CN106051232B - A kind of check valve and its working method suitable for big flow working range - Google Patents
A kind of check valve and its working method suitable for big flow working range Download PDFInfo
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- CN106051232B CN106051232B CN201610546555.5A CN201610546555A CN106051232B CN 106051232 B CN106051232 B CN 106051232B CN 201610546555 A CN201610546555 A CN 201610546555A CN 106051232 B CN106051232 B CN 106051232B
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- Prior art keywords
- auxiliary
- spring
- seat
- main
- valve
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
Abstract
The present invention provides a kind of check valve and its working method suitable for big flow working range, including：Main valve plug, main spring, auxiliary valve core, auxiliary spring, shell, auxiliary-seat and auxiliary spring seat；One end of the shell is import, and one end of the other end and auxiliary-seat connects, and the other end of auxiliary-seat connect with auxiliary spring seat, and the other end of auxiliary spring seat is exports；The main valve plug is loaded on housing cavity, and main valve plug one end is connect close to import, the other end with main spring；The other end of main spring is fixed on the outer end face of auxiliary-seat；The auxiliary valve core is loaded on auxiliary-seat inner cavity；The inner face of the auxiliary valve core is fixed in described auxiliary spring one end, and the other end is fixed on auxiliary spring seat.The present invention solves the stability problem that big flow situation of change lower valve is opened, and acquirement steady operation range of flow is big, starting differential pressure is low, flow resistance is low, sealing reliability is high and the advantageous effect of long lifespan.
Description
Technical field
The present invention relates to a kind of check valves, and in particular to a kind of check valve and its work of the steady operation under big flow range
Make method, flows direction for controlling fluid media (medium).
Background technology
Check valve in the design process, often requires low Opening pressure and low reversed leak rate to refer in low reverse differential pressure
Mark, but there are contradictions between these indexs, especially under big flow situation of change, the unlatching stability of valve is that design is difficult again
Point.As application demand is increasingly harsh, it is desirable that check valve has operating flow range, lower starting differential pressure and the stream of bigger
Resistance, higher sealing reliability and longer working life.
Currently, refering to domestic and foreign literature, do not find under low reverse differential pressure and big flow working range, has both met low open
Pressure difference and the requirement of low flow resistance are opened, and with such structure one-way valve of reliable reversed leakproofness.
Invention content
The defects of for the above-mentioned prior art, the object of the present invention is to provide a kind of suitable for big flow working range
Check valve and its working method solve existing check valve and open stability problem under big flow operating condition, meet simultaneously
The requirement of low starting differential pressure, low flow resistance and low reversed leak rate (under low reverse differential pressure).
In order to achieve the above objectives, the technical solution adopted in the present invention is as follows：
A kind of check valve suitable for big flow working range, including：Main valve plug, main spring, auxiliary valve core, auxiliary spring, shell
Body, auxiliary-seat and auxiliary spring seat；One end of the shell is import, and one end of the other end and auxiliary-seat connects, auxiliary-seat
Other end is connect with auxiliary spring seat, and the other end of auxiliary spring seat is outlet；The main valve plug is loaded on housing cavity, main valve plug
One end is connect close to import, the other end with main spring；The other end of main spring is fixed on the outer end face of auxiliary-seat；The pair
Spool is loaded on auxiliary-seat inner cavity；The inner face of the auxiliary valve core is fixed in described auxiliary spring one end, and the other end is fixed on secondary bullet
Spring abutment.
The main valve plug is designed to size both ends, and small end is for axially directed, and close to import, big end is equipped with damping hole, with
Main spring connects.
Further, sealed valve core of the main valve plug O-ring as main valve plug is set on the main valve plug, is arranged on auxiliary valve core secondary
Sealed valve core of the spool O-ring as auxiliary valve core.
Further, the material of the main valve plug O-ring auxiliary valve core O-ring 4 is rubber.
Further, the sealing surface of the main valve plug and auxiliary valve core is designed to 90 ° of conical surfaces, the valve of the shell and auxiliary-seat
It is rubber that seat, which is designed to 90 ° of conical surface main valve plug O-rings and the material of auxiliary valve core O-ring,.
Further, the first dovetail groove is provided on 90 ° of conical surfaces of the main core valve, the main valve plug O-ring is loaded on described
The first dovetail groove in；The second dovetail groove is provided on 90 ° of conical surfaces of the auxiliary valve core, the auxiliary valve core O-ring is loaded on described
In second dovetail groove.
A kind of working method of check valve suitable for big flow working range, including：
When first task, when check valve inlet reaches certain pressure, overcomes the pretightning force of main spring, open main valve plug；
As inlet pressure further increases, the pretightning force of auxiliary spring, auxiliary valve core is overcome to open, medium is in valve internal stream
Logical, the corresponding flow resistance of generation acts on the radial section of main valve plug big end, and with the raising of flow, flow resistance power increases therewith,
Main valve plug continuous axial movement is pushed, check valve, which is finally stablized, to be opened；
When system workflow amount tapers into, the flow resistance of valve becomes smaller, and flow resistance, which is down to, is not enough to overcome main spring and secondary bullet
When the resultant force of spring, major and minor spool under spring force, gradually moves backward, is finally reached reversed sealing effect；
When check valve downstream, working medium pressure continuously decreases, the resultant force of major and minor initial tension of spring and media pressure downstream
When acting on active force on major and minor valve core sealed cover less than upstream medium, check valve starts again at work at this time.
Compared with prior art, advantages of the present invention includes：
1, novel structure type
Main valve plug small end serve it is axially directed, and main valve plug big end be used for set damping hole, which substantially reduces valve
Weight and structure length.In the case where meeting weight demands, not only increase opening force under small flow, but also realize low flow resistance under big flow
It is required that effectively increasing steady operation range of flow.Valve is equipped with the series redundancy sealing structure of twice dependent simultaneously, further
Improve sealing reliability；
2, using rubber o-ring seal style
Main valve plug and auxiliary valve core are all made of rubber o-ring and are sealed, which not only substantially reduces major and minor spring
Pretightning force (can reduce valve opening pressure), and meet the reversed leakproofness under low initial tension of spring, successfully solve to open pressure
Contradiction between the low index request height with leak rate of power, reverse differential pressure；
3, long-life measure is taken
The O-ring channel away of main valve plug and auxiliary valve core is dovetail groove, and compared with rectangle groove, dovetail groove has anticreep
Function can effectively prevent major and minor spool O-ring to be detached from after multiple action, effectively improve the working life of check valve.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the structural schematic diagram provided in an embodiment of the present invention suitable for big flow working range check valve；
Sectional view when Fig. 2 is the unlatching provided in an embodiment of the present invention suitable for big flow working range check valve.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
Fig. 1 is a kind of structural schematic diagram of one embodiment of big flow working range check valve of the present invention, including：Main valve plug O
Shape circle 1, main valve plug 2, main spring 3, auxiliary valve core O-ring 4, auxiliary valve core 5, auxiliary spring 6, shell 7, auxiliary-seat 8 and auxiliary spring seat 9.
One end of shell 7 is working media import, and the other end of shell 7 is connect with auxiliary-seat 8, such as the side for passing through welding
Method connects, and auxiliary spring seat 9 is connect with the other end of auxiliary-seat 8, for example connecting welding connects by welding；Auxiliary spring seat
9 is lead to structure in both ends open, the larger one end in surface is connect with auxiliary-seat 8, and auxiliary spring 6 is fixed on the larger one end in surface,
For the axis of auxiliary spring 6 with the axis of auxiliary spring seat 9 on same straight line, auxiliary spring seat 9 is working medium exit port.
Main valve plug 2 is loaded on 7 inner cavity of shell, and 2 small end of main valve plug play the guiding role, and big end is equipped with damping hole；Main valve plug O-ring
In 1 the first dovetail groove loaded on main valve plug 2, sealed together with the formation of 7 conical surface of shell；Main spring 3 is that main valve plug 2 provides sealing in advance
Clamp force and restoring force；Auxiliary valve core 5 is loaded on 8 inner cavity of auxiliary-seat, and auxiliary valve core O-ring 4 is loaded in the second dovetail groove of auxiliary valve core 5, with
8 conical surface of auxiliary-seat forms another road sealing；Auxiliary spring 6 is that auxiliary valve core 5 provides seal preload and restoring force.
In the following, the course of work of big flow working range check valve provided by the invention is described.
Fig. 2 is sectional view when big flow working range check valve provided by the invention is opened.
When first task, when check valve inlet reaches certain pressure, overcomes the pretightning force of main spring 3, opens main valve plug 2,
As inlet pressure further increases, the pretightning force of auxiliary spring 6, auxiliary valve core 5 is overcome to open, medium circulates in valve internal, production
Raw corresponding flow resistance acts on the radial section of 2 big end of main valve plug, and with the raising of flow, flow resistance power increases therewith, pushes
2 continuous axial movement of main valve plug, check valve, which is finally stablized, to be opened.
When system workflow amount tapers into, the flow resistance of valve becomes smaller, and flow resistance, which is down to, is not enough to overcome main spring 3 and secondary bullet
When the resultant force of spring 6, major and minor spool under spring force, gradually moves backward, is finally reached reversed sealing effect.
When check valve downstream, working medium pressure continuously decreases, the resultant force of major and minor initial tension of spring and media pressure downstream
When acting on active force on major and minor valve core sealed cover less than upstream medium, check valve starts again at work at this time.
From the above mentioned, check valve main valve plug is designed to that the structure of big small end increases opening force under small flow, realizes big stream
Low flow resistance requirement, effectively increases steady operation range of flow under amount；Major and minor spool is all made of rubber o-ring and is sealed, significantly
Major and minor initial tension of spring is reduced, and the reversed leakproofness in the case of low initial tension of spring can be met, while twice mutually link
Series redundancy sealing structure further increases sealing reliability；Major and minor spool O-ring groove is both designed as dovetail groove, improves single
To valve working life.
To sum up, present invention acquirement steady operation range of flow is big, starting differential pressure is low, flow resistance is low, sealing reliability is high and the longevity
Order long advantageous effect.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (6)
1. a kind of check valve suitable for big flow working range, which is characterized in that including：Main valve plug (2), main spring (3), pair
One end of spool (5), auxiliary spring (6), shell (7), auxiliary-seat (8) and auxiliary spring seat (9), the shell (7) is import, another
End connect with one end of auxiliary-seat (8), the other end of auxiliary-seat (8) is connect with auxiliary spring seat (9), auxiliary spring seat (9) it is another
One end is outlet；The main valve plug (2) is loaded on shell (7) inner cavity, and main valve plug (2) one end is close to import, the other end and main spring
(3) it connects；The other end of main spring (3) is fixed on the outer end face of auxiliary-seat (8)；The auxiliary valve core (5) is loaded on auxiliary-seat (8)
Inner cavity；The inner face of the auxiliary valve core (5) is fixed in described auxiliary spring (6) one end, and the other end is fixed on auxiliary spring seat (9),
The main valve plug (2) is designed to the structure at size both ends, and small end is for axially directed, and close to import, big end is equipped with damping hole, with
Main spring (3) connects.
2. the check valve according to claim 1 suitable for big flow working range, which is characterized in that the main valve plug
(2) main valve plug O-ring (1) is set on, as the sealed valve core of main valve plug (2), auxiliary valve core O shapes are set on the auxiliary valve core (5)
It encloses (4), the sealed valve core as auxiliary valve core (5).
3. the check valve according to claim 2 suitable for big flow working range, which is characterized in that the main valve plug O
The material of shape circle (1) and auxiliary valve core O-ring (4) is rubber.
4. the check valve according to claim 2 suitable for big flow working range, which is characterized in that the main valve plug
(2) and the sealing surface of auxiliary valve core (5) is designed to 90 ° of conical surfaces, and the valve seat of the shell (7) and auxiliary-seat (8) is designed to 90 °
The conical surface.
5. the check valve according to claim 4 suitable for big flow working range, which is characterized in that the main valve plug
(2) the first dovetail groove is provided on 90 ° of conical surfaces, the main valve plug O-ring (1) is loaded in first dovetail groove；The pair
The second dovetail groove is provided on 90 ° of conical surfaces of spool (5), the auxiliary valve core O-ring (4) is loaded in second dovetail groove.
6. the working method of the check valve according to claim 1 suitable for big flow working range, which is characterized in that
When first task, when check valve inlet reaches certain pressure, overcomes the pretightning force of main spring (3), open main valve plug (2)；
As inlet pressure further increases, the pretightning force of auxiliary spring (6), auxiliary valve core (5) is overcome to open, medium is in valve internal
Circulation, the corresponding flow resistance of generation act on the radial section of main valve plug (2) big end, and with the raising of flow, flow resistance power is therewith
Increase, push main valve plug (2) continuous axial movement, check valve, which is finally stablized, to be opened；
When system workflow amount tapers into, the flow resistance of valve becomes smaller, and flow resistance, which is down to, is not enough to overcome main spring (3) and auxiliary spring
(6) when resultant force, major and minor spool under spring force, gradually moves backward, is finally reached reversed sealing effect；
When check valve downstream, working medium pressure continuously decreases, and the resultant force of major and minor initial tension of spring and media pressure downstream is less than
When upstream medium acts on active force on major and minor valve core sealed cover, check valve starts again at work at this time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546555.5A CN106051232B (en) | 2016-07-12 | 2016-07-12 | A kind of check valve and its working method suitable for big flow working range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546555.5A CN106051232B (en) | 2016-07-12 | 2016-07-12 | A kind of check valve and its working method suitable for big flow working range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106051232A CN106051232A (en) | 2016-10-26 |
| CN106051232B true CN106051232B (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610546555.5A Active CN106051232B (en) | 2016-07-12 | 2016-07-12 | A kind of check valve and its working method suitable for big flow working range |
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| CN (1) | CN106051232B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911677B (en) * | 2020-07-31 | 2021-06-25 | 温州职业技术学院 | Magnetic control constant pressure valve |
| CN113915531B (en) * | 2021-11-04 | 2024-01-30 | 合肥市久环给排水燃气设备有限公司 | Gas odorizing device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3162037B2 (en) * | 1999-06-29 | 2001-04-25 | 兼工業株式会社 | Backflow prevention device |
| DE10311252B3 (en) * | 2003-03-14 | 2004-12-09 | Alfred Kärcher GmbH & Co KG | Backflow preventer |
| US20070204917A1 (en) * | 2006-03-01 | 2007-09-06 | Rain Bird Corporation | Backflow prevention device |
| CN201651452U (en) * | 2010-04-27 | 2010-11-24 | 宁波华成阀门有限公司 | Two-stage check valve |
| CN202992283U (en) * | 2012-12-08 | 2013-06-12 | 中国航天科技集团公司第六研究院第十一研究所 | Tandem double-valve-plug one-way valve for high pressure and redundancy sealing |
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2016
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| CN106051232A (en) | 2016-10-26 |
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