CN104847938A - Low temperature overflowing flow-limiting valve for liquefied natural gas bottles - Google Patents
Low temperature overflowing flow-limiting valve for liquefied natural gas bottles Download PDFInfo
- Publication number
- CN104847938A CN104847938A CN201510250137.7A CN201510250137A CN104847938A CN 104847938 A CN104847938 A CN 104847938A CN 201510250137 A CN201510250137 A CN 201510250137A CN 104847938 A CN104847938 A CN 104847938A
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- Prior art keywords
- spool
- hole
- liquid
- valve
- valve body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a low temperature overflowing flow-limiting valve for liquefied natural gas bottles. The low temperature overflowing flow-limiting valve comprises a valve body and a joint body, wherein the valve body is provided with a first inner cavity, and the joint body is provided with a second inner cavity. The liquid inlet end of the joint body is inserted into the first inner cavity, a valve body shroud is arranged on the side wall of the first inner cavity, a joint body shroud is arranged on the side wall of the second inner cavity, a valve plug is arranged in the valve body, the liquid outlet end of the valve plug is inserted into the second cavity, and the liquid inlet end of the valve plug butts against the valve body shroud. A liquid flowing space is reserved between the valve plug and the side wall of the first inner cavity. A first groove communicated with a liquid inlet of the joint body and a first radial through hole communicating the first groove and the liquid flowing space are formed in the liquid outlet end of the valve plug. A valve plug sealing surface capable of forming sealing with the liquid inlet end of the joint body is arranged on the valve plug. The valve plug is further provided with an overflowing hole capable of communicating the first groove and the second groove. A reset spring is arranged between the liquid outlet end of the valve plug and the shroud of the joint body. The low temperature overflowing flow-limiting valve for the liquefied natural gas bottles has the advantage of preventing liquefied natural gases in the liquefied natural gas bottles from leaking massively.
Description
Technical field
The present invention relates to the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle.
Background technique
In LNG Liquefied natural gas application, liquefied natural gas bottle is the capital equipment storing LNG Liquefied natural gas, LNG Liquefied natural gas is generally supplied automobile by the connecting tube be connected with its liquid outlet and uses by liquefied natural gas bottle, after connecting tube ruptures in the process of supplying gas, LNG Liquefied natural gas in liquefied natural gas bottle still continues to export LNG Liquefied natural gas in a large number by the caliber size of its liquid outlet, will volatilize away from point of rupture in large quantities after the LNG Liquefied natural gas exported is with the connecting tube of point of rupture, thus great waste is caused to LNG Liquefied natural gas, the LNG Liquefied natural gas needed badly at present when invention is a kind of can effectively prevent connecting tube from occurring to rupture in liquefied natural gas bottle leaks in a large number, staff is not hindered again clearly to find the device of connecting tube point of rupture particular location.
Summary of the invention
The object of this invention is to provide a kind of can effectively prevent connecting tube occur fracture time liquefied natural gas bottle in LNG Liquefied natural gas leak in a large number, do not hinder again staff clearly to find the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle of connecting tube point of rupture particular location.
For achieving the above object, present invention employs following technological scheme: the described low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, comprise valve body and fittings body, the first inner chamber being communicated with its liquid entering hole and liquid outlet is provided with in valve body, the second inner chamber being communicated with its liquid entering hole and liquid outlet is provided with in fittings body, the liquid feeding end of fittings body inserts the first inner chamber of valve body from the liquid outlet sealing of valve body and fixes with valve body, the sidewall of the first inner chamber of valve body is provided with valve body convex shoulder, the sidewall of the second inner chamber of fittings body is provided with fittings body convex shoulder, the spool between valve body convex shoulder and fittings body convex shoulder is movably set with in valve body, the outlet end of spool inserts the second inner chamber of fittings body from the liquid entering hole activity of fittings body, the end face of the liquid feeding end of spool can be against on valve body convex shoulder, liquid gap was left between the sidewall of spool and the first inner chamber, the first groove be connected with the liquid entering hole of valve body is provided with at the liquid feeding end of spool, and first radial direction through hole in some connection first grooves and mistake liquid gap, the second groove be connected with the liquid entering hole of fittings body is provided with at the outlet end of spool, and second radial direction through hole in some connection second grooves and mistake liquid gap, spool between the first radial direction through hole and the first radial direction through hole is provided with valve core sealed cover, valve core sealed cover can seal mutually with the liquid feeding end of fittings body and contact, and when valve core sealed cover and the liquid feeding end of fittings body mutually seal contact time, liquid gap of crossing between the first radial direction through hole and the second radial direction through hole is just cut off, the flowing hole that can be communicated with the first groove and the second groove is also provided with in spool, Returnning spring is provided with between the outlet end and fittings body convex shoulder of spool, one end of Returnning spring withstands on fittings body convex shoulder, the other end withstands on the outlet end of spool, spool has the trend be against by the end face of its liquid feeding end on valve body convex shoulder all the time under the inside elastic force effect of Returnning spring, when being secured on valve body convex shoulder under the inside elastic force effect at Returnning spring of the end face of the liquid feeding end of spool, the liquid entering hole of valve body, the first groove, the first radial direction through hole, cross liquid gap, the second radial direction through hole, the second groove, the second inner chamber and fittings body liquid outlet jointly form the first feed pathway, meanwhile, the liquid outlet of the liquid entering hole of valve body, the first groove, flowing hole, the second groove, the second inner chamber and fittings body forms the second feed pathway jointly, when spool by external force outwards pressed home spring until valve core sealed cover on spool and the liquid feeding end of fittings body seal mutually contact time, the first feed pathway is then cut off.
Further, the aforesaid low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, wherein: in flowing hole, be also provided with the steel wire reducing flowing hole aperture.
Further, the aforesaid low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, wherein: be evenly distributed with 6 the first radial direction through hole along spool circumference.
Further, the aforesaid low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, wherein: be evenly distributed with 6 the second radial direction through hole along spool circumference.
Further, the aforesaid low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, wherein: in the outlet end of spool, be provided with the receiving groove placing Returnning spring, one end of Returnning spring withstands on fittings body convex shoulder, the other end is placed in the receiving groove of the outlet end of spool.
By the enforcement of technique scheme, the LNG Liquefied natural gas that the present invention has when can effectively prevent connecting tube from occurring to rupture in liquefied natural gas bottle leaks in a large number, does not hinder again staff clearly to find the advantage of connecting tube point of rupture particular location.
Accompanying drawing explanation
Fig. 1 is the structural representation of the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle of the present invention.
Fig. 2 is the structural representation of the A-A section shown in Fig. 1.
Fig. 3 is the structural representation of the spool shown in Fig. 1.
Fig. 4 is the structural representation of the B-B section shown in Fig. 3.
Fig. 5 is the structural representation of the valve body shown in Fig. 1.
Fig. 6 is the structural representation of the fittings body shown in Fig. 1.
Fig. 7 is the working state schematic representation when spool shown in Fig. 1 cuts off the first feed pathway.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Fig. 7, the described low temperature overcurrent flow-limiting valve for liquefied natural gas bottle, comprise valve body 1 and fittings body 2, the first inner chamber 3 being communicated with its valve body liquid entering hole 11 and valve body liquid outlet 12 is provided with in valve body 1, the second inner chamber 4 being communicated with its fittings body liquid entering hole 21 and fittings body liquid outlet 22 is provided with in fittings body 2, the liquid feeding end of fittings body 2 seals the first inner chamber 3 of insertion valve body 1 from the valve body liquid outlet 12 of valve body 1 and fixes with valve body 1, the sidewall of the first inner chamber 3 of valve body 1 is provided with valve body convex shoulder 5, the sidewall of the second inner chamber 4 of fittings body 2 is provided with fittings body convex shoulder 6, the spool 7 between valve body convex shoulder 5 and fittings body convex shoulder 6 is movably set with in valve body 1, the outlet end of spool 7 inserts the second inner chamber 4 of fittings body 2 from fittings body liquid entering hole 21 activity of fittings body 2, the end face of the liquid feeding end of spool 7 can be against on valve body convex shoulder 5, liquid gap 8 was left between spool 7 and the sidewall of the first inner chamber 3, the first groove 9 be connected with the valve body liquid entering hole 11 of valve body 1 is provided with at the liquid feeding end of spool 7, and first radial direction through hole 10 in some connection first grooves 9 and mistake liquid gap 8, the second groove 13 be connected with the fittings body liquid entering hole 21 of fittings body 2 is provided with at the outlet end of spool 7, and second radial direction through hole 14 in some connection second grooves 13 and mistake liquid gap 8, spool 7 between the first radial direction through hole 10 and the first radial direction through hole 14 is provided with valve core sealed cover 15, valve core sealed cover 15 can seal mutually with the liquid feeding end of fittings body 2 and contact, and when valve core sealed cover 15 and the liquid feeding end of fittings body 2 mutually seal contact time, liquid gap 8 of crossing between the first radial direction through hole 10 and the second radial direction through hole 14 is just cut off, the flowing hole 16 that can be communicated with the first groove 9 and the second groove 13 is also provided with in spool 7, Returnning spring 17 is provided with between the outlet end and fittings body convex shoulder 6 of spool 7, one end of Returnning spring 17 withstands on fittings body convex shoulder 6, the other end withstands on the outlet end of spool 7, spool 7 has the trend be against by the end face of its liquid feeding end on valve body convex shoulder 5 all the time under the inside elastic force effect of Returnning spring 17, when being secured on valve body convex shoulder 5 under the inside elastic force effect at Returnning spring 17 of the end face of the liquid feeding end of spool 7, the fittings body liquid outlet 22 of valve body liquid entering hole 11, first groove 9, first radial direction through hole 10 of valve body 1, excessively liquid gap 8, second radial direction through hole 14, second groove 13, second inner chamber 4 and fittings body 2 forms the first feed pathway jointly, meanwhile, the fittings body liquid outlet 22 of valve body liquid entering hole 11, first groove 9 of valve body 1, flowing hole 16, second groove 13, second inner chamber 4 and fittings body 2 forms the second feed pathway jointly, when spool 7 by external force outwards pressed home spring 17 until valve core sealed cover 15 on spool 7 and the liquid feeding end of fittings body 2 seal mutually contact time, the first feed pathway is then cut off, in the present embodiment, in flowing hole 16, be also provided with the steel wire 18 reducing flowing hole 16 aperture, the pore size of flowing hole 16 can be adjusted like this by the diameter adjusting steel wire 18, greatly strengthen the Applicable scope of low temperature overcurrent flow-limiting valve, in the present embodiment, be evenly distributed with 6 the first radial direction through hole 10 along spool 7 circumference, LNG Liquefied natural gas can be made so more uniformly to flow into ebb interval 8, substantially increase operation stability, in the present embodiment, be evenly distributed with 6 the second radial direction through hole 14 along spool 7 circumference, LNG Liquefied natural gas can be made so more uniformly to flow out ebb interval 8, further increase operation stability, in the present embodiment, the receiving groove placing Returnning spring 17 is provided with in the outlet end of spool 7, one end of Returnning spring 17 withstands on fittings body convex shoulder 6, the other end is placed in the receiving groove of spool 7 outlet end, can improve the operation stability of Returnning spring 17 like this, when as installed, the liquid feeding end of valve body 1 is connected with the liquid outlet of liquefied natural gas bottle, and the outlet end of fittings body 2 is connected with the liquid feeding end of connecting tube,
Working principle of the present invention is as follows:
After the liquid outlet of liquefied natural gas bottle is connected with connecting tube by low temperature overcurrent cut-off valve, connecting tube be in normal working do not occur fracture time, pressure in liquefied natural gas bottle and the pressure in connecting tube reach balance, the end face of its liquid feeding end under the inside elastic force effect of Returnning spring 17 of the spool 7 in low temperature overcurrent flow-limiting valve is against on the valve body convex shoulder 5 of valve body 1 all the time, now, the valve body liquid entering hole 11 of valve body 1, first groove 9, first radial direction through hole 10, cross liquid gap 8, second radial direction through hole 14, second groove 13, the fittings body liquid outlet 22 of the second inner chamber 4 and fittings body 2 forms the first feed pathway jointly, simultaneously, the valve body liquid entering hole 11 of valve body 1, first groove 9, flowing hole 16, second groove 13, the fittings body liquid outlet 22 of the second inner chamber 4 and fittings body 2 forms the second feed pathway jointly, namely connecting tube be in normal work do not occur rupture state time, LNG Liquefied natural gas in liquefied natural gas bottle can be delivered to connecting tube from the first feed pathway and the second feed pathway simultaneously, because the aperture of flowing hole 16 is very little, therefore the LNG Liquefied natural gas flow of connecting tube is entered from the second feed pathway very little, thus LNG Liquefied natural gas flow connecting tube is entered much larger than the LNG Liquefied natural gas flow entering connecting tube from the second feed pathway from the first feed pathway,
After connecting tube ruptures, due to the pressure loss in connecting tube, now, outward pressure in liquefied natural gas bottle is by the inside elastic force much larger than Returnning spring 12, spool 5 can outwards will move under the outward pressure effect in liquefied natural gas bottle, contact until the valve core sealed cover 15 of spool 7 seals mutually with the liquid feeding end of fittings body 2, liquid gap 8 of crossing between the first radial direction through hole 10 and the second radial direction through hole 14 is cut off, thus cut off the first feed pathway accounting for main LNG Liquefied natural gas outflow passage, and then avoid the LNG Liquefied natural gas in liquefied natural gas bottle to continue a large amount of output, substantially reduce the outer discharge of LNG Liquefied natural gas in liquefied natural gas bottle, and the LNG Liquefied natural gas now in liquefied natural gas bottle also can continue to export from the second feed pathway to connecting tube LNG Liquefied natural gas, because the LNG Liquefied natural gas flow entering connecting tube from the second feed pathway is very little, these small flow liquefied natural gas flowing into connecting tube can distribute from the point of rupture of connecting tube, namely the point of rupture of connecting tube can emit white gas, now, staff just can find rapidly the point of rupture of connecting tube, the LNG Liquefied natural gas that the present invention has when can effectively prevent connecting tube from occurring to rupture in liquefied natural gas bottle leaks in a large number, does not hinder again staff clearly to find the advantage of connecting tube point of rupture particular location.
Claims (5)
1. for the low temperature overcurrent flow-limiting valve of liquefied natural gas bottle, comprise valve body and fittings body, it is characterized in that: in valve body, be provided with the first inner chamber being communicated with its liquid entering hole and liquid outlet, the second inner chamber being communicated with its liquid entering hole and liquid outlet is provided with in fittings body, the liquid feeding end of fittings body inserts the first inner chamber of valve body from the liquid outlet sealing of valve body and fixes with valve body, the sidewall of the first inner chamber of valve body is provided with valve body convex shoulder, the sidewall of the second inner chamber of fittings body is provided with fittings body convex shoulder, the spool between valve body convex shoulder and fittings body convex shoulder is movably set with in valve body, the outlet end of spool inserts the second inner chamber of fittings body from the liquid entering hole activity of fittings body, the end face of the liquid feeding end of spool can be against on valve body convex shoulder, liquid gap was left between the sidewall of spool and the first inner chamber, the first groove be connected with the liquid entering hole of valve body is provided with at the liquid feeding end of spool, and first radial direction through hole in some connection first grooves and mistake liquid gap, the second groove be connected with the liquid entering hole of fittings body is provided with at the outlet end of spool, and second radial direction through hole in some connection second grooves and mistake liquid gap, spool between the first radial direction through hole and the first radial direction through hole is provided with valve core sealed cover, valve core sealed cover can seal mutually with the liquid feeding end of fittings body and contact, and when valve core sealed cover and the liquid feeding end of fittings body mutually seal contact time, liquid gap of crossing between the first radial direction through hole and the second radial direction through hole is just cut off, the flowing hole that can be communicated with the first groove and the second groove is also provided with in spool, Returnning spring is provided with between the outlet end and fittings body convex shoulder of spool, one end of Returnning spring withstands on fittings body convex shoulder, the other end withstands on the outlet end of spool, spool has the trend be against by the end face of its liquid feeding end on valve body convex shoulder all the time under the inside elastic force effect of Returnning spring, when being secured on valve body convex shoulder under the inside elastic force effect at Returnning spring of the end face of the liquid feeding end of spool, the liquid entering hole of valve body, the first groove, the first radial direction through hole, cross liquid gap, the second radial direction through hole, the second groove, the second inner chamber and fittings body liquid outlet jointly form the first feed pathway, meanwhile, the liquid outlet of the liquid entering hole of valve body, the first groove, flowing hole, the second groove, the second inner chamber and fittings body forms the second feed pathway jointly, when spool by external force outwards pressed home spring until valve core sealed cover on spool and the liquid feeding end of fittings body seal mutually contact time, the first feed pathway is then cut off.
2. the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle according to claim 1, is characterized in that: the steel wire being also provided with to reduce flowing hole aperture in flowing hole.
3. the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle according to claim 1, is characterized in that: be evenly distributed with 6 the first radial direction through hole along spool circumference.
4. the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle according to claim 1, is characterized in that: be evenly distributed with 6 the second radial direction through hole along spool circumference.
5. the low temperature overcurrent flow-limiting valve for liquefied natural gas bottle according to claim 1, it is characterized in that: the receiving groove being provided with to place Returnning spring in the outlet end of spool, one end of Returnning spring withstands on fittings body convex shoulder, the other end is placed in the receiving groove of the outlet end of spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250137.7A CN104847938A (en) | 2015-05-18 | 2015-05-18 | Low temperature overflowing flow-limiting valve for liquefied natural gas bottles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250137.7A CN104847938A (en) | 2015-05-18 | 2015-05-18 | Low temperature overflowing flow-limiting valve for liquefied natural gas bottles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104847938A true CN104847938A (en) | 2015-08-19 |
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ID=53847803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510250137.7A Pending CN104847938A (en) | 2015-05-18 | 2015-05-18 | Low temperature overflowing flow-limiting valve for liquefied natural gas bottles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847938A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202206A (en) * | 2015-11-04 | 2015-12-30 | 江南工业集团有限公司 | Low-temperature cutting-off flow-limiting valve |
| CN105221771A (en) * | 2015-10-29 | 2016-01-06 | 江南工业集团有限公司 | A kind of low temperature cut-off flow-limiting valve |
| CN111255909A (en) * | 2020-01-17 | 2020-06-09 | 浙江大学 | Ultra-low temperature ball valve body cavity abnormity-preventing boosting device with self-closing function and method thereof |
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| WO2005098285A2 (en) * | 2004-04-06 | 2005-10-20 | M & C Products Analysentechnik Gmbh | Flow limitation valve for a gas offtake probe |
| CN201014000Y (en) * | 2007-02-08 | 2008-01-30 | 爱福瑞·凯德 | Automatically current limiting valve |
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| CN103322255A (en) * | 2013-06-24 | 2013-09-25 | 丹阳市飞轮气体阀门有限公司 | Automotive LNG (liquefied natural gas) liquid-phase flow limiting valve |
| CN203686288U (en) * | 2014-02-14 | 2014-07-02 | 成都朗瑞深冷科技有限公司 | Flow-limiting valve |
| CN204756057U (en) * | 2015-05-18 | 2015-11-11 | 苏州赛智达智能科技有限公司 | A low temperature overflows restriction valve for liquefied natural gas bottle |
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2015
- 2015-05-18 CN CN201510250137.7A patent/CN104847938A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098285A2 (en) * | 2004-04-06 | 2005-10-20 | M & C Products Analysentechnik Gmbh | Flow limitation valve for a gas offtake probe |
| CN201014000Y (en) * | 2007-02-08 | 2008-01-30 | 爱福瑞·凯德 | Automatically current limiting valve |
| CN102192348A (en) * | 2011-01-30 | 2011-09-21 | 张家港富瑞特种装备股份有限公司 | Flow control valve |
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| CN204756057U (en) * | 2015-05-18 | 2015-11-11 | 苏州赛智达智能科技有限公司 | A low temperature overflows restriction valve for liquefied natural gas bottle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221771A (en) * | 2015-10-29 | 2016-01-06 | 江南工业集团有限公司 | A kind of low temperature cut-off flow-limiting valve |
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| CN105202206B (en) * | 2015-11-04 | 2018-05-11 | 江南工业集团有限公司 | Low temperature ends flow-limiting valve |
| CN111255909A (en) * | 2020-01-17 | 2020-06-09 | 浙江大学 | Ultra-low temperature ball valve body cavity abnormity-preventing boosting device with self-closing function and method thereof |
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Application publication date: 20150819 |
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| RJ01 | Rejection of invention patent application after publication |