KR200260459Y1 - Ventilation Structure of LPG Fuel Tank for Vehicle - Google Patents

Abstract

The present invention relates to a ventilation structure (1) applied to a vehicle LPG fuel tank that can safely discharge the leaked gas out of the vehicle, and can pipe and wire various LPG pipes and wires, and is not easily damaged by external shocks. will be. According to the present invention, a valve container provided with a plurality of valves (3A) for controlling the entry and exit of LPG to the LPG fuel tank (2) of the vehicle and a flow meter (3B) indicating the LPG filling amount of the fuel tank (2) Ventilation structure 1 of a vehicle LPG fuel tank for discharging leakage gas from 3) is provided. Ventilation structure (1) of the present invention, both sides of the valve container (3) is formed with a discharge port for ventilation, respectively, one of the discharge port (4) a ventilation pipe 10 for discharging the leaking gas to the outside of the vehicle ) Is mounted and the other is sealed with a cap (5). The ventilation pipe 10 is comprised from the 1st ventilation pipe 20 and the 2nd ventilation pipe 30. As shown in FIG. The first vent pipe 20 is connected to the discharge port 4, is made of high strength hard rubber, extends from the valve container 3 to the side of the fuel tank 2, and the LPG filling pipe from the valve container 3 The filling pipe branch pipe 21 in which 6 is drawn out is formed integrally. The 2nd ventilation pipe 30 connects between the 1st ring engine 20 and the ventilation hole 7 formed in the bottom surface of the vehicle, is formed as a flexible pipe, and is elongated, and the electric wire from the valve container 3 is extended. The branch pipe 31 for electric wires with which 8 is drawn out is formed integrally.

Description

Ventilation Structure of LPG Fuel Tank for Vehicle

(Technology)

The present invention relates to a ventilation structure of a liquefied petroleum gas fuel tank for a vehicle, and more particularly, it is possible to safely discharge the leaked gas out of the vehicle, to pipe and wire various LPG pipes and wires, and to be easily affected by external impacts. The present invention relates to a ventilation structure applied to an LPG fuel tank for a vehicle that is not broken.

(Background)

Vehicles that use liquefied petroleum gas (LPG) as fuel are equipped with LPG fuel tanks, which vary depending on the type of vehicle but are usually mounted in the space within the trunk.

One of the caveats of LPG vehicle management is that the gas leaked out unexpectedly must be discharged out of the vehicle so that no fire or explosion can occur due to unvented residual gas.

For this reason, if the specific gravity is 1.5 ~ 2 times heavier than the air, LPG, which is installed on the floor, is normally discharged out of the vehicle, and gas vents are normally drilled at the bottom of the trunk, and the driver should be careful not to block the vents. .

However, in order to prevent dust from being introduced from the outside through the vents, the vents are not blocked by the cargo on the trunk or artificially.

Therefore, in recent LPG vehicles, a ventilation hose is connected between the bottom of the trunk and a valve container with valves that may cause gas leakage, thereby preventing leakage gas from remaining in the trunk.

However, until now, no suitable structure has been developed for use in ventilating the leaked gas of such LPG vehicles. In particular, when converted into an LPG fuel vehicle after being shipped as a gasoline vehicle, a corrugated drain pipe (hereinafter referred to as a corrugated pipe) is used. It is a situation that used to make a ventilation structure arbitrarily).

5 and 6 are schematic front and side views of an LPG fuel tank showing a ventilation structure applied to a conventional LPG vehicle.

As shown, the conventional LPG fuel tank 100, the steel plate is welded in a cylindrical shape and welded steel plate processed in a hemispherical shape on both sides to produce a tank body 110, a rectangular penetration through the tank body 110 A sphere is formed, and the valve container 120 is attached to this airtight structure.

The valve container 110 is an improvement that previously formed a valve mounting portion by drilling a plurality of holes in the upper hemispherical steel plate of the tank body 110, for controlling the entry and exit of the LPG to the tank body 110 A plurality of valves 121 (eg, opening / closing valves, emergency shutoff valves, filling valves, etc.) and a flow meter 122 for indicating the LPG filling amount of the tank main body 110 and the like are hermetically mounted.

Such a conventional valve container 120 is generally composed of a base mounted on the tank body 110, a case mounted on the base and a lid openable and closed, and both sides of the case may include an outlet 123 (eg, Diameter 30MM) is formed.

The ventilation structure 130 of the conventional LPG fuel tank 100, as shown in Figure 5 and 6, is composed of a first corrugated pipe 140 and the second corrugated pipe 150.

The first corrugated pipe 140 is inserted into one end 123A of one of the two outlets 123 to seal the outside by applying a sealing material such as silicon to the outside of the trunk 101 By inserting through the ventilation hole 102A formed through, the leaked gas which unexpectedly occurred in the valve container 120 is discharged | emitted out of a trunk.

The second corrugated pipe 150 is fitted with one end into the other outlet 123B, and is also sealed by applying silicone to the outside, and the other end is inserted into the ventilation hole 102B of the bottom surface 101 of the trunk. It was. The second corrugated pipe 150 is an LPG filling pipe 103 which is piped from the valve container 120 to the filling port and fills the LPG fuel tank in the LPG fuel tank, and an LPG supply pipe which is piped from the valve container 120 toward the engine to supply the LPG to the engine. 104, and wires 105 connecting the valve container 20 to the vehicle's electrical device (e.g., signal lines connecting the flow meter and the instrument of the vehicle, wires connected to the electronic valve, etc.) were piped and wired. At this time, the LPG filling pipe 103 and the LPG supply pipe 104 is piped to the outside of the trunk through the second corrugated pipe 150, the wires 105 are holes 151 at a predetermined position of the second corrugated pipe 150 And drilled through the hole 151 to be connected to the electric device through the inside of the trunk. After the wires 105 were drawn out, the hole 151 was sealed with silicon. Reference numeral 160 is a mounting structure.

The conventional ventilation structure 130 applied to the LPG vehicle as described above has the following problems.

First, since the conventional ventilation structure 130 is not developed for the leakage gas ventilation of the LPG vehicle, but is used by impregnating the sink hose, it is essentially inadequate as the ventilation structure of the LPG vehicle.

Second, the corrugated pipes 140 and 150, which are made of sink lakes, are weak in strength and are easily deformed or damaged when they are impacted from cargo loaded in the trunk.

Third, since the corrugated pipes 140 and 150 are respectively installed at both outlets 123 of the valve container 120, the ventilation structure is distracted, thereby making the trunk complicated.

Fourth, a large amount of silicon should be used for sealing the valve container 120 and the corrugated pipes 140 and 150, and nevertheless, the sealing is difficult due to the difference in shape between the outlet 123 and the corrugated pipes 140 and 150.

Fifth, since the LPG filling pipe 103 guided to the outside through the second corrugated pipe 150 should be piped back toward the filling hole, the pipe becomes cumbersome and long, and the LPG filling time is long due to the pressure loss caused by the longer pipe.

Sixth, there is an inconvenience to be perforated in the corrugated pipe 150 for the withdrawal of the wire 105 and the sealing of the perforated part is not easy.

An object of the present invention is to solve the problems of the conventional ventilation structure of the vehicle LPG fuel tank as described above, it is possible to safely discharge the leaked gas out of the vehicle, and to pipe the LPG pipe and the wire at the shortest distance And it can be wired, and to provide a ventilation structure of the fuel tank that is not easily damaged by an external impact.

1 is a schematic perspective view of a vehicle LPG fuel tank to which the ventilation structure of the present invention is applied;

2 is a schematic front view of a vehicle LPG fuel tank to which the ventilation structure of the present invention is applied;

3 is a schematic side view of a vehicle LPG fuel tank to which the ventilation structure of the present invention is applied;

4 is a schematic exploded perspective view of an exemplary valve container to which the ventilation structure of the present invention is applied;

5 and 6 are schematic front and side views of an LPG fuel tank showing a ventilation structure applied to a conventional LPG vehicle.

<Description of Symbols for Main Parts of Drawings>

1: ventilation structure of the present invention 2: LPG fuel tank 2A: tank body

3: valve container 3A: valve 3B: flow meter

3C: Base 3D: Mounting Holes 3E: Case

3F: Lid 4, 4A, 4B: Outlet 5: Cap

6: LPG filling tube 7: ventilator 8: wire

9: LPG supply pipe 10: ventilation pipe 20: first ventilation pipe

21: Branch pipe 21A for filling tube: Close end 22: Hose band

30: second ventilation pipe 31: branch pipe for electric wire 32: incision

33: engaging jaw 40: mounting portion 41: bridge

42: tank support 43: fixing band

According to the present invention, a vehicle LPG for discharging leakage gas from the valve container to the outside of the vehicle is installed a plurality of valves for controlling the access of the LPG to the LPG fuel tank of the vehicle and a flow meter indicating the LPG filling amount of the fuel tank Ventilation of the fuel tank is provided.

According to a feature of the present invention, both sides of the valve container is formed with a discharge port for ventilation, respectively, one of the discharge port is equipped with a ventilation pipe for discharging the leaking gas to the outside of the vehicle and the other is sealed with a cap.

The ventilation pipe is composed of a first ventilation pipe and a second ventilation pipe.

The first ventilation pipe is made of hard rubber of high strength so as not to be damaged by an external impact. One end of the first vent pipe is hermetically fitted to the outlet of the valve container and the other end is elongated to return to the side of the LPG fuel tank. In addition, the first vent pipe is integrally formed with a branch pipe for the filling pipe that the LPG filling pipe connecting between the valve container and the filling port is drawn out.

The second vent pipe is a flexible pipe that connects the other end of the first vent pipe with a vent formed through the vehicle to communicate with the outside, and wires connecting the valve container and the electric device of the vehicle The branch pipe for electric wires drawn out is formed integrally.

Hereinafter, the liquefied petroleum gas fuel tank for a vehicle according to the present invention with reference to the accompanying drawings in detail. The following embodiments are merely illustrative of the vehicle liquefied petroleum gas fuel tank according to the present invention is not intended to limit the scope of the present invention.

1 is a schematic perspective view of a vehicle LPG fuel tank to which the exemplary ventilation structure of the present invention is applied, FIG. 2 is a schematic front view of a vehicle LPG fuel tank to which the exemplary ventilation structure of the present invention is applied, and FIG. 3 is an exemplary ventilation of the present invention. 4 is a schematic exploded perspective view of an exemplary valve container to which an exemplary ventilation structure of the present invention is applied.

As shown in Fig. 1 to Fig. 3, in the tank body 2A of the LPG fuel tank 2 to which the ventilation structure 1 of the present invention is applied, a plurality of valves 3A for controlling the entry and exit of the LPG are provided. And a valve container 3 for attaching an on / off valve, an emergency shutoff valve, a filling valve, and the like, and a flow meter 3B for displaying the LPG filling amount.

Preferably, the tank body 2A of the LPG fuel tank 2 is integrally molded with a seamless aluminum alloy. The seamless aluminum alloy fuel tank 2A is formed by pressing an aluminum alloy disc prepared through a process such as aluminum casting, surface impurity removal, rolling, press punching, and annealing several times to form an open part on one side. An alloy cylindrical body is formed, for example, a rectangular through-hole 2B for mounting the valve container 3 on an approximately front side of the cylindrical body is formed, and the periphery of the opening is heated to an extrusion temperature. A series of processes in which a small diameter neck portion 2C is formed in the open portion by gradually pressing the circumference with a rotary roller, the neck portion 2C is cut to a suitable length, and a screw is formed to completely seal the plug 2D. It can be prepared by.

The valve container 3 is hermetically mounted to the fuel tank 2 thus manufactured. This valve container (3) has a number of valves (3A, e.g., shut-off valve, emergency shut-off valve, filling valve, etc.) and LPG filling amount of the fuel tank (2) for controlling the entry and exit of the LPG to the LPG fuel tank (2) It is a container for mounting the flow meter 3B etc. which display this.

The valve container 3 to which the ventilation structure 1 of the present invention is applied is hermetically welded to the through hole 2B formed in the tank body 2A, as shown in FIG. 4, and the valve 3A and the flow meter are A base 3C having a plurality of mounting holes 3D for mounting 3B, a case 3E hermetically coupled to the base 3C, and having a valve 3A and a flow meter 3B housed therein; It can be configured to include an openable lid (3F) for hermetically covering the case (3E).

The valve container 3, preferably the case 3F, has one outlet port 4 (about 46 mm inner diameter) protrudingly formed on each side thereof, and one of the two outlet ports 4 is provided with the ventilation pipe 10. The other one is hermetically sealed with a cap 5 (e.g. a rubber cap).

The reason for forming two outlets (4) is to enable the left and right to select the direction in which the ventilation pipe 10 is connected to suit the various structures of the vehicle. Reference numeral 3G denotes a gasket for confidentiality.

According to the structure of the valve container 3 as described above, even if some LPG leaks from the valve 3A or the like, the leaked gas does not leak out of the valve container 3 and is discharged through the outlet port 4 and the ventilation pipe 10. It will lead to the outside of the vehicle. In addition, since the rigid valve container 3 firmly protects the valve 3A and the flow meter 3B, there is no fear of damage due to external impact.

The vent tube 10 is connected to one of the two outlets 4 of the valve container 3. The ventilation pipe 10 discharges the leaking gas which may exist in the valve container 3 to the outside of the vehicle, and supplies LPG to the LPG filling pipe 6 and the engine, which are piped between the valve container 3 and the filling port. It provides a passage through which the LPG supply pipe 9 and the wires connecting the valve container 3 and the vehicle's electric device (eg, a signal line connecting the flow meter and the instrument of the vehicle) are piped and wired.

The ventilation pipe 10 is composed of a first ventilation pipe 20 and the second ventilation pipe (30).

The first ventilation pipe 20 is formed of, for example, high-strength hard rubber so as not to be damaged and deformed by an impact from the outside (for example, a cargo carried in the trunk). For example, the inner diameter of about 50MM is fitted around the outlet 4 to be hermetically sealed with, for example, a hose band 22, etc., and the lower end thereof is elongated toward the side of the tank body 2A, which is not easily contacted from the outside. have.

The first ventilating pipe 20 has a branch pipe for the filling pipe which causes the LPG filling pipe 6 piped from the valve container 3 through the first ventilation pipe 20 to exit from the first ventilation pipe 20 (to be withdrawn) ( 21) is integrally formed, and the drawn pipe branch pipe 21 is piped toward the filling hole. This filling tube branch pipe 21 is branched at a position near the opposite end (lower end) of the end connected to the outlet 4 to minimize the degree of exposing the filling pipe branch pipe 21 to the outside.

It is preferable to form an adhesive terminal 21A made of soft rubber at the end of the branch pipe 21 for the filling tube so as to be elastically in close contact with the inserted LPG filling tube 6 to maintain its airtightness. In addition, the upper end of the first ventilation pipe 20, that is, the connection end of the outlet 4, so that the length of the first ventilation pipe 20 can be cut and adjusted according to the environment of the vehicle (trunk) on which the ventilation pipe 10 is mounted. It is desirable to leave enough space.

The second ventilation pipe 30 is a pipe that guides the leakage gas passing through the first ventilation pipe 20 to the outside of the vehicle, the upper end of which is connected to the lower end of the first ventilation pipe 20 by a hose band 22 or the like, It is connected to the ventilation hole 7 formed in the bottom surface (TF) of the vehicle. In addition, the second ventilation pipe 30 is formed of a flexible pipe to guide the ventilation pipe 10 to the ventilation hole 7 freely.

In the second ventilating pipe 30, the electric wire powder for allowing the electric wires 8 introduced from the valve container 3 to the second ventilating pipe 30 through the first ventilating pipe 20 to exit from the second ventilating pipe 30. The branch pipe 31 is integrally formed. The wires 8 drawn out from the second ventilation pipe 30 are wired toward the corresponding electric device.

The branch pipe 31 for electric wires is preferably formed integrally in close proximity to the connection end with the first ventilation pipe 20. In addition, the cutout portion 32 may be formed to extend from the connecting end of the first ventilation pipe 20 of the second ventilation pipe 30 to the branch pipe 31 for electric wire. The electric wires 8 can be hermetically wired by inserting the electric wires into the branch pipe 31 for electric wires through the incisions 32 and then sealing the incisions 32. At the lower end of the second ventilation pipe 30, it is preferable to form an annular locking projection 33 for mounting in the ventilation hole (7).

The LPG supply pipe 9 is guided out of the vehicle through the first ventilation pipe 20, the second ring engine 30, and the ventilation hole 7 to be piped toward the engine. Reference numeral 40 is a mounting portion for mounting the LPG fuel tank 2 to which the present invention is applied, which is composed of a bridge 41, a tank support 42, and a fixed band 43.

Ventilation structure (1) of the vehicle LPG fuel tank according to the present invention described above has the following effects.

First, to select the left or right side of the fuel tank (2), that is, the valve container (3) according to the structure of the vehicle to install the ventilation pipe 10 only on one side, the pipe length of the ventilation pipe 10, LPG filling pipe ( 6), the length of the wires 8, the length of the wires 8 and the length of the pipe of the LPG supply pipe (9) can be configured in a well-structured ventilation structure (1), and as shown in the prior art You don't have to drill two vents, just one.

Second, since the first ventilation pipe 20 made of high-strength hard rubber is piped in a part that may be impacted from the outside of the ventilation pipe 10, there is no fear of gas leakage due to deformation or damage, and to protect the ventilation pipe 10. There is no need to install a cover for the.

Third, the connection portion of the outlet port 4 of the valve container 3 and the first ventilation pipe 20, the connection portion of the first ventilation pipe 20 and the second ventilation pipe 30, and the second ventilation pipe 30 and the ventilation hole The connection part of (7) has a structure in which sealing is easy, and the branch pipe for the filling pipe which is integrally formed in the ventilation pipe 10 in drawing out the LPG filling pipe 6 and the electric wires 8 from the ventilation pipe 10 ( 21) and the branch pipes 31 for electric wires, it is very easy to install, wire, piping and sealing the entire fuel tank (2).

In particular, according to the structure of the branch pipe 21 and the electric wire branch pipe 31 integrally formed in the first ventilation pipe 20 and the second ventilation pipe 30, the conventional branch pipe for the filling pipe ( 21) and the problem of sealing due to withdrawing the branch pipe 31 for the wire is solved.

Fourth, the length of the ventilation pipe 10 can be appropriately adjusted according to the structure of the vehicle by providing a space having a sufficient length at the upper end of the first ventilation pipe 20.

As a result, according to the ventilation structure (1) of the vehicle LPG fuel tank according to the present invention, especially when converted to the LPG fuel vehicle after being shipped as a gasoline vehicle, the ventilation structure that meets the installation criteria of the LPG fuel tank is very easy It can be easily constructed and used safely without worrying about gas leakage.

Claims (2)

From the valve container 3, in which a plurality of valves 3A for controlling the entry and exit of the LPG to the LPG fuel tank 2 of the vehicle and a flowmeter 3B indicating the LPG filling amount of the fuel tank 2 are installed. In the ventilation structure (1) of the vehicle LPG fuel tank for discharging the leaking gas to the outside of the vehicle, Discharge ports 4 for ventilation are formed on both sides of the valve container 3, and one of the discharge ports 4 is equipped with a ventilation pipe 10 for discharging leakage gas to the outside of the vehicle, and the other one is a cap. Sealed with (5); The ventilation tube 10 is: It is connected to the outlet 4, made of high strength hard rubber, extending from the valve container 3 to the side of the fuel tank 2, the LPG filling pipe 6 from the valve container 3 The first ventilation pipe 20 is formed integrally with the branch pipe for filling pipe 21 is drawn out); And a connection between the first ring engine 20 and the ventilation hole 7 formed on the bottom surface of the vehicle, formed of a flexible tube and elongated, and the wire 8 from the valve container 3 is extended. And a second ventilation pipe (30) integrally formed with a branch pipe (31) for wires drawn out to the outside. 2. The valve container (3) according to claim 1, wherein the valve container (3) is hermetically welded to a through hole (2B) formed in the fuel tank (2), and a plurality of mounting holes for mounting the valve (3A) and the flow meter (3B). A base 3C having a 3D formed thereon, a case 3E hermetically coupled to the base 3C, in which the valve 3A and the flow meter 3B are housed, and an airtight covering of the case 3E. And a lid (3F) that can be opened and closed, wherein the outlet (4) protrudes on both sides of the case (3E).