CN105318088A - Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition - Google Patents
Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition Download PDFInfo
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- CN105318088A CN105318088A CN201510091251.XA CN201510091251A CN105318088A CN 105318088 A CN105318088 A CN 105318088A CN 201510091251 A CN201510091251 A CN 201510091251A CN 105318088 A CN105318088 A CN 105318088A
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- valve
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- strut buckling
- temperature switch
- pressure
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Abstract
The invention discloses a low-temperature valve triggered by compression bar destabilizing to act under the overpressure working condition. Main components of the low-temperature valve comprises a pneumatic actuator, a support, a low-temperature switch valve, a pressure-leading pipe, a compression bar destabilizing trigger type reversing valve, a slender bar, an air storage tank, a check valve and instrument wind pipelines. When the pressure came from the upstream of the pneumatic valve is higher than a set point, the load on the slender bar exceeds the critical load and the slender bar is destabilized and bent, so that the effective length of the slender bar is decreased momentarily; the thrust, acted on a valve core of the destabilizing trigger type reversing valve, of the slender bar is decreased suddenly, the valve core is pushed by the medium pressure, and an internal channel of the compression bar destabilizing trigger type reversing valve is made to change; at this moment, instrument wind enters the pneumatic actuator in a required mode that the valve is changed to be in an abnormal valve location, and the low-temperature switch valve is changed to be in an abnormal valve location from a normal valve location through the pneumatic actuator. The low-temperature valve can serve as an emergence relief device or an emergency shutoff device.
Description
Technical field
The present invention relates to a kind of valve, relate to a kind of worst cold case valve can automatically opened when pressure exceedes setting value or close more specifically.
Background technique
In order to protect device and the equipment of pressure piping, pressurized container and their upstream and downstream, the valve can automatically opened or close under often needing to be arranged on superpressure operating mode.In practice in the past, pressure in usual use pressure transmitter detected pressures pipeline or pressurized container, pressure transmitter outputs signal to control system, when pressure exceedes setting value, control system can send instruction and change the power supply state being installed on the solenoid valve of pneumatic actuator supply air line, and then change the state of solenoid valve air-flow path, thus make pneumatic actuator action, reach the object of unlatching or throttle down.
Use pressure transmitter, solenoid valve, pneumatic actuator, main valve and control system jointly to realize the main potential risk of automatic on-off valve under superpressure operating mode to be, if pressure transmitter lost efficacy, or the Signal transmissions between pressure transmitter and control system goes wrong, or the power supply of solenoid valve goes wrong, just may occur that pressure exceedes setting pressure, pneumatic actuator does not but make the situation of main valve action as scheduled, brings threat to the device of pressure piping, pressurized container and their upstream and downstream and equipment.
The present invention is primarily of parts compositions such as pneumatic actuator, support, low-temperature switch valve, pressure inlet tube, strut buckling flip-over type selector valve, elongate rod, gas tank, one-way valve and instrument airduct lines.Wherein, the design of strut buckling flip-over type selector valve is based on the principle of pressure bar stabilization and strut buckling.Strut buckling flip-over type selector valve bears pressure medium.When pressure medium is greater than setting value, strut buckling flip-over type selector valve changes the direction that instrument wind drives pneumatic actuator, thus the automatic unlatching of low temperature switch valve or closedown under achieving superpressure operating mode.In this application, the function of pressure transmitter, solenoid valve and control system three is achieved based on the strut buckling flip-over type selector valve of pressure bar stabilization and strut buckling principle design.
Through looking into, the Subzero valve of auto-action under superpressure operating mode designed based on pressure bar stabilization and strut buckling principle at present.
Summary of the invention
By the Subzero valve of strut buckling trigger action under the superpressure operating mode that the present invention relates to, its critical piece comprises the parts such as pneumatic actuator 1, support 2, low-temperature switch valve 3, pressure inlet tube 4, strut buckling flip-over type selector valve 5, elongate rod 6, gas holder 7, one-way valve 8 and instrument airduct line 9.
Wherein, the function of pressure inlet tube 4 is connected by the cavity of the upstream medium of low-temperature switch valve 3 with strut buckling flip-over type selector valve 5, makes the spool of strut buckling flip-over type selector valve 5 bear the load produced from low-temperature switch valve 3 upstream pressure medium.This load will be passed to elongate rod 6, make elongate rod 6 bear one and the linear positively related thrust load of low-temperature switch valve 3 upstream pressure medium.
When the pressure coming low-temperature switch valve 3 upstream is lower than set point, the load that elongate rod 6 is born is less than ultimate load and keeps stable, the end thrust of elongate rod 6 makes the spool of strut buckling flip-over type selector valve 5 be in working position one, and now instrument wind enters pneumatic actuator 1 according to making low-temperature switch valve 3 keep the mode of normal valve position state to flow through strut buckling flip-over type selector valve 5.
When the pressure from pneumatic valve upstream is higher than set point, the load that elongate rod 6 is born will exceed ultimate load and unstability bends, now its effective length can significantly diminish moment, its thrust acted on the spool of unstability flip-over type selector valve 5 can reduce suddenly, spool under pressure medium can promote action to working position two, now the inner passage of strut buckling flip-over type selector valve 5 can change, instrument wind is made to enter pneumatic actuator 1 according to the mode making valve change into required for improper valve position state, pneumatic actuator 1 can make low-temperature switch valve 3 change into improper valve position (if pneumatic valve is in standard-sized sheet position under nominal situation by normal valve position, then under superpressure operating mode, pneumatic valve should be closed automatically, valve position becomes complete shut-down position, if pneumatic valve is in complete shut-down position under nominal situation, then under superpressure operating mode, pneumatic valve should be opened automatically, and valve position becomes standard-sized sheet position), thus achieve automatic unlatching or the closedown of superpressure operating mode lower valve.
No matter spool is in working position one or working position two, medium from low-temperature switch valve 3 upstream in strut buckling flip-over type selector valve 5 all can not flow through strut buckling flip-over type selector valve 5, and the fluid namely in pressure inlet tube 4 and strut buckling flip-over type selector valve 5 is in immobilising state all the time.
Wherein, the length of pressure inlet tube 4 is not less than 250mm, with to ensure between strut buckling flip-over type selector valve 5 and cryogenic media and between form the isolation gas column of sufficient length, make temperature in strut buckling flip-over type selector valve 5 cavity by the impact of cryogenic media, only determined by ambient temperature.
Pneumatic actuator 1 is connected by instrument airduct line 9 with between gas holder with strut buckling flip-over type selector valve 5 and strut buckling flip-over type selector valve 5.Gas holder 7 ingress is provided with one-way valve 8, makes instrument wind can only flow into gas tank 7, can not reflux.Even if thus ensure that when supply fault appears in the instrument wind of factory system, still can store the instrument wind of certain pressure and volume in gas holder 7, these instrument wind can drive pneumatic actuator 1 to open or close low-temperature switch valve 3.
Accompanying drawing explanation
Fig. 1 is the main structure figure by the Subzero valve of strut buckling trigger action under the superpressure operating mode that the present invention relates to;
Fig. 2 is schematic diagram when normally being worked by the Subzero valve of strut buckling trigger action under the superpressure operating mode that the present invention relates to;
Fig. 3 is the schematic diagram after being triggered by the Subzero valve of strut buckling trigger action under the superpressure operating mode that the present invention relates to;
Embodiment
By the Subzero valve of strut buckling trigger action under superpressure operating mode, critical piece comprises the parts such as pneumatic actuator 1, support 2, low-temperature switch valve 3, pressure inlet tube 4, strut buckling flip-over type selector valve 5, elongate rod 6, gas holder 7, one-way valve 8 and instrument airduct line 9.See Fig. 1.
The function of pressure inlet tube 4 is connected by the cavity of the upstream medium of low-temperature switch valve 3 with strut buckling flip-over type selector valve 5, makes the spool of strut buckling flip-over type selector valve 5 bear the load produced from low-temperature switch valve 3 upstream pressure medium.This load will be passed to elongate rod 6, make elongate rod 6 bear one and the linear positively related thrust load of low-temperature switch valve 3 upstream pressure medium.
When the pressure coming low-temperature switch valve 3 upstream is lower than set point, the load that elongate rod 6 is born is less than ultimate load and keeps stable, and the end thrust of elongate rod 6 makes the spool of strut buckling flip-over type selector valve 5 be in working position one; When the pressure from pneumatic valve upstream is higher than set point, the load that elongate rod 6 is born will exceed ultimate load and unstability bends, now its effective length can significantly diminish moment, its thrust acted on the spool of unstability flip-over type selector valve 5 can reduce suddenly, spool under pressure medium can promote action to working position two.The working position of strut buckling flip-over type selector valve 5 spool determines runner and the direction of the instrument wind of turnover pneumatic actuator 1, and then decision is for driving the action of the pneumatic actuator 1 of the opening and closing of low-temperature switch valve 3.No matter spool is in working position one or working position two, medium from low-temperature switch valve 3 upstream in strut buckling flip-over type selector valve 5 all can not flow through strut buckling flip-over type selector valve 5, and the fluid namely in pressure inlet tube 4 and strut buckling flip-over type selector valve 5 is in immobilising state all the time.
Wherein, the length of pressure inlet tube 4 is not less than 250mm, with to ensure between strut buckling flip-over type selector valve 5 and cryogenic media and between form the isolation gas column of sufficient length, make temperature in strut buckling flip-over type selector valve 5 cavity by the impact of cryogenic media, only determined by ambient temperature.
Pneumatic actuator 1 is connected by instrument airduct line 9 with between gas holder with strut buckling flip-over type selector valve 5 and strut buckling flip-over type selector valve 5.Gas holder 7 ingress is provided with one-way valve 8, makes instrument wind can only flow into gas tank 7, can not reflux.Even if thus ensure that when supply fault appears in the instrument wind of factory system, still can store the instrument wind of certain pressure and volume in gas holder 7, these instrument wind can drive pneumatic actuator 1 to open or close low-temperature switch valve 3.
Under superpressure operating mode, as bleeder valve, the specific embodiment of the present invention is described by the Subzero valve of strut buckling trigger action below.
In normal conditions, the pressure of low-temperature switch valve 3 upstream is lower than set point, the load that elongate rod 6 is born is less than ultimate load and pressure bar stabilization, the end thrust of elongate rod 6 makes the spool of strut buckling flip-over type selector valve 5 be in working position one, now instrument is distinguished and admirable enters gas holder 7 through one-way valve 8, and enters pneumatic actuator 1 according to making low-temperature switch valve 3 keep the mode of closed condition to flow through strut buckling flip-over type selector valve 5.See Fig. 2.
Under damage, the pressure of low-temperature switch valve 3 upstream exceedes set point, the load that now elongate rod 6 is born will exceed ultimate load and strut buckling, now its effective length can significantly diminish moment, its thrust acted on the spool of strut buckling flip-over type selector valve 5 can reduce suddenly, spool under pressure medium can promote action to working position two, now the inner passage of strut buckling flip-over type selector valve 5 can change, instrument wind is made to enter pneumatic actuator 1 according to the mode required for Open valve, pneumatic actuator 1 will open low-temperature switch valve 3, thus achieve the automatic unlatching of superpressure operating mode lower valve.See Fig. 3.
Elongate rod 6 occur strut buckling and low-temperature switch valve 3 automatically open and pressure recover in pressure piping normal after, take out the elongate rod 3 of unstability, then pressure is applied to the spool of strut buckling flip-over type selector valve 5, make it restore to working position one, now instrument wind can enter pneumatic actuator 1 according to the mode required for throttle down thus close low-temperature switch valve 3, the valve position (complete shut-down position) under namely making low-temperature switch valve 3 return to its nominal situation.After low-temperature switch valve 3 resets, the elongate rod 6 more renewed, thus complete whole reseting procedure.
In addition, according to Euler column spring law, its ultimate load can be changed by adjustment its Young's modulus of elongate rod 6 and slenderness ratio, and then setting pressure during change valve auto-action.
All features disclosed in this specification, or the step in disclosed all methods or process, except the special type mutually repelled and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalence or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (3)
1. under a superpressure operating mode by the Subzero valve of strut buckling trigger action, critical piece comprises pneumatic actuator (1), support (2), low-temperature switch valve (3), pressure inlet tube (4), strut buckling flip-over type selector valve (5), elongate rod (6), gas holder (7), one-way valve (8) and instrument airduct line (9), it is characterized in that: trigger the distinguished and admirable road of instrument flowing through strut buckling flip-over type selector valve (5) and change with flowing to and then make the parts of valve event be elongate rod (6), triggered the action of low-temperature switch valve (3) by the strut buckling of elongate rod (6) under superpressure operating mode.
2. under superpressure operating mode according to claim 1 by the Subzero valve of strut buckling trigger action, wherein the cavity of the upstream medium of low-temperature switch valve (3) with strut buckling flip-over type selector valve (5) is connected by pressure inlet tube (4), make the spool of strut buckling flip-over type selector valve (5) bear the load produced from low-temperature switch valve (3) upstream pressure medium, and the length of pressure inlet tube (4) is not less than 250mm.
3. under superpressure operating mode according to claim 1 by the Subzero valve of strut buckling trigger action, wherein gas holder (7) ingress is provided with one-way valve (8), makes instrument wind can only flow into gas tank (7), can not reflux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510091251.XA CN105318088A (en) | 2015-02-28 | 2015-02-28 | Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510091251.XA CN105318088A (en) | 2015-02-28 | 2015-02-28 | Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105318088A true CN105318088A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510091251.XA Withdrawn CN105318088A (en) | 2015-02-28 | 2015-02-28 | Low-temperature valve triggered by compression bar destabilizing to act under overpressure working condition |
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| CN (1) | CN105318088A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202691185U (en) * | 2012-06-08 | 2013-01-23 | 刘海亮 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN204062041U (en) * | 2014-02-17 | 2014-12-31 | 刘海亮 | By the automatic valve of strut buckling trigger action under superpressure operating mode |
| CN204477452U (en) * | 2015-02-28 | 2015-07-15 | 刘海亮 | By the Subzero valve of strut buckling trigger action under superpressure operating mode |
-
2015
- 2015-02-28 CN CN201510091251.XA patent/CN105318088A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN202691185U (en) * | 2012-06-08 | 2013-01-23 | 刘海亮 | Pressure rod trigger type high-pressure and low-pressure emergency shut-off valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN204062041U (en) * | 2014-02-17 | 2014-12-31 | 刘海亮 | By the automatic valve of strut buckling trigger action under superpressure operating mode |
| CN204477452U (en) * | 2015-02-28 | 2015-07-15 | 刘海亮 | By the Subzero valve of strut buckling trigger action under superpressure operating mode |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160217 Address after: 211316, No. 12 Tan Avenue, Gaochun Economic Development Zone, Nanjing, Jiangsu Applicant after: JIANGSU RUILANGBO MECHANICAL EQUIPMENT CO., LTD. Address before: 100176 No. 2 North Yongchang Road, Beijing economic and Technological Development Zone, Beijing Applicant before: Liu Hailiang Applicant before: Zhang Zaixiao Applicant before: Wang Lei Applicant before: Zhao Shoujun |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160210 |