CN104100747B - A kind of pilot operated safety valve - Google Patents
A kind of pilot operated safety valve Download PDFInfo
- Publication number
- CN104100747B CN104100747B CN201410326459.0A CN201410326459A CN104100747B CN 104100747 B CN104100747 B CN 104100747B CN 201410326459 A CN201410326459 A CN 201410326459A CN 104100747 B CN104100747 B CN 104100747B
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- CN
- China
- Prior art keywords
- valve
- main
- pilot
- main valve
- pilot valve
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- 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.)
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
Abstract
The present invention relates to a kind of pilot operated safety valve, including main valve and pilot valve, wherein, described main valve includes valve body of main valve, main valve flap, main valve valve rod, main valve valve gap, main spool spring, piston, piston ring, filler and conduit, described pilot valve includes pilot valve pressure guiding pipe, pilot valve valve body, pilot valve flap, pilot valve valve rod, pilot valve valve gap, pilot valve spring and fairlead, described main valve valve gap is provided with pilot valve discharge-channel, described main valve valve gap is linked into an integrated entity formula structure by bolt and pilot valve valve body, avoid environmental pollution, extend service life, save cost.
Description
Technical field
The present invention relates to a kind of relief valve, be specifically related to a kind of pilot operated safety valve.
Background technology
Pilot operated safety valve is a kind of non-immediate action type relief valve, due to the requirement of operating mode and being permitted of manufacture
Can wait special circumstances, pilot operated safety valve can not be replaced by other relief valve, in the work such as oil, chemical industry
It is widely used on industry equipment.Pilot operated safety valve has a following feature compared with spring loaded safety valve:
(1) can have good sealing under closely opening pressure；(2) sealing is the most easy to maintenance；(3)
The action of valve is not affected by back pressure；(4) the unlatching pressure of valve can be set at work, it is easy to
Regulation；(5) discharge capacity is big, and bore is big；(6) pressure can be accomplished the highest.
But the plunger shaft that pilot operated safety valve has a disadvantage in that (1) main valve is provided with outlet, can be by cavity
Interior pressure medium is emitted in air, easily pollutes；(2) pilot valve spring arrangement is bottom pilot valve,
Being immersed in during work in working media, pilot valve spring is easily corroded by medium influence, reduces the use longevity
Life, adds cost.
Summary of the invention
The technical problem to be solved is to provide a kind of pilot operated safety valve, it is to avoid environment is dirty
Dye, extends service life, has saved cost.
For solving above-mentioned technical problem, the technical scheme is that
A kind of pilot operated safety valve, including main valve and pilot valve, wherein, described main valve includes valve body of main valve,
Main valve flap, main valve valve rod, main valve valve gap, main spool spring, piston, piston ring, filler and conduit,
Described pilot valve includes pilot valve pressure guiding pipe, pilot valve valve body, pilot valve flap, pilot valve valve rod, pilot valve valve gap, leads
Valve spring and fairlead；Described main valve valve gap is bolted on above valve body of main valve, described main valve valve
Being provided with main valve piston chamber in lid, described main valve valve rod runs through main valve valve gap and valve body of main valve, outside main valve valve rod
Be sequentially provided with main spool spring, filler and piston week from top to bottom, described main valve valve rod bottom be fixed on master
Main valve flap on valve body contacts, and described piston ring is coated on described piston outer periphery, and described piston sets
Putting in described plunger shaft, plunger shaft is separated into upper cavity and lower chamber, described lower chamber bottom is provided with
Media outlet, described valve body of main valve is provided with main valve inlet passage and Main valve outlet passage, and described main valve enters
Being provided with main dividing plate between mouth passage and Main valve outlet passage, described main dividing plate is provided with main valve passage, described
Main valve flap is fixed on below described main valve passage, and described main valve inlet passage is provided with conduit access port,
Described tube at one end fixes with media outlet, and the other end is fixed on described conduit access port；Described lead
Valve valve gap is arranged on the top of described pilot valve valve body, and described pilot valve valve rod runs through pilot valve valve gap and pilot valve valve body,
Described pilot valve stem outer circumference is sequentially provided with pilot valve spring and fairlead from top to bottom, pilot valve valve rod lower end with lead
Valve flap contacts, and described pilot valve spring is fixed on the top of described pilot valve valve rod, described pilot valve pressure guiding pipe
It is arranged on the bottom of described pilot valve valve body；Described main valve valve gap is provided with pilot valve discharge-channel, described main valve
Valve gap is linked into an integrated entity formula structure by bolt and pilot valve valve body, make pilot valve discharge-channel directly with main valve phase
Intercommunicated.
The operation principle of the present invention is: pressure medium, in pilot valve pressure guiding pipe enters pilot valve, makes in pilot valve
Pressure raises, and when pressure exceedes pilot valve pressure set in advance, pilot valve flap is opened, pressure medium warp
Pilot valve discharge-channel enters in main valve piston upper cavity, thus overcomes main spool spring elastic force effect to promote piston
Moving downward, make main valve flap open, now, main medium flows into from main valve inlet passage, then from main valve
Exit passageway is discharged, and this process makes the pressure in main valve decline, and now in pilot valve, pressure declines accordingly,
When in pilot valve, pressure is less than the setting pressure of pilot valve, pilot valve flap is under the effect of the elastic force of pilot valve spring
Closing, the pressure medium of main valve piston upper cavity gap at gap-clearance of piston rings enters plunger shaft lower chamber,
Flowing into Main valve outlet from conduit again, upper cavity distress resolves, main valve flap is at main spool spring power and main valve valve
Reset under the effect of medium under lobe closedown.
The present invention uses full-enclosed structure, is interconnected with main valve piston chamber by valve body of main valve by conduit,
The pressure medium making main valve piston intracavity is not emitted in air, but Main valve outlet passage is discharged, more
Safety and environmental protection, the operating mode making this valve be applicable to not to allow pressure medium externally to discharge；
Main valve valve gap and pilot valve valve body are connected into integral structure, make pilot valve discharge-channel and main valve
Directly being interconnected, compact conformation, the pressure loss between pilot valve and main valve is little, improves the action of valve
Sensitivity；
Pilot valve spring is installed on pilot valve valve stem top, and this just makes spring away from pressure medium, improves height
The stability of temperature operating mode lower spring rigidity, and due to pilot valve spring away from pressure medium farther out, so pilot valve bullet
Spring is susceptible to the impact of corrosive medium, extends service life, reduces cost.
Accompanying drawing explanation
Fig. 1 is the sectional view of the present invention
Fig. 2 is the schematic enlarged-scale view of pilot valve of the present invention
Fig. 3 is A portion of the present invention enlarged drawing
Detailed description of the invention
A kind of pilot operated safety valve as shown in the figure, including main valve 29 and pilot valve 30, wherein, described main valve
Including valve body of main valve 1, main valve flap 2, main valve valve rod 3, main valve valve gap 7, main spool spring 9, piston 5,
Piston ring 6, filler 8 and conduit 4, described pilot valve includes pilot valve pressure guiding pipe 10, pilot valve valve body 11, leads
Valve flap 12, pilot valve valve rod 14, pilot valve valve gap 15, pilot valve spring 16 and fairlead 13；Described main valve
Valve gap 7 is fixed on above valve body of main valve 1 by bolt 17, is provided with main valve piston in described main valve valve gap 7
Chamber 18, described main valve valve rod 3 runs through main valve valve gap 7 and valve body of main valve 1, and main valve valve rod 3 periphery is from upper
Be sequentially provided with main spool spring 9, filler 8 and piston 5 under and, described main valve valve rod 3 bottom be fixed on master
Main valve flap 2 on valve body 1 contacts, and described piston ring 5 is coated on described piston 6 periphery, institute
State piston 5 to be arranged in described plunger shaft 18, plunger shaft 18 is separated into upper cavity 19 and lower chamber
20, described lower chamber 20 bottom is provided with media outlet 21, and described valve body of main valve 1 is provided with main valve inlet and leads to
Road 22 and Main valve outlet passage 23, between described main main valve inlet passage 22 and Main valve outlet passage 23
Being provided with main dividing plate 24, described main dividing plate 24 is provided with main valve passage 25, and described main valve flap 2 is fixed on
Below described main valve passage 25, described main valve inlet passage 22 is provided with conduit access port 26, described in lead
Pipe 4 one end fixes with media outlet 21, and the other end is fixed on described conduit access port 26；Described
Pilot valve valve gap 15 is arranged on the top of described pilot valve valve body 11, and described pilot valve valve rod 14 runs through pilot valve valve gap
15 are sequentially provided with pilot valve spring 16 from top to bottom with pilot valve valve body 11, described pilot valve valve rod 14 periphery and lead
To set 13, pilot valve valve rod 14 top contacts with pilot valve flap 12, and described pilot valve spring 16 is fixed on
The top of described pilot valve valve rod 14, described pilot valve pressure guiding pipe 10 is arranged on the bottom of described pilot valve valve body 11；
Described main valve valve gap 7 is provided with pilot valve discharge-channel 27, and described main valve valve gap 7 is by bolt and pilot valve valve
Body 11 links into an integrated entity formula structure, makes pilot valve discharge-channel 27 directly be interconnected with main valve 29.
The operation principle of the present invention is: pressure medium, in pilot valve pressure guiding pipe enters pilot valve, makes in pilot valve
Pressure raises, and when pressure exceedes pilot valve pressure set in advance, pilot valve flap is opened, pressure medium warp
Pilot valve discharge-channel enters in main valve piston upper cavity, thus overcomes main spool spring elastic force effect to promote piston
Moving downward, make main valve flap open, now, main medium flows into from main valve inlet passage, then from main valve
Exit passageway is discharged, and this process makes the pressure in main valve decline, and now in pilot valve, pressure declines accordingly,
When in pilot valve, pressure is less than the setting pressure of pilot valve, pilot valve flap is under the effect of the elastic force of pilot valve spring
Closing, the pressure medium of main valve piston upper cavity gap at gap-clearance of piston rings enters plunger shaft lower chamber,
Flowing into Main valve outlet from conduit again, upper cavity distress resolves, main valve flap is at main spool spring power and main valve valve
Reset under the effect of medium under lobe closedown.
The present invention uses full-enclosed structure, is interconnected with main valve piston chamber by valve body of main valve by conduit,
The pressure medium making main valve piston intracavity is not emitted in air, but Main valve outlet passage is discharged, more
Safety and environmental protection, the operating mode making this valve be applicable to not to allow pressure medium externally to discharge；
Main valve valve gap and pilot valve valve body are connected into integral structure, make pilot valve discharge-channel and main valve
Directly being interconnected, compact conformation, the pressure loss between pilot valve and main valve is little, improves the action of valve
Sensitivity；
Pilot valve spring is installed on pilot valve valve stem top, and this just makes spring away from pressure medium, improves height
The stability of temperature operating mode lower spring rigidity, and due to pilot valve spring away from pressure medium farther out, so pilot valve bullet
Spring is susceptible to the impact of corrosive medium, extends service life, reduces cost.
Here description of the invention and application is illustrative, is not wishing to limit the scope of the invention to
Stating in embodiment, therefore, the present invention is not limited by the present embodiment, and any employing equivalence replacement obtains
Technical scheme is all in the scope of protection of the invention.
Claims (1)
1. a pilot operated safety valve, including main valve and pilot valve, wherein, described main valve includes valve body of main valve,
Main valve flap, main valve valve rod, main valve valve gap, main spool spring, piston, piston ring, filler and conduit,
Described pilot valve includes pilot valve pressure guiding pipe, pilot valve valve body, pilot valve flap, pilot valve valve rod, pilot valve valve gap, leads
Valve spring and fairlead；Described main valve valve gap is bolted on above valve body of main valve, described main valve valve
Being provided with main valve piston chamber in lid, described main valve valve rod runs through main valve valve gap and valve body of main valve, outside main valve valve rod
Be sequentially provided with main spool spring, filler and piston week from top to bottom, described main valve valve rod bottom be fixed on master
Main valve flap on valve body contacts, and described piston ring is coated on described piston outer periphery, and described piston sets
Putting in described plunger shaft, plunger shaft is separated into upper cavity and lower chamber, described lower chamber bottom is provided with
Media outlet, described valve body of main valve is provided with main valve inlet passage and Main valve outlet passage, described main valve inlet
Being provided with main dividing plate between passage and Main valve outlet passage, described main dividing plate is provided with main valve passage, described master
Valve flap is fixed on below described main valve passage, and described main valve inlet passage is provided with conduit access port, institute
Stating tube at one end to fix with media outlet, the other end is fixed on described conduit access port；Described pilot valve
Valve gap is arranged on the top of described pilot valve valve body, and described pilot valve valve rod runs through pilot valve valve gap and pilot valve valve body,
Described pilot valve stem outer circumference is sequentially provided with pilot valve spring and fairlead from top to bottom, pilot valve valve rod lower end with lead
Valve flap contacts, and described pilot valve spring is fixed on the top of described pilot valve valve rod, described pilot valve pressure guiding pipe
It is arranged on the bottom of described pilot valve valve body；Described main valve valve gap is provided with pilot valve discharge-channel, described main valve
Valve gap is linked into an integrated entity formula structure by bolt and pilot valve valve body, make pilot valve discharge-channel directly with main valve phase
Intercommunicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326459.0A CN104100747B (en) | 2014-07-09 | 2014-07-09 | A kind of pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326459.0A CN104100747B (en) | 2014-07-09 | 2014-07-09 | A kind of pilot operated safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104100747A CN104100747A (en) | 2014-10-15 |
| CN104100747B true CN104100747B (en) | 2017-01-04 |
Family
ID=51669153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410326459.0A Active CN104100747B (en) | 2014-07-09 | 2014-07-09 | A kind of pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104100747B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358917B (en) * | 2014-11-05 | 2017-03-01 | 北京航天石化技术装备工程有限公司 | The pilot operated safety valve controlling with individual gas sources |
| CN107763266A (en) * | 2016-08-18 | 2018-03-06 | 阿司米阀门有限公司 | A kind of low temperature resistant pilot operated safety valve of high temperature resistant |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6318406B1 (en) * | 2000-03-14 | 2001-11-20 | Tyco Flow Control, Inc. | Pilot operated relief valve |
| CN102313053B (en) * | 2011-08-17 | 2013-01-09 | 永一阀门集团有限公司 | Air suction type safety valve |
| CN203240030U (en) * | 2013-05-09 | 2013-10-16 | 浙江精嘉阀门有限公司 | Pilot-operated type safety relief valve |
| CN204062061U (en) * | 2014-07-09 | 2014-12-31 | 扬中市阀门厂有限公司 | A kind of Pilot operated safety valve |
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2014
- 2014-07-09 CN CN201410326459.0A patent/CN104100747B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104100747A (en) | 2014-10-15 |
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