CN103470215A - Compression bar buckling triggering type wellhead safety valve - Google Patents
Compression bar buckling triggering type wellhead safety valve Download PDFInfo
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- CN103470215A CN103470215A CN2012101865546A CN201210186554A CN103470215A CN 103470215 A CN103470215 A CN 103470215A CN 2012101865546 A CN2012101865546 A CN 2012101865546A CN 201210186554 A CN201210186554 A CN 201210186554A CN 103470215 A CN103470215 A CN 103470215A
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- compression bar
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- elongate rod
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Abstract
The invention aims to provide a compression bar buckling triggering type wellhead safety valve. According to the compression bar buckling triggering type wellhead safety valve, main parts comprise a valve body, a valve clack, a valve seat, a valve rod, a thin long rod, a rod cage and a rod cap, wherein the thin long rod is a triggering part of the valve and is designed according to a compression bar buckling principle. When a pressure in a pipeline is lower than a specific point, an axial force loaded on the thin long rod is less than a critical load of the thin long rod and a compression bar keeps stable; fluid can flow through a channel formed by the valve and the valve keeps an opened state. When the pressure in the pipeline is raised to be above the specific point, the axial force loaded on the thin long rod is higher than the critical load of the thin long rod and the buckling of the compression bar happens; the effective length of the thin long rod is reduced instantly; the axial force generated by the difference of inner and outer pressures of the valve rod enables the valve to generate axial movement to drive the valve clack to enter the valve seat to form sealing, so that the fluid is cut off and the valve is switched off. The valve is simple in structure and only one movable part is arranged, so that the precision and the safety of the wellhead safety valve are improved.
Description
Technical field
The present invention relates in the Gas Exploitation And Transmission well site for ensureing the well head safe shut-off valve of station equipment or gas pipeline safety and protection.
Background technology
The safety shut-off valves of controlling natural gas output is installed on ground, Gas Exploitation And Transmission well site; when underground throttle device lost efficacy; output the natural gas superpressure time; safety shut-off valves can be closed natural gas line automatically at specified pressure point; thereby avoid too high pressure to cause damage to pipeline or the equipment in downstream, play the effect of protection downstream line and equipment.
Most well head safe shut-off valve is comprised of shut-off valve and hydraulic control system two parts.Generally each functional part of hydraulic control system is independent installation the respectively, between parts and parts, adopts pipeline to be connected.So, just cause the tube connector line length between each parts, the situation that jointing is many, made potential leakage point showed increased.In addition, the moving component of shut-off valve itself is also more.These factors all can cause the reliability decrease of whole shut-off valve system.
Summary of the invention
The purpose of this invention is to provide a kind of novel well mouth release valve.This relief valve design, according to the strut buckling principle, is triggered the shutoff of valve by strut buckling, not only precision is high, and has saved the hydraulic control system of whole valve.Simultaneously, the structure of valve itself is also very simple, only has a moving component, has improved to a great extent precision and the reliability of well mouth release valve.
Technical scheme of the present invention is as follows:
A kind of strut buckling flip-over type well mouth release valve, its critical piece comprises valve body, flap, valve seat, valve rod, elongate rod, bar cage, pole cap etc., wherein elongate rod is the trigger unit of strut buckling flip-over type well mouth release valve.
The operating principle of valve is as follows: valve rod is subject to the effect of valve body inside and outside differential pressure, can produce an axial force, and this axial force will be carried on elongate rod.Under nominal situation, manifold pressure is lower than specified point, is carried in the critical load that axial force on elongate rod is less than elongate rod, and it is stable that depression bar keeps, and fluid can flow through the passage that valve forms, and valve is held open state.Under damage, pressure in pipeline is increased on specified point, the axial force be carried on elongate rod will be higher than the critical load of elongate rod, depression bar generation unstability, the effective length of elongate rod will reduce in moment, and the inside and outside differential pressure that valve rod is subject to and the axial force that produces will make valve rod produce to move axially, drive flap to enter valve seat and form sealing, block fluid, thus valve-off.
Elongate rod is the trigger unit of strut buckling flip-over type well mouth release valve, and whether itself can surpass specified point by the perception pipeline pressure, thereby unstability occurs when pipeline pressure surpasses specified point, triggers closing of valve.Elongate rod has replaced the hydraulic control system of the complexity used in current well mouth release valve on function.
Beneficial effect of the present invention is as follows: strut buckling flip-over type well mouth release valve adopts elongate rod as trigger unit, the unstability of elongate rod is followed Euler's formula, higher triggering precision is arranged, and this trigger unit has replaced the hydraulic control system of the complexity used in current well mouth release valve on function; Strut buckling flip-over type well mouth release valve is simple in structure, only has a moving component-valve rod, and valve rod only can do rectilinear motion along its axis direction, and its motion credibility and sealing reliability are higher; Reseting procedure after strut buckling flip-over type well mouth release valve triggers is the Renewal process of elongate rod namely, and the whole process operation time is short, and without special tool(s), simple.
The accompanying drawing explanation
The primary structure that accompanying drawing 1 is the strut buckling flip-over type well mouth release valve that the present invention relates to;
The schematic diagram that accompanying drawing 2 is worked during lower than specified point at pressure for the strut buckling flip-over type well mouth release valve that the present invention relates to;
The strut buckling flip-over type well mouth release valve schematic diagram when pressure higher than specified point trigger shutoff of accompanying drawing 3 for the present invention relates to.
The specific embodiment
A kind of strut buckling flip-over type well mouth release valve, its critical piece comprises valve body 1, flap 2, valve seat 3, valve rod 4, block 5, valve gap 6, elongate rod 7, bar cage 8 and pole cap 9, as shown in Figure 1.Wherein, elongate rod 7 is trigger units of strut buckling flip-over type well mouth release valve.
The specific embodiment of the present invention is: the upper end of valve rod 4 is connected with elongate rod 7, and valve rod 4 is through valve seat in the valve body chamber, and the lower end of valve rod 4 is connected with flap 2.When valve, during in opening, the cavity formed between valve rod 4 and valve seat 3 is the passage of medium circulation.The inside and outside pressure reduction of valve body 1 can produce an axial force made progress to valve rod 4, and this axial force is carried on elongate rod 7, and is delivered on pole cap 9 by elongate rod 7.
Under nominal situation, the pressure in valve body 1 is lower than specified point, and valve rod 4 is carried in the Buckling Load that axial load on elongate rod 7 is less than elongate rod 7, and elongate rod 7 keeps pressure bar stabilizations, the support force of elongate rod 7 will with the mutual balance of the axial force that valve rod 4 is subject to.Now, medium will be by the pipeline downstream of the cavity flow between valve body 1 inner valve stem 4 and valve seat 3, and valve is held open state, as shown in Figure 2.
Under damage, when the pressure in pipeline is elevated to the critical pressure of valve, the load that valve rod 4 is carried on elongate rod 7 will be over the Buckling Load of elongate rod 7, and unstability will occur elongate rod 7, and effective length shortened in moment.Valve rod 4 moves upward under the effect of valve body inside and outside differential pressure, drives piston flap 2 and enters valve seat 3, forms sealing, cuts off the upstream medium and continues to flow to downstream line, plays the effect of safe shutdown.As shown in Figure 3.
Strut buckling flip-over type well mouth release valve can be resetted as follows: (1) closes the valve of upstream line, the pressure of removal valve internal; (2) back out pole cap 9, take off the elongate rod 7 of unstability; (3) valve rod 4 is pushed back to the position before the elongate rod unstability; (4) elongate rod 7 more renewed, tighten pole cap; (5) check errorless after, open the upstream line valve, now strut buckling flip-over type well mouth release valve has just reset to opening.
Disclosed all features in this manual, or the step in disclosed all methods or process, except the special type and/or step of mutual repulsion, all can combine by any way.
Disclosed arbitrary feature in this manual (comprising any accessory claim, summary and accompanying drawing), unless special narration all can be replaced by other equivalence or the alternative features with similar purpose.That is,, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.
Claims (3)
1. a strut buckling flip-over type well mouth release valve, its critical piece comprises 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), it is characterized in that: the parts whether the control safety valve turn-offs are elongate rod (7), by the strut buckling triggering valve shutoff of elongate rod (7).
2. strut buckling flip-over type well mouth release valve according to claim 1, wherein when the valve internal pressure during lower than specified point, the load that elongate rod (7) is born is less than critical load and keeps pressure bar stabilization, valve rod (4) forms cavity through valve seat (3), this cavity is the passage of medium circulation, and valve is in opening.
3. strut buckling flip-over type well mouth release valve according to claim 1, wherein when the valve internal pressure during higher than specified point, the load that elongate rod (7) is born surpasses critical load and strut buckling occurs, its effective length moment reduces, valve rod (4) moves upward under the effect of valve body inside and outside differential pressure, drives piston flap (2) and enters valve seat (3), forms sealing, cut off the upstream medium and continue to flow to downstream line, valve closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101865546A CN103470215A (en) | 2012-06-08 | 2012-06-08 | Compression bar buckling triggering type wellhead safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101865546A CN103470215A (en) | 2012-06-08 | 2012-06-08 | Compression bar buckling triggering type wellhead safety valve |
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| Publication Number | Publication Date |
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| CN103470215A true CN103470215A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101865546A Withdrawn CN103470215A (en) | 2012-06-08 | 2012-06-08 | Compression bar buckling triggering type wellhead safety valve |
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| CN (1) | CN103470215A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847934A (en) * | 2014-02-17 | 2015-08-19 | 刘海亮 | Automatic valve triggered to act by instability of pressure rod under overpressure working condition |
| CN105318052A (en) * | 2015-02-17 | 2016-02-10 | 刘海亮 | Low-pressure working condition compression bar destabilizing trigger type pressure relief device |
| CN105443815A (en) * | 2015-02-28 | 2016-03-30 | 江苏瑞朗博机械设备有限公司 | Membrane auxiliary compression bar buckling trigger type automatic valve |
| CN107061815A (en) * | 2017-05-16 | 2017-08-18 | 江苏瑞朗博机械设备有限公司 | The diaphragm type pilot automatic valve triggered based on strut buckling |
| CN110017378A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Safe pressure relief device and method and purposes suitable for high pressure operating condition |
| CN110017391A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Safe pressure relief device and method and purposes suitable for low pressure operating condition |
| CN110131455A (en) * | 2019-05-08 | 2019-08-16 | 河北科技大学 | A kind of protection valve when decompression defective valve |
Citations (9)
| 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 |
| US6135134A (en) * | 1999-11-22 | 2000-10-24 | Taylor; Julian S. | Excess flow volume control valve |
| WO2001075340A2 (en) * | 2000-03-30 | 2001-10-11 | Bs & B Safety Systems, Inc. | Cartridge assembly for valve |
| CN101263327A (en) * | 2005-09-09 | 2008-09-10 | Bs&B安全体系有限公司 | Pressure relief device |
| CN201866262U (en) * | 2010-12-06 | 2011-06-15 | 苏州德兰能源科技有限公司 | Stop valve |
| CN202001685U (en) * | 2010-12-29 | 2011-10-05 | 江村 | Pressure-bearing rod bell jar valve clack sealing type safety valve |
| CN202731838U (en) * | 2012-06-08 | 2013-02-13 | 刘海亮 | Pressure rod destabilization triggered wellhead safe valve |
-
2012
- 2012-06-08 CN CN2012101865546A patent/CN103470215A/en not_active Withdrawn
Patent Citations (9)
| 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 |
| US6135134A (en) * | 1999-11-22 | 2000-10-24 | Taylor; Julian S. | Excess flow volume control valve |
| WO2001075340A2 (en) * | 2000-03-30 | 2001-10-11 | Bs & B Safety Systems, Inc. | Cartridge assembly for valve |
| CN101263327A (en) * | 2005-09-09 | 2008-09-10 | Bs&B安全体系有限公司 | Pressure relief device |
| CN201866262U (en) * | 2010-12-06 | 2011-06-15 | 苏州德兰能源科技有限公司 | Stop valve |
| CN202001685U (en) * | 2010-12-29 | 2011-10-05 | 江村 | Pressure-bearing rod bell jar valve clack sealing type safety valve |
| CN202731838U (en) * | 2012-06-08 | 2013-02-13 | 刘海亮 | Pressure rod destabilization triggered wellhead safe valve |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847934A (en) * | 2014-02-17 | 2015-08-19 | 刘海亮 | Automatic valve triggered to act by instability of pressure rod under overpressure working condition |
| CN105318052A (en) * | 2015-02-17 | 2016-02-10 | 刘海亮 | Low-pressure working condition compression bar destabilizing trigger type pressure relief device |
| CN105443815A (en) * | 2015-02-28 | 2016-03-30 | 江苏瑞朗博机械设备有限公司 | Membrane auxiliary compression bar buckling trigger type automatic valve |
| 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 |
| CN107061815A (en) * | 2017-05-16 | 2017-08-18 | 江苏瑞朗博机械设备有限公司 | The diaphragm type pilot automatic valve triggered based on strut buckling |
| CN110017378A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Safe pressure relief device and method and purposes suitable for high pressure operating condition |
| CN110017391A (en) * | 2018-01-09 | 2019-07-16 | 中国石油化工股份有限公司 | Safe pressure relief device and method and purposes suitable for low pressure operating condition |
| CN110131455A (en) * | 2019-05-08 | 2019-08-16 | 河北科技大学 | A kind of protection valve when decompression defective valve |
| CN110131455B (en) * | 2019-05-08 | 2023-12-19 | 河北科技大学 | Protective valve for failure of pressure reducing valve |
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Effective date of registration: 20160513 Address after: 211316, No. 12 Tan Avenue, Gaochun Economic Development Zone, Nanjing, Jiangsu Applicant after: JIANGSU RUILANGBO MECHANICAL 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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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20131225 |