CN108105435A - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN108105435A CN108105435A CN201711328382.0A CN201711328382A CN108105435A CN 108105435 A CN108105435 A CN 108105435A CN 201711328382 A CN201711328382 A CN 201711328382A CN 108105435 A CN108105435 A CN 108105435A
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- bellows
- flap
- deck
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Abstract
The present invention relates to a kind of pilot operated safety valves, including main valve and pilot valve, main valve includes valve body, valve seat, flap, valve deck, bellows, pilot hole on the guide rod and guide sleeve at the flap back side moves cooperation, it is oriented to set upper side to be sealingly mounted between valve body and valve deck, pilot valve snout cavity is connected by pressure guiding pipe with main valve inlet passage；Control chamber mainly is formed between flap, bellows and valve deck, which connects with pilot valve snout cavity, and resetting spring is set between the guide rod and valve deck at the flap back side, and connection pilot hole and the balance hole on the inside of bellows are formed on guide sleeve top.When returning seat, pilot valve inlet side medium slowly enters control chamber and jointly flap is promoted to close with resetting spring, and slow stretching bellows during time seat is hardly damaged bellows, sealing reliability is good.
Description
Technical field
The invention belongs to valve field, especially with respect to a kind of bellows safety valve.
Background technology
Bellows safety valve is generally made of valve body, valve seat, flap, valve rod, valve deck, pressure setting device, and pressure is whole
Determine mechanism to be made of the spring and adjusting screw rod being mounted between valve rod and valve deck, valve rod lower end top pressure is in flap back center
Place, has the sealing surface with the mutual cooperation of valve seat upper surface in flap lower face, and ripple is set between road in the flap back side and valve body
Line tube sealing device, when valve body import pressure medium is more than spring force, flap pushes pressure of releasing open by medium, protects container pressure
Power safety.Its major defect is when flap returns seat, and time seat power that spring is acted on flap is larger, quick during seat is returned
Bellows is stretched, is easily damaged bellows, destroys corrugated tube sealing structure.
The content of the invention
The purpose of the present invention is being directed to shortcoming existing in the prior art, provide it is a kind of return during seat bellows impact compared with
It is small, the good pilot operated safety valve of sealing reliability.
Technical scheme includes main valve and pilot valve, and main valve includes valve body, valve seat, flap, valve deck, bellows, valve
Pilot hole on the guide rod and guide sleeve at the valve back side moves cooperation, is oriented to set upper side and is sealingly mounted between valve body and valve deck, leads
Valve snout cavity is connected by pressure guiding pipe with main valve inlet passage；Control chamber mainly is formed between flap, bellows and valve deck,
The control chamber is connected with pilot valve snout cavity, resetting spring is set between the guide rod and valve deck at the flap back side, on guide sleeve
Portion is formed with connection pilot hole and the balance hole on the inside of bellows.
It is an advantage of the invention that the control chamber that the flap back side is set is connected with pilot valve inlet side, the pilot valve inlet side when returning seat
Medium slowly enters control chamber and jointly flap is promoted to close with resetting spring, returns slow stretching bellows during seat, not rapid wear
Bad bellows, sealing reliability are good.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Specific embodiment
Pilot operated safety valve as shown in Figure 1, including main valve and pilot valve 9, main valve includes valve body 1, valve seat, flap 3, valve deck
8th, bellows 4, guide rod and the pilot hole on guide sleeve 5 at 3 back side of flap move cooperation, and 5 upper end of guide sleeve is sealingly mounted at valve
Between body 1 and valve deck 8,9 snout cavity of pilot valve is connected by pressure guiding pipe 2 with main valve inlet passage；In flap 3, bellows 4 and valve deck
Control chamber is formed between 8, which connects with 9 snout cavity of pilot valve, the control between the guide rod at 3 back side of flap and valve deck 8
Intracavitary processed sets resetting spring 6, and connection pilot hole and the balance hole of 4 inside of bellows, bellows 4 are formed on 5 top of guide sleeve
Upper end is welded on gasket 7, and the sealing of gasket 7 is fitted between guide sleeve 5 and valve body 1.Pressure setting device is arranged on pilot valve 9
Interior, when 9 inlet side pressure medium of pilot valve is higher than its set-pressure value, pilot valve 9 is opened, and main valve control cavity pressure is let out
It puts, flap 3 is opened under the promotion of 1 import pressure medium of valve body and released.When 1 import pressure medium of valve body be released to make pilot valve 9 into
When mouth lateral pressure is less than its set-pressure value, pilot valve 9 is closed, and inlet side pressure medium enters main valve control chamber, is resetting bullet
By 3 slowly closing of flap under the effect of spring 6.
Claims (1)
1. a kind of pilot operated safety valve, including main valve and pilot valve（9）, main valve include valve body（1）, valve seat, flap（3）, valve deck
（8）, bellows（4）, guide sleeve 5, pilot valve（9）Snout cavity passes through pressure guiding pipe（2）It is connected with main valve inlet passage；It is characterized in that
Flap（3）, bellows（4）And valve deck（8）Between form control chamber, the control chamber and pilot valve（9）Snout cavity connects, in flap
（3）The guide rod and valve deck at the back side（8）Between control chamber in set resetting spring（6）, in guide sleeve（5）Top is formed with connection
Pilot hole and bellows（4）The balance hole of inside, bellows（4）Upper end is welded on gasket（7）On, gasket（7）Sealing is fitted in
Between guide sleeve 5 and valve body 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328382.0A CN108105435A (en) | 2017-12-13 | 2017-12-13 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711328382.0A CN108105435A (en) | 2017-12-13 | 2017-12-13 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108105435A true CN108105435A (en) | 2018-06-01 |
Family
ID=62216701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711328382.0A Withdrawn CN108105435A (en) | 2017-12-13 | 2017-12-13 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108105435A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281886A (en) * | 2018-11-19 | 2019-01-29 | 北京宇航系统工程研究所 | A kind of electric-controlled type low temperature easing valve |
| CN110230717A (en) * | 2019-07-12 | 2019-09-13 | 乐山市前沿油气设备制造有限公司 | Pilot operated safety valve |
| CN113389933A (en) * | 2021-07-29 | 2021-09-14 | 四川长仪油气集输设备股份有限公司 | Multifunctional pilot operated safety valve |
-
2017
- 2017-12-13 CN CN201711328382.0A patent/CN108105435A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281886A (en) * | 2018-11-19 | 2019-01-29 | 北京宇航系统工程研究所 | A kind of electric-controlled type low temperature easing valve |
| CN110230717A (en) * | 2019-07-12 | 2019-09-13 | 乐山市前沿油气设备制造有限公司 | Pilot operated safety valve |
| CN113389933A (en) * | 2021-07-29 | 2021-09-14 | 四川长仪油气集输设备股份有限公司 | Multifunctional pilot operated safety valve |
| CN113389933B (en) * | 2021-07-29 | 2022-08-09 | 四川长仪油气集输设备股份有限公司 | Multifunctional pilot operated safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180601 |
|
| WW01 | Invention patent application withdrawn after publication |