CN208935436U - A kind of low side valve door of steam turbine - Google Patents
A kind of low side valve door of steam turbine Download PDFInfo
- Publication number
- CN208935436U CN208935436U CN201821749187.5U CN201821749187U CN208935436U CN 208935436 U CN208935436 U CN 208935436U CN 201821749187 U CN201821749187 U CN 201821749187U CN 208935436 U CN208935436 U CN 208935436U
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- Prior art keywords
- valve
- spool
- sealing surface
- seat
- steam turbine
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Abstract
The utility model discloses a kind of low side valve doors of steam turbine, including valve body, the top center position of the valve body is provided with valve deck, and the left and right sides of valve body have been symmetrically arranged medium flow field through-hole, the middle position of the valve deck is provided with valve rod, and spool is provided with below the valve rod, and the spool is provided with valve core sealed cover far from the side of valve rod, valve seat is provided with below the spool, the valve seat is provided with sealing surface of seat close to the side of spool；The utility model will be changed to plane directly facing the valve core sealed cover of erosion air-flow originally; valve seat is also changed to plane simultaneously, and (width is about 3--4mm; it is determined according to closing forces); it can be seen that sealing surface from original in spool side after transformation; it has been moved to below spool; high velocity vapor containing water droplet is directly impacted on the sealing surface that spool side does not impact below spool, therefore can be very good that sealing surface is protected not damaged by water erosion, because without causing to reveal.
Description
Technical field
The utility model belongs to steam turbine accessory technical field, and in particular to a kind of low side valve door of steam turbine.
Background technique
Steam turbine is a kind of rotary power machinery that the energy of steam is converted into mechanical work, in usually use process
In in order to coordinate the operation of machine furnace, improve the characteristic of on-load under complete machine entry condition and unit difference operating condition, adapt to quick
Lifting load enhances the flexibility of unit, and a set of turbine bypass system is all arranged in every Steam Turbine, and low side valve door is
Important component in turbine bypass system, although existing steam turbine is being becoming better and approaching perfection day by day with the production technology of low side valve door,
Still there is part deficiency to be modified.
The steam turbine of the prior art is had the following problems with low side valve door: 1, moisture-resistant steam impurities erosion ability is weaker, warp
The problem of causing sealing face damage due to water erosion or oxide skin and other impurities and leading to leakage often occurs；2, due to this
The seal form of valve determines that this type of valve can only slow down sealing face damage by reinforcing the water erosion resistent ability at sealing surface,
Specific way is the built-up welding water erosion resistent alloy at sealing surface, but the effect is unsatisfactory from the point of view of protracted experience, however it remains a large amount of
Water erosion causes the case where valve leak, therefore causes power plant to lose a large amount of high energy steams, and then lead to decrease of power generation, unit
Energy consumption increases.
Utility model content
To solve the problems mentioned above in the background art.The utility model provides a kind of low side valve door of steam turbine,
Have the characteristics that sealing surface is protected not damaged by water erosion.
To achieve the above object, the utility model provides the following technical solutions: a kind of steam turbine low side valve door, including valve
Body, the top center position of the valve body is provided with valve deck, and the left and right sides of valve body have been symmetrically arranged flow of media
Hole, the middle position of the valve deck are provided with valve rod, and spool, side of the spool far from valve rod are provided with below the valve rod
While being provided with valve core sealed cover, valve seat is provided with below the spool, the valve seat is provided with valve seat close to the side of spool
Sealing surface.
Preferably, the medium flow field through-hole is cylindrical structure.
Preferably, the aperture of the medium flow field through-hole is 2mm.
Preferably, the width of the valve core sealed cover and sealing surface of seat is about 3-4mm.
Preferably, the sealing surface of seat is pile-up welding hard alloy material members.
Preferably, the valve seat is 92F material members.
Preferably, the spool is 91F pile-up welding hard alloy material members.
Compared with prior art, the utility model has the beneficial effects that
1, the utility model will be changed to plane directly facing the valve core sealed cover of erosion air-flow originally, and valve seat is also changed to simultaneously
Plane (width is about 3--4mm, is determined according to closing forces) can be seen that sealing surface from original in spool side, quilt after transformation
Spool has been moved on in the following, the high velocity vapor containing water droplet, which is directly impacted, does not impact the sealing surface below spool in spool side
On, therefore can be very good that sealing surface is protected not damaged by water erosion, because without causing to leak.
2, the utility model cuts off the small valve cage below original spool, in this way can also be fine in the case where small guide vane
Improvement valve seat erosion situation, guarantee that spool and valve seat injure without water erosion and cause valve during normal operation in two years
Interior stream, avoid power plant lose a large amount of high energy steams the case where generation, and then improve generating efficiency, specific energy consumption reduce.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the utility model valve core sealed cover and sealing surface of seat positional relationship.
In figure: 1, valve deck；2, valve rod；3, medium flow field through-hole；4, valve core sealed cover；5, sealing surface of seat；6, valve seat；7, valve
Core；8, valve body.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model is the following technical schemes are provided: a kind of steam turbine low side valve door, including valve body referring to FIG. 1-2,
8, the top center position of valve body 8 is provided with valve deck 1, and the left and right sides of valve body 8 have been symmetrically arranged medium flow field through-hole
3, the middle position of valve deck 1 is provided with valve rod 2, and the lower section of valve rod 2 is provided with spool 7, and spool 7 is arranged far from the side of valve rod 2
There is valve core sealed cover 4, the lower section of spool 7 is provided with valve seat 6, and valve seat 6 is provided with sealing surface of seat 5 close to the side of spool 7.
In order to facilitate flow of media, in the present embodiment, it is preferred that medium flow field through-hole 3 is cylindrical structure.
In order to reduce carbonated drink pressure to the dynamics of washing away that mitigates carbonated drink to medium flow field through-hole 3, in the present embodiment, preferably
, the aperture of medium flow field through-hole 3 is 2mm.
In order to preferably work, in the present embodiment, it is preferred that the width of valve core sealed cover 4 and sealing surface of seat 5 is about 3-
4mm。
In order to extend the service life of sealing surface of seat 5, in the present embodiment, it is preferred that sealing surface of seat 5 is built-up welding hard
Alloy material component.
In order to extend the service life of valve seat 6, in the present embodiment, it is preferred that valve seat 6 is F92 material members.
In order to extend the service life of spool 7, in the present embodiment, it is preferred that spool 7 is F91 pile-up welding hard alloy material
Component.
The working principle and process for using of the utility model: the utility model by original valve core sealed cover 4, valve seat 6 with
And sealing surface of seat 5 is changed to plane simultaneously, improved valve core sealed cover 4, in 7 side of spool, has been moved to spool from original
7 in the following, the design of such structure can allow the high velocity vapor containing water droplet directly to be impacted in 7 side of spool, without impacting valve
It on valve core sealed cover 4 below core 7, therefore can be very good that valve core sealed cover 4 is protected not damaged by water erosion, the utility model is most
Limits remain the structure type advantage of original spool 7, and influence very little to valve flow characteristic, can also be right well
Valve core sealed cover 4 accomplishes that water erosion is protected, and guarantees that valve seat 6 and spool 7 are injured without water erosion and made during normal operation in two years
At being flowed in valve, avoid power plant lose a large amount of high energy steams the case where generation, and then improve generating efficiency, specific energy consumption reduce.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of low side valve door of steam turbine, including valve body (8), it is characterised in that: the top center position of the valve body (8) is set
It is equipped with valve deck (1), and the left and right sides of valve body (8) have been symmetrically arranged medium flow field through-hole (3), in the valve deck (1)
Meta position, which installs, to be equipped with valve rod (2), is provided with spool (7) below the valve rod (2), side of the spool (7) far from valve rod (2)
While being provided with valve core sealed cover (4), it is provided with valve seat (6) below the spool (7), the valve seat (6) is close to spool (7)
Side is provided with sealing surface of seat (5).
2. the low side valve door of steam turbine according to claim 1, it is characterised in that: the medium flow field through-hole (3) is cylinder
Shape structure.
3. the low side valve door of steam turbine according to claim 1, it is characterised in that: the aperture of the medium flow field through-hole (3)
For 2mm.
4. the low side valve door of steam turbine according to claim 1, it is characterised in that: the valve core sealed cover (4) and valve seat
The width of sealing surface (5) is about 3-4mm.
5. the low side valve door of steam turbine according to claim 1, it is characterised in that: the sealing surface of seat (5) is built-up welding
Hard alloy material members.
6. the low side valve door of steam turbine according to claim 1, it is characterised in that: the valve seat (6) is F92 material structure
Part.
7. the low side valve door of steam turbine according to claim 1, it is characterised in that: the spool (7) is F91 built-up welding hard
Alloy material component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821749187.5U CN208935436U (en) | 2018-10-26 | 2018-10-26 | A kind of low side valve door of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821749187.5U CN208935436U (en) | 2018-10-26 | 2018-10-26 | A kind of low side valve door of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208935436U true CN208935436U (en) | 2019-06-04 |
Family
ID=66726117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821749187.5U Active CN208935436U (en) | 2018-10-26 | 2018-10-26 | A kind of low side valve door of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208935436U (en) |
-
2018
- 2018-10-26 CN CN201821749187.5U patent/CN208935436U/en active Active
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| GR01 | Patent grant |