CN2934585Y - Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine - Google Patents
Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine Download PDFInfo
- Publication number
- CN2934585Y CN2934585Y CN 200620044039 CN200620044039U CN2934585Y CN 2934585 Y CN2934585 Y CN 2934585Y CN 200620044039 CN200620044039 CN 200620044039 CN 200620044039 U CN200620044039 U CN 200620044039U CN 2934585 Y CN2934585 Y CN 2934585Y
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- expansion joint
- steam inlet
- flange
- cylinder
- welded
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- Expired - Lifetime
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to a sealing device for steam turbine low-pressure steam inlet inner and outer cylinder. A sealing device for steam turbine low-pressure steam inlet internal and external cylinder expansion joint is characterized in that the sealing device includes a tube-shaped expansion joint, a flange is welded on the upper part of the expansion joint and a cylinder is welded on the outer surface of the lower part of the tube-shaped expansion joint; the tube-shaped expansion joint is packaged on the low-pressure steam inlet, the upper flange of the expansion joint is arranged between the flange of the steam inlet of inner cylinder and the flange of the communicating tube and the lower cylinder of the expansion joint is welded on the internal wall of steam inlet of the outer cylinder. The utility model can improve sealing performance of steam inlet and allowable expansion displacement value between the inner cylinder and the outer cylinder and has low requirement for the installation space of the steam inlet, with simple installation, processing and manufacturing convenience and safe and reliable usage.
Description
(1) technical field
The utility model relates to outer shell seal arrangement in the steam turbine low-pressure steam inlet.
(2) background technique
For the Large Steam Turbine Sets low pressure (LP) cylinder, middle pressure vapour passes outer shell and enters the inner casing steam inlet through cross over pipe.Generally adopt cross over pipe directly fixing, but do not go, must between interior outer shell, couple together with seal arrangement for the air that guarantees external environment condition does not leak in the interior outer shell interlayer by flange and the butt joint of inner casing steam inlet.Outer shell steam inlet when cold conditions and hot work has certain relative shift with respect to cold conditions in considering, so seal arrangement must have enough flexibilities to guarantee to absorb interior outer shell relative deformation.
Existing steam turbine is a π shape seal diaphragm 4 as the seal arrangement of outer shell in 300MW, the 600MW steam turbine, referring to Fig. 1.It is welded into ring-type π shape by sheet metal, and one is fixed on the outer shell flange 5 with bolt 2, and one is fixed on the inner casing steam inlet flange 1.The cold drawn seal diaphragm of thermal expansion difference of the interior outer shell steam inlet position that obtains according to theoretical calculation during installation is also dead with bolt, offsets cold drawn prestressing force to guarantee unit in the hot back of expanding, thereby guarantees that the seal diaphragm working stress is in allowed band.This sealing configuration, easily produces and leaks the vapour phenomenon so the distortion of flange can influence its sealability because seal diaphragm uses the form of flange and bolt to be connected with outer shell.Simultaneously sealing plate twists with upper steel plate by five and is welded, and the distortion that processed complex and welding produce also can have influence on the sealability of structure.When mounted owing to need be cold drawn to design load, relatively difficulty operates also simultaneously.
(3) summary of the invention
The purpose of this utility model is to provide outer shell expansion joint seal arrangement in a kind of steam turbine low-pressure steam inlet, this expansion joint seal arrangement can improve the sealability of steam inlet and the permission expansion displacement value between the interior outer shell, its requirements of installation space to steam inlet is low, install simple, convenient processing and manufacture, safe and reliable.
The utility model is achieved in that outer shell expansion joint seal arrangement in a kind of steam turbine low-pressure steam inlet, it is characterized in that comprising the tubular expansion joint, is welded with flange on tubular expansion joint top, and tubular expansion joint lower external face is welded with cylinder; The tubular expansion joint is sleeved on the low pressure admission mouth, and the expansion joint upper flange is installed between inner casing steam inlet flange and the cross over pipe flange, and expansion joint bottom cylinder is welded on the outer shell steam inlet inwall.
The utility model adopts tubular expansion joint seal arrangement that low-pressure internal cylinder and lp outer casing are coupled together, and has improved the sealability of steam turbine low-pressure steam inlet and the permission expansion displacement value between the interior outer shell.Compare original π shape seal diaphragm, this tubular expansion joint seal arrangement has better absorption deformation effect; Being connected to weld alternative flange with the outer shell joint, reach better sealing effect on the one hand, also reduced simultaneously to connect and has used bolt.Owing to the tubular expansion joint has been adopted prior compression and with the fixing method of pull bar, has saved cold drawing process when installing at the scene, made that installation is more simple and convenient.Because littler, has better applicability on the less unit of the utility model installing space around the low pressure admission mouth than seal diaphragm radial dimension.
The utility model is low to the requirements of installation space of steam inlet, installs simply, and its convenient processing and manufacture, safe and reliable.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is an outer shell seal diaphragm structural representation in the existing steam turbine low-pressure steam inlet;
Fig. 2 is an outer shell expansion joint schematic diagram of sealing device in the utility model steam turbine low-pressure steam inlet.
Among the figure: 1 low-pressure internal cylinder steam inlet flange, 2 bolts, 3 cross over pipes, 4 seal diaphragms, 5 lp outer casing flanges, 6 lp outer casings, 7 cross over pipe flanges, 8 expansion joint flanges, 9 cylindric expansion joints, 10 cylinders.
(5) embodiment
Referring to Fig. 2, outer shell expansion joint seal arrangement in a kind of steam turbine low-pressure steam inlet comprises cylindric expansion joint 9, is welded with flange 8 on tubular expansion joint 9 tops, and tubular expansion joint 9 lower external face are welded with a bigger cylinder 10.Tubular expansion joint 9 is sleeved on the low pressure admission mouth, and expansion joint upper flange 8 is installed between inner casing steam inlet flange 1 and the cross over pipe flange 7, and expansion joint bottom cylinder 10 is welded on the outer shell 6 steam inlet inwalls.
The main body of outer shell expansion joint seal arrangement is cylindric corrugated expansion joint structure in the steam turbine low-pressure steam inlet.This structure is used in pipeline more and connects, and absorbs the distortion of piping, is ripe flexible connecting structure.Corrugated expansion joint normally by the direct press forming of which floor sheet metal, do not have many weld seams, and machine shaping is very convenient.
Behind the interior outer shell differential expansion value compression-expansion joint that outer shell expansion joint seal arrangement can absorb as required in the utility model steam turbine low-pressure steam inlet, indeformable when fixing with the assurance transportation with pull bar.Removing pull bar after with the seal arrangement installation just can make expansion joint enter working state.
The utility model is low to the requirements of installation space of steam inlet, installs simply, and its convenient processing and manufacture, safe and reliable.
Claims (1)
1. the interior outer shell expansion joint seal arrangement of steam turbine low-pressure steam inlet is characterized in that comprising the tubular expansion joint, is welded with flange on tubular expansion joint top, and tubular expansion joint lower external face is welded with cylinder; The tubular expansion joint is sleeved on the low pressure admission mouth, and the expansion joint upper flange is installed between inner casing steam inlet flange and the cross over pipe flange, and expansion joint bottom cylinder is welded on the outer shell steam inlet inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620044039 CN2934585Y (en) | 2006-07-19 | 2006-07-19 | Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620044039 CN2934585Y (en) | 2006-07-19 | 2006-07-19 | Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2934585Y true CN2934585Y (en) | 2007-08-15 |
Family
ID=38351275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620044039 Expired - Lifetime CN2934585Y (en) | 2006-07-19 | 2006-07-19 | Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2934585Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500157A (en) * | 2014-12-29 | 2015-04-08 | 东方电气集团东方汽轮机有限公司 | Low-pressure cylinder of steam turbine |
| CN105547005A (en) * | 2016-01-14 | 2016-05-04 | 大唐(北京)能源管理有限公司 | Large-size thin-wall connector butt welding structure and method |
-
2006
- 2006-07-19 CN CN 200620044039 patent/CN2934585Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500157A (en) * | 2014-12-29 | 2015-04-08 | 东方电气集团东方汽轮机有限公司 | Low-pressure cylinder of steam turbine |
| CN105547005A (en) * | 2016-01-14 | 2016-05-04 | 大唐(北京)能源管理有限公司 | Large-size thin-wall connector butt welding structure and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang District: 201100 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070815 |
|
| EXPY | Termination of patent right or utility model |