CN110005935A - A kind of LNG gas cylinder of interior decompression - Google Patents
A kind of LNG gas cylinder of interior decompression Download PDFInfo
- Publication number
- CN110005935A CN110005935A CN201910201232.6A CN201910201232A CN110005935A CN 110005935 A CN110005935 A CN 110005935A CN 201910201232 A CN201910201232 A CN 201910201232A CN 110005935 A CN110005935 A CN 110005935A
- Authority
- CN
- China
- Prior art keywords
- bead
- inner pressurd
- pressurd vessel
- decompression
- lng
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000006837 decompression Effects 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 49
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011324 bead Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000003345 natural gas Substances 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000003276 anti-hypertensive effect Effects 0.000 abstract description 4
- 239000003949 liquefied natural gas Substances 0.000 description 35
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses the LNG gas cylinders being depressured in one kind, sealing welding is depressured storehouse in the inner pressurd vessel of the gas cylinder, its volume is not less than the 1/10 of inner pressurd vessel volume, decompression the top of the warehouse welds the upper communicating pipe being connected to the inner pressurd vessel gas compartment, weld the lower communicating tube being connected to inner pressurd vessel natural gas liquids, mounting ball valve on lower communicating tube in bottom.The ball valve includes bead, baffle and the conical surface, the salable conical surface of bead, and baffle can limit bead and freely roll in local space, also guarantees lower flow of the natural gas liquids from bead.Decompression pressure decay rate is fast in the gas cylinder, and antihypertensive effect is obvious, and ball valve both ensure that effective decompression space in decompression storehouse, also ensures the long-time service of LNG gas cylinder.
Description
Technical field
The invention belongs to LNG to produce storage art, be related to a kind of LNG gas cylinder, the LNG gas on especially a kind of transport vehicle
Bottle.
Background technique
While now with nation-building conservation-minded society, strict demand environmental protection, the application field of natural gas gradually expands
Greatly.Power source concern by various circles of society of the liquefied natural gas LNG as transport vehicle, but during transportation because of LNG
It jolts and its gas pressure is caused to increase in short-term, when being more than its safe pressure, can be discharged from safety valve, to cause LNG fuel unrestrained
Take, so needing design safety dropping equipment in the structure of LNG gas cylinder.
LNG gas cylinder is set with by inner pressurd vessel and outer container, and attached drawing 1 is routine LNG gas cylinder safely schematic device, LNG
Design has decompression storehouse 4 in gas cylinder inner pressurd vessel 1, and the lower part design in decompression storehouse 4 has aperture.Nitrogen when injecting LNG, in decompression storehouse 4
Air volume can be compressed, pressure rise.When gas pressure of the sum of the gas pressure and fluid pressure being depressured in storehouse with inner pressurd vessel
When equal with the sum of fluid pressure, balance is kept.When inner pressurd vessel gas pressure increases in short-term, liquid natural gas LNG can be from childhood
Hole flows into decompression storehouse, to reduce inner pressurd vessel gas pressure, plays the role of reducing gas pressure.But dropping equipment decompression effect
Fruit is unobvious, and in the process of moving, natural gas discharges the case where being depressured from safety valve 2 to LNG fuel automobile frequent occurrence, causes
The waste of LNG.
Summary of the invention
It solves the above problems, the present invention provides the LNG gas cylinder being depressured in one kind, meets automobile inner pressurd vessel in the process of moving
Raised decompression is required without discharging natural gas gas pressure in short-term.
The technical scheme adopted by the invention is that: it is depressured sealing welding in the inner pressurd vessel of LNG gas cylinder inside and is depressured storehouse, is dropping
Pressure the top of the warehouse was welded the upper communicating pipe being connected to the inner pressurd vessel gas compartment, and bottom welding is connected to down with inner pressurd vessel natural gas liquids
Communicating pipe, mounting ball valve on lower communicating tube.The ball valve includes bead, baffle and the conical surface, the salable conical surface of bead, and baffle can limit
Bead processed freely rolls in local space, also guarantees lower flow of the natural gas liquids from bead.
Further, to enhance antihypertensive effect, the volume in the decompression storehouse is not less than the 1/10 of inner pressurd vessel volume.
Further, the bead uses stainless steel, and the inclination angle of diameter 2.5mm, the conical surface are not more than 20 °.
The beneficial effects of the present invention are: interior decompression pressure decay rate is fast, antihypertensive effect is obvious.Ball valve both ensure that decompression storehouse
Effectively decompression space, also ensures the long-time service of LNG gas cylinder.
Detailed description of the invention
Fig. 1 is original dropping equipment structural schematic diagram；
Fig. 2 is buck configuration schematic diagram of the present invention；
Fig. 3 is ball-valve structure schematic diagram；
Wherein: 1- inner pressurd vessel, 2- safety valve, 3- upper communicating pipe, 4- are depressured storehouse, 5- lower communicating tube, 6- ball valve, 7- natural gas liquid
Body, the 8- gas compartment, 9- bead, 10- baffle, the 11- conical surface.
Specific embodiment
Attached drawing 2 is the dropping equipment structural schematic diagram of decompression LNG gas cylinder in the present invention.It is equipped at the top of inner pressurd vessel 1
Pressure relief pipe with safety valve 2, the pipeline can be by the high pressure gas discharges of the gas compartment 8, to reduce the gas of the gas compartment 8
Body pressure guarantees the safe handling of gas cylinder.In one decompression storehouse 4 of middle part sealing welding of gas cylinder, volume is about not less than content
The top of the 1/10 of device volume, decompression storehouse 4 was welded a upper communicating pipe 3, and a lower communicating tube 5 is welded in bottom, upper communicating pipe 3 and
The gas compartment 8 in inner pressurd vessel is connected to, and a ball valve 6 is installed on lower communicating tube 5, is connected to natural gas liquids 7.The knot of ball valve 6
Structure is as shown in Fig. 3, including bead 9, baffle 10 and the conical surface 11, and the inclination angle of the conical surface 11 is a.The salable conical surface 11 of bead 9, gear
The effect one of plate 10 can limit bead 9 and freely roll in local space, and two may make LNG liquid in the lower flow of bead.
When filling full LNG liquid in LNG gas cylinder, retain the gas compartment 8 of certain volume, the gas space in interior container top
Between 8 by upper communicating pipe 3 with decompression storehouse 4 be connected to, at this time bead 9 by inner pressurd vessel fluid pressure keep close.Work as transport vehicle
It jolts, inner pressurd vessel liquid is changed into gas, and when gas pressure being caused to increase, the high pressure gas in the gas compartment 8 passes through upper connection
Pipe 3 enters decompression storehouse 4, to reduce the pressure of inner pressurd vessel gas.
There are gas-liquid two-phase conversion in inner pressurd vessel and decompression storehouse 4, it is depressured in storehouse 4 that there are a small amount of liquid natural gas LNG.
When the LNG in inner pressurd vessel is reduced because using, when liquid level is reduced to design height, the fluid pressure of LNG is lower than the sliding force of bead,
Bead is rolled down along the conical surface, and ball valve 6 is opened, and natural gas liquids 7 are connected to decompression storehouse 4, at this point, the LNG stream in decompression storehouse 4 returns content
In device.
It should be noted that the inclination angle a of the conical surface 11 is related with the liquid level of natural gas liquids 7, and natural gas liquids 7
Liquid level it is related with the volume of the gas compartment 8, in designed inclination angle a, the volume of the gas compartment 8 is not less than decompression storehouse 4
2 times of volume, thereby determine that the liquid level of natural gas liquids 7, can be according to 9 left side stress (along the conical surface) of bead and bead gravity
It is equal with the component along the conical surface that buoyancy difference generates to calculate inclination angle a.So inclination angle a is related with liquid height, also with it is small
Material specific gravity, the suffered buoyancy of ball are related.The present embodiment bead uses stainless steel, specific gravity 7930kg/m3, diameter 2.5mm,
Inclination angle a is not more than 20 °.
When LNG cylinder filling LNG, bead 9 is in the open state at this time, since cylinder filling is very fast, when filling of whole bottle
Between about 15min, under the action of baffle 10, during LNG in lower communicating tube 5 is flowed to decompression storehouse 4, LNG is from bead
Lower part flow through, faster liquid stream, which can boost bead, blocks the conical surface 11 rapidly, to close ball valve 6, so that decompression storehouse 4 is kept
Cavity.If can be depressured in storehouse 4 since gas-liquid two-phase converts, cause liquid to gradually increase, finally lose without ball valve 6
The volume that is effectively depressured and fail.
For the buck configuration that the present invention uses compared with the conventional buck device with attached drawing 1, upper communicating pipe 3 directly passes through gas
Flowing decompression, without by liquid decompression, pressure decay rate is fast, and antihypertensive effect is obvious.After the buck configuration, transport vehicle
In the process of moving without there is the phenomenon that LNG gas cylinder discharge.
The design of ball valve both ensure that effective decompression space in decompression storehouse, also ensure the long-time service of LNG gas cylinder.
Claims (3)
1. the LNG gas cylinder being depressured in a kind of, sealing welding decompression storehouse (4) in inner pressurd vessel, it is characterised in that: in the decompression storehouse
(4) the upper communicating pipe (3) that top welding is connected to the inner pressurd vessel gas compartment (8), bottom are welded and inner pressurd vessel natural gas liquids (7)
The lower communicating tube (5) of connection, mounting ball valve (6) on the lower communicating tube (5), the ball valve (6) includes bead (9), baffle
(10) and the conical surface (11), bead (9) the energy sealing cone (11), the baffle (10) can limit bead (9) in local space
It is interior freely to roll, guarantee lower flow of the natural gas liquids from bead.
2. a kind of interior LNG gas cylinder being depressured according to claim 1, it is characterised in that: the volume of decompression storehouse (4) is not
Less than the 1/10 of inner pressurd vessel volume.
3. a kind of interior LNG gas cylinder being depressured according to claim 1, it is characterised in that: the bead uses stainless steel, directly
Diameter 2.5mm, the conical surface (11) inclination angle are not more than 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910201232.6A CN110005935A (en) | 2019-03-18 | 2019-03-18 | A kind of LNG gas cylinder of interior decompression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910201232.6A CN110005935A (en) | 2019-03-18 | 2019-03-18 | A kind of LNG gas cylinder of interior decompression |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110005935A true CN110005935A (en) | 2019-07-12 |
Family
ID=67167220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910201232.6A Withdrawn CN110005935A (en) | 2019-03-18 | 2019-03-18 | A kind of LNG gas cylinder of interior decompression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005935A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5404918A (en) * | 1993-09-03 | 1995-04-11 | Minnesota Valley Engineering, Inc. | Cryogenic liquid storage tank |
| CN2630623Y (en) * | 2003-06-10 | 2004-08-04 | 河南中原绿能高科有限责任公司 | Liquefied natural gas storage tank with excessive filling prevention device |
| CN201110457Y (en) * | 2007-08-29 | 2008-09-03 | 北京天海工业有限公司 | Vehicle mounted liquefied natural gas container |
| CN101622491A (en) * | 2007-03-02 | 2010-01-06 | 西港能源有限公司 | Cryogen storage tank with the low temperature space that separates |
| CN103358892A (en) * | 2012-03-27 | 2013-10-23 | 北京天海工业有限公司 | Vehicle-mounted horizontal-type low-temperature heat-insulated natural-gas storage tank |
| CN203927395U (en) * | 2014-05-28 | 2014-11-05 | 武汉中正化工设备有限公司 | A kind of liquefied natural gas bottle topping up automatic limit device |
| CN205640222U (en) * | 2016-03-22 | 2016-10-12 | 新兴能源装备股份有限公司 | Liquefied natural gas storage tank pressure reduction means |
| CN210035040U (en) * | 2019-03-18 | 2020-02-07 | 新兴能源装备股份有限公司 | Gas cylinder pressure reduction device |
-
2019
- 2019-03-18 CN CN201910201232.6A patent/CN110005935A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5404918A (en) * | 1993-09-03 | 1995-04-11 | Minnesota Valley Engineering, Inc. | Cryogenic liquid storage tank |
| CN2630623Y (en) * | 2003-06-10 | 2004-08-04 | 河南中原绿能高科有限责任公司 | Liquefied natural gas storage tank with excessive filling prevention device |
| CN101622491A (en) * | 2007-03-02 | 2010-01-06 | 西港能源有限公司 | Cryogen storage tank with the low temperature space that separates |
| CN201110457Y (en) * | 2007-08-29 | 2008-09-03 | 北京天海工业有限公司 | Vehicle mounted liquefied natural gas container |
| CN103358892A (en) * | 2012-03-27 | 2013-10-23 | 北京天海工业有限公司 | Vehicle-mounted horizontal-type low-temperature heat-insulated natural-gas storage tank |
| CN203927395U (en) * | 2014-05-28 | 2014-11-05 | 武汉中正化工设备有限公司 | A kind of liquefied natural gas bottle topping up automatic limit device |
| CN205640222U (en) * | 2016-03-22 | 2016-10-12 | 新兴能源装备股份有限公司 | Liquefied natural gas storage tank pressure reduction means |
| CN210035040U (en) * | 2019-03-18 | 2020-02-07 | 新兴能源装备股份有限公司 | Gas cylinder pressure reduction device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190712 |
|
| WW01 | Invention patent application withdrawn after publication |