CN211116146U - Valve regulating mechanism of steam turbine - Google Patents
Valve regulating mechanism of steam turbine Download PDFInfo
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- CN211116146U CN211116146U CN201921400383.6U CN201921400383U CN211116146U CN 211116146 U CN211116146 U CN 211116146U CN 201921400383 U CN201921400383 U CN 201921400383U CN 211116146 U CN211116146 U CN 211116146U
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Abstract
A valve adjusting mechanism of a steam turbine relates to a valve adjusting mechanism, which comprises a steam chamber cover, a steam chamber shell, a valve rod sealing system and a valve disc component, wherein the steam chamber cover is fixed at the upper part of the steam chamber shell, the valve rod sealing system is respectively installed at two sides of the steam chamber cover, a cross beam is arranged in the steam chamber shell, the lower part of the valve rod sealing system is fixedly connected with the cross beam, a plurality of valve disc components connected with the steam chamber shell are arranged on the cross beam at intervals, each valve disc component comprises a nut A, a positioning pin, a positioning sleeve, a valve disc and a diffusion steam nozzle, a step hole penetrating through the cross beam at the upper end of the valve disc is arranged at the upper part of the cross beam, the positioning sleeve arranged on the step of the step hole of the cross beam is fixed at the outer part of the valve disc, the upper end of the valve disc is locked by the nut A, the positioning pin is arranged; the utility model discloses simple structure, the operation of being convenient for, and sealed effect is better.
Description
Technical Field
The utility model relates to a transfer the valve mechanism, especially relate to a transfer valve mechanism of steam turbine.
Background
It is known that, in the development of a low-power high-parameter steam turbine, a traditional steam turbine valve adjusting mechanism cannot meet design requirements, and nuts are easily loosened due to the influence of high temperature, so that a valve disc fixing mode generally does not adopt a double-nut fixing mode commonly used on a low-parameter steam turbine, but adopts a mode of connecting a special bolt and a valve disc through threads, a longitudinal pin is driven into the lower part of the valve disc after the idle stroke of each valve disc is adjusted, but in actual operation, the pin is loosened to cause the risk of falling of the valve disc, and the thread part where the bolt and the valve disc are connected is easy to form stress concentration, and is subjected to impact load in the operation process to cause a fracture phenomenon. On the other hand, the valve rod seal of the traditional steam turbine valve regulating mechanism is guaranteed by leaning on a valve rod to process a ring groove, leakage steam in operation is pumped out through a steam seal pipeline, the processing of the valve rod ring groove is not easy to guarantee, the leakage steam quantity can be increased, and the efficiency of a steam turbine is influenced.
Disclosure of Invention
In order to overcome the not enough in the background art, the utility model discloses a accent valve mechanism of steam turbine.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a valve adjusting mechanism of steam turbine, including the steam chamber cap, the steam chamber casing, valve rod sealing system and valve disc subassembly, the upper portion of steam chamber casing is fixed with the steam chamber cap, valve rod sealing system is installed respectively to the both sides of steam chamber cap, be equipped with the crossbeam in the steam chamber casing, valve rod sealing system's lower part and crossbeam fixed connection, the interval is equipped with a plurality of valve disc subassemblies of being connected with the steam chamber casing on the crossbeam, valve disc subassembly includes nut A, the locating pin, the position sleeve, valve disc and diffusion steam cock, the step hole that the crossbeam was penetrated to the valve disc upper end sets up the upper portion at the crossbeam, the position sleeve that sets up on crossbeam step hole step is fixed in the outside of valve disc, nut A locking is passed through to the upper end of valve disc, the locating pin sets up inside valve disc up the up end, the valve disc lower extreme cooperatees the setting.
The valve regulating mechanism of the steam turbine is characterized in that a diffusion steam nozzle is arranged in an inner surface hole at the lower part of a steam chamber shell.
The accent valvetrain of steam turbine, the valve rod sealing system includes the valve rod, the gland, the bush, gland ring and bush, the step hole of steam chamber lid is worn to establish by the valve rod, install the gland sleeve on the step in step hole, in the gland sleeve and at the externally mounted on valve rod upper portion graphite packing, upper portion and lower part at graphite packing all are equipped with the axle sleeve, the bush sets up the upper portion at the upper portion axle sleeve, be fixed with the gland on the up end of bush, the stack is equipped with a plurality of gland rings from top to bottom between the lower part hole in step hole and the valve rod lower part, the bush sets up the lower part at the lower extreme in step hole and be located lower part gland ring, the lower extreme of valve rod is installed in the through-hole of crossbeam and is fixed through lock nut.
In the valve adjusting mechanism of the steam turbine, the flange end at the upper part of the steam seal sleeve is arranged on the upper end surface of the steam chamber cover, the gland is fixedly connected with the flange end at the upper part of the steam seal sleeve through the stud, and the stud between the gland and the nut B at the upper end of the stud is provided with the belleville spring.
The valve adjusting mechanism of the steam turbine is characterized in that a steam leakage interface is arranged on the steam seal sleeve.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the valve adjusting mechanism of the steam turbine has the advantages that the valve disc is simple in structure, the idle stroke adjusting operation is easy, the positioning pin is driven from the upper part of the valve disc and is not easy to fall off, and the operation safety of a unit is improved; the valve rod sealing structure is sealed by the graphite packing, so that the processing difficulty of the valve rod is greatly reduced, the processing precision is easy to guarantee, the sealing effect is good, zero steam leakage of a valve rod gap can be realized after the graphite packing is compressed, and the operation efficiency of a unit is improved; the utility model discloses simple structure, the operation of being convenient for, and sealed effect is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the valve disc of the present invention;
FIG. 3 is a schematic structural view of the valve stem sealing system of the present invention;
in the figure: 1. a valve stem sealing system; 2. a steam chamber cover; 3. a valve disc assembly; 4. a cross beam; 5. a steam chamber housing; 6. a nut A; 7. positioning pins; 8. a positioning sleeve; 9. a valve disc; 10. a diffusion steam nozzle; 11. a stud; 12. a nut B; 13. a disc spring; 14. a gland; 15. a bushing; 16. a shaft sleeve; 17. graphite packing; 18. a gland sealing sleeve; 19. a gland sealing ring; 20. a bushing; 21. a valve stem.
Detailed Description
The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.
The valve adjusting mechanism of the steam turbine described in conjunction with the attached drawings 1-3 comprises a steam chamber cover 2, a steam chamber shell 5, a valve rod sealing system 1 and a valve disc component 3, wherein the steam chamber cover 2 is fixed on the upper part of the steam chamber shell 5, the valve rod sealing system 1 is respectively installed on two sides of the steam chamber cover 2, a beam 4 is arranged in the steam chamber shell 5, the lower part of the valve rod sealing system 1 is fixedly connected with the beam 4, a plurality of valve disc components 3 connected with the steam chamber shell 5 are arranged on the beam 4 at intervals, the valve disc component 3 comprises a nut A6, a positioning pin 7, a positioning sleeve 8, a valve disc 9 and a diffusion steam nozzle 10, the upper end of the valve disc 9 penetrates through a step hole of the beam 4 and is arranged on the upper part of the beam 4, the positioning sleeve 8 arranged on the step hole step of the beam 4 is fixed on the outer part of the valve disc 9, the upper end of the valve disc 9 is locked by, the lower end of the valve disc 9 is matched with the upper port of the inner taper hole of the diffusion steam nozzle 10.
In the valve regulating mechanism of the steam turbine, a diffusion steam nozzle 10 is arranged in an inner surface hole at the lower part of a steam chamber shell 5.
The valve adjusting mechanism of the steam turbine, the valve stem sealing system 1 comprises a valve stem 21, a gland 14, a bushing 15, a gland seal ring 19 and a bushing 20, the valve stem 21 is arranged in a step hole of a steam chamber cover 2 in a penetrating mode, a gland seal sleeve 18 is arranged on the step of the step hole, a graphite packing 17 is arranged in the gland seal sleeve 18 and outside the upper portion of the valve stem 21, shaft sleeves 16 are arranged on the upper portion and the lower portion of the graphite packing 17, the bushing 15 is arranged on the upper portion of the upper portion shaft sleeve 16, the gland 14 is fixed on the upper end face of the bushing 15, a plurality of gland seal rings 19 are arranged between the lower portion hole of the step hole and the lower portion of the valve stem 21 in an up-and-down overlapping mode, the bushing 20 is arranged at the lower end of the step hole and located at the lower portion of the lowermost gland seal ring 19.
In the valve adjusting mechanism of the steam turbine, the flange end at the upper part of the steam seal sleeve 18 is arranged on the upper end surface of the steam chamber cover 2, the gland 14 is fixedly connected with the flange end at the upper part of the steam seal sleeve 18 through the stud 11, and the disc spring 13 is arranged on the stud 11 between the gland 14 and the nut B12 at the upper end of the stud 11.
The valve adjusting mechanism of the steam turbine is provided with an air leakage interface on a steam seal sleeve 18.
When the valve adjusting mechanism of the steam turbine is implemented, when the valve disc assembly 3 is installed, the ground diffusion steam nozzle 10 is installed in the steam chamber shell 5, each positioning sleeve 8 is ground according to the idle stroke of each valve disc 9, the positioning sleeves are threaded on the valve discs 9 and then screwed into the top ends of the valve discs 9 through nuts A6, and the positioning pins 7 are longitudinally driven after being screwed down; when the valve rod sealing system 1 is installed, a valve rod 21 is installed in a steam chamber cover 2 provided with a bush 20, then steam seal rings 19 are sequentially installed, 6 steam seal grooves are processed on each steam seal ring 19 to play a sealing role, a steam seal sleeve 18, a shaft sleeve 16, a graphite packing 17, the shaft sleeve 16, a bush 15 and a gland 14 are sequentially installed, the graphite packing 17 is compressed by screwing a nut B12 during assembly, the initial compression amount is 30% of the thickness of the graphite packing 17, a steam leakage interface is reserved on the steam seal sleeve 18, when a unit operates on site, the nut B12 can be adjusted to continuously compress the graphite packing 17 by detecting whether steam leakage exists at the steam leakage interface, the maximum compression amount of the graphite packing 17 is 45% -50% of the thickness of the graphite packing, and complete sealing of the valve rod 21 is finally guaranteed.
The part of the utility model not detailed is prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and the utility model.
Claims (5)
1. The utility model provides a valve adjusting mechanism of steam turbine, includes steam chamber lid, steam chamber casing, valve rod sealing system and valve disc subassembly, characterized by: the upper portion of steam chamber casing is fixed with the steam chamber lid, the valve rod sealing system is installed respectively to the both sides of steam chamber lid, be equipped with the crossbeam in the steam chamber casing, valve rod sealing system's lower part and crossbeam fixed connection, the interval is equipped with a plurality of valve disc subassemblies of being connected with the steam chamber casing on the crossbeam, valve disc subassembly includes nut A, the locating pin, the position sleeve, valve disc and diffusion steam cock, the step hole that the valve disc upper end penetrated the crossbeam sets up the upper portion at the crossbeam, the outside at the valve disc is fixed to the position sleeve that sets up on crossbeam step hole step, nut A locking is passed through to the upper end of valve disc, the locating pin sets up inside valve disc up the up end, the valve disc lower extreme cooperatees the setting with the last port of diffusion steam.
2. The valve regulating mechanism for a steam turbine as claimed in claim 1, wherein: the diffusion steam nozzle is arranged in the inner surface hole at the lower part of the steam chamber shell.
3. The valve regulating mechanism for a steam turbine as claimed in claim 1, wherein: the valve rod sealing system comprises a valve rod, a gland, a bushing, a gland ring and a bushing, wherein the valve rod is arranged in a step hole of a steam chamber cover in a penetrating mode, a gland sleeve is arranged on the step of the step hole, a graphite packing is arranged in the gland sleeve and outside the upper portion of the valve rod, shaft sleeves are arranged on the upper portion and the lower portion of the graphite packing, the bushing is arranged on the upper portion of the upper portion shaft sleeve, the gland is fixed on the upper end face of the bushing, a plurality of gland rings are arranged between the lower portion hole of the step hole and the lower portion of the valve rod in an up-and-down overlapping mode, the bushing is arranged at the lower end of the step hole and located on the lower portion of the lowermost gland ring, and the lower end of.
4. A valve operating mechanism for a steam turbine according to claim 3, wherein: the flange end of the upper part of the steam sealing sleeve is arranged on the upper end surface of the steam chamber cover, the gland is fixedly connected with the flange end of the upper part of the steam sealing sleeve through a stud, and a disc spring is arranged on the stud between the gland and a nut B at the upper end of the stud.
5. A valve operating mechanism for a steam turbine according to claim 3, wherein: and a gas leakage interface is arranged on the steam seal sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921400383.6U CN211116146U (en) | 2019-08-27 | 2019-08-27 | Valve regulating mechanism of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921400383.6U CN211116146U (en) | 2019-08-27 | 2019-08-27 | Valve regulating mechanism of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211116146U true CN211116146U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921400383.6U Active CN211116146U (en) | 2019-08-27 | 2019-08-27 | Valve regulating mechanism of steam turbine |
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| CN (1) | CN211116146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855291A (en) * | 2021-01-19 | 2021-05-28 | 沂源县华阳能源设备有限公司 | Improved cylinder |
| RU2757469C1 (en) * | 2021-04-22 | 2021-10-18 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Control valve for steam turbines with zero steam leakage along the stem at fully open |
-
2019
- 2019-08-27 CN CN201921400383.6U patent/CN211116146U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855291A (en) * | 2021-01-19 | 2021-05-28 | 沂源县华阳能源设备有限公司 | Improved cylinder |
| RU2757469C1 (en) * | 2021-04-22 | 2021-10-18 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Control valve for steam turbines with zero steam leakage along the stem at fully open |
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