KR101987459B1 - Receptacle for fuel cell electric vehicle - Google Patents

Abstract

The present invention relates to a receptacle for a hydrogen fuel battery vehicle. The receptacle includes: first and second bodies combined with each other and combined with a charging nozzle for fuel supply to charge fuel; a filter part installed in the first body and removing foreign substances by filtering the charged fuel; and a valve part installed in the second body and preventing the backflow of the charged fuel. Between the first part and the valve part, a sealing member for sealing a gap between the lower part of the first body and the upper part of the second body; and first and second sheets for sealing a gap between a cylindrical member placed in valve part and the sealing member and a valve body installed in the cylindrical member to be elevatable to open or close a flow path to charge fuel; are installed. The first and second sheets are formed into ring shapes having different diameters, and in order to enable charging pressure for fuel to respond to preset low and high pressure sections, the sheets are made of different materials to form composition having different levels of strength, and thus, two sheets having different levels of strength are placed in the upper part of a check valve to prevent fuel from leaking.

Description

Hydrogen Fuel Cell Vehicle Receptacle {RECEPTACLE FOR FUEL CELL ELECTRIC VEHICLE}

The present invention relates to a hydrogen fuel cell vehicle receptacle, and more particularly, to a hydrogen fuel cell vehicle receptacle for filtering fuel and supplying the fuel to a fuel tank during fuel charging in a hydrogen fuel cell vehicle.

In general, a hydrogen cell electric vehicle (FCEV) generates electricity electrochemically by using oxygen and hydrogen in a stack to convert chemical energy of a fuel directly into electrical energy and use it as a power source.

Such a hydrogen fuel cell vehicle can continue to generate power regardless of the capacity of the battery by supplying fuel and air from the outside, and is an ideal technology that is highly efficient and emits little pollutants.

The hydrogen fuel cell vehicle supplies hydrogen fuel to the stack via a high pressure regulator and a low pressure regulator in a fuel tank, and the hydrogen blower includes a pump and various valves connected to the low pressure regulator.

In addition, the hydrogen fuel cell vehicle includes a rapid thawing water tank, a whole animal pump, a thermostat, a stack cooling radiator, an air conditioner condenser, an electric refrigerant compressor, a water tank, a humidifier, a driving motor, various controllers, an air blower, and an air filter. It includes more.

The fuel supply system of the hydrogen fuel cell vehicle corresponds to the engine of a normal gasoline and diesel vehicle, and is located in the upper side of the front side of the vehicle.

For example, the present applicant has disclosed and applied for a patent application of a fuel supply system and a regulator of a hydrogen fuel cell vehicle and a control technology thereof in many of Patent Documents 1 to 4 described below.

As described above, the hydrogen fuel cell vehicle handles high pressure hydrogen of about 350 to 700 bar, and is thus equipped with one or more hydrogen tanks that withstand high pressure hydrogen gas pressure.

The hydrogen gas filling system for the hydrogen tank measures the pressure through a pressure sensor included in the buffer tank of the hydrogen gas filling station and the hydrogen tank of the hydrogen fuel cell vehicle, and the filling is completed when the measured pressure reaches the target pressure. When filling the hydrogen gas, a hydrogen filling receptacle is used as a connector that connects the buffer tank and the hydrogen tank to each other.

Receptacles are used only once during charging, but airtightness and noise during charging are classified as very important quality features.

The airtight section has a cylindrical O-ring seal structure to prevent leakage of gas from the filling nozzle and the receptacle housing, including O-ring material and dimensions, is manufactured based on SAE J2600 specifications.

Republic of Korea Patent Registration No. 10-1134645 (announced April 9, 2012) Republic of Korea Patent Registration No. 10-1134647 (announced April 19, 2012) Republic of Korea Patent Registration No. 10-0946204 (announced 8 March 2010) Republic of Korea Patent Registration No. 10-1072361 (August 12, 2011)

For example, Figure 1 is a block diagram of a check valve applied to a receptacle according to the prior art.

As shown in FIG. 1, a receptacle according to the prior art is applied with a check valve 1 to prevent leakage of fuel to be charged.

The check valve 1 is a cylindrical member 2 installed inside the lower body of the receptacle, a valve body 3 and a cylindrical member installed to be liftable inside the cylindrical member 2 to open and close a flow path filled with fuel. 2) It includes a spring (4) installed inside and providing an elastic force to the valve body (3).

Here, one sheet 5 made of a polyamide-imide material for sealing the leak of fuel to be filled is installed at the upper end of the cylindrical member 2.

However, there is a limit to sealing hydrogen charged at a high pressure with one sheet 5.

Therefore, the check valve applied to the receptacle according to the related art does not completely seal the external leak of the fuel charged by using one seat, and there is a problem in that the fuel passing through the seat is leaked to the outside.

An object of the present invention is to solve the above problems, to provide a hydrogen fuel cell vehicle receptacle that can prevent the leakage of the fuel to be charged.

Another object of the present invention is to provide a hydrogen fuel cell vehicle receptacle that can improve the sealing performance in the low to high pressure section of the fuel by applying two seats made of different materials to the check valve.

In order to achieve the object as described above, the hydrogen fuel cell vehicle receptacle according to the present invention is coupled to each other and the charging nozzle for supplying fuel to the first body and the second body to charge the fuel, the interior of the first body And a filter unit for filtering foreign substances and filtering the fuel to be installed therein, and a valve unit for preventing a backflow of the fuel installed and charged in the second body, and between the filter unit and the valve unit. Sealing between the sealing member for sealing between the lower end and the upper end of the second body, and the cylindrical member provided in the sealing member and the valve portion and the valve member for opening and closing the flow path filled with fuel is provided so as to be liftable inside the cylindrical member. First and second seats are installed, the first and second seats are each formed in a ring shape having a different diameter, the filling pressure of the fuel is Li is set to be from a low pressure corresponding to the high pressure zone, is produced by using a different material for the material is characterized by having a different intensity.

As described above, according to the hydrogen fuel cell vehicle receptacle according to the present invention, the effect of preventing the leakage of fuel can be obtained by applying two seats having different strengths to the upper end of the check valve.

That is, according to the present invention, even if the leakage of fuel occurs in the seat with low strength, the leakage of fuel is prevented in the seat with high strength, so that the airtight performance can be improved as compared with the case where one sheet is conventionally applied. Effect is obtained.

Further, according to the present invention, by applying two sheets having different strengths, the effect that the sealing performance can be improved in the low to high pressure section of the fuel filling pressure.

1 is a block diagram of a check valve applied to a receptacle according to the prior art,
2 is a perspective view of a hydrogen fuel cell vehicle receptacle according to a preferred embodiment of the present invention;
3 is an exploded perspective view of the hydrogen fuel cell vehicle receptacle shown in FIG. 2;
4 is a cross-sectional view taken along line AA ′ of FIG. 2;

Hereinafter, a hydrogen fuel cell vehicle receptacle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view of a hydrogen fuel cell vehicle receptacle according to a preferred embodiment of the present invention, FIG. 3 is an exploded perspective view of the hydrogen fuel cell vehicle receptacle shown in FIG. 2, and FIG. 4 is a AA ′ shown in FIG. 2. Sectional view of the line.

Hereinafter, terms indicating directions such as 'left', 'right', 'front', 'backward', 'upward' and 'downward' are defined as indicating respective directions based on the states shown in each drawing. do.

In the present embodiment, a hydrogen fuel cell vehicle receptacle will be described.

However, it should be noted that the present invention is not necessarily limited to this, and may be modified to be applied to various gas vehicles for filling high-pressure gas fuel.

As shown in FIGS. 2 to 4, the hydrogen fuel cell vehicle receptacle 10 according to the preferred embodiment of the present invention is coupled with a charging nozzle (not shown) that is coupled to each other and supplies fuel to charge fuel. It is installed inside the first body 20 and the second body 30, the filter unit 40 and the second body 30 to remove the foreign substances by filtering the fuel is installed in the interior of the first body 20 and It may include a valve unit 50 to prevent the back flow of the fuel to be filled.

In addition, the hydrogen fuel cell vehicle receptacle 10 according to the preferred embodiment of the present invention may further include a fuel cap 60 coupled to the inlet side of the first body 10.

The first body 20 may be formed in a substantially cylindrical shape having an upper surface and a lower surface opened, and a moving passage 21 through which fuel to be filled may be formed in the first body 20.

Here, the filling nozzle is coupled to the portion opened on the upper surface of the first body 20 to form the inlet 201 through which the fuel is introduced, and the fuel cap 60 is coupled to the outer circumferential surface of the upper end of the first body 20. Can be.

The fuel cap 60 protects the upper end of the first body 20 into which fuel is introduced, and prevents foreign substances such as moisture, oil, dust, and the like from being introduced into the first body 20.

The fuel cap 20 is formed in a cylindrical shape with a lower surface opened, and may be connected by using a vehicle body (not shown) and a tether 61 to prevent loss during charging.

On the inner circumferential surface of the inlet 201 formed at the upper end of the first body 20, the first ring 22 and the second ring 23 to prevent fuel leakage when the filling nozzle is coupled may be spaced apart by a predetermined interval.

Here, the first ring 22 serves to seal the first filling nozzle filling the fuel at a pressure of about 5 bar to 100 bar, that is, a low pressure, and the second ring 23 has a pressure of about 100 bar to 700 bar, that is, a high pressure. To seal the second filling nozzle for filling the fuel.

To this end, a stepped portion 24 may be formed on the inner circumferential surface of the upper end of the first body 20 so as to correspond to the diameter of the second filling nozzle which is smaller than the diameter of the first filling nozzle.

In addition, a first installation groove 221 in which the first ring 22 is installed is formed in an upper portion of the stepped portion 24, and a second installation groove in which a second ring 23 is installed in a lower portion of the stepped portion 24. 231 may be formed.

Meanwhile, first and second backup rings 25 and 26 may be installed at the upper and lower portions of the second ring 23 in the second installation groove 231, respectively.

The first and second backup rings 25 and 26 each have a function of minimizing the movement and deformation of the second ring 23 being pushed up or down by the filling pressure of the fuel when the high pressure fuel is charged at about 100 bar to 700 bar, respectively. do.

Each of the first and second backup rings 25 and 26 may have a rectangular cross section.

The first and second backup rings 25 and 26 respectively contact the second ring 23, that is, the bottom surface of the first backup ring 25 and the top surface of the second backup ring 26 are respectively a second surface. It may be formed into a curved surface concave upward or downward to be in close contact with the ring 23.

Here, the first and second backup rings 25 and 26 may be made of a synthetic resin material having excellent low temperature airtightness, tensile strength and elongation, such as thermoplastic polyurethane (TPU).

As described above, the present invention can minimize the vertical movement and deformation of the second ring due to the filling pressure by installing a backup ring at the upper and lower portions of the second ring sealing the filling nozzle when charging the high pressure fuel. have.

In addition, the present invention forms a contact surface of each backup ring in contact with the second ring into a concave curved surface, thereby allowing the second ring and the backup ring to be in close contact and completely sealed.

Accordingly, the present invention can completely block fuel leakage during fuel filling, improve airtight performance, and prevent safety accidents caused by fuel leakage in advance.

The second body 30 is formed in a substantially rectangular parallelepiped shape in which an upper surface and a lower surface are opened, and an upper end portion of the second body 30 is formed to have a smaller diameter than a diameter of the lower end portion of the first body 20 so that the first body 20 is formed. ) Is inserted into the lower end of the coupling.

An installation space 31 in which the valve unit 50 is installed is formed in the second body 30, and a fuel supplied by the opening operation of the valve unit 50 is provided at the lower end of the second body 30. A supply passage 32 for supplying the fuel tank may be formed.

An O-ring may be installed at a lower end of the second body 30 to seal a portion coupled with the fuel tank.

The filter unit 40 includes a sintered filter 41 for filtering fuel to be manufactured and filled in a cylindrical shape by overlapping a plurality of wire meshes having different pore diameters, a protector 42 installed in the sintered filter 41, and sintered. It may include a cap 43 is coupled to the top of the filter 41 and the protector 42.

A sealing member that functions as a boss may be installed at the lower portion of the sintering filter 41 and the protector 42 of the valve unit 40.

For example, the sintered filter 41 overlaps one main mesh having a pore size of about 10 μm, two protective meshes having a pore size of about 0.1 to 10 mm and a thickness of about 1 to 2 mm, about 1000 to 1200 ° C. Compression sintering at a high temperature of may be provided as a single sintered mesh filter having a uniform pore size of about 10㎛ and a thickness of about 1.3mm.

As described above, the sintered filter 41 manufactured by compressing and sintering a plurality of wire mesh meshes at high temperature has excellent porosity and filtration efficiency, has heat resistance and corrosion resistance, and has excellent strength and durability.

Of course, the present invention can be modified to apply a sintered powder filter that is easy, simple and inexpensive to manufacture instead of the sintered mesh filter.

However, the sintered powder filter is difficult to make the desired pore uniformity due to the chemical bonding between the powders in the manufacturing process mechanism, and the powders are agglomerated, so that some of the agglomerated powders fall off due to the filling pressure of the fuel during use. have.

On the other hand, the sintered mesh filter is not broken or broken due to its characteristics, and can maintain the overall rigidity even when partial deformation occurs.

Therefore, according to the present invention, by applying a sintered mesh filter manufactured by compression sintering at a high temperature by overlapping a plurality of wire meshes manufactured with different preset pore sizes, the pore size dispersion is small and the stiffness of the filter according to the fuel filling environment can be satisfied. .

And it should be noted that the present invention can vary the number of meshes, the pore size and thickness of each mesh according to the characteristics of the fuel to be charged, the pressure.

The protector 42 is installed inside the sintering filter 41 to prevent deformation of the sintering filter 41 under high pressure conditions.

The protector 42 may be manufactured to have a thickness of about 1 mm, and may be manufactured to have a pore diameter of about 5 mm so that fuel filtered by the sinter filter 41 may be smoothly supplied to the valve unit 50.

Here, the sintered filter 41 may be manufactured by molding a rectangular plate into a cylindrical shape and then joining both ends by a welding method such as laser welding.

The cap 43 functions as a stopper to move the fuel supplied through the moving passage 21 of the first body 20 while being filtered from the outside of the sintering filter 41 to the inside.

To this end, the cap 43 is formed in a solid shape in which the central portion is convex upward and inclined downward toward the outside in order to minimize fluid resistance when the fuel moves, and the protector 42 is disposed on the lower surface of the cap 43. An insertion portion inserted into the interior of the protrusion may be formed.

Of course, the shape of the cap 43 is not necessarily limited thereto, and the shape of the cap 43 may be changed into various shapes such as a hemispherical shape convex upward or a semi-elliptic cross section.

As described above, the present invention applies a sintered filter which is pressed and sintered at a high temperature by overlapping a plurality of wire meshes, and combines the cap and the boss with the upper and lower portions of the sintered filter, respectively, so that the edge part is broken by the pressure alternating during fuel filling. Fragment can be prevented.

Accordingly, the present invention can completely block the inflow of foreign matter into the receptacle, thereby preventing the defects of each component due to the foreign matter.

On the other hand, each part of the filter unit 40 is all made of a stainless material, such as SUS316L, in order to cope with hydrogen embrittlement, it can be manufactured by adjusting the nickel (Ni) content to about 7 to 15% depending on the application have.

Next, with reference to FIG. 4 and FIG. 5, the structure of a valve part is demonstrated in detail.

5 is an enlarged cross-sectional view of the valve unit.

As shown in FIG. 4, the valve part 50 is installed in the cylindrical member 51 and the cylindrical member 51 installed in the installation space 31 of the second body 30 so as to be lifted and lowered in fuel. It may include a valve body 52 for opening and closing the flow path to be filled and a spring 53 which is provided inside the cylindrical member 51 to provide an elastic force to the valve body (52).

The cylindrical member 51 may be formed in a substantially cylindrical shape having an upper surface opened, and may have a smaller outer diameter than the inner diameter of the installation space 31. In addition, a plurality of discharge holes 54 for discharging the fuel introduced into the cylindrical member 51 to the outside may be formed at the side surface of the cylindrical member 31.

Therefore, the fuel supplied into the cylindrical member 51 during the opening operation of the valve body 52 is discharged to the outside of the cylindrical member 51 through the discharge hole 54, the installation space 31 of the second body 30 ) Is supplied to the supply passage 32 formed in the lower portion of the second body 30.

The valve body 52 normally moves up by the elastic force of the spring 53 to close the flow path, and when the pressure transmitted through the flow path increases, the valve body 52 moves downward while elastically deforming so that the length of the spring 53 decreases. Open.

To this end, the upper surface of the valve body 52 may be formed into a convex upward surface so as to be able to close the filling passage 83 of the first and second seats 81 and 82 to be described below.

As described above, according to the present invention, by applying a closed structure to the upper end of the cylindrical member of the valve portion, the excess flow rate of the supplied fuel is dispersed and the pipe width is increased to reduce the flow rate, and the protrusion formed at the lower end of the valve body is conventionally formed. This can reduce turbulent kinetic energy.

Accordingly, the present invention can effectively reduce the charging noise due to turbulent kinetic energy and airflow sound in the process of filling the fuel using the receptacle.

According to the test result, it can be seen that as the filling amount of the fuel increases and the applied pressure increases, the flow velocity in the receptacle 10 decreases and the turbulent kinetic energy greatly decreases.

Therefore, the present invention can reduce the filling noise by dispersing the excess flow of fuel and reducing the flow velocity in the receptacle to minimize turbulent kinetic energy and airflow sound.

On the other hand, between the filter unit 40 and the valve unit 50, the sealing member 70 and the sealing member 70 and the sealing member 70 for sealing between the lower end of the first body 20 and the upper end of the second body 30 First and second seats 81 and 82 for sealing between the cylindrical member 51 of the 50 and the valve body 52 may be provided.

The sealing member 70 is formed in a substantially cylindrical shape having a delivery passage 71 filled with fuel in the center thereof, and the sealing member 70 includes a lower end of the space inside the first body 20 and a second body 30. The flange portion 72 coupled between the upper ends may extend along the outer circumferential surface.

The first seat 81 and the second seat 82 are respectively disposed on the upper end of the cylindrical member 51 and serve to seal between the sealing member 70, the cylindrical member 51, and the valve body 52.

As the filling passages 83 filled with fuel are formed in the centers of the first and second sheets 81 and 82, the first and second sheets 81 and 82 have ring shapes having different diameters, respectively. Can be formed.

Here, the filling flow path 83 may be closed by the convex upper end of the valve body 52 during the raising operation of the valve body 52.

For example, the first sheet 81 may be disposed above the second sheet 82, and an insertion space 84 into which the second sheet 82 may be inserted may be formed on the bottom surface of the first sheet 81. have.

Accordingly, the first seat 81 is fixed by the lower surface of the sealing member 70 and the upper surface of the cylindrical member 51 of the valve portion 50, respectively, and the second seat 82 is the lower surface of the first seat 81. It can be inserted into the insertion space 84 formed in the fixed.

Here, the valve body 52 may be made of a synthetic resin material such as hard plastic so that the predetermined strength or more is rigid.

The first and second sheets 81 and 82 may be manufactured using materials of different materials, respectively.

For example, the first sheet 81 may be made of a stainless material such as SUS316L in order to cope with hydrogen embrittlement, and may be manufactured by adjusting the nickel (Ni) content to about 7 to 15% depending on the purpose. .

The second sheet 82 may be made of a synthetic resin material such as soft plastic to have flexibility.

That is, the second seat 82 has a lower strength than the valve body 52 and the first seat 81 to seal when filling the low pressure fuel, and the first seat 81 is attached to the second seat 82. Compared to the high-pressure fuel charging, the strength is high.

As described above, the present invention can prevent fuel leakage by applying two seats having different strengths to the check valve.

That is, according to the present invention, even if fuel leakage occurs in a sheet of low strength, the leakage of fuel in the sheet of high strength can be prevented, so that the airtight performance can be improved as compared with the case where one sheet is conventionally applied.

In addition, according to the present invention, two sheets having different strengths may be used to improve sealing performance in a low to high pressure section of the fuel filling pressure.

Next, a coupling relationship and an operation method of a hydrogen fuel cell vehicle receptacle according to a preferred embodiment of the present invention will be described in detail.

First, the operator moves the filter portion 40 upward from the lower portion of the first body 20 to be inserted into the interior space, and couples the sealing member 70 to the lower end of the first body 20.

At this time, the first ring 22 is installed in the first installation groove 221 formed on the inner circumferential surface of the upper end of the first body 20, and the first backup ring 25 and the second installation groove 231 are installed in the second installation groove 231. The ring 23 and the second backup ring 26 are installed.

Subsequently, the operator sequentially inserts the cylindrical member 51, the spring 53, and the valve body 52 into the installation space 31 inside the second body 30 to install the valve portion 50.

Finally, the second body 30 provided with the valve unit 50 is disposed below the first body 20, and the first and second bodies 20 and 30 are coupled to each other.

At this time, the first and second sheets 81 and 82 are installed between the cylindrical member 51 and the sealing member 70.

The fuel cap 60 is coupled to the upper end of the assembled receptacle 10, and the lower end of the receptacle 10 is connected to the fuel tank.

Meanwhile, the worker separates the fuel cap 60 coupled to the first body 20 of the receptacle 10 when filling the fuel, and couples the filling nozzle to the inlet formed at the upper end of the first body 20 to fill the fuel. .

Here, the first ring 22 installed on the inner circumferential surface of the upper end of the first body 20 seals the first filling nozzle filling the fuel at a low pressure and a pressure of about 5 bar to 100 bar.

The second ring 23 seals the second filling nozzle filling the fuel at a pressure of about 100 bar to 700 bar, that is, a high pressure.

The first and second backup rings 25 and 26 installed on the upper and lower portions of the second ring 23, respectively, are charged upward of the second ring 23 when the high pressure fuel is charged at about 700 bar. Minimizes downward movement and deformation.

In this case, the surfaces of the first and second backup rings 25 and 26 that contact the second ring 23, that is, the lower surface of the first backup ring 25 and the upper surface of the second backup ring 26 are respectively formed. The second ring 23 is in close contact with the first or second backup rings 25 and 26 as formed in a curved concave upward or downward to be in close contact with the second ring 23.

As described above, the present invention can minimize the movement and deformation of the second ring due to the filling pressure by installing backup rings at upper and lower portions of the second ring sealing the filling nozzle when filling the high pressure fuel.

The filter unit 40 filters the fuel supplied through the moving passage 21 of the first body 20 while moving inside thereof.

At this time, the fuel is lowered through the moving passage 21 of the first body 20 to move to the side of the filter unit 40, filtered while passing through the sintering filter 41 and the protector 42, the boss ( 44 is supplied to the delivery channel 71 of the sealing member 70 and the filling channel 83 of the first and second sheets 81 and 82 through the delivery channel 45 formed at 44.

Then, the valve body 52 moves downward while elastically deforming so that the length of the spring 53 decreases as the pressure of the fuel supplied through the transmission flow path 71 rises, and the filling flow path 83 is opened.

Accordingly, the fuel is transferred into the cylindrical member 51 through the open filling passage 83, and again to the outside of the cylindrical member 51 through the plurality of discharge holes 54 formed on the side surface of the cylindrical member 51. Discharged.

Subsequently, the fuel moves downward along the installation space 31 of the second body 30 to be filled in the fuel tank through the supply passage 32.

At this time, when the pressure of the charged fuel rises, the valve body 52 moves up by the pressure of the fuel to close the filling flow path 83 to prevent leakage of the charged fuel.

Here, the second sheet 82 made of a synthetic resin material such as soft plastic having a lower strength than the first sheet 81 made of a stainless material such as SUS316L may be charged with a low pressure fuel of about 5 baar to 100 bar. Seal to prevent fuel leakage.

The first sheet 81 has a higher strength than the second sheet 82 and seals to prevent leakage of fuel during high-pressure fuel charging of about 100 bar to 700 bar.

As described above, the present invention can prevent fuel leakage by applying two seats having different strengths to the check valve.

That is, according to the present invention, even if fuel leakage occurs in a sheet of low strength, the leakage of fuel in the sheet of high strength can be prevented, so that the airtight performance can be improved as compared with the case where one sheet is conventionally applied.

In addition, according to the present invention, two sheets having different strengths may be used to improve sealing performance in a low to high pressure section of the fuel filling pressure.

When the filling of the fuel is completed, the fuel cap 60 is coupled to the upper end of the first body 20 to prevent damage to the inlet 201.

Through the above process, the present invention can prevent the leakage of fuel by applying two seats having different strengths to the check valve.

As mentioned above, although the invention made by the present inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

In the above embodiment, the hydrogen fuel cell vehicle receptacle has been described. However, the present invention is not limited thereto, and the present invention may be modified to be applied to various gas vehicles for filling high-pressure gas fuel.

The present invention is applied to a hydrogen fuel cell vehicle receptacle technology for preventing the leakage of fuel passing through the seat applied to the top of the check valve in the process of filling the fuel.

10: Hydrogen Fuel Cell Vehicle Receptacles
20: first body 201: inlet
21: flow path 22,23: first and second ring
221,231: 1st, 2nd installation groove
24: stepped portion 25, 26: first and second backup ring
30: second body 31: installation space
32: supply passage 40: filter unit
41: Sintered filter 42: Protector
43: cap
50: valve portion 51: cylindrical member
52: valve body 53: spring
54: discharge hole 60: fuel cap
61: tether 70: sealing member
71: delivery passage 72: flange
81,82: 1st, 2nd sheet 83: Filling path
84: insertion space

Claims (3)

A first body and a second body coupled to each other and coupled to a filling nozzle for supplying fuel,
Filter unit for removing the foreign matter by filtering the fuel is installed and filled in the inside of the first body;
A valve unit installed in the second body to prevent a backflow of fuel charged therein;
Between the filter portion and the valve portion sealing member for sealing between the lower end of the first body and the upper end of the second body and
First and second seats are installed between the sealing member and the cylindrical member provided in the valve unit and the valve body which is installed to be liftable in the cylindrical member to open and close a flow path filled with fuel,
The first and second sheets are each formed in a ring shape having different diameters, and are manufactured by using materials of different materials to have different strengths so that the filling pressure of the fuel corresponds to a predetermined low to high pressure section. A hydrogen fuel cell vehicle receptacle, characterized in that. The method of claim 1,
The valve body is made of a hard synthetic resin material so as to have rigidity over a predetermined strength,
The first sheet is made of a stainless material,
And the second seat is made of a soft synthetic resin material so as to have a lower strength than the valve body and the first seat. The method of claim 2,
The first sheet is disposed on top of the second sheet,
An insertion space into which the second sheet is inserted is formed on a lower surface of the first sheet,
The first sheet is fixed by the lower surface of the sealing member and the upper surface of the cylindrical member, respectively
The second sheet is a hydrogen fuel cell vehicle receptacle, characterized in that the insertion is fixed to the insertion space formed on the lower surface of the first sheet.

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