CN103470218A - Novel low-pressure triggering pressure lever instability shut-off valve - Google Patents
Novel low-pressure triggering pressure lever instability shut-off valve Download PDFInfo
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- CN103470218A CN103470218A CN2012101865917A CN201210186591A CN103470218A CN 103470218 A CN103470218 A CN 103470218A CN 2012101865917 A CN2012101865917 A CN 2012101865917A CN 201210186591 A CN201210186591 A CN 201210186591A CN 103470218 A CN103470218 A CN 103470218A
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Abstract
The invention relates to a novel low-pressure triggering pressure lever instability shut-off valve, which comprises the following main components: a valve body, a valve seat, a valve clack, a rotating shaft, a valve cover, a valve rod, a spring, a piston, an air cylinder, a slender rod, a rod cage, a rod cap and the like, wherein the slender rod is a triggering component for shutting off a valve, and is designed according to the principle of pressure lever instability. When the pressure in a pipeline is higher than a specified point, a supporting force borne by the slender rod is lower than the pressure lever instability critical load of the slender rod, a pressure lever is kept stable, a valve clack catch is clamped at the lower end of the valve rod, and the valve is kept to be in the open state. When the pressure in the pipeline is lower than the specified point, the axial load borne by the slender rod exceeds the pressure lever instability critical load of the slender rod, the pressure lever is instable, the effective length of the pressure lever is instantaneously reduced, and at the moment, the valve clack catch is separated from the lower end of the valve rod, the valve clack rotates around the rotating shaft under the action of gravity, and the valve is closed under the push of fluid. The valve is simple in structure, is only provided with three moving components, and is very higher in reliability.
Description
Technical field
The present invention relates in the Gas Exploitation And Transmission well site for ensureing the New Low Voltage flip-over type strut buckling shut-off valve of station equipment or gas pipeline safety and protection.
Background technology
The low pressure flip-over type well head safe shut-off valve of controlling natural gas output is installed on ground, Gas Exploitation And Transmission well site.This is that natural gas can be discharged in atmosphere in this case, has both polluted atmosphere because of downstream line, valve or the inefficacy of equipment or the reduction that fracture can cause pipeline pressure, exists and causes the hidden danger of fire and blast again, and cause economic loss.The effect of this safety shut-off valves is to close natural gas path when loine pressure drops to certain value, thereby reduces the leakage of natural gas, alleviates atmosphere pollution, reduces disaster hidden-trouble and economic loss.
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 traditional 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 New Low Voltage flip-over type strut buckling shut-off valve.This shut-off valve has been used for reference the structure of swing check valve, and it turn-offs trigger mechanism according to the strut buckling principle design, and the shutoff precision is high, and the valve circulation area can realize full-bore, and has saved the hydraulic control system of traditional similar valve.Simultaneously, valve itself simple in structure, only have three moving components, has higher reliability.
Technical scheme of the present invention is as follows:
A kind of New Low Voltage flip-over type strut buckling shut-off valve, its critical piece comprises valve body, valve seat, flap, rotating shaft, valve gap, valve rod, spring, piston, cylinder, elongate rod, bar cage, pole cap etc.The operating principle of valve is described below: valve rod is subject to the acting in conjunction of three power, is respectively the support force of elongate rod, the pressure of piston and the thrust of spring.Wherein the direction of the pressure of the support force of elongate rod and piston is downwards, the direction of the thrust of spring upwards, these three equilibrium of forces and unbalance be the factor that triggers valve open and close.When manifold pressure, during higher than specified point, the support force that elongate rod is born is lower than its strut buckling critical load, and it is stable that depression bar keeps.The thrust that these two downward power of the support force of elongate rod and the pressure of piston and spring make progress reaches balance, and the catch on flap is stuck in the lower end of valve rod, and valve stays open state.And valve can realize full-bore when opening, flow resistance is little, is easy to realize the cleaning of pipeline and valve.When the pressure in pipeline starts to descend, the pressure of piston also can descend thereupon, and spring force is constant, therefore the support force of elongate rod can increase along with the decline of pressure.When the pressure in pipeline is brought down below specified point, the axial load that elongate rod is born surpasses its strut buckling critical load, depression bar generation unstability, and its effective length can reduce moment.Now valve rod can move up under the thrust of spring, thereby the catch of flap breaks away from from the lower end of valve rod, flap under the effect of gravity around its rotating shaft rotation, and under the promotion of fluid valve-off.
Elongate rod is the trigger unit of New Low Voltage flip-over type strut buckling shut-off valve, itself can the perception pipeline pressure whether lower than specified point, thereby and unstability occurs in loine pressure during lower than specified point and triggers closing of valve.Elongate rod and spring have 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:
1. New Low Voltage flip-over type strut buckling shut-off valve adopts elongate rod as trigger unit, and the unstability of elongate rod is followed Euler's formula, and the present invention has higher triggering precision;
2. New Low Voltage flip-over type strut buckling shut-off valve has been used for reference the structure of swing check valve, can realize full-bore, flow resistance is little and easily realizes the cleaning of pipeline and valve;
3. New Low Voltage flip-over type strut buckling shut-off valve is simple in structure, only has three moving components---valve rod, flap and spring, and motion credibility and sealing reliability are higher;
4. the reseting procedure of New Low Voltage flip-over type strut buckling shut-off valve after the triggering Renewal process of elongate rod namely, whole process operation is simple, and the time is short, and without special tool(s), simple.
The accompanying drawing explanation
The primary structure that accompanying drawing 1 is the New Low Voltage flip-over type strut buckling shut-off valve that the present invention relates to;
The schematic diagram that accompanying drawing 2 is worked during higher than specified point at pressure for the New Low Voltage flip-over type strut buckling shut-off valve that the present invention relates to;
The New Low Voltage flip-over type strut buckling shut-off valve schematic diagram when pressure lower than specified point trigger shutoff of accompanying drawing 3 for the present invention relates to;
The schematic diagram that accompanying drawing 4 is the New Low Voltage flip-over type strut buckling shut-off valve reseting procedure that the present invention relates to.
The specific embodiment
A kind of New Low Voltage flip-over type strut buckling shut-off valve, its critical piece comprises valve body 1, valve seat 2, flap 3, rotating shaft 4, flap catch 5, valve gap 6, valve rod 7, spring 8, piston 9, cylinder 10, elongate rod 11, bar cage 12, pole cap 13, bolt 14 and the pole 15 that resets reset.As shown in Figure 1.Wherein elongate rod 11 and spring 8 are trigger units of New Low Voltage flip-over type strut buckling shut-off valve.
The specific embodiment of the present invention is: the upper end of valve rod 7 is connected with elongate rod 11, and valve rod 7 enters in valve body 1 through cylinder 10, piston 9, spring 8 and valve gap 6.Valve rod 7 has centre bore, and valve body 1 and cylinder 10 are communicated with, and the pressure of valve body 1 interior media can enter by the centre bore of valve rod 7 inner chamber of cylinder 10, and then piston 9 is formed to a downward active force.
When manifold pressure during higher than specified point, the support force that elongate rod 11 is born is lower than its strut buckling critical load, it is stable that depression bar keeps, the thrust that these two downward power of the pressure that the support force of elongate rod 11 and piston 9 are subject to and spring 8 make progress reaches balance, now flap catch 5 rests on the lower end of valve rod 7, flap 3 is hanged, and medium can pass through valve by full-bore.As shown in Figure 2.
When the pressure in pipeline starts to descend, the downward pressure that piston 9 is subject to also can descend thereupon.And the power of spring 8 is constant, therefore the support force of elongate rod 11 can increase along with the decline of pressure.When the pressure in pipeline is brought down below specified point, the axial load that elongate rod 11 is born surpasses its strut buckling critical load, depression bar generation unstability, and its effective length can reduce moment.Now valve rod 7 can move up under the thrust of spring 8, and valve rod 7 breaks away from flap catch 5, makes flap 3 lose support, causes flap 34 motions around the shaft, Shuttoff Valve under the promotion of fluid simultaneously under the effect of gravity.As shown in Figure 3.
New Low Voltage flip-over type strut buckling shut-off valve can be resetted as follows: (1) closes the valve of upstream line, the pressure of removal valve body 1 inside; (2) back out pole cap 13, take off the elongate rod 11 of unstability; (3) bolt 14 that resets is installed, when turning clockwise, hand rotation rotating shaft 4, hang flap 3; (4) be enough to install while resetting pole 15 when the distance between bar cage 12 and valve rod 7, the bolt 14 that resets that stops the rotation, and the pole 15 that will reset is in place; (5) be rotated counterclockwise the bolt 14 that resets until by its taking-up; (6) open the upstream line valve, make valve body 1 inner chamber pressurising; (7) new elongate rod is installed, and is screwed into pole cap 13; (8) continue again to twist two circles after pole cap 13 withstands elongate rod 11, take out the pole 15 that resets; (9) finally tighten pole cap 13, now New Low Voltage flip-over type strut buckling shut-off valve has just reset to normal operating conditions.As shown in Figure 4.
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 (6)
1. a New Low Voltage flip-over type strut buckling shut-off valve, its critical piece comprises valve body (1), valve seat (2), flap (3), rotating shaft (4), flap catch (5), valve gap (6), valve rod (7), spring (8), piston (9), cylinder (10), elongate rod (11), bar cage (12), pole cap (13), the bolt that resets (14) and the pole that resets (15), it is characterized in that: the parts whether the control shut-off valve turn-offs are elongate rod (11) and spring (8), by the strut buckling triggering valve shutoff of elongate rod (11).
2. New Low Voltage flip-over type strut buckling shut-off valve according to claim 1, wherein when pipeline pressure during higher than specified point, the support force that elongate rod 11 is born is lower than its strut buckling critical load, it is stable that depression bar keeps, the thrust that these two downward power of the pressure that the support force of elongate rod 11 and piston 9 are subject to and spring 8 make progress reaches balance, now flap catch 5 rests on the lower end of valve rod 7, and flap 3 is hanged, and medium can pass through valve by full-bore.
3. New Low Voltage flip-over type strut buckling shut-off valve according to claim 1, wherein when pipeline pressure during lower than specified point, the pressure of spring (8) makes elongate rod (11) that strut buckling occur, thereby triggers the shutoff of shut-off valve.
4. New Low Voltage flip-over type strut buckling shut-off valve according to claim 1, wherein the upper end of valve rod (7) is connected with elongate rod (11), and valve rod (7) enters in valve body (1) through cylinder (10), piston (9), spring (8) and valve gap (6).
5. New Low Voltage flip-over type strut buckling shut-off valve according to claim 1, wherein there is centre bore at valve rod (7) center, valve body (1) and cylinder (10) are communicated with, the pressure of valve body 1 interior media can enter the inner chamber of cylinder 10 by the centre bore of valve rod 7, make valve body (1) identical with the pressure in cylinder (10).
6. New Low Voltage flip-over type strut buckling shut-off valve according to claim 1, wherein the motion of flap (3) is rotatablely moving of (4) around the shaft, unlatching or shutoff that this rotatablely moves and has realized valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101865917A CN103470218A (en) | 2012-06-08 | 2012-06-08 | Novel low-pressure triggering pressure lever instability shut-off valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101865917A CN103470218A (en) | 2012-06-08 | 2012-06-08 | Novel low-pressure triggering pressure lever instability shut-off valve |
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| CN103470218A true CN103470218A (en) | 2013-12-25 |
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| CN2012101865917A Pending CN103470218A (en) | 2012-06-08 | 2012-06-08 | Novel low-pressure triggering pressure lever instability shut-off valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318088A (en) * | 2015-02-28 | 2016-02-10 | 刘海亮 | Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition |
| CN105422965A (en) * | 2015-02-17 | 2016-03-23 | 江苏瑞朗博机械设备有限公司 | Direct medium acting type automatic valve triggered through unstability of compression bar |
| CN105465431A (en) * | 2015-02-28 | 2016-04-06 | 江苏瑞朗博机械设备有限公司 | Modular design and pressure bar destabilizing trigger type relief valve under high pressure working condition |
| CN105465430A (en) * | 2015-02-17 | 2016-04-06 | 江苏瑞朗博机械设备有限公司 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
| CN110131455A (en) * | 2019-05-08 | 2019-08-16 | 河北科技大学 | A kind of protection valve when decompression defective valve |
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| 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 |
| WO2001075340A2 (en) * | 2000-03-30 | 2001-10-11 | Bs & B Safety Systems, Inc. | Cartridge assembly for valve |
| US20080083467A1 (en) * | 2006-10-06 | 2008-04-10 | Taylor Innovations, L.L.C. | Valve activation assembly which mechanically collapses a collapsible member in response to both overpressure and underpressure conditions |
| 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 |
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2012
- 2012-06-08 CN CN2012101865917A patent/CN103470218A/en active Pending
Patent Citations (8)
| 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 |
| 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 |
| US20080083467A1 (en) * | 2006-10-06 | 2008-04-10 | Taylor Innovations, L.L.C. | Valve activation assembly which mechanically collapses a collapsible member in response to both overpressure and underpressure conditions |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422965A (en) * | 2015-02-17 | 2016-03-23 | 江苏瑞朗博机械设备有限公司 | Direct medium acting type automatic valve triggered through unstability of compression bar |
| CN105465430A (en) * | 2015-02-17 | 2016-04-06 | 江苏瑞朗博机械设备有限公司 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
| CN105318088A (en) * | 2015-02-28 | 2016-02-10 | 刘海亮 | Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition |
| CN105465431A (en) * | 2015-02-28 | 2016-04-06 | 江苏瑞朗博机械设备有限公司 | Modular design and pressure bar destabilizing trigger type relief valve under high pressure working 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: 20160516 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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Application publication date: 20131225 |