CN103470826A - Maintainable low-temperature gas return port - Google Patents
Maintainable low-temperature gas return port Download PDFInfo
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- CN103470826A CN103470826A CN2013104562431A CN201310456243A CN103470826A CN 103470826 A CN103470826 A CN 103470826A CN 2013104562431 A CN2013104562431 A CN 2013104562431A CN 201310456243 A CN201310456243 A CN 201310456243A CN 103470826 A CN103470826 A CN 103470826A
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- valve rod
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- spring
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Abstract
The invention relates to a maintainable low-temperature gas return port, and belongs to the technical field of application of liquefied natural gas. The maintainable low-temperature gas return port is mainly characterized by comprising a valve top, a sealing element, a stop screw, a valve rod, a guide ring, a spring, a valve body, a lock nut, a baffle ring and a joint, wherein the valve top and the valve rod are connected through screw threads instead of a conventional interference fit mode for pressing the sealing element, and the stop screw is used for preventing the valve top from being loosened in the moving process; when the sealing element is worn gradually and loses the sealing effect, the sealing element can be replaced for maintenance after the valve top is detached quickly. The maintainable low-temperature gas return port has the characteristics of simple structure, reasonable design, convenient maintenance, fewer parts, low manufacturing cost, and the like.
Description
Technical field
The present invention relates to a kind of low temperature gas returning port of safeguarding, belong to the LNG Liquefied natural gas applied technical field, it is specially adapted to horizontal liquefied natural gas bottle and the air supply system for automobile of repeated charging.
Background technique
Along with the extensive use of LNG Liquefied natural gas (LNG) in new energy field, for storing and the gas cylinder of conveying liquified natural gas (LNG) also more and more comes into one's own, and on liquefied natural gas bottle, the connected element such as valve receives much attention as the core security component of gas cylinder.In background technique, the low temperature gas returning port of the liquefied natural gas bottle of domestic current use is all generally by the interference fit between spool and push rod, Sealing to be compressed to guarantee the sealingly secure of liquefied natural gas bottle, but by long-term actual practical proof, due to this gas returning port through constantly start or stop repeatedly, Sealing will produce wearing and tearing and progressively lose seal action, due to spool and push rod, by interference fit, Sealing is compressed simultaneously, once sealing part abrasion, to can not keep in repair fully, whole gas returning port will be scrapped, and cause user cost high.In order to overcome above deficiency, we are studied design to safeguarding the low temperature gas returning port.
Summary of the invention
Technical problem to be solved by this invention is that a kind of low temperature gas returning port of safeguarding will be provided, valve top and valve rod that it comprises adopt the form that is threaded to substitute traditional interference fit form press seal part, and it is loosening to prevent that with lock screw valve from withstanding in movement process.When Sealing progressively is worn and while losing seal action, can fast pulls down the valve top, change Sealing and safeguarded.
The technological scheme that the present invention solves its technical problem employing is: it comprises valve top, Sealing, lock screw, valve rod, guide ring, spring, valve body, locking nut, back-up ring, joint,
The inside of valve rod is the through hole cavity structure, is designed with three step surfaces on an inner chamber ancient piece of jade, round, flat and with a hole in its centre, is designed with two radially annular grooves on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod, is designed with 4 inclined holes that are mutually 90 ° on the inner chamber ancient piece of jade, round, flat and with a hole in its centre of valve rod front end,
Sealing is loaded on the outer bead of valve rod front end,
Valve top external thread rotary is loaded on threaded joint the press seal part of valve rod front end,
Lock screw is loaded on the side opening of valve rod front end, valve jacking row side direction fixed,
Two guide rings are loaded on respectively in two annular grooves on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod,
Valve top, Sealing, lock screw, valve rod, guide ring are assembled into an integral body, from the rear end of valve body is packed valve body into,
Spring is loaded in the inner chamber of valve rod, and the front end of spring leans the step surface in stem cavity,
The locking nut spinning is in valve body, and the rear portion of spring is by being loaded on the front end bead of locking nut, the precompression that the adjusting lock nut is certain to spring,
Back-up ring is fixed locking nut by the rear portion that is loaded on locking nut,
The joint outside thread is connected in the rear portion of valve body.
When liquefied natural gas bottle is not filled or during air feed, gas returning port is not worked, the spring in gas returning port relies on the loaded spring of self to try hard to recommend the pressure valve bar, makes Sealing be close to valve body front end bead, and gas returning port is in normally off.
When liquefied natural gas bottle is filled or during air feed, filling machine return-air rifle is connected with gas returning port, the return-air rifle withstands the valve top of gas returning port, the active force that overcomes spring is pressed into valve body by the valve top, the Sealing of gas returning port separates with valve body, gas returning port is opened, and the residual air in natural gas cylinder flows into the filling machine gas-returning devices through the gap between Sealing and valve body again via 4 inclined holes on valve rod.
After taking off filling machine return-air rifle, under the spring-force driven dual of spring, the valve rod band dynamic seal of gas returning port moves, and Sealing is close to valve body, and gas returning port is closed.
The beneficial effect that the present invention compared with the existing technology produced:
1, adopt due between valve top and valve rod the mode of structure be threaded, after sealing part abrasion, only need unclamp lock screw, pull down valve top, but just convenient replacing Sealing does not need to scrap whole gas returning port, improve its working life, can effectively reduce user cost.
2, simple in structure, reasonable in design, easy to maintenance, number of spare parts is few, low cost of manufacture.
The accompanying drawing explanation
Fig. 1 is that the present invention can safeguard the structural representation when low temperature gas returning port is closed.
Fig. 2 is the structural representation that can safeguard when the low temperature gas returning port is opened.
The structural drawing that Fig. 3 is valve rod 4 in Fig. 1.
The A-A view that Fig. 4 is valve rod 4 in Fig. 3.
Embodiment
Below in conjunction with accompanying drawing, most preferred embodiment of the present invention is further described.
A kind of low temperature gas returning port of safeguarding, it comprises valve top 1, Sealing 2, lock screw 3, valve rod 4, guide ring 5, spring 6, valve body 7, locking nut 8, back-up ring 9, joint 10.
Referring to Fig. 1, the inside of valve rod 4 is the through hole cavity structure, is designed with three step surfaces on an inner chamber ancient piece of jade, round, flat and with a hole in its centre, is designed with two radially annular grooves 12 on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod 4, is designed with 4 inclined holes 11 that are mutually 90 ° on the inner chamber ancient piece of jade, round, flat and with a hole in its centre of valve rod 4 front ends.
Valve pushes up threaded joint the press seal part 2 that 1 external thread rotary is loaded on valve rod 4 front ends.
Two guide rings 5 are loaded on respectively in two annular grooves 12 on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod 4.
Back-up ring 9 is fixed locking nut 8 by the rear portion that is loaded on locking nut 8.
Joint 10 outside threads are connected in the rear portion of valve body 7.
When liquefied natural gas bottle is not filled or during air feed, gas returning port is not worked, the spring 6 in gas returning port relies on the loaded spring of self to try hard to recommend pressure valve bar 4, makes Sealing 2 be close to valve body 7 front end beads, and gas returning port is in normally off.
When liquefied natural gas bottle is filled or during air feed, filling machine return-air rifle is connected with gas returning port, the return-air rifle withstands the valve top 1 of gas returning port, the active force that overcomes spring 6 is pressed into valve body 7 by valve top 1, the Sealing 2 of gas returning port separates with valve body 7, gas returning port is opened, and the residual air in natural gas cylinder flows into the filling machine gas-returning devices through the gap between Sealing 2 and valve body 7 again via 4 inclined holes 11 on valve rod 4.
After taking off filling machine return-air rifle, under the spring-force driven dual of spring 6, the valve rod 4 band dynamic seals 2 of gas returning port move, and Sealing 2 is close to valve body 7, and gas returning port is closed.Open and close repeatedly due to gas returning port, friction repeatedly between easily damaged parts Sealing 2 and valve body 7 certainly will affect the sealability of Sealing 2, as the sealability decline of Sealing 2, only need pull down gas returning port, change Sealing 2, the working life that can greatly improve like this gas returning port.
Claims (3)
1. can safeguard the low temperature gas returning port for one kind, it is characterized in that it comprises valve top (1), Sealing (2), lock screw (3), valve rod (4), guide ring (5), spring (6), valve body (7), locking nut (8), back-up ring (9), joint (10);
Be designed with two radially annular grooves (12) on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod (4);
Sealing (2) is loaded on the outer bead of valve rod (4) front end;
Valve top (1) external thread rotary is loaded on threaded joint the press seal part (2) of valve rod (4) front end;
Lock screw (3) is loaded on the side opening of valve rod (4) front end, side direction is carried out in valve top (1) and fix;
Two guide rings (5) are loaded on respectively in two annular grooves (12) on the outer ancient piece of jade, round, flat and with a hole in its centre of valve rod (4);
Valve top (1), Sealing (2), lock screw (3), valve rod (4), guide ring (5) are assembled into an integral body, from the rear end of valve body (7) is packed valve body (7) into;
Spring (6) is loaded in the inner chamber of valve rod (4), and the front end of spring (6) leans the step surface in valve rod (4) inner chamber;
Locking nut (8) spinning is in valve body (7), and the rear portion of spring (6) is by being loaded on the front end bead of locking nut (8), and adjusting lock nut (8) gives the certain precompression of spring (6);
Back-up ring (9) is fixed locking nut (8) by the rear portion that is loaded on locking nut (8);
Joint (10) outside thread is connected in the rear portion of valve body (7).
2. the low temperature gas returning port of safeguarding according to claim 1, it is characterized in that: the inside of described valve rod (4) is the through hole cavity structure, is designed with three step surfaces on the inner chamber ancient piece of jade, round, flat and with a hole in its centre of valve rod (4).
3. the low temperature gas returning port of safeguarding according to claim 1, is characterized in that: be designed with 4 inclined holes (11) that are mutually 90 ° on the inner chamber ancient piece of jade, round, flat and with a hole in its centre of described valve rod (4) front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104562431A CN103470826A (en) | 2013-09-30 | 2013-09-30 | Maintainable low-temperature gas return port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104562431A CN103470826A (en) | 2013-09-30 | 2013-09-30 | Maintainable low-temperature gas return port |
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| Publication Number | Publication Date |
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| CN103470826A true CN103470826A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013104562431A Pending CN103470826A (en) | 2013-09-30 | 2013-09-30 | Maintainable low-temperature gas return port |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759068A (en) * | 2014-01-24 | 2014-04-30 | 丹阳市飞轮气体阀门有限公司 | Gas saving base of safety valve of low temperature heat insulation gas cylinder |
| CN103775693A (en) * | 2014-02-14 | 2014-05-07 | 中国北方车辆研究所 | Valve core structure for tire valves of central tire inflation systems |
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN110220114A (en) * | 2019-06-27 | 2019-09-10 | 金基精密科技（深圳）有限公司 | A kind of non-dismountable self-closing valve of liquefied gas bottle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5299598A (en) * | 1992-07-02 | 1994-04-05 | Cross Pump International | Check valve |
| CN200999959Y (en) * | 2007-01-19 | 2008-01-02 | 成都川空阀门有限公司 | LNG filling device |
| CN201288860Y (en) * | 2008-10-20 | 2009-08-12 | 杭州水处理技术研究开发中心有限公司 | Water hydraulic inverted valve |
| WO2010037073A2 (en) * | 2008-09-29 | 2010-04-01 | Global Engineering Marketing Llc | Central tire inflation wheel assembly and valve |
| CN101737620A (en) * | 2010-01-08 | 2010-06-16 | 张家港富瑞特种装备股份有限公司 | Charging joint |
| CN201606656U (en) * | 2010-01-14 | 2010-10-13 | 张家港富瑞特种装备股份有限公司 | Gas returning port |
| CN102606779A (en) * | 2011-01-24 | 2012-07-25 | 上海靓消消防装备有限公司 | Piston type container valve with high flow |
| CN203743531U (en) * | 2013-09-30 | 2014-07-30 | 江南工业集团有限公司 | Maintainable low-temperature air return opening |
-
2013
- 2013-09-30 CN CN2013104562431A patent/CN103470826A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299598A (en) * | 1992-07-02 | 1994-04-05 | Cross Pump International | Check valve |
| CN200999959Y (en) * | 2007-01-19 | 2008-01-02 | 成都川空阀门有限公司 | LNG filling device |
| WO2010037073A2 (en) * | 2008-09-29 | 2010-04-01 | Global Engineering Marketing Llc | Central tire inflation wheel assembly and valve |
| CN201288860Y (en) * | 2008-10-20 | 2009-08-12 | 杭州水处理技术研究开发中心有限公司 | Water hydraulic inverted valve |
| CN101737620A (en) * | 2010-01-08 | 2010-06-16 | 张家港富瑞特种装备股份有限公司 | Charging joint |
| CN201606656U (en) * | 2010-01-14 | 2010-10-13 | 张家港富瑞特种装备股份有限公司 | Gas returning port |
| CN102606779A (en) * | 2011-01-24 | 2012-07-25 | 上海靓消消防装备有限公司 | Piston type container valve with high flow |
| CN203743531U (en) * | 2013-09-30 | 2014-07-30 | 江南工业集团有限公司 | Maintainable low-temperature air return opening |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759068A (en) * | 2014-01-24 | 2014-04-30 | 丹阳市飞轮气体阀门有限公司 | Gas saving base of safety valve of low temperature heat insulation gas cylinder |
| CN103775693A (en) * | 2014-02-14 | 2014-05-07 | 中国北方车辆研究所 | Valve core structure for tire valves of central tire inflation systems |
| CN103775693B (en) * | 2014-02-14 | 2016-04-06 | 中国北方车辆研究所 | A kind of valve core structure of Center Tyre Inflation/Deflation System tire valve |
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN104847937B (en) * | 2015-05-18 | 2017-05-03 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN110220114A (en) * | 2019-06-27 | 2019-09-10 | 金基精密科技（深圳）有限公司 | A kind of non-dismountable self-closing valve of liquefied gas bottle |
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Application publication date: 20131225 |