CN206419487U - Steam turbine integral type inlet valve - Google Patents
Steam turbine integral type inlet valve Download PDFInfo
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- CN206419487U CN206419487U CN201621432704.7U CN201621432704U CN206419487U CN 206419487 U CN206419487 U CN 206419487U CN 201621432704 U CN201621432704 U CN 201621432704U CN 206419487 U CN206419487 U CN 206419487U
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Abstract
The utility model is related to steam turbine technology field, more particularly to a kind of steam turbine integral type inlet valve, including valve casing, valve casing has axially disposed valve pocket, the air intake and venthole misplaced vertically is offered in the cavity wall of valve pocket, coaxially arranged valve seat, shut-off valve assemblies and valve assembly are provided with valve pocket, valve seat is located between air intake and venthole, shut-off valve assemblies are located at air intake side and composition stop valve is engaged with valve seat and valve casing, and valve assembly located at venthole side and is engaged composition regulating valve with valve seat and valve casing.Stop valve and regulating valve are coaxial, be reversely located in same valve casing and share same valve seat, are integrally formed formula inlet valve, simple in construction, greatly reduce the appearance and size of inlet valve, reduce valve casing materials, reduce cost, facilitate the arrangement of Steam Turbine；Stop valve is arranged on air intake side, ensure that and completely close inlet valve in the case of unit failure, so that unit safety is ensured, good reliability.
Description
Technical field
The utility model is related to steam turbine technology field, more particularly to a kind of steam turbine integral type inlet valve.
Background technology
Inlet valve is the critical component in Steam Turbine, and the security and unit efficiency to Steam Turbine have a major impact.
Conventional steam turbine inlet valve uses separate shut-off valve assemblies and valve assembly, and stop valve and regulating valve are to separate
, there is each independent valve seat even valve casing.As steam turbine enters the increase of steam space flow, inlet valve size also constantly expands
Greatly, this results in big raw materials consumption, space arrangement hardly possible, the time-consuming a series of problems of waiting so long of Unit Commitment.Using stop valve and tune
The mode of section valve combined layout can be effectively improved these problems.
The inlet valve of combined layout formula, its basic conception is off valve and regulating valve is disposed coaxially on the valve of same valve casing
Intracavitary simultaneously shares a valve seat.The inlet valve of existing combined layout formula, by the way of stop valve and regulating valve are arranged arrangement,
Complicated, regulation reliability and stability are undesirable.
Utility model content
The technical problems to be solved in the utility model is to provide that a kind of simple in construction, size is small, good reliability steam turbine
Integral type inlet valve, to overcome the drawbacks described above of prior art.
In order to solve the above-mentioned technical problem, the utility model is adopted the following technical scheme that：A kind of steam turbine integral type enters vapour
Valve, including valve casing, valve casing, which has, to be offered the air intake misplaced vertically and goes out in axially disposed valve pocket, the cavity wall of valve pocket
Steam ports, is provided with coaxially arranged valve seat, shut-off valve assemblies and valve assembly in valve pocket, valve seat located at air intake and venthole it
Between, shut-off valve assemblies are located at air intake side and composition stop valve is engaged with valve seat and valve casing, and valve assembly is located at venthole
Side is simultaneously engaged composition regulating valve with valve seat and valve casing.
Preferably, valve assembly include located at valve pocket close to one end of venthole regulating valve bonnet, axially through
The regulating valve rod of regulating valve bonnet and the regulation valve core of the one end stretched into located at regulating valve rod in valve pocket, regulation valve core
Closure or the cooperation opened are realized with valve seat.
Preferably, one end that the valve seat orifice of valve seat is engaged with regulation valve core is in reaming shape, regulation valve core and valve seat
The end face being engaged is towards the raised conical surface of valve seat.
Preferably, the angle of flare of one end that valve seat orifice is engaged with regulation valve core is 3 ° -10 °, regulation valve core and valve
The face angle for the end face that seat is engaged is 30 ° -60 °.
Preferably, regulation valve core is connected with regulating valve bonnet key.
Preferably, pressure release through hole is offered on regulation valve core vertically.
Preferably, shut-off valve assemblies include located at valve pocket close to one end of air intake stop valve bonnet, axially through
The stop valve valve rod of stop valve bonnet and the cut-off valve core of the one end stretched into located at stop valve valve rod in valve pocket, end valve core
Closure or the cooperation opened are realized with valve seat.
Preferably, it is provided with equalizing valve between stop valve valve rod and cut-off valve core.
Preferably, the single piece that valve seat is formed in one with valve casing.
Preferably, valve seat is connected with valve casing interference fit.
Compared with prior art, the utility model has significant progressive：
Stop valve and regulating valve are coaxial, be reversely located in same valve casing and share same valve seat, are integrally formed formula inlet valve,
It is simple in construction, the appearance and size of inlet valve is greatly reduced, valve casing materials is reduced, reduces cost, facilitate Steam Turbine
Arrangement；Stop valve is arranged on air intake side, ensure that and completely close inlet valve in the case of unit failure, so as to protect
Hinder unit safety, good reliability.
Brief description of the drawings
Fig. 1 is the structural representation of the steam turbine integral type inlet valve of the utility model embodiment.
In figure：
1st, valve casing 100, valve pocket 2, air intake
3rd, equalizing valve 4, shut-off valve assemblies 5, valve seat
6th, valve assembly 7, regulation valve core 8, chute
9th, convex key 10, regulating valve bonnet 11, pressure release through hole
12nd, venthole 13, regulating valve rod 14, regulating valve oil motivator mounting
15th, stop valve bonnet 16, stop valve valve rod 17, cut-off valve core
18th, stop valve servomotor mounting 19, pressure ring 20, annular compartment
21st, vapor-permeable hole 22, through hole
Embodiment
Embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.These embodiments are only
For illustrating the utility model, and it is not limitation of the utility model.
, it is necessary to explanation in description of the present utility model, term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicate
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " be only used for describe purpose, and it is not intended that indicate or
Imply relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on can understanding as the case may be
State concrete meaning of the term in the utility model.
In addition, in description of the present utility model, unless otherwise indicated, " multiple " are meant that two or more.
As shown in figure 1, a kind of embodiment of steam turbine integral type inlet valve of the present utility model.
The steam turbine integral type inlet valve of the present embodiment includes valve casing 1, and valve casing 1 has axially disposed valve pocket 100.Valve
The air intake 2 and venthole 12 misplaced vertically is offered in the cavity wall of chamber 100, air intake 2 is used to connect steam inlet pipe road, goes out vapour
Mouth 12 is used to connect steam outlet pipe road.Valve seat 5, shut-off valve assemblies 4 and valve assembly 6, and valve seat 5, cut-off are provided with valve pocket 100
Valve module 4 and valve assembly 6 are coaxially arranged.Valve seat 5 be located between air intake 2 and venthole 12, shut-off valve assemblies 4 be located at into
The side of steam ports 2, shut-off valve assemblies 4 are engaged composition stop valve with valve seat 5 and valve casing 1, and valve assembly 6 is located at the side of venthole 12,
Valve assembly 6 is engaged composition regulating valve with valve seat 5 and valve casing 1.
Thus, stop valve and regulating valve coaxially, are reversely located in same valve casing 1 and share same valve seat 5 by the present embodiment,
Formula inlet valve is integrally formed, it is simple in construction, the appearance and size of inlet valve is greatly reduced, valve casing materials is reduced, reduces into
This, facilitates the arrangement of Steam Turbine.Stop valve is arranged on the side of air intake 2, be ensure that complete in the case of unit failure
Contract fully inlet valve, so that unit safety is ensured, good reliability.
The single piece that valve seat 5 in the present embodiment can be formed in one with valve casing 1, can simplify manufacturing process, pass through
Being processed and formed at one time to obtain.Valve seat 5 can also be connected with valve casing 1 by interference fit.
Further, in the present embodiment, valve assembly 6 includes regulating valve bonnet 10, regulating valve rod 13 and regulating valve
Valve element 7.Regulating valve bonnet 10 is located at the valve pocket 100 of valve casing 1 close to one end of venthole 12, and regulating valve bonnet 10 passes through regulating valve
Servomotor mounting 14 and bolt are compressed with the end of valve casing 1 to be connected.Regulating valve rod 13 is axially therethrough regulating valve bonnet 10
And stretch into valve pocket 100.Regulation valve core 7 is located at the one end stretched into valve pocket 100 of regulating valve rod 13, regulation valve core 7 with
Valve seat 5 realizes closure or the cooperation opened, so as to realize the valve seat orifice of valve seat 5 and the cut-off of venthole 12 or connect, Jin Erke
In the state of being opened in stop valve, realize the cut-off of air intake 2 and venthole 12 or connect.By adjusting regulation valve core 7
The distance between with valve seat 5, it is possible to achieve the regulation of control valve opening size, so as to adjust into steam flow amount.
In order to optimize steam flow field structure, reduce the pressure loss, it is preferable that the valve seat orifice of the valve seat 5 in the present embodiment with
One end that regulation valve core 7 is engaged is in reaming shape, and the end face that regulation valve core 7 is engaged with valve seat 5 is raised towards valve seat 5
The conical surface.By the conical surface of regulation valve core 7 and being mutually matched for the reaming of valve seat 5, the stability in flow field is ensure that, is reduced
The pressure loss, and then improve Steam Turbine efficiency, also, realize the inverse steam flow of regulating valve and arrange, it is to avoid low flow rate condition
Under because of situations such as valve opening is unstable caused by pressure oscillation or even closes suddenly, improve regulating valve small guide vane stable
Property.Further, the angle of flare for one end reaming that the valve seat orifice of valve seat 5 is engaged with regulation valve core 7 is 3 ° -10 °, regulating valve valve
The face angle for the end face that core 7 is engaged with valve seat 5 is 30 ° -60 °.
In order to prevent regulation valve core 7 from rotating in the course of the work, it is preferable that the regulation valve core in the present embodiment
7 are connected with the key of regulating valve bonnet 10.The present embodiment is offered vertically in regulation valve core 7 close to one end of regulating valve bonnet 10
Pilot hole, and chute 8 is offered vertically on the hole wall of the pilot hole, in regulating valve bonnet 10 close to regulation valve core 7
One end outer surface is provided with convex key 9, and regulating valve bonnet 10 inserts the assembling of regulation valve core 7 close to one end of regulation valve core 7
Convex key 9 on Kong Zhong, and regulating valve bonnet 10 is slideably inserted in the chute 8 on pilot hole hole wall.By convex key 9 with sliding
The mutual cooperation of groove 8, can limit the rotation of regulation valve core 7 circumferentially, while the effect of guiding is also functioned to, and by inciting somebody to action
Regulating valve bonnet 10 is inserted in the pilot hole of regulation valve core 7 close to one end of regulation valve core 7, can also further shorten valve
The length of shell 1, so as to further reduce the overall dimensions and production cost of integral type inlet valve.
For the ease of the control of regulating valve, it is preferable that offer pressure release on the regulation valve core 7 of the present embodiment vertically and lead to
Hole 11, the valve seat orifice and venthole 12 of the connection valve seat 5 of pressure release through hole 11.
Further, in the present embodiment, shut-off valve assemblies 4 include stop valve bonnet 15, stop valve valve rod 16 and stop valve
Valve element 17, stop valve bonnet 15 is located at the valve pocket 100 of valve casing 1 close to one end of air intake 2, and stop valve bonnet 15 passes through stop valve
Servomotor mounting 18 and bolt are compressed with the end of valve casing 1 to be connected.Stop valve valve rod 16 is axially therethrough stop valve bonnet 15
And stretch into valve pocket 100.Cut-off valve core 17 is located at one end that stop valve valve rod 16 is stretched into valve pocket 100, ends valve core 17
Closure or the cooperation opened are realized with valve seat 5, so as to realize the valve seat orifice of valve seat 5 and the cut-off of air intake 2 or connect, Jin Erke
To be cooperated with regulating valve to realize the cut-off of air intake 2 and venthole 12 or connect.
In order to reduce the opening force of stop valve, it is preferable that the present embodiment stop valve valve rod 16 with cut-off valve core 17 it
Between be provided with equalizing valve 3.Equalizing valve 3 includes valve core of pre-inlet valve, and the valve core of pre-inlet valve is located at stop valve valve rod 16 and stop valve valve
The flange for the end that core 17 is engaged.Cut-off valve core 17 in the present embodiment is provided with the stepped hole of insertion, the step vertically
Hole is included close to the large diameter hole of stop valve bonnet 15 and away from stop valve bonnet 15 and the path connected with the valve seat orifice of valve seat 5
A pressure ring 19 is provided with hole, large diameter hole, is formed and is opened on an annular compartment 20, pressure ring 19 between pressure ring 19 and the step surface of stepped hole
It is communicated with the through hole 22 of annular compartment 20 and air intake 2.This implementation offers multiple vapor-permeable holes 21 on stop valve bonnet 15,
The connection of air intake 2 and through hole 22 on pressure ring 19 is realized by vapor-permeable hole 21, so as to realize the company of annular compartment 20 and air intake 2
It is logical.Pressure ring 19 also has step-like central through hole, and stop valve valve rod 16 passes through the central through hole of pressure ring 19, and causes equalizing valve
Valve element is located in annular compartment 20 in which can axially move, and the central through hole of pressure ring 19 has the platform being engaged with valve core of pre-inlet valve
Terrace, step of the valve core of pre-inlet valve towards the end face and the cut-off stepped hole of valve core 17 of the diameter holes of the cut-off stepped hole of valve core 17
Closure or the cooperation opened are realized between face, to realize the cut-off of annular compartment 20 and diameter holes or connect, that is, annular is realized
The cut-off of chamber 20 and the valve seat orifice of valve seat 5 is connected.The present embodiment is provided with the step surface of the cut-off stepped hole of valve core 17
One equalizing valve valve seat, valve core of pre-inlet valve is towards between the end face and the equalizing valve valve seat of the diameter holes of the cut-off stepped hole of valve core 17
Realize closure or the cooperation opened.Preferably, the overall structure that the equalizing valve valve seat is formed in one with cut-off valve core 17.
By the setting of equalizing valve 3, when needing opening stop valve, pass through the mobile drive equalizing valve of stop valve valve rod 16
Valve element moves away equalizing valve valve seat so that opens equalizing valve 3 and first opens, and now the steam at air intake 2 is through stop valve bonnet 15
On vapor-permeable hole 21, the through hole 22 on pressure ring 19, annular compartment 20 and end the stepped hole of valve core 17 diameter holes be passed through valve
In the valve seat orifice of seat 5, so that cut-off valve core 17 is not subjected to pressure differential substantially.In valve core of pre-inlet valve props up pressure ring 19
After the step surface of heart through hole, stop valve valve rod 16 can drive cut-off valve core 17 to move and leave under the external force effect of very little
Valve seat 5, realizes the unlatching of stop valve.Thus the opening force of stop valve is substantially reduced so that operation is very easy.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and replacement can also be made, these change
Enter and replace and also should be regarded as protection domain of the present utility model.
Claims (10)
1. a kind of steam turbine integral type inlet valve, including valve casing (1), the valve casing (1) have axially disposed valve pocket
(100) air intake (2) and venthole (12) misplaced vertically, is offered in the cavity wall of the valve pocket (100), its feature exists
In, provided with coaxially arranged valve seat (5), shut-off valve assemblies (4) and valve assembly (6) in the valve pocket (100), the valve seat
(5) it is located between the air intake (2) and the venthole (12), the shut-off valve assemblies (4) are located at the air intake (2) side
And composition stop valve is engaged with the valve seat (5) and the valve casing (1), the valve assembly (6) is located at the venthole
(12) side and it is engaged composition regulating valve with the valve seat (5) and the valve casing (1).
2. steam turbine integral type inlet valve according to claim 1, it is characterised in that the valve assembly (6) includes
Located at the valve pocket (100) close to the regulating valve bonnet (10) of one end of the venthole (12), axially through the regulation
The regulating valve rod (13) of valve bonnet (10) and one end for being stretched into located at the regulating valve rod (13) in the valve pocket (100)
Regulation valve core (7), the regulation valve core (7) realizes closure or the cooperation opened with the valve seat (5).
3. steam turbine integral type inlet valve according to claim 2, it is characterised in that the valve seat orifice of the valve seat (5) with
One end that the regulation valve core (7) is engaged is in reaming shape, what the regulation valve core (7) was engaged with the valve seat (5)
End face is towards the raised conical surface of the valve seat (5).
4. steam turbine integral type inlet valve according to claim 3, it is characterised in that the valve seat orifice and the regulating valve
The angle of flare of one end that valve element (7) is engaged is 3 ° -10 °, the end that the regulation valve core (7) is engaged with the valve seat (5)
The face angle in face is 30 ° -60 °.
5. steam turbine integral type inlet valve according to claim 2, it is characterised in that the regulation valve core (7) and institute
State the connection of regulating valve bonnet (10) key.
6. steam turbine integral type inlet valve according to claim 2, it is characterised in that edge on the regulation valve core (7)
Axially offer pressure release through hole (11).
7. steam turbine integral type inlet valve according to claim 1, it is characterised in that the shut-off valve assemblies (4) include
Located at the valve pocket (100) close to the stop valve bonnet (15) of one end of the air intake (2), axially through the stop valve
The stop valve valve rod (16) of bonnet (15) and section of the one end stretched into located at the stop valve valve rod (16) in the valve pocket (100)
Only valve core (17), described to end the cooperation that valve core (17) is realized closure with the valve seat (5) or opened.
8. steam turbine integral type inlet valve according to claim 7, it is characterised in that the stop valve valve rod (16) and institute
State and be provided with equalizing valve (3) between cut-off valve core (17).
9. steam turbine integral type inlet valve according to claim 1, it is characterised in that the valve seat (5) and the valve casing
(1) single piece being formed in one.
10. steam turbine integral type inlet valve according to claim 1, it is characterised in that the valve seat (5) and the valve casing
(1) interference fit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621432704.7U CN206419487U (en) | 2016-12-23 | 2016-12-23 | Steam turbine integral type inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621432704.7U CN206419487U (en) | 2016-12-23 | 2016-12-23 | Steam turbine integral type inlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206419487U true CN206419487U (en) | 2017-08-18 |
Family
ID=59576214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621432704.7U Active CN206419487U (en) | 2016-12-23 | 2016-12-23 | Steam turbine integral type inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206419487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523716A (en) * | 2016-12-23 | 2017-03-22 | 上海电气电站设备有限公司 | Turbine integrated steam inlet valve |
-
2016
- 2016-12-23 CN CN201621432704.7U patent/CN206419487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523716A (en) * | 2016-12-23 | 2017-03-22 | 上海电气电站设备有限公司 | Turbine integrated steam inlet valve |
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