Vehicle and its LNG feed systems
This disclosure relates to vehicular field, in particular it relates to a kind of LNG feed systems and including the LNG feed systems
In vehicular field, using engine of the liquefied natural gas (Liquefied Natural Gas, LNG) as fuel,
The liquefied natural gas that its fuel supply principle is previously stored inside holding vessel passes through Pipeline transport to vaporizer, by pipe after vaporization
Road is delivered to engine.
In traditional LNG engine vehicles, safety valve only is installed at liquefied natural gas storage tanks end, can so be ensured
When holding vessel is by long-term use or when holding vessel damage occurs and causes internal pressure to raise, safety valve is opened in time, discharges superpressure
Gas, avoid explosion accident.However, installed in holding vessel end safety valve holding vessel liquid valve close after, only to storage
Deposit tank and carry out overpressure protection in itself, aft section (i.e. the pipeline portions of vaporizer to engine) unprotect of holding vessel is made
With.If there are engine misses, water pipe is suppressed in the case of waiting indefinitely, the liquefied natural gas in holding vessel aft section may be because rapid
Vaporize and cause pressure rise and can not discharge, there is blast when serious.
Utility model content
The purpose of the disclosure is to provide a kind of LNG feed systems, and the LNG feed systems can be in engine misses, water pipe
Suppress in the case of waiting indefinitely, avoid each pipeline and equipment in LNG feed systems from being exploded because of superpressure, improve LNG feed systems
To achieve these goals, the disclosure provides a kind of LNG feed systems, and the LNG feed systems include storage LNG
Holding vessel, vaporizer and engine, the holding vessel connected by the first pipeline with the vaporizer, the LNG supplies system
System includes surge tank, the vaporizer by the second pipeline connection in the surge tank, the surge tank by the 3rd pipeline and
The engine connection, and the safety device for reducing pressure is provided with the surge tank.
Alternatively, the safety device is surge tank safety valve or the safe valve group of surge tank.
Alternatively, the safe valve group of the surge tank safety valve or surge tank is arranged on the air inlet or outlet of the surge tank
Alternatively, the Opening pressure of the safe valve group of the surge tank safety valve or surge tank is 2bar~5bar.
Alternatively, liquid stop valve is provided with out on the liquid outlet of the holding vessel.
Alternatively, LNG feed systems include pressure gauge, and the pressure gauge is connected to the vaporizer by measuring pipeline.
Alternatively, holding vessel safety valve or the safe valve group of holding vessel are provided with the holding vessel.
Alternatively, the Opening pressure of the safe valve group of the holding vessel safety valve or holding vessel is less than the surge tank safety valve
Or the Opening pressure of the safe valve group of surge tank.
Second purpose of the disclosure is to provide a kind of vehicle, and the vehicle explodes when fuel can be avoided to supply, so as to
With higher security.
To realize above-mentioned second purpose, the disclosure provides a kind of vehicle for including above-mentioned LNG feed systems.
Pass through above-mentioned technical proposal, it is provided for reducing the safety device of pressure on surge tank, LNG can be avoided to supply
Each pipeline and equipment are exploded because of superpressure in system, improve the security of LNG feed systems, correspondingly increase including
The security of the vehicle of LNG feed systems.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not form the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is the schematic diagram according to the LNG feed systems of disclosure illustrative embodiments.
Description of reference numerals
The engine of 1 holding vessel, 2 vaporizer, 3 surge tank 4
The surge tank safety valve of 5 first 6 second the 3rd pipeline of pipeline 7 of pipeline 8
The air inlet of 9 holding vessel safety valve, 10 stop valve, 11 pressure gauge 31
32 gas outlets
The embodiment of the disclosure is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.
Referring to Fig. 1, the LNG feed systems according to disclosure illustrative embodiments are shown, the LNG feed systems are main
For in vehicle, therefore the disclosure further relates to the vehicle that includes the LNG feed systems, nevertheless, the disclosure should not limit
In the application.
In embodiment shown in Fig. 1, LNG feed systems include holding vessel 1, vaporizer 2, the surge tank 3 being sequentially communicated
With engine 4.Specifically, holding vessel 1 is connected by the first pipeline 5 with vaporizer 2, and vaporizer 2 is communicated in by the second pipeline 6
Surge tank 3, surge tank 3 are connected by the 3rd pipeline 7 with engine 4.
In said structure, holding vessel 1 is used to store LNG fuel, and liquid stop valve is provided with out on the liquid outlet of holding vessel 1
10, to open or close the first pipeline 5, generally, it is full-opening valve to go out liquid stop valve 10, to provide LNG to vaporizer 2.In addition, storage
Deposit and holding vessel safety valve 9 or the safe valve group of holding vessel are provided with tank 1, in holding vessel 1 by long-term use or holding vessel damages
Bad when, holding vessel safety valve 9 or the safe valve group of holding vessel can open in time, discharge over-pressure gas, avoid explosion accident.Such as figure
Shown in 1, holding vessel 1 is arranged to store safe valve group, i.e., including the first holding vessel safety valve and the second holding vessel safety valve, works as storage
When depositing the internal pressure of tank 1 more than the first preset value, the first holding vessel safety valve is opened and is vented, further, when the internal pressure of holding vessel 1 surpasses
When crossing the second preset value, second preset value is more than the first preset value, and the second holding vessel safety valve is opened and is vented, to reduce storage
Deposit the internal pressure of tank 1.In LNG feed systems, vaporizer 2 can be connected by cooling line with engine cool water system, so as to
The liquefied natural gas or the natural gas vaporization of gas-liquid mixed being fed into vaporizer 2, hereafter again will via surge tank 3 into gas
Gaseous natural gas is collected and is supplied to engine 4, and then provides power for whole vehicle.
As it was previously stated, in the case of in order to avoid suppressing and waiting indefinitely in engine misses, water pipe, especially going out at liquid stop valve 10
Under cut-off state, holding vessel 1 does not connect with aft section, and liquefied natural gas therein is because of effect of environmental temperature rapid vaporization
And cause pressure rise and can not discharge, and then cause to explode, the disclosure is provided with the peace for reducing pressure on surge tank 3
Full device.As can be seen that natural gas of the source pressure of the aft section of holding vessel 1 after vaporization, therefore, safety device is set
Surge tank 3 after vaporizer 2 can quickly reduce pressure, avoid each pipeline and equipment in LNG feed systems from being sent out because of superpressure
Raw blast, improve the security of LNG feed systems.
Wherein, above-mentioned safety device can be a variety of devices or part that can reduce pressure, for example, safety device is slow
Rush tank safety valve 8 or the safe valve group of surge tank.It is similar with foregoing holding vessel safety valve 9 or the safe valve group of holding vessel, surge tank peace
Full valve 8 or the safe valve group of surge tank can be air bleeding valve, to reduce the internal pressure of surge tank 3.In the embodiment of the disclosure,
Surge tank safety valve 8 is provided with surge tank 3, specifically, surge tank safety valve 8 is arranged at the gas outlet 32 of surge tank 3.
In other variants of the disclosure, surge tank safety valve 8 can also be arranged at the air inlet 31 of surge tank 3, Huo Zhe
Surge tank safety valve 8 or the safe valve group of surge tank, these arrangement sides are set respectively at the air inlet 31 of surge tank 3 or gas outlet 32
Formula belongs to the protection domain of the disclosure.
According to practical application, in the disclosure, the Opening pressure of holding vessel safety valve 9 or the safe valve group of holding vessel is less than buffering
The Opening pressure of tank safety valve 8 or the safe valve group of surge tank.Specifically, surge tank safety valve 8 or the safe valve group of surge tank are opened
It is 2bar~5bar to open pressure, both may insure that gaseous natural gas can be stably supplied to engine, is able to ensure that again whole
The security of feed system.
In addition, referring to Fig. 1, LNG feed systems can also include pressure gauge 11, the pressure for position needed for display system
Power.In the disclosure, pressure gauge 11 is connected to vaporizer 2 by measuring pipeline, to show the internal pressure in vaporizer 2.According to pressure
The display result of table 11, correspondingly safety measure etc. can be taken in the case where pressure is larger.
Based on above-mentioned LNG feed systems, the vehicle that the disclosure includes the LNG feed systems correspondingly has higher peace
The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical scheme of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought, it should equally be considered as disclosure disclosure of that.