CN201461309U - Vacuum insulation device and liquefied natural gas vehicle gassing system - Google Patents
Vacuum insulation device and liquefied natural gas vehicle gassing system Download PDFInfo
- Publication number
- CN201461309U CN201461309U CN2009201102702U CN200920110270U CN201461309U CN 201461309 U CN201461309 U CN 201461309U CN 2009201102702 U CN2009201102702 U CN 2009201102702U CN 200920110270 U CN200920110270 U CN 200920110270U CN 201461309 U CN201461309 U CN 201461309U
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- flange
- natural gas
- liquefied natural
- vacuum insulation
- insulation device
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Abstract
The utility model discloses a vacuum insulation device and a liquefied natural gas vehicle gassing system comprising the same, relating to liquefied natural gas conveying equipment. The liquefied natural gas vehicle gassing system comprises the vacuum insulation device and a liquefied natural gas immersed pump, wherein the vacuum insulation device comprises an inner container, a casing, a liquid inlet pipe, a liquid outlet pipe and a return pipe, the inner container is connected with the casing through a flange and a flange cover, the liquid outlet of the liquefied natural gas immersed pump is away from the upper end face of the flange by 200-300 mm, and the liquid outlet pipe is connected with the liquid outlet hole of the liquefied natural gas immersed pump after passing through the flange. Because the liquid outlet of the liquefied natural gas immersed pump is away from the upper end face of the flange by a spacing distance, the heat-conducting path is extended, the heat transfer of liquefied natural gas in the device to the flange cover is reduced, the surface of the flange is enabled to be in a normal temperature state, and the surface of the flange cover can not freeze and frost.
Description
Technical field
The utility model relates to the LNG Liquefied natural gas conveying equipment, specifically, relates to a kind of vacuum insulation device and the LNGV (liquefied natural gas vehicle) refueling system that comprises this vacuum insulation device.
Background technique
LNG Liquefied natural gas (being called for short LNG) belongs to a kind of clean fuel for vehicle, and along with promoting the use of of LNG automobile, the equipment of LNG association area also is developed.Wherein a kind of latent liquid type liquefied natural gas pump (being called for short latent liquid type LNG pump) extensively is used in the LNG industry, and Large LNG cargo ship, LNG refueling system, LNG receiving station etc. all adopt latent liquid type LNG pump delivering liquid rock gas.Latent liquid type LNG pump mainly is divided into by its mounting point two kinds: a pump and a jar outer pump in jar, and pump is mainly used in LNG storage tank Large LNG cargo ship and LNG receiving station in jar, and a jar outer pump is mainly used in LNG refueling system and other LNG conveying industry.
Carry in the industry in LNG refueling system and other LNG, prior art is that a latent liquid type LNG pump and a vacuum insulation device are used mostly, as shown in Figure 1, the vacuum insulation device 200 of prior art ' comprise feed liquor flange 1, liquid inlet pipe 2, return-air flange 3, muffler 4, flange 5, blind flange 9, shell 11, inner bag 12, latent liquid type LNG pump 14 and fixing bottom-plate 15, between shell 11 and the inner bag 12 multilayer insulation layer 13 is set, latent liquid type LNG pump 14 is arranged in the inner bag 12, the liquid outlet of latent liquid type LNG pump 14 is concordant with the upper-end surface of flange 5, a segment distance (that is to say beyond the outer rim of flange 5 and blind flange 9 protruded in the outer rim of shell 11, the external diameter of flange 5 and blind flange 9 is greater than the external diameter of shell 11), there is following defective in such structure: at first, because the liquid outlet of latent liquid type LNG pump 14 is concordant with the upper-end surface of flange 5, cause vacuum insulation device heat insulation effect bad, large size frosting on the blind flange 9, LNG in the device is vaporized in a large number, cause the waste of rock gas, and influenced pump performance; Secondly, do not have good level gauging means to guarantee the motor of the absolute submergence latent liquid type of the liquid LNG pump in the vacuum insulation device, liquid level is crossed low meeting and is reduced the lubrication effect of pump housing bearing and the cooling-down effect of motor, causes the LNG pump to damage easily; The 3rd, flange 5 and blind flange 9 oversize causes device integral body relatively heavier, is inconvenient to move and transport, and wasted raw material; The 4th, liquid entering hole, return-air mouth, liquid outlet all adopt the individual layer pipe interface, have caused the vaporization of LNG, and especially the vaporization of the liquid entering hole LNG of vacuum insulation device can form cavitation, cause pump performance to descend, even the impeller corrosion failure, and shorten the working life of pump.
The model utility content
Technical problem to be solved in the utility model is the defective at the vacuum insulation device of above-mentioned prior art, provide a kind of simple in structure, good heat insulating and level gauging accurately, move and convenient transportation, and the vacuum insulation device that can play a very good protection to latent liquid type LNG pump.
In order to solve the problems of the technologies described above, the utility model vacuum insulation device, be used for latent liquid type LNG pump, it comprises inner bag, shell, liquid inlet pipe, drain pipe and muffler, described inner bag is connected by flange and blind flange with shell, be provided with the multilayer heat insulation layer between described inner bag and the shell, described latent liquid type LNG pump is placed in the described inner bag, the liquid outlet of described latent liquid type LNG pump and the upper-end surface of described flange are at a distance of 200～300 millimeters, and described drain pipe passes described flange and links to each other with described liquid outlet.
Above-mentioned vacuum insulation device, wherein, the outer rim of described flange is concordant substantially with the outer rim of described shell, and deviation is in 5～10 millimeters scopes; The outer rim of described blind flange is concordant substantially with the outer rim of described shell, and deviation is in 5～10 millimeters scopes. weight that like this can alleviator, and can save material, and convenient moving and transportation.
Above-mentioned vacuum insulation device, wherein, described muffler is positioned at the top of described shell, with apart 350～450 millimeters of described flange upper-end surfaces.
Above-mentioned vacuum insulation device, wherein, one level meter that inserts in the described inner bag is set on the described blind flange, the position that the lower end of described level meter communicates with inner bag near described liquid inlet pipe, accurately the liquid level in the measuring device can guarantee that latent liquid type LNG pump is in submerged state all the time, makes pump housing bearing have good lubricating effect, motor can fully be lowered the temperature, thereby guarantees the service condition and the Security of latent liquid type LNG pump.
Above-mentioned vacuum insulation device, wherein, described multilayer heat insulation layer is entwined by reflecting layer and thermal-protective coating space, has good effect of heat insulation.
Above-mentioned vacuum insulation device, wherein, the part that described muffler and described liquid inlet pipe insert in the described shell is provided with heat insulation layer, described drain pipe is provided with heat insulation layer, thereby has good heat insulation effect, reduced the waste of LNG, and guaranteed that the liquid entering hole of latent liquid type LNG pump cavitation can not take place.
Further, the utility model also provides a kind of LNGV (liquefied natural gas vehicle) refueling system, it comprises liquefied natural gas (LNG) tank, the vacuum insulation device, latent liquid type liquefied natural gas pump and filling machine, described vacuum insulation device comprises inner bag, shell, liquid inlet pipe, drain pipe and muffler, described inner bag is connected by flange and blind flange with shell, be provided with the multilayer heat insulation layer between described inner bag and the shell, described latent liquid type liquefied natural gas pump is placed in the described inner bag, the liquid outlet of described latent liquid type liquefied natural gas pump and the upper-end surface of described flange are at a distance of 200～300 millimeters, and described drain pipe passes described flange and links to each other with described liquid outlet.
Beneficial functional of the present utility model is, after the LNGV (liquefied natural gas vehicle) refueling system adopts above-mentioned vacuum heat-insulation device, because the liquid outlet of latent liquid type liquefied natural gas pump and the upper-end surface of flange are provided with a span, prolonged thermally conductive pathways, reduced the heat transfer of the interior LNG of device to blind flange, make the blind flange surface be in the normal temperature state, the blind flange surface can not freeze, frosting.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the structural drawing of the vacuum insulation device of prior art;
Fig. 2 is the structural drawing of vacuum insulation device of the present utility model;
Fig. 3 is the flange among Fig. 2, the structural drawing of blind flange;
Fig. 4 is the structural drawing of LNG refueling of the present utility model system.
Wherein, reference character
1000 LNG refueling systems
100 LNG storage tanks
200 ' vacuum insulation device
200 vacuum insulation devices
1 feed liquor flange
2 liquid inlet pipes
3 return-air flanges
4 mufflers
5 flanges
51 through holes
6 level meters
7 drain pipes
8 fluid flanges
9 blind flanges
91 through holes
10 pump companion flanges
11 shells
12 inner bags
13 multilayer heat insulation layers
14 latent liquid type LNG pumps
15 fixing bottom-plates
16 pump inlet vacuum lines
17 cryogenic globe valve
18 cryogenic globe valve
19 blowback gas vacuum lines
20 aerators
21 cryogenic globe valve
22 cryogenic globe valve
23 gas-returning devices
24 vacuum feed liquor pipelines
25 vacuum return line
300 filling machines
400 vehicle-mounted gas cylinders
Embodiment
Below in conjunction with the drawings and specific embodiments technical solutions of the utility model being described in detail, further understanding the purpose of this utility model, scheme and effect, but is not the restriction as the utility model claims protection domain.
Consult Fig. 4, LNG refueling of the present utility model system 1000 comprises LNG storage tank 100, vacuum insulation device 200, latent liquid type LNG pump 14 and filling machine 300, filling machine 300 is used for vehicle-mounted gas cylinder 400 aeratings of gas-fueled vehicles, similar with prior art, be provided with vacuum return line 25 between filling machine 300 and the LNG storage tank 100, the front portion of filling machine 300 is provided with aerator 20, cryogenic globe valve 21,22 and gas-returning devices 23, because it all belongs to the content of prior art, just do not describe in detail one by one at this, below the structure of vacuum insulation device 200 is done detailed description.
In conjunction with consulting Fig. 2 and Fig. 3, vacuum insulation device 200 of the present utility model comprises inner bag 12, shell 11, liquid inlet pipe 2, drain pipe 7 and muffler 4, inner bag 12 is connected by flange 5 and blind flange 9 with shell 11, be provided with multilayer heat insulation layer 13 between inner bag 12 and the shell 11, in the latent liquid type LNG pump 14 ccontaining inner bags 12. liquid inlet pipe 2 is arranged on the bottom of shell 11, it is by feed liquor flange 1, pump inlet vacuum line 16 is connected with the vacuum drain line flange of LNG storage tank 100, pump inlet vacuum line 16 is provided with the top that cryogenic globe valve 18. mufflers 4 are arranged on shell 11, it is by return-air flange 3, blowback gas vacuum line 19 is connected with the vacuum return line flange of LNG storage tank 100, the end that blowback gas vacuum line 19 is provided with cryogenic globe valve 17. drain pipes 7 is connected with the liquid outlet of latent liquid type LNG pump 14 by pump companion flange 10, and the other end is by fluid flange 8, vacuum feed liquor pipeline 24 is connected with the vacuum feed liquor pipeline flange of filling machine 300.
Multilayer heat insulation layer 13 adopts reflecting layer and thermal-protective coating space to be entwined, and multilayer heat insulation layer 13 integral body that are entwined are wrapped in inner bag 12 outsides, and the confined space that shell 11 and inner bag 12 are formed is pumped into high vacuum.When LNG charges in the inner bag 12 of vacuum insulation device 200, can long time stored LNG, avoid a large amount of evaporations of LNG, can guarantee that latent liquid type LNG pump 14 is in cold state for a long time, carry out liquid feeding can directly start latent liquid type LNG pump 14.
For the export pipeline that makes latent liquid type LNG pump 14 has good heat insulation effect, to avoid a large amount of vaporizations of LNG, the liquid outlet of latent liquid type LNG pump 14 and the upper-end surface of flange 5 are arranged at a distance of 200～300 millimeters, through hole 91 and through hole 51 (see figure 3)s on the flange 5 that drain pipe 7 passes on the blind flange 9 link to each other with the liquid outlet of latent liquid type LNG pump 14, blind flange 9 passes through screw with flange 5, drain pipe 7 and blind flange 9 welding; Muffler 4 is arranged to and apart 350～450 millimeters of flange 5 upper-end surfaces.Like this,, prolonged thermally conductive pathways, reduced the heat transfer of the interior LNG of vacuum insulation device, made blind flange 9 surfaces be in the normal temperature state, thereby guarantee that blind flange 9 can not freeze, frosting blind flange 9 by increasing the distance between return line interface and the blind flange 9.
Further, the part that muffler 4 and liquid inlet pipe 2 insert in the shell 11 is provided with heat insulation layer, drain pipe 7 is provided with heat insulation layer, make liquid entering hole, return-air mouth, the liquid outlet of vacuum insulation device all form the vacuum insulated piping interface, to have good heat insulation effect, reduce the waste of LNG, and can guarantee that the liquid entering hole of latent liquid type LNG pump 14 cavitation can not take place.
In order to alleviate the weight of vacuum insulation device 200, the outer rim of flange 5 is concordant substantially with the outer rim of shell 11, and deviation that is to say that the external diameter of flange 5 equates substantially with the external diameter of shell 11 in 5～10 millimeters scopes; Equally, the outer rim of blind flange 9 is concordant substantially with the outer rim of shell 11, and deviation is in 5～10 millimeters scopes.
In addition, in order to guarantee the service condition and the Security of latent liquid type LNG pump 14, one level meter 6 that inserts in the inner bag 12 is set on the blind flange 9, this level meter 6 is fixed on the blind flange 9 by joint, the position that the lower end of level meter 6 communicates with inner bag 12 near liquid inlet pipe 2, with the liquid level of LNG in the accurate detection inner bag 12, thereby assurance latent liquid type LNG pump 14 is being worked under the submerged state fully.
In actual use, whole vacuum insulation device 200 is fixed on correct position by fixing bottom-plate 15, LNG in the LNG storage tank 100 in the refueling system 1000 flows to liquid inlet pipe 2 with in the inner bag 12 that enters vacuum insulation device 200 through pump inlet vacuum line 16, because liquid inlet pipe 2 is arranged in the bottom of shell 11, can make LNG rely on difference of liquid level to flow into smoothly in the vacuum insulation device 200, latent liquid type LNG pump 14 fully pre-cold-peaces are soaked.Latent liquid type LNG pump 14 reaches the thermogenetic gas of vacuum insulation device 200 leakages and gets back in the LNG storage tank 100 by muffler 4, blowback gas vacuum line 19 in operation process, muffler 4 is arranged in the top of shell 11, and muffler 4 has 350～450 millimeters apart with flange 5 upper-end surfaces, can effectively make vaporized gas be discharged to LNG storage tank 100 by muffler 4, blind flange 9 no frostings can be guaranteed again, and the heat transfer of environment can be reduced the LNG in the inner bag 12.
When unlatching latent liquid type LNG pump 14 carries out liquid feeding; LNG is through drain pipe 7; the vacuum feed liquor pipeline 24 of filling machine flows to filling machine 300; by being filled in the vehicle-mounted gas cylinder 400 of gas-fueled vehicles after filling machine 300 meterings. because drain pipe 7 adopts the vacuum line form to be welded on the blind flange 9; and directly be connected with latent liquid type LNG pump 14 in that inner bag 12 is inner; also having the delivery side of pump pipeline all is the vacuum line form; reduce pipeline and leaked heat; make the liquid in the pipeline be in liquid phase state; guaranteed the inlet requirement of the mass flowmenter in the filling machine 300. in the liquid feeding process; LNG liquid level in the vacuum insulation device 200 can be along with the reduction of LNG storage tank 100 liquid levels; factors such as the rotating speed size of pump and reducing; but by the liquid level in the level meter 6 effective monitoring vacuum insulation devices 200; working under the submerged state fully to guarantee latent liquid type LNG pump 14; when liquid level is lower than 14 work of certain altitude restriction latent liquid type cryopump, pump is carried out safety protection by an outside chain control gear.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1. vacuum insulation device, be used for the latent liquid type liquefied natural gas pump, it comprises inner bag, shell, liquid inlet pipe, drain pipe and muffler, described inner bag is connected by flange and blind flange with shell, be provided with the multilayer heat insulation layer between described inner bag and the shell, described latent liquid type liquefied natural gas pump is placed in the described inner bag, it is characterized in that, the liquid outlet of described latent liquid type liquefied natural gas pump and the upper-end surface of described flange are at a distance of 200～300 millimeters, and described drain pipe passes described flange and links to each other with described liquid outlet.
2. vacuum insulation device according to claim 1 is characterized in that, the outer rim of described flange is concordant substantially with the outer rim of described shell, and deviation is in 5～10 millimeters scopes.
3. vacuum insulation device according to claim 2 is characterized in that, the outer rim of described blind flange is concordant substantially with the outer rim of described shell, and deviation is in 5～10 millimeters scopes.
4. vacuum insulation device according to claim 3 is characterized in that described muffler is positioned at the top of described shell, with apart 350～450 millimeters of described flange upper-end surfaces.
5. vacuum insulation device according to claim 3 is characterized in that, a level meter that inserts in the described inner bag is set on the described blind flange.
6. vacuum insulation device according to claim 5 is characterized in that, the position that the lower end of described level meter communicates with inner bag near described liquid inlet pipe.
7. vacuum insulation device according to claim 1 is characterized in that, described multilayer heat insulation layer is entwined by reflecting layer and thermal-protective coating space.
8. vacuum insulation device according to claim 1 is characterized in that, the part that described muffler and described liquid inlet pipe insert in the described shell is provided with heat insulation layer.
9. vacuum insulation device according to claim 1 is characterized in that described drain pipe is provided with heat insulation layer.
10. LNGV (liquefied natural gas vehicle) refueling system, comprise liquefied natural gas (LNG) tank, the vacuum insulation device, latent liquid type liquefied natural gas pump and filling machine, described vacuum insulation device comprises inner bag, shell, liquid inlet pipe, drain pipe and muffler, described inner bag is connected by flange and blind flange with shell, be provided with the multilayer heat insulation layer between described inner bag and the shell, described latent liquid type liquefied natural gas pump is placed in the described inner bag, it is characterized in that, the liquid outlet of described latent liquid type liquefied natural gas pump and the upper-end surface of described flange are at a distance of 200～300 millimeters, and described drain pipe passes described flange and links to each other with described liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201102702U CN201461309U (en) | 2009-07-28 | 2009-07-28 | Vacuum insulation device and liquefied natural gas vehicle gassing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201102702U CN201461309U (en) | 2009-07-28 | 2009-07-28 | Vacuum insulation device and liquefied natural gas vehicle gassing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461309U true CN201461309U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201102702U Expired - Lifetime CN201461309U (en) | 2009-07-28 | 2009-07-28 | Vacuum insulation device and liquefied natural gas vehicle gassing system |
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| CN (1) | CN201461309U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182912A (en) * | 2011-02-11 | 2011-09-14 | 张家港富瑞特种装备股份有限公司 | Liquid discharging device of liquefied natural gas filling vehicle |
| CN102797972A (en) * | 2012-09-05 | 2012-11-28 | 韩中枢 | Compressed natural gas filling equipment |
| CN102852758A (en) * | 2012-08-24 | 2013-01-02 | 北京天海工业有限公司 | Full-vacuum pump pool |
| CN103807595A (en) * | 2014-02-19 | 2014-05-21 | 中船圣汇装备有限公司 | Low-temperature storage tank and vacuum immersed pump system |
| CN105298916A (en) * | 2015-11-09 | 2016-02-03 | 中国海洋石油总公司 | Middle-opened type anti-freezing device for LNG immersed pump pool |
| CN106168329A (en) * | 2016-08-25 | 2016-11-30 | 自贡通达机器制造有限公司 | Vertical LNG filling apparatus |
| CN106441473A (en) * | 2016-08-31 | 2017-02-22 | 烟台中隆仪表有限公司 | Precooling-free mass flowmeter |
-
2009
- 2009-07-28 CN CN2009201102702U patent/CN201461309U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182912A (en) * | 2011-02-11 | 2011-09-14 | 张家港富瑞特种装备股份有限公司 | Liquid discharging device of liquefied natural gas filling vehicle |
| CN102852758A (en) * | 2012-08-24 | 2013-01-02 | 北京天海工业有限公司 | Full-vacuum pump pool |
| CN102852758B (en) * | 2012-08-24 | 2015-05-20 | 北京天海工业有限公司 | Full-vacuum pump pool |
| CN102797972A (en) * | 2012-09-05 | 2012-11-28 | 韩中枢 | Compressed natural gas filling equipment |
| CN103807595A (en) * | 2014-02-19 | 2014-05-21 | 中船圣汇装备有限公司 | Low-temperature storage tank and vacuum immersed pump system |
| CN105298916A (en) * | 2015-11-09 | 2016-02-03 | 中国海洋石油总公司 | Middle-opened type anti-freezing device for LNG immersed pump pool |
| CN106168329A (en) * | 2016-08-25 | 2016-11-30 | 自贡通达机器制造有限公司 | Vertical LNG filling apparatus |
| CN106441473A (en) * | 2016-08-31 | 2017-02-22 | 烟台中隆仪表有限公司 | Precooling-free mass flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |