled welded pipe line.Each valve is each equipped with a valve driving machine structure, and independent drive is carried out one to one
Dynamic and manipulation, so as to for example be separately turned on or block stop valve chamber steam discharge aperture and regulation valve pocket exhaust hole
Mouthful.Share valve casing but do not share the union valve of cavity, typically " master one adjusts " or " master two adjusts "
Match somebody with somebody, every steam turbine matches somebody with somebody four or two union valves.For example, CN2782938Y discloses a kind of power station
Turbine high-pressure main steam control valve, is combined and is constituted by a high pressure main stop valve and two septum valves；
High pressure main stop valve and septum valve share a valve casing, and the chamber of valve casing is high by each independent one
Pressure stop valve chamber and two high voltage adjusting valve chamber concatenations are formed, and each chamber is connected by passage, its
In the high pressure main stop valve and two septum valves be engaged with respective valve seat in respective chamber with
The steam discharge parameter of break-make steam discharge or the respective chamber of regulation.The A of CN 103470317 similarly disclose one kind
Joint valve structure for steam turbine, including a stop valve, a main steam control valve and a filling valve, wherein.
The main steam venthole of stop valve is connected with the homophony valve air intake of main steam control valve by a main connecting tube
It is logical.In this joint valve structure for steam turbine, from main steam inlet through stop valve and main steam control valve
Vapor flow path to main venthole has been turned back 90 ° twice.
Above-mentioned oneself has two class valves in technology, is divided from hydrodynamics and aerothermodynamics angle
, there is identical shortcoming and deficiency, the i.e. steam turbine by separate valves or union valve connection high in analysis
The comprehensive pressure loss that the main steam of valve combination system is total is larger.HTHP main steam is high from entering
Pressure stop valve until outflow septum valve, flow path is long, flow direction turn back it is many, along journey flow parameter
Frequently acutely, the cumulative effect of local pressure loss substantially, weakens HTHP main steam for change
Capacity for work, influences steam turbine power generation efficiency.By taking the union valve in prior art as an example, HTHP
Main steam from entering into discharge, steam flow direction at least experience more than two to three times 90 ° turn back, flow shape
State and flow parameter can occur multiple acute variation at stop valve, regulating valve and position of respectively turning back.
Especially, the extension of such flow path and turning back causes the larger pressure loss and flow conveying
The decline of efficiency.Because the pressure of high-pressure main steam regulating valve is very high, even e.g., from about 1% pressure is damaged
Lose or 0.1% minimum flow transfer efficiency declines a large amount of losses that also result in flow, and and then make
Into the decline of turbine thermodynamic efficiency.
In addition, it is above-mentioned oneself have two class valves in technology, have their own characteristics each and also cut both ways.Separate valves knot
Structure is single, unitary function, is easy to independent design and flexible topology, and manufacturing process and assembly technology are relative
Simply, maximum problem is that each separate valves will, assembly in place at Installation in Plant scene, pipe arrangement, weldering
Connect, the welding job amount of the big wall thickness high alloy Heat-Resisting Stainless Steel Tube of Large Diameter Pipeline is multiplied than union valve.
Union valve compact conformation, the unification of two valves or the unification of three valves, Installation in Plant work on the spot amount significantly subtract
Few, the problem for existing is that integrated level is high, valve casing is thick and heavy, valve body is great, manufacturing process and assembly technology
It is relative complex.
And it is above-mentioned oneself have two class valves in technology, be analyzed from Technology of Mechanical Manufacture angle,
In the presence of class identical shortcoming and not enough, i.e., be responsible for completing by valve manufacture enterprise with valve casing welding equipment
Enter, many heat processing technique links that steam discharge connecting leg is related, the technique for greatly improving valve products is difficult
Degree, also considerably increases valve products manufacturing cycle and integrated cost.High pressure main stop valve, high voltage adjusting
Valve or the main vapour of high pressure adjust the valve casing of union valve, generally use rough forging and cast blank, blank material
The chemical composition of material is generally variant with turbine high-pressure main steam line, in order to avoid in Installation in Plant
It is heat-resisting stainless that scene carries out the high alloy that technical requirements are higher, quality standard is larger compared with tight, technology difficulty
The welding of steel dissimilar steel joint, generally in manufactory on valve casing in advance weld one section enter vapour connecting leg and
Steam discharge connecting leg, enters vapour connecting leg and steam discharge connecting leg is used and steam turbine main steam pipe material chemical composition phase
Same rough forging or pipe.The welding of dissimilar steel joint is the difficult point in welding procedure, and thick and heavy valve
Package is mouthful bigger with the big wall thickness high alloy heat-resistance stainless steel different steel weld difficulty of Large Diameter Pipeline, this exactly valve
The technology short slab and technique weakness of door manufacturing enterprise.
Two class valves in above-mentioned prior art, work is manufactured from the blank of most important basic components valve casing
Skill angle is analyzed, and also there is class identical shortcoming and not enough, i.e., the valve casing for generally using
, there is many insoluble critical technological points and hidden danger of quality in cast blank form.In prior art
Separate valves and union valve, all because the reason for its internal cavity shape and outer shape, it is impossible to using forging
Blank is made, is typically each forced to use cast blank, due to the casting manufacturability of high alloy heat-resistance stainless steel
Very poor, cast blank can only often be cast as solid state, in addition the high temperature allowable stress of cast blank
Generally smaller than rough forging, valve casing wall thickness is necessarily increased, and valve casing weight and appearance and size also accordingly increase
Plus, in the case where valve shell cavity body size is identical and material composition is similar, the wall thickness of cast blank leads to
It is often more than 1.2 times of rough forging.Because the casting manufacturability of high alloy heat-resistance stainless steel is very poor, casting
The very long complexity of technological process is made, technical difficulty is big, the inherent quality of valve casing cast blank is not easy to protect very much
Card, one and in the significant points for being difficult to repair, occurrence of large-area casting flaw, it is likely that cause valve
Shell casting is scrapped, and causes big economic loss and construction delay.In addition, not easy to operate in Non-Destructive Testing
Or the complex region that cannot be operated, easily leave inherent quality defect and be difficult to find and eliminate, it is right
In the valve products for being run under HTHP adverse circumstances for a long time, can there are safety risks unavoidably.
Be currently running oneself have a valve products, there is a lot of super-pressure, overcritical large-scale power station valve in oneself
Casting valve casing produce great crackle and trigger stopping accident.
Accordingly, it is desirable to be able to provide a kind of new valve casing component, the flowing ginseng that it can provide stabilization
Number, and with safe and reliable structure and less expensive manufacturing cost.
The content of the invention
In this regard, a kind of can at least overcome some above-mentioned prior art shortcomings present invention aim at providing
The main vapour of turbine high-pressure adjust the valve casing component of union valve.
Parts another object of the present invention is to provide valve casing component are prepared and assemble method.
In a scheme of the invention, there is provided a kind of main vapour of turbine high-pressure adjusts the valve casing of union valve
Component, including：Valve casing, with admission opening mouth, steam discharge aperture, valve rod mounting hole and contact hole
Mouthful；Be arranged on the admission opening mouth, steam discharge aperture, valve rod mounting hole and contact aperture at least
Adapter assembly in one, wherein the adapter assembly connects by tools for bolts ' pretension with valve casing sealing.This
The valve casing component of invention due to eliminating many heat processing technique links, especially highly difficult dissimilar steel
Welding, has significant advantage compared to the welded type valve casing of prior art.
According to a preferred embodiment, the adapter assembly includes stretching into the connecting leg or valve in the valve casing
Cover plug connector, the seal between valve casing and plug connector and for grafting described in relative valve casing pretension
Part is with the tools for bolts ' pretension mechanism to seal applying seal preload.
According to a preferred embodiment, the tools for bolts ' pretension mechanism includes connecting holding out against for the plug connector
Flange and hold out against the puller bolt that flange is threadedly coupled with this.
According to a preferred embodiment, the tools for bolts ' pretension mechanism includes the tension gland on placement valve casing
And the turnbuckle being threadedly coupled with the plug connector.
According to a preferred embodiment, the seal is wedge shape sealing ring；It is provided with described connecing
The aperture of head assembly is the shoulder hole with major diameter portion and minor diameter, the grafting of the adapter assembly
Part includes being matched with first integral part in the major diameter portion, is matched with the second of the minor diameter
Integral part and the tapered ramp towards the wedge shape sealing ring；Wherein tools for bolts ' pretension mechanism is attached to institute
State plug connector and be configured to plug connector described in relatively small diameter portion pretension and apply close with to the wedge shape sealing ring
Envelope pretightning force.
According to a preferred embodiment, the seal is wedge shape sealing ring；It is provided with described connecing
The aperture of head assembly is provided with collar stop and accommodates the annular tank of the collar stop, the joint group
The plug connector of part includes that being matched with first integral part in the aperture, radial dimension is less than described first
Second integral part and the tapered ramp towards the wedge shape sealing ring of integral part；Wherein bolt is pre-
Tight mechanism is attached to the plug connector and is configured to plug connector described in opposed annular block pretension with should to this
Wedge shape sealing ring applies seal preload.
According to a preferred embodiment, it is admission opening mouthful and/or row to be provided with the aperture of the adapter assembly
Steam vent mouthful.
According to a preferred embodiment, be provided with the aperture of the adapter assembly for valve rod mounting hole and/
Or contact aperture.
According to a preferred embodiment, the collar stop is put together by polylith annular section, so as to
In assembling and being accommodated in the annular tank.
According to a preferred embodiment, the wedge shape sealing ring has 25 ° -35 ° of the sealing angle of wedge.
According to a preferred embodiment, in admission opening mouth, steam discharge aperture, valve rod mounting hole and contact
It is provided with the aperture of adapter assembly in aperture, is provided with the leakage vapour outside the sealing area of the seal
Passage.
According to another program of the present invention, there is provided a kind of main vapour regulation union valve of turbine high-pressure, including master
Steam valve mechanism, regulation valve system and according to valve casing component of the present invention, wherein the stop valve machine
Structure and/or regulation valve system are constructed to be permeable to open or end the steam discharge aperture independently of one another.
According to a preferred embodiment, the main vapour regulation union valve of the high pressure is overcritical and ultra supercritical vapour
The main vapour regulation union valve of high pressure of turbine.
According to another program of the present invention, there is provided one kind prepares and assemble the main vapour regulation joint of turbine high-pressure
The method of the valve casing component of valve, including：
Valve casing with admission opening mouth, steam discharge aperture, valve rod mounting hole and contact aperture is provided, its
The admission opening mouthful of middle valve casing and steam discharge aperture include the shoulder hole with major diameter portion and minor diameter,
The valve rod mounting hole of valve casing and contact aperture are equipped with collar stop and accommodate the ring of the collar stop
Describe groove；
To have and be matched with first integral part in admission opening mouthful major diameter portion and be matched with admission opening mouthful
The vapour connecting leg plug connector that enters of the second integral part of minor diameter enters vapour through described in the insertion of the contact aperture
Aperture, will enter steam packing sealing be clamped in it is described enter between vapour connecting leg plug connector and admission opening mouthful；
To enter vapour threaded pre-tightening mechanism be attached into vapour connecting leg plug connector with by this enter vapour connecting leg plug connector and
This enters steam packing sealing pretension and is attached to the admission opening mouthful；
Inserting into after vapour connecting leg plug connector, insertion is got in touch with connecting leg plug connector and will get in touch with the ring in aperture
Shape block is positioned in annular tank, will contact seal be clamped in it is described contact connecting leg plug connector and
Get in touch between the collar stop in aperture；
Will contact threaded pre-tightening mechanism be attached to contact connecting leg plug connector with by the contact connecting leg plug connector and
The contact seal pretension is attached to the contact aperture；
To have and be matched with first integral part in steam discharge aperture major diameter portion and be matched with steam discharge aperture
The steam discharge connecting leg plug connector of the second integral part of minor diameter is described from valve rod mounting hole insertion
Steam discharge aperture, steam discharge seal is clamped between the steam discharge connecting leg plug connector and steam discharge aperture；
Steam discharge threaded pre-tightening mechanism is attached to steam discharge connecting leg plug connector with by the steam discharge connecting leg plug connector and
The steam discharge seal pretension is attached to the steam discharge aperture；
After steam discharge connecting leg plug connector is inserted, insertion sealing valve set plug connector and by valve rod mounting hole
Collar stop be positioned in annular tank, valve pocket seal is clamped in sealing valve set grafting
Between the collar stop of part and valve rod mounting hole；
By valve pocket threaded pre-tightening mechanism be attached to sealing valve set plug connector with by the sealing valve set plug connector and
The valve pocket seal pretension is attached to the valve rod mounting hole.
A part for other features and advantages of the present invention would is that those skilled in the art are reading this Shen
Please obvious afterwards, another part will be described in conjunction with the accompanying in specific embodiment below.
Brief description of the drawings
Illustrate the description present invention now with reference to accompanying drawing, wherein：
Fig. 1 adjusts a reality of union valve with the main vapour of cutaway perspective form turbine high-pressure of the invention
Apply example；
Fig. 2 shows the partial enlarged drawing of the a-quadrant in Fig. 1；
Fig. 3 shows the partial enlarged drawing in the B regions in Fig. 1；
Fig. 4 shows the partial enlarged drawing in the C regions in Fig. 1；
Fig. 5 shows the partial enlarged drawing in the D regions in Fig. 1.
In the present specification and drawings, same or analogous reference represents same or similar
Element.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now compare attached
Figure explanation specific embodiment of the invention.Although it is in order to some realities of the invention are presented to provide accompanying drawing
Mode is applied, but accompanying drawing need not be drawn by the size of specific embodiment, and some features can be put
Greatly, remove or cutting is more preferably to show and explain the disclosure.Occur in the description
Phrase " in the accompanying drawings " or similar term need not refer to all accompanying drawings or example.
Be used in the description describe accompanying drawing some directional terminologies, for example " on ", D score,
"left", "right", " upward ", " downward " and other directional terminologies, it will accordingly be understood that be normal with its
Implication and criticize and often see those directions involved during respective drawings, this should not be construed as to appended power
The concrete restriction of the technical scheme that profit is required.
Term " about " or " substantially " in the present invention will be understood by those of ordinary skill in the art and will
Context according to the term is used changes within the specific limits.If the scope does not know, then it represents that
Changed ± 15%, more preferably in the range of ± 10%.
Term " low pressure " herein, " middle pressure ", " high pressure ", " super-pressure ", " subcritical ", " super
It is critical " and " ultra supercritical " in the pressure limit that is referred to be the latter higher than the former, and they have ability
The usual implication in domain, especially steam turbine field, and can be understood and real by those skilled in the art
Apply.Correspondingly, " high-pressure turbine ", " superhigh pressure turbine ", " subcritical pressure turbine ", " overcritical
Steam turbine " and " supercritical turbine " have the usual implication in steam turbine field, and can be this area
Technical staff understands and implements.In addition, " high pressure " and " middle pressure " (or " mesolow ") has herein
When refer also to the different sections of steam turbine, the blade of such as steam turbine high-pressure cylinder and its correlation, pipe or valve
Blade, pipe or valve system of (mesolow) cylinder and its correlation etc. are pressed in mechanism etc., steam turbine.Especially
It is, except no special is indicated, " high pressure main stop valve ", " septum valve ", " the main vapour of high pressure herein
Regulating valve ", " the main vapour regulation union valve of high pressure " are to refer to this valve machine being associated with steam turbine high-pressure cylinder
Structure.
Below in conjunction with Description of Drawings specific embodiment of the invention.
The main vapour regulation union valve of high pressure
Referring now to Fig. 1, show of the invention for overcritical and supercritical turbine high pressure master
Vapour adjusts one embodiment of union valve 1.Although in the main vapour regulation connection of the high pressure of shown embodiment
Closing valve is used for overcritical and supercritical turbine, but is contemplated that the main vapour of high pressure of the invention is adjusted
Section union valve can be used to be used as high-pressure main steam regulating valve in other types of steam turbine, including but not
It is limited to " high-pressure turbine ", " superhigh pressure turbine ", " subcritical pressure turbine " etc..In another embodiment
In, valve of the invention can also be correspondingly used as other steam turbine valves, be used for example as vapour
The main vapour regulation union valve of middle pressure of turbine.In another embodiment, valve of the invention can phase
Answering ground is used to need to provide to block the application scenario difunctional with Flow-rate adjustment, such as conduct cut-off and tune
Section combination valve.
With continued reference to Fig. 1, the main vapour regulation union valve 1 of the high pressure generally includes valve casing 10, stop valve machine
Regulation valve system 30 that structure 20 and the stop valve mechanism 20 are coaxially disposed, for manipulating the main vapour
The stop valve drive mechanism 40 of valve system 20 and the regulating valve drive for manipulating the regulation valve system 30
Motivation structure 50.By means of the stop valve drive mechanism 40, stop valve mechanism 20 can be selectively opened
Or end the steam discharge aperture 120.By means of the regulation valve activator 50, the regulation valve system 30
Can be selectively opened independently of the stop valve mechanism 20 or end the steam discharge aperture 120, and
The regulation valve system can also adjust the fluid flow parameters for flowing through the steam discharge aperture 120, for example, adjust
The parameters such as flow G, pressure P, the temperature T of steam, to meet the service requirement of steam turbine.Main vapour
The further detail below of valve system 20 and regulation valve system 30 will be explained below.
The valve casing 10 is, for example, the single piece for casting or forging, as detailed below.The valve casing 10 can have
There are admission opening mouthful 110, steam discharge aperture 120 and valve rod mounting hole 130.In an illustrated embodiment,
The valve casing 10 can also have contact aperture 140.It is envisioned that the valve casing in contact aperture is not set, this
Also fall into the range of invention.As an example, now admission opening mouthful 110 can be by the bolt of tension
Pre-tightening apparatus install the adapter assembly of welding or using any suitable other connecting leg means.Institute
In the embodiment shown, the valve casing 10 limits an inner chamber Q, inner chamber Q it is upper and lower, left,
The right side respectively limits a shoulder hole, with for example formed above-mentioned admission opening mouthful 110, steam discharge aperture 120,
Valve rod mounting hole 130 and contact aperture 140.In an illustrated embodiment, the admission opening mouthful 110
It is oppositely arranged with the contact aperture 140, the steam discharge aperture 120 and the valve rod mounting hole 130
It is oppositely arranged.The admission opening mouthful 110 can be approximately perpendicular to the steam discharge aperture 120 and set.It is shown
Valve rod mounting hole 130 can also be approximately perpendicular to admission opening mouthful 110 and contact aperture 140 is set.
As shown in Figure l, for example vapour direction 101 from left side is entered on the HTHP main steam from boiler, edge
Admission opening mouthfuls 110 enter the inner chamber Q of valve casing 10, and when the union valve 1 is in opening,
The union valve 1 is left to enter downstream unit from steam discharge aperture 120 along steam discharge direction 102, for example directly
Connect the high pressure cylinder (not shown) for flowing into steam turbine.In an illustrated embodiment, steam in the valve only
Need to turn back one time 90 °.
As shown in figure 1, in the admission opening mouthful 110, steam discharge aperture 120, valve rod mounting hole 130
The adapter assembly that is sealed by means of tools for bolts ' pretension and connected is provided with contact aperture 140, it is as follows
Text is described in detail.
As shown in figure 1, valve seat 14 also can be set at steam discharge aperture 120, for stop valve mechanism 20
Taken a seat with regulation valve system 30.With reference to Fig. 1 and Fig. 4 is referred to, valve seat 14 is limited and the stop valve
The first annular cooperation contact line M of the contact of dish 2201And the second ring contacted with the adjusting valve disc 320
Shape coordinates contact line M2.The second annular engagement contact line M2Positioned at described first annular with splice grafting
Touch line M1Downstream.In order to strengthen the shock resistance of main vapour regulation union valve, bite-resistant, Anti-erosion and anti-
Oxidability and the tightness for remaining turned-off for a long time, can strengthen coordinating contact line using suitable means
M1、M2Position or whole valve seat.For example can be in contact line M1、M2Position or whole valve seat table
The equal pile-up welding hard alloy in face, preferably stellite (cobalt chromium tungsten hard alloy).
As shown in figure 1, the main vapour regulation union valve 1 of the high pressure may also include compression and be arranged on the valve rod
Bonnet 12 in mounting hole 130.In an illustrated embodiment, the bonnet 12 supports the stop valve
Drive mechanism 40 and the regulation valve activator 50.
Valve system
Stop valve mechanism 20 according to embodiments of the present invention and regulation valve system are described with reference to Fig. 1 and Fig. 4
30.The stop valve mechanism 20 may include to stretch into the master in valve casing 10 through the valve rod mounting hole 130
Steam valve stem 210 and the stop valve dish 220 on the end of the stop valve bar 210.Such as Fig. 1 institutes
Show, the stop valve bar 210 and the stop valve dish 220 are configured to hollow tubular, and by means of
Stop valve drive mechanism 40 can axially move, for example be moved along axial line 90 in an illustrated embodiment
It is dynamic, to open or end steam discharge aperture 120.The stop valve bar 210 and stop valve dish 220 can pass through
The connector (sign) of tubular is connected.
The regulation valve system 30 may include to stretch into the tune in valve casing 10 through the valve rod mounting hole 130
Section valve rod 310 and the adjusting valve disc on the end of the regulating valve stem 310 320.The regulation
Valve rod 310 and the adjusting valve disc 320 are coaxially disposed within the stop valve bar 210 and stop valve dish
In 220, so that the regulating valve stem 310 and the adjusting valve disc 320 can be by means of regulation valve activators
50 relatively described stop valve bars 210 and stop valve dish 220 are moved axially, for example moved along axial line 90
It is dynamic, so that the same steam discharge aperture 120 can be opened or be ended to the regulation valve system 30.Additionally, should
Regulation valve system 30 can also provide steam regulatory function.The regulating valve stem 310 and adjusting valve disc 320
Can be connected to each other by one or more connectors (sign).As shown in Figure 1 and Figure 4, should
Adjusting valve disc 320 can be in tapered taper, but be contemplated that it can also be in other shapes.
Because stop valve mechanism 20 and regulation valve system 30 are respectively by stop valve drive mechanism 40 and regulation
Valve activator 50 drives, so that the stop valve mechanism 20 and regulation valve system 30 can be relative to those
This is independently axially moved.Therefore, stop valve dish 220 is transported with the open and close of adjusting valve disc 320
It is dynamic, it is each independent, it is independent of each other, as long as there is one to be not turned among the two has, main steam is nothing
Method passes through, as long as there is a closing among the two, main steam is to be cut off, and is stopped when the two receives accident
When machine instruction and quick closedown simultaneously, duplicate protection can be provided for steam turbine, prevent hypervelocity accident.Separately
On the one hand, when stop valve dish 220 is in an open position, adjusting valve disc 320 can be in stop valve dish
Adjusted in the range of 220 opening, with maximum adjusting position (the i.e. open position of stop valve dish 220
Put) and minimum adjusting position (i.e. the rest position of adjusting valve disc) between it is adjustable.Example
Such as, the adjusting valve disc 320 can make lasting trace movement in above-mentioned adjustable range, to keep
A certain or some flow parameters balances.
In an illustrated embodiment, guiding stop valve mechanism 20, especially stop valve dish 220 are additionally provided with
The valve disc pilot sleeve 70 being axially moveable.Preferably, the valve disc pilot sleeve 70 can have towards row
120 tapered sizes of steam vent mouthful.
As supplement or replacement, can also shape between stop valve mechanism 20 and regulation valve system 30
Into corresponding guide structure.For example, in an illustrated embodiment, the stop valve bar 210 of tubular can be with
Internal diameter with the regulating valve stem 310 for being matched with column.Additionally or alternatively, in shown implementation
In example, can be provided with regulating valve stem 310 and be matched with stop valve dish 220 and/or stop valve dish 220
With the guide (sign) of the barrel connector of stop valve bar.Regulating valve stem 310 and adjusting valve disc
Connector (sign) between 320 can also be used as in above-mentioned stop valve dish 220 and/or stop valve
The guiding mechanism of guided-moving in the barrel connector of dish 220 and stop valve bar 210.
Additionally, steam filter screen 80 is also arranged with the outside of valve disc pilot sleeve 70, so as to through admission opening
The steam that mouth 110 and contact aperture 140 enter can be filtered.Therefore, steam filter screen 210 is for example
The passage components such as solid particle foreign matter, the dynamic and static blade in protection steam turbine can be stopped, while it
Valve internal flow regime can be improved.Although the steam filter of tubular is presented in an illustrated embodiment
Net, but other steam filter screen constructions are contemplated that, as long as it is arranged on admission opening mouthful 110 and/or connection
The steam for entering is filtered at network aperture 140.
As shown in Figure 1 and Figure 4, the stop valve mechanism 20 and regulation and accordingly may be used at valve system 30
Part is selected to together constitute stop valve regulating valve combined set structure.The combined set structure is by stop valve
26S Proteasome Structure and Function with regulating valve unites two into one, using dual cannulated sleeve structure type by stationary part
Part, such as valve disc pilot sleeve 70 and steam filter screen 80, and moving component, such as stop valve bar 210,
Stop valve dish 220, regulating valve stem 310 and adjusting valve disc 320, by the concentration group of valve rod installing port 130
In attaching together the inner chamber Q for allocating valve casing 10 into, and the keying of stop valve dish 220 and adjusting valve disc 320 is empty
Between be independent of each other.It will be apparent to one skilled in the art that the combined set structure possesses oneself having in technology solely
Vertical valve group conjunction or the repertoire of union valve combining structure, and with the total pressure loss of smaller valve
With more preferable combination property；But also preferred simple valve shell structure of the invention can be realized.
Although in an illustrated embodiment, stop valve mechanism 20 and regulation valve system 30 include valve rod
And valve disc, but it is also possible to expect other structural forms, such as other valve systems, as long as their energy
Enough that same fluid discharge outlet is opened and closed and/or adjusted independently of one another, this will also fall into of the invention
In scope.In addition, although the nested configuration with " a master one adjust " in an illustrated embodiment, but
The nested configuration of other numbers is also fallen into the scope of the present invention.
Valve activator
It is described with reference to Figure 1 valve activator according to embodiments of the present invention.In shown embodiment
In, stop valve drive mechanism 40 adjusts valve activator 50 by direct-connected connection stop valve bar 210
By lever construction operation connection regulating valve stem 310.Such construction has particular benefit in that.As act
Example and without limitation, stop valve direct-connection transmission structure bang path is short, and driving force transmission speed is fast, passes
Dynamic parts are few and light and handy, and motional inertia is small, and rate of breakdown is low, it is ensured that stop valve dish 220
Quick closing valve speed and close reliability.Regulating valve lever drive structure utilizes amplification of the lever to driving force
Effect and the scale effect to displacement, can improve the regulation sensitivity and displacement of adjusting valve disc 320
Accuracy.The gearratio that regulating valve lever drive structure preferably has is for about 2:1- about 2.5:1.
But in other embodiments, it is contemplated that the other kind of drive.For example, stop valve drives
Motivation structure is by lever construction, and regulating valve is direct-connected, or they are all by lever or all straight
Even, this is fallen within the scope of the present invention.
With continued reference to Fig. 1, bearing 60 is provided with the bonnet 12, the bearing 60 is used for branch
Hold both stop valve drive mechanism 40 and regulation valve activator 50.But it is envisioned that bearing is only
One of them is supported, is neither supported or is not provided with bearing.
As shown in figure 1, the stop valve drive mechanism 40 being supported on bearing 60 is electronic computer
Digital electro-hydraulic adjusting control mechanism (usual abbreviation EDH mechanisms).In the preferred embodiment shown, should
Stop valve drive mechanism 40 may include hydraulic cylinder 410, the liquid presses piston pole 430 with vapour drive rod of deciding
With act on the liquid presses piston pole 430 to apply the bullet of normally closed preset pressure to stop valve bar 210
Spring structure 420.The spring structure 420 includes first spring of outside 422 and inner side second spring of intussusception
424 produce normally closed preset pressure jointly to constitute cluster spring.In an illustrated embodiment, described
One spring 422 has the spring force bigger than second spring 424.
As shown in figure 1, the bearing 60 is with same with stop valve drive mechanism 40 and stop valve bar 210
The through hole that axle is set, accommodates transmission balladeur train 440 in the through hole.The upper end of the transmission balladeur train 440 connects
Connect the liquid presses piston pole 430 of stop valve drive mechanism 40, the stop valve of lower end connection stop valve mechanism 20
Bar 210, so as to the liquid presses piston pole 430 and stop valve bar 210 as main vapour drive rod are coaxial along straight line
Connection.
As shown in figure 1, regulation valve activator 50 is similarly the regulation control of electronic computer digital electro-hydraulic
Mechanism.The regulation valve activator 50 is supported on bearing 60, and with stop valve drive mechanism 40
It is arranged in parallel.In shown embodiment, the regulation valve activator 50 includes hydraulic cylinder 510, uses
Make adjustments the liquid presses piston pole 530 of drive rod and act on the liquid presses piston pole 530 with to regulation
Valve rod 310 applies the spring structure 520 of normally closed preset pressure.The spring structure 520 includes the outer of intussusception
The first spring of side 522 and inner side second spring 524 are produced normally closed default jointly with constituting cluster spring
Pressure.In an illustrated embodiment, first spring 522 has the bullet bigger than second spring 524
Spring force.
As shown in figure 1, driving block 540 is slidably disposed in the transmission balladeur train 440.
In shown embodiment, the connection transmission levers 550 of liquid presses piston pole 530 of valve activator 50 are adjusted
The second end 554 of first end 552, lever be connected to fixed position on bearing, and lever is in centre
Pivotal point 556 is pivotally connected in driving block 540.The driving block 540 is also connected to regulation
Valve rod 310.
In the embodiment shown in the present invention, drive mechanism is the regulation control of electronic computer digital electro-hydraulic
Mechanism processed；It is envisioned that other suitable drive mechanisms.In addition, in the reality shown in the present invention
In applying example, using the kind of drive of direct-connected plus lever, it is envisioned that other transmission means, example
Such as gear drive, Worm Wheel System.
It will be apparent to one skilled in the art that the stop valve direct-connection transmission structure and regulating valve lever drive
Structure, is respectively provided with each independent driving function, so as to provide to stop valve mechanism 20 and regulating valve
The independent manipulation of mechanism 30.
Valve casing component
As it was previously stated, valve casing 10 has in the admission opening mouthful 110, steam discharge aperture of ladder well format
120th, valve rod mounting hole 130 and contact aperture 140.Correspondingly, the admission opening mouthfuls 110,
It is provided with steam discharge aperture 120, valve rod mounting hole 130 and contact aperture 140 close by tools for bolts ' pretension
The adapter assembly that envelope connects.
Valve casing welding self sealss grafting combination will be described with reference to Fig. 2, Fig. 3, Fig. 4 and Fig. 5 below
The specific embodiment of structure.
As shown in Fig. 2 being the partial enlarged drawing of the a-quadrant in figure l, particularly illustrate positioned at valve casing
One shoulder hole in the left side of 10 inner chamber Q, i.e. admission opening mouth 110.The stair-stepping admission opening mouthful
Including with major diameter Φ a1Major diameter portion 112 and with minor diameter Φ a2Minor diameter 114.
The adapter assembly of admission opening mouthful 110 includes stretching into the valve casing 10 entering vapour connecting leg plug connector
150th, between valve casing 10 and plug connector 150 wedge shape sealing ring 152 and for the seal
Apply the tools for bolts ' pretension mechanism of seal preload.This enters vapour connecting leg plug connector 150 from the right side of valve casing 10
Contact aperture is inserted from right to left, and grafting is assemblied in the shoulder hole (admission opening mouthful in the left side of valve casing 10
110) in.Correspondingly, the plug connector 150 includes that be matched with the major diameter portion 112 first is overall
Part 1502, the second integral part 1504 for being matched with the minor diameter 114.
With continued reference to Fig. 2, the tools for bolts ' pretension mechanism is holding device, including connects the plug connector 150
Hold out against flange 154 and hold out against multiple puller bolts 156 that flange 154 is threadedly coupled with this.Shown
Embodiment in, the puller bolt 156 is around the circumference uniform distribution for holding out against flange 154.
The wedge shape sealing ring is set between the admission opening mouthful for entering vapour connecting leg plug connector 150 and valve casing 10
152.The sealing ring 152 has sealing locking angle.Preferably, the sealing angle of wedge is for about 25 ° -35 °,
More preferably α is 30 ° ± 1 °.Correspondingly, the plug connector 150 is included in the first integral part 1502
And the second tapered ramp between integral part 1504.
When puller bolt 156 is equably tightened, you can apply self sealss pretension to sealing ring 152
Power, pretightning force makes sealing ring 152 strongly be extruded and expanded outwardly, sealing ring 152 with enter vapour connecting leg
(shoulder hole is straight greatly in the major diameter portion 112 of the stepped admission opening mouthful 110 of plug connector 152 and valve casing 10
Footpath Φ a1) between, form the annular sealing strip of tight contact.It is huge under high-temperature high-pressure work environment
Main steam pressure act on on vapour connecting leg plug connector 150, the big manyfold of producing ratio pretightning force it is close
Feng Li so that the annular sealing strip for having been formed more tightly contacts No leakage, this sealing structure
Referred to as self sealing structure.Enter the huge extruding force that vapour connecting leg plug connector 150 is produced by sealing ring 152
Assemble the stepped admission opening mouthful 110 being connected on valve casing 10 securely with expansionary force.Therefore, according to
The welding self sealss connected structure of threaded pre-tightening of the invention, can provide has in technology and oneself with oneself
Have a same connection effect and function of the welding structure in valve products manufacturing process, but turn avoid with
The related many critical technological points of different steel weld and manufacturing defect.
In addition, being provided with micro leakage vapour passage L outside the sealing area of the wedge shape sealing ring 1523.
In shown embodiment, the micro leakage vapour passage L3It is arranged on the left side of sealing ring 152.As schemed
Show, leakage vapour passage L3It is included in the annular groove 158 being upwardly formed in week of plug connector 150 and in valve casing
The leakage steam vent 116 formed in 10.Specifically, the leakage steam vent 116 is in stepped admission opening mouthful 110
(the minor diameter Φ a of minor diameter 1142) place formed.Leakage vapour passage L3May be configured to collect dress with leakage vapour
Put connection.In a specific embodiment, leakage vapour passage L3Micro leakage vapour can be introduced into tiny structure
The gland heater of state.By means of the leakage vapour passage, even if the generation of self sealss annular sealing strip is micro
During leakage, leakage vapour also can be collected effectively, it is ensured that No leakage to external world.
As shown in figure 3, being the partial enlarged drawing in the B regions in Fig. 1, particularly illustrate positioned at valve casing
One shoulder hole in the left side of 10 inner chamber Q, that is, get in touch with aperture 140.The shoulder hole has shoulder hole
Major diameter Φ b1With shoulder hole minor diameter Φ b2.Shoulder hole major diameter Φ b1With shoulder hole minor diameter Φ b2
The insertion and assembling that are disposed to facilitate adapter assembly.As shown in figure 3, the contact aperture 140
Also include annular tank 142 and another hierarchic structure 144 on end.Additionally, collar stop
187 are accommodated in the annular tank 142.In an illustrated embodiment, the collar stop 187 by
Polylith annular section, such as 4 to 6 pieces be put together, in order to assemble and be accommodated in the annular
In tank 142.
The adapter assembly in the contact aperture 140 includes stretching into the contact connecting leg plug connector in the valve casing 10
180th, between valve casing 10 and plug connector 180 wedge shape sealing ring 182 and for the seal
Apply the tools for bolts ' pretension mechanism of seal preload.The contact connecting leg plug connector 180 from contact aperture 140
It is inserted into valve casing 10 outward.Above-mentioned shoulder hole major diameter Φ b1With shoulder hole minor diameter Φ b2Can carry
For spacing or backstop the effect inserted.The contact connecting leg plug connector 180 have be matched with the contact hole
Mouth 140, the diameter of phi b for specifically getting in touch with aperture1The first integral part 1802 and size be less than
Second integral part 1804 of first integral part 1802.
With continued reference to Fig. 3, the tools for bolts ' pretension mechanism is take-up device, including is placed on valve casing 10
Tense gland 184 and the multiple turnbuckles 186 being threadedly coupled with the plug connector.In shown implementation
In example, the turnbuckle 186 is around the circumference uniform distribution for tensing gland 184.In shown embodiment
In, the tension gland 184 is placed in hierarchic structure 144.
The wedge shape sealing ring is set between contact connecting leg plug connector 180 and the contact aperture of valve casing 10
182.The sealing ring 182 has sealing locking angle.Preferably, the sealing angle of wedge is for about 25 ° -35 °,
More preferably α is 30 ° ± 1 °.Correspondingly, the plug connector 180 is included in the first integral part 1802
In tapered ramp.
When turnbuckle 186 is equably tightened, you can apply self sealss pretension to sealing ring 182
Power, and annular sealing strip is formed, its operation principle is similar to described in Fig. 2 to technical characteristic.
Similarly, micro leakage vapour passage L is provided with outside the sealing area of the wedge shape sealing ring 1823。
In an illustrated embodiment, the micro leakage vapour passage L3It is arranged on the right side of sealing ring 182.Such as Fig. 3
It is shown, leakage vapour passage L3It is included in the leakage steam vent for tensing gland 184 and being formed in valve casing 10
146、188.Specifically, major diameter Φ b of the leakage steam vent 188 in contact aperture 1401Place's shape
Into.Leakage vapour passage L3It is configured to can be similar to Fig. 2 be connected with leakage vapour collection device.
As shown in figure 4, being the partial enlarged drawing in the C regions in Fig. 1, particularly illustrate positioned at valve casing
One shoulder hole of the downside of 10 inner chamber Q, i.e. steam discharge aperture 120.The stair-stepping steam discharge aperture
Including with major diameter Φ c1Major diameter portion 122 and with minor diameter Φ c2Minor diameter 124.
The adapter assembly in the steam discharge aperture 120 includes stretching into the steam discharge connecting leg plug connector in the valve casing 10
160th, between valve casing 10 and plug connector 160 wedge shape sealing ring 162 and for the seal
Apply the tools for bolts ' pretension mechanism of seal preload.The steam discharge connecting leg plug connector 160 is from the top side of valve casing 10
Valve rod mounting hole from top to bottom is inserted, and grafting is assemblied in the shoulder hole (exhaust hole of the downside of valve casing 10
Mouth 120) in.Correspondingly, the plug connector 160 includes that be matched with the major diameter portion 122 first is whole
Body portion 1602, the second integral part 1604 for being matched with the minor diameter 124.
With continued reference to Fig. 4, the tools for bolts ' pretension mechanism is holding device, including connects the plug connector 160
Hold out against flange 164 and hold out against multiple puller bolts 166 that flange 164 is threadedly coupled with this.Shown
Embodiment in, the puller bolt 166 is around the circumference uniform distribution for holding out against flange 164.
The wedge shape sealing ring is set between steam discharge connecting leg plug connector 160 and the steam discharge aperture of valve casing 10
162.The sealing ring 162 has sealing locking angle.Preferably, the sealing angle of wedge is for about 25 ° -35 °,
More preferably α is 30 ° ± 1 °.Correspondingly, the plug connector 160 is included in the first integral part 1602
And the second tapered ramp between integral part 1604.
When puller bolt 166 is equably tightened, you can apply self sealss pretension to sealing ring 162
Power, and annular sealing strip is formed, its operation principle is similar to described in Fig. 2 to technical characteristic.
Similarly, micro leakage vapour passage L is provided with outside the sealing area of the wedge shape sealing ring 1623。
In an illustrated embodiment, the micro leakage vapour passage L3It is arranged on the downside of sealing ring 162.As schemed
Show, leakage vapour passage L3It is included in the annular groove 168 being upwardly formed in week of plug connector 160 and in valve casing
The leakage steam vent 126 formed in 10.Specifically, the leakage steam vent 126 is in stepped steam discharge aperture 120
(the minor diameter Φ c of minor diameter 1242) place formed.Leakage vapour passage L3Construct with can be similar to Fig. 2
It is connected into leakage vapour collection device.
Additionally, forming valve seat 14 in the steam discharge connecting leg plug connector 150.The valve seat 14 is shown
For example it is affixed in embodiment in the steam discharge connecting leg plug connector 150.As Fig. 4 is best shown at and such as
It is preceding describedly, the position heap of formation annular engagement the contact line M1 and M2 of the valve seat be welded with hard close
Gold, such as stellite (cobalt chromium tungsten hard alloy).Although being set in steam discharge connecting leg plug connector 150
Valve seat has particular benefit in that in terms of manufacture craft is simplified, it is envisioned that valve seat is arranged on other
Position, this is fallen into the scope of the present invention.
As shown in figure 5, being the partial enlarged drawing in the D regions in Fig. 1, particularly illustrate positioned at valve casing
One shoulder hole of the upside of 10 inner chamber Q, i.e. valve rod mounting hole 130.The shoulder hole has rank
Terraced hole major diameter Φ d1With shoulder hole minor diameter Φ d2.Shoulder hole major diameter Φ d1With shoulder hole minor diameter
Φd2The insertion and assembling that are disposed to facilitate adapter assembly.As shown in figure 5, the valve rod mounting hole
Mouth 130 also includes annular tank 132 and another hierarchic structure 134 on end.Additionally, annular
Block 177 is accommodated in the annular tank 132.In an illustrated embodiment, the collar stop
177 are put together by polylith annular section, such as 4 to 6 pieces, in order to assemble and are accommodated in described
In annular tank 132.
The adapter assembly of the valve rod installed part includes stretching into the sealing valve set plug connector in the valve casing 10
170th, between valve casing 10 and plug connector 170 wedge shape sealing ring 172 and for the seal
Apply the tools for bolts ' pretension mechanism of seal preload.The sealing valve covers plug connector 170 from valve rod mounting hole
It is inserted into valve casing 10 outside 130.Above-mentioned shoulder hole major diameter Φ d1With shoulder hole minor diameter Φ d2Can
To provide spacing or backstop the effect of insertion.The sealing valve set plug connector 170 have be matched with the valve
The diameter of phi d of bar mounting hole 130, specifically valve rod mounting hole 1301The first integral part
1702 and size less than first integral part 1702 the second integral part 1704.
With continued reference to Fig. 5, the tools for bolts ' pretension mechanism is take-up device, including is placed on valve casing 10
Tense gland 174 and the multiple turnbuckles 176 being threadedly coupled with the plug connector.In shown implementation
In example, the turnbuckle 176 is around the circumference uniform distribution for tensing gland 174.In shown embodiment
In, the tension gland 174 is placed in hierarchic structure 134.
Covered in sealing valve and the wedge-type seal is set between plug connector 170 and the valve rod mounting hole of valve casing 10
Ring 172.The sealing ring 172 has sealing locking angle.Preferably, the sealing angle of wedge be for about 25 °-
35 °, more preferably α is 30 ° ± 1 °.Correspondingly, the plug connector 170 is included in the first entirety portion
Divide and the tapered ramp between the second integral part.Preferably, can also be in collar stop 177 and wedge
Hold-down ring 179 is set between V-shaped ring 172.
When turnbuckle 176 is equably tightened, you can apply self sealss pretension to sealing ring 172
Power, and annular sealing strip is formed, its operation principle is similar to described in Fig. 2 to technical characteristic.
With reference to Fig. 1, one or more leakage vapour are provided with outside the sealing area of the wedge shape sealing ring 172 and are led to
Road.For example, being provided with two leakage vapour passages in an illustrated embodiment, i.e., the first and second leakage vapour lead to
Road L1And L2.In an illustrated embodiment, first and second leakage vapour passage L1And L2It is arranged on close
The upside of seal ring 172.As shown in figure 1, leakage vapour passage L1Including the leakage steam vent formed in bonnet 12
136.Specifically, through leaking vapour passage L1Leakage steam flow through bonnet 12 inner chamber, and natural leak steam vent
136 outflows.Leakage vapour passage L1, such as leakage steam vent 136 may be configured to leakage vapour collection device be connected.
In a preferred embodiment, through leaking vapour passage L1Leakage vapour lead to oxygen-eliminating device.Leakage vapour passage L2Bag
Include the leakage steam vent 138 formed in bonnet 12.The leakage steam vent 138 be arranged on bonnet 12 guide/around
The part of stop valve bar 210, so as to the gas leaked through valve rod can be with natural leak vapour passage L2Outflow.Should
Leakage vapour passage L2, such as leakage steam vent 138 may be configured to leakage vapour collection device be connected.It is preferred at one
In embodiment, through leaking vapour passage L2Leakage vapour lead to micro-vacuum state gland heater.
As shown in Figure 1 and Figure 5, sealing valve set plug connector 170 is also configured to and valve disc pilot sleeve
70 are connected, for example, coupled by thread connection and/or pin.
Valve casing component parts are prepared and assemble method
Preparation hereafter continuing on valve casing of the invention 10 and the assemble method of valve casing component.
In a preferred embodiment, the valve casing 10 is the monoblock type forge piece of welding.Additionally, this
Invention further relates to the forging method of valve casing 10.In a preferred embodiment, valve casing 10 and grafting
Material and steam turbine main steam pipe material chemical analysis phase selected by part 150,160,170,180
It is same or close.It is highly preferred that the valve casing 10 and plug connector 150,160,170,180 be with
The forge piece that main steam line identical chemical backbone material is made.
As shown in Figure l, valve casing 10 is that a four sides is respectively provided with high temperature and high pressure containers compared with large opening, long
Phase continuously works in the environment of HTHP, and the inner chamber Q of valve casing 10 subjects huge internal pressure, interior
The shape and size of chamber Q, are that the aerothermodynamics design in the routine techniques being had by oneself determines, interior
After the shape and size of chamber Q determine, the structural mechanics and material in the routine techniques that oneself has are recycled
Learn, profile arrangement, wall thickness design and the security strength for carrying out valve casing 10 are checked.Such as preceding institute
State, the material selected by valve casing 10 is same or like with steam turbine main steam pipe material chemical analysis.
The valve casing 10 of overcritical and supercritical turbine generally selects high alloy heat-resistance stainless steel material.Valve casing
10 wall thickness mainly determined by the high temperature allowable stress of main steam pressure, temperature and material, valve casing 10
Except having outside the Pass with materials chemistry composition, the blank also with valve casing 10 prepares shape to the high temperature allowable stress of material
Formula is relevant, the material of same chemical analysis, and rough forging has very with the high temperature allowable stress of cast blank
Big difference, the high temperature allowable stress of usual rough forging is 1.3-1.4 times of cast blank, that is, valve
The wall thickness of the rough forging of shell 10 is only 70% or so of cast blank.
Because the outer shape of valve casing of the invention 10 is simple, it is suitable for forging and molding, valve casing 10
Inner chamber Q and four ladder hole shapes and size, be suitable for machining shaping, therefore valve casing 10
First-selection uses rough forging, and can obtain corresponding technical advantage and cost advantage.For example, this area
Technical staff be readily apparent that, valve casing 10 in the case where shape and size are suitable, using rough forging
Tool has an enormous advantage, and wall thickness is relatively thin, and appearance and size is smaller, and lighter in weight, inherent quality has guarantor
Card, service life and security significantly improve, using the valve casing 10 of rough forging combination property and
The ratio of performance to price, hence it is evident that better than cast blank, power plant user is also more willing to accept the valve of rough forging
Product.
Although valve casing 10 is preferably forge piece in a preferred embodiment, it is contemplated that valve casing 10
Can also be the monoblock type cast member of welding, this will be also fallen into the scope of the present invention.Such nothing
The cast member of welding still has significant compared to the valve casing that the need of prior art are welded into, steam discharge connecting leg
Advantage.
The forging or casting that adapter assembly is assembled to monoblock type in the way of welding is discussed further below
The method for making valve casing.
In one embodiment, the assemble method is comprised the following steps：
(I) providing has admission opening mouthful 110, steam discharge aperture 120, valve rod mounting hole 130 and connection
The admission opening mouthful 110 of the valve casing 10 in network aperture 140, wherein valve casing 10 and steam discharge aperture 120 include
Shoulder hole with major diameter portion 112,122 and minor diameter 114,124, the valve rod peace of valve casing 10
Dress aperture 130 and contact aperture 140 are equipped with collar stop 177,187 and accommodate the collar stop
Annular tank 132,142；
(II) will there is the first integral part 1502 for being matched with 110 major diameter portions 112 of admission opening mouthful
The vapour connecting leg that enters with the second integral part 1504 of the minor diameter 114 for being matched with admission opening mouthful 110 is inserted
Fitting 150 inserts the admission opening mouthful 110 through the contact aperture 140, will enter steam packing sealing i.e. wedge
V-shaped ring 152 enters between vapour connecting leg plug connector 150 and admission opening mouthful 110 described in being clamped in；
(III) vapour threaded pre-tightening mechanism will be entered to be attached to connect so that this is entered into vapour into vapour connecting leg plug connector 150
Pipe plug connector 150 and the pretension of wedge shape sealing ring 152 are attached to the admission opening mouthful 110；
(IV) inserting into after vapour connecting leg plug connector 150, insertion contact connecting leg plug connector 180 and
The collar stop 187 for getting in touch with aperture 140 is positioned in annular tank 142, seal will be got in touch with
I.e. wedge shape sealing ring 182 is clamped in the annular in the contact connecting leg plug connector 180 and contact aperture 140
Between block 187；
(V) contact threaded pre-tightening mechanism is attached into contact connecting leg plug connector to be inserted with by the contact connecting leg
Fitting 180 and the pretension of wedge shape sealing ring 182 are attached to the contact aperture 140；
(VI) will there is the first integral part 1602 for being matched with the major diameter portion 122 of steam discharge aperture 120
Steam discharge connecting leg with the second integral part 1604 of the minor diameter 124 for being matched with steam discharge aperture 120 is inserted
Fitting 160 inserts the steam discharge aperture 120 from the valve rod mounting hole 130, by steam discharge seal
I.e. wedge shape sealing ring 162 is clamped between the steam discharge connecting leg plug connector 160 and steam discharge aperture 120；
(VII) steam discharge threaded pre-tightening mechanism is attached into steam discharge connecting leg plug connector 160 to connect with by the steam discharge
Pipe plug connector 160 and the pretension of wedge shape sealing ring 162 are attached to the steam discharge aperture 120；
(VIII) after insertion steam discharge connecting leg plug connector 160, insertion sealing valve set plug connector 170 and
The collar stop 177 of valve rod mounting hole 130 is positioned in annular tank 132, valve pocket is close
Sealing is that wedge shape sealing ring 172 is clamped in sealing valve set plug connector 170 and the valve rod mounting hole 130
Collar stop 177 between；
(Ⅸ) valve pocket threaded pre-tightening mechanism is attached to sealing valve set plug connector 170 with by the sealing valve
Set plug connector 170 and the pretension of wedge shape sealing ring 172 are attached to the valve rod mounting hole 130.
In the method, above-mentioned sequence number and order is referred not to, except clearly stating or according to technical requirements
Can clearly determine, can be performed before preceding sequence number otherwise the step of rear sequence number.For example, step
(IV) though to be performed after step (II), can be performed before step (III).Example again
Such as, performed before step (VI)-(IX) is integrally moved to step (II)-(V).
In this embodiment, it is above-mentioned enter vapour connecting leg plug connector 150, steam discharge connecting leg plug connector 160, sealing
The parts such as valve pocket plug connector 170, contact connecting leg plug connector 180 and corresponding tools for bolts ' pretension mechanism together with
Valve casing 10 collectively forms the valve casing welding self sealss grafting combination knot of the main vapour regulation union valve 1 of high pressure
Structure, also abbreviation valve casing component.The valve casing welding self sealss inserted combination structure, and with the structure
Other related accessories, all using the cold working in existing routine techniques and cold setting technique
Route, fully phased out in existing technology and in existing valve products manufacturing process with highly difficult weldering
A series of related sport technique segments and technical process are connect, it is main big with many places including eliminating valve casing 10
Work before procedure qualification, weldering before the weldering of the different steel weld of the big wall thickness high alloy heat-resistance stainless steel pipe fitting of caliber
Skill preparation, weld preheating, welding overall process, postwelding local heat treatmet, the lossless radiographic inspection of weld seam,
The technical process such as overall de-stress heat treatment, surfaces externally and internally blasting treatment and the water pressure test.This area
Technical staff is readily apparent that, using valve casing welding self sealss inserted combination structure, avoids completely and weldering
Connect technical process related technology barrier and critical technological point, maximize favourable factors and minimize unfavourable ones, make the manufacture of valve products and
Assembly technology flow is greatly simplified, and technology difficulty is substantially reduced, and the production cycle substantially shortens, comprehensive
Can be significantly improved with the ratio of performance to price.
Turbine system
The invention further relates to a kind of turbine system, including：One or more steam turbines, with high pressure
Cylinder and mesolow cylinder；The main vapour regulation union valve 1 of high pressure of the invention, connects the height of the steam turbine
Cylinder pressure；With the middle pressure valve device of the mesolow cylinder for connecting the steam turbine.
Preferably, the turbine system has the main vapour regulation union valve 1 of the high pressure described at least two, wherein
The admission opening mouthful 110 of the main vapour regulation union valve 1 of at least two high pressures is connected in parallel to the vapour of upstream
Turbine main steam line, the steam discharge aperture 120 of the main vapour regulation union valve 1 of at least two high pressures is simultaneously
Connection is connected to the high pressure cylinder of steam turbine.In a preferred embodiment, the main vapour regulation of the two high pressures
Union valve 1 makes its respective contact aperture 140 be connected by connecting leg.
In a preferred embodiment, the supplement as contact function and extension, the contact aperture 140
There can also be the effect of supplement steam.Preferably, for example the turbine system can be in each contact hole
On pipeline between mouthfuls 140, set the less high pressure filling regulating valve of one or more flows for
A small amount of steam is supplemented to the high pressure cylinder of steam turbine.High pressure filling regulating valve is more than volume in Steam Turbine power
Determine to participate in regulation during power, the overall efficiency of Steam Turbine can be improved.
In foregoing preferred embodiment, overcritical according to an embodiment of the invention and ultra supercritical vapour
The main vapour regulation union valve 1 of turbine high pressure adjusts valve casing welding self sealss inserted combination structure, stop valve
Section valve pocket assembling composite structure, stop valve direct-connection transmission structure and regulating valve lever drive structure etc. are various excellent
Selecting technology scheme collection realizes best match combination and parameter configuration together in one.But clearly refer to herein
Go out, the technical scheme of foregoing several primary structures is not limited only to merging and uses, and can be combined with
The concrete structure and parameter of all kinds of high pressure valves need to be used alone or flexible combination is used, and each falls within this
In the protection domain of invention.
The main vapour regulation union valve 1 of overcritical according to an embodiment of the invention and supercritical turbine high pressure
Be not limited only to the placement state shown in Fig. 1, i.e. axial line 90 both can be at it is as shown in Figure 1 vertical
State, can also be in horizontality or other free positions.Correspondingly, steam discharge aperture 120 and steam discharge
Direction 102 can also be selected as down, in the horizontal direction or other any directions.That is, can
To select the placement state of valve according to actual needs.
The main vapour regulation union valve 1 of overcritical according to an embodiment of the invention and supercritical turbine high pressure
Power station steam turbine industry is not limited only to, each type high temp, high pressure, swiftly flowing stream is can be also used for
The joint of the purposes such as conveying, regulation, control and the security protection of body, especially all kinds of gas mediums
Valve, has a wide range of applications field, good applicability and good versatility.
Example system of the invention and method have been specifically illustrated and have described with reference to above-described embodiment, its
Only implement the example of the optimal mode of the system and method.It will be appreciated by those skilled in the art that
Can be that various is done to the embodiment of system and method described herein when the system and/or method is implemented
Change without deviating from the spirit and scope of the present invention for defining in the following claims.Appended right will
Seek the scope for being intended to define the system and method, thus fall into these claims and be equal to it be
System and method can be included.The above description of the system and method should be read to include described herein
Whole new and non-obvious elements combination, and there may be in the application or subsequent application
It is related to the claim of the combination of any new and non-obvious element.Additionally, above-described embodiment
It is exemplary, may be all combined for what can be claimed in the application or subsequent application
In, neither one single features or element are essential.
Reference numerals list (is arranged) by appearance order in text:
| Sequentially | Mark | Title | Sequentially | Mark | Title | Sequentially | Mark | Title |
| 1 | 1 | Union valve | 36 | 530 | Liquid presses piston pole | 71 | 188 | Leakage steam vent |
| 2 | 10 | Valve casing | 37 | 520 | Spring structure | 72 | Φc1 | Shoulder hole major diameter |
| 3 | 20 | Stop valve mechanism | 38 | 522 | First spring | 73 | 122 | Major diameter portion |
| 4 | 30 | Regulation valve system | 39 | 524 | Second spring | 74 | Φc2 | Shoulder hole minor diameter |
| 5 | 40 | Stop valve drives | 40 | 550 | Transmission levers | 75 | 124 | Minor diameter |
| 6 | 50 | Regulating valve drives | 41 | 552 | First end pivotal point | 76 | 160 | Plug connector |
| 7 | 120 | Steam discharge aperture | 42 | 554 | Second end pivotal point | 77 | 162 | Wedge shape sealing ring |
| 8 | G | Flow | 43 | 556 | Medial pivot point | 78 | 1602 | First integral part |
| 9 | P | Pressure | 44 | 540 | Driving block | 79 | 1604 | Second integral part |
| 10 | T | Temperature | 45 | Φa1 | Shoulder hole major diameter | 80 | 164 | Hold out against flange |
| 11 | 110 | Admission opening mouthful | 46 | 112 | Major diameter portion | 81 | 166 | Puller bolt |
| 12 | 130 | Valve rod mounting hole | 47 | Φa2 | Shoulder hole minor diameter | 82 | 168 | Annular groove |
| 13 | 140 | Contact aperture | 48 | 114 | Minor diameter | 83 | 126 | Leakage steam vent |
| 14 | Q | Inner chamber | 49 | 150 | Plug connector | 84 | Φd1 | Shoulder hole major diameter |
| 15 | 101 | Enter vapour direction | 50 | 152 | Wedge shape sealing ring | 85 | Φd2 | Shoulder hole minor diameter |
| 16 | 102 | Steam discharge direction | 51 | 1502 | First integral part | 86 | 132 | Annular tank |
| 17 | 14 | Valve seat | 52 | 1504 | Second integral part | 87 | 134 | Hierarchic structure |
| 18 | 220 | Stop valve dish | 53 | 154 | Hold out against flange | 88 | 177 | Collar stop |
| 19 | M1 | Coordinate contact line | 54 | 156 | Puller bolt | 89 | 170 | Plug connector |
| 20 | 320 | Adjusting valve disc | 55 | α | The sealing angle of wedge | 90 | 172 | Wedge shape sealing ring |
| 21 | M2 | Coordinate contact line | 56 | L3 | Micro leakage vapour passage | 91 | 1702 | First integral part |
| 22 | 12 | Bonnet | 57 | 158 | Annular groove | 92 | 1704 | Second integral part |
| 23 | 210 | Stop valve bar | 58 | 116 | Leakage steam vent | 93 | 174 | Tense gland |
| 24 | 90 | Axial line | 59 | Φb1 | Shoulder hole major diameter | 94 | 176 | Turnbuckle |
| 25 | 310 | Regulating valve stem | 60 | Φb2 | Shoulder hole minor diameter | 95 | 179 | Hold-down ring |
| 26 | 70 | Valve disc fairlead | 61 | 142 | Annular tank | 96 | L1 | First leakage vapour passage |
| 27 | 80 | Steam filter screen | 62 | 144 | Hierarchic structure | 97 | L2 | Second leakage vapour passage |
| 28 | 60 | Bearing | 63 | 187 | Collar stop | 98 | 136 | Leakage steam vent |
| 29 | 410 | Hydraulic cylinder | 64 | 180 | Plug connector | 99 | 138 | Leakage steam vent |
| 30 | 430 | Liquid presses piston pole | 65 | 182 | Wedge shape sealing ring | 100 | A | Partial view |
| 31 | 420 | Spring structure | 66 | 1802 | First integral part | 101 | B | Partial view |
| 32 | 422 | First spring | 67 | 1804 | Second integral part | 102 | C | Partial view |
| 33 | 424 | Second spring | 68 | 184 | Tense gland | 103 | D | Partial view |
| 34 | 440 | Transmission balladeur train | 69 | 186 | Turnbuckle | |||
| 35 | 510 | Hydraulic cylinder | 70 | 146 | Leakage steam vent |
Claims (14)
1. a kind of main vapour of turbine high-pressure adjusts the valve casing component of union valve, including：
Valve casing (10), with admission opening mouthful (110), steam discharge aperture (120), valve rod mounting hole
Mouth (130) and contact aperture (140)；With
It is arranged on the admission opening mouthful (110), steam discharge aperture (120), valve rod mounting hole
(130) adapter assembly and at least one of contact aperture (140), wherein the adapter assembly
Connect with valve casing (10) sealing by tools for bolts ' pretension.
2. valve casing component according to claim 1, wherein, the adapter assembly includes stretching into described
Enter vapour connecting leg plug connector (150), steam discharge connecting leg plug connector (160), sealing in valve casing (10)
Valve pocket plug connector (170) or contact connecting leg plug connector (180), the adapter assembly also include being located at
Seal between valve casing (10) and respective plug connector (150,160,170,180) and it is used for
Applied with to the seal with respect to plug connector (150,160,170,180) described in valve casing (10) pretension
Plus the tools for bolts ' pretension mechanism of seal preload.
3. valve casing component according to claim 2, wherein the tools for bolts ' pretension mechanism includes connection institute
State holding out against flange (154,164) and hold out against flange (154,164) with this and being threadedly coupled for plug connector
Puller bolt (156,166).
4. valve casing component according to claim 2, wherein the tools for bolts ' pretension mechanism includes being placed in
Tension gland (174,184) and the tension spiral shell being threadedly coupled with the plug connector on valve casing (10)
Bolt (176,186).
5. valve casing component according to claim 2, wherein, the seal is wedge shape sealing ring
(152、162)；The aperture for being provided with the adapter assembly be with major diameter portion (112,
122) with the shoulder hole of minor diameter (114,124), the plug connector of the adapter assembly includes matching
The first integral part (1502,1602) in the major diameter portion (112,122), it is matched with institute
State second integral part (1504,1604) of minor diameter (114,124) and towards the wedge shape
The tapered ramp of sealing ring (152,162)；Wherein tools for bolts ' pretension mechanism be attached to the plug connector and
Plug connector described in relatively small diameter portion pretension is configured to apply with to the wedge shape sealing ring (152,162)
Seal preload.
6. valve casing component according to claim 2, wherein, the seal is wedge shape sealing ring
(172、182)；Be provided with the adapter assembly aperture be provided with collar stop (177,
187) it is described to connect with the annular tank (132,142) for accommodating the collar stop (177,187)
The plug connector of head assembly includes being matched with the first integral part (1702,1802), the footpath in the aperture
To size less than first integral part (1702,1802) the second integral part (1704,
1804) and towards the tapered ramp of the wedge shape sealing ring (172,182)；Wherein tools for bolts ' pretension machine
Structure is attached to the plug connector and is configured to opposed annular block (177,187) plug connector described in pretension
Apply seal preload with to the wedge shape sealing ring (172,182).
7. valve casing component according to claim 5, wherein, it is provided with the aperture of the adapter assembly
It is admission opening mouthful (110) and/or steam discharge aperture (120).
8. valve casing component according to claim 6, wherein, it is provided with the aperture of the adapter assembly
It is valve rod mounting hole (130) and/or contact aperture (140).
9. valve casing component according to claim 6, wherein, the collar stop (177,187)
It is put together by polylith annular section, to be accommodated in the annular tank (132,142).
10. the valve casing component according to claim 5 or 6, wherein, the wedge shape sealing ring
(152,162,172,182) are with 25 ° -35 ° of the sealing angle of wedge (α).
The 11. valve casing component according to any one of claim 2 to 9, wherein, in admission opening mouthful
(110), in steam discharge aperture (120), valve rod mounting hole (130) and contact aperture (140)
It is provided with the aperture of adapter assembly, is provided with the leakage vapour passage outside the sealing area of the seal
(L1、L2、L3)。
A kind of 12. main vapour of turbine high-pressure adjust union valve (1), including stop valve mechanism (20), tune
Section valve system (30) and the valve casing component according to any one of claim 1 to 11, wherein institute
State stop valve mechanism (20) and/or regulation valve system (30) is constructed to be permeable to open independently of one another or cuts
The only steam discharge aperture (120).
The 13. main vapour of turbine high-pressure according to claim 12 adjust union valve (1), and it is super
The main vapour regulation union valve of critical and supercritical turbine high pressure.
A kind of 14. methods of the valve casing component for assembling the main vapour regulation union valve of turbine high-pressure, including：
Valve casing is provided, it has admission opening mouth, steam discharge aperture, valve rod mounting hole and contact aperture,
Wherein the admission opening mouthful of valve casing and steam discharge aperture include the ladder with major diameter portion and minor diameter
Hole, the valve rod mounting hole of valve casing and contact aperture are equipped with collar stop and accommodate the collar stop
Annular tank；
To have and be matched with first integral part in admission opening mouthful major diameter portion and be matched with admission opening mouthful
The vapour connecting leg plug connector that enters of the second integral part of minor diameter enters vapour through described in the insertion of the contact aperture
Aperture, will enter steam packing sealing be clamped in it is described enter between vapour connecting leg plug connector and admission opening mouthful；
To enter vapour threaded pre-tightening mechanism be attached into vapour connecting leg plug connector with by this enter vapour connecting leg plug connector and
This enters steam packing sealing pretension and is attached to the admission opening mouthful；
Inserting into after vapour connecting leg plug connector, insertion is got in touch with connecting leg plug connector and will get in touch with the ring in aperture
Shape block is positioned in annular tank, will contact seal be clamped in it is described contact connecting leg plug connector and
Get in touch between the collar stop in aperture；
Will contact threaded pre-tightening mechanism be attached to contact connecting leg plug connector with by the contact connecting leg plug connector and
The contact seal pretension is attached to the contact aperture；
To have and be matched with first integral part in steam discharge aperture major diameter portion and be matched with steam discharge aperture
The steam discharge connecting leg plug connector of the second integral part of minor diameter is described from valve rod mounting hole insertion
Steam discharge aperture, steam discharge seal is clamped between the steam discharge connecting leg plug connector and steam discharge aperture；
Steam discharge threaded pre-tightening mechanism is attached to steam discharge connecting leg plug connector with by the steam discharge connecting leg plug connector and
The steam discharge seal pretension is attached to the steam discharge aperture；
After steam discharge connecting leg plug connector is inserted, insertion sealing valve set plug connector and by valve rod mounting hole
Collar stop be positioned in annular tank, valve pocket seal is clamped in sealing valve set grafting
Between the collar stop of part and valve rod mounting hole；
By valve pocket threaded pre-tightening mechanism be attached to sealing valve set plug connector with by the sealing valve set plug connector and
The valve pocket seal pretension is attached to the valve rod mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510470896.4A CN106703902B (en) | 2015-08-04 | 2015-08-04 | Overcritical and supercritical turbine high pressure valve shell component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510470896.4A CN106703902B (en) | 2015-08-04 | 2015-08-04 | Overcritical and supercritical turbine high pressure valve shell component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106703902A true CN106703902A (en) | 2017-05-24 |
| CN106703902B CN106703902B (en) | 2018-06-22 |
Family
ID=58929837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510470896.4A Active CN106703902B (en) | 2015-08-04 | 2015-08-04 | Overcritical and supercritical turbine high pressure valve shell component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106703902B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500414A (en) * | 2019-09-23 | 2019-11-26 | 浙江华元汽轮机械有限公司 | Steam turbine and its quick-closing valve |
| CN110513489A (en) * | 2019-09-23 | 2019-11-29 | 浙江华元汽轮机械有限公司 | Steam turbine and its quick-closing valve system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016813A (en) * | 2012-12-07 | 2013-04-03 | 上海电气电站设备有限公司 | High temperature and high pressure valve structure of steam turbine |
| CN204113357U (en) * | 2014-06-18 | 2015-01-21 | 中国长江动力集团有限公司 | Main stop valve |
| CN104632299A (en) * | 2014-12-02 | 2015-05-20 | 上海电气电站设备有限公司 | United inlet valve of steam turbine |
-
2015
- 2015-08-04 CN CN201510470896.4A patent/CN106703902B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016813A (en) * | 2012-12-07 | 2013-04-03 | 上海电气电站设备有限公司 | High temperature and high pressure valve structure of steam turbine |
| CN204113357U (en) * | 2014-06-18 | 2015-01-21 | 中国长江动力集团有限公司 | Main stop valve |
| CN104632299A (en) * | 2014-12-02 | 2015-05-20 | 上海电气电站设备有限公司 | United inlet valve of steam turbine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500414A (en) * | 2019-09-23 | 2019-11-26 | 浙江华元汽轮机械有限公司 | Steam turbine and its quick-closing valve |
| CN110513489A (en) * | 2019-09-23 | 2019-11-29 | 浙江华元汽轮机械有限公司 | Steam turbine and its quick-closing valve system |
| CN110513489B (en) * | 2019-09-23 | 2024-04-09 | 浙江华元汽轮机械有限公司 | Steam turbine and quick-closing valve system thereof |
| CN110500414B (en) * | 2019-09-23 | 2024-04-09 | 浙江华元汽轮机械有限公司 | Steam turbine and quick-closing valve thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106703902B (en) | 2018-06-22 |
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