KR102047766B1 - Gas-Liquid Separator - Google Patents

Abstract

The present invention relates to a gas-liquid separator for preventing fuel from flowing out through a vent pipe provided in a fuel tank, and more specifically, is coupled to an upper body and a lower side of the upper body, the upper passageway of which is formed at an upper side thereof. It has a hollow space extending downward from the upper flow path, and includes a lower body formed with a lower flow path on the lower side, the expansion space connects the upper flow path and the lower flow path, the inflow from the vent pipe By separating the fuel contained in the fluid by reducing the velocity of the fluid, the fuel contained in the fluid is separated from the air by its own weight to prevent discharge to the outside, and also flows into the expansion space from the vent pipe. It further includes a porous foam for reducing the velocity of the fluid to be prevented, the re-discharge of the separated fuel, the expansion space By reducing the flow rate of the fluid flowing in gas-liquid separator which relates to increasing the separation efficiency of the fuel.

Description

Gas-liquid separator {Gas-Liquid Separator}

The present invention relates to a gas-liquid separator for preventing fuel from flowing out through a vent pipe provided in a fuel tank, and more particularly, a vent pipe provided in a fuel tank of an aircraft such as a small passenger plane, an unmanned aerial vehicle, a rotary wing or a fixed wing. It relates to a gas-liquid separator for separating the fuel and air flowing out connected to the.

Generally, internal combustion engines using fossil fuels, such as aviation oil, are used to drive small passenger aircraft, drones, rotorcraft, fixed-wing, etc. (collectively referred to as aircraft). A tank is essentially provided. At this time, when refueling the fuel tank, there is a gravity type of refueling by dropping naturally by the gravity of the fuel at a higher position than the fuel tank, but this is because the time required for refueling is long, it is necessary to supply a large amount of fuel in a short time. The aircraft uses a pressure oil supply system in which a hose is connected to a fuel supply port of a fuel tank from a fuel supply device to pump fuel into each tank.

At this time, when fuel is supplied to the fuel tank by a pressure oil supply method, air in the fuel tank is discharged out of the fuel tank in order to prevent damage to the fuel tank due to the internal pressure of the fuel tank as the fuel is filled in the fuel tank. Vent pipes for maintaining a constant pressure inside and outside the fuel tank are connected.

Korean Patent Publication No. 10-1257713 ("Bent Valve", 2013.04.18) describes a technology related to the vent valve provided in the fuel tank of the aircraft as described above, and communicates the interior of the fuel tank and the outside atmosphere Although a vent valve that opens and closes a vent pipe to control a pressure in a fuel tank is known, a conventional vent valve should be formed to open when refueling, so that air discharged through the vent pipe when refueling is supplied. There is a problem that does not prevent the fuel contained in the emission. In addition, since the fuel is discharged through the vent pipe as described above, there is a problem that does not ensure safety against fire during refueling.

Korea Patent Publication No. 10-1257713 ("Bent Valve", 2013.04.18)

The present invention has been made in order to solve the above problems, it is connected to the vent pipe provided on the fuel tank, the fuel is discharged by separating the fuel contained in the fluid discharged through the vent pipe when refueling the fuel tank It is intended to provide a separator to prevent this.

The present invention is connected to the vent pipe provided on the fuel tank in the gas-liquid separator for separating the fuel contained in the fluid flowing through the vent pipe to prevent the outflow of the fuel, the upper passage is formed on the upper side Is coupled to the upper body and the lower side of the upper body, and has an expansion space therein hollowed downward from the upper flow path therein, the lower body comprises a lower body is formed in the lower passage, the expansion space is the upper flow By connecting the furnace and the lower flow path, and forming a flow path through which the fluid introduced from the vent pipe passes, it is formed to have a diameter larger than the diameter of the vent pipe, the gas-liquid separator is the upper body from the direction of gravity It is installed to face upward, the flow rate is reduced by the expansion of the fluid introduced into the expansion space, and the flow upward from the lower body By by the flow rate difference due to the weight of the fuel and the air contained in the fluid to separate the fuel downward, characterized in that for preventing the discharge of the separated fuel.

In addition, the gas-liquid separator is provided in the expansion space of the lower body, a plurality of pores are formed in communication with the inside and outside, reducing the flow rate of the fluid introduced into the expansion space, separated from the fluid introduced from the vent pipe It characterized in that it further comprises a porous foam to absorb the fuel to prevent the re-extraction of the separated fuel.

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In addition, the porous foam is characterized in that made of a hydrophobic material.

In addition, the porous foam further includes an anti-freezing passage formed to communicate the lower flow path and the upper flow path, damage to the fuel tank according to the internal pressure of the fuel tank generated by a plurality of pores of the porous foam is frozen and It is characterized by preventing breakage.

In addition, the gas-liquid separator is further provided in the expansion space, the turbulence generating structure for reducing the flow rate by generating turbulence in the fluid flowing in the expansion space, the turbulence generating structure is the upper flow of the upper body Furnace is formed to extend a predetermined distance downward, the turbulent guide wing is formed to generate a turbulent flow inside the expansion space by the fluid flowing into the expansion space on the outer surface of the extended upper flow path along the outer surface The turbulent induction blade is formed to be spaced apart from the inner surface of the upper body by a predetermined distance, and the outer surface of the upper flow path extending downward by a predetermined distance is formed to contact the inner surface of the upper body. The fluid induced along the outer surface is closed to pivot downward, and the swirled fluid flows into the expansion space. Fluid and the hit is characterized by generating a turbulent flow.

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In addition, the gas-liquid separator is characterized in that the lower side of the upper body and the upper side of the lower body is formed to be removable so that the exchange of the porous foam.

In addition, the gas-liquid separator further comprises a sealing means in contact with the lower side of the upper body and the upper side of the lower body.

The present invention is connected to the vent pipe provided on the fuel tank is a gas-liquid separator for separating the fuel contained in the fluid discharged through the vent pipe when refueling the fuel tank to prevent the fuel is discharged, than the diameter of the vent pipe By reducing the speed of the fluid flowing into the expansion space formed to be large, the fuel contained in the fluid is separated from the air by its own weight to prevent the discharge to the outside.

In addition, the expansion space is provided with a porous foam for reducing the speed of the fluid flowing from the vent pipe, to prevent the re-discharge of the separated fuel and to increase the separation efficiency of the fuel, winter of the micropores of the porous foam It is effective to prevent clogging of the gas-liquid separator due to freezing.

The flow rate of the fluid flowing in the expansion space further includes a turbulent guide blade formed on the outer surface of the upper flow path to flow along the outer surface to generate turbulence inside the expansion space. Can be reduced.

1 is an exemplary view showing a gas-liquid separator provided in the vent pipe of the fuel tank.
2 is a cross-sectional view of the gas-liquid separator according to the first embodiment of the present invention.
3 is a cross-sectional view of a gas-liquid separator according to a second embodiment of the present invention.
4 is a cross-sectional view of a gas-liquid separator according to a third embodiment of the present invention.
5 is a cross-sectional view of a gas-liquid separator according to a fourth embodiment of the present invention.

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

The accompanying drawings are only examples to illustrate the technical idea of the present invention in more detail, and thus the technical idea of the present invention is not limited to the forms of the accompanying drawings.

1 is an exemplary view showing a gas-liquid separator 1000 of the present invention provided in a vent pipe of a fuel tank. Referring to FIG. 1, the gas-liquid separator 1000 stores a fuel tank for storing fuel supplied to an aircraft. It is connected to (10), is provided on the vent pipe 20 connected to the fuel tank 10 to prevent the fuel tank 10 from being damaged by the internal pressure of the fuel tank 10 during refueling. In addition, the vent pipe 20 is preferably installed to face a position higher than the fuel tank 10 so that the fuel filled in the fuel tank 10 is not discharged, the vent pipe 20 by its own weight The occurrence of the sag occurs that the fuel filling the sagging portion of the vent pipe 20 occurs. At this time, when fuel is supplied to the fuel tank 10, a phenomenon in which the fuel remaining in the vent pipe 20 flows out due to the pressure of the fluid ejected into the vent pipe 20 may occur. .

The present invention is provided with the gas-liquid separator 1000 on the vent pipe 20 to solve the above problems, by separating the fuel contained in the fluid flowing in the vent pipe 20 to discharge the fuel It can be prevented, the description of the detailed configuration of the gas-liquid separator 1000 will be described in detail according to each embodiment with reference to the drawings below.

First Embodiment

2 is a cross-sectional view of the gas-liquid separator 1000 according to the first embodiment of the present invention. Referring to FIG. 2, the gas-liquid separator 1000 has an upper body 100 in which an upper flow path 110 is formed. And a lower body 200 coupled to the lower side of the upper body 100 and having an expansion space 220 hollowed downwardly from the upper flow path 110 therein, and having a lower flow path 210 formed below. It may be configured to include.

At this time, the fluid flowing from the vent pipe 20 is sequentially passed through the lower flow path 220-expansion space 220-the upper flow path 110 and the combined with the upper side of the upper body 100 It can exit to the vent pipe (20).

)이 감소하게 되고, 이때, 상대적으로 압력에 의한 압축력이 큰 공기(air)는 팽창하여 속도의 감소가 적은 반면, 상기 유체에 함유된 연료(fuel)는 밀도의 변화가 적어 상기 공기(air)보다 상대적으로 작은 속도를 갖게 된다. 따라서, 상기 연료에 함유된 공기(air)와 연료(fuel)의 밀도의 변화로 인해 상기 공기(air)와 연료(fuel)의 속도차가 발생하여 상기 유체에 함유된 상기 공기(air)와 연료(fuel)가 분리된다.The expansion space 220 is larger than the diameter of the vent pipe 20, the upper flow path 120 and the lower flow path 220 in order to reduce the speed of the fluid flowing from the vent pipe 20 and that it is preferable to be formed so as to have, the vent tube 20 - the fluid having passed through the 210 in the lower flow is flowing into the expansion space 220, the flow cross-section extended diffusion in the expansion space (220) Thus, the dynamic pressure of the fluid flowing in the expansion space 220 (

In this case, air, which has a relatively high compressive force due to pressure, expands and thus decreases in velocity, while fuel contained in the fluid has a small change in density, thus allowing air. It has a relatively small speed. Therefore, due to a change in the density of air and fuel contained in the fuel, a difference in speed between the air and fuel occurs and thus the air and fuel contained in the fluid ( fuel is separated.

In addition, the expansion space 220 is preferably formed so that the upper body 100 faces upward, wherein the fluid flowing through the expansion space 220 flows upward in the expansion space 200. As a result, the weight is subject to the self-gravity due to gravity, the fuel of relatively large mass (fuel) is caused a greater decrease in speed due to the self-weight, and the speed difference between the air and fuel contained in the fluid The fuel is separated from the fluid flowing through the expansion space 220 is dropped below the expansion space 220 and separated from the air (air) only the air (air) in which the fuel (fuel) is separated It may be ejected to the outside through the upper flow path (110). In addition, when fuel injection of the fuel tank 10 is completed, the fuel remaining in the expansion space 220 flows into the fuel tank 10 by its own weight and remains in the vent pipe 20. Can be removed.

In addition, the gas-liquid separator 1000 has both sides (that is, an upper side of the upper body 100 and a lower side of the lower body 200) connected to the vent pipe 20 to connect the vent pipe 20 and a connector. The gas-liquid separator 1000 is provided with a connector to be coupled to correspond to both sides of the gas-liquid separator 1000 in the vent pipe 20 at a point where installation is required. As the separator 1000 may be installed, the gas-liquid separator 1000 may be detachably attached to the vent pipe 20, and may depend on the capacity of the fuel tank 10 or the discharge pressure of the fuel tank 10. The gas-liquid separator 1000 having various sizes and lengths may be applied to the vent pipe 20.

Second Embodiment

3 is a cross-sectional view showing a second embodiment of the present invention, referring to FIG. 3, the gas-liquid separator 1000 according to the second embodiment of the present invention is provided in the expansion space 220 of the lower body 200. It is provided, and may further include a porous foam 300 to absorb the fuel introduced from the vent pipe 20 to prevent the discharge of the fuel.

The porous foam 300 is configured to prevent the discharge of the fuel contained in the fluid flowing from the vent pipe 20, to increase the speed reduction effect of the fluid introduced into the expansion space 220, the fuel In the fuel supply of the pump 10, there is an effect of preventing the re-discharge of the fuel remaining in the expansion space 220 of the gas-liquid separator 1000.

In addition, the porous foam 300 is not limited to the shape thereof, is provided in the expansion space 220 to reduce the speed of the fluid flowing through the expansion space 220, porous foam rubber (foam) rubber) or a lattice-shaped microwire, or the like, and may be formed of a material formed continuously. The porous foam 300 may be variously modified without departing from the gist of the present invention. In addition, the fluid flowing into the expansion space 220 hits the porous foam 300, the speed of the fluid is lowered so that light air (air) is discharged to the outside through the upper flow path 110, relatively Heavy fuel (fuel) may be separated into the expansion space 220 by its own weight to be absorbed in the porous foam (300). In this case, the porous foam 300 may be made of a hydrophobic material so that the fuel can be adsorbed to improve the adsorption rate of the porous foam 300.

In addition, the gas-liquid separator 1000 is preferably formed so that the lower side of the upper body 100 and the upper side of the lower body 200 to be removable so that the porous foam 300 can be exchanged. At this time, the fluid flowing in the gas-liquid separator 1000 through a screw coupling or a separate fastening screw or a fastening structure in which a thread is formed where the lower side of the upper body 100 and the upper side of the lower body 200 abut. It can be combined using a variety of coupling methods to be firmly fixed so as not to be separated in the internal pressure of.

In addition, the gas-liquid separator 1000 further includes a sealing means 120 which is in contact with the lower side of the upper body 100 and the upper side of the lower body 200, the airtightness to the coupling portion of the gas-liquid separator 1000 The sealing means 120 may be formed using a sealing agent such as an annular rubber O-ring.

Third Embodiment

4 is a cross-sectional view showing a third embodiment of the present invention. Referring to FIG. 4, the gas-liquid separator 1000 according to the third embodiment of the present invention includes the porous foam provided in the expansion space 220. 300 may further include a freezing prevention passage 310 formed to communicate the lower passage 210 of the lower body 200 and the upper passage 110 of the upper body 100.

When the freezing passage 310 is blocked by the pore of the porous foam in winter, the back pressure is applied to the expansion space 220 of the gas-liquid separator 1000, the fuel tank through the vent pipe (20) The problem that the internal pressure of (10) cannot be ejected may arise. Accordingly, the gas-liquid separator 1000 according to the third embodiment of the present invention forms the freezing prevention passage 310 in the porous foam 300 so that the pores of the porous foam 300 are blocked. By allowing the fluid flowing from the vent pipe 20 through the freezing prevention passage 310 to be discharged, there is an effect of preventing the fuel tank 10 from being damaged and broken by internal pressure.

According to the above configuration, the gas-liquid separator 1000 has a fluid flowing from the vent pipe 20 enters the expansion space 220 to reduce the flow rate of the fluid, so that the fuel and gas contained in the fluid Is separated, wherein the separated fuel is absorbed by the porous foam 300 and only the gas separated from the fuel is discharged to the outside through the upper flow path 110.

In addition, the gas-liquid separator 1000 according to the third embodiment reduces the efficiency of separating fuel compared to the gas-liquid separator according to the second embodiment, but the pores of the porous foam 300 due to the low temperature in winter Clogged, it is possible to prevent the problem that the fuel tank 10 is broken by not ejecting the internal pressure of the fuel tank 10, during the summer season by using the porous foam 300 according to the second embodiment to improve fuel separation efficiency In the winter, the porous foam 300 having the frost preventing passage 310 according to the third embodiment can be used to prevent the pores of the porous foam 300 from clogging.

Fourth Embodiment

5 is a cross-sectional view illustrating the gas-liquid separator 1000 according to the fourth embodiment of the present invention. Referring to FIG. 5, the gas-liquid separator 1000 is provided in the expansion space 220. It may further include a turbulence generating structure for reducing the flow rate of the fluid by generating turbulence in the fluid flowing in the expansion space 220.

The turbulence generating structure is a configuration for generating turbulence by hitting the fluid flowing into the expansion space 220 by turning the flow of the fluid flowing inside the expansion space 220, generated by the turbulence generating structure Due to turbulence, the flow rate of the fluid flowing in the expansion space 220 is reduced, thereby increasing the separation efficiency of the fuel contained in the fluid.

In the turbulence generating structure according to the fourth embodiment of the present invention, the upper flow path of the upper body 100 is formed by extending a predetermined distance downward, and the expansion space on the outer surface of the extended upper flow path 110. Fluid introduced into the 220 may flow along the outer surface of the turbulence guide blade 410 is formed to generate turbulence in the expansion space 220.

The turbulent induction wing 410 is preferably formed to induce a fluid flowing in the expansion space 220 to collide with the fluid flowing into the expansion space 220, and to be rotatable including a rotating shaft. It may be formed to further improve the strength of the turbulence generated in the expansion space 220.

The gas-liquid separator 1000 of the present invention by the above configuration reduces the flow rate of the fluid flowing from the vent pipe 20 to prevent the fuel contained in the fluid is separated from the air by its own weight to prevent discharge to the outside, In addition, the porous space 300 and the turbulence guide blade 410 for reducing the velocity of the fluid flowing from the vent pipe 20 inside the expansion space 220 to prevent the re-discharge of the separated fuel is further added. Including, reducing the flow rate of the fluid flowing in the expansion space 300 to increase the separation efficiency of the fuel, clogging of the gas-liquid separator 1000 due to the freezing of the micropores of the porous foam 300 in winter The porous foam 300 is formed to prevent the freezing passage 310 to prevent the internal pressure of the fuel tank 10 by the pressure-type oil supply of the fuel tank 10. When discharging through There is an effect of preventing the fuel is discharged through the gas vent pipe (20).

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the scope of the present invention as claimed in the claims.

10: fuel tank 20: vent pipe
1000: Gas-liquid Separator
100: upper body 110: upper flow path
120: sealing means
200: lower body 210: lower channel
220: expansion space
300: porous foam 310: freezing prevention passage
400: turbulence generating structure 410: turbulence induction wing

Claims (9)

In the gas-liquid separator connected to the vent pipe provided on the fuel tank to separate the fuel contained in the fluid flowing through the vent pipe to prevent the outflow of the fuel,
An upper body having an upper passage formed thereon; And
A lower body coupled to the lower side of the upper body, having an expansion space hollowed downwardly from the upper flow path therein, and having a lower flow path formed at the lower side thereof;
Including;
The expansion space,
The upper flow path and the lower flow path are connected to each other to form a flow path through which the fluid introduced from the vent pipe passes, and is formed to have a diameter larger than the diameter of the vent pipe.
The gas-liquid separator,
The upper body is installed to face upward from the direction of gravity,
The flow rate is reduced by the expansion of the fluid introduced into the expansion space, and the fuel is separated downward by the flow rate difference due to the self-weight of the fuel contained in the fluid passing upward from the lower body and the separated fuel. Gas-liquid separator, characterized in that to prevent the discharge of.
delete The method of claim 1,
Is provided in the expansion space of the lower body, a plurality of pores are formed in communication with the inside and outside, to reduce the flow rate of the fluid introduced into the expansion space, to absorb the separated fuel in the fluid introduced from the vent pipe to the separation Porous foam to prevent the re-discharge of the spent fuel;
Gas-liquid separator characterized in that it further comprises.
The method of claim 3, wherein the porous foam
Gas-liquid separator, characterized in that made of a hydrophobic material.
The method of claim 3,
The porous foam is an anti-freezing passage formed to communicate the lower passage and the upper passage,
Including more,
The gas-liquid separator, characterized in that to prevent damage and breakage of the fuel tank due to the internal pressure of the fuel tank generated by the plurality of pores of the porous foam is frozen.
The method of claim 1,
A turbulence generating structure provided in the expansion space to reduce turbulence by generating turbulence in the fluid flowing in the expansion space;
More,
The turbulence generating structure,
The upper flow path of the upper body is formed extending a predetermined distance downward,
The fluid flowing into the expansion space on the outer surface of the extended upper flow passage is made of a turbulent induction wing is formed to flow along the outer surface to generate turbulence inside the expansion space,
The turbulent induction wing is formed to be spaced a predetermined distance from the inner surface of the upper body,
The outer surface of the upper flow passage extending a predetermined distance downward is formed in contact with the inner surface of the upper body, the fluid induced along the outer surface of the turbulent guide blade is closed so as to pivot downward,
And the swirled fluid collides with the fluid flowing into the expansion space to generate turbulent flow.
delete According to claim 3, wherein the gas-liquid separator
A gas-liquid separator, characterized in that the lower side of the upper body and the upper side of the lower body are detachable so that the porous foam can be exchanged.
According to claim 1, wherein the gas-liquid separator
Sealing means in contact with the lower side of the upper body and the upper side of the lower body
Gas-liquid separator characterized in that it further comprises.

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