CN104633240A - Regulation valve air cylinder having safe cut-off function - Google Patents
Regulation valve air cylinder having safe cut-off function Download PDFInfo
- Publication number
- CN104633240A CN104633240A CN201310549106.2A CN201310549106A CN104633240A CN 104633240 A CN104633240 A CN 104633240A CN 201310549106 A CN201310549106 A CN 201310549106A CN 104633240 A CN104633240 A CN 104633240A
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- China
- Prior art keywords
- cylinder body
- cylinder
- piston
- valve
- function
- 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.)
- Pending
Links
- 230000033228 biological regulation Effects 0.000 title abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to a pneumatic actuator used for a valve and particularly relates to a regulation valve which is used in a nuclear power plant and has a safe cut-off function. The air cylinder includes a cylinder body, a piston is arranged in the cylinder body and provided with a spring, a working cavity is formed between the lower portion of the piston and the cylinder body, a spring cavity is formed between the upper portion of the piston and the cylinder body, and a high-pressure nitrogen cavity is formed in the upper portion of the cylinder body. The pneumatic actuator has the advantages that the functions of a regulation valve are further improved in principle, original performance can be unchanged as long as a discrete structure is used for achieving additional functions, and therefore an original valve can be applied to a new system without a large improvement; the high-pressure nitrogen cavity structure can output force required by the safe cut-off function, is formed by partitioning an ineffective space above a spring cavity of a common air cylinder, is compact in structure, will not increase the extra height for the air cylinder, and is limited in weight increase.
Description
Technical field
The invention belongs to a kind of valve pneumatic actuator, be specifically related to a kind of modulating valve possessing safety cut-off function used at nuclear power station.
Background technique
Along with the demand of nuclear power station to Security is more and more higher, part modulating valve is required the safety cut-off function with standby, is isolated by pipeline by modulating valve when main isolating valve loses efficacy.Solution common at present increases cylinder bore, but the cut-out power needed due to valve is several times as much as adjustment force, directly causes that cylinder mass is huge, processing difficulties, crosses conference simultaneously cause degree of regulation to decline due to Returnning spring rigidity.Safe level cutting function modulating valve cylinder, for driving the modulating valve that valve can also be forced shutdown when the security incidents such as earthquake occur, this type cylinder has compared with the ordinary construction cylinder realizing safe level cutting function the advantage that volume is little, lightweight, precision is high.
Summary of the invention
The object of this invention is to provide a kind of safe level cutting function modulating valve cylinder, under it can not significantly affect the prerequisite of actuator's volume, weight, increasing cutting function does not but affect modulating valve precision
The present invention is achieved in that safe level cutting function modulating valve cylinder, and it comprises cylinder body, be provided with piston in cylinder body, piston is provided with spring, form active chamber between the bottom of piston and cylinder body, form spring chamber between the top of piston and cylinder body, the top of cylinder body has elevated pressure nitrogen air cavity.
Advantage of the present invention is, further increases the function of modulating valve from principle.Just use discrete structure to realize additional function, original performance can be kept constant.Make original valve not need to do too large improvement and namely can be applicable to new system.High pressure nitrogen cavity configuration can output safety cutting function need power.High pressure nitrogen cavity configuration utilizes the idle space on common cylinder spring chamber top to cut off to form, and compact structure, can not increase extra height, and weight also increases limited.
Accompanying drawing explanation
Fig. 1 is safe level cutting function modulating valve air cylinder structure figure provided by the present invention;
Fig. 2 safe level cutting function modulating valve control principle drawing under cylinder normal operation;
Fig. 3 safe level cutting function modulating valve control principle drawing in cylinder fast shut-off situation.
In figure: 1 cylinder body; 2 active chambers; 3 pistons; 4 spring chambers; 5 springs; 6 elevated pressure nitrogen air cavitys; 11 cylinders; 12 electropneumatic valve positioners; 13 air-filtering decompressors; 14 pneumatic amplifiers; 15 core level Pneumatic valves; 16 core level solenoid valves; 17 stop valves.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As shown in Figure 1, safe level cutting function modulating valve cylinder, it comprises cylinder body 1, be provided with in cylinder body 1 on piston 3, piston 3 and be set with spring 5, active chamber 2 is formed between the bottom of piston 3 and cylinder body 1, form spring chamber 4 between the top of piston 3 and cylinder body 1, the top of cylinder body 1 has elevated pressure nitrogen air cavity 6.The elevated pressure nitrogen air cavity on top, the spring chamber at middle part and the active chamber of bottom is divided into through project organization formula.The elevated pressure nitrogen air cavity on top can be filled with the nitrogen of setting pressure according to need of work.
As shown in Figure 2, cylinder is equal to common cylinder when normal operation, by air-filtering decompressor, positioning work piece, pneumatic amplifier (apolegamy), the pressurized air of required pressure is filled with active chamber, piston can be made to be positioned at different positions.Spring chamber is emptying simultaneously, guarantees not produce back pressure.
As shown in Figure 3, when security incident occurs, high pressure nitrogen is imported spring chamber by the action of core level solenoid valve, high pressure nitrogen promotes cylinder piston with several times spring force and moves downward, control core level Pneumatic valve is by emptying for cylinder bottom active chamber to eliminate back pressure simultaneously, makes cylinder complete the function of rapid-closure damper.
Safe level cutting function modulating valve cylinder, be mainly used in the crucial modulating valve (as non-active nuclear power station owner feed-regulating valve) of driving one class nuclear power station, this type of valve not only possesses the function of common modulating valve, valve can also be forced shutdown when the security incidents such as earthquake occur.This type cylinder has compared with the ordinary construction cylinder realizing safe level cutting function the advantage that volume is little, lightweight, precision is high.
Cylinder top is provided with elevated pressure nitrogen air cavity, is filled with the nitrogen of setting pressure according to need of work.Cylinder is equal to common cylinder when normal operation, when security incident occurs, by core level solenoid valve, high pressure nitrogen is imported spring chamber, promote cylinder piston with several times spring force to move downward, core level Pneumatic valve is by emptying for cylinder bottom active chamber to eliminate back pressure simultaneously, makes cylinder complete the function of rapid-closure damper.Elevated pressure nitrogen air cavity utilizes the idle space on common cylinder spring chamber top to cut off to form, and compact structure, can not increase extra height, and weight also increases limited.
Claims (1)
1. safe level cutting function modulating valve cylinder, it is characterized in that: it comprises cylinder body (1), be provided with piston (3) in cylinder body (1), piston (3) is provided with spring (5), active chamber (2) is formed between the bottom of piston (3) and cylinder body (1), form spring chamber (4) between the top of piston (3) and cylinder body (1), the top of cylinder body (1) has elevated pressure nitrogen air cavity (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549106.2A CN104633240A (en) | 2013-11-07 | 2013-11-07 | Regulation valve air cylinder having safe cut-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549106.2A CN104633240A (en) | 2013-11-07 | 2013-11-07 | Regulation valve air cylinder having safe cut-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104633240A true CN104633240A (en) | 2015-05-20 |
Family
ID=53212305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310549106.2A Pending CN104633240A (en) | 2013-11-07 | 2013-11-07 | Regulation valve air cylinder having safe cut-off function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104633240A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4241644A (en) * | 1977-12-10 | 1980-12-30 | Vat Aktiengesellschaft Fuer Vakuum-Apparate Technik | Pneumatic actuator |
| CN1896571A (en) * | 2005-06-28 | 2007-01-17 | 欧美尔有限公司 | Servo operation piston valve with pneumatic acutator |
| CN201851683U (en) * | 2010-10-08 | 2011-06-01 | 浙江康赛特阀门有限公司 | Bidirectional flow pneumatic angle place valve |
| CN202561060U (en) * | 2012-04-23 | 2012-11-28 | 温州永德信流体设备有限公司 | Bottom valve for single-base tank |
| CN202901488U (en) * | 2012-11-27 | 2013-04-24 | 浙江欧斯特泵阀有限公司 | Energy accumulation emergency cut-off valve |
-
2013
- 2013-11-07 CN CN201310549106.2A patent/CN104633240A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4241644A (en) * | 1977-12-10 | 1980-12-30 | Vat Aktiengesellschaft Fuer Vakuum-Apparate Technik | Pneumatic actuator |
| CN1896571A (en) * | 2005-06-28 | 2007-01-17 | 欧美尔有限公司 | Servo operation piston valve with pneumatic acutator |
| CN201851683U (en) * | 2010-10-08 | 2011-06-01 | 浙江康赛特阀门有限公司 | Bidirectional flow pneumatic angle place valve |
| CN202561060U (en) * | 2012-04-23 | 2012-11-28 | 温州永德信流体设备有限公司 | Bottom valve for single-base tank |
| CN202901488U (en) * | 2012-11-27 | 2013-04-24 | 浙江欧斯特泵阀有限公司 | Energy accumulation emergency cut-off valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150520 |
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| RJ01 | Rejection of invention patent application after publication |