CN103486305B - Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve - Google Patents
Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve Download PDFInfo
- Publication number
- CN103486305B CN103486305B CN201210189743.9A CN201210189743A CN103486305B CN 103486305 B CN103486305 B CN 103486305B CN 201210189743 A CN201210189743 A CN 201210189743A CN 103486305 B CN103486305 B CN 103486305B
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- valve
- pressure
- elongate rod
- rod
- slide bar
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- 230000001960 triggered effect Effects 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve, its critical piece includes valve body, flap, valve seat, valve rod, block, valve gap, elongate rod, bar cage, pole cap, spring, slide bar and reduction nut etc..Wherein elongate rod is the trigger unit of this shut-off valve, the unstability of elongate rod or skid off the shutoff achieving valve.This shut-off valve is capable of when manifold pressure can turn off pipeline in time higher than valve high pressure set point with when manifold pressure is less than valve low-pressure settings.It, when pipeline pressure is higher than high pressure set point, is triggered the shutoff of valve by the strut buckling of elongate rod；It is when pipeline pressure is less than low-pressure settings, by the shutoff skidding off triggering valve of elongate rod.This shut-off valve has triggering precision height, simple in construction, stability height and the features such as convenience that reset.
Description
Technical field
The present invention relates in Gas Exploitation And Transmission well site for ensureing airfield equipment or the high-pressure and low-pressure emergency shutdown of gas pipeline safety
Valve.
Background technology
The safety shut-off valves controlling natural gas output is installed on ground, Gas Exploitation And Transmission well site.This is because upstream line, valve
Or some fault of equipment can cause pipeline pressure to raise, thus the pipeline or equipment to downstream causes damage, even initiation potential；
Additionally when the inefficacy of downstream line, valve or equipment or when rupturing, the reduction of pipeline pressure can be caused, the most natural
Gas can be discharged in air, has both polluted air, there is again the hidden danger causing fire and blast, and cause economic loss.Well head
The effect of safety shut-off valves is when pipeline pressure is increased to high pressure set point and drops to low-pressure settings when pipeline pressure, can
Close natural gas line in time, thus protect equipment, reduce economic loss, reduce potential safety hazard.
Current most of well head safety shut-off valves has two kinds of structures: the first is connected by two independent valves, and a valve is at height
Pressure turns off, and another valve turns off in low pressure；The second forms by a valve with hydraulic control system two parts, hydraulic pressure control
Each functional part of system processed is independently installed, and uses pipeline to be attached between parts and parts, so,
Resulted in the connecting tube line length between each parts, situation that jointing is many so that potential leakage point showed increased.It addition,
The moving component of shut-off valve itself is the most more, and these factors all can cause the reliability decrease of whole shut-off valve system.
Summary of the invention
It is an object of the invention to provide a kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve.This shut-off valve is capable of when pipeline pressure
Power can turn off pipeline in time higher than high pressure set point with when pipeline pressure is less than low-pressure settings.It is higher than height at pipeline pressure
During pressure setting value, the strut buckling of elongate rod trigger the shutoff of valve；It is when pipeline pressure is less than low-pressure settings；By carefully
The shutoff skidding off triggering valve of stock.This emergency shutdown valve has triggering precision height, simple in construction, good stability and reset side
The advantage such as just.
Technical scheme is as follows:
A kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve, its critical piece include valve body, flap, valve seat, valve rod, block,
Valve gap, elongate rod, bar cage, pole cap, spring, slide bar and reduction nut etc..The operation principle of valve is as follows: valve rod is by valve
The effect of inside and outside pressure reduction, produces an axial force upwards.This axial force is delivered on slide bar by elongate rod, makes elongate rod
Upper end contacts with slide bar, and produces frictional force.Under nominal situation, the intrinsic axial force of elongate rod can support the axial force of valve rod,
Reach balance between two forces.Frictional force between elongate rod upper end and slide bar be enough to the screen resilience resisting spring to slide bar simultaneously, makes slide bar
Transfixion, now valve remains on.Under damage, when pipeline pressure exceedes valve high pressure set point,
The axial support force that the axial force that valve rod produces under the effect of valve body inside and outside differential pressure is intrinsic more than elongate rod.Now elongate rod occurs
Unstability, valve rod moves up under the promotion of inside and outside differential pressure simultaneously, makes flap enter valve seat and forms sealing, thus closes valve.
When pipeline pressure is less than valve low-pressure settings, the frictional force between elongate rod upper end and slide bar is less than the spring resilience to slide bar
Power, slide bar slides to the right, and elongate rod, through the hole on slide bar, slips into pole cap upper end.Now valve rod loses the support of elongate rod
Power, moves up under the promotion of inside and outside differential pressure, makes flap enter valve seat and forms sealing, thus closes valve.Wherein elongate rod
It is the trigger unit of this shut-off valve, the unstability of elongate rod or skid off the shutoff achieving valve.
Beneficial effects of the present invention is as follows:
1. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve can realize when pipeline pressure exceedes high pressure set point or sets less than low pressure
Can Shuttoff Valve during definite value；
2. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve employing elongate rod is as trigger unit, because the unstability of elongate rod follows Europe
Draw formula, so the present invention has higher triggering precision when pipeline pressure is higher than high pressure set point.
3. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve simple in construction, only two moving component one valve rods and slide bar, Er Qiefa
Bar and slide bar only move along a straight line, and its motion credibility and sealing reliability are higher.
4. reseting procedure after depression bar flip-over type high-pressure and low-pressure emergency shutdown valve breakdown i.e. the replacing of elongate rod or reseting procedure.
The whole process operation time is short, it is not necessary to special tool(s), simple.
Accompanying drawing explanation
Accompanying drawing 1 is the primary structure of the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that the present invention relates to；
Accompanying drawing 2 is the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that the present invention relates to schematic diagram when working in normal conditions；
Accompanying drawing 3 for the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that the present invention relates to when pressure triggers shutoff higher than setting value
Schematic diagram；
Accompanying drawing 4 for the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that the present invention relates to when pressure triggers shutoff less than setting value
Schematic diagram；
Accompanying drawing 5 is the schematic diagram during depression bar flip-over type high-pressure and low-pressure emergency shutdown valve reset that the present invention relates to；
Detailed description of the invention
A kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve, its critical piece include valve body 1, flap 2, valve seat 3, valve rod 4,
Block 5, valve gap 6, elongate rod 7, bar cage 8, pole cap 9, spring 10, slide bar 11 and reduction nut 12 etc..Such as Fig. 1 institute
Show.Wherein elongate rod 7 is the trigger unit of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve.
The detailed description of the invention of the present invention is: have radial hole on pole cap 9, and slide bar 11 can pass in the middle of this hole.Slide bar 11
One end, equipped with spring 10, additionally has radial hole in the middle of slide bar 11, and the size in this hole just can make elongate rod 7 pass through.Slide bar
11 other ends are threaded, and equipped with reduction nut 12.Lower end and the valve rod 4 of elongate rod 7 connect, and upper end withstands on slide bar 11
On.Valve rod 4 one end withstands in elongate rod 7 outside valve body 1, and the other end is through valve gap 6, block 5 and valve seat 3, and and flap
2 connect.Differential pressure action inside and outside valve body 1, on valve rod 4, can form an axial force upwards acted on valve rod 4.
In normal conditions, manifold pressure is in normal level, and the axial load that valve rod 4 is carried in elongate rod 7 is less than thin
The strut buckling critical load of stock, elongate rod 7 keeps pressure bar stabilization, elongate rod 7 can support valve rod 4, the most elongated
Frictional force between bar 7 upper end and slide bar 11 be enough to the screen resilience resisting spring 10 to slide bar 11, makes slide bar 11 transfixion.
Now, medium can be by the cavity flow downstream pipeline between valve body 1 inner valve stem 4 and valve seat 3, and valve remains on.
As shown in Figure 2.
Under damage, when pipeline pressure exceedes valve high pressure set point, valve rod 4 is under the effect of valve body inside and outside differential pressure
The load being carried in elongate rod 7 is more than the strut buckling critical load of elongate rod 7, and elongate rod 7 occurs strut buckling, and it has
Effect length can diminish moment, and valve rod 4 moves up under the promotion of valve body 1 inside and outside differential pressure, makes flap 2 enter valve seat 3 and is formed
Seal, thus close valve.As shown in Figure 3.
Under damage, when pipeline pressure is less than valve low-pressure settings, rubbing between elongate rod 7 upper end and slide bar 11
Wiping power is less than the spring 10 screen resilience to slide bar 11, and slide bar 11 slides to the right, and elongate rod 7 is through the hole on slide bar 11, sliding
Enter pole cap 9 upper end.Now valve rod 4 loses the support force of elongate rod 7, moves up, make valve under the promotion of inside and outside differential pressure
Lobe 2 enters valve seat 3 and forms sealing, thus closes valve.As shown in Figure 4.
The reset of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve can be carried out as follows: (1) closes the valve of upstream line, unloads
Pressure except valve internal；(2) back out pole cap 9, reduction nut 12 is turned clockwise on earth, spring 10 is compressed；(3) will
Valve rod 4 pushes down on, and installs satisfactory elongate rod 7, tightens pole cap 9；(4) check errorless after, open upstream line valve；
(5) reduction nut 12 being rotated counterclockwise to end, now depression bar flip-over type high-pressure and low-pressure emergency shutdown valve resets upon normal work
Make state.As shown in Figure 5.
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive special type
And/or beyond step, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), unless specifically stated otherwise,
All can be by other equivalence or there is the alternative features of similar purpose replaced.I.e., unless specifically stated otherwise, each feature is simply
An example in a series of equivalences or similar characteristics.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any new feature disclosed in this manual
Or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (3)
1. a depression bar flip-over type high-pressure and low-pressure emergency shutdown valve, its critical piece include valve body (1), flap (2), valve seat (3), valve rod (4),
Block (5), valve gap (6), elongate rod (7), bar cage (8), pole cap (9), spring (10), slide bar (11) and reduction nut (12), its bar
Having radial hole on cap (9), slide bar (11) can pass in the middle of this hole；Slide bar (11) one end equipped with spring (10),
Additionally having radial hole in the middle of slide bar (11), the size in this hole just can make elongate rod (7) pass through；Slide bar (11) other end with
Screw thread, and equipped with reduction nut (12)；Lower end and the valve rod (4) of elongate rod (7) connect, and upper end withstands on slide bar (11)；Valve rod (4)
One end withstands in elongate rod (7) outside valve body (1), and the other end is through valve gap (6), block (5) and valve seat (3), and connects with flap (2)
Connect；Differential pressure action inside and outside valve body (1), on valve rod (4), can form an axial force upwards acted on valve rod (4), and it is special
Levy and be: triggered the shutoff of valve by the strut buckling of elongate rod (7) when pipeline pressure is higher than high pressure set point, at pipeline pressure
Less than during low-pressure settings by elongate rod (7) skid off trigger valve shutoff.
Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve the most according to claim 1, wherein sets when pipeline pressure exceedes valve high pressure
During definite value, under the effect of valve body inside and outside differential pressure, the load that valve rod (4) is carried in elongate rod (7) is more than the pressure of elongate rod (7)
Bar Buckling Load, there is strut buckling in elongate rod (7), its effective length can diminish moment, and valve rod (4) is external pressure in valve body (1)
Move up under the promotion of difference, make flap (2) enter valve seat (3) and form sealing, thus close valve.
Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve the most according to claim 1, wherein sets less than valve low pressure when pipeline pressure
During definite value, the frictional force between elongate rod (7) upper end and slide bar (11) is less than the spring (10) screen resilience to slide bar (11), slide bar (11)
Sliding to the right, elongate rod (7), through the hole on slide bar (11), slips into pole cap (9) upper end, and now valve rod (4) loses elongate rod (7)
Support force, moves up under the promotion of inside and outside differential pressure, makes flap (2) enter valve seat (3) and forms sealing, thus closes valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210189743.9A CN103486305B (en) | 2012-06-08 | 2012-06-08 | Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210189743.9A CN103486305B (en) | 2012-06-08 | 2012-06-08 | Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103486305A CN103486305A (en) | 2014-01-01 |
| CN103486305B true CN103486305B (en) | 2016-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210189743.9A Expired - Fee Related CN103486305B (en) | 2012-06-08 | 2012-06-08 | Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103486305B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3137797B1 (en) * | 2014-05-02 | 2023-01-11 | BS&B Innovation Limited | Pressure release valve for oil recovery systems |
| CN105318052A (en) * | 2015-02-17 | 2016-02-10 | 刘海亮 | Low-pressure working condition compression bar destabilizing trigger type pressure relief device |
| CN105443815B (en) * | 2015-02-28 | 2019-02-19 | 江苏瑞朗博机械设备有限公司 | The automatic valve of diaphragm assist type strut buckling triggering type |
| CN104913090A (en) * | 2015-05-24 | 2015-09-16 | 徐州八方安全设备有限公司 | Low-pressure emptying type blasting needle valve |
| CN108692100A (en) * | 2018-05-22 | 2018-10-23 | 张文炳 | A kind of double-control valve of defective valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255617A (en) * | 1991-05-06 | 1992-11-11 | Julian S Taylor | High pressure fluid emergency shutoff valve. |
| US5373864A (en) * | 1992-07-30 | 1994-12-20 | Taylor; Julian S. | Downstream low fluid pressure emergency shutoff valve |
| US6058961A (en) * | 1999-09-14 | 2000-05-09 | Taylor; Julian S. | High pressure relief valve |
| CN101263327A (en) * | 2005-09-09 | 2008-09-10 | Bs&B安全体系有限公司 | Pressure relief device |
| CN202691185U (en) * | 2012-06-08 | 2013-01-23 | 刘海亮 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
-
2012
- 2012-06-08 CN CN201210189743.9A patent/CN103486305B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255617A (en) * | 1991-05-06 | 1992-11-11 | Julian S Taylor | High pressure fluid emergency shutoff valve. |
| US5373864A (en) * | 1992-07-30 | 1994-12-20 | Taylor; Julian S. | Downstream low fluid pressure emergency shutoff valve |
| US6058961A (en) * | 1999-09-14 | 2000-05-09 | Taylor; Julian S. | High pressure relief valve |
| CN101263327A (en) * | 2005-09-09 | 2008-09-10 | Bs&B安全体系有限公司 | Pressure relief device |
| CN202691185U (en) * | 2012-06-08 | 2013-01-23 | 刘海亮 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103486305A (en) | 2014-01-01 |
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Addressee: Wang Fukai Document name: the First Notification of an Office Action |
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Effective date of registration: 20160512 Address after: 211316, No. 12 Tan Avenue, Gaochun Economic Development Zone, Nanjing, Jiangsu Applicant after: JIANGSU RELIABLE MACHINERY EQUIPMENT Co.,Ltd. Address before: 100076 Beijing city Daxing District Jiugong Town Hall Road No. 15 No. 23 building 3 unit 1101 Applicant before: Liu Hailiang Applicant before: Wang Lei Applicant before: Wang Fukai |
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Granted publication date: 20160907 |