CN201209708Y - Steam changeover valve for steam turbine by-path system - Google Patents
Steam changeover valve for steam turbine by-path system Download PDFInfo
- Publication number
- CN201209708Y CN201209708Y CNU2008200750173U CN200820075017U CN201209708Y CN 201209708 Y CN201209708 Y CN 201209708Y CN U2008200750173 U CNU2008200750173 U CN U2008200750173U CN 200820075017 U CN200820075017 U CN 200820075017U CN 201209708 Y CN201209708 Y CN 201209708Y
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- Prior art keywords
- valve
- steam
- valve body
- sieve
- filter screen
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- Details Of Valves (AREA)
Abstract
The utility model relates to a steam turbine bypath system steam conversion valve, which comprises a valve body, a valve base, a valve plug, a steam inlet connecting tube, and a tapered throttling plate. The valve base is arranged in the valve body, and is matched with the valve plug, and the lower part thereof is provided with the tapered throttling plate. The steam turbine bypath system steam conversion valve is characterized in that the inner wall of the valve body corresponding to the nozzle of the steam inlet connecting tube is sleeved with a sieve; reinforcing ribs are arranged in the longitudinal direction on the upper part and the lower part of the sieve in interval; the upper end of the sieve is fixedly connected with the upper part of the inner wall of the valve body; the lower end of the sieve contacts and is connected with the lower part of the inner wall of the valve body. By adopting the sieve, the conversion valve can bear the scour of high-pressure and high flow rate water during operation, and the brush can be prevented from being damaged or leaking, thus effectively ensuring the energy conservation and the high efficiency of the conversion valve, and the safe and reliable operation of the conversion valve. The steam turbine bypath system steam conversion valve has simple structure, is manufactured and installed simply, repaired and maintained conveniently, and can be widely applied.
Description
Technical field
The heat exchanger of industries such as the utility model relates to and a kind ofly is widely used in generating electricity, oil, chemical industry, particularly a kind of turbine bypass system steam converting valve.
Background technique
At present; the effect of the live steam by-pass system of thermoelectric generator assembly cover; be in the unit starting process, to be used to promote boiler pressure, steam temperature; in the orderly closedown process, be used for reclaiming working medium, be used to prevent the boiler superpressure in unit emergency stop valve trip, removal of load process; Boiler Steam is circulated by this system; guarantee not dry combustion method of reheater simultaneously, guarantee to shut down not blowing out to possess the condition of hot starting, hot start at any time.One-level or secondary bypath system steam converting valve be because the special role of pressure and temperature reducing and the restriction of parameter, and what the valve internal structure all adopted multi-step pressure reduction shrouds the formula structure.At heating surfaces such as boiler economizer, superheater, reheaters, in the maintenance of pipeline such as steam tube, supply pipe, the metal impurities that remain in the system are more, in the unit starting lifting process, bigger impurity particle is clipped between spool and the sealing surface of seat, makes sealing surface pit, defective such as damaged occur.Through the operation of long period, steam converting valve very easily produces leakage, and the leakage of high pressure steam changing valve will make pipeline that the danger of overtemperature is arranged; High-quality steam is then lost in the leakage of low voltage bypass steam converting valve will make the coagulator heat load increase the direct condenser vacuum that influences.By analyzing, it is the basic reason that causes valve leak that foreign material intervention valve seal is paid the position.
The model utility content
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of simple in structure, effect significantly, the turbine bypass system steam converting valve of reliable performance.
The technological scheme that the utility model adopted is for achieving the above object: a kind of turbine bypass system steam converting valve, comprise that valve body, valve seat, spool, steam inlet are taken over, the taper Rectifier plate, be provided with valve seat in the described valve body and cooperate with spool, its underpart is provided with the taper Rectifier plate; The sheathed filter screen of valve interior wall that it is characterized in that corresponding steam inlet adapter mouth of pipe place; Filter screen is upper and lower to be provided with stiffening rib around reaching longitudinal separation respectively, fixedlys connected with valve interior wall top in described filter screen upper end, and filter screen lower end and valve interior wall bottom touch.
The beneficial effects of the utility model are: distinctive filter structure setting, and make changing valve be in operation and tolerate washing away of high pressure, high flow rate water, can prevent that brush from decreasing leakage, enter benign cycle, thereby effectively guarantee the changing valve efficient energy-saving, safe and reliable to operation.Its structural design is simple, makes simple installation, and repair and maintenance is convenient, has wide range of applications.
Description of drawings
Fig. 1 is the utility model overall structure cross-sectional schematic;
Among the figure: 1 valve body, 2 valve seats, 3 spools, 4 steam inlets are taken over, 5 taper Rectifier plates, 6 filter screens.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
As shown in Figure 1, a kind of turbine bypass system steam converting valve comprises valve body 1, valve seat 2, spool 3, steam inlet adapter 4, taper Rectifier plate 5; Be provided with valve seat 2 in the described valve body 1 and cooperate with spool 3, its underpart is provided with taper Rectifier plate 5; It is characterized in that corresponding steam inlet takes over the sheathed filter screen 6 of valve body 1 inwall at 4 mouth of pipe places; Filter screen 6 upper and lower respectively around and longitudinal separation be provided with stiffening rib, fixedly connected with valve body 1 upper inside wall in described filter screen 6 upper ends, filter screen 6 lower ends and valve body 1 inwall bottom touch.
Described filter screen 6 adopts stainless steel material to make, and the filter opening interleaved on it is provided with, and guarantees the high efficiency filter foreign material; Filter screen 6 upper ends and valve body 1 adopt bolt or welding to fix.
Above-mentioned with reference to embodiment to the detailed description that this turbine bypass system steam converting valve carries out, be illustrative rather than determinate, therefore, should belong within the protection domain of the present utility model in the variation and the modification that do not break away under the utility model general plotting.
Claims (1)
1, a kind of turbine bypass system steam converting valve comprises that valve body, valve seat, spool, steam inlet are taken over, the taper Rectifier plate, is provided with valve seat in the described valve body and cooperates with spool, and its underpart is provided with the taper Rectifier plate; The sheathed filter screen of valve interior wall that it is characterized in that corresponding steam inlet adapter mouth of pipe place; Filter screen is upper and lower to be provided with stiffening rib around reaching longitudinal separation respectively, fixedlys connected with valve interior wall top in described filter screen upper end, and filter screen lower end and valve interior wall bottom touch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200750173U CN201209708Y (en) | 2008-06-13 | 2008-06-13 | Steam changeover valve for steam turbine by-path system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200750173U CN201209708Y (en) | 2008-06-13 | 2008-06-13 | Steam changeover valve for steam turbine by-path system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201209708Y true CN201209708Y (en) | 2009-03-18 |
Family
ID=40480444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200750173U Expired - Fee Related CN201209708Y (en) | 2008-06-13 | 2008-06-13 | Steam changeover valve for steam turbine by-path system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201209708Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818826B (en) * | 2009-04-22 | 2011-08-24 | 兰州理工大学 | Expansion valve |
-
2008
- 2008-06-13 CN CNU2008200750173U patent/CN201209708Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818826B (en) * | 2009-04-22 | 2011-08-24 | 兰州理工大学 | Expansion valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20130613 |