CN201448500U - Automatic anti-spraying safety valve of adjustable gas pipeline - Google Patents
Automatic anti-spraying safety valve of adjustable gas pipeline Download PDFInfo
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- CN201448500U CN201448500U CN2009200253387U CN200920025338U CN201448500U CN 201448500 U CN201448500 U CN 201448500U CN 2009200253387 U CN2009200253387 U CN 2009200253387U CN 200920025338 U CN200920025338 U CN 200920025338U CN 201448500 U CN201448500 U CN 201448500U
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Abstract
An automatic anti-spraying safety valve of an adjustable gas pipeline is applicable for a high pressure gas transmission pipeline whose natural gas output volume needs regulating often. The valve can further regulate the limited flow capacity at any time and everywhere when satisfying reliability requirements, a main valve cavity and a regulating valve cavity are arranged in the valve body, a main valve core component is mounted in the main valve cavity for transmitting natural gas, the opening and the closing of the main valve cavity are controlled by a regulating valve core mounted in the regulating cavity, a regulating component is mounted in the regulating cavity for regulating the limited flow capacity of a main valve, and the regulating cavity is mounted in the high pressure gas transmission pipeline, and does not need a complex auxiliary detection system and a control system. The normal production is not influenced only when the gas flow rate is not bigger than the limited flow capacity in normal production, if pipeline behind the safety valve are leaked, and when the gas flow rate is bigger than the limited flow capacity, a safety valve is closed at once, a gas source is cut off, and normal production can be automatically restored after repairing pipelines. Limited flow capacity can be regulated at any time in a stepless way through rotating a regulation rod.
Description
Technical field
The utility model relates to the safety installations in a kind of High Pressure Gas Transmitting Pipeline, and the automatic blowout prevention safety valve of particularly a kind of adjustable burning line is applicable to that the natural gas transmission amount needs in the High Pressure Gas Transmitting Pipeline of often adjusting.
Background technique
Rock gas is a clean energy resource, and very important especially cheap industrial chemicals more and more is subject to people's attention.In each oil field, the world, the exploitation proportion of rock gas is increasing.Along with the expansion to construction of natural gas fields scale, the safe transport problem of rock gas more and more seems important.Because the high-pressure gas pipeline is in a single day out of control, its consequence is just hardly imaginable; Owing to the burn into of gas transmission line is aging, lawless person's reasons such as destruction, the leakage accident of high-pressure gas pipeline can not be avoided fully.Along with the reinforcement of safe production awareness, especially in the marine oil and gas exploitation, the safety installations in the oil gas conveying equipment more and more is subjected to people's great attention.
For this reason, be necessary to design the automatic blowout prevention safety valve of a kind of burning line, it is installed in the High Pressure Gas Transmitting Pipeline, during ordinary production, do not influence ordinary production; When if throughput increases (as a large amount of robber's gas, pipeline explosion, gate valve out of control etc.) suddenly in the gas transmission line after the safety valve, this valve can cut out immediately automatically, block source of the gas, the expansion of prevention accident and spreading, reduce causality loss to greatest extent, leave time enough for the reparation of line equipment.
At present advanced automatically controlled, hydraulic control or gas control automatic safety device can in time automatically be closed, and cut off source of the gas, but it must possess sensitive auxiliary electrical liquid (gas) control system reliably of a cover.In case a certain link of system breaks down, will make whole device malfunctioning; And accidental pipeline leakage accident also not necessarily took place once in 1 year or several years, and long-term environmental attack and gerentocratic thought are benumbed to make and kept the sensitive work reliably of whole system to become difficult.
We had once succeeded in developing the automatic blowout prevention safety valve of burning line (number of patent application 2008201047931) of pure machinery control in the past, complicated assisted detection system and control system have been saved, reduced most sources of trouble, the reliability of safety valve is improved greatly, but its limited flow rate is regulated classification, can not carry out step-less adjustment, and all dismountings when regulating, regulate limited flow rate with the method for changing spring, can not satisfy the requirement of regulating limited flow rate at any time.
Summary of the invention
For when satisfying the reliability requirement, can also regulate limited flow rate whenever and wherever possible.The purpose of this utility model is to provide a kind of adjustable burning line automatic blowout prevention safety valve, and it is without any need for the assisted detection system and the control system of complexity, and step-less adjustment limited flow rate whenever and wherever possible.It is installed in the High Pressure Gas Transmitting Pipeline, and when ordinary production, as long as throughput is not more than its limited flow rate, safety valve is inoperative, does not influence ordinary production; No matter when, which kind of reason makes the later pipeline of safety valve that spray take place to leak, safety valve cuts out immediately, cuts off source of the gas, thereby avoids the expansion of accident and spread, and reserves time enough to accident treatment, and can return to normal production automatically after fixing pipeline.
Technical solution of the present utility model is: design the automatic blowout prevention safety valve of a kind of adjustable burning line, as shown in drawings. mainly form by valve body, main valve plug, valve seat, valve core spring, regulating spool cone, guide rod, pressure cap, Regulation spring, adjustable lever, high pressure combination seal, seal pressure cap, plug, bleed screw, it is characterized in that: valve inner has main valve chamber and regulates valve pocket, primary valve part is housed respectively and regulates part; Primary valve part mainly is made up of main valve plug, valve seat, valve core spring, and the main valve plug hypomere is a cone, cooperates with the valve seat with corresponding taper hole, forms sealing; Epimere and stage casing are cylindrical body, and the epimere cross-section area is long-pending greater than the water cross section of hypomere cone, and and valve body between be bigger Spielpassung, it play the guiding role on the one hand, allow a small amount of air communication to cross matching gap on the other hand, enter and regulate the chamber, form the control air-flow; Valve core spring is contained between main valve plug and the plug, and main valve plug is sitting on the main valve seat, closes power for main valve plug provides during work; Primary valve part is born the main task of transport gas, and its open and close are by being contained in the regulating spool control of regulating in the chamber; Regulating part mainly is made up of regulating spool cone, guide rod, pressure cap, Regulation spring, adjustable lever, high pressure combination seal; The regulating spool bottom is a cone, and internal thread is arranged at top, is threaded with guide rod; Guide rod is contained in the hole of adjustable lever, and there is shoulder the upper end, is bearing on the pressure cap by Regulation spring; Pressure cap is threaded with adjustable lever; The adjustable lever bottom is a cylindrical shell, and the middle part shoulder is processed with outside thread, with valve body being threaded, the gap size between the taper hole on cone and the corresponding valve body is regulated by rotary regulating lever; Adjustable lever top is smooth cylindrical body, and the upper end is processed as tetragonal prism, so that use spanner to regulate; Seal pressure cap is threaded with valve body; To regulate part and bearing the task of controlling the main valve switch. the bleed screw with bleeder port are contained on the plug.
If this safety valve is connected in the gas transmission line, when entering the mouth from safety valve, high pressure draught enters, as shown in drawings.The gap that the part air communication is crossed main valve plug epimere and main valve chamber internal surface enters the adjusting valve pocket, forms the control air-flow, and the restriction A that the control air communication is overregulated under the valve core cone enters the safety valve outlet.During proper functioning, the pressure that dams on mouthful A falls very little, the upper and lower end pressure of main valve plug almost is the low pressure of outlet, and the high pressure of inlet acts on the upper and lower two sections upper and lower end face of main valve plug simultaneously, because the cylindrical end area of epimere is greater than the hypomere cone, what pressure reduction formed makes a concerted effort upwards, makes spool overcome spring force and self gravitation upwardly opens, main air flow by safety valve, enters the ordinary production state smoothly.Need only the set flow that is not more than safety valve by the flow of safety valve, safety valve just can not cut out, and keeps ordinary production.Because it is identical with the pressure reduction of control air-flow to form main air flow, so the flow of main air flow and control air-flow is in proportion.
When the gas transmission line behind the safety valve took place to leak, the safety valve outlet pressure descended, and by the flow increase of safety valve, the pressure reduction up and down of regulating spool increases thereupon.When flow during greater than the set flow of safety valve, the active force of formed pressure reduction (being called shut off differential pressure) makes regulating spool overcome the elastic force of Regulation spring, the descending restriction A that closes blocks the control air-flow, thereby makes main valve plug upper-end surface pressure be elevated to inlet pressure.This moment, the main valve plug upper-end surface acted on high pressure, and the lower end surface is acting on low pressure, and under the effect of pressure reduction, main valve plug is descending, closes whole gas circuits.
After pipeline was repaired, if the safety valve outlet pressure returns to normal back pressure, regulating spool was opened under the tension force effect of Regulation spring automatically, returns to normal production.If back pressure is too low in the outlet line, perhaps pressure is too high in the suction line, when regulating spool can not be opened automatically, gate valve (requiring safety valve to be right after) before should first closed safe valve in the gate valve back, unscrew bleed screw then, lay down the valve internal pressure, regulating spool is opened under spring tension automatically; Screw bleed screw after regulating spool is opened, slowly open gate valve, can resume production.
Can make that regulating spool is descending, power that close restriction A is the pressure reduction up and down of regulating spool; And this pressure reduction is that suffered resistance forms when crossing restriction A by the control air communication, and its size depends on area of passage and the flow of restriction A, area of passage one timing, and it is also certain to form the needed flow of shut off differential pressure; Area of passage increases, and forms the needed flow of shut off differential pressure and also increases, otherwise then reduce; And the size of this area of passage depends on the size in the slit of regulating spool and taper hole; Because control air-flow and main air flow are proportional, be the gap size of regulating regulating spool and taper hole so regulate the key of this valve limited flow rate; So back-out or precession adjustable lever just can make the limited flow rate of this valve become big or diminish.
The beneficial effects of the utility model are without any need for the assisted detection system and the control system of complexity, can regulate limited flow rate whenever and wherever possible according to producing needs.It is installed in the High Pressure Gas Transmitting Pipeline, and when ordinary production, safety valve is inoperative, does not influence ordinary production; Leak when spray takes place the later pipeline of safety valve, safety valve cuts out immediately, cuts off source of the gas, thereby avoids the expansion of accident and spread, and reserves time enough to accident treatment, and can return to normal production automatically after fixing pipeline.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing is a structural representation of the present utility model.
Label representative among the figure: 1-valve body, 2-main valve plug, 3-valve seat, 4-valve core spring, 5-regulating spool cone, the 6-guide rod, 7-pressure cap, 8-Regulation spring, 9-adjustable lever, 10-high pressure combination seal, the 11-seal pressure cap, the 12-plug, the 13-bleed screw, → be airflow direction, the A-restriction.
Embodiment
In the accompanying drawings, valve body 1 inside has main valve chamber and regulates valve pocket, primary valve part is housed respectively and regulates part.
Primary valve part mainly is made up of main valve plug 2, valve seat 3, valve core spring 4, is installed in the main valve chamber of valve body 1 and plug 12 formation; Main valve plug 2 hypomeres are cone, and epimere and stage casing are cylindrical body, and the epimere cross-section area is long-pending greater than the water cross section of hypomere cone, and and valve body between be bigger Spielpassung; Valve core spring 4 is contained between main valve plug 2 and the plug 12, and its effect is the frictional force when overcoming 2 times horizontal resets of main valve plug.
Regulate part and mainly form, be installed in the adjusting valve pocket that forms by valve body 1 and seal pressure cap 11 by regulating spool cone 5, guide rod 6, pressure cap 7, Regulation spring 8, adjustable lever 9, high pressure combination seal 10; Regulating spool cone 5 bottoms are cone, and internal thread is arranged at top, are threaded with guide rod 6; Guide rod 6 is contained in the hole of adjustable lever 9, and there is shoulder the upper end, is bearing on the pressure cap 7 by Regulation spring 8; Pressure cap 7 is threaded with adjustable lever 9, defines the working position of Regulation spring 8; Adjustable lever 9 bottoms are cylindrical shell, and the middle part shoulder is processed with outside thread, are threaded with valve body 1; Top is smooth cylindrical body, forms sealing with high pressure combination seal 10, and the upper end is processed as tetragonal prism, so that use spanner to regulate; Seal pressure cap 11 is threaded with valve body 1, so that compress high pressure combination seal 10; Bleed screw 13 with bleeder port are contained on the plug 12, and purpose is to give pressure release in the valve under special circumstances.
This safety valve is connected in the gas transmission line, when high pressure draught when safety valve inlet enters, the gap that the part air communication is crossed main valve plug 2 epimeres and main valve chamber internal surface enters the adjusting valve pocket, forms the control air-flow, the control air communication is crossed restriction A and is entered safety valve and export.During proper functioning, the pressure that dams on mouthful A falls very little, the upper and lower end pressure of main valve plug 2 almost is the low-pressure of outlet, and the high pressure of inlet acts on the upper and lower two sections upper and lower end face of main valve plug 2 simultaneously, because the cylindrical sectional area of epimere is greater than the hypomere cone, what pressure reduction formed makes a concerted effort upwards, makes main valve plug 2 overcome spring force and self gravitation upwardly opens, main air flow by safety valve, enters the ordinary production state smoothly.Need only the limited flow rate that is not more than safety valve by the flow of safety valve, safety valve just can not cut out, and keeps ordinary production.Because it is identical with the pressure reduction of control air-flow to form main air flow, so the flow of main air flow and control air-flow is in proportion.
When the gas transmission line behind the safety valve took place to leak, the safety valve outlet pressure descended, and by the flow increase of safety valve, the pressure reduction up and down of regulating spool cone 5 increases thereupon.When flow during greater than the set flow of safety valve, the active force that formed pressure reduction (being called shut off differential pressure) causes makes regulating spool cone 5 overcome the elastic force of Regulation spring 8, the descending restriction A that closes blocks the control air-flow, thereby makes main valve plug 2 upper-end surface pressure be elevated to inlet pressure.This moment, main valve plug 2 upper-end surfaces acted on high pressure, and the lower end surface is acting on low-pressure, and under the effect of pressure reduction, main valve plug 2 is descending, closes whole gas circuits.
After pipeline is repaired, if the safety valve outlet pressure returns to normal back pressure, regulating spool cone 5 is opened under the tension force effect of Regulation spring 8 automatically, if return to normal production. back pressure is too low in the outlet line, and perhaps pressure is too high in the suction line, when regulating spool cone 5 can not be opened automatically, gate valve (requiring safety valve to be right after) before should first closed safe valve in the gate valve back, unscrew bleed screw 13 then, lay down the valve internal pressure, regulating spool cone 5 is opened under spring tension automatically; Screw bleed screw 13 after regulating spool cone 5 is opened, the gate valve before slowly opening the safety-valve can resume production.
Screw out or precession adjustable lever 9, change the size of mouthful A that dams, the limited flow rate of this valve is become greatly or diminish.
Claims (2)
1. automatic blowout prevention safety valve of adjustable burning line, mainly form by valve body, main valve plug, valve seat, valve core spring, regulating spool cone, guide rod, pressure cap, Regulation spring, adjustable lever, high pressure combination seal, seal pressure cap, plug, bleed screw, it is characterized in that: valve inner has main valve chamber and regulates valve pocket, primary valve part is housed respectively and regulates part; Primary valve part mainly is made up of main valve plug, valve seat, valve core spring, and the main valve plug hypomere is a cone, and epimere and stage casing are cylindrical body, and the epimere cross-section area is long-pending greater than the water cross section of hypomere cone, and and valve body between be bigger Spielpassung; Valve core spring is contained between main valve plug and the plug; Regulating part mainly is made up of regulating spool cone, guide rod, pressure cap, Regulation spring, adjustable lever, high pressure combination seal; The regulating spool bottom is a cone, and internal thread is arranged at top, is threaded with guide rod; Guide rod is contained in the hole of adjustable lever, and there is shoulder the upper end, is bearing on the pressure cap by Regulation spring; Pressure cap is threaded with adjustable lever; The adjustable lever bottom is a cylindrical shell, and the middle part shoulder is processed with outside thread, with valve body to be threaded; Top is smooth cylindrical body, and the upper end is processed as tetragonal prism, so that use spanner to regulate; Seal pressure cap is threaded with valve body; Bleed screw with bleeder port are contained on the plug.
2. the automatic blowout prevention safety valve of adjustable burning line according to claim 1 is characterized in that: the gap size that changes regulating spool cone and taper hole by rotary regulating lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200253387U CN201448500U (en) | 2009-05-13 | 2009-05-13 | Automatic anti-spraying safety valve of adjustable gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200253387U CN201448500U (en) | 2009-05-13 | 2009-05-13 | Automatic anti-spraying safety valve of adjustable gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201448500U true CN201448500U (en) | 2010-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200253387U Expired - Fee Related CN201448500U (en) | 2009-05-13 | 2009-05-13 | Automatic anti-spraying safety valve of adjustable gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201448500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN110864147A (en) * | 2019-11-26 | 2020-03-06 | 北京北燃环能科技发展有限公司 | Cut-adjusting integrated pressure regulator and integrated gas pressure regulating core |
-
2009
- 2009-05-13 CN CN2009200253387U patent/CN201448500U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN103437916B (en) * | 2013-08-30 | 2015-10-14 | 东风商用车有限公司 | Anti-backfire safety valve of engine |
| CN110864147A (en) * | 2019-11-26 | 2020-03-06 | 北京北燃环能科技发展有限公司 | Cut-adjusting integrated pressure regulator and integrated gas pressure regulating core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20130513 |