WO2014058103A1

WO2014058103A1 - Receptacle in gas filling system for compressed natural gas automobiles

Info

Publication number: WO2014058103A1
Application number: PCT/KR2012/010829
Authority: WO
Inventors: 김동조; 장재황; 박종배; 이현철
Original assignee: 동방테크 주식회사
Priority date: 2012-10-12
Filing date: 2012-12-13
Publication date: 2014-04-17

Abstract

The present invention comprises: a head case having a stepped part formed on the inner circumferential surface thereof; and an adapter comprising a protruding part which has a through-hole formed therein, through which a valve passes, and is in the shape of a cylinder, a supporting part in the shape of a bowl and formed on the outer circumferential surface of the protruding part so as to support a valve spring, and a contact part which is in the shape of a ring and formed on the outer circumferential surface of the supporting part, and which has the front surface thereof in contact with a stepped surface of the stepped part and the rear surface thereof in contact with a body case. Accordingly, the present invention compresses the contact part of the adapter when the body case is coupled to the head case, thereby preventing the adapter from rotating and thus securely coupling the adapter to the coupling groove of the body case, and therefore can prevent the movement of the adapter during high-pressure gas injection. In other words, the present invention fundamentally prevents damage to components, such as a valve and a spring, caused by the movement of an adapter and thus can relatively improve the durability of a receptacle.

Description

Receptacle for Compressed Natural Gas Vehicle Gas Filling System

The present invention relates to a receptacle of a gas filling system for compressed natural gas vehicles, and more particularly, to a receptacle of a gas filling system for compressed natural gas vehicles which is coupled to a dispensing nozzle and is not rotated when gas is injected from the outside.

In recent years, development of alternative energy for petroleum energy has been actively conducted in various fields, which is prepared for the depletion of finite petroleum resources and actively coping with increasing environmental pollution around the world. One.

In addition, in the case of automobiles, development of alternative energy that can significantly reduce emissions compared to conventional fuel gasoline or diesel is being actively made.

As part of this, research on compressed natural gas vehicles that use compressed natural gas (CNG) as a fuel has been continuously conducted. Compressed natural gas not only has better combustion efficiency than gasoline, but also has less air pollution and has economic advantages.

The conventional gas filling system for automobiles is configured to fill fuel tanks with fuel by coupling the dispenser nozzle to a receptacle provided on a gas injection line. In particular, the receptacle is used to prevent the reverse flow of the gas injected from the outside, and the coupling structure must be firm because the gas at the speed of sound passes.

1 is a conceptual diagram illustrating a general gas filling system for a vehicle.

As shown in FIG. 1, the gas filling system for automobiles is provided with a fuel supply line 25 connected to and installed between a fuel tank 23, a fuel rail 24, and a fuel supply line 25. The regulator 26, the fuel injection line 27 connected to the fuel tank 23, the receptacle 30 installed at the end of the fuel injection line 27, the check valve is installed on the fuel injection line 27 300 and 28.

The fuel tank 23 is a place where the compressed natural gas (CNG) is stored, and the number and shape of the fuel tank 23 as well as the number can be appropriately changed according to the type of the vehicle to be applied.

The fuel rail 24 is provided with an injector for injecting the fuel supplied to the cylinder of the engine.

The fuel supply line 25 serves to pressurize the compressed natural gas in the fuel tank 23 to the fuel rail 24, and has a pipe structure of a material having excellent physical properties.

The regulator 26 serves to lower the supply pressure of the compressed natural gas to the pressure required for the engine, and the regulator 26 is connected to the fuel rail 24.

The fuel injection line 27 is for filling the compressed natural gas into the fuel tank 24 from the outside, and has a pipe structure made of a material having excellent physical properties like the fuel supply line 25.

The receptacle 30 is removably coupled with a dispenser nozzle 22 which is connected to the compressor 21.

The check valve 28 is located between the fuel tank 23 and the receptacle 30, and is configured to allow the fluid flow in only one direction so that the piping can be opened and closed magnetically according to the driving state.

On the other hand,

reference numerals

29a, 29b, and 29c illustrate ball valves, filters, and lock off valves commonly used in gas filling systems for automobiles.

However, in the conventional receptacles, in most cases, due to the coupling structure of the adapter, the flow of gas is generated in the adapter when the gas passes at the speed of sound along the inside flow path of the receptacle, which frequently causes components such as valves and springs to be damaged. .

Since the adapter has a structure that is fitted to the end of the body case, a rotational flow is generated in the adapter by the force generated during the passage of the gas at the speed of sound, thereby causing damage to parts such as valves and springs connected to the adapter do.

In particular, current defects in fuel supply line parts are mostly generated in receptacles and valves using compressed natural gas (CNG) at high pressures of about 200 to 300 bar.

In the case of the receptacle, which is a connector for natural gas injection, the certification standard is satisfied as some vehicles have recently been leaked, but a problem may occur due to the deterioration of parts durability due to repeated high-speed charging in actual use environment.

Finally, there has been a problem that the O-ring is easily released from the valve body due to interference with the body case and gas pressure.

The present invention has been made to solve the above problems, the flow is generated in the adapter when the gas passes at the speed of sound along the inside flow path of the receptacle is not damaged parts such as valves and springs, the leakage occurs in the receptacle during gas injection The present invention provides a receptacle for a gas filling system for a compressed natural gas vehicle, which does not easily come off.

In order to achieve the object as described above, the present invention has a stepped portion is formed on the inner circumferential surface of the head case, the adapter is formed with a through-hole through which the valve is penetrated and formed in a cylindrical shape, the bowl is formed but the protrusion The body case is formed on an outer circumferential surface and supports the valve spring, and has a ring shape. When coupled to the head case it is characterized in that the adapter is not rotated by pressing the contact portion of the adapter.

The support portion is characterized in that a plurality of flow path holes are formed radially on the surface in contact with the valve spring.

And, the valve is made of an insertion portion formed in a cylindrical shape so as to penetrate the adapter, and the head portion coupled to one end of the insertion portion elastically by the valve spring to selectively open and close the head case inside flow path, The insertion portion is formed with one or more incision surface to be cut in one direction from the other end, characterized in that the through hole has a shape corresponding to the cross section of the insertion portion.

And, the insertion portion is an O-ring groove is formed in a portion away from the cutting surface in a predetermined distance in one direction, characterized in that the O-ring groove is formed in the O-ring groove.

In addition, the contact portion is cut in contact with the body case is cut, the body case is inserted into the cut portion is characterized in that the contact area is increased.

As described above, by reliably coupling the adapter to the coupling groove of the body case it is possible to prevent the flow of the adapter due to high-pressure gas injection.

That is, the damage of components such as valves and springs caused by the flow of the adapter can be essentially blocked to relatively improve the durability of the receptacle.

In addition, there is an advantage that the O-ring is not separated from the valve can further improve the valve efficiency.

1 is a conceptual diagram showing a gas filling system for a typical vehicle.

2 is an exploded perspective view showing a receptacle of a gas filling system for a compressed natural gas vehicle according to the present invention;

3 is a sectional view showing a receptacle of a gas filling system for a compressed natural gas vehicle according to the present invention;

4 is a component diagram showing a receptacle of a gas filling system for a compressed natural gas vehicle according to the present invention;

5 is a sectional view showing a valve according to the present invention;

Hereinafter, a receptacle of a gas filling system for a compressed natural gas vehicle will be described with reference to the accompanying drawings.

1 is a conceptual view showing a gas filling system for a general vehicle, Figure 2 is an exploded perspective view showing a receptacle of the gas filling system for compressed natural gas vehicle according to the present invention, Figure 3 is a gas for compressed natural gas vehicle according to the present invention 4 is a cross-sectional view showing a receptacle of a filling system, FIG. 4 is a component diagram showing a receptacle of a gas filling system for a compressed natural gas vehicle according to the present invention, and FIG. 5 is a cross-sectional view showing a valve according to the present invention.

2 to 5, the present invention provides a head case 110 coupled to a dispenser nozzle, a body case 120 communicatively coupled to the head case 110, and a portion of the head case 110. The adapter 200 supported on the inner circumferential surface and through and coupled to the adapter 200 and moved forward and backward by injection of compressed natural gas through the dispenser nozzle to selectively open and close the inside flow path of the head case 110. To the receptacle of the gas filling system for automobiles including a valve 300 and a valve spring 400 interposed between the adapter 200 and the valve 300 to enable the valve 300 to flow elastically. In one embodiment, a stepped portion 116 is formed on an inner circumferential surface of the head case 110, and the adapter 200 has a through hole 212 through which the valve 300 penetrates, and a protrusion 210 having a cylindrical shape. )Wow, It is formed in the shape of the foot but is formed on the outer circumferential surface of the protruding portion 210 to support the valve spring 400, and is formed in a ring shape on the outer circumferential surface of the support portion 220 and the end of the stepped portion 116 The front surface is in contact with the jaw surface and the rear surface is composed of a contact portion 230 which is in contact with the body case 120, when the body case 120 is coupled to the head case 110, the contact portion 230 of the adapter 200 ) Is configured to not rotate the adapter 200 by pressing.

Hereinafter, each configuration will be described in detail.

Inside the head case 110 (head case) has a predetermined space 112 is formed, the inclined portion 114 is formed on the inner peripheral surface.

The inclined portion 114 has a structure inclined at a predetermined inclination, and is for selectively opening and closing the inside flow path 112 of the head case 110 by interfering with forward and backward operations of the valve 300.

In addition, the head case 110 preferably uses a metal material having strong strength and hardness. This is to reduce the wear caused by the rotation of the sound speed and the passage of gas, and to maximize the efficiency.

In addition, the front of the head case 110 coupled with the dispensing nozzle is further provided with a ring-shaped head sealing material 111 to prevent the leakage of gas. On the other hand, the shape of the head sealing material 111 may be applied to various shape structures as necessary.

In particular, the step portion 116 is formed on the inner circumferential surface of the head case 110. Here, the stepped portion 116 is a portion having a predetermined thickness on the inner circumferential surface of the head case 110, and if easily described, it may be considered that a ring-shaped member that is the same as the inner circumferential diameter of the head case 110 is coupled. For this reason, the stepped portion 116 has a stepped surface.

The present invention is the basis of the invention that the adapter 200 to be described later is completely in close contact with the stepped surface of the stepped portion 116.

The body case 120 is made of a material having excellent durability and physical properties, and has a connection passage 122 communicating with the inside passage 112 of the head case 110.

Here, when the body case 120 is coupled to the head case 110, the back of the adapter 200 is strongly compressed, so that the front of the adapter 200 is completely in contact with the head case 110 and the rear of the body To be in close contact with the case 120, so that the adapter 200 is not rotated at all.

The adapter 200 according to the present invention has a through hole 212 through which the valve 300 is formed, and has a protruding portion 210 formed in a cylindrical shape and a bowl shape, but is formed on an outer circumferential surface of the protruding portion 210. A support portion 220 supporting the valve spring 400 and a ring shape are formed on an outer circumferential surface of the support portion 220, and the front surface is in contact with the stepped surface of the stepped portion 116, and the rear surface is the body case 120. And a contact portion 230 in contact with the. As described above, when the body case 120 is coupled to the head case 110 due to the adapter 200, the front surface of the body case 120 and the head case 110 is the adapter 200. It is completely in contact with the contact portion 230 of the adapter 200 will not be rotated.

In addition, the adapter 200 is a high-strength metal material that can withstand the rotation of the sound speed and of course excellent in physical properties.

Here, the protruding portion 210 is a portion of the adapter 200 through which the through hole 212 is penetrated so that the valve 300 can be moved back and forth.

In addition, the diameter of the protrusion 210 is made smaller than the diameter of the valve spring 400, the protrusion 210 is inserted into the valve spring 400.

Here, since the support portion 220 is formed in a bowl shape to be formed on the outer circumferential surface of the protrusion 210, the central portion of the support portion 220 has a diameter equal to the diameter of the protrusion 210.

The support portion 220 is to support the end of the valve spring 400 is inserted into the outer periphery of the protrusion 210, and is inclined in a bowl shape to absorb the compressive force of the end deformed by the compression of the valve spring 400 do.

Preferably, the support portion 220 is preferably formed with a plurality of flow path holes 222 radially on the surface in contact with the valve spring 400. This is for the purpose of efficiently transferring the inside passage 112 from the inside passage 112 to the connection passage 122.

Here, the contact portion 230 is formed in a ring shape to wrap around the outer peripheral surface of the support portion 220, the front surface is in contact with the stepped surface of the stepped portion 116 and the rear surface is in contact with the body case 120 .

Therefore, when the body case 120 is coupled to the head case 110, the front of the body case 120 is strongly adhering to the back of the contact portion 230, the front of the contact portion 230 is the head case ( Full contact with the stepped surface of the 110, the front of the head case 110 is in full contact with the back of the contact portion 230 so that the adapter 200 is not integrally rotated.

Preferably, the contact portion 230 is cut in contact with the body case 120, the body case 120 is inserted into the cut portion so that the contact area is increased.

This is because the present invention prevents the adapter 200 from being rotated by the coupling force between the body case 120 and the head case 110, and the fastening strength is increased by increasing the engagement area, so that the contact portion 230 It is good to increase the fastening strength by cutting the entire part of the s) to be in contact with the inner circumferential surface of the body case 120.

The valve 300 according to the present invention is operated forward and backward by injection of compressed natural gas through a dispenser nozzle to selectively open and close the inside flow path 112 of the head case 110, and the adapter Insertion portion 310 having a cylindrical shape so as to penetrate 200 and coupled to one end portion of the insertion portion 310 is elastically flown by the valve spring 400 to selectively select the inside flow path inside the head case 110. Is made of a head portion 320 to open and close, the insertion portion 310 is formed with one or more incision surface to be cut in one direction from the other end, the through hole 212 is the insertion portion of the 310 It is composed of a shape corresponding to the cross section.

The insertion portion 310 is to pass through the adapter 200, the head portion 320 is coupled to one end.

Here, the insertion portion 310 is formed with one or more incision surface in one direction from the other end. Usually, the incision surface is made in pairs, and the through hole 212 is formed in a shape corresponding to the cross section of the insertion portion 310.

Since the valve 300 is also rotated by the movement of the valve 300 and the flow of gas, the durability of the valve 300 is lowered, so that the valve 300 cannot be rotated in the through hole 212. Will be adopted.

That is, the width of the incision surface to be cut in pairs is made less than the width of both sides except the incision surface is prevented from rotating in the through-hole 212.

The valve 300 is elastically supported by the valve spring 400 by sequentially inserting the valve seal 316 and the follow 317 into the insertion portion 310. The valve seal 316 is used for maintaining airtightness, and the follow 317 is formed to surround the valve seal 316.

Both ends of the valve spring 400 are supported by the head part 320 and the support part 220 in the form of wrapping the insertion part 310, and serve to enable the flow of the valve 300.

Preferably, the insertion portion 310 has an o-ring groove 314 is formed in a portion away from the cutting surface in a predetermined distance in one direction, it is preferable that the O-ring member 312 is formed in the O-ring groove 314.

The O-ring member 312 formed in the insertion portion 310 is also affected by the flow of gas, and the O-ring member 312 is moved in the direction of flow by the flow, but the O-ring groove 314 When the O-ring member 312 is formed, the movement of the O-ring member 312 is controlled.

As described above, it is a basic technical idea to mount a knife on the thimble with a spring and use it as necessary, which is merely an example, and those skilled in the art can make various modifications and equivalents therefrom. It will be appreciated that embodiments are possible, and the true technical protection scope of the present invention should be defined only by the appended claims.

The present invention relates to a receptacle of a gas filling system for compressed natural gas vehicles, and more particularly, can be used in the field of receptacles of a gas filling system for compressed natural gas vehicles which are coupled to a dispense nozzle and are not rotated when gas is injected from the outside.

Claims

The head case 110 coupled to the dispenser nozzle, the body case 120 coupled to the head case 110, the adapter 200 is partially supported on the inner peripheral surface of the head case 110, and the adapter ( And a valve 300 which is penetrated to the 200 and moves forward and backward by the injection of compressed natural gas through the dispenser nozzle to selectively open and close the inside flow path of the head case 110, the adapter 200 and the In the receptacle of the gas filling system for automobiles including a valve spring 400 interposed between the valve 300 to enable the valve 300 to be elastically flowable,

On the inner circumferential surface of the head case 110, a stepped portion 116 is formed,

The adapter 200 has a through hole 212 through which the valve 300 penetrates, and has a protrusion 210 formed in a cylindrical shape and a bowl shape, but is formed on an outer circumferential surface of the protrusion 210 so that the valve spring ( The support part 220 supporting the 400 and a ring shape are formed on the outer circumferential surface of the support part 220, and the front surface is in contact with the stepped surface of the stepped part 116, and the rear surface is in contact with the body case 120. Consists of a contact portion 230,

When the body case 120 is coupled to the head case 110, the gas charging system for the compressed natural gas vehicle, characterized in that the contact portion 230 of the adapter 200 is compressed so as not to rotate the adapter 200. Receptacle.
The method of claim 1,

The support unit 220,

Receptacle of a gas filling system for a compressed natural gas vehicle, characterized in that a plurality of flow path holes 222 are formed radially on the surface in contact with the valve spring (400).
The method of claim 1,

The valve 300 is

Insertion portion 310 having a cylindrical shape so as to penetrate the adapter 200, and is coupled to one end of the insertion portion 310 and elastically flow by the valve spring 400 to flow inside the head case 110 To be made of the head portion 320 to selectively open and close the

The insertion portion 310 is formed with one or more incision surface to be cut in one direction from the other end,

The through hole 212 is a receptacle of a gas filling system for a compressed natural gas vehicle, characterized in that formed in a shape corresponding to the cross section of the insertion portion (310).
The method of claim 3, wherein

The insertion unit 310,

The O-ring groove 314 is formed in a portion away from the incision in a direction at a predetermined distance, the O-ring groove 314, the O-ring member 312, characterized in that the gas filling system for a compressed natural gas vehicle.
The method of claim 1,

The contact portion 230,

Receptacle of the gas filling system for a compressed natural gas vehicle, characterized in that the predetermined portion in contact with the body case 120 is cut, the body case 120 is inserted into the cut portion to increase the contact area.