CN202691185U - Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve - Google Patents
Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve Download PDFInfo
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- CN202691185U CN202691185U CN201220274925.1U CN201220274925U CN202691185U CN 202691185 U CN202691185 U CN 202691185U CN 201220274925 U CN201220274925 U CN 201220274925U CN 202691185 U CN202691185 U CN 202691185U
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Abstract
The utility model relates to a pressure rod trigger type high-pressure and low-pressure emergency shut-off valve, comprising the following main components: a valve body, a valve clack, a valve seat, a valve rod, a stopper, a valve cover, a long and thin rod, a rod cage, a rod cap, a spring, a slide rod and a reset nut, wherein the long and thin rod is a trigger component of the shut-off valve, and the valve is shut off through instability or slippage of the long and thin rod. According to the shut-off valve, when the pressure in the pipeline is higher than a high-pressure set value of the valve and when the pressure in the pipeline is lower than a low-pressure set value of the valve, the pipeline is shut off timely. When the pressure of the pipeline is higher than the high-pressure set value, a pressure rod of the long and thin rod is instable to trigger on-off of the valve; when the pressure of the pipeline is lower than the low-pressure set value, the slippage of the long and thin rod triggers the valve to shut off. The shut-off valve has the characteristics of high trigger precision, simple structure, high stability and convenience for reset.
Description
Technical field
The utility model relates to the high-pressure and low-pressure emergency shutdown valve that is used for ensureing station equipment or gas pipeline safety in the Gas Exploitation And Transmission well site.
Background technique
The safety shut-off valves of control rock gas output is installed on ground, Gas Exploitation And Transmission well site.This is because some fault of upstream line, valve or equipment can cause pipeline pressure to raise, thereby pipeline or the equipment in downstream is caused damage, even initiation potential; When the inefficacy of downstream line, valve or equipment or when breaking, can cause the reduction of pipeline pressure in addition, rock gas can be discharged in the atmosphere in this case, has both polluted atmosphere, has again the hidden danger that causes fire and blast and economic loss.The effect of well head safe shut-off valve is to be elevated to the high pressure setting value and when pipeline pressure drops to the low pressure setting value, can both in time to close natural gas line when pipeline pressure, thereby protection equipment reduces economic loss, reduces potential safety hazard.
Most well head safe shut-off valve has two kinds of structures: the first is by two independently valve series connection, and a valve turn-offs at high pressure, and another valve turn-offs in low pressure; The second forms by a valve with hydraulic control system two-part, each functional part of hydraulic control system is respectively independent installation, adopt pipeline to be connected between parts and the parts, so, the connecting tube line length between each parts, the situation that jointing is many have just been caused, so that potential leakage point showed increased.In addition, the moving element of shut-off valve itself is also more, and these factors all can cause the reliability decrease of whole shut-off valve system.
The model utility content
The purpose of this utility model provides a kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve.This shut-off valve can be realized being higher than the high pressure setting value and can both in time turn-offing pipeline when pipeline pressure being lower than the low pressure setting value when pipeline pressure.When it is higher than the high pressure setting value at pipeline pressure, triggered the shutoff of valve by the strut buckling of elongate rod; When it is lower than the low pressure setting value at pipeline pressure; The shutoff that triggers valve that skids off by elongate rod.This emergency shutdown valve has that triggering precision is high, simple in structure, good stability and the advantage such as convenient that resets.
The technical solution of the utility model is as follows:
A kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve, its critical piece comprises valve body, flap, valve seat, valve rod, block, valve gap, elongate rod, bar cage, pole cap, spring, slide bar and reduction nut etc.The working principle of valve is as follows: valve rod is subject to the effect of valve body inside and outside differential pressure, produces an axial force that makes progress.This axial force is delivered on the slide bar by elongate rod, the elongate rod upper end is contacted with slide bar, and produce frictional force.Under the nominal situation, the intrinsic axial force of elongate rod can support the axial force of valve rod, reaches balance between two forces.Frictional force between elongate rod upper end and the slide bar is enough to antagonistic spring to the spring-back force of slide bar simultaneously, makes the slide bar transfixion, and this moment, valve stayed open state.Under damage, when pipeline pressure surpassed valve high pressure setting value, the axial force that valve rod produces under the effect of valve body inside and outside differential pressure was greater than the intrinsic axially support power of elongate rod.Elongate rod generation this moment unstability, valve rod moves up under the promotion of inside and outside differential pressure simultaneously, and make flap enter valve seat and form sealing, thus throttle down.When pipeline pressure was lower than valve low pressure setting value, the frictional force between elongate rod upper end and the slide bar was less than the spring-back force of spring to slide bar, and slide bar slides to the right, and elongate rod is passed the hole on the slide bar, slipped into the pole cap upper end.This moment, valve rod lost the support force of elongate rod, moved up under the promotion of inside and outside differential pressure, and make flap enter valve seat and form sealing, thus throttle down.Wherein elongate rod is the trigger component of this shut-off valve, the unstability of elongate rod or skid off the shutoff that has realized valve.
The beneficial effects of the utility model are as follows:
1. can realize when pipeline pressure surpasses the high pressure setting value or is lower than the low pressure setting value can both Shuttoff Valve for depression bar flip-over type high-pressure and low-pressure emergency shutdown valve;
2. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve adopts elongate rod as trigger component, because the unstability of elongate rod is followed Euler's formula, so the utility model has higher triggering precision when pipeline pressure is higher than the high pressure setting value.
3. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve is simple in structure, only has two moving element-valve rods and slide bar, and valve rod and slide bar only do straight line motion, and its motion credibility and sealing reliability are higher.
4. namely replacing or the reseting procedure of elongate rod of the reseting procedure behind the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve breakdown.The whole process operation time is short, need not special tool(s), and is simple.
Description of drawings
The main structure of the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that accompanying drawing 1 relates to for the utility model;
Schematic diagram when the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that accompanying drawing 2 relates to for the utility model is worked under nominal situation;
The depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that accompanying drawing 3 relates to for the utility model is higher than setting value at pressure and triggers schematic diagram when turn-offing;
The depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that accompanying drawing 4 relates to for the utility model is lower than setting value at pressure and triggers schematic diagram when turn-offing;
Schematic diagram when the depression bar flip-over type high-pressure and low-pressure emergency shutdown valve that accompanying drawing 5 relates to for the utility model resets;
Embodiment
A kind of depression bar flip-over type high-pressure and low-pressure emergency shutdown 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, spring 10, slide bar 11 and reduction nut 12 etc.As shown in Figure 1.Wherein elongate rod 7 is trigger components of depression bar flip-over type high-pressure and low-pressure emergency shutdown valve.
Embodiment of the present utility model is: have radial hole on the pole cap 9, from then on slide bar 11 passes in the middle of the hole.Slide bar 11 1 ends are equipped with spring 10, have radial hole in the middle of the slide bar 11 in addition, and the size in this hole just in time can make elongate rod 7 pass through.Slide bar 11 the other ends are threaded, and reduction nut 12 is housed.The lower end of elongate rod 7 and valve rod 4 join, and the upper end withstands on the slide bar 11.Valve rod 4 one ends withstand on outside valve body 1 on the elongate rod 7, and the other end passes valve gap 6, block 5 and valve seat 3, and are connected with flap 2.Differential pressure action inside and outside the valve body 1 can form an axial force that makes progress that acts on the valve rod 4 on valve rod 4.
Under nominal situation, manifold pressure is in normal level, valve rod 4 is carried in thrust load on the elongate rod 7 less than the strut buckling ultimate load of elongate rod, elongate rod 7 keeps pressure bar stabilization, elongate rod 7 can support valve rod 4, frictional force between elongate rod 7 upper ends and the slide bar 11 is enough to the spring-back force of 10 pairs of slide bars 11 of antagonistic spring simultaneously, makes slide bar 11 transfixions.At this moment, medium can be by the pipeline downstream of the cavity flow between valve body 1 inner valve stem 4 and the valve seat 3, and valve stays open state.As shown in Figure 2.
Under damage, when pipeline pressure surpasses valve high pressure setting value, valve rod 4 is being carried in load on the elongate rod 7 greater than the strut buckling ultimate load of elongate rod 7 under the effect of valve body inside and outside differential pressure, strut buckling occurs in elongate rod 7, its effective length can diminish moment, valve rod 4 moves up under the promotion of valve body 1 inside and outside differential pressure, and make flap 2 enter valve seat 3 and form sealing, thus throttle down.As shown in Figure 3.
Under damage, when pipeline pressure was lower than valve low pressure setting value, the frictional force between elongate rod 7 upper ends and the slide bar 11 was less than the spring-back force of 10 pairs of slide bars 11 of spring, and slide bar 11 slides to the right, and elongate rod 7 is passed the hole on the slide bar 11, slips into pole cap 9 upper ends.This moment, valve rod 4 lost the support force of elongate rod 7, moved up under the promotion of inside and outside differential pressure, and make flap 2 enter valve seat 3 and form sealing, thus throttle down.As shown in Figure 4.
Resetting 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, the pressure of removal valve internal; (2) back out pole cap 9, reduction nut 12 is turned clockwise on earth, with spring 10 compressions; (3) valve rod 4 is pushed away downwards, satisfactory elongate rod 7 is installed, tighten pole cap 9; (4) check errorless after, open the upstream line valve; (5) reduction nut 12 is rotated counterclockwise to the end, this moment, depression bar flip-over type high-pressure and low-pressure emergency shutdown valve just reset to normal working.As shown in Figure 5.
Disclosed all features in this specification, or the step in disclosed all methods or the process except the special type and/or step of mutual repulsion, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is 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 the similar characteristics.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (3)
1. depression bar flip-over type high-pressure and low-pressure emergency shutdown 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), spring (10), slide bar (11) and reduction nut (12), it is characterized in that: when pipeline pressure is higher than the high pressure setting value, triggered the shutoff of valve by the strut buckling of elongate rod (7), when pipeline pressure is lower than the low pressure setting value by the shutoff that triggers valve that skids off of elongate rod (7).
2. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve according to claim 1, wherein when pipeline pressure surpasses valve high pressure setting value, under the effect of valve body inside and outside differential pressure, valve rod (4) is carried in load on the elongate rod (7) greater than the strut buckling ultimate load of elongate rod (7), strut buckling occurs in elongate rod (7), its effective length can diminish moment, valve rod (4) moves up under the promotion of valve body (1) inside and outside differential pressure, make flap (2) enter valve seat (3) and form sealing, thus throttle down.
3. depression bar flip-over type high-pressure and low-pressure emergency shutdown valve according to claim 1, wherein when pipeline pressure is lower than valve low pressure setting value, frictional force between elongate rod (7) upper end and the slide bar (11) is less than the spring-back force of spring (10) to slide bar (11), slide bar (11) slides to the right, elongate rod (7) is passed the hole on the slide bar (11), slip into pole cap (9) upper end, valve rod this moment (4) has lost the support force of elongate rod (7), under the promotion of inside and outside differential pressure, move up, make flap (2) enter valve seat (3) and form sealing, thus throttle down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220274925.1U CN202691185U (en) | 2012-06-08 | 2012-06-08 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220274925.1U CN202691185U (en) | 2012-06-08 | 2012-06-08 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
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| Publication Number | Publication Date |
|---|---|
| CN202691185U true CN202691185U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220274925.1U Expired - Lifetime CN202691185U (en) | 2012-06-08 | 2012-06-08 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
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| CN (1) | CN202691185U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486305A (en) * | 2012-06-08 | 2014-01-01 | 刘海亮 | Compression rod triggered type high-pressure and low-pressure emergency shutoff valve |
| 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 |
| CN105318057A (en) * | 2015-03-23 | 2016-02-10 | 刘海亮 | Novel membrane-assisting type compression bar instability trigger type valve assembly |
-
2012
- 2012-06-08 CN CN201220274925.1U patent/CN202691185U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486305A (en) * | 2012-06-08 | 2014-01-01 | 刘海亮 | Compression rod triggered type high-pressure and low-pressure emergency shutoff valve |
| CN103486305B (en) * | 2012-06-08 | 2016-09-07 | 江苏瑞朗博机械设备有限公司 | Depression bar flip-over type high-pressure and low-pressure emergency shutdown valve |
| 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 |
| CN105318057A (en) * | 2015-03-23 | 2016-02-10 | 刘海亮 | Novel membrane-assisting type compression bar instability trigger type valve assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU RUILANGBO MACHINERY EQUIPMENT CO., LTD. Free format text: FORMER OWNER: LIU HAILIANG Effective date: 20140919 Free format text: FORMER OWNER: WANG LEI WANG FUKAI Effective date: 20140919 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100076 DAXING, BEIJING TO: 211316 NANJING, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140919 Address after: 211316, No. 12 Tan Avenue, Gaochun Economic Development Zone, Nanjing, Jiangsu Patentee 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 Patentee before: Liu Hailiang Patentee before: Wang Lei Patentee before: Wang Fukai |
|
| DD01 | Delivery of document by public notice |
Addressee: Liu Hailiang Document name: Notification of Passing Examination on Formalities |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Jiangsu Ruilangbo Machinery Equipment Co.,Ltd. patent The person in charge Document name: Notice of Patent Expiration and Termination |