CN102620022B - LNG (Liquefied Natural Gas) online breaking valve - Google Patents
LNG (Liquefied Natural Gas) online breaking valve Download PDFInfo
- Publication number
- CN102620022B CN102620022B CN201210104499.1A CN201210104499A CN102620022B CN 102620022 B CN102620022 B CN 102620022B CN 201210104499 A CN201210104499 A CN 201210104499A CN 102620022 B CN102620022 B CN 102620022B
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- Prior art keywords
- breaking
- lng
- filling device
- hollow sleeve
- wind pipeline
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- 239000003949 liquefied natural gas Substances 0.000 title abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Pipe Accessories (AREA)
Abstract
The invention discloses an LNG (Liquefied Natural Gas) online breaking valve. The LNG online breaking valve comprises a breaking pipe connector for connecting a filling machine liquid outlet with a liquid filling gun, and a breaking device connected with a filling machine instrument air pipeline, wherein the breaking device comprises an adapter connected with the filling machine instrument air pipeline, a hollow sleeve connected and communicated with the adapter, a pulling rod which is mounted in the hollow sleeve and provided with an end part propped against the breaking pipe connector, and an O-shaped sealing ring mounted between the inner wall of the hollow sleeve and the outer wall of the pulling rod; and a pressure release hole for releasing the air pressure in the instrument air pipeline when the breaking pipe connector is broken is formed in the hollow sleeve. The LNG online breaking valve is simple in structure and low in cost, can instantly release pressure and cut off liquid flow when the breaking pipe connector is broken, avoids the defect caused by excessively small or excessively large breaking force of the breaking valve, and is safe and reliable.
Description
Technical field
The present invention relates to valve technology field, particularly relate to a kind of online Pull breaking ualve of LNG for cutting-off liquid flow in the time that LNG filling device pipeline is surprisingly broken.
Background technique
Along with the generally use of LNG Liquefied natural gas (LNG), China LNG automobile constantly increases progressively every year, and therefore the liquid measure of selling of LNG liquid filling station every day also significantly promotes.Conventionally, every LNG filling device at least needs continuous firing more than 20 hours every day, because LNG filling device is to carry out work under the state of ultralow temperature, therefore for whole liquid filling station, even the safety control of every filling device and use need to propose to be strict with and standard.
For fear of in liquid feeding process or after liquid feeding finishes; due to driver or employee's carelessness; in the time that liquid feeding rifle not yet takes off, starting automobile causes LNG liquid pipe to be pulled off; cause the leaked liquid of LNG filling device; even cause security incident, therefore between filling device liquid outlet and liquid feeding rifle, connected Pull breaking ualve, in the time there is above-mentioned situation; Pull breaking ualve is cutting-off liquid flow in time, plays the effect of safety protection.
But; because technology is perfect not at present; many Pull breaking ualves often there will be fault, and some is pulled off when external force is very little, and some still can not be pulled off in the time that external force is very large; also some can not cutting-off liquid flow after breaking; cause cryogenic liquid leakage, when serious, can cause casualty accident, therefore the design of Pull breaking ualve will guarantee the impact that is not subject to external power little; guarantee again in the time that external force is greater than certain value, can break in time and cutting-off liquid flow, require safe and reliable.
Summary of the invention
The object of the present invention is to provide the online Pull breaking ualve of a kind of LNG safe and reliable and simple in structure, that cost is low, while avoiding LNG filling device pipeline surprisingly to be broken, cause security incident.
Technological scheme of the present invention is as follows: the online Pull breaking ualve of a kind of LNG, comprises the breaking device of breaking pipe joint, being connected with filling device instrument wind pipeline that connects filling device liquid outlet and liquid feeding rifle.
If due to driver or employee's carelessness, in the time that not yet taking off, starts by liquid feeding rifle automobile, breaking pipe joint is subject to external force and is first pulled off, after breaking pipe joint and being pulled off, breaking device starts pressure release, due to breaking device by instrument wind pipeline with control the pneumatic valve parallel connection that filling device fluid oral fluid circulates disconnected and communicate, therefore after breaking device pressure release, pneumatic valve starts exhaust, pneumatic valve internal air pressure is reduced, when air pressure during lower than certain value pneumatic valve automatically close, cutting-off liquid flow.
Hollow sleeve that breaking device comprises the conversion adapter that is connected with filling device instrument wind pipeline, is connected with conversion adapter and communicates, be arranged in hollow sleeve and end withstands on the pull bar broken on pipe joint, is arranged on the O RunddichtringO between hollow sleeve inwall and pull bar outer wall, wherein, when hollow sleeve is provided with and breaks pipe joint and be pulled off for draining the relief hole of instrument wind pipeline internal air pressure.
Under normal circumstances, because withstanding on, tie rod end breaks on pipe joint, therefore the resistance that pull bar is subject to breaking pipe joint can not eject under the effect of air pressure, and the space of pull bar and hollow sleeve seals by O RunddichtringO, air pressure in instrument wind pipeline can not pass through relief hole releasing pressure automatically, air pressure in instrument wind pipeline makes pneumatic valve in opening state, and LNG liquid flows out by pneumatic valve; In the time breaking pipe joint and be subject to external force and be pulled off, tie rod end is unsettled, now pull bar ejects under the effect of instrument wind pipeline air pressure inside, after pull bar ejects, the relief hole of rear end is communicated with rapidly with instrument piping, air pressure in pipeline discharged rapidly in moment, and emergency pneumatic valve turn-offs rapidly in the situation that not having air pressure or air pressure very low, cutting-off liquid flow.
Pull-off force when breaking pipe joint and being pulled off is 400N～600N.Be less than 400N if break the pull-off force of pipe joint, easily cause and break pipe joint because other factors are pulled off, cause the waste of breaking pipe joint; Be greater than 600N if break the pull-off force of pipe joint, easily cause the liquid pipe of LNG filling device to be pulled off, Pull breaking ualve can not flow by normal cutoff liquid, causes LNG leak of liquid.
The present invention is simple in structure, cost is low, can moment pressure release cutting-off liquid flow after breaking pipe joint and being pulled off, avoid the too small or excessive defect causing of the pull-off force of Pull breaking ualve, and safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the online Pull breaking ualve of LNG;
Fig. 2 is the use principle figure of the online Pull breaking ualve of LNG.
Embodiment
Below in conjunction with concrete drawings and embodiments, the present invention is further illustrated.
Referring to Fig. 1 and Fig. 2, the online Pull breaking ualve of a kind of LNG, comprises the breaking device 20 of breaking pipe joint 10, being connected with filling device instrument wind pipeline 80 that connects filling device liquid outlet 60 and liquid feeding rifle 70.If due to driver or employee's carelessness, in the time that not yet taking off, starts by liquid feeding rifle 70 automobile, breaking pipe joint 10 is subject to external force and is first pulled off, after breaking pipe joint 10 and being pulled off, breaking device 20 starts pressure release, because breaking device 20 is by instrument wind pipeline 80 and control disconnected pneumatic valve 50 parallel connections of circulating of filling device liquid outlet 60 liquid and communicate, therefore after breaking device 20 pressure releases, pneumatic valve 50 starts exhaust, pneumatic valve 50 internal air pressures are reduced, when air pressure during lower than certain value pneumatic valve 50 automatically close, cutting-off liquid flow.
In the present embodiment, hollow sleeve 23 that breaking device 20 comprises the conversion adapter 21 that is connected with filling device instrument wind pipeline 80, is connected with conversion adapter 21 and communicates, be arranged in hollow sleeve 23 and end withstands on the pull bar 26 broken on pipe joint 10, is arranged on the O RunddichtringO 24 between hollow sleeve 23 inwalls and pull bar 26 outer walls, wherein, when hollow sleeve 23 is provided with and breaks pipe joint 10 and be pulled off for draining the relief hole 25 of instrument wind pipeline 80 internal air pressures.
Gas in instrument wind pipeline 80 is discharged by relief hole 25 by hollow sleeve 23 and the space of pull bar 26, therefore between hollow sleeve 23 and pull bar 26, O RunddichtringO 24 is installed.Under normal circumstances, because withstanding on, pull bar 26 ends break on pipe joint 10, therefore the resistance that pull bar 26 is subject to breaking pipe joint 10 can not eject under the effect of air pressure, and pull bar 26 seals by O RunddichtringO 24 with the space of hollow sleeve 23, air pressure in instrument wind pipeline 80 can not pass through relief hole 25 releasing pressure automaticallies, air pressure in instrument wind pipeline 80 makes pneumatic valve 50 in opening state, and LNG liquid flows out by pneumatic valve 50, in the time breaking pipe joint 10 and be subject to external force and be pulled off, pull bar 26 ends are unsettled, now pull bar 26 ejects under the effect of instrument wind pipeline 80 air pressure inside, after pull bar 26 ejects, air pressure in instrument wind pipeline 80 is by relief hole 25 pressure releases, because Pull breaking ualve communicates with pneumatic valve 50 parallel connections, therefore after Pull breaking ualve pressure release, the air pressure in pneumatic valve 50 reduces, when air pressure during lower than certain value pneumatic valve 50 automatically close, cutting-off liquid flow, avoid the carelessness because of driver or staff, cause the liquid pipe of LNG filling device to be pulled off the LNG leak of liquid of rear generation, increase the Security of LNG filling device.
Gas in instrument wind pipeline 80 is discharged by conversion adapter 21 and the gap of hollow sleeve 23, increase the tightness of Pull breaking ualve, therefore between conversion adapter 21 and hollow sleeve 23, be provided with elastic washer 22, when installation, between conversion adapter 21 and hollow sleeve 23, tighten by screw thread, elastic washer 22 in the time that screw thread is tightened compression seal between conversion adapter 21 and hollow sleeve 23.
A kind of filling device with the online Pull breaking ualve of LNG, the cooling driers 40, the instrument wind pipeline 80 being connected with cooling driers 40 that comprise air compressor 30, be connected with air compressor 30, be connected the online Pull breaking ualve of liquid feeding rifle 70, LNG that circulates disconnected pneumatic valve 50, is connected with filling device liquid outlet 60 for controlling filling device liquid outlet 60 liquid with instrument wind pipeline 80, wherein, the pipe joint 10 of breaking of the online Pull breaking ualve of LNG is connected between filling device liquid outlet 60 and liquid feeding rifle 70, and breaking device 20 communicates with pneumatic valve 50 parallel connections by instrument wind pipeline 80.
In the present embodiment, break pipe joint 10 and be connected with liquid feeding rifle 70 with filling device liquid outlet 60 by breaking nut, be convenient to dismounting; Breaking device 20 communicates with pneumatic valve 50 parallel connections by instrument wind pipeline 80, that is to say, the outlet of instrument wind pipeline 80 connects pneumatic valve 50, also connect the conversion adapter 21 of breaking device 20, after breaking pipe joint 10 and being pulled off, pull bar 26 ejects simultaneously, gas in instrument wind pipeline 80 is discharged by relief hole 25, air pressure in instrument wind pipeline 80 is reduced, and pneumatic valve 50 cuts out automatically simultaneously, cutting-off liquid flow.
When LNG filling device is normally worked, the pressurized gas that air compressor 30 produces is removed the moisture in pressurized air by cooling driers 40, then pressurized air flow to pneumatic valve 50 by instrument wind pipeline 80, make pneumatic valve 50 in opening state, LNG liquid successively flows out by pneumatic valve 50, liquid outlet 60, liquid feeding rifle 70; Breaking after unexpected being broken of pipe joint 10 quilts, the pull bar of breaking device 20 ejects, and the gas in instrument wind pipeline 80 is discharged by relief hole 25, and the air pressure in instrument wind pipeline 80 is reduced, and pneumatic valve 50 cuts out automatically simultaneously, cutting-off liquid flow.
The instrument wind pipeline 80 being connected with breaking device 20 is provided with stop valve 90, and user can determine whether enable the online Pull breaking ualve of LNG as required.If user need to enable Pull breaking ualve, open stop valve 90, the gas in instrument wind pipeline 80 acts on pull bar 26 by conversion adapter 21, pull bar is withstood under the promotion of air pressure and break on pipe joint 10; Otherwise close block valve 90.
The working procedure of above-mentioned filling device is as follows: first install and break pipe joint 10 and breaking device 20, after installing, open stop valve 90, then start filling device, air compressor 30 and cooling driers 40 are started working, pneumatic valve 50 is opened under the effect of air pressure, and LNG liquid flows out through pneumatic valve 50, liquid outlet 60 and liquid feeding rifle 70.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the online Pull breaking ualve of LNG, it is characterized in that: comprise the pipe joint of breaking that connects filling device liquid outlet and liquid feeding rifle, the breaking device being connected with filling device instrument wind pipeline, described breaking device comprises the conversion adapter being connected with filling device instrument wind pipeline, the hollow sleeve that is connected and communicates with conversion adapter, be arranged in hollow sleeve and end withstands on the pull bar of breaking on pipe joint, be arranged on the O RunddichtringO between hollow sleeve inwall and pull bar outer wall, wherein, when hollow sleeve is provided with and breaks pipe joint and be pulled off for draining the relief hole of instrument wind pipeline internal air pressure.
2. the online Pull breaking ualve of LNG according to claim 1, is characterized in that: described in pull-off force when breaking pipe joint and being pulled off be 400N～600N.
3. one kind has the filling device of the online Pull breaking ualve of LNG as claimed in claim 1, the cooling driers that comprises air compressor, be connected with air compressor, the instrument wind pipeline being connected with cooling driers, be connected the liquid feeding rifle that circulates disconnected pneumatic valve, is connected with filling device liquid outlet for controlling filling device fluid oral fluid with instrument wind pipeline, it is characterized in that: also comprise the online Pull breaking ualve of LNG, wherein, the pipe joint of breaking of the online Pull breaking ualve of LNG is connected between filling device liquid outlet and liquid feeding rifle, and breaking device communicates with pneumatic valve parallel connection by instrument wind pipeline.
4. filling device according to claim 3, is characterized in that: the described instrument wind pipeline being connected with breaking device is provided with stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210104499.1A CN102620022B (en) | 2012-04-11 | 2012-04-11 | LNG (Liquefied Natural Gas) online breaking valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210104499.1A CN102620022B (en) | 2012-04-11 | 2012-04-11 | LNG (Liquefied Natural Gas) online breaking valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102620022A CN102620022A (en) | 2012-08-01 |
| CN102620022B true CN102620022B (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210104499.1A Active CN102620022B (en) | 2012-04-11 | 2012-04-11 | LNG (Liquefied Natural Gas) online breaking valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN102620022B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107387823B (en) * | 2017-08-17 | 2019-04-05 | 北京航天发射技术研究所 | The automatic anti-icing equipment of cryogenic loading system vacuum chuck isolation type and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425275A (en) * | 1973-03-19 | 1976-02-18 | Ici America Inc | Hermetic seal arrangement for sleeve valve |
| DE4221492A1 (en) * | 1991-07-16 | 1993-01-21 | Fafnir Gmbh | Hose safety device for fuel tank replenishment vehicle - has reed contacts in connection pieces between hose ends and couplings on both vehicle and tank |
| CN201217631Y (en) * | 2008-04-11 | 2009-04-08 | 北京航天发射技术研究所 | Pull-off protection device for liquefied natural gas dispenser |
| CN201416680Y (en) * | 2009-04-22 | 2010-03-03 | 上海顶瑞五金制品有限公司 | Pull-off valve |
| CN202048254U (en) * | 2011-04-11 | 2011-11-23 | 成都华气厚普燃气成套设备有限公司 | Breakaway valve |
| CN202349318U (en) * | 2011-12-20 | 2012-07-25 | 成都华气厚普机电设备股份有限公司 | Breakaway coupling valve |
-
2012
- 2012-04-11 CN CN201210104499.1A patent/CN102620022B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425275A (en) * | 1973-03-19 | 1976-02-18 | Ici America Inc | Hermetic seal arrangement for sleeve valve |
| DE4221492A1 (en) * | 1991-07-16 | 1993-01-21 | Fafnir Gmbh | Hose safety device for fuel tank replenishment vehicle - has reed contacts in connection pieces between hose ends and couplings on both vehicle and tank |
| CN201217631Y (en) * | 2008-04-11 | 2009-04-08 | 北京航天发射技术研究所 | Pull-off protection device for liquefied natural gas dispenser |
| CN201416680Y (en) * | 2009-04-22 | 2010-03-03 | 上海顶瑞五金制品有限公司 | Pull-off valve |
| CN202048254U (en) * | 2011-04-11 | 2011-11-23 | 成都华气厚普燃气成套设备有限公司 | Breakaway valve |
| CN202349318U (en) * | 2011-12-20 | 2012-07-25 | 成都华气厚普机电设备股份有限公司 | Breakaway coupling valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102620022A (en) | 2012-08-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 401329 Chongqing Jiulongpo Baishiyi town Hailong Village 8 Applicant after: Chongqing Juchuang Metering Equipment Co.,Ltd. Address before: 401120, No. 9, Yubei District Airport Industrial Park, Chongqing Applicant before: Chongqing Juchuang Metering Equipment Co.,Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |