CN103971491A - Gas leakage alarming system for LNG (Liquefied Natural Gas) heavy truck - Google Patents
Gas leakage alarming system for LNG (Liquefied Natural Gas) heavy truck Download PDFInfo
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- CN103971491A CN103971491A CN201410227782.2A CN201410227782A CN103971491A CN 103971491 A CN103971491 A CN 103971491A CN 201410227782 A CN201410227782 A CN 201410227782A CN 103971491 A CN103971491 A CN 103971491A
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- gas
- fuel gas
- kuppe
- lng
- fixed cover
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Abstract
The invention provides a gas leakage alarming system for an LNG (Liquefied Natural Gas) heavy truck. The system comprises a frame assembly which is internally provided with a gas bottle and a valve and a pipeline attached to the gas bottle, a gas leakage sensor, an alarm, a fixed cover and a guide cover, wherein one end of the guide cover is a large opening while the other end is a small opening, the gas leakage sensor is installed in the fixed cover and is electrically connected with the alarm, the small opening of the guide cover is communicated with the fixed cover, and the large opening of the guide cover covers at least part of a joint between the valve and the pipeline but does not seal the frame assembly. The system provided by the invention has accuracy and safety of gas leakage detection of the heavy truck into consideration.
Description
Technical field
The present invention relates to automotive field, be specifically related to the fuel gas leak alarm systems that LNG heavily blocks.
Background technology
In recent years, liquefied natural gas (LNG) (LNG), compressed natural gas etc. are used widely as clean energy resource in industry and commerce, town dweller user and automobile industry.Fuel gas leak alarm systems is the important system that ensures production and personal safety, the place of distributing inflammable gas, combustible vapor such as be widely used at present between refinery, oil depot, liquefied gas station, gas station, refuelling station, paint spray booth, family manufacture, to detect in time the content of inflammable gas, find as early as possible to leak, eliminate danger.The principle of fuel gas leak alarm systems is to set after alarming value when combustible gas concentration reaches, flammable gas alarm sends alerting signal, take safety measures early to remind, prevent blast, fire failure, play in advance effect of prevention, and by accident control in the situation that contingency occurrence probability is minimum.But in automobile industry, along with 12.6.15 clause in GB7258-2012 claims: gas vehicle should be installed leakage warning device, all pipe joints place phenomenon that all should not leak air, LNG heavily blocks just specification gradually of gas leakage alarming device is installed.
In general, existing fuel gas leak alarm systems is made up of sensor (probe), alarm, mainly comprises several parts such as detecting element, amplifying circuit, warning system, display.In the time there is combustible gas leakage in tested place, sensor (probe) produces reaction, change into voltage signal or current signal is sent to alarm by sending down abnormally ascending signal, alarm demonstrates the percent concentration value of flammable gas explosion lower limit, and alerting signal is provided.
The installation site of gas leakage sensor is generally according to on-the-spot leak pressure, the leakage rate that the unit interval is possible, and the situations such as the passage of Air Flow are determined.Gas gravity is less than air, and gas leakage sensor is generally arranged on suitably height of top, monitoring point, and mounting base fixedly mounts upward.The place of easily assembling rock gas for part dead corner etc., generally can arrange gas leakage sensor.In order to get rid of micro-leakage hidden danger, gas leakage sensor setting point should be near leakage point; Leak infringement sensor for fear of leakage point fulminant, gas leakage sensor setting point from leakage point should be suitably away from some, this itself is exactly conflict.Heavily block for LNG, the fuel gas bottle of storage of fuels is mounted in frame assembly, and then frame assembly is installed on vehicle frame again.Frame assembly is generally the space of an opening, therefore gas leakage sensor is also in open space, adopt base plate to be arranged on the top of pipeline, valve upward or by the mounting means of sidewall, and press vehicle heading slow astern set a distance, be convenient to the Leak Detection of rock gas.
The fuel gas leak alarm systems that heavily blocks main use taking LNG on market describes as example, as shown in Figure 1, Figure 2, Figure 3 shows, after pilothouse 1, the valve pipeline connecting in LNG fuel gas bottle 21 and fuel gas bottle 21 is arranged in frame assembly 3, and frame assembly 3 is arranged on vehicle frame 5 again.Multiple valves 18 and pipeline 19 will be attached in fuel gas bottle 21, between valve 18 and pipeline 19, rely on joint 20 to be connected, and junction is also the position that leakage easily occurs.The rear inflammable gas of valve 18 of opening fuel gas bottle 21 arrives voltage stabilizer 7 by pipeline 6, then arrives combustion gas filter cleaner 9 by pipeline 8 and enters engine 11 afterwards.Gas leakage sensor 2,4,10 is arranged on the top of each pipe interface or combustion gas filter cleaner 9, be used for catching the gas leakage information at pipe interface and combustion gas filter cleaner place, then carry out sound and light alarm by the Fuel Gas Leak Alarm 12 that is arranged on pilothouse 1 the inside.
Due to gas leakage sensor 2,4,10 environment of living in non-stable sealed environment or improper due to the position of gas detecting alarm system being installed, the height of position is subject to the Effects of Density of gas, thus the accuracy deficiency that causes gas detecting alarm system to detect.In fact consider what frame assembly 3 can not be designed to seal for traffic safety, because should allow the combustion gas of leaking evaporate into as early as possible in air to reduce concentration prevent exploding just in case valve 18 below of fuel gas bottle 21, pipeline 19 occur to leak, the detection of this and gas leakage has also formed conflict.Heavily block at LNG, use gas leakage alarm technology still to have following problem: the firstth, false alarm, when flammable gas alarm is used to open space, in order to increase safety coefficient, detectable concentration to the gas leaking is lower than alarm criteria value far away, and therefore human pilot will bear the puzzlement of false alarm; The secondth, fail to report police, because installing space is more open, be subject to the impact of extraneous factor, in the situation such as travel under the tailwind conditions higher than the speed of a motor vehicle at wind speed as vehicle or travel under crosswind condition, although sensor has retreated certain distance in travel direction, leakage situation is difficult to find, even if actual leakage rate is considerably beyond alarming value, but the leakage value that sensor detects is less, easily cause the phenomenon of not reporting to the police; The 3rd because valve is many, pipe joint many and disperse to cause sensor in fuel gas leak alarm systems to need many places to arrange, and has the problem that cost is higher.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, provide a kind of can be to adopting the system that more accurately report to the police as the gas leakage of the vehicle of fuel of inflammable gas, and be specially adapted to LNG and heavily block.
For achieving the above object, specific embodiments of the invention provide following technical scheme:
A kind of vehicle gas leakage alarm system, comprising: frame assembly, is provided with fuel gas bottle and attaches to valve, the pipeline of described fuel gas bottle in described frame assembly; Gas leakage sensor; Alarm; Fixed cover; Kuppe, described kuppe one end is that large opening one end is little opening; Described gas leakage installation of sensors is electrically connected in described fixed cover and with described alarm, the little opening of described kuppe is communicated with described fixed cover, and the large opening of described kuppe covers at least part of joint top between described valve and pipeline but do not seal described frame assembly.
Preferably, described kuppe is flexible fluid-directing cover.
Preferably, above-mentioned vehicle gas leakage alarm system also comprises the voltage stabilizer and the combustion gas filter cleaner that are communicated with described fuel gas bottle, and described voltage stabilizer or described combustion gas filter cleaner are positioned at described kuppe below.
Preferably, perforate on described fixed cover.
Preferably, described kuppe comprises the bracing ring of corrugated cover body and the described cover body of support.
Preferably, described cover body is manufactured by fire proofing.
In the present invention, utilize flexible kuppe to cover the top of at least a portion joint in the multiple joints between valve and pipeline, not closed frame assembly of while, therefore opening and the travel safety of frame assembly had both been kept, reduce again the impact of the environmental factors such as wind speed on gas concentration, the combustion gas of leaking is detected by sensor after kuppe enters fixed cover again, trigger alarm device is reported to the police, what the sensitivity of sensor needn't arrange is too high or too low, thus the probability that has reduced false alarm or do not reported to the police.Meanwhile, it is more flexible that the position of sensor also becomes, and needn't only be arranged on the rear of travel direction, and this is favourable for being avoided with the interference of miscellaneous part.And multiple location settings sensors that also needn't be in frame assembly.
Further; adopt flexible fluid-directing cover; thereby not only make large opening shape, variable open area cover joint more and improve the combustion gas ability of collecting; and make gas leakage sensor can be disposed in farther position but do not affect detection effect, and just in case when there is fulminant and revealing kuppe can also absorption portion impulsive force protection sensor.
Further, voltage stabilizer and combustion gas filter cleaner are also arranged on behind kuppe below, and the combustion gas that multiple gas leakage points that may exist leak all diversed cover is guided to a sensor, needn't sensor be set at each gas leakage point, reduce number of probes, thereby reduced cost.
Further, the opening on fixed cover is convenient to unnecessary combustion gas and is discharged from fixed cover, avoids combustion gas in fixed cover, to accumulate the detection of sensor is impacted for a long time.
Further, kuppe structure of the present invention is applicable to different fuel gas bottle and line arrangement.
Brief description of the drawings
Next in connection with accompanying drawing, the specific embodiment of the present invention is described in further details, wherein:
Fig. 1 is the fuel gas leak alarm systems front view that in prior art, LNG heavily blocks;
Fig. 2 is the fuel gas leak alarm systems vertical view that the LNG in Fig. 1 heavily blocks;
Fig. 3 is near installation of sensors position enlarged diagram Fig. 1 middle frame assembly;
Fig. 4 is the warning system front view of embodiments of the invention;
Fig. 5 is the vertical view of the warning system of embodiments of the invention;
Fig. 6 is the sectional view of the kuppe of embodiments of the invention.
Description of symbols in upper figure: pilothouse 1, gas leakage sensor 2, frame assembly 3, gas leakage sensor 4, vehicle frame 5, pipeline 6, voltage stabilizer 7, pipeline 8, combustion gas filter cleaner 9, gas leakage sensor 10, engine 11, alarm 12, fixed cover 13, kuppe 14, clip 15, cover body 16, bracing ring 17, valve 18, pipeline 19, joint 20.
Embodiment
In conjunction with Fig. 4, Fig. 5, visible different from the prior art shown in Fig. 1 to Fig. 3, in the vehicle gas leakage alarm system of embodiments of the invention, increase fixed cover 13 and kuppe 14.Fixed cover 13 can be formed or be formed with plastic material injection moulding by metal material punching press, has certain rigidity.And preferably kuppe 14, by manufactures such as such as Polyvinylchloride of fire proofing, and has certain flexibility, both kuppe 14 was deformable to a certain extent.Kuppe 14 lower ends are that large open upper end is little opening, and its medium and small opening is communicated with fixed cover 13 and passes through clip 15 or screw etc. and install fastening.More high-visible by Fig. 4, although attach to very complicated that valve 18 in fuel gas bottle 21 and pipeline 19 arrange, and between valve 18 and pipeline 19, need multiple joints 20 to connect, but as long as the large opening of kuppe 14 covers the convenient effect that can play the combustion gas that well collects leakage at least part of joint 20, the quantity of the joint 20 that the large opening of kuppe 14 covers is certainly The more the better.It is best that in desirable layout situation, the large opening of kuppe 14 can cover whole joints 20, but this is irrealizable substantially in actual arrangement, particularly for heavily blocking, substantially cannot realize the LNG that adopts multiple fuel gas bottle 21 whole coverings of joint 20.In any case and, thereby the large opening of kuppe 14 can not all cover whole frame assembly 3 closed frame assemblies 3, so both ensured that the combustion gas of leaking can be collected detection, and can make again the combustion gas of these leakages be dissipated to as early as possible surrounding environment, taken into account detection accuracy and security.Gas leakage sensor 2 is installed in fixed cover 13 and is electrically connected with alarm 12.In the time that the rock gas in fuel gas bottle 21 occurs to leak, this leakage usually occurs in the position of joint 20, because gas gravity is less than air, at this moment the combustion gas meeting leaked upwards enters fixed cover 13 through kuppe 14, thereby the gas leakage sensor 2 being fixed in cover 13 detects, and trigger alarm device 12 is reported to the police.Joint detection more than 20 effect covering due to kuppe 14 is better, and needed sensor is fewer, and it is favourable therefore one in the voltage stabilizer in Fig. 17 and combustion gas filter cleaner 9 or both being all arranged on to kuppe 14 belows.For the combustion gas in fixed cover 13 is dissipated as early as possible, on fixed cover 13, perforate is favourable simultaneously.
With reference to figure 6, in the present embodiment, kuppe 14 comprises the bracing ring 17 of undulatory cover body 16 and support cover body 16, makes like this kuppe 14 possess certain flexible scope, has both had certain flexibility, has impact resistance concurrently simultaneously.
Although the present invention is described in detail according to above-described embodiment; but protection scope of the present invention is not defined to above-described embodiment; and be only subject to the restriction of claim; those of ordinary skill in the art can carry out equivalent modifications or be equal to replacement above-described embodiment easily, but do not leave protection scope of the present invention.
Claims (6)
1. LNG heavily blocks a fuel gas leak alarm systems, it is characterized in that, comprising:
Frame assembly, is provided with fuel gas bottle and attaches to valve, the pipeline of described fuel gas bottle in described frame assembly;
Gas leakage sensor;
Alarm;
Fixed cover;
Kuppe, described kuppe one end is that large opening one end is little opening;
Described gas leakage installation of sensors is electrically connected in described fixed cover and with described alarm, the little opening of described kuppe is communicated with described fixed cover, and the large opening of described kuppe covers at least part of joint top between described valve and pipeline but do not seal described frame assembly.
2. LNG according to claim 1 heavily blocks fuel gas leak alarm systems, it is characterized in that, described kuppe is flexible fluid-directing cover.
3. LNG according to claim 1 heavily blocks fuel gas leak alarm systems, it is characterized in that, also comprises the voltage stabilizer and the combustion gas filter cleaner that are communicated with described fuel gas bottle, and described voltage stabilizer or described combustion gas filter cleaner are positioned at described kuppe below.
4. LNG according to claim 1 heavily blocks fuel gas leak alarm systems, it is characterized in that, perforate on described fixed cover.
5. LNG according to claim 1 heavily blocks fuel gas leak alarm systems, it is characterized in that, described kuppe comprises corrugated cover body and supports the bracing ring of described cover body.
6. LNG according to claim 5 heavily blocks fuel gas leak alarm systems, it is characterized in that, described cover body is manufactured by fire proofing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227782.2A CN103971491B (en) | 2014-02-13 | 2014-05-26 | A kind of LNG heavily card fuel gas leak alarm systems |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050346.2A CN103759899A (en) | 2014-02-13 | 2014-02-13 | Gas leakage alarm system of LNG heavy truck |
| CN2014100503462 | 2014-02-13 | ||
| CN201410050346.2 | 2014-02-13 | ||
| CN201410227782.2A CN103971491B (en) | 2014-02-13 | 2014-05-26 | A kind of LNG heavily card fuel gas leak alarm systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103971491A true CN103971491A (en) | 2014-08-06 |
| CN103971491B CN103971491B (en) | 2016-04-20 |
Family
ID=50527174
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410050346.2A Pending CN103759899A (en) | 2014-02-13 | 2014-02-13 | Gas leakage alarm system of LNG heavy truck |
| CN201420275181.4U Withdrawn - After Issue CN203849841U (en) | 2014-02-13 | 2014-05-26 | LNG heavy truck combustion gas leakage alarm system |
| CN201410227782.2A Active CN103971491B (en) | 2014-02-13 | 2014-05-26 | A kind of LNG heavily card fuel gas leak alarm systems |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410050346.2A Pending CN103759899A (en) | 2014-02-13 | 2014-02-13 | Gas leakage alarm system of LNG heavy truck |
| CN201420275181.4U Withdrawn - After Issue CN203849841U (en) | 2014-02-13 | 2014-05-26 | LNG heavy truck combustion gas leakage alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN103759899A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759899A (en) * | 2014-02-13 | 2014-04-30 | 安徽江淮汽车股份有限公司 | Gas leakage alarm system of LNG heavy truck |
| CN105092185B (en) * | 2015-04-28 | 2017-10-31 | 浙江金刚汽车有限公司 | Dual-fuel automobile air-tightness and aeration detection means and its control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2438187Y (en) * | 2000-08-17 | 2001-07-04 | 洪剑平 | Flow guide dynamic gas leakage testing and alarm device |
| JP2007079667A (en) * | 2005-09-12 | 2007-03-29 | Ricoh Elemex Corp | Gas leakage alarm system |
| CN202230585U (en) * | 2011-09-27 | 2012-05-23 | 天津市浦海新技术有限公司 | Gas leakage alarm |
| CN202904826U (en) * | 2012-11-30 | 2013-04-24 | 浙江海洋学院 | Natural gas leakage detecting and alarming device |
| CN203267897U (en) * | 2013-05-28 | 2013-11-06 | 十堰震序汽车部件有限公司 | Gas vehicle leakage warning device |
| CN203849841U (en) * | 2014-02-13 | 2014-09-24 | 安徽江淮汽车股份有限公司 | LNG heavy truck combustion gas leakage alarm system |
-
2014
- 2014-02-13 CN CN201410050346.2A patent/CN103759899A/en active Pending
- 2014-05-26 CN CN201420275181.4U patent/CN203849841U/en not_active Withdrawn - After Issue
- 2014-05-26 CN CN201410227782.2A patent/CN103971491B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2438187Y (en) * | 2000-08-17 | 2001-07-04 | 洪剑平 | Flow guide dynamic gas leakage testing and alarm device |
| JP2007079667A (en) * | 2005-09-12 | 2007-03-29 | Ricoh Elemex Corp | Gas leakage alarm system |
| CN202230585U (en) * | 2011-09-27 | 2012-05-23 | 天津市浦海新技术有限公司 | Gas leakage alarm |
| CN202904826U (en) * | 2012-11-30 | 2013-04-24 | 浙江海洋学院 | Natural gas leakage detecting and alarming device |
| CN203267897U (en) * | 2013-05-28 | 2013-11-06 | 十堰震序汽车部件有限公司 | Gas vehicle leakage warning device |
| CN203849841U (en) * | 2014-02-13 | 2014-09-24 | 安徽江淮汽车股份有限公司 | LNG heavy truck combustion gas leakage alarm system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103759899A (en) | 2014-04-30 |
| CN103971491B (en) | 2016-04-20 |
| CN203849841U (en) | 2014-09-24 |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |