CN106499943A - Can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle - Google Patents
Can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle Download PDFInfo
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- CN106499943A CN106499943A CN201510557954.7A CN201510557954A CN106499943A CN 106499943 A CN106499943 A CN 106499943A CN 201510557954 A CN201510557954 A CN 201510557954A CN 106499943 A CN106499943 A CN 106499943A
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Abstract
The invention discloses a kind of can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle, including locomotive and the LNG storage tank being arranged on locomotive, the LNG storage tank includes three layers of tank body, interior tank body, first outer tank body and second outer tank body are followed successively by from inside to outside, interior tank body is used for storing liquefied natural gas, closed vacuum heat-insulation interlayer is provided between interior tank body and the first outer tank body, is also equipped with closed vacuum heat-insulation interlayer between the first outer tank body and the second outer tank body；Which is provided with two pressure transducers, by pressure condition in two pressure transducer real-time monitoring inner canister bodies, plays a part of dual fail-safe；Two air vents are set, play a part of dual fail-safe；Vacuum detecting and control device is provided with, so as to ensure the vacuum heat-insulation of interlayer, prevents interior tank body thermal stress increase from producing dangerous；Liquid circulation line is provided with, vortex phenomenon is prevented；It is additionally provided with inert gas import.
Description
Technical field
The invention belongs to technical field transported safely by liquefied natural gas, relating in particular to one kind can monitor in real time pressure and true
The liquefied natural gas carrier vehicle of reciprocal of duty cycle.
Background technology
Natural gas is inflammable and explosive fuel, and natural gas will be liquefied as through ultralow temperature (- 162 DEG C) normal pressure in storage transport
Liquefied natural gas LNG (Liquefied Natural Gas), the storage temperature very bottom of LNG and the danger for being susceptible to explode
And there is no the certain potential safety hazard of person in its filling and storage transportation, this is just to its storage facilities and means of transport
Safe and reliable strict demand is just proposed.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, there is provided a kind of can monitor in real time pressure and vacuum liquefaction
Natural gas transportation car.
The present invention employs the following technical solutions to realize：
A kind of can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle, including locomotive and be arranged on locomotive
LNG storage tank, the LNG storage tank include three layers of tank body, are followed successively by interior tank body, the first outer tank body and second from inside to outside
Outer tank body, interior tank body are used for storing liquefied natural gas, are provided with closed vacuum heat-insulation between interior tank body and the first outer tank body
Interlayer, is also equipped with closed vacuum heat-insulation interlayer between the first outer tank body and the second outer tank body；
Interior tank body is provided with liquid entrance by pipeline, and arranges the first valve on pipeline,
The top of interior tank interior is provided with exhaust apparatus, exhaust apparatus by one-to-two pipeline respectively with air vent and standby
Air vent is connected, and is provided with first pressure sensor and second pressure sensor on the main pipeline of one-to-two pipeline,
The second valve is provided with the subtube of the one-to-two pipeline being connected with air vent in exhaust apparatus, in exhaust apparatus and standby row
Standby second valve is provided with the subtube of the one-to-two pipeline that QI KOU is connected；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is entered with noble gases
Mouth is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import is provided with the 3rd
Valve；
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and in pipeline
On be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump；
Liquid circulation lines, liquid circulation lines are provided with vacuum heat-insulation interlayer between interior tank body and the first outer tank body
Circulation import be arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid
The 5th valve and circulating pump are set gradually along circulation import to loop exit on circulating line；
The first pressure sensor, second pressure sensor and vacuum degree measurement sensor respectively be arranged on locomotive driving
First pressure on the console of room shows that table, second pressure show that table and vacuum show table electrical connection.
In above-mentioned technical proposal, the left end of the second outer tank body is provided with level gauging pipeline, level gauging pipeline upper
Mouth is connected with the top of interior tank body through the second outer tank body with the first outer tank body, and the lower mouth of level gauging pipeline passes through second
Outer tank body is connected with the bottom of interior tank body with the first outer tank body, is set gradually along mouth suitable for reading to lower on level gauging pipeline
There are the 6th valve, liquidometer and the 7th valve.
The advantages of the present invention are：
By pressure condition in first pressure sensor and second pressure sensor real-time monitoring inner canister body, when pressure is excessive
Control the second valve or standby second valve opens (standby second valve is opened when the second valve goes wrong), in internal tank body
Portion deflated with reduce the pressure in inner canister body prevent pressure increase and explode；Using first pressure sensor and
Two pressure transducers are monitored simultaneously can be prevented from causing potential safety hazard because of one of pressure transducer failure, so as to
The effectiveness of pressure monitoring is increased, plays a part of dual fail-safe.Meanwhile, using by air vent and standby air vent and
Control its each self-purging second valve and standby second valve group into double-exhaust control system design, equally can prevent because of which
In an air vent valve failure and cause potential safety hazard, so as to increased the effectiveness of aerofluxuss, equally play dual fail-safe work
With.
(the situation that is especially canned first or there is more air in interior tank body when the canned work of natural gas is carried out
Under), noble gases are filled with into inner storage tank by inert gas import and noble gases uniform distributor, and pass through aerofluxuss
Air in inner storage tank is discharged by device from air vent, so that the content in the gas in inner canister body reaches safe requirement,
Prevent air and natural gas mixing from causing danger.
By the vacuum in vacuum degree measurement sensor real-time monitoring vacuum heat-insulation the interlayer, (vacuum when vacuum declines
Insulating sandwich can not possibly be completely closed, and its vacuum slowly can decline under normal circumstances), vacuum pump simultaneously opened by the 4th valve
Work carries out evacuation, so as to ensure the vacuum heat-insulation of vacuum heat-insulation interlayer, prevents interior tank body thermal stress increase from producing
Dangerous.
The liquefied natural gas of the multiple filling in inner canister body can be made to be sufficiently mixed uniformly by open the circulation pump and the 5th valve,
Prevent vortex phenomenon (during LNG Storage, Transport, it may occur that a kind of non-stability phenomenon for being known as being vortexed.Whirlpool
Rotation be due to filling new LNG liquid in the low temperature storing tank for have been loaded with LNG, or due to LNG in nitrogen preferential evaporation
And it is layered the liquid in storage tank.Each layer liquid after layering is formed each solely under the heating that storage tank perisporium leaks heat
Vertical free convection circulation.The circulation makes the density of each layer liquid constantly change, when the density of adjacent two layers liquid near
During patibhaga-nimitta etc., two liquid layers will occur strong mixing, and so as to cause overheated liquefied natural gas in storage tank, evaporation is drawn in a large number
The accident of sending out).
The first pressure sensor of LNG storage tank, second pressure sensor and vacuum degree measurement sensor respectively be arranged on machine
First pressure on car driver's cabin console shows that table, second pressure show that table and vacuum show table electrical connection, so may be used
So that the safe condition of driver's convenient real-time monitoring LNG storage tank in driver's cabin in driving procedure.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the LNG storage tank in the present invention.
Fig. 3 is the structural representation of the locomotive driving cabin console in the present invention.
Wherein：1 is locomotive, and 2 is LNG storage tank, and G-1 is interior tank body, and G-2 is the first outer tank body, and G-3 is outside second
Tank body, a is exhaust apparatus, and b is noble gases uniform distributor, and K1 is liquid entrance, and K2 is air vent, K2-1
For standby air vent, K3 is inert gas import, and K4 is vacuumizing and exhausting mouth, and L1 is liquid circulation lines, and L2 is liquid
Position measurement pipeline, P1 be first pressure sensor, P2 be second pressure sensor, R be vacuum degree measurement sensor, LG
For liquidometer, D1 is vacuum pump, and D2 is circulating pump, and V1 is the first valve, and V2 is the second valve, and V2-1 is standby second
Valve, V3 are the 3rd valve, and V4 is the 4th valve, and V5 is the 5th valve, and V6 is the 6th valve, and V7 is the 7th valve, and P1-1 is the
One pressure display table, P2-1 are that second pressure shows table, and R-1 is that vacuum shows table.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment.
As shown in Figure 1, involved in the present invention a kind of can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle
Including locomotive 1 and the LNG storage tank 2 being arranged on locomotive；As shown in Figure 2, the LNG storage tank 2 includes three layers
Tank body, is followed successively by interior tank body G-1, the first outer tank body G-2 and the second outer tank body G-3 from inside to outside, and interior tank body is used for storing
Liquefied natural gas, is provided with closed vacuum heat-insulation interlayer, the first outer tank between interior tank body G-1 and the first outer tank body G-2
Be also equipped with closed vacuum heat-insulation interlayer between body G-2 and the second outer tank body G-3, by two-layer vacuum heat-insulation interlayer come
In realizing, the liquefied natural gas of tank interior is heat-insulated with the external world, with avoid liquefied natural gas because temperature raise vaporization cause interior
The danger that the pressure of tank body increases and occurs to explode, compares traditional one layer vacuum heat-insulation interlayer, and the present invention has more safety.
Interior tank body G-1 is provided with liquid entrance K1 by pipeline, and arranges the first valve V1 on pipeline, by liquid
Import and export K1 and complete the canned and discharging operation to liquefied natural gas, the first valve V1 controls the unlatching of liquid entrance K1
And closed mode.
Top inside interior tank body G-1 is provided with exhaust apparatus a, exhaust apparatus a by one-to-two pipeline respectively with air vent
K2 is connected with standby air vent K2-1, and be provided with the main pipeline of one-to-two pipeline first pressure sensor P1 and
Second pressure sensor P2, is provided with the subtube of the one-to-two pipeline being connected with air vent K2 in exhaust apparatus a
Two valve V2, are provided with standby on the subtube of the one-to-two pipeline being connected with standby air vent K2-1 in exhaust apparatus a
Two valve V2-1；Pressure condition in tank body G-1 in first pressure sensor P1 and second pressure sensor P2 real-time monitorings,
Control the second valve V2 or standby second valve V2 unlatchings (to open when the second valve V2 goes wrong standby when pressure is excessive
With the second valve V2), deflated inside internal tank body G-1 with reduce the pressure in inner canister body prevent pressure increase and occur
Blast；Being monitored using first pressure sensor P1 and second pressure sensor P2 simultaneously can prevent because of one of them
Pressure transducer failure and cause potential safety hazard, so as to increased the effectiveness of pressure monitoring, play a part of dual fail-safe.
Meanwhile, using by air vent K2 and standby air vent K2-1 and controlling its each self-purging second valve V2 and standby
The double-exhaust control system design of two valve V2-1 compositions, can equally prevent from causing because of the valve failure of one of air vent
Potential safety hazard, so as to increased the effectiveness of aerofluxuss, equally plays dual fail-safe effect.
Bottom inside interior tank body G-1 is provided with noble gases uniform distributor b, noble gases uniform distributor b with lazy
Property gas feed K3 is connected by pipeline, and be connected with inert gas import K3 in noble gases uniform distributor b
The 3rd valve V3 is provided with pipeline；It is (especially canned first or in interior tank body when the canned work of natural gas is carried out
In the case of there is more air), in order to ensure safety, by inert gas import K3 and noble gases uniform distributor
B is filled with noble gases into inner storage tank, and discharges the air in inner storage tank from air vent K2 by exhaust apparatus a, with
Make the content in the gas in inner canister body reach safe requirement, prevent air and natural gas mixing from causing danger.
Vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2 is provided with vacuumizing and exhausting mouth by pipeline
K4, and vacuum degree measurement sensor R, the 4th valve V4 and vacuum pump D1 is disposed with pipeline；By vacuum
Vacuum in detection sensor R real-time monitoring interlayer, when vacuum declines (interior tank body G-1 and outer tank body G-2 it
Between interlayer can not possibly be completely closed, its vacuum slowly can decline under normal circumstances), the 4th valve V4 opens simultaneously vacuum pump
D1 work carries out evacuation, so as to ensure the vacuum heat-insulation of interlayer, prevents interior tank body thermal stress increase from producing dangerous.
Liquid circulation lines L1, liquid are provided with vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2
The circulation import of body circulation pipeline L1 is arranged on the bottom of interior tank body G-1, and the loop exit of liquid circulation lines L1 is arranged
On the top of interior tank body G-1, on liquid circulation lines L1 along circulation import to loop exit set gradually the 5th valve V5 and
Circulating pump D2；The liquefied natural gas that multiple filling in inner canister body can be made by open the circulation pump D2 and the 5th valve V5
It is sufficiently mixed uniform, prevents vortex phenomenon (during LNG Storage, Transport, it may occur that a kind of be known as being vortexed
Non- stability phenomenon.Vortex is due to filling new LNG liquid in the low temperature storing tank for have been loaded with LNG, or due to LNG
In nitrogen preferential evaporation and be layered the liquid in storage tank.Each layer liquid after layering leaks the heating of heat in storage tank perisporium
Under, form each independent free convection circulation.The circulation makes the density of each layer liquid constantly change, when adjacent two
During the density approximately equal of layer liquid, two liquid layers will occur strong mixing, so as to cause overheated liquefaction day in storage tank
So gas evaporates accidents caused in a large number).
The left end of the second outer tank body G-3 is provided with level gauging pipeline L2, the suitable for reading of level gauging pipeline L2 passes through
Two outer tank bodies G-3 and the first outer tank body G-2 are connected with the top of interior tank body G-1, the lower mouth of level gauging pipeline L2
It is connected through the second outer tank body G-3 and the first outer tank body G-2 with the bottom of interior tank body G-1, on level gauging pipeline
The 6th valve V6, liquidometer LG and the 7th valve V7 are disposed with along mouth suitable for reading to lower；Inner canister is detected by liquidometer LG
Internal liquid level.
As shown in figure 3, first pressure sensor P1, the second pressure sensor P2 of LNG storage tank and vacuum degree measurement are passed
Sensor R respectively with the first pressure display table P1-1, second pressure display table P2-1 being arranged on locomotive driving cabin console
Show that the pressure signal of detection is passed to first pressure display table by table R-1 electrical connections, first pressure sensor P1 with vacuum
P1-1 shows that the pressure signal of detection is passed to second pressure display table P2-1 and shows pressure by pressure, second pressure sensor P2
The vacuum signal of detection is passed to vacuum display table R-1 and shows vacuum by power, vacuum display table R-1, so may be used
So that the safe condition of driver's convenient real-time monitoring LNG storage tank in driver's cabin in driving procedure.
Exemplary description has been done to the present invention above, it should explanation, in the case of the core without departing from the present invention,
Any simple deformation, modification or other skilled in the art can not spend the equivalent of creative work to fall
Enter protection scope of the present invention.
Claims (2)
1. a kind of can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle, including locomotive and be arranged on locomotive
LNG storage tank, it is characterised in that：The LNG storage tank includes three layers of tank body, be followed successively by from inside to outside interior tank body, first
Outer tank body and the second outer tank body, are provided with closed vacuum heat-insulation interlayer, the first outer tank between interior tank body and the first outer tank body
Closed vacuum heat-insulation interlayer is also equipped between body and the second outer tank body；
Interior tank body is provided with liquid entrance by pipeline, and arranges the first valve on pipeline；
The top of interior tank interior is provided with exhaust apparatus, exhaust apparatus by one-to-two pipeline respectively with air vent and standby
Air vent is connected, and is provided with first pressure sensor and second pressure sensor on the main pipeline of one-to-two pipeline,
The second valve is provided with the subtube of the one-to-two pipeline being connected with air vent in exhaust apparatus, in exhaust apparatus and standby row
Standby second valve is provided with the subtube of the one-to-two pipeline that QI KOU is connected；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is entered with noble gases
Mouth is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import is provided with the 3rd
Valve；
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and in pipeline
On be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump；
Liquid circulation lines, liquid circulation lines are provided with vacuum heat-insulation interlayer between interior tank body and the first outer tank body
Circulation import be arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid
The 5th valve and circulating pump are set gradually along circulation import to loop exit on circulating line；
The first pressure sensor, second pressure sensor and vacuum degree measurement sensor respectively be arranged on locomotive driving
First pressure on the console of room shows that table, second pressure show that table and vacuum show table electrical connection.
2. according to claim 1 can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle, its feature exists
In：The left end of the second outer tank body is provided with level gauging pipeline, level gauging pipeline suitable for reading pass through the second outer tank body and
First outer tank body is connected with the top of interior tank body, and the lower mouth of level gauging pipeline is through the second outer tank body and the first outer tank body
Be connected with the bottom of interior tank body, on level gauging pipeline along mouth suitable for reading to lower be disposed with the 6th valve, liquidometer and
7th valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510557954.7A CN106499943A (en) | 2015-09-06 | 2015-09-06 | Can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510557954.7A CN106499943A (en) | 2015-09-06 | 2015-09-06 | Can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106499943A true CN106499943A (en) | 2017-03-15 |
Family
ID=58286282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510557954.7A Pending CN106499943A (en) | 2015-09-06 | 2015-09-06 | Can monitor in real time pressure and vacuum liquefied natural gas carrier vehicle |
Country Status (1)
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|---|---|
| CN (1) | CN106499943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207005A (en) * | 2019-06-30 | 2019-09-06 | 河南查瑞特种设备有限公司 | A kind of mobile natural gas filling vehicle |
-
2015
- 2015-09-06 CN CN201510557954.7A patent/CN106499943A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207005A (en) * | 2019-06-30 | 2019-09-06 | 河南查瑞特种设备有限公司 | A kind of mobile natural gas filling vehicle |
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Application publication date: 20170315 |