CN204201145U - A kind of low voltage bypass valve - Google Patents
A kind of low voltage bypass valve Download PDFInfo
- Publication number
- CN204201145U CN204201145U CN201420585953.4U CN201420585953U CN204201145U CN 204201145 U CN204201145 U CN 204201145U CN 201420585953 U CN201420585953 U CN 201420585953U CN 204201145 U CN204201145 U CN 204201145U
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- valve
- flap
- hole
- valve seat
- valve body
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Abstract
The utility model proposes a kind of reasonable in design, good airproof performance and the low voltage bypass valve of long service life, with meet thermal power generation unit to maximizing, the demand of high parameterization development.It comprises valve body, valve seat, flap, valve rod, filler, column, sealing cover, top cover, isolating cylinder.Flap comprises flap and lower Disc, and Open Side Down is linked in lower Disc for upper flap.The media outlet place of valve seat side is provided with isolating cylinder, and the cross section of isolating cylinder both sides is respectively equipped with equally distributed through hole.This structure solves original structure single-stage and regulates thick, non-equilibrium flap causes steering force large, valve seat is non-dismountable, throttling and sealing surface do not separate, sealing surface easily seriously washes away, and leak-down rate is high, can not meet the drawback of system safety operation demand, the usability that valve is good can be ensured, and can meeting the market requirement.
Description
Technical field
The utility model belongs to steam valve, specifically a kind of low voltage bypass valve for fired power generating unit steam by-pass system.
Background technique
Low voltage bypass valve is applied to Large-scale fire-electricity unit one of steam by-pass system key equipment again; in order to protect boiler and turbine system device security; low voltage bypass valve is exactly that the steam that boiler reheater produces is walked around steam turbine, directly sends into solidifying hot device by the decompression desuperheat of low voltage bypass valve.For ensureing the imbalance of steam consumption between coordinator stove, improving startup and the part throttle characteristics of unit, improving Security and the flexibility of unit operation.As the important supplementary equipment of unit, the quality of low voltage bypass valve configuration directly has influence on Security and the Economy of unit, has great significance to unit starting and operation.
All arrange two groups of low voltage bypass valves according to fired power generating unit, because its structure single-stage regulates, non-equilibrium flap causes steering force large, and sealing surface washes away seriously, and leak-down rate is high, can not meet the drawback of system safety operation demand.
Summary of the invention
The purpose of this utility model is exactly be to overcome the drawback that above-mentioned prior art exists, and proposes a kind of reasonable in design, good airproof performance and the low voltage bypass valve of long service life, with meet thermal power generation unit to maximizing, the demand of high parameterization development.
The utility model realizes above-mentioned purpose by the following technical solutions:
A kind of low voltage bypass valve comprises valve body, valve seat, flap, valve rod, filler, column, sealing cover, top cover, isolating cylinder.
Described valve body is connected to the top of valve seat, has the spheroid of cavity in described valve body and valve seat are; Described spheroid is provided with vertically through hole, and side is provided with medium entrance; The top of described valve seat is provided with the hole corresponding with the through hole of body base, and the side of described valve seat is provided with media outlet; Described sealing cover is fastened on the through hole of body top, described sealing cover is connected with vertical column, the top of column is connected with top cover and drive unit, and the bottom of described drive unit is connected with valve rod, and the lower end of valve rod leads to valve inner through after sealing cover; Gap between described valve rod and sealing cover is filled by filler; The underpart of described valve rod is connected to flap by inverted T-shaped linking.
Described flap comprises flap and lower Disc, and described upper flap and lower Disc are tubular structure, and described lower Disc opening upwards is arranged on the through hole top of valve body lower portion, and Open Side Down is linked in the inside of lower Disc for described upper flap; The barrel of described upper flap is provided with one-level adjustment hole, and the barrel of described lower Disc is provided with secondary adjustment hole.
Preferably, the media outlet place of described valve seat side is provided with isolating cylinder, described isolating cylinder is hollow cylindrical body, and the cross section of isolating cylinder both sides is respectively equipped with equally distributed through hole, and the aperture of the through hole of described left side cross-sectional is less than the through hole in cross section, right side.
This valve adopts two-stage regulating type, and control characteristic is accurate, and multi-step pressure reduction noise is low; The pressurization equilibration that flap adopts top and the bottom entirely to lead is telescopic, and starting torque is little, and/quick closing valve is opened in easy realization soon; Sealing configuration adopts throttling to separate with plane sealing and designs, and protection valve sealing face is not washed; Valve seat adopts modularity design technology, has detachable valve seat, easy access, replacing; Desuperheat district arranges the isolating cylinder of thermal shock.
Solving original structure single-stage regulates thick, non-equilibrium flap causes steering force large, valve seat is non-dismountable, throttling and sealing surface do not separate, sealing surface easily seriously washes away, leak-down rate is high, can not meet the drawback of system safety operation demand, is the important step of the safe operation ensureing the overcritical and ultra supercritical large-scale thermal power machine group system such as China 600MW, 1000MW.The successful development of such valve is also applied to fired power generating unit, not only can ensure the usability that valve is good, and what is more important will improve the Security that ultra supercritical large-scale thermal power machine group system runs greatly, and can meeting the market requirement.Therefore, market and the Technique Popularizing prospect of the invention of this model utility are very wide, and its economical, societal benefits are extremely remarkable.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the schematic diagram of flap.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
A kind of low voltage bypass valve as shown in Figure 1 comprises valve body 1, valve seat 2, flap 3, valve rod 4, filler 5, column 6, sealing cover 7, top cover 8, isolating cylinder 9.
Valve body 1 is connected to the top of valve seat 2, has the spheroid of cavity in valve body 1 and valve seat 2 are; Valve body 1 is provided with vertically through hole, and side is provided with medium entrance; The top of valve seat 2 is provided with the hole corresponding with the through hole bottom valve body 1, and the side of valve seat 2 is provided with media outlet; Sealing cover 7 is fastened on the through hole at valve body 1 top, sealing cover 7 is connected with vertical column 6, and the top of column 6 is connected with top cover 8 and drive unit 9, and the bottom of drive unit 9 is connected with valve rod 4, and the lower end of valve rod 4 is inner through leading to valve body 1 after sealing cover 7; Gap between valve rod 4 and sealing cover 7 is filled by filler 5; The underpart of valve rod 4 is connected to flap 3 by inverted T-shaped linking.
The media outlet place of valve seat 2 side is provided with isolating cylinder 9, and isolating cylinder 9 is hollow cylindrical body, and the cross section of isolating cylinder 9 both sides is respectively equipped with equally distributed through hole 91, and the aperture of the through hole of left side cross-sectional is less than the through hole in cross section, right side.
Flap 3 as shown in Figure 2 comprises flap 31 and lower Disc 32, and upper flap 31 and lower Disc 32 are tubular structure, and lower Disc 32 opening upwards is arranged on the through hole of valve body 1 bottom, and Open Side Down is linked in the inside of lower Disc 32 for upper flap 31; The barrel of upper flap 31 is provided with one-level adjustment hole 33, and the barrel of lower Disc 32 is provided with secondary adjustment hole 34.
In the process of work, drive unit actuate valve stem drives flap upwards to move downward, valve seat and flapper member pressurize, first upper flap opens certain altitude, some vapor enters in lower Disc, before and after lower Disc, pressure difference significantly reduces, valve opening power significantly reduces thereupon, drive lower Disc is opened, after sealing surface is thrown off, low-voltage high-temperature steam is introduced into the one-level adjustment hole of particular adjustments characteristic and descendingly goes out to enter valve seat endoporus, to be reduced pressure out valve body by secondary adjustment hole, enter the desuperheat region of valve seat, adapted to it by steam flow and the even cooling water mixing of the atomization sprayed by nozzle, the impact of setting up isolating cylinder to avoid cooling water on the right side of valve seat to bring with direct contact of valve body, realize pipeline temperature difference stress to minimize, reduce noise.
Claims (3)
1. a low voltage bypass valve comprises valve body (1), valve seat (2), flap (3), valve rod (4), filler (5), column (6), sealing cover (7), top cover (8), isolating cylinder (9), it is characterized in that: described valve body (1) is connected to the top of valve seat (2), has the spheroid of cavity in described valve body (1) and valve seat (2) are; Described valve body (1) is provided with vertically through hole, and side is provided with medium entrance; The top of described valve seat (2) is provided with the hole corresponding with the through hole of valve body (1) bottom, and the side of described valve seat (2) is provided with media outlet; Described sealing cover (7) is fastened on the through hole at valve body (1) top, described sealing cover (7) is connected with vertical column (6), the top of column (6) is connected with top cover (8) and drive unit (9), the bottom of described drive unit (9) is connected with valve rod (4), and the lower end of valve rod (4) leads to valve body (1) inside afterwards through sealing cover (7); Gap between described valve rod (4) and sealing cover (7) is filled by filler (5); The underpart of described valve rod (4) is connected to flap (3) by inverted T-shaped linking.
2. a kind of low voltage bypass valve according to claim 1, it is characterized in that: described flap (3) comprises flap (31) and lower Disc (32), described upper flap (31) and lower Disc (32) are tubular structure, described lower Disc (32) opening upwards is arranged on the through hole of valve body (1) bottom, and Open Side Down is linked in the inside of lower Disc (32) for described upper flap (31); The barrel of described upper flap (31) is provided with one-level adjustment hole (33), and the barrel of described lower Disc (32) is provided with secondary adjustment hole (34).
3. a kind of low voltage bypass valve according to claim 1, it is characterized in that: the media outlet place of described valve seat (2) side is provided with isolating cylinder (9), described isolating cylinder (9) is hollow cylindrical body, the cross section of isolating cylinder (9) both sides is respectively equipped with equally distributed through hole (91), and the aperture of the through hole of described left side cross-sectional is less than the through hole in cross section, right side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585953.4U CN204201145U (en) | 2014-10-11 | 2014-10-11 | A kind of low voltage bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585953.4U CN204201145U (en) | 2014-10-11 | 2014-10-11 | A kind of low voltage bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201145U true CN204201145U (en) | 2015-03-11 |
Family
ID=52659109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585953.4U Expired - Fee Related CN204201145U (en) | 2014-10-11 | 2014-10-11 | A kind of low voltage bypass valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201145U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026229A (en) * | 2018-07-23 | 2018-12-18 | 嘉兴石化有限公司 | A kind of high steam decompression cooling noise reduction system |
| CN109538768A (en) * | 2018-12-07 | 2019-03-29 | 山东建筑大学 | A kind of high-temperature flue gas shut-off valve and preparation method thereof |
| CN110206907A (en) * | 2019-07-04 | 2019-09-06 | 李作为 | It is a kind of for flashing the fluid erosion prevention device of operating condition |
-
2014
- 2014-10-11 CN CN201420585953.4U patent/CN204201145U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026229A (en) * | 2018-07-23 | 2018-12-18 | 嘉兴石化有限公司 | A kind of high steam decompression cooling noise reduction system |
| CN109026229B (en) * | 2018-07-23 | 2023-08-29 | 嘉兴石化有限公司 | High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system |
| CN109538768A (en) * | 2018-12-07 | 2019-03-29 | 山东建筑大学 | A kind of high-temperature flue gas shut-off valve and preparation method thereof |
| CN110206907A (en) * | 2019-07-04 | 2019-09-06 | 李作为 | It is a kind of for flashing the fluid erosion prevention device of operating condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20171011 |