CN103851213A - Nuclear secondary main steam isolation valve - Google Patents
Nuclear secondary main steam isolation valve Download PDFInfo
- Publication number
- CN103851213A CN103851213A CN201210519602.9A CN201210519602A CN103851213A CN 103851213 A CN103851213 A CN 103851213A CN 201210519602 A CN201210519602 A CN 201210519602A CN 103851213 A CN103851213 A CN 103851213A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- assembly
- main steam
- flashboard
- Prior art date
- 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.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/316—Guiding of the slide
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Control Of Turbines (AREA)
Abstract
The invention belongs to a main steam isolation valve of two loops of a nuclear power plant, and particularly relates to a gas/liquid driving large-caliber fast-closing gate valve. The large-caliber fast-closing gate valve comprises a valve body, wherein a gate plate assembly is arranged in the valve body, the gate plate assembly is connected with a valve rod, a valve cover is arranged on the valve body, a self-tightening seal assembly is also arranged between the valve cover and the valve body, the upper part of the valve cover is provided with a packing seal assembly, the valve cover is also connected with a support frame, a position indication assembly is arranged on the packing seal assembly, and a driving device is arranged on the support frame. The large-caliber fast-closing gate valve has the advantages that the valve is provided with guide lug bosses at two sides of a grate plate, guide grooves are correspondingly processed in corresponding positions of four ribs of the valve body, and the guide of the gate plate assembly in two horizontal directions can be provided.
Description
Technical field
The invention belongs to the main steam isolation valve of a kind of nuclear power plant secondary circuit, be specifically related to the large-diameter fast pass gate valve that a kind of gas/liquid drives.
Background technique
At present, the main steam isolation valve of nuclear power plant of China all depends on import, has not only improved engineering construction cost, and has greatly extended procurement cycle.
Core secondary main steam isolation valve is one of most important valve of nuclear power plant, for PWR nuclear power plant secondary circuit main steam system, when the main steam pipe part in containment or outside containment is broken, main steam isolation valve provides the quick isolation of main steam, discharge and be no more than the dress water capacity of a steam generator to limit steam out of control, thus prevent reactor coolant loop too cooling and containment pressure undue rising and exceed design pressure.
The production domesticization research of core secondary main steam isolation valve, change the situation of such valve dependence on import, accomplish such valve autonomous Design manufacture, reduce purchase cost, shortening the construction period and reducing owner's valve maintenance period and expense, there is good economic benefit and social benefit, promoted the localization process of nuclear power generating equipment.
Summary of the invention
The object of this invention is to provide a kind of core secondary main steam isolation valve, this valve is core secondary code requirement, and inside nominal diameter is DN800mm, and design pressure is 8.4MPa, and design temperature is 315 ℃, requires quick closing's time to be≤5s, and design service life is 60 years.
The present invention realizes like this, a kind of core secondary main steam isolation valve, it comprises valve body, and flashboard assembly is installed in valve body, and flashboard assembly is connected with valve rod, valve gap is located on valve body, between valve gap and valve body, be also provided with self-tightening sealing assembly, the top of valve gap is provided with packing seal assembly, and valve gap is also connected with support, packing seal assembly is provided with position indication component, and support is provided with drive unit.
Advantage of the present invention is, this valve is designed with guide ledges in the both sides of flashboard, and the corresponding relevant position at 4 muscle of valve body is processed with guiding groove, and the guiding of the horizontal both direction of flashboard assembly can be provided.
Accompanying drawing explanation
Fig. 1 is a kind of core secondary main steam isolation valve schematic diagram provided by the present invention;
Fig. 2 is flashboard assembly schematic diagram.
In figure, 1 valve body, 2 flashboard assemblies, 3 valve rods, 4 valve gaps, 5 self-tightening sealing assemblies, 6 packing seal assemblies, 7 supports, 8 position indication components, 9 drive units, 10 flashboards, 11 valve guiding grooves, 12 guide ledges.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As shown in Figure 1, a kind of core secondary main steam isolation valve comprises valve body 1, flashboard assembly 2 is installed in valve body 1, flashboard assembly 2 is connected with valve rod 3, and valve gap 4 is arranged on valve body 1, between valve gap 4 and valve body 1, is also fixed with self-tightening sealing assembly 5, the top of valve gap 4 is provided with packing seal assembly 6, valve gap 4 is also connected with support 7, and position indication component 8 is installed on packing seal assembly 6, is fixed with drive unit 9 on support 7.
As shown in Figure 2, this main steam isolation valve is bigbore parallel double-flashboard gate valve.Traditional double disc parallel seat structure flashboard does not have guide structure, and it only has 4 muscle that design on valve body, and position-limiting action is played in the side of flashboard.Valve degrees of freedom of flashboard assembly in opening-closing process is larger, and under the operating mode high for pressure medium, flow is large, flashboard assembly may produce vibration, and even flashboard can produce the situation of slight torsion.This valve is provided with guide ledges 12 in the both sides of flashboard 10, and the corresponding relevant position at 4 muscle of valve body is processed with valve guiding groove 11, and the guiding of the horizontal both direction of flashboard assembly can be provided.
This guide structure is simple, and difficulty of processing is little.Owing to being symmetric design, in the process of valve opening and closing, make flashboard assembly stressed more even, move more steady.In view of the feature that valve operating conditions downforce is high, rate-of flow is large, in the time that valve quick closing valve moves, guide structure can effectively reduce the vibration of flashboard assembly, prevents that flashboard from producing and reversing because medium impacts, and reduces the possibility of valve seat/flashboard sealing face damage.
L-type position indicating device
Main steam isolation valve is provided with 6 position indicating switch altogether, wherein 2 of fully open positions, 2 of complete shut-down positions, 90% 2 of aperture positions, the wherein position indicating switch of 90% aperture online detection in nuclear power plant for valve.The position indicating arm of valve is arranged on the upper end of valve rod, at the head of indicating arm, L-type indication is installed and hits plate.The effect that plate is hit in L-type indication is between 90% aperture stroke, can make the position indicating switch of 90% aperture have lasting signal output, and common position indicating structure generally to be contact type at fully open position.
L-type position indicating device is simple in structure, accurately reliable.This design has changed previous position indicator cock contact pattern, has avoided 2 directions of rocking bar of 90% aperture position indicating switch to swing, the working life of having improved position indicating switch; Can make the signal of 90% position indicating switch continue output, rather than flash across, reduced the generation of misoperation simultaneously.
Main steam isolation valve keeps normally open under accidental conditions, and regular carries out partial journey (90% aperture) switching motion with the online operability of checking valve, requires when needed quick closedown within 5 seconds.Main steam isolation valve also has the feature that rate-of flow is large, actuating length is long.
Claims (2)
1. a core secondary main steam isolation valve, it is characterized in that: it comprises valve body (1), flashboard assembly (2) is installed in valve body (1), flashboard assembly (2) is connected with valve rod (3), valve gap (4) is located on valve body (1), between valve gap (4) and valve body (1), be also provided with self-tightening sealing assembly (5), the top of valve gap (4) is provided with packing seal assembly (6), valve gap (4) is also connected with support (7), packing seal assembly (6) is provided with position indication component (8), and support (7) is provided with drive unit (9).
2. a kind of core secondary main steam isolation valve as claimed in claim 1, it is characterized in that: described valve body (1) is provided with guide ledges (12) in the both sides of flashboard (10), the relevant position of corresponding 4 muscle at valve body (1) is processed with valve guiding groove (11), and the guiding of the horizontal both direction of flashboard assembly can be provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519602.9A CN103851213B (en) | 2012-12-06 | 2012-12-06 | A kind of two grades of main steam isolation valves of core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519602.9A CN103851213B (en) | 2012-12-06 | 2012-12-06 | A kind of two grades of main steam isolation valves of core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103851213A true CN103851213A (en) | 2014-06-11 |
| CN103851213B CN103851213B (en) | 2016-08-03 |
Family
ID=50859206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210519602.9A Active CN103851213B (en) | 2012-12-06 | 2012-12-06 | A kind of two grades of main steam isolation valves of core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103851213B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747788A (en) * | 2015-04-01 | 2015-07-01 | 上海阀门厂有限公司 | Opening-closing position indicating structure of low-pressure-difference opening check valve |
| CN104989838A (en) * | 2015-06-26 | 2015-10-21 | 大连大高阀门股份有限公司 | High-pressure and ultra-large diameter rapidly-closed main steam isolating valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173995A (en) * | 1966-05-06 | 1969-12-10 | Financ Et Ind Des Ateliers Et | Improvements in Valves having Gate Blocks |
| DE2615220A1 (en) * | 1976-04-08 | 1977-10-27 | Westark Armaturen | Nuclear power plant shut-off valve - has cylindrical inserts welded to main passage transitions and strengthened guides |
| WO2004109165A1 (en) * | 2003-06-06 | 2004-12-16 | Danfoss Esco As | Gate valve |
| CN2816516Y (en) * | 2005-08-31 | 2006-09-13 | 黄作兴 | Nuclear-electric sluice valve |
| CN101561050A (en) * | 2009-05-21 | 2009-10-21 | 南方阀门制造有限公司 | Wash pipe valve |
| CN101586670A (en) * | 2008-05-20 | 2009-11-25 | 核电秦山联营有限公司 | Nuclear second-stage electric V-shaped brake valve |
| CN102563108A (en) * | 2011-11-29 | 2012-07-11 | 南通高中压阀门有限公司 | Universal pressure self-sealing gate valve with double parallel discs |
| CN203023525U (en) * | 2012-12-06 | 2013-06-26 | 中核苏阀科技实业股份有限公司 | Nuclear secondary main steam isolation valve |
-
2012
- 2012-12-06 CN CN201210519602.9A patent/CN103851213B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173995A (en) * | 1966-05-06 | 1969-12-10 | Financ Et Ind Des Ateliers Et | Improvements in Valves having Gate Blocks |
| DE2615220A1 (en) * | 1976-04-08 | 1977-10-27 | Westark Armaturen | Nuclear power plant shut-off valve - has cylindrical inserts welded to main passage transitions and strengthened guides |
| WO2004109165A1 (en) * | 2003-06-06 | 2004-12-16 | Danfoss Esco As | Gate valve |
| CN2816516Y (en) * | 2005-08-31 | 2006-09-13 | 黄作兴 | Nuclear-electric sluice valve |
| CN101586670A (en) * | 2008-05-20 | 2009-11-25 | 核电秦山联营有限公司 | Nuclear second-stage electric V-shaped brake valve |
| CN101561050A (en) * | 2009-05-21 | 2009-10-21 | 南方阀门制造有限公司 | Wash pipe valve |
| CN102563108A (en) * | 2011-11-29 | 2012-07-11 | 南通高中压阀门有限公司 | Universal pressure self-sealing gate valve with double parallel discs |
| CN203023525U (en) * | 2012-12-06 | 2013-06-26 | 中核苏阀科技实业股份有限公司 | Nuclear secondary main steam isolation valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747788A (en) * | 2015-04-01 | 2015-07-01 | 上海阀门厂有限公司 | Opening-closing position indicating structure of low-pressure-difference opening check valve |
| CN104747788B (en) * | 2015-04-01 | 2016-10-19 | 上海阀门厂股份有限公司 | A kind of position of the switch instruction structure of low voltage difference opens check valve |
| CN104989838A (en) * | 2015-06-26 | 2015-10-21 | 大连大高阀门股份有限公司 | High-pressure and ultra-large diameter rapidly-closed main steam isolating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103851213B (en) | 2016-08-03 |
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Address after: 215129 No. 501, Suzhou New District, Jiangsu, Suzhou, Zhujianglu Road Patentee after: CNNC SUFA TECHNOLOGY INDUSTRY Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 215129 No. 501, Suzhou New District, Jiangsu, Suzhou, Zhujianglu Road Patentee before: CNNC SUFA TECHNOLOGY INDUSTRY Co.,Ltd. Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |