CN203383863U - AST filter screen system of steam turbine - Google Patents
AST filter screen system of steam turbine Download PDFInfo
- Publication number
- CN203383863U CN203383863U CN201320477168.2U CN201320477168U CN203383863U CN 203383863 U CN203383863 U CN 203383863U CN 201320477168 U CN201320477168 U CN 201320477168U CN 203383863 U CN203383863 U CN 203383863U
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- CN
- China
- Prior art keywords
- filter screen
- cover
- chassis
- case
- ast
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides an AST filter screen system of a steam turbine. The AST filter screen system comprises a cover, an inlet conduit, an outlet conduit and a stainless steel wire filter screen. The cover is a hollow cylinder, one end of the cover is connected with a chassis through a cover flange, and the other end of the cover is connected with a weld blind in an argon arc welding mode. The inlet conduit is connected to one side, far from the cover, of the chassis. The outlet conduit is also connected to one side, far from the cover, of the chassis, and the outlet conduit and the inlet conduit are communicated with the cover. The stainless steel wire filter screen is arranged in the cover and arranged at the connecting position of the outlet conduit and the chassis in a covering mode, so that oil liquid passing through the inlet conduit needs to firstly pass through the filter screen and then enter the outlet conduit. The stainless steel wire filter screen is adopted for filtering, so that the damping effect generated by filtering of the filter screen is reduced in a high limit mode, oil pressure and the quantity of flows are rapidly compensated, and the requirement for running within a normal range of oil pressure is met.
Description
Technical field
The utility model relates to a kind of filtrating equipment, particularly a kind of steam turbine AST screen system.
Background technique
After the through-flow transformation of steam turbine, the overspeed protection of regulating system OPC(steam turbine), AST(steam turbine emergency shutdown protection) system needs oil sources after filtering to realize the function of control principle.Because the system pipeline design is unreasonable; cause the unit shutdown that causes the accident when actual removal of load; reason is that two systems are all taken from the oil sources after same fine filter filters; damping effect due to the filter element generation; during above-mentioned OPC system acting draining; this system oil pressure all descends, and causes AST due to the low fuel pressure emergency trip system acting emergency shutdown that links, and this defect must be eliminated.
PALL company 8674 series " centreless " that existing AST system is used are the switch filtering device online.Due to the existence of system filter core, the pressure release after the OPC system acting of the turbine oil after filtration, because filter element filtering produces certain damping effect.Oil pressure after filter core can not be supplemented in time and cause female pipe oil pressure to reduce, and triggers thus AST solenoid valve action draining and shuts down.Therefore, when a large amount of draining of this system, compensating flowrate and can cause main-piping pressure to reduce causing emergency shutdown rapidly.
Supply with separately the AST system-specific therefore be necessary to work out a set of filter screen, to overcome above-mentioned defect, the research and development of the inventor based on association area, and through constantly test and improvement, and then generation of the present utility model is arranged.
The model utility content
The purpose of this utility model is to provide a kind of steam turbine AST screen system, adopt the Stainless Steel Wire net filtration, the damping effect that minimizing strainer filtering that can larger limit produces, can make oil pressure, flow be compensated rapidly, to meet oil pressure, operates in the requirement in normal range (NR).
For reaching above-mentioned purpose, the utility model provides a kind of steam turbine AST screen system, and it comprises:
Case, be the cylinder of hollow, and the one end is connected with chassis by the case flange, and the other end of case adopts argon arc welding to be connected with the welding closure plate;
Entry conductor, be connected in the side of chassis away from case;
Delivery channel, be connected in the side of chassis away from case, and delivery channel all is connected with case with entry conductor;
The Stainless Steel Wire filter screen, be located in case and cover at the joint on delivery channel and chassis, makes fluid by entry conductor need to pass through filter screen and just can enter into delivery channel.
Described steam turbine AST screen system, wherein, described delivery channel adopts respectively welding manner to be connected with chassis with entry conductor.
Described steam turbine AST screen system, wherein, described case is connected by welding manner with the case flange.
Described steam turbine AST screen system, wherein, the dirty area of receiving of described filter screen is not less than 70 times of device for cleaning pipeline flow area of delivery channel.
The beneficial effects of the utility model are: adopt the Stainless Steel Wire net filtration, the minimizing of larger limit the damping effect that produces of strainer filtering, can make oil pressure, flow be compensated rapidly, operate in the requirement in normal range (NR) to meet oil pressure.Just can be cleared up maintenance and maintenance cost that the later stage has reduced between turn(a)round.
The accompanying drawing explanation
The structural representation that Fig. 1 is steam turbine AST screen system of the present utility model.
Description of reference numerals: 1-delivery channel; The 2-chassis; 3-case flange; The 4-filter screen; The 5-case; 6-welds closure plate; The 7-entry conductor.
Embodiment
About the utility model is the application target that reaches above-mentioned and effect and the technological means that adopts, now enumerate better feasible embodiment, and coordinate shown in accompanying drawing, details are as follows:
At first as shown in Figure 1, be the structural representation of steam turbine AST screen system of the present utility model.Described steam turbine AST screen system mainly comprises delivery channel 1, chassis 2, case flange 3, filter screen 4, case 5, welding closure plate 6 and entry conductor 7.
The cylinder that described case 5 is hollow, the one end is connected with chassis 2 by case flange 3, the other end of case 5 adopts argon arc welding to be connected with welding closure plate 6, needs after welding to guarantee that case 5 is bright and clean without welding slag with the inwall of welding closure plate 6, and need be qualified through the flaw detection of metallographic chamber.Case 5 also can be connected by welding manner with case flange 3, processing sealing surface after welding, and each sealing surface must be bright and clean smooth without distortion.
Described chassis 2 is connected with delivery channel 1 and entry conductor 7 away from a side of case 5, and delivery channel 1 all is connected with case 5 with entry conductor 7.Wherein, described delivery channel 1 can adopt respectively welding manner to be connected with chassis 2 with entry conductor 7, processing sealing surface after welding, and each sealing surface must be bright and clean smooth without distortion.
Be provided with filter screen 4 in described case 5, described filter screen 4 covers at the joint on delivery channel 1 and chassis 2, makes the fluid by entry conductor 7 just can enter into delivery channel 1 through filter screen 4.
Described filter screen 4 can be selected the Stainless Steel Wire filter screen.Adopt the Stainless Steel Wire net filtration, the minimizing of larger limit the damping effect that produces of strainer filtering, can make oil pressure, flow be compensated rapidly, operate in the requirement in normal range (NR) to meet oil pressure.The dirty area of receiving of filter screen 4 is not less than 70 times of device for cleaning pipeline flow area of delivery channel 1, that is, the long-pending ratio with the pipeline drift diameter sectional area of screen surface is not less than 70.
After arranging filter screen 4, oil has obtained further filtration, according to its performance characteristic---and not frequent movement in service can meet the service condition in the light maintenance cycle.Filter screen is in use respond well after installing, and during test, various functions realizes that normally, this filter screen has been applied to site safety and has moved so far approximately 8 years.Adopt Stainless Steel Wire strainer filtering oil, just can be cleared up between turn(a)round, maintenance and maintenance cost that the later stage has reduced.
Above is illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within the spirit limited in claim and scope, but they all will fall in protection domain of the present utility model.
Claims (4)
1. a steam turbine AST screen system, is characterized in that, comprising:
Case, be the cylinder of hollow, and the one end is connected with chassis by the case flange, and the other end of case adopts argon arc welding to be connected with the welding closure plate;
Entry conductor, be connected in the side of chassis away from case;
Delivery channel, also be connected in the side of chassis away from case, and delivery channel all is connected with case with entry conductor;
The Stainless Steel Wire filter screen, be located in case and cover at the joint on delivery channel and chassis, makes fluid by entry conductor need to pass through the Stainless Steel Wire filter screen and just can enter into delivery channel.
2. steam turbine AST screen system according to claim 1, is characterized in that, described delivery channel adopts respectively welding manner to be connected with chassis with entry conductor.
3. steam turbine AST screen system according to claim 1, is characterized in that, described case is connected by welding manner with the case flange.
4. steam turbine AST screen system according to claim 1, is characterized in that, the dirty area of receiving of described Stainless Steel Wire filter screen is not less than 70 times of device for cleaning pipeline flow area of delivery channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320477168.2U CN203383863U (en) | 2013-08-06 | 2013-08-06 | AST filter screen system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320477168.2U CN203383863U (en) | 2013-08-06 | 2013-08-06 | AST filter screen system of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203383863U true CN203383863U (en) | 2014-01-08 |
Family
ID=49872372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320477168.2U Expired - Lifetime CN203383863U (en) | 2013-08-06 | 2013-08-06 | AST filter screen system of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203383863U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798803A (en) * | 2018-06-29 | 2018-11-13 | 神华国华广投（柳州）发电有限责任公司 | A kind of device that small machine adjusting oil screen realization switches online |
-
2013
- 2013-08-06 CN CN201320477168.2U patent/CN203383863U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798803A (en) * | 2018-06-29 | 2018-11-13 | 神华国华广投（柳州）发电有限责任公司 | A kind of device that small machine adjusting oil screen realization switches online |
| CN108798803B (en) * | 2018-06-29 | 2023-11-21 | 国能广投柳州发电有限公司 | Device for realizing on-line switching of small machine oil adjusting filter screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |