CN103851213B - A kind of two grades of main steam isolation valves of core - Google Patents
A kind of two grades of main steam isolation valves of core Download PDFInfo
- Publication number
- CN103851213B CN103851213B CN201210519602.9A CN201210519602A CN103851213B CN 103851213 B CN103851213 B CN 103851213B CN 201210519602 A CN201210519602 A CN 201210519602A CN 103851213 B CN103851213 B CN 103851213B
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- Prior art keywords
- valve
- assembly
- valve body
- flashboard
- main steam
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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 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.It includes valve body, flashboard assembly is installed in valve body, flashboard assembly is connected with valve rod, valve gap is located on valve body, being additionally provided with self-tightening sealing assembly between valve gap and valve body, 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 instruction assembly, and support is provided with driving means.It is an advantage of the invention that this valve is designed with guide ledges in the both sides of flashboard, the corresponding relevant position at 4 muscle of valve body is machined with gathering sill, using the teaching of the invention it is possible to provide the guiding of the horizontal both direction of flashboard assembly.
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 technology
At present, the main steam isolation valve of nuclear power plant of China all relies on import, not only increases engineering construction cost, and substantially prolongs procurement cycle.
Two grades of main steam isolation valves of core are one of most important valves 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 ruptures, main steam isolation valve provides quickly isolating of main steam, to limit the steam out of control release dress water capacity less than a steam generator, thus prevent the undue cooling of reactor coolant loop and undue rising of containment pressure and exceed design pressure.
The production domesticization research of two grades of main steam isolation valves of core, change the situation of such valve dependence on import, accomplish such valve autonomous Design manufacture, reducing purchase cost, shortening the construction period and reduce valve maintenance cycle and the expense of owner, there is good economic benefit and social benefit, promoted the localization process of nuclear power generating equipment.
Summary of the invention
It is an object of the invention to provide a kind of two grades of main steam isolation valves of core, this valve is two grades of code requirements of core, and inside nominal diameter is DN800mm, and design pressure is 8.4MPa, and design temperature is 315 DEG C, it is desirable to quick closing's time is≤5s, and design service life is 60 years.
The present invention is realized in, a kind of two grades of main steam isolation valves of core, it includes valve body, is provided with flashboard assembly in valve body, and flashboard assembly is connected with valve rod, valve gap is located on valve body, being additionally provided with self-tightening sealing assembly between valve gap and valve body, 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 instruction assembly, and support is provided with driving means.
It is an advantage of the invention that this valve is designed with guide ledges in the both sides of flashboard, the corresponding relevant position at 4 muscle of valve body is machined with gathering sill, using the teaching of the invention it is possible to provide the guiding of the horizontal both direction of flashboard assembly.
Accompanying drawing explanation
Fig. 1 is a kind of two grades of main steam isolation valve schematic diagrams of core 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 instruction assemblies, 9 driving means, 10 flashboards, 11 valve gathering sills, 12 guide ledges.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings:
As shown in Figure 1, a kind of two grades of main steam isolation valves of core include 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, is further fixed on self-tightening sealing assembly 5 between valve gap 4 and valve body 1, 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 instruction assembly 8, support 7 is fixed with driving means 9.
As in figure 2 it is shown, this main steam isolation valve is bigbore parallel double-flashboard gate valve.Traditional parallel double-flashboard structure flashboard does not has guide frame, and it only has 4 muscle of design on valve body, and the side of flashboard is played position-limiting action.Valve degree of freedom of flashboard assembly in opening-closing process is relatively big, and under the operating mode high for pressure medium, flow is big, flashboard assembly may produce vibration, 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 machined with valve gathering sill 11, using the teaching of the invention it is possible to provide the guiding of the horizontal both direction of flashboard assembly.
This guide frame is simple, and difficulty of processing is little.Owing to being symmetric design, make flashboard assembly be more uniformly stressed during valve opening and closing, run more steady.In view of the feature that valve operating condition downforce is high, rate-of flow is big, when valve quick closing valve action, guide frame can effectively reduce the vibration of flashboard assembly, prevents flashboard from reversing owing to media impingement produces, reduces the probability of valve seat/ram seal surface damage.
L-type position indicating device
Main steam isolation valve is provided with 6 position indicating switch, wherein fully open position 2, closed positions 2,90% open position 2 altogether, and wherein the position indicating switch of 90% aperture is used for the valve on-line checking in nuclear power plant.The position indicating arm of valve is arranged on the upper end of valve rod, and the head at indicating arm is provided with L-type instruction and hits plate.The effect of plate is hit in L-type instruction, it is possible to make the position indicating switch of 90% aperture have lasting signal to export, and common position instruction structure generally is contact.
L-type position indicating device simple in construction, the most reliably.This design changes previous position instruction switch contact pattern, it is to avoid 2 directions of rocking bar of 90% open position instruction switch swing, and improve the service life of position indicating switch；The signal of 90% position indicating switch can be made persistently to export rather than flash across simultaneously, decrease the generation of maloperation.
Main steam isolation valve maintains a normally open state under accidental conditions, regularly carries out the operability that partial journey (90% aperture) switching motion is online to verify valve, requires quick closedown within 5 seconds when needed.Main steam isolation valve also has that rate-of flow is big, the feature of actuating length length.
Claims (1)
- null1. two grades of main steam isolation valves of a core，It is characterized in that: it includes 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)，Self-tightening sealing assembly (5) it is additionally provided with between valve gap (4) and valve body (1)，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 instruction assembly (8)，Support (7) is provided with driving means (9)，Described valve body (1) is provided with guide ledges (12) in the both sides of flashboard (10)，The corresponding relevant position at 4 muscle of valve body (1) is machined with valve gathering sill (11)，The guiding of the horizontal both direction of flashboard assembly can be provided，Main steam isolation valve is provided with 6 position indicating switch altogether，Wherein fully open position 2，Closed positions 2，90% open position 2，Wherein the position indicating switch of 90% aperture is used for the valve on-line monitoring in nuclear power plant，The position indicating arm of valve is arranged on valve rod upper end，Head at indicating arm is provided with L-type instruction and hits plate，It is between fully open position to 90% aperture stroke that the effect of plate is hit in L-type instruction，The position indicating switch that can make 90% aperture has lasting signal to export.
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 CN103851213A (en) | 2014-06-11 |
| CN103851213B true CN103851213B (en) | 2016-08-03 |
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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 |
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| CN (1) | CN103851213B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104989838B (en) * | 2015-06-26 | 2018-02-27 | 大连大高阀门股份有限公司 | High pressure super large caliber quick closedown main steam isolation 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 |
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| Publication number | Publication date |
|---|---|
| CN103851213A (en) | 2014-06-11 |
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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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