CN110683501B - Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag - Google Patents
Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag Download PDFInfo
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- CN110683501B CN110683501B CN201910939925.5A CN201910939925A CN110683501B CN 110683501 B CN110683501 B CN 110683501B CN 201910939925 A CN201910939925 A CN 201910939925A CN 110683501 B CN110683501 B CN 110683501B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a vacuum-pumping fuel oil filling method of an oil tank with an elastic bag, which comprises the steps of preparing before filling, inflating the rigid oil tank to reach a specified pressure, vacuumizing the elastic bag to enable the elastic bag to reach a specified vacuum state, filling fuel oil into the elastic bag to enable the fuel oil to fill the oil tank, calculating the reserved air cushion quantity delta V, discharging the fuel oil, reserving the air cushion delta V, and removing after filling. The method can reliably and practically realize the work of filling fuel into the fuel tank and reserving the air cushion, and provides beneficial reference for the work of filling fuel into the similar products.
Description
Technical Field
The invention belongs to the technical field of fuel oil filling, and particularly relates to a vacuum-pumping type fuel oil filling method for an oil tank with an elastic bag.
Background
Fuel filling is an indispensable process for electromechanical products powered by internal combustion engines. The method for filling fuel oil to the electromechanical products is different according to different fuel tank structures. According to the difference of the internal structure of the oil tank, the oil tank is divided into an oil tank containing an elastic bag and an oil tank without the elastic bag. The oil tank containing the elastic bag is divided into an oil filling mode inside the elastic bag and an oil filling mode outside the elastic bag.
The fuel filling process of the fuel tank adopting the fuel filling mode in the elastic bag is complex, the elastic bag is ensured to be completely filled with fuel, a certain amount of inert gas is filled in the rigid fuel tank to serve as an air cushion, and the air cushion is used for ensuring that the pressure in the fuel tank can be adjusted through a safety valve connected with the rigid fuel tank along with the change of the environmental temperature in the process of long-term storage of the fuel tank filled with fuel. When the temperature of the oil tank rises, the pressure reaches the threshold value of the safety valve, and the safety valve automatically discharges the gas in the air cushion to keep the pressure in the oil tank stable.
Disclosure of Invention
Technical problem to be solved
The invention provides a vacuum-pumping type fuel filling method for an oil tank containing an elastic bag, which aims to solve the technical problems that the fuel filling work for the oil tank containing the elastic bag can be reliably and conveniently realized, and an electromechanical product can overcome the influence of the change of environmental temperature on the internal pressure of the oil tank in the long-term storage process after an air cushion is reserved.
(II) technical scheme
In order to solve the technical problem, the invention provides a vacuum-pumping type fuel oil filling method of an oil tank containing an elastic bag, wherein a vacuum-pumping type fuel oil filling system used by the fuel oil filling method comprises an oil storage tank, a filling gun, a discharging gun, vacuum-pumping equipment, fuel oil filling equipment, a high-pressure nitrogen gas charging device and a ventilating gun; the fuel storage tank connected to the rear end of the fuel filling equipment is used for storing fuel in a short term; the filling gun is connected with a filling valve of the elastic bag on the rigid oil tank, and the fuel filling equipment is connected with the filling gun through a filling hose to realize the connection of the oil storage tank and the elastic bag; the discharging gun is connected with a discharging valve of the elastic bag on the rigid oil tank, and the discharging gun is connected to the fuel container through a pipeline and used for discharging air in the elastic bag when fuel oil is filled; the rear end of the vacuum pump is connected with a vacuum pumping device of a vacuum tank, and the vacuum pump is connected with the filling gun through a pipeline and used for pumping vacuum to the elastic bag; the high-pressure nitrogen gas charging device is connected with the ventilation gun through a pipeline and is used for providing an inert gas source for the work of a gas-filled cushion in the rigid oil tank; a first valve and a second valve are respectively arranged on pipelines between the vacuumizing equipment and the filling equipment and between the filling gun; the fuel oil filling method comprises the following steps:
s1, preparing before filling, firmly fixing the electromechanical product on the bearing equipment, and connecting various pipelines of the fuel filling system:
s2, inflating the rigid oil tank to reach a specified pressure: opening the high-pressure nitrogen gas charging device, charging pressure into the rigid oil tank, opening the charging valve, and directly exhausting gas outwards from the elastic bag through the charging hose; when the filling hose is not exhausted any more and no fuel flows out, the filling valve and the high-pressure nitrogen gas charging device are closed; opening a gas release valve of the high-pressure nitrogen gas charging device, releasing the pressure in the rigid oil tank, and keeping the gas release valve in an open state all the time;
s3, performing vacuum pumping operation on the elastic bag to enable the elastic bag to reach a specified vacuum state: disconnecting the pipeline of the ventilation gun and the high-pressure nitrogen gas charging device, and connecting the discharge gun into the fuel container; vacuumizing a vacuum tank of vacuumizing equipment, opening a filling valve and a first valve after the pressure is stable, and vacuumizing the elastic bag until the elastic bag meets a certain vacuum degree; after the pressure is stable, closing the filling valve and the first valve;
s4, filling fuel into the elastic bag to enable the fuel to fill the fuel tank: opening the filling valve and the discharging valve; starting the fuel filling equipment and the second valve, and enabling the fuel to enter the elastic bag through the filling gun; when the fuel continuously flows out of the discharging valve and no air bubble exists, the discharging valve is closed; closing the fuel filling equipment, the second valve and the filling valve; taking down a filling gun connected with a filling valve;
s5, calculating the reserved air cushion quantity delta V, discharging fuel oil, and reserving the air cushion delta V:
measuring the fuel temperature, recording as t, unit ℃, according to an air cushion quantity formula: calculating the total discharged fuel volume, namely the reserved air cushion quantity delta V in the unit L; wherein: a. b is a formula coefficient, and is related to the expansion coefficient of the fuel and the total volume of the fuel;
a ventilation gun connected with a ventilation valve is communicated with a high-pressure nitrogen gas charging device 1 through a pipeline to adjust the gas source pressure of the high-pressure nitrogen gas charging device, and nitrogen gas is introduced into a rigid oil tank; leading the tail end of a discharging gun connected with a discharging valve into the measuring cylinder by a pipeline, opening the discharging valve, and closing the discharging valve after the elastic bag discharges delta V fuel oil from the discharging valve;
s6, removing after filling: closing the gas source of the high-pressure nitrogen gas charging device, and closing the ventilation valve after releasing the pressure in the ventilation valve; and finishing fuel oil filling.
Further, in step S2, the rigid oil tank is charged to 0.05MPa to 0.06 MPa; the pressure of the rigid oil tank is kept between 0.05MPa and 0.06MPa during exhaust.
Further, in step S3, the vacuum tank of the vacuum-pumping device is vacuumed to less than-0.09 MPa; after vacuum pumping, the vacuum degree in the elastic bag is not more than-0.09 MPa.
Further, in step S4, the fuel filling pressure is set to 0.04-0.05 MPa.
Further, in step S5, the source pressure of the high-pressure nitrogen inflator is adjusted to 0.04MPa to 0.05 MPa.
(III) advantageous effects
The invention provides a vacuum-pumping fuel oil filling method of an oil tank containing an elastic bag, which comprises the steps of preparing before filling, inflating the rigid oil tank to reach a specified pressure, vacuumizing the elastic bag to enable the elastic bag to reach a specified vacuum state, filling fuel oil into the elastic bag to enable the fuel oil to fill the oil tank, calculating the reserved air cushion quantity delta V, discharging the fuel oil, reserving the air cushion delta V, and removing after filling. The method can reliably and practically realize the work of filling fuel into the fuel tank and reserving the air cushion, and provides beneficial reference for the work of filling fuel into the similar products.
Drawings
FIG. 1 is a schematic diagram illustrating a tank inflation process in a fuel filling method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a vacuum pumping process of the flexible bag in the fuel filling method according to the embodiment of the invention;
fig. 3 is a schematic diagram of a process of reserving an air cushion in the fuel filling method according to the embodiment of the invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In some electromechanical products 1 using liquid fuel such as gasoline, diesel oil and the like as power, an elastic bag assembly is contained in a rigid oil tank 2 for storing fuel, the fuel is stored in an elastic bag 3, and in the working process of the electromechanical products 1, high-pressure gas is filled into the rigid oil tank 2, and the fuel in the elastic bag 3 is squeezed through pressure, so that the fuel can continuously and stably flow to fuel consumption equipment, and the fuel is provided for the fuel consumption equipment such as an internal combustion engine 4 and the like.
The embodiment provides a vacuum-pumping fuel oil filling method for an oil tank with an elastic bag, and a vacuum-pumping fuel oil filling system used in the method comprises an oil storage tank 5, a filling gun 6, a discharging gun 7, a vacuum-pumping device 8, a fuel oil filling device 9, a high-pressure nitrogen gas filling device 10, a ventilating gun 11, an electrical control system, a pipeline system and the like, as shown in fig. 1 to 3.
Wherein, the oil storage tank 5 connected with the rear end of the fuel oil filling equipment 9 is used for storing fuel oil in a short time, and the material of the oil storage tank is a material which is not obviously compatible with the fuel oil and does not cause pollution to the fuel oil. The filling gun 6 is connected with the filling valve 12 of the elastic bag 3 on the rigid oil tank 2, and the fuel filling equipment 9 is connected with the filling gun 6 through a filling hose 13, so that the connection between the oil storage tank 5 and the elastic bag 3 is realized. The bleeder gun 7 is connected to a bleeder flap 14 of the flexible bag 3 on the rigid fuel tank 2, and the bleeder gun 7 is connected to a fuel container 15 by a pipe for enabling the evacuation of air inside the flexible bag 3 when filling with fuel. The rear end of the vacuum-pumping device 8 is connected with a vacuum tank 16, and the vacuum-pumping device is connected with the filling gun 6 through a pipeline and is used for performing vacuum-pumping work on the elastic bag 3. The ventilation gun 11 is connected with a ventilation valve 17 on the rigid oil tank 2, and the high-pressure nitrogen gas charging device 10 is connected with the ventilation gun 11 through a pipeline and used for providing an inert gas source for the work of a charging cushion in the rigid oil tank 2.
The electric control system is used for realizing the operation functions of starting and stopping the filling and discharging processes and indicating relevant parameters of the filling system, the filling pressure of fuel, the fuel temperature and the like. The pipeline system is used for filtering and conveying fuel oil from the oil storage tank 5 to the elastic bag 3.
Furthermore, a first valve 18 and a second valve 19 are provided in the lines between the evacuation device 8 and the fuel filling device 9 and the filling gun 6, respectively.
The vacuumized fuel oil filling method of the embodiment adopts the vacuumized fuel oil filling system, and the fuel oil filling method specifically comprises the following steps:
s1, preparing before filling, firmly fixing the electromechanical product 1 on special bearing equipment, and connecting various pipelines of a fuel filling system:
s2, inflating the rigid oil tank to reach a specified pressure: as shown in figure 1, the high-pressure nitrogen gas charging device 10 is opened, the rigid oil tank 2 is charged with 0.05MPa to 0.06MPa, the charging valve 12 is opened, and the elastic bag 3 directly exhausts the gas outwards through the charging hose 13. And (3) keeping the pressure of the rigid oil tank 2 between 0.05MPa and 0.06MPa during exhaust, and closing the filling valve 12 and the high-pressure nitrogen gas charging device 10 after the filling hose 13 is not exhausted any more and no fuel oil flows out.
And opening a vent valve of the high-pressure nitrogen gas charging device 10 to vent the pressure in the rigid oil tank 2, and keeping the vent valve in an open state all the time.
S3, performing vacuum pumping operation on the elastic bag to enable the elastic bag to reach a specified vacuum state:
as shown in fig. 2, the vent gun 11 is disconnected from the piping of the high-pressure nitrogen inflator 10, and the purge gun 7 is connected to the fuel container 15.
Vacuumizing a vacuum tank 16 of the vacuumizing device 8 to be less than-0.09 MPa, opening a filling valve 12 and a first valve 18 after the pressure is stable, and vacuumizing the elastic bag 3; the suction can be repeated until the vacuum degree in the elastic bag 3 is not more than-0.09 MPa; after the pressure has stabilized, the fill valve 12 and the first valve 18 are closed.
S4, filling fuel into the elastic bag to enable the fuel to fill the fuel tank: opening the fill valve 12 and the purge valve 14; starting the fuel oil filling equipment 9 and the second valve 19, setting the filling pressure at 0.04-0.05 Mpa, and enabling the fuel oil to enter the elastic bag 3 through the filling gun 6; when the fuel continuously flows out at the purge valve 14 and there is no bubble, the purge valve 14 is closed; closing the fuel filling device 9, the second valve 19 and the filling valve 12; the filling gun 6 connected to the filling valve 12 is removed.
S5, calculating the reserved air cushion quantity delta V, discharging fuel oil, and reserving the air cushion delta V:
measuring the fuel temperature, recording as t (DEG C), and according to an air cushion quantity formula: calculating the total discharged fuel volume, namely the reserved air cushion quantity delta V (L); wherein: a. b is a formula coefficient, and is related to the expansion coefficient of the fuel and the total volume of the fuel;
as shown in fig. 3, the aeration gun 11 connected with the aeration valve 17 is communicated with the high-pressure nitrogen aeration device 10 through a pipeline, the air source pressure of the high-pressure nitrogen aeration device 10 is adjusted to be 0.04MPa to 0.05MPa, and nitrogen is introduced into the rigid oil tank 2; the end of the bleeding gun 7 connected to the bleeding valve 14 is introduced into the measuring cylinder 20 through a pipe, the bleeding valve 14 is opened, and the elastic bag 3 discharges Δ V of fuel from the bleeding valve 14, and then the bleeding valve 14 is closed.
S6, removing after filling: closing the gas source of the high-pressure nitrogen gas charging device 10, and closing the ventilation valve 17 after releasing the pressure in the ventilation valve 17; and finishing fuel oil filling.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A vacuumized fuel oil filling method of an oil tank containing an elastic bag is characterized in that a vacuumized fuel oil filling system used by the fuel oil filling method comprises an oil storage tank, a filling gun, a discharging gun, vacuuming equipment, fuel oil filling equipment, a high-pressure nitrogen gas filling device and a ventilating gun; the fuel storage tank connected to the rear end of the fuel filling equipment is used for storing fuel in a short term; the filling gun is connected with a filling valve of the elastic bag on the rigid oil tank, and the fuel filling equipment is connected with the filling gun through a filling hose to realize the connection of the oil storage tank and the elastic bag; the discharging gun is connected with a discharging valve of the elastic bag on the rigid oil tank, and the discharging gun is connected to the fuel container through a pipeline and used for discharging air in the elastic bag when fuel oil is filled; the rear end of the vacuum pump is connected with a vacuum pumping device of a vacuum tank, and the vacuum pump is connected with the filling gun through a pipeline and used for pumping vacuum to the elastic bag; the high-pressure nitrogen gas charging device is connected with the ventilation gun through a pipeline and is used for providing an inert gas source for the work of a gas-filled cushion in the rigid oil tank; a first valve is arranged on a pipeline between the vacuumizing equipment and the filling gun, and a second valve is arranged on a pipeline between the fuel filling equipment and the filling gun;
the fuel oil filling method comprises the following steps:
s1, preparing before filling, firmly fixing the electromechanical product on the bearing equipment, and connecting various pipelines of the fuel filling system:
s2, inflating the rigid oil tank to reach a specified pressure: opening the high-pressure nitrogen gas charging device, charging pressure into the rigid oil tank, opening the charging valve, and directly exhausting gas outwards from the elastic bag through the charging hose; when the filling hose is not exhausted any more and no fuel flows out, the filling valve and the high-pressure nitrogen gas charging device are closed; opening a gas release valve of the high-pressure nitrogen gas charging device, releasing the pressure in the rigid oil tank, and keeping the gas release valve in an open state all the time; wherein, the rigid oil tank is pressurized to 0.05MPa to 0.06 MPa; keeping the pressure of the rigid oil tank between 0.05MPa and 0.06MPa during exhaust;
s3, performing vacuum pumping operation on the elastic bag to enable the elastic bag to reach a specified vacuum state: disconnecting the pipeline of the ventilation gun and the high-pressure nitrogen gas charging device, and connecting the discharge gun into the fuel container; vacuumizing a vacuum tank of vacuumizing equipment, opening a filling valve and a first valve after the pressure is stable, and vacuumizing the elastic bag until the elastic bag meets a certain vacuum degree; after the pressure is stable, closing the filling valve and the first valve; wherein, a vacuum tank of the vacuum-pumping equipment is vacuumized to be less than-0.09 MPa; after vacuum pumping, the vacuum degree in the elastic bag is not more than-0.09 MPa;
s4, filling fuel into the elastic bag to enable the fuel to fill the fuel tank: opening the filling valve and the discharging valve; starting the fuel filling equipment and the second valve, and enabling the fuel to enter the elastic bag through the filling gun; when the fuel continuously flows out of the discharging valve and no air bubble exists, the discharging valve is closed; closing the fuel filling equipment, the second valve and the filling valve; taking down a filling gun connected with a filling valve; wherein the fuel oil filling pressure is set to be 0.04-0.05 Mpa;
s5, calculating the reserved air cushion quantity delta V, discharging fuel oil, and reserving the air cushion delta V:
measuring the fuel temperature, recording as t, unit ℃, according to an air cushion quantity formula: calculating the total discharged fuel volume, namely the reserved air cushion quantity delta V in the unit L; wherein: a. b is a formula coefficient, and is related to the expansion coefficient of the fuel and the total volume of the fuel;
connecting a ventilation gun connected with a ventilation valve with a high-pressure nitrogen gas charging device through a pipeline, adjusting the gas source pressure of the high-pressure nitrogen gas charging device, and introducing nitrogen gas into a rigid oil tank; leading the tail end of a discharging gun connected with a discharging valve into the measuring cylinder by a pipeline, opening the discharging valve, and closing the discharging valve after the elastic bag discharges delta V fuel oil from the discharging valve; wherein, the gas source pressure of the high-pressure nitrogen gas charging device is adjusted to be 0.04MPa to 0.05 MPa;
s6, removing after filling: closing the gas source of the high-pressure nitrogen gas charging device, and closing the ventilation valve after releasing the pressure in the ventilation valve; and finishing fuel oil filling.
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| CN112193058B (en) * | 2020-09-28 | 2021-08-06 | 郑州日产汽车有限公司 | A fuel filling auxiliary device for preventing back flush |
| CN113184201A (en) * | 2021-05-18 | 2021-07-30 | 北京机电工程研究所 | Elastic bag and breather valve combined fuel system temperature compensation device and fuel system |
| CN114061679A (en) * | 2021-11-10 | 2022-02-18 | 四川泛华航空仪表电器有限公司 | High-low temperature oil mass measuring device of intelligent sensor for aviation |
| CN114314490B (en) * | 2021-11-26 | 2024-03-26 | 北京特种机械研究所 | Method for exhausting gas in fuel oil |
| CN114212751B (en) * | 2021-11-26 | 2024-03-26 | 北京特种机械研究所 | Oil-gas separation device |
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